Consolidated Balance Sheets Parenthetical (Parentheticals) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Series A Preferred Stock [Member]
Preferred stock, par or stated value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	0.1	0.1
Preferred stock, shares outstanding	0	0
Preferred Stock [Member]
Preferred stock, par or stated value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	10.0	10.0
Preferred stock, shares outstanding	0	0
Common Stock [Member]
Common stock, par or stated value per share	$ 0.01	$ 0.01
Common stock, shares authorized	150.0	150.0
Common stock, shares issued	81.9	81.6
Treasury stock, shares	6.1	6.0
Series Common Stock [Member]
Common stock, par or stated value per share	$ 0.01	$ 0.01
Common stock, shares authorized	40.0	40.0
Common stock, shares, outstanding	0	0

Face amount or stated value per share of common stock.

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