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Impairment and Restructuring Charges (Details 1) (USD $)
In Millions, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Roll Forward consolidated restructuring accrual    
Beginning Balance $ 17.6 $ 21.8
Expense 2.7 12.2
Payments (8.3) (16.4)
Ending Balance $ 12.0 $ 17.6