Debt (Receivables Facility) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016
Short-term Debt [Line Items]
Securitized accounts receivable	$ 914.2	$ 1,130.0
Short-term borrowings	1.3	46.4
Receivables Facility
Short-term Debt [Line Items]
Accounts receivable securitization facility maximum borrowing capacity		400.0
Short-term borrowings		$ 0.0
Debt Related Commitment Fees and Debt Issuance Costs	$ 1.5