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Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Earnings (loss) from continuing operations before income taxes	$ 964	$ (193)	$ 1,236	$ (2,980)
Current income tax expense (benefit)	1	(90)	15	(199)
Deferred income tax expense (benefit)	119		(100)	(311)
Total income tax expense (benefit)	$ 120	$ (90)	$ (85)	$ (510)

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