Factoring of Accounts Receivable - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Total Factored [Member]
Factoring of Accounts Receivable [Line Items]
Accounts receivable sold without recourse	$ 133.1	$ 131.1	$ 265.2	$ 270.1
Factoring Fees [Member]
Factoring of Accounts Receivable [Line Items]
Accounts receivable sold without recourse	$ 0.8	$ 0.5	$ 1.5	$ 0.9