Note 6 - Capital Stock (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended		6 Months Ended			1 Months Ended
	Apr. 24, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Oct. 27, 2011	Jul. 22, 2014 Subsequent Event [Member]
Note 6 - Capital Stock (Details) [Line Items]
Stock Repurchase Program, Authorized Amount						$ 500
Stock Repurchase Program, Remaining Authorized Repurchase Amount		263		263
Treasury Stock, Shares, Acquired (in Shares)		990,000
Treasury Stock, Value, Acquired		$ 75
Common Stock, Dividends, Per Share, Declared (in Dollars per share)	$ 0.20	$ 0.20	$ 0.15	$ 0.40	$ 0.15		$ 0.20