Income Taxes Income Taxes - Provision for Income Taxes Charged To Income From Continuing Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Provision for Income Taxes [Line Items]
Current Federal Tax Expense (Benefit)	$ 0	$ 0	$ 0	$ 0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(106)	60	(412)	(61)
Current Income Tax Expense (Benefit)	(1)	4	1	35
Deferred Foreign Income Tax Expense (Benefit)	1	(1)	(5)	(2)
Deferred Income Tax Expense (Benefit)	1	(1)	(5)	(2)
Income Tax Expense (Benefit)	0	3	(5)	33
Income (Loss) from Continuing Operations before Income Taxes, Foreign	(2)	9	(15)	(11)
Pre-tax income (loss)	(108)	69	(427)	(72)
Current State and Local Tax Expense (Benefit)	0	0	0	(3)
Current Foreign Tax Expense (Benefit)	$ (1)	$ 4	$ 0	$ 38