Note 9 - Equity (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended		60 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Jan. 31, 2011
Stock Repurchase Program, Authorized Amount			$ 8
Treasury Stock, Value, Acquired, Cost Method	$ 2	$ 7
Treasury Stock, Shares, Acquired (in Shares)	0.1
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 36.25