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Short-term Borrowings and Other Debt Obligations Schedule of Short-term Debt (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Jun. 30, 2017
Jun. 26, 2017
Dec. 31, 2016
Short-term Debt [Line Items]        
Current Portion of Long-term Debt $ 137     $ 177
Short-term Borrowings and Current Portion of Long-term Debt 148     179
Other short-term bank loans [Member]        
Short-term Debt [Line Items]        
Short-term Debt 11     2
Long-term Debt, Current Maturities 137     177
Short-term Borrowings and Current Portion of Long-term Debt $ 148     $ 179
Senior Notes, 9.875% due 2024 [Member]        
Short-term Debt [Line Items]        
Long-term Debt   $ 540 $ 250  
Senior Notes [Member] | Senior Notes, 9.875% due 2024 [Member]        
Short-term Debt [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage     9.875%  
London Interbank Offered Rate (LIBOR) [Member] | A&R Credit Agreement [Member]        
Short-term Debt [Line Items]        
Debt Instrument, Basis Spread on Variable Rate 2.80%