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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	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 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	$ 109,647		$ 105,177
Gross unrealized gains	2,282		14,039
Gross unrealized losses	8,552		451
Allowance for Credit Losses	12	$ 20	19	$ 9	$ 14	$ 13
Fair Value	103,365		118,746
Corporate Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	88,791		86,373
Gross unrealized gains	1,648		12,113
Gross unrealized losses	7,274		349
Allowance for Credit Losses	7	16	17	8	13	12
Fair Value	83,158		98,120
U.S. Government Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	415		375
Gross unrealized gains	14		60
Gross unrealized losses	14		2
Fair Value	415		433
State And Municipal Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	5,422		5,322
Gross unrealized gains	421		1,311
Gross unrealized losses	320		12
Fair Value	5,523		6,621
Foreign Government Bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	361		373
Gross unrealized gains	26		64
Gross unrealized losses	39		5
Fair Value	348		432
RMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	2,241		2,334
Gross unrealized gains	51		196
Gross unrealized losses	107		4
Allowance for Credit Losses	3	$ 2	1	$ 1	$ 1	$ 1
Fair Value	2,182		2,525
CMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	1,708		1,552
Gross unrealized gains	2		61
Gross unrealized losses	153		14
Fair Value	1,557		1,599
ABS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	10,274		8,439
Gross unrealized gains	47		127
Gross unrealized losses	610		54
Allowance for Credit Losses	1
Fair Value	9,710		8,512
Hybrid And Redeemable Preferred Securities [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized Cost	435		409
Gross unrealized gains	73		107
Gross unrealized losses	35		11
Allowance for Credit Losses	1		1
Fair Value	$ 472		$ 504