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Condensed Consolidated Statements of Cash Flows (Parenthetical) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Statement of Cash Flows [Abstract]    
Capital Expenditures Incurred but Not yet Paid $ 11.7 $ 3.8
Interest Paid, Net 9.3 2.6
Income Taxes Paid, Net $ 27.3 $ 6.9