Income Taxes Income Taxes - Provision for Income Taxes Charged To Income From Continuing Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Provision for Income Taxes [Line Items]
Current Federal Tax Expense (Benefit)	$ 0	$ 0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(257)	(63)
Current Income Tax Expense (Benefit)	(2)	3
Deferred Foreign Income Tax Expense (Benefit)	(5)	(1)
Deferred Income Tax Expense (Benefit)	(5)	(1)
Income Tax Expense (Benefit)	(7)	2
Income (Loss) from Continuing Operations before Income Taxes, Foreign	(30)	22
Pre-tax income (loss)	(287)	(41)
Current State and Local Tax Expense (Benefit)	0	(4)
Current Foreign Tax Expense (Benefit)	$ (2)	$ 6