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Derivative Instruments - Textuals (Details)
MMBTU in Millions
12 Months Ended
Dec. 22, 2015
USD ($)
Dec. 31, 2017
USD ($)
MMBTU
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Derivative Instruments, Gain (Loss) [Line Items]        
Net liability position of derivatives   $ 15,000,000    
Collateral provided to counterparties related to derivatives   $ 13,000,000    
Foreign exchange contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain reclassified from AOCI to earnings $ 1,000,000      
Foreign exchange contracts | Derivatives in Net Investment Hedging Relationships        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of FX Instruments       $ 35,000,000
Commodity contracts | Derivatives Designated as Hedging Instruments        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of Commodity Instruments (in mmBTUs) | MMBTU   38    
Loss on cash flow hedge ineffectiveness   $ 0 $ 0 $ 0
Purchases of products and services | Foreign exchange contracts | Derivatives Designated as Hedging Instruments        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of FX Instruments   $ 95,000,000