v3.25.2
Accumulated Other Comprehensive Income (Loss) by Component (Schedule of Accumulated Other Comprehensive Income (Loss) by Component) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Total stockholder's equity at beginning of period     $ 10,513  
Other comprehensive income (loss) before reclassifications $ 162 $ 9 358 $ 78
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (37) (16) (47) (47)
Other comprehensive income (loss) after tax (expense) benefit 199 25 405 125
Total stockholder's equity at end of period 10,661 9,874 10,661 9,874
Reclassification from AOCI, tax 13 3 14 11
Tax (expense) benefit on other comprehensive income (loss) (23) (7) (65) (42)
Accumulated other comprehensive income (loss)        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Total stockholder's equity at beginning of period (1,785) (2,572) (1,991) (2,672)
Total stockholder's equity at end of period (1,586) (2,547) (1,586) (2,547)
Net unrealized gains (losses) on investments | Net unrealized gains (losses) on investments with an allowance for credit losses        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Total stockholder's equity at beginning of period (16) (10) (13) (12)
Other comprehensive income (loss) before reclassifications (5) (4) (10) (5)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (6) (4) (8) (7)
Other comprehensive income (loss) after tax (expense) benefit 1 0 (2) 2
Total stockholder's equity at end of period (15) (10) (15) (10)
Reclassification from AOCI, tax 2 1 2 2
Tax (expense) benefit on other comprehensive income (loss) 0 0 1 (1)
Net unrealized gains (losses) on investments | Net unrealized gains and losses on other investments        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Total stockholder's equity at beginning of period (1,593) (1,830) (1,876) (1,613)
Other comprehensive income (loss) before reclassifications 42 (250) 319 (489)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (30) (6) (36) (28)
Other comprehensive income (loss) after tax (expense) benefit 72 (244) 355 (461)
Total stockholder's equity at end of period (1,521) (2,074) (1,521) (2,074)
Reclassification from AOCI, tax 10 1 11 7
Tax (expense) benefit on other comprehensive income (loss) (22) 66 (96) 124
Pension and postretirement benefits        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Total stockholder's equity at beginning of period (189) (519) (191) (525)
Other comprehensive income (loss) before reclassifications 0 0 0 0
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (1) (6) (3) (12)
Other comprehensive income (loss) after tax (expense) benefit 1 6 3 12
Total stockholder's equity at end of period (188) (513) (188) (513)
Reclassification from AOCI, tax 1 1 1 2
Tax (expense) benefit on other comprehensive income (loss) (1) (1) (1) (2)
Cumulative impact of changes in discount rates used to measure long duration contracts        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Total stockholder's equity at beginning of period 239 (18) 353 (359)
Other comprehensive income (loss) before reclassifications (3) 273 (117) 614
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 0 0 0 0
Other comprehensive income (loss) after tax (expense) benefit (3) 273 (117) 614
Total stockholder's equity at end of period 236 255 236 255
Reclassification from AOCI, tax 0 0 0  
Tax (expense) benefit on other comprehensive income (loss) 0 (72) 31 (163)
Cumulative foreign currency translation adjustment        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Total stockholder's equity at beginning of period (226) (195) (264) (163)
Other comprehensive income (loss) before reclassifications 128 (10) 166 (42)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 0 0 0 0
Other comprehensive income (loss) after tax (expense) benefit 128 (10) 166 (42)
Total stockholder's equity at end of period (98) (205) (98) (205)
Reclassification from AOCI, tax 0 0 0 0
Tax (expense) benefit on other comprehensive income (loss) $ 0 $ 0 $ 0 $ 0