Investments (Composition Of Current And Past Due Mortgage Loans On Real Estate) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Mortgage Loans On Real Estate Aging [Abstract]
Allowance for credit losses	$ (99)	$ (96)
Unamortized premium (discount)	28	16
Mark-to-market gains (losses)	(27)	(3)
Total carrying value	18,301	17,991
Current [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	18,318	18,004
30 to 59 Days Past Due [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	42	36
60 to 89 Days Past Due [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	6	5
90 Or More Days Past Due [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	33	29
Commercial [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross		17,171
Allowance for credit losses	(84)	(79)
Unamortized premium (discount)	(8)	(11)
Mark-to-market gains (losses)	(27)	(3)
Total carrying value	16,903	17,089
Commercial [Member] \| Current [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	17,003	17,167
Commercial [Member] \| 30 to 59 Days Past Due [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	19	15
Residential [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	1,413	919
Allowance for credit losses	(15)	(17)
Unamortized premium (discount)	36	27
Total carrying value	1,398	902
Residential [Member] \| Current [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	1,315	837
Residential [Member] \| 30 to 59 Days Past Due [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	23	21
Residential [Member] \| 60 to 89 Days Past Due [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	6	5
Residential [Member] \| 90 Or More Days Past Due [Member]
Mortgage Loans On Real Estate Aging [Abstract]
Mortgage loans on real estate, gross	$ 33	$ 29

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- Definition

The amount of premium (net of discount) that was originally recognized at the issuance of the mortgage loan that has yet to be amortized.

+ References

No definition available.

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This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans and long-term receivables (other than securities categorized as trading, available-for-sale or held-to-maturity) that have contractual principal amounts and for which the fair value option has been elected.

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- Definition

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

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Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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