v3.24.0.1
Fair Value - Schedule of Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)
$ in Millions
12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, recurring basis, unobservable input reconciliation, asset, gain (loss) statement of income, extensible list, not disclosed flag Included in income  
Fair value, recurring basis, unobservable input reconciliation, asset, gain (loss) statement of other comprehensive income, extensible list, not disclosed flag Included in OCI  
Fair value, recurring basis, unobservable input reconciliation, liability, gain (loss) statement of income, extensible list, not disclosed flag Included in income  
Fair value, liability, recurring basis still held, unrealized gain (loss), statement of income, extensible list, not disclosed flag   Total gains (losses) included in earnings1
Fair value, asset, recurring basis, still held unrealized gain (loss), statement of income, extensible list, not disclosed flag Total gains (losses) included in earnings1  
AFS securities $ 148,347 $ 112,225
Liabilities 10,990 7,410
Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Total Assets – Asset Management 244,289 177,402
Total Liabilities – Asset Management 17,743 13,208
Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Total Assets – Asset Management 24,595 14,846
Total Liabilities – Asset Management 17 40
Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Total Assets – Asset Management 131,185 104,503
Total Liabilities – Asset Management 1,958 1,587
Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Total Assets – Asset Management 73,478 47,931
Total Liabilities – Asset Management 15,768 11,581
NAV | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Total Assets – Asset Management 15,031 10,122
Asset Management    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 1,825 14,134
Total realized and unrealized gains (losses) included in income 132 272
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 738 96
Net transfers in (out) (2) (12,677)
Ending balance 2,693 1,825
Total gains (losses) included in earnings 81 73
Total gains (losses) included in OCI 0 0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 86 7,654
Total realized and unrealized gains (losses) included in income 11 (91)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (4) (419)
Net transfers in (out) 0 (7,058)
Ending balance 93 86
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
Asset Management | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Equity securities   1,320
Assets, subtotal 13 15
AFS securities   709
Other assets 378  
Total Assets – Asset Management 5,986 6,815
Contingent consideration obligations 93 86
Liabilities 42 57
Other liabilities   2
Total Liabilities – Asset Management 138 145
Investments, at fair value 1,489  
Due from related parties 37 43
Asset Management | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Equity securities   190
Assets, subtotal 0 0
AFS securities   709
Other assets 0  
Total Assets – Asset Management 3,014 3,258
Contingent consideration obligations 0 0
Liabilities 0 0
Other liabilities   2
Total Liabilities – Asset Management 0 2
Investments, at fair value 202  
Due from related parties 0 0
Asset Management | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Equity securities   39
Assets, subtotal 0 0
AFS securities   0
Other assets 0  
Total Assets – Asset Management 54 1,576
Contingent consideration obligations 0 0
Liabilities 42 57
Other liabilities   0
Total Liabilities – Asset Management 45 57
Investments, at fair value 38  
Due from related parties 0 0
Asset Management | Level 3 | Embedded value    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, at fair value   526
Asset Management | Level 3 | Discounted cash flow    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Contingent consideration obligations 93 86
Asset Management | Level 3 | Discounted cash flow | Discount rate    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, at fair value 857 128
Due from related parties $ 37 $ 43
Due from related parties, measurement input 0.140 0.150
Asset Management | Level 3 | Discounted cash flow | Discount rate | Minimum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input 0.105 0.089
Contingent consideration obligations, measurement input 0.200 0.200
Asset Management | Level 3 | Discounted cash flow | Discount rate | Maximum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input 0.528 0.528
Contingent consideration obligations, measurement input 0.250 0.250
Asset Management | Level 3 | Discounted cash flow | Discount rate | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input 0.172 0.287
Due from related parties, measurement input 0.140 0.150
Contingent consideration obligations, measurement input 0.233 0.227
Asset Management | Level 3 | Adjusted transaction value    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Equity securities $ 131  
Investments, at fair value 219 $ 429
Asset Management | Level 3 | Option model    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Assets, subtotal   $ 15
Asset Management | Level 3 | Option model | Volatility rate    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Assets, subtotal $ 13  
Derivative assets, measurement input 0.625 0.600
Asset Management | Level 3 | Option model | Volatility rate | Minimum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Contingent consideration obligations, measurement input 0.314 0.298
