Capital Stock (Details Textuals) (USD $) In Millions, except Share data	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Capital Stock (Textuals) [Abstract]
Authorized capital stock	485,000,000
Common stock, shares authorized	475,000,000	475,000,000
Preferred stock, shares authorized	10,000,000	10,000,000
Repurchase of common stock, approved total	$ 10.0
Remaining common stock, under authorization	$ 6.8