v2.4.0.6
Other Assets (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Prepaid Expenses and Other Current Assets    
Inventories $ 35.1 $ 34.5
Prepaid expenses 58.0 54.4
Other non-trade receivables 33.8 39.6
Income tax receivable 18.6 69.0
Commodity and fuel hedge asset 5.4 4.1
Other current assets 2.2 7.7
Total $ 153.1 $ 209.3