Income Taxes Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 9	$ 12	$ 4
State and local	12	22	12
Current Income Tax Expense (Benefit)	21	34	16
Deferred:
Federal	(2)	(15)	61
State and local	8	(2)	9
deferred income tax expense	6	(17)	70
Income tax expense	$ 27	$ 17	$ 86