Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Current:
Federal	$ (28)	$ (6)
State	1	0
Total	(27)	(6)
Deferred:
Federal	(134)	61
State	(43)	14
Total	(177)	75
Provision (benefit) for income taxes	$ (204)	$ 69

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

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