Income Taxes, Benefit From (Provision For) Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current portion of income tax provision:
Federal	$ (12)	$ (2)	$ 2
State	(20)	(18)	(31)
Foreign	0	(2)	(1)
Total current portion	(32)	(22)	(30)
Deferred portion of income tax provision:
Federal	17	(20)	(27)
State	(29)	(40)	(13)
Foreign	0	0	0
Total deferred portion	(12)	(60)	(40)
Total provision for income taxes	$ (44)	$ (82)	$ (70)

Amount of current federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current national tax expense (benefit) for non-US (United States of America) jurisdiction.

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