v3.25.3
Fair Value - Schedule of Valuation Techniques and Quantitative Inputs and Assumptions used for Financial Assets and Liabilities (Details)
$ in Millions
Sep. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Asset Management | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, at fair value $ 4,182 $ 2,794
Asset Management | Discounted cash flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Contingent consideration obligations 58 67
Asset Management | Discounted cash flow | Level 3 | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, at fair value 869 765
Due from related parties $ 14 $ 27
Due from related parties, measurement input 0.140 0.140
Asset Management | Discounted cash flow | Level 3 | Discount rate | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Bank loans $ 17 $ 168
Equity securities 375 417
Asset Management | Discounted cash flow | Level 3 | Discount rate | VIE, Primary Beneficiary | Bonds    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, at fair value 842 412
Asset Management | Direct capitalization | Level 3 | Capitalization rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, at fair value $ 152 $ 128
Investments, measurement input 0.070 0.067
Asset Management | Adjusted transaction value | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, at fair value $ 178 $ 159
Asset Management | Adjusted transaction value | Level 3 | Bonds    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, at fair value   491
Asset Management | Adjusted transaction value | Level 3 | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Bank loans 657 179
Equity securities 934 69
Asset Management | Adjusted transaction value | Level 3 | VIE, Primary Beneficiary | Bonds    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, at fair value 865  
Asset Management | Option model | Level 3 | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity securities 13 27
Asset Management | Option model | Level 3 | Volatility rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative assets $ 11 $ 29
Derivative assets, measurement input 0.375 0.525
Asset Management | Dividend discount model | Level 3 | Discount rate | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Due from related parties, measurement input   0.141
Equity securities   $ 495
Asset Management | Minimum | Discounted cash flow | Level 3 | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input 0.036 0.135
Contingent consideration obligations, measurement input 0.210 0.200
Asset Management | Minimum | Discounted cash flow | Level 3 | Discount rate | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Bank loans, measurement input 0.049 0.056
Equity securities, measurement input 0.137 0.083
Asset Management | Minimum | Discounted cash flow | Level 3 | Discount rate | VIE, Primary Beneficiary | Bonds    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input 0.052 0.066
Asset Management | Minimum | Option model | Level 3 | Volatility rate | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity securities, measurement input 0.800 0.848
Asset Management | Maximum | Discounted cash flow | Level 3 | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input 0.528 0.528
Contingent consideration obligations, measurement input 0.250 0.250
Asset Management | Maximum | Discounted cash flow | Level 3 | Discount rate | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Bank loans, measurement input 0.156 0.234
Equity securities, measurement input 0.170 0.133
Asset Management | Maximum | Discounted cash flow | Level 3 | Discount rate | VIE, Primary Beneficiary | Bonds    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input 0.075 0.117
Asset Management | Maximum | Option model | Level 3 | Volatility rate | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity securities, measurement input 0.850 1.175
Asset Management | Weighted Average | Discounted cash flow | Level 3 | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input 0.172 0.178
Due from related parties, measurement input 0.140 0.140
Contingent consideration obligations, measurement input 0.238 0.236
Asset Management | Weighted Average | Discounted cash flow | Level 3 | Discount rate | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Bank loans, measurement input 0.064 0.090
Equity securities, measurement input 0.137 0.133
Asset Management | Weighted Average | Discounted cash flow | Level 3 | Discount rate | VIE, Primary Beneficiary | Bonds    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input 0.054 0.070
Asset Management | Weighted Average | Direct capitalization | Level 3 | Capitalization rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input 0.070 0.067
Asset Management | Weighted Average | Option model | Level 3 | Volatility rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative assets, measurement input 0.375 0.525
Asset Management | Weighted Average | Option model | Level 3 | Volatility rate | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity securities, measurement input 0.829 1.107
Asset Management | Weighted Average | Dividend discount model | Level 3 | Discount rate | VIE, Primary Beneficiary    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Due from related parties, measurement input   0.141
Retirement Services | Discounted cash flow | Level 3 | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, at fair value $ 1,303 $ 1,909
AFS, trading and equity securities 31,304 28,655
Mortgage loans 85,164 67,115
Retirement Services | Discounted cash flow | Level 3 | Nonperformance risk    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Embedded derivative 14,299 $ 11,242
Retirement Services | Recoverability | Level 3 | Estimated proceeds    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, at fair value 286  
Mortgage loans $ 182  
Retirement Services | Minimum | Discounted cash flow | Level 3 | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input 0.130 0.066
AFS, trading and equity securities, measurement input 0.024 0.047
Mortgage loans, measurement input 0.012 0.018
Retirement Services | Minimum | Discounted cash flow | Level 3 | Nonperformance risk    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Embedded derivative, measurement input 0.004 0.004
Retirement Services | Minimum | Discounted cash flow | Level 3 | Option budget    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Embedded derivative, measurement input 0.005 0.005
Retirement Services | Minimum | Discounted cash flow | Level 3 | Surrender rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Embedded derivative, measurement input 0.059 0.060
Retirement Services | Maximum | Discounted cash flow | Level 3 | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input 0.140 0.140
AFS, trading and equity securities, measurement input 0.226 0.200
Mortgage loans, measurement input 0.314 0.431
Retirement Services | Maximum | Discounted cash flow | Level 3 | Nonperformance risk    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Embedded derivative, measurement input 0.010 0.011
Retirement Services | Maximum | Discounted cash flow | Level 3 | Option budget    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Embedded derivative, measurement input 0.060 0.060
Retirement Services | Maximum | Discounted cash flow | Level 3 | Surrender rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Embedded derivative, measurement input 0.141 0.142
Retirement Services | Weighted Average | Discounted cash flow | Level 3 | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input 0.131 0.108
AFS, trading and equity securities, measurement input 0.065 0.071
Mortgage loans, measurement input 0.062 0.067
Retirement Services | Weighted Average | Discounted cash flow | Level 3 | Nonperformance risk    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Embedded derivative, measurement input 0.006 0.007
Retirement Services | Weighted Average | Discounted cash flow | Level 3 | Option budget    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Embedded derivative, measurement input 0.031 0.028
Retirement Services | Weighted Average | Discounted cash flow | Level 3 | Surrender rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Embedded derivative, measurement input 0.096 0.090