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Supplemental Cash Flow Information (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Supplemental Cash Flow Elements [Abstract]      
Cash paid for interest $ 4.8 $ 5.1 $ 5.2
Cash paid for income taxes 130.1 95.2 75.6
Non-cash item in deferred tax liabilities and intangibles in conjunction with acquisition   7.0  
NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1 $ 9.2 $ 5.5