Income Taxes - Components of Current and Deferred Portions of Provision for Income Taxes on Continuing Operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current income tax provision:
Federal	$ 197	$ 77	$ 240
State and local	21	26	25
Foreign	44	69	54
Subtotal	262	172	319
Deferred income tax provision:
Federal	93	97	72
State and local	9	15	27
Foreign	10	12	10
Subtotal	112	124	109
Total provision for income taxes	$ 374	$ 296	$ 428