Asset Management | Level 3 | Option model | Volatility rate | Maximum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Contingent consideration obligations, measurement input 0.334 0.396
Asset Management | Level 3 | Option model | Volatility rate | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Derivative assets, measurement input 0.625 0.600
Contingent consideration obligations, measurement input 0.324 0.347
Asset Management | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Equity securities   $ 1,083
Assets, subtotal $ 13 15
AFS securities   0
Other assets 378  
Total Assets – Asset Management 2,730 1,868
Contingent consideration obligations 93 86
Liabilities 0 0
Other liabilities   0
Total Liabilities – Asset Management 93 86
Investments, at fair value 1,188  
Due from related parties 37 43
Asset Management | NAV | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Equity securities   8
Total Assets – Asset Management 188 113
Investments, at fair value 61  
Asset Management | Bonds | Level 3 | Adjusted transaction value    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, at fair value 163  
Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 45,582 45,752
Total realized and unrealized gains (losses) included in income 2,485 (9,969)
Total realized and unrealized gains (losses) included in OCI 195 (621)
Net purchases, issuances, sales and settlements 23,784 11,721
Net transfers in (out) (1,676) (1,301)
Ending balance 70,370 45,582
Total gains (losses) included in earnings 336 (3,104)
Total gains (losses) included in OCI 151 (635)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (8,525) (10,908)
Total realized and unrealized gains (losses) included in income (1,549) 3,689
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (1,850) (1,306)
Net transfers in (out) 0 0
Ending balance (11,924) (8,525)
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
Retirement Services | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities 1,706 1,595
Equity securities 935 1,087
Mortgage loans   27,454
Funds withheld at interest – embedded derivative (3,379) (4,847)
Assets, subtotal 5,298 3,309
Short-term investments 341 520
Other investments 943 611
Cash and cash equivalents 13,020 7,779
AFS securities 134,338 102,404
Reinsurance recoverable 1,367 1,388
Other assets   481
Total Assets – Asset Management 238,303 170,587
Liabilities 1,995 1,646
Other liabilities 266 65
Total Liabilities – Asset Management 17,605 13,063
Embedded derivative 9,059 5,841
Retirement Services | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities 24 23
Equity securities 210 150
Mortgage loans   0
Funds withheld at interest – embedded derivative 0 0
Assets, subtotal 108 42
Short-term investments 0 29
Other investments 0 0
Cash and cash equivalents 13,020 7,779
AFS securities 6,297 2,570
Reinsurance recoverable 0 0
Other assets   0
Total Assets – Asset Management 21,581 11,588
Liabilities 17 38
Other liabilities 0 0
Total Liabilities – Asset Management 17 38
Embedded derivative 0 0
Retirement Services | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities 1,654 1,519
Equity securities 699 845
Mortgage loans   0
Funds withheld at interest – embedded derivative 0 0
Assets, subtotal 5,190 3,267
Short-term investments 236 455
Other investments 313 170
Cash and cash equivalents 0 0
AFS securities 118,247 93,069
Reinsurance recoverable 0 0
Other assets   0
Total Assets – Asset Management 131,131 102,927
Liabilities 1,977 1,607
Other liabilities (64) (77)
Total Liabilities – Asset Management 1,913 1,530
Embedded derivative 0 0
Retirement Services | Level 3 | Embedded value    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, at fair value   959
Retirement Services | Level 3 | Discounted cash flow    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative   5,841
Retirement Services | Level 3 | Discounted cash flow | Discount rate    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Mortgage loans 47,569 30,811
Investments, at fair value 1,574 $ 506
Investments, measurement input   0.064
AFS, trading and equity securities $ 14,247 $ 10,671
Retirement Services | Level 3 | Discounted cash flow | Discount rate | Minimum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input 0.063  
AFS, trading and equity securities, measurement input 0.023 0.022
Mortgage loans, measurement input 0.025 0.015
Retirement Services | Level 3 | Discounted cash flow | Discount rate | Maximum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input 0.135  
AFS, trading and equity securities, measurement input 0.181 0.188
Mortgage loans, measurement input 0.206 0.221
Retirement Services | Level 3 | Discounted cash flow | Discount rate | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input 0.112 0.064
AFS, trading and equity securities, measurement input 0.070 0.068
Mortgage loans, measurement input 0.068 0.063
Retirement Services | Level 3 | Discounted cash flow | Nonperformance risk    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative $ 9,059  
Retirement Services | Level 3 | Discounted cash flow | Nonperformance risk | Minimum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative, measurement input 0.004 0.001
Retirement Services | Level 3 | Discounted cash flow | Nonperformance risk | Maximum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative, measurement input 0.014 0.017
