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Related-Party Transactions (Details) - USD ($)
6 Months Ended 12 Months Ended
Dec. 31, 2016
Jul. 01, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Related Party Transaction [Line Items]          
Related Party Transaction, Expenses from Transactions with Related Party   $ 117,000,000   $ 201,000,000 $ 197,000,000
Revenue from Related Parties $ 11,000,000   $ 31,000,000 $ 38,000,000 $ 39,000,000
Related Party Transaction, Purchases from Related Party 10,000,000        
Corporate Overhead Allocated $ 0        
Related Party, License Agreement, Improvement License, Terms     2 years    
TSA Expenses [Member]          
Related Party Transaction [Line Items]          
Related Party Transaction, Expenses from Transactions with Related Party     $ 13,000,000