Cash Flow Information - Schedule of Cash Paid for Acquisitions (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Combinations [Abstract]
Assets acquired			$ 253
Liabilities assumed			(12)
Cash paid			241
Less: cash acquired			1
Net cash paid			$ 240