Retirement Services | Level 3 | Discounted cash flow | Nonperformance risk | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative, measurement input 0.009 0.010
Retirement Services | Level 3 | Discounted cash flow | Option budget | Minimum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative, measurement input 0.005 0.005
Retirement Services | Level 3 | Discounted cash flow | Option budget | Maximum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative, measurement input 0.060 0.053
Retirement Services | Level 3 | Discounted cash flow | Option budget | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative, measurement input 0.023 0.019
Retirement Services | Level 3 | Discounted cash flow | Surrender rate | Minimum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative, measurement input 0.060 0.051
Retirement Services | Level 3 | Discounted cash flow | Surrender rate | Maximum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative, measurement input 0.134 0.115
Retirement Services | Level 3 | Discounted cash flow | Surrender rate | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Embedded derivative, measurement input 0.087 0.081
Retirement Services | Level 3 | Discounted cash flow / Guideline public equity | Discount rate    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, at fair value   $ 873
Investments, measurement input   0.165
Retirement Services | Level 3 | Discounted cash flow / Guideline public equity | Discount rate | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input   0.165
Retirement Services | Level 3 | Discounted cash flow / Guideline public equity | Guideline public equity    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input   9
Retirement Services | Level 3 | Discounted cash flow / Guideline public equity | Guideline public equity | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input   9
Retirement Services | Level 3 | Net tangible asset values | Implied multiple    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, at fair value $ 483 $ 529
Investments, measurement input 1.14 1.26
Retirement Services | Level 3 | Net tangible asset values | Implied multiple | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input 1.14 1.26
Retirement Services | Level 3 | Reported net asset value    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, at fair value   $ 563
Retirement Services | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities $ 28 53
Equity securities 26 92
Mortgage loans   27,454
Funds withheld at interest – embedded derivative (3,379) (4,847)
Assets, subtotal 0 0
Short-term investments 105 36
Other investments 630 441
Cash and cash equivalents 0 0
AFS securities 9,794 6,765
Reinsurance recoverable 1,367 1,388
Other assets   481
Total Assets – Asset Management 70,748 46,063
Liabilities 1 1
Other liabilities 330 142
Total Liabilities – Asset Management 15,675 11,495
Embedded derivative 9,059 5,841
Retirement Services | NAV | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Total Assets – Asset Management 14,843 10,009
Retirement Services | Corporate | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 78,246 60,901
Retirement Services | Corporate | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 10 0
Retirement Services | Corporate | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 75,711 59,236
Retirement Services | Corporate | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 2,525 1,665
Retirement Services | CLO | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 20,207 16,493
Retirement Services | CLO | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 0 0
Retirement Services | CLO | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 20,207 16,493
Retirement Services | CLO | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 0 0
Retirement Services | ABS | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 13,383 10,527
Retirement Services | ABS | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 0 0
Retirement Services | ABS | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 6,440 5,660
Retirement Services | ABS | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 6,943 4,867
Retirement Services | U.S. state, municipal and political subdivisions | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 1,046 927
Retirement Services | U.S. state, municipal and political subdivisions | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 0 0
Retirement Services | U.S. state, municipal and political subdivisions | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 1,046 927
Retirement Services | U.S. state, municipal and political subdivisions | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 0 0
Contingent consideration obligations | Asset Management    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 86 126
Total realized and unrealized gains (losses) included in income 11 (63)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (4) 23
Net transfers in (out) 0 0
Ending balance 93 86
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
Debt and other liabilities of consolidated VIEs | Asset Management    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0 7,528
Total realized and unrealized gains (losses) included in income   (28)
Total realized and unrealized gains (losses) included in OCI   0
Net purchases, issuances, sales and settlements   (442)
