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Debt and Capital Lease Obligations (Non-cash Financing Transactions) (Narrative) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Debt and Capital Lease Obligations [Abstract]    
Refinancing transactions, aggregate borrowings and repayments of debt $ 7,731.2 $ 205.2