Supplemental Guarantor Information -Condensed Consolidating Statements of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	$ 304.7	$ 129.8
Capital expenditures	(15.7)	(16.7)
Cash settlements on interest rate swap agreements	0	(6.6)
Premium payments on interest rate cap agreements	0	(3.2)
Net cash used in investing activities	(15.7)	(26.5)
Proceeds from borrowings under revolving credit facility	256.0	755.0
Repayments of borrowings under revolving credit facility	(256.0)	(783.1)
Repayments of senior secured term loan facility	(201.0)	(132.0)
Proceeds from issuance of Senior Notes	135.7	1,175.0
Payments to extinguish Senior Notes	(136.9)	(1,175.0)
Net change in accounts payable-inventory financing	(25.5)	89.9
Net cash used in financing activities	(230.1)	(95.7)
Effect of exchange rate changes on cash and cash equivalents	(0.1)	0.4
Net increase in cash and cash equivalents	58.8	8.0
Cash and cash equivalents - beginning of period	99.9	36.6
Cash and cash equivalents - end of period	158.7	44.6
Parent Guarantor [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	0	0
Capital expenditures	0	0
Cash settlements on interest rate swap agreements		0
Premium payments on interest rate cap agreements		0
Net cash used in investing activities	0	0
Proceeds from borrowings under revolving credit facility	0	0
Repayments of borrowings under revolving credit facility	0	0
Repayments of senior secured term loan facility	0	0
Proceeds from issuance of Senior Notes	0	0
Payments to extinguish Senior Notes	0	0
Net change in accounts payable-inventory financing	0	0
Advances from (to) affiliates	0	0
Other financing activities	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents - beginning of period	0	0
Cash and cash equivalents - end of period	0	0
Subsidiary Issuer [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	(118.3)	(63.7)
Capital expenditures	(8.8)	(12.1)
Cash settlements on interest rate swap agreements		(6.6)
Premium payments on interest rate cap agreements		(3.2)
Net cash used in investing activities	(8.8)	(21.9)
Proceeds from borrowings under revolving credit facility	256.0	755.0
Repayments of borrowings under revolving credit facility	(256.0)	(783.1)
Repayments of senior secured term loan facility	(201.0)	(132.0)
Proceeds from issuance of Senior Notes	135.7	1,175.0
Payments to extinguish Senior Notes	(136.9)	(1,175.0)
Net change in accounts payable-inventory financing	0	0
Advances from (to) affiliates	371.8	292.3
Other financing activities	(2.4)	(25.5)
Net cash used in financing activities	167.2	106.7
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase in cash and cash equivalents	40.1	21.1
Cash and cash equivalents - beginning of period	102.1	32.9
Cash and cash equivalents - end of period	142.2	54.0
Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	410.6	206.5
Capital expenditures	(6.5)	(4.6)
Cash settlements on interest rate swap agreements		0
Premium payments on interest rate cap agreements		0
Net cash used in investing activities	(6.5)	(4.6)
Proceeds from borrowings under revolving credit facility	0	0
Repayments of borrowings under revolving credit facility	0	0
Repayments of senior secured term loan facility	0	0
Proceeds from issuance of Senior Notes	0	0
Payments to extinguish Senior Notes	0	0
Net change in accounts payable-inventory financing	(25.5)	89.9
Advances from (to) affiliates	(372.3)	(292.3)
Other financing activities	0	0
Net cash used in financing activities	(397.8)	(202.4)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase in cash and cash equivalents	6.3	(0.5)
Cash and cash equivalents - beginning of period	15.8	1.1
Cash and cash equivalents - end of period	22.1	0.6
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	13.1	(3.8)
Capital expenditures	(0.4)	0
Cash settlements on interest rate swap agreements		0
Premium payments on interest rate cap agreements		0
Net cash used in investing activities	(0.4)	0
Proceeds from borrowings under revolving credit facility	0	0
Repayments of borrowings under revolving credit facility	0	0
Repayments of senior secured term loan facility	0	0
Proceeds from issuance of Senior Notes	0	0
Payments to extinguish Senior Notes	0	0
Net change in accounts payable-inventory financing	0	0
Advances from (to) affiliates	0.5	0
Other financing activities	0	0
Net cash used in financing activities	0.5	0
Effect of exchange rate changes on cash and cash equivalents	(0.1)	0.4
Net increase in cash and cash equivalents	13.1	(3.4)
Cash and cash equivalents - beginning of period	8.1	10.0
Cash and cash equivalents - end of period	21.2	6.6
Co-Issuer [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	0	0
Capital expenditures	0	0
Cash settlements on interest rate swap agreements		0
Premium payments on interest rate cap agreements		0
Net cash used in investing activities	0	0
Proceeds from borrowings under revolving credit facility	0	0
Repayments of borrowings under revolving credit facility	0	0
Repayments of senior secured term loan facility	0	0
Proceeds from issuance of Senior Notes	0	0
Payments to extinguish Senior Notes	0	0
Net change in accounts payable-inventory financing	0	0
Advances from (to) affiliates	0	0
Other financing activities	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents - beginning of period	0	0
Cash and cash equivalents - end of period	0	0
Consolidating Adjustments [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	(0.7)	(9.2)
Capital expenditures	0	0
Cash settlements on interest rate swap agreements		0
Premium payments on interest rate cap agreements		0
Net cash used in investing activities	0	0
Proceeds from borrowings under revolving credit facility	0	0
Repayments of borrowings under revolving credit facility	0	0
Repayments of senior secured term loan facility	0	0
Proceeds from issuance of Senior Notes	0	0
Payments to extinguish Senior Notes	0	0
Net change in accounts payable-inventory financing	0	0
Advances from (to) affiliates	0	0
Other financing activities	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase in cash and cash equivalents	(0.7)	(9.2)
Cash and cash equivalents - beginning of period	(26.1)	(7.4)
Cash and cash equivalents - end of period	(26.8)	(16.6)
Consolidated [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	304.7	129.8
Capital expenditures	(15.7)	(16.7)
Cash settlements on interest rate swap agreements		(6.6)
Premium payments on interest rate cap agreements		(3.2)
Net cash used in investing activities	(15.7)	(26.5)
Proceeds from borrowings under revolving credit facility	256.0	755.0
Repayments of borrowings under revolving credit facility	(256.0)	(783.1)
Repayments of senior secured term loan facility	(201.0)	(132.0)
Proceeds from issuance of Senior Notes	135.7	1,175.0
Payments to extinguish Senior Notes	(136.9)	(1,175.0)
Net change in accounts payable-inventory financing	(25.5)	89.9
Advances from (to) affiliates	0	0
Other financing activities	(2.4)	(25.5)
Net cash used in financing activities	(230.1)	(95.7)
Effect of exchange rate changes on cash and cash equivalents	(0.1)	0.4
Net increase in cash and cash equivalents	58.8	8.0
Cash and cash equivalents - beginning of period	99.9	36.6
Cash and cash equivalents - end of period	$ 158.7	$ 44.6