Acquisitions and Divestitures - Preliminary Purchase Price Allocation of Other Intangible Assets (Detail) (RCI Environnement Inc [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	$ 169
Total other intangible assets subject to amortization, Weighted average amortization period	14 years 7 months 6 days
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	162
Total other intangible assets subject to amortization, Weighted average amortization period	15 years
Trade Name [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	$ 7
Total other intangible assets subject to amortization, Weighted average amortization period	5 years