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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Investments (Reconciliation Of Available-For-Sale Securities From Cost Basis To Fair Value) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	$ 111,528	$ 111,707
Gross unrealized gains	1,538	1,069
Gross unrealized losses	11,091	13,018
Allowance for Credit Losses	39	22
Fair Value	101,936	99,736
Corporate Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	88,713	89,249
Gross unrealized gains	1,139	787
Gross unrealized losses	9,377	11,004
Allowance for Credit Losses	27	9
Fair Value	80,448	79,023
U.S. Government Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	399	405
Gross unrealized gains	9	5
Gross unrealized losses	25	31
Fair Value	383	379
State And Municipal Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	5,386	5,410
Gross unrealized gains	279	172
Gross unrealized losses	408	512
Fair Value	5,257	5,070
Foreign Government Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	334	348
Gross unrealized gains	19	17
Gross unrealized losses	44	47
Fair Value	309	318
RMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	2,223	2,216
Gross unrealized gains	24	22
Gross unrealized losses	191	222
Allowance for Credit Losses	6	7
Fair Value	2,050	2,009
CMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	1,905	1,917
Gross unrealized gains	1	3
Gross unrealized losses	235	246
Fair Value	1,671	1,674
ABS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	12,205	11,797
Gross unrealized gains	42	38
Gross unrealized losses	784	926
Allowance for Credit Losses	5	5
Fair Value	11,458	10,904
Hybrid And Redeemable Preferred Securities [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	363	365
Gross unrealized gains	25	25
Gross unrealized losses	27	30
Allowance for Credit Losses	1	1
Fair Value	360	359
Fixed Maturity AFS Securities [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	111,528
Allowance for Credit Losses	39	22	$ 20	$ 19
Fair Value	101,936
Fixed Maturity AFS Securities [Member] \| Corporate Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Allowance for Credit Losses	27	9	16	17
Fixed Maturity AFS Securities [Member] \| RMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Allowance for Credit Losses	$ 6	$ 7	$ 2	$ 1