Schedule Of Details Of Dividend Payments (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Stockholders Equity Note [Line Items]
Record Date	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011
Payment Date	Jul. 27, 2012	Apr. 27, 2012	Jan. 31, 2012
Amount per Share	$ 0.26	$ 0.25	$ 0.25
Total Amount	$ 42	$ 41	$ 41