Note 6 - Capital Stock (Details) (USD $)	0 Months Ended		3 Months Ended		9 Months Ended			0 Months Ended
	Aug. 15, 2014	Jul. 22, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Oct. 27, 2011	Oct. 29, 2014 Subsequent Event [Member]
Note 6 - Capital Stock (Details) [Line Items]
Stock Repurchase Program, Authorized Amount							$ 500,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount			263,000,000		263,000,000
Treasury Stock, Shares, Acquired			0
Treasury Stock, Value, Acquired			$ 0
Common Stock, Dividends, Per Share, Declared		$ 0.20	$ 0.20	$ 0.15	$ 0.60	$ 0.30		$ 0.20
Common Stock, Dividends, Per Share, Cash Paid	$ 0.20