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Property, Plant and Equipment (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Depreciation and Amortization Excluding Acquisition-Related Intangibles Amortization $ 64.8 $ 57.0 $ 47.9
Capitalized Computer Software, Amortization 8.2 7.5 4.6
Repairs and maintenance expense $ 13.7 $ 12.9 $ 11.8