Accounts Receivable Financing - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts Notes And Loans Receivable [Line Items]
Amount of total outstanding accounts receivable under a financing arrangement	$ 232.6	$ 194.4	$ 123.4
Amount due from the financing company	32.7	28.5
Fees incurred pursuant to the factoring agreement	3.4	2.6	1.8
Transfer of Financial Assets Under Financing Arrangement
Accounts Notes And Loans Receivable [Line Items]
Amount of total outstanding accounts receivable under a financing arrangement	139.4	136.0	$ 109.4
Amount due from the financing company	$ 22.1	$ 20.2