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Income Taxes (Components of Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal:
Current	$ (8)	$ (7)	$ 7
Deferred	(17)	(4)	186
State:
Current	0	(1)	2
Deferred	2	0	5
Foreign:
Current	458	368	378
Deferred	$ (219)	$ (4)	$ 130

X

- Definition

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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