Net transfers in (out)   (7,058)
Ending balance   0
Total gains (losses) included in earnings   0
Total gains (losses) included in OCI   0
Embedded derivatives | Retirement Services    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (5,841) (7,408)
Total realized and unrealized gains (losses) included in income (1,443) 2,768
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (1,775) (1,201)
Net transfers in (out) 0 0
Ending balance (9,059) (5,841)
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
Universal life benefits | Retirement Services    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (829) (1,235)
Total realized and unrealized gains (losses) included in income (5) 406
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 0 0
Net transfers in (out) 0 0
Ending balance (834) (829)
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
AmerUs Closed Block | Retirement Services    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (1,164) (1,520)
Total realized and unrealized gains (losses) included in income (14) 356
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 0 0
Net transfers in (out) 0 0
Ending balance (1,178) (1,164)
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
ILICO Closed Block and life benefits | Retirement Services    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (548) (742)
Total realized and unrealized gains (losses) included in income 26 194
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 0 0
Net transfers in (out) 0 0
Ending balance (522) (548)
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
Derivative liabilities | Retirement Services    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (1) (3)
Total realized and unrealized gains (losses) included in income 0 2
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 0 0
Net transfers in (out) 0 0
Ending balance (1) (1)
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
Other liabilities | Retirement Services    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (142) 0
Total realized and unrealized gains (losses) included in income (113) (37)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (75) (105)
Net transfers in (out) 0 0
Ending balance (330) (142)
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
Interest sensitive contract liabilities | Retirement Services    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Net purchases, issuances, sales and settlements (1,775) (1,201)
Net transfers in (out) 0 0
Investments and derivative assets | Asset Management    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 1,098 946
Total realized and unrealized gains (losses) included in income   20
Total realized and unrealized gains (losses) included in OCI   0
Net purchases, issuances, sales and settlements 40 109
Net transfers in (out) 0 23
Ending balance   1,098
Total gains (losses) included in earnings   56
Total gains (losses) included in OCI   0
Investments, at fair value | Asset Management    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 1,098  
Total realized and unrealized gains (losses) included in income 63  
Total realized and unrealized gains (losses) included in OCI 0  
Net purchases, issuances, sales and settlements 40 109
Net transfers in (out) 0 23
Ending balance 1,201 1,098
Total gains (losses) included in earnings 68  
Total gains (losses) included in OCI 0  
Foreign governments | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 1 2
Total realized and unrealized gains (losses) included in income 0 (1)
Total realized and unrealized gains (losses) included in OCI (2) 0
Net purchases, issuances, sales and settlements 41 0
Net transfers in (out) 0 0
Ending balance 40 1
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI (2) 0
Corporate | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 1,665 1,339
Total realized and unrealized gains (losses) included in income (21) (16)
Total realized and unrealized gains (losses) included in OCI 45 (123)
Net purchases, issuances, sales and settlements 1,298 364
Net transfers in (out) (462) 101
Ending balance 2,525 1,665
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 21 (119)
CLO | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0 14
Total realized and unrealized gains (losses) included in income   (2)
Total realized and unrealized gains (losses) included in OCI   0
Net purchases, issuances, sales and settlements   (9)
Net transfers in (out)   (3)
Ending balance   0
Total gains (losses) included in earnings   0
Total gains (losses) included in OCI   0
ABS | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 4,867 3,619
Total realized and unrealized gains (losses) included in income (9) 1
Total realized and unrealized gains (losses) included in OCI 61 (183)
Net purchases, issuances, sales and settlements 3,241 788
Net transfers in (out) (1,217) 642
Ending balance 6,943 4,867
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 45 (216)
CMBS | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0 43
Total realized and unrealized gains (losses) included in income 0 0
Total realized and unrealized gains (losses) included in OCI 1 (17)
Net purchases, issuances, sales and settlements 0 0
Net transfers in (out) 20 (26)
Ending balance 21 0
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 3 0
RMBS | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 232 0
Total realized and unrealized gains (losses) included in income 8 0
