CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Millions, except Share data, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
CONSOLIDATED BALANCE SHEETS    
Current assets held for sale $ 23.1  
Assets held for sale 105.2  
Current liabilities held for sale 3.1  
Liabilities held for sale $ 6.6  
Preferred stock shares, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock shares, authorized 50,000,000 50,000,000
Preferred stock shares, issued 0 0
Preferred stock shares, outstanding 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 450,000,000 450,000,000
Common stock, shares issued 149,550,933 148,545,150
Common stock, shares outstanding 148,479,822 147,538,519
Treasury stock shares 1,071,111 1,006,631