Preliminary Values Allocated to Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Jan. 31, 2013	Jan. 14, 2013
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Intangible Assets		$ 571
Customer Related Intangible Assets
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Intangible Assets		460
Intangible Assets, Weighted average useful life	20 years
Acquired Software And Technology
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Intangible Assets		105
Intangible Assets, Weighted average useful life	7 years
Trade Names
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Intangible Assets		$ 6
Intangible Assets, Weighted average useful life	10 years