Note 5 - Capital Stock (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended		4 Months Ended	10 Months Ended	11 Months Ended
	Dec. 07, 2012	Mar. 31, 2013	Mar. 31, 2012	Apr. 25, 2013	Oct. 27, 2011	Dec. 07, 2012
Stock Repurchase Program, Authorized Amount (in Dollars)					$ 500
Stock Repurchase Program, Remaining Authorized Repurchase Amount (in Dollars)		$ 453
Common Stock, Dividends, Per Share, Declared	$ 0.15		$ 0.14	$ 0.15		$ 0.14