Total realized and unrealized gains (losses) included in OCI 4 3
Net purchases, issuances, sales and settlements 256 295
Net transfers in (out) (235) (66)
Ending balance 265 232
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 2 4
Trading securities | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 53 69
Total realized and unrealized gains (losses) included in income 2 (9)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (16) (10)
Net transfers in (out) (11) 3
Ending balance 28 53
Total gains (losses) included in earnings 0 (5)
Total gains (losses) included in OCI 0 0
Equity securities | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 92 429
Total realized and unrealized gains (losses) included in income (8) 26
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (45) (4)
Net transfers in (out) (13) (359)
Ending balance 26 92
Total gains (losses) included in earnings 0 22
Total gains (losses) included in OCI 0 0
Mortgage loans | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 27,454 21,154
Total realized and unrealized gains (losses) included in income 183 (2,761)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 16,478 9,061
Net transfers in (out) 0 0
Ending balance 44,115 27,454
Total gains (losses) included in earnings 184 (2,747)
Total gains (losses) included in OCI 0 0
Investment funds | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0 18
Total realized and unrealized gains (losses) included in income   1
Total realized and unrealized gains (losses) included in OCI   0
Net purchases, issuances, sales and settlements   0
Net transfers in (out)   (19)
Ending balance   0
Total gains (losses) included in earnings   0
Total gains (losses) included in OCI   0
Funds withheld at interest – embedded derivative | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (4,847) 0
Total realized and unrealized gains (losses) included in income 1,468 (4,847)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 0 0
Net transfers in (out) 0 0
Ending balance (3,379) (4,847)
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
Short-term investments | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 36 29
Total realized and unrealized gains (losses) included in income 0 0
Total realized and unrealized gains (losses) included in OCI (3) 0
Net purchases, issuances, sales and settlements 69 7
Net transfers in (out) 3 0
Ending balance 105 36
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
Other investments | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 441 0
Total realized and unrealized gains (losses) included in income 0 (91)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 189 36
Net transfers in (out) 0 496
Ending balance 630 441
Total gains (losses) included in earnings (3) (91)
Total gains (losses) included in OCI 0 0
Reinsurance recoverable | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 1,388 1,991
Total realized and unrealized gains (losses) included in income (21) (603)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 0 0
Net transfers in (out) 0 0
Ending balance 1,367 1,388
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
VIE, Primary Beneficiary | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Other liabilities 3  
VIE, Primary Beneficiary | Asset Management | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, at fair value 1,635 2,369
VIE, Primary Beneficiary | Asset Management | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Other liabilities 0  
Investments, at fair value 0 0
VIE, Primary Beneficiary | Asset Management | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Other liabilities 3  
Investments, at fair value 16 1,537
VIE, Primary Beneficiary | Asset Management | Level 3 | Discounted cash flow    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Bank loans 605 29
VIE, Primary Beneficiary | Asset Management | Level 3 | Discounted cash flow | Discount rate    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Bank loans $ 64 $ 215
VIE, Primary Beneficiary | Asset Management | Level 3 | Discounted cash flow | Discount rate | Minimum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Bank loans, measurement input 7.7 6.4
VIE, Primary Beneficiary | Asset Management | Level 3 | Discounted cash flow | Discount rate | Maximum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Bank loans, measurement input 0.110 0.327
VIE, Primary Beneficiary | Asset Management | Level 3 | Discounted cash flow | Discount rate | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Bank loans, measurement input 0.094 0.080
VIE, Primary Beneficiary | Asset Management | Level 3 | Dividend discount model    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Equity securities   $ 458
VIE, Primary Beneficiary | Asset Management | Level 3 | Dividend discount model | Discount rate    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Equity securities $ 494  
Equity securities, measurement input 0.135 0.121
VIE, Primary Beneficiary | Asset Management | Level 3 | Dividend discount model | Discount rate | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Equity securities, measurement input 0.135 0.121
VIE, Primary Beneficiary | Asset Management | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Other liabilities $ 0  
Investments, at fair value 1,492 $ 727
VIE, Primary Beneficiary | Asset Management | NAV | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Other liabilities 0  
