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Investments (Credit Quality Indicators For Residential Mortgage Loans) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Mortgage loans on real estate, ACL	$ 95	$ 203	$ 2
Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Amortized Cost	919	737
Mortgage loans on real estate, ACL	17	17	$ 2
Residential [Member] \| Performing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Amortized Cost	889	666
Residential [Member] \| Nonperforming [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Amortized Cost	$ 30	$ 71

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

Amount, before allowance for credit loss, of financing receivable.