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Debt and Other Credit Facilities (Schedule of Outstanding Debt) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Total long-term debt $ 1,210 $ 1,248
Less: current portion 27 22
Total long-term debt, net of current portion 1,183 1,226
Term Loan A    
Debt Instrument [Line Items]    
Unamortized debt issuance costs (4) (5)
Term Loan B    
Debt Instrument [Line Items]    
Unamortized debt issuance costs (15) (18)
Secured Debt | Term Loan A    
Debt Instrument [Line Items]    
Long-term debt 176 190
Total long-term debt 350  
Secured Debt | Term Loan B    
Debt Instrument [Line Items]    
Long-term debt 756 796
Total long-term debt 800  
Convertible Debt    
Debt Instrument [Line Items]    
Long-term debt 350 350
Unamortized debt issuance costs $ (53) $ (65)