Investments, at fair value 127 105
VIE, Primary Beneficiary | Asset Management | Bonds | Level 3 | Discounted cash flow | Discount rate    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, at fair value $ 35 $ 25
Investments, measurement input   0.079
VIE, Primary Beneficiary | Asset Management | Bonds | Level 3 | Discounted cash flow | Discount rate | Minimum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input 0.061  
VIE, Primary Beneficiary | Asset Management | Bonds | Level 3 | Discounted cash flow | Discount rate | Maximum    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input 0.130  
VIE, Primary Beneficiary | Asset Management | Bonds | Level 3 | Discounted cash flow | Discount rate | Weighted average    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments, measurement input 0.107 0.079
VIE, Primary Beneficiary | Retirement Services | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities $ 2,136 $ 1,063
Mortgage loans   2,055
Other investments 103 101
Cash and cash equivalents 98 362
Investment funds 15,820 12,480
VIE, Primary Beneficiary | Retirement Services | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities 0 5
Mortgage loans   0
Other investments 0 0
Cash and cash equivalents 98 362
Investment funds 0 0
VIE, Primary Beneficiary | Retirement Services | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities 284 436
Mortgage loans   0
Other investments 2 2
Cash and cash equivalents 0 0
Investment funds 0 0
VIE, Primary Beneficiary | Retirement Services | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities 1,852 622
Mortgage loans   2,055
Other investments 101 99
Cash and cash equivalents 0 0
Investment funds 977 2,471
VIE, Primary Beneficiary | Retirement Services | NAV | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investment funds 14,843 10,009
VIE, Primary Beneficiary | Investments, at fair value | Asset Management    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 727 13,188
Total realized and unrealized gains (losses) included in income 69 252
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 698 (13)
Net transfers in (out) (2) (12,700)
Ending balance 1,492 727
Total gains (losses) included in earnings 13 17
Total gains (losses) included in OCI 0 0
VIE, Primary Beneficiary | Trading securities | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 622 0
Total realized and unrealized gains (losses) included in income 69 49
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (116) 530
Net transfers in (out) 1,277 43
Ending balance 1,852 622
Total gains (losses) included in earnings 69 11
Total gains (losses) included in OCI 0 0
VIE, Primary Beneficiary | Equity securities | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Net purchases, issuances, sales and settlements   0
Net transfers in (out)   0
VIE, Primary Beneficiary | Mortgage loans | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 2,055 2,152
Total realized and unrealized gains (losses) included in income (9) (227)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 127 (31)
Net transfers in (out) 0 161
Ending balance 2,173 2,055
Total gains (losses) included in earnings (9) (226)
Total gains (losses) included in OCI 0 0
VIE, Primary Beneficiary | Investment funds | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 2,471 1,297
Total realized and unrealized gains (losses) included in income (30) 72
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 73 1,862
Net transfers in (out) (1,537) (760)
Ending balance 977 2,471
Total gains (losses) included in earnings (31) 58
Total gains (losses) included in OCI 0 0
VIE, Primary Beneficiary | Other investments | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 99 0
Total realized and unrealized gains (losses) included in income 9 (17)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (7) 31
Net transfers in (out) 0 85
Ending balance 101 99
Total gains (losses) included in earnings 9 (24)
Total gains (losses) included in OCI 0 0
Related Party    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 14,009 9,821
Related Party | Corporate    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 1,352 982
Related Party | CLO    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 4,268 3,079
Related Party | ABS    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 8,389 5,760
Related Party | Retirement Services | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities 838 878
Equity securities 318 279
Mortgage loans   1,302
Funds withheld at interest – embedded derivative (721) (1,425)
Other investments 343 303
AFS securities 14,009 9,821
Investment funds 1,082 959
Related Party | Retirement Services | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities 0 0
Equity securities 63 0
Mortgage loans   0
Funds withheld at interest – embedded derivative 0 0
Other investments 0 0
AFS securities 0 0
Investment funds 0 0
Related Party | Retirement Services | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities 0 0
Equity securities 0 0
Mortgage loans   0
Funds withheld at interest – embedded derivative 0 0
Other investments 0 0
AFS securities 4,506 3,164
Investment funds 0 0
Related Party | Retirement Services | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Trading securities 838 878
Equity securities 255 279
Mortgage loans   1,302
Funds withheld at interest – embedded derivative (721) (1,425)
