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Subsequent Events (Details)
€ / shares in Units, $ in Millions, € in Billions
3 Months Ended
Apr. 08, 2019
EUR (€)
€ / shares
Apr. 08, 2019
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Mar. 01, 2019
USD ($)
Subsequent Event [Line Items]          
Payment for acquisition     $ 152 $ 0  
Linde AG | Squeeze-Out Transaction | Subsequent Event          
Subsequent Event [Line Items]          
Business Acquisition, Share Price | € / shares € 189.46        
Payment for acquisition € 2.8 $ 3,200      
Linde Korea Divestiture | Discontinued Operations, Disposed of by Sale          
Subsequent Event [Line Items]          
Consideration paid         $ 1,200