Schedule II - Valuation and Qualifying Accounts (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 77	$ 71	$ 91
Charged to Costs and Expenses	33	24	31
Deductions	(36)	(18)	(51)
Balance at End of Year	74	77	71
United Kingdom Subsidiary
Movement in Valuation Allowances and Reserves [Roll Forward]
Deductions			$ (9)