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Income Taxes Income Taxes - Provision for Income Taxes Charged To Income From Continuing Operations (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Provision for Income Taxes [Line Items]    
Current Federal Tax Expense (Benefit) $ 0 $ 0
Income (Loss) from Continuing Operations before Income Taxes, Domestic 17 (257)
Current Income Tax Expense (Benefit) 5 (2)
Deferred Foreign Income Tax Expense (Benefit) (3) (5)
Deferred Income Tax Expense (Benefit) (3) (5)
Income Tax Expense (Benefit) 2 (7)
Income (Loss) from Continuing Operations before Income Taxes, Foreign 2 (30)
Pre-tax income (loss) 19 (287)
Current State and Local Tax Expense (Benefit) 2 0
Current Foreign Tax Expense (Benefit) $ 3 $ (2)