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Other (Income) Expense - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Jul. 01, 2018
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Apr. 30, 2017
Other (Income) Expense [Line Items]            
Assets (liabilities) transferred to joint venture $ 6,000,000          
Fair value of equity investment 292,000,000          
Gain (loss) on investments $ 286,000,000 $ 287,000,000 $ 0 $ 273,000,000 $ 0  
Professional fees   (1,000,000)   13,000,000    
Other (Income) Expense   (253,000,000) 30,000,000 (171,000,000) 54,000,000  
Insurance deductible   $ 2,000,000 $ 12,000,000 12,000,000 12,000,000  
7% Senior Notes Due 2022 | Senior Notes            
Other (Income) Expense [Line Items]            
Payment for debt extinguishment or debt prepayment cost         $ 25,000,000  
Debt instrument, face amount           $ 700,000,000
Interest rate, stated percentage           7.00%
Accounting Standards Update, Pension and Postretirement Benefits Cost | Restatement Adjustment            
Other (Income) Expense [Line Items]            
Other (Income) Expense       $ 9,000,000