Long-term Debt - U.S. Bank Debt (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Net leverage ratio	2.50
U.S. bank debt and receivables facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount	$ 356.4	$ 360.3
Revolving credit and term loan facilities [Member]
Debt Instrument [Line Items]
Incremental debt commitments capacity	300.0
Senior Secured Term Loan A [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Debt Instrument, Face Amount	175.0
Revolving credit facility [Member]
Debt Instrument [Line Items]
Revolving Credit Facility, Maximum Borrowing Capacity	575.0
Revolving Credit Facility, Capacity Available for Foreign Revolver Loans	75.0
Debt Instrument, Basis Spread on Variable Rate	1.50%
Revolving Credit Facility, Amount Outstanding	102.3	71.1
Revolving Credit Facility, Remaining Borrowing Capacity	448.6	479.8
Letters of credit [Member]
Debt Instrument [Line Items]
Letters of Credit, Maximum Borrowing Capacity	75.0
Letters of Credit Outstanding, Amount	$ 24.1	$ 24.1
Fair Value, Inputs, Level 2 [Member] | Senior Secured Term Loan A [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value, % of par value	99.60%	99.80%