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Acquisitions and Divestitures (Purchase Price Allocation) (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Jan. 31, 2018
Dec. 31, 2017
Oct. 31, 2016
Business Acquisition [Line Items]        
Goodwill $ 3,082   $ 2,768  
Pure Technologies Ltd        
Business Acquisition [Line Items]        
Cash   $ 14    
Receivables   24    
Inventories   5    
Prepaid and other current assets   1    
Property, plant and equipment   22    
Intangible assets   148   $ 148
Other long-term assets   4    
Accounts payable   (3)    
Accrued and other current liabilities   (12)    
Deferred income tax liabilities   (29)    
Other non-current accrued liabilities   (2)    
Total identifiable net assets   172    
Goodwill   262    
Total consideration   $ 434