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Provision For Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Liability for Uncertainty in Income Taxes, Noncurrent $ 5  
Provision for income taxes (5) $ 5
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest (31) 11
Unrecognized Tax Benefits 13  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 6  
Jurisdictions where valuation allowances are maintained [Member]    
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest (52) (13)
Domestic Country And Foreign Country Witholding Taxes [Member]    
Liability for Uncertainty in Income Taxes, Noncurrent $ 3  
Deferred Tax Liabilities, Net   $ 12