Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Gross Book Value	$ 6,414	$ 6,299
Accumulated Amortization	1,890	1,645
Net Book Value	4,524	4,654
Technology/Technical Know-How
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,776	1,747
Accumulated Amortization	623	535
Net Book Value	1,153	1,212
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,640	1,641
Accumulated Amortization	368	319
Net Book Value	1,272	1,322
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Book Value	2,534	2,531
Accumulated Amortization	623	523
Net Book Value	1,911	2,008
Other
Finite Lived Intangible Assets [Line Items]
Gross Book Value	464	380
Accumulated Amortization	276	268
Net Book Value	$ 188	$ 112