Restructuring and Other Charges - Restructuring Reserve Activity (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Restructuring and Related Activities [Abstract]    
Restructuring Reserve, beginning of period $ 7.8 $ 35.3
Liabilities incurred 3.1 5.1
Liabilities paid/settled (5.4) (23.4)
Restructuring Reserve, end of period $ 5.5 $ 17.0