Federal Income Taxes (Reconciliation Of The Effective Tax Rate Differences) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of effective tax rate differences [Abstract]
Income (loss) before taxes	$ 1,638	$ 423	$ 919
Federal statutory rate	21.00%	21.00%	21.00%
Federal income tax expense (benefit) at federal statutory rate	$ 344	$ 89	$ 193
Effect of:
Tax-preferred investment income	(88)	(98)	(99)
Tax credits	(26)	(39)	(40)
Excess tax benefits from share-based compensation		3	(9)
Tax impact associated with the Tax Cuts and Jobs Act		(37)	(17)
Other items	3	6	5
Federal income tax expense (benefit)	$ 233	$ (76)	$ 33
Effective tax rate	14.00%	(18.00%)	4.00%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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