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Investments (Reconciliation Of Available-For-Sale Securities From Cost Basis To Fair Value) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	$ 111,707	$ 111,058	$ 109,592	$ 107,587	$ 105,142	$ 107,459	$ 106,668	$ 105,866
Allowance for Credit Losses	22	18	12	20	19	17	9	14
Fair Value	99,736	$ 97,572	$ 103,317	$ 110,663	118,711	$ 122,085	$ 122,215	$ 117,313
Fixed Maturity AFS Securities [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	111,707				105,142
Gross unrealized gains	1,069				14,039
Gross unrealized losses	13,018				451
Allowance for Credit Losses	22				19				$ 13
Fair Value	99,736				118,711
Fixed Maturity AFS Securities [Member] | Corporate Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	89,249				86,373
Gross unrealized gains	787				12,113
Gross unrealized losses	11,004				349
Allowance for Credit Losses	9				17				12
Fair Value	79,023				98,120
Fixed Maturity AFS Securities [Member] | U.S. Government Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	405				375
Gross unrealized gains	5				60
Gross unrealized losses	31				2
Fair Value	379				433
Fixed Maturity AFS Securities [Member] | State And Municipal Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	5,410				5,322
Gross unrealized gains	172				1,311
Gross unrealized losses	512				12
Fair Value	5,070				6,621
Fixed Maturity AFS Securities [Member] | Foreign Government Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	348				373
Gross unrealized gains	17				64
Gross unrealized losses	47				5
Fair Value	318				432
Fixed Maturity AFS Securities [Member] | RMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	2,216				2,334
Gross unrealized gains	22				196
Gross unrealized losses	222				4
Allowance for Credit Losses	7				1				$ 1
Fair Value	2,009				2,525
Fixed Maturity AFS Securities [Member] | CMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	1,917				1,552
Gross unrealized gains	3				61
Gross unrealized losses	246				14
Fair Value	1,674				1,599
Fixed Maturity AFS Securities [Member] | ABS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	11,797				8,439
Gross unrealized gains	38				127
Gross unrealized losses	926				54
Allowance for Credit Losses	5
Fair Value	10,904				8,512
Fixed Maturity AFS Securities [Member] | Hybrid And Redeemable Preferred Securities [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	365				374
Gross unrealized gains	25				107
Gross unrealized losses	30				11
Allowance for Credit Losses	1				1
Fair Value	$ 359				$ 469

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