v3.24.2.u1
Business Segments (Summary Of Company's Segment Results) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Segment Reporting Information [Line Items]          
Revenues $ 31 [1] $ 41 [2] $ 65 [3] $ 73 [4]  
Net gains (losses) on financial instruments at fair value and foreign exchange (55) 11 (51) (1)  
Revenues of consolidated VIEs (13) (24) (38) (42)  
Inter-segment revenues 0 [5] 0 [6] 0 [7] 0 [8]  
Total revenues (37) 28 (24) 30  
Losses and loss adjustment 142 28 160 35  
Amortization of deferred acquisition costs and operating 16 21 42 44  
Interest 53 53 105 104  
Expenses of consolidated VIEs 5 4 9 8  
Inter-segment expenses 0 [5] 0 [6] 0 [7] 0 [8]  
Total expenses 216 106 316 191  
Income (loss) from continuing operations before income taxes (253) (78) (340) (161)  
Identifiable assets per segment 2,233   2,233    
Assets held for sale 71   71    
Total identifiable assets 2,304   2,304   $ 2,606
Operating Segments [Member] | US Public Finance Insurance [Member]          
Segment Reporting Information [Line Items]          
Revenues 16 [1] 19 [2] 35 [3] 41 [4]  
Net gains (losses) on financial instruments at fair value and foreign exchange 0 0 1 2  
Revenues of consolidated VIEs 0 0 0 0  
Inter-segment revenues 7 [5] 7 [6] 13 [7] 14 [8]  
Total revenues 23 26 49 57  
Losses and loss adjustment 141 26 163 26  
Amortization of deferred acquisition costs and operating 1 2 3 4  
Interest 0 0 0 0  
Expenses of consolidated VIEs 0 0 0 0  
Inter-segment expenses 11 [5] 9 [6] 22 [7] 21 [8]  
Total expenses 153 37 188 51  
Income (loss) from continuing operations before income taxes (130) (11) (139) 6  
Identifiable assets per segment 1,671   1,671    
Assets held for sale 0   0    
Total identifiable assets 1,671   1,671    
Operating Segments [Member] | Corporate Operations [Member]          
Segment Reporting Information [Line Items]          
Revenues 8 [1] 4 [2] 16 [3] 8 [4]  
Net gains (losses) on financial instruments at fair value and foreign exchange 4 13 12 2  
Revenues of consolidated VIEs 0 0 0 0  
Inter-segment revenues 15 [5] 14 [6] 30 [7] 28 [8]  
Total revenues 27 31 58 38  
Losses and loss adjustment 0 0 0 0  
Amortization of deferred acquisition costs and operating 13 18 34 36  
Interest 13 14 26 28  
Expenses of consolidated VIEs 0 0 0 0  
Inter-segment expenses 5 [5] 5 [6] 11 [7] 11 [8]  
Total expenses 31 37 71 75  
Income (loss) from continuing operations before income taxes (4) (6) (13) (37)  
Identifiable assets per segment 657   657    
Assets held for sale 0   0    
Total identifiable assets 657   657    
Operating Segments [Member] | International And Structured Finance Insurance [Member]          
Segment Reporting Information [Line Items]          
Revenues 8 [1] 17 [2] 15 [3] 24 [4]  
Net gains (losses) on financial instruments at fair value and foreign exchange (59) (2) (64) (5)  
Revenues of consolidated VIEs (13) (24) (38) (42)  
Inter-segment revenues 1 [5] 1 [6] 2 [7] 3 [8]  
Total revenues (63) (8) (85) (20)  
Losses and loss adjustment 1 2 (3) 9  
Amortization of deferred acquisition costs and operating 3 2 5 5  
Interest 40 40 79 76  
Expenses of consolidated VIEs 5 4 9 8  
Inter-segment expenses 7 [5] 5 [6] 13 [7] 12 [8]  
Total expenses 56 53 103 110  
Income (loss) from continuing operations before income taxes (119) (61) (188) (130)  
Identifiable assets per segment 846   846    
Assets held for sale 0   0    
Total identifiable assets 846   846    
Intersegment Elimination [Member]          
Segment Reporting Information [Line Items]          
Revenues (1) [1] 1 [2] (1) [3] 0 [4]  
Net gains (losses) on financial instruments at fair value and foreign exchange 0 0 0 0  
Revenues of consolidated VIEs 0 0 0 0  
Inter-segment revenues (23) [5] (22) [6] (45) [7] (45) [8]  
Total revenues (24) (21) (46) (45)  
Losses and loss adjustment 0 0 0 0  
Amortization of deferred acquisition costs and operating (1) (1) 0 (1)  
Interest 0 (1) 0 0  
Expenses of consolidated VIEs 0 0 0 0  
Inter-segment expenses (23) [5] (19) [6] (46) [7] (44) [8]  
Total expenses (24) (21) (46) (45)  
Income (loss) from continuing operations before income taxes 0 $ 0 0 $ 0  
Identifiable assets per segment [9] (941)   (941)    
Assets held for sale 0   0    
Total identifiable assets $ (941)   $ (941)    
[1] Consists of net premiums earned, net investment income, net realized investment gains (losses) and other net realized gains (losses).
[2] Consists of net premiums earned, net investment income, net realized investment gains (losses) and other net realized gains (losses).
[3] Consists of net premiums earned, net investment income, net realized investment gains (losses) and other net realized gains (losses).
[4] Consists of net premiums earned, net investment income, net realized investment gains (losses) and other net realized gains (losses).
[5] Primarily represents intercompany service charges and intercompany net investment income and expenses.
[6] Primarily represents intercompany service charges and intercompany net investment income and expenses.
[7] Primarily represents intercompany service charges and intercompany net investment income and expenses.
[8] Primarily represents intercompany service charges and intercompany net investment income and expenses.
[9] Consists principally of intercompany reinsurance balances.