Other investments 343 303
AFS securities 9,503 6,657
Investment funds 1,082 959
Related Party | Retirement Services | Corporate | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 1,352 982
Related Party | Retirement Services | Corporate | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 0 0
Related Party | Retirement Services | Corporate | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 181 170
Related Party | Retirement Services | Corporate | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 1,171 812
Related Party | Retirement Services | CLO | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 4,268 3,079
Related Party | Retirement Services | CLO | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 0 0
Related Party | Retirement Services | CLO | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 3,762 2,776
Related Party | Retirement Services | CLO | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 506 303
Related Party | Retirement Services | ABS | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 8,389 5,760
Related Party | Retirement Services | ABS | Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 0 0
Related Party | Retirement Services | ABS | Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 563 218
Related Party | Retirement Services | ABS | Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
AFS securities 7,826 5,542
Related Party | Corporate | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 812 670
Total realized and unrealized gains (losses) included in income 3 (3)
Total realized and unrealized gains (losses) included in OCI (32) (16)
Net purchases, issuances, sales and settlements 173 202
Net transfers in (out) 215 (41)
Ending balance 1,171 812
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI (32) (16)
Related Party | CLO | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 303 202
Total realized and unrealized gains (losses) included in income 0 0
Total realized and unrealized gains (losses) included in OCI 18 (29)
Net purchases, issuances, sales and settlements 185 130
Net transfers in (out) 0 0
Ending balance 506 303
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 18 (29)
Related Party | ABS | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 5,542 6,445
Total realized and unrealized gains (losses) included in income 19 16
Total realized and unrealized gains (losses) included in OCI 103 (256)
Net purchases, issuances, sales and settlements 1,878 (715)
Net transfers in (out) 284 52
Ending balance 7,826 5,542
Total gains (losses) included in earnings 6 (11)
Total gains (losses) included in OCI 96 (259)
Related Party | Trading securities | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 878 1,771
Total realized and unrealized gains (losses) included in income 12 3
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (52) (1,084)
Net transfers in (out) 0 188
Ending balance 838 878
Total gains (losses) included in earnings 8 1
Total gains (losses) included in OCI 0 0
Related Party | Equity securities | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 279 284
Total realized and unrealized gains (losses) included in income 8 (2)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (32) (15)
Net transfers in (out) 0 12
Ending balance 255 279
Total gains (losses) included in earnings 7 0
Total gains (losses) included in OCI 0 0
Related Party | Mortgage loans | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 1,302 1,369
Total realized and unrealized gains (losses) included in income 9 (225)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements (30) 158
Net transfers in (out) 0 0
Ending balance 1,281 1,302
Total gains (losses) included in earnings 8 (225)
Total gains (losses) included in OCI 0 0
Related Party | Investment funds | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 959 2,855
Total realized and unrealized gains (losses) included in income 91 78
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 32 57
Net transfers in (out) 0 (2,031)
Ending balance 1,082 959
Total gains (losses) included in earnings 91 119
Total gains (losses) included in OCI 0 0
Related Party | Funds withheld at interest – embedded derivative | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (1,425) 0
Total realized and unrealized gains (losses) included in income 704 (1,425)
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 0 0
Net transfers in (out) 0 0
Ending balance (721) (1,425)
Total gains (losses) included in earnings 0 0
Total gains (losses) included in OCI 0 0
Related Party | Short-term investments | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0 0
Total realized and unrealized gains (losses) included in income   0
Total realized and unrealized gains (losses) included in OCI   0
Net purchases, issuances, sales and settlements   53
Net transfers in (out)   (53)
Ending balance   0
Total gains (losses) included in earnings   0
Total gains (losses) included in OCI   0
Related Party | Other investments | Retirement Services    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 303 0
Total realized and unrealized gains (losses) included in income (2) 14
Total realized and unrealized gains (losses) included in OCI 0 0
Net purchases, issuances, sales and settlements 42 15
Net transfers in (out) 0 274
Ending balance 343 303
Total gains (losses) included in earnings (3) 14
Total gains (losses) included in OCI $ 0 $ 0