Note 10 - Stock Repurchase Programs (Details) (USD $)	6 Months Ended			12 Months Ended	6 Months Ended	1 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Stock Repurchase Programs [Member]	Dec. 31, 2011 Stock Repurchase Programs [Member]	Jun. 30, 2012 Stock Repurchase Program 2010 [Member]	Jun. 30, 2012 Stock Repurchase Program 2012 [Member]	Jun. 30, 2012 Stock Repurchase Program 2012 [Member]
Equity, Class of Treasury Stock [Line Items]
Amount authorized under stock repurchase program					$ 2,000,000,000	$ 2,000,000,000	$ 2,000,000,000
Shares Repurchased [Roll Forward]
Shares repurchased, beginning balance			35,000,000
Shares repurchased			16,000,000
Shares repurchased, ending balance			51,000,000	35,000,000
Treasury stock acquired under stock repurchase program, average price per share	$ 33.30		$ 37.16	$ 31.55
Stock Repurchased Value [Roll Forward]
Treasury Stock Value of Shares Repurchased			1,119,000,000
Repurchase of common stock			595,000,000
Treasury Stock Value of Shares Repurchased			1,714,000,000	1,119,000,000
Stock Repurchase Remaining Authorized Amount [Roll Forward]
Stock Repurchase remaining amount authorized, beginning balance			2,286,000,000	881,000,000
Repurchases of common stock	(595,000,000)	(781,000,000)	(595,000,000)
Stock Repurchase remaining amount authorized, ending balance			$ 2,286,000,000	$ 881,000,000
Repurchased shares retired during the period			0