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Acquisitions - Summary of Amounts Recognized for Assets and Liabilities Acquired (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2016
USD ($)
Business Acquisition [Line Items]  
Net cash outflow $ 1,810
Getrag Group Of Companies [Member]  
Business Acquisition [Line Items]  
Cash 136
Non-cash working capital (395)
Investments 1,497
Fixed assets 445
Goodwill 590
Other assets 24
Intangibles 372
Deferred tax assets 34
Long-term employee benefit liabilities (137)
Long-term debt (117)
Other long-term liabilities (52)
Deferred tax liabilities (119)
Non-controlling interest (287)
Consideration paid 1,991
Less: Cash acquired (136)
Net cash outflow $ 1,855