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Investments (Reconciliation Of Available-For-Sale Securities From Cost Basis To Fair Value) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	$ 107,622	$ 105,177
Allowance for Credit Losses	20	19
Fair Value	110,695	118,746
Fixed Maturity AFS Securities [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	107,622	105,177
Gross unrealized gains	6,091	14,039
Gross unrealized losses	2,998	451
Allowance for Credit Losses	20	19	$ 14	$ 13
Fair Value	110,695	118,746
Fixed Maturity AFS Securities [Member] | Corporate Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	88,091	86,373
Gross unrealized gains	4,983	12,113
Gross unrealized losses	2,497	349
Allowance for Credit Losses	16	17	13	12
Fair Value	90,561	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	392	375
Gross unrealized gains	31	60
Gross unrealized losses	5	2
Fair Value	418	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	5,380	5,322
Gross unrealized gains	775	1,311
Gross unrealized losses	154	12
Fair Value	6,001	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	358	373
Gross unrealized gains	43	64
Gross unrealized losses	18	5
Fair Value	383	432
Fixed Maturity AFS Securities [Member] | RMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	2,290	2,334
Gross unrealized gains	92	196
Gross unrealized losses	42	4
Allowance for Credit Losses	2	1	$ 1	$ 1
Fair Value	2,338	2,525
Fixed Maturity AFS Securities [Member] | CMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	1,656	1,552
Gross unrealized gains	8	61
Gross unrealized losses	72	14
Fair Value	1,592	1,599
Fixed Maturity AFS Securities [Member] | ABS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	9,046	8,439
Gross unrealized gains	73	127
Gross unrealized losses	189	54
Allowance for Credit Losses	1
Fair Value	8,929	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	409	409
Gross unrealized gains	86	107
Gross unrealized losses	21	11
Allowance for Credit Losses	1	1
Fair Value	$ 473	$ 504

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