Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Estimated amortization charged to income, 2018	$ 677
Estimated amortization charged to income, 2019	673
Estimated amortization charged to income, 2020	638
Estimated amortization charged to income, 2021	616
Estimated amortization charged to income, 2022	608
Amortization expense	$ 663	$ 567	$ 354
Customer Relationships | Minimum
Finite Lived Intangible Assets [Line Items]
Amortization period	18 years
Customer Relationships | Maximum
Finite Lived Intangible Assets [Line Items]
Amortization period	28 years
Technology/Technical Know-How | Minimum
Finite Lived Intangible Assets [Line Items]
Amortization period	10 years
Technology/Technical Know-How | Maximum
Finite Lived Intangible Assets [Line Items]
Amortization period	18 years
Tradenames | Minimum
Finite Lived Intangible Assets [Line Items]
Amortization period	15 years
Tradenames | Maximum
Finite Lived Intangible Assets [Line Items]
Amortization period	30 years