Note 15 - Stock Repurchase Programs (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended								1 Months Ended	12 Months Ended	4 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Stock Repurchase Programs [Member]		Dec. 31, 2011 Stock Repurchase Programs [Member]		Sep. 30, 2010 Stock Repurchase Program 2010 [Member]	Dec. 31, 2012 Stock Repurchase Programs, Combined [Member]	Sep. 30, 2012 Stock Repurchase Program 2012 [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired										22
Amount authorized under stock repurchase program									$ 2,000,000,000		$ 2,000,000,000
Shares Repurchased [Abstract]
Shares repurchased, beginning balance					35
Shares repurchased, ending balance					57		35
Treasury stock acquired under stock repurchase program, average price per share	$ 35.00	[1]			$ 40.50	[1]	$ 31.55	[1]
Stock Repurchased Value [Roll Forward]
Treasury Stock Value of Shares Repurchased					1,119,000,000
Repurchase of common stock					898,000,000
Treasury Stock Value of Shares Repurchased					2,017,000,000		1,119,000,000
Stock Repurchase Remaining Authorized Amount [Roll Forward]
Stock Repurchase remaining amount authorized, beginning balance					1,983,000,000		881,000,000
Repurchases of common stock	(898,000,000)		(1,064,000,000)	(711,000,000)	(898,000,000)
Stock Repurchase remaining amount authorized, ending balance					$ 1,983,000,000		$ 881,000,000

[1] Stock repurchase activity excludes broker commissions.