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Shareholders' Equity And Dividend Restrictions (Change In AOCI Includes Changes In Unrealized Gains And Losses On Investments And Pension Obligations) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Accumulated Other Comprehensive Income, Before Tax      
Pension obligations OCI $ 45 $ (6) $ 9
Accumulated Other Comprehensive Income, Net of Tax      
AOCI, balance at the beginning of the period (435)    
AOCI, balance at the end of the period (309) (435)  
Accumulated Net Unrealized Investment Gain (Loss)      
Accumulated Other Comprehensive Income, Before Tax      
AOCI, balance at the beginning of the period (570) (847) 792
OCI before investment gains and losses, net, recognized in net income (99) 255 (1,642)
Investment gains and losses, net, recognized in net income 116 22 3
OCI 17 277 (1,639)
AOCI, balance at the end of the period (553) (570) (847)
Accumulated Other Comprehensive Income, Income Tax      
AOCI, balance at the beginning of the period (123) (182) 165
OCI before investment gains and losses, net, recognized in net income (20) 55 (347)
Investment gains and losses, net, recognized in net income 24 4 0
OCI 4 59 (347)
AOCI, balance at the end of the period (119) (123) (182)
Accumulated Other Comprehensive Income, Net of Tax      
AOCI, balance at the beginning of the period (447) (665) 627
OCI before investment gains and losses, net, recognized in net income (79) 200 (1,295)
Investment gains and losses, net, recognized in net income 92 18 3
OCI 13 218 (1,292)
AOCI, balance at the end of the period (434) (447) (665)
Accumulated Defined Benefit Plans Adjustment      
Accumulated Other Comprehensive Income, Before Tax      
AOCI, balance at the beginning of the period 30 36 27
OCI before investment gains and losses, net, recognized in net income 44 2 12
Investment gains and losses, net, recognized in net income 1 (8) (3)
OCI 45 (6) 9
AOCI, balance at the end of the period 75 30 36
Accumulated Other Comprehensive Income, Income Tax      
AOCI, balance at the beginning of the period 8 9 7
OCI before investment gains and losses, net, recognized in net income 9 1 2
Investment gains and losses, net, recognized in net income 0 (2) 0
OCI 9 (1) 2
AOCI, balance at the end of the period 17 8 9
Accumulated Other Comprehensive Income, Net of Tax      
AOCI, balance at the beginning of the period 22 27 20
OCI before investment gains and losses, net, recognized in net income 35 1 10
Investment gains and losses, net, recognized in net income 1 (6) (3)
OCI 36 (5) 7
AOCI, balance at the end of the period 58 22 27
Accumulated Net Unrealized Gain (Loss) on Life Policy Reserves, Reinsurance Recoverable And Other      
Accumulated Other Comprehensive Income, Before Tax      
AOCI, balance at the beginning of the period (13) 29 (444)
OCI before investment gains and losses, net, recognized in net income 98 (42) 473
Investment gains and losses, net, recognized in net income 0 0 0
OCI 98 (42) 473
AOCI, balance at the end of the period 85 (13) 29
Accumulated Other Comprehensive Income, Income Tax      
AOCI, balance at the beginning of the period (3) 5 (94)
OCI before investment gains and losses, net, recognized in net income 21 (8) 99
Investment gains and losses, net, recognized in net income 0 0 0
OCI 21 (8) 99
AOCI, balance at the end of the period 18 (3) 5
Accumulated Other Comprehensive Income, Net of Tax      
AOCI, balance at the beginning of the period (10) 24 (350)
OCI before investment gains and losses, net, recognized in net income 77 (34) 374
Investment gains and losses, net, recognized in net income 0 0 0
OCI 77 (34) 374
AOCI, balance at the end of the period 67 (10) 24
Accumulated Other Comprehensive Income (Loss)      
Accumulated Other Comprehensive Income, Before Tax      
AOCI, balance at the beginning of the period (553) (782) 375
Investments OCI 17 277 (1,639)
Pension obligations OCI 45 (6) 9
Life policy reserves, reinsurance recoverable and other OCI 98 (42) 473
Total OCI 160 229 (1,157)
AOCI, balance at the end of the period (393) (553) (782)
Accumulated Other Comprehensive Income, Income Tax      
AOCI, balance at the beginning of the period (118) (168) 78
Investments OCI 4 59 (347)
Pension obligations OCI 9 (1) 2
Life policy reserves, reinsurance recoverable and other OCI 21 (8) 99
Total OCI 34 50 (246)
AOCI, balance at the end of the period (84) (118) (168)
Accumulated Other Comprehensive Income, Net of Tax      
AOCI, balance at the beginning of the period (435) (614) 297
Investments OCI 13 218 (1,292)
Pension obligations OCI 36 (5) 7
Life policy reserves, reinsurance recoverable and other OCI 77 (34) 374
Total OCI 126 179 (911)
AOCI, balance at the end of the period $ (309) $ (435) $ (614)