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Fair Value Measurements - Assets and Liabilities Table (Details) - USD ($)
$ in Millions
Sep. 30, 2016
Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value, Net Asset (Liability) $ (1) $ (1)
Other Current Assets [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other Current Assets, Fair Value Disclosure 48 50
Other Current Liabilities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other Current Liabilities, Fair Value Disclosure (49) (51)
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value, Net Asset (Liability) (1) (1)
Fair Value, Inputs, Level 1 [Member] | Other Current Assets [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other Current Assets, Fair Value Disclosure 48 50
Fair Value, Inputs, Level 1 [Member] | Other Current Liabilities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other Current Liabilities, Fair Value Disclosure (49) (51)
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value, Net Asset (Liability) 0 0
Fair Value, Inputs, Level 2 [Member] | Other Current Assets [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other Current Assets, Fair Value Disclosure 0 0
Fair Value, Inputs, Level 2 [Member] | Other Current Liabilities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other Current Liabilities, Fair Value Disclosure 0 0
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value, Net Asset (Liability) 0 0
Fair Value, Inputs, Level 3 [Member] | Other Current Assets [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other Current Assets, Fair Value Disclosure 0 0
Fair Value, Inputs, Level 3 [Member] | Other Current Liabilities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other Current Liabilities, Fair Value Disclosure $ 0 $ 0