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Income Taxes (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Oct. 31, 2021
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Income Tax Disclosure [Abstract]              
Effective tax rates on income from continuing operations (as a percent)     21.50% (2.00%) 20.70% 16.30%  
Valuation allowance related to certain tax attribute carryforward     $ 850   $ 850    
Valuation Allowance [Line Items]              
Deferred tax asset valuation allowance recognized         (23)    
Additional tax payments $ 10 $ 354          
Unrecognized tax benefits, excluding interest and penalties     1,200   1,200   $ 1,200
Unrecognized tax benefits, if recognized would not affect the effective tax rate     2   2   22
Unrecognized tax benefits, if recognized would favorably affect the effective tax rate     1,200   1,200   1,100
Unrecognized tax benefits, interest and penalties accrued     66   66   $ 69
Unrecognized tax benefits, interest net of the federal (benefit) expense and penalties         3 $ 203  
Decrease in unrecognized tax benefits is reasonably possible in the next twelve months     11   11    
U.S.. Life Insurance Companies              
Valuation Allowance [Line Items]              
Deferred tax asset valuation allowance recognized     735   1,500    
Non U.S.. Life Insurance Companies              
Valuation Allowance [Line Items]              
Deferred tax asset valuation allowance recognized     $ 460   $ 630