Long-term Debt - U.S. Bank Debt (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			9 Months Ended		3 Months Ended	9 Months Ended			12 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended				3 Months Ended
	Dec. 31, 2013 Revolving credit and term loan facilities [Member]	Dec. 31, 2012 Revolving credit and term loan facilities [Member]	Dec. 31, 2011 Revolving credit and term loan facilities [Member]	Oct. 15, 2013 Senior Secured Term Loan B [Member]	Oct. 10, 2012 Senior Secured Term Loan B [Member]	Dec. 31, 2013 Senior Secured Term Loan A [Member]	Oct. 15, 2013 Senior Secured Term Loan A [Member]	Dec. 31, 2013 U.S. bank debt and receivables facility [Member]	Dec. 31, 2012 U.S. bank debt and receivables facility [Member]	Dec. 31, 2013 Receivables Facility [Member]	Dec. 31, 2012 Receivables Facility [Member]	Dec. 31, 2013 Senior Secured Term Loan A [Member]	Oct. 15, 2013 Senior Secured Term Loan A [Member]	Oct. 15, 2013 Senior Secured Term Loan B [Member]	Dec. 31, 2013 Revolving credit facility [Member]	Oct. 15, 2013 Revolving credit facility [Member]	Dec. 31, 2012 Revolving credit facility [Member]	Dec. 31, 2013 Letters of credit [Member]	Dec. 31, 2012 Letters of credit [Member]	Dec. 31, 2013 Principal payment, March 2014 through December 2016 [Member] Senior Secured Term Loan A [Member]	Dec. 31, 2013 Principal payment, March 2017 through December 2018 [Member] Senior Secured Term Loan A [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount												$ 175.0	$ 200.0	$ 200.0
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases															75.0
Interest rate, LIBOR plus				2.75%			2.00%			1.35%		1.625%			1.625%	2.00%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum				1.00%
Line of Credit Facility, Maximum Borrowing Capacity															575.0	250.0		75.0
Debt Instrument, Maturity Date												Oct. 16, 2018	Oct. 11, 2017	Oct. 11, 2019	Oct. 16, 2018	Oct. 11, 2017
Incremental debt commitments capacity	300
Term Loan Facility, Required Prepay Portion Under Excess Cash Flow Sweep Provision [Line Items]					5.0
Letters of Credit Outstanding, Amount																		24.1	23.3
Revolving Credit Facility, Amount Outstanding															71.1		0
Revolving Credit Facility, Remaining Borrowing Capacity															479.8		226.7
Debt Instrument, Unused Borrowing Capacity, Amount								360.3	230.5	20.2	51.9
Term Loan Facility, Quarterly Principal Payments																				2.2	3.3
Term Loan Facility, Principal Payment on Maturity Date						125.8
Payments of Debt Extinguishment and Issuance Costs	3.6	6.4	6.8
Deferred Finance Costs, Noncurrent, Net	3.1	4.5	4.4
Debt Issuance Cost	0.5	1.9	2.4
Write off of Deferred Debt Issuance Cost	$ 1.9	$ 1.1	$ 1.6