v3.25.1
Accumulated Other Comprehensive Income (Loss) by Component (Schedule of Accumulated Other Comprehensive Income (Loss) by Component) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 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 196 $ 69
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (10) (31)
Other comprehensive income (loss) after tax (expense) benefit 206 100
Total stockholder's equity at end of period 10,279 9,662
Reclassification from AOCI, tax 1 8
Tax (expense) benefit on other comprehensive income (loss) (42) (35)
Accumulated other comprehensive income (loss)    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period (1,991) (2,672)
Total stockholder's equity at end of period (1,785) (2,572)
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 (13) (12)
Other comprehensive income (loss) before reclassifications (5) (1)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (2) (3)
Other comprehensive income (loss) after tax (expense) benefit (3) 2
Total stockholder's equity at end of period (16) (10)
Reclassification from AOCI, tax 0 1
Tax (expense) benefit on other comprehensive income (loss) 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 (1,876) (1,613)
Other comprehensive income (loss) before reclassifications 277 (239)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (6) (22)
Other comprehensive income (loss) after tax (expense) benefit 283 (217)
Total stockholder's equity at end of period (1,593) (1,830)
Reclassification from AOCI, tax 1 6
Tax (expense) benefit on other comprehensive income (loss) (74) 58
Pension and postretirement benefits    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period (191) (525)
Other comprehensive income (loss) before reclassifications 0 0
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (2) (6)
Other comprehensive income (loss) after tax (expense) benefit 2 6
Total stockholder's equity at end of period (189) (519)
Reclassification from AOCI, tax 0 1
Tax (expense) benefit on other comprehensive income (loss) 0 (1)
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 353 (359)
Other comprehensive income (loss) before reclassifications (114) 341
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 0 0
Other comprehensive income (loss) after tax (expense) benefit (114) 341
Total stockholder's equity at end of period 239 (18)
Reclassification from AOCI, tax 0  
Tax (expense) benefit on other comprehensive income (loss) 31 (91)
Cumulative foreign currency translation adjustment    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period (264) (163)
Other comprehensive income (loss) before reclassifications 38 (32)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 0 0
Other comprehensive income (loss) after tax (expense) benefit 38 (32)
Total stockholder's equity at end of period (226) (195)
Reclassification from AOCI, tax 0 0
Tax (expense) benefit on other comprehensive income (loss) $ 0 $ 0