Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Intangible Assets By Major Class [Line Items]
Gross Book Value	$ 6,432	$ 6,305
Accumulated Amortization	1,742	1,596
Net Book Value	4,690	4,709
Technology/Technical Know-How
Intangible Assets By Major Class [Line Items]
Gross Book Value	1,960	1,960
Accumulated Amortization	681	597
Net Book Value	1,279	1,363
Tradenames
Intangible Assets By Major Class [Line Items]
Gross Book Value	1,640	1,647
Accumulated Amortization	301	257
Net Book Value	1,339	1,390
Customer Relationships
Intangible Assets By Major Class [Line Items]
Gross Book Value	2,460	2,263
Accumulated Amortization	493	407
Net Book Value	1,967	1,856
Other
Intangible Assets By Major Class [Line Items]
Gross Book Value	372	435
Accumulated Amortization	267	335
Net Book Value	$ 105	$ 100