Income Tax Provision (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components Of Income Tax Expense Benefit [Line Items]
Current, Federal	$ 290	$ 250	$ 199
Current, State	35	36	18
Current, Foreign	12	9	8
Current income tax provision	337	295	225
Deferred, Federal	(12)	3	21
Deferred, State	1		5
Deferred, Foreign	2	2	3
Deferred income taxes	(9)	5	29
Income tax provision	$ 328	$ 300	$ 254