Income Taxes Income Taxes - Provision for Income Taxes Charged To Income From Continuing Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 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	(50)	(57)	(306)	(121)
Current Income Tax Expense (Benefit)	3	28	1	31
Deferred Foreign Income Tax Expense (Benefit)	(1)	0	(6)	(1)
Deferred Income Tax Expense (Benefit)	(1)	0	(6)	(1)
Income Tax Expense (Benefit)	2	28	(4)	30
Income (Loss) from Continuing Operations before Income Taxes, Foreign	17	(43)	(13)	(21)
Pre-tax income (loss)	(33)	(100)	(320)	(141)
Current State and Local Tax Expense (Benefit)	0	0	0	(3)
Current Foreign Tax Expense (Benefit)	$ 3	$ 28	$ 1	$ 34