Supplemental Guarantor Information -Condensed Consolidating Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2014 Parent Guarantor [Member]	Dec. 31, 2013 Parent Guarantor [Member]	Mar. 31, 2013 Parent Guarantor [Member]	Dec. 31, 2012 Parent Guarantor [Member]	Mar. 31, 2014 Subsidiary Issuer [Member]	Dec. 31, 2013 Subsidiary Issuer [Member]	Mar. 31, 2013 Subsidiary Issuer [Member]	Dec. 31, 2012 Subsidiary Issuer [Member]	Mar. 31, 2014 Guarantor Subsidiaries [Member]	Dec. 31, 2013 Guarantor Subsidiaries [Member]	Mar. 31, 2013 Guarantor Subsidiaries [Member]	Dec. 31, 2012 Guarantor Subsidiaries [Member]	Mar. 31, 2014 Non-Guarantor Subsidiaries [Member]	Dec. 31, 2013 Non-Guarantor Subsidiaries [Member]	Mar. 31, 2013 Non-Guarantor Subsidiaries [Member]	Dec. 31, 2012 Non-Guarantor Subsidiaries [Member]	Mar. 31, 2014 Co-Issuer [Member]	Dec. 31, 2013 Co-Issuer [Member]	Mar. 31, 2013 Co-Issuer [Member]	Dec. 31, 2012 Co-Issuer [Member]	Mar. 31, 2014 Consolidating Adjustments [Member]	Dec. 31, 2013 Consolidating Adjustments [Member]	Mar. 31, 2013 Consolidating Adjustments [Member]	Dec. 31, 2012 Consolidating Adjustments [Member]	Mar. 31, 2014 Consolidated [Member]	Dec. 31, 2013 Consolidated [Member]	Mar. 31, 2013 Consolidated [Member]	Dec. 31, 2012 Consolidated [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	$ 306.7	$ 188.1	$ 188.1	$ 147.1	$ 37.9	$ 0	$ 0	$ 0	$ 0	$ 290.5	$ 196.5	$ 123.4	$ 48.0	$ 0	$ 0	$ 7.9	$ 0	$ 22.2	$ 14.0	$ 16.2	$ 9.8	$ 0	$ 0	$ 0	$ 0	$ (6.0)	$ (22.4)	$ (0.4)	$ (19.9)	$ 306.7	$ 188.1	$ 147.1	$ 37.9
Accounts receivable, net of allowance for doubtful accounts	1,335.0	1,451.0				0	0			0	0			1,255.2	1,375.9			79.8	75.1			0	0			0	0			1,335.0	1,451.0
Merchandise inventory	388.4	382.0				0	0			0	0			384.1	378.9			4.3	3.1			0	0			0	0			388.4	382.0
Miscellaneous receivables	164.5	146.3				0	0			50.5	49.9			107.6	91.0			6.4	5.4			0	0			0	0			164.5	146.3
Prepaid expenses and other	53.3	46.1				0	0			14.5	10.7			37.1	33.4			4.5	5.1			0	0			(2.8)	(3.1)			53.3	46.1
Total current assets	2,247.9	2,213.5				0	0			355.5	257.1			1,784.0	1,879.2			117.2	102.7			0	0			(8.8)	(25.5)			2,247.9	2,213.5
Property and equipment, net	129.9	131.1				0	0			70.9	69.7			57.4	59.6			1.6	1.8			0	0			0	0			129.9	131.1
Goodwill	2,219.1	2,220.3				0	0			751.9	751.9			1,439.0	1,439.0			28.2	29.4			0	0			0	0			2,219.1	2,220.3
Other intangible assets, net	1,286.6	1,328.0				0	0			332.4	338.5			948.0	982.8			6.2	6.7			0	0			0	0			1,286.6	1,328.0
Deferred financing costs, net	27.5	30.1				0	0			27.5	30.1			0	0			0	0			0	0			0	0			27.5	30.1
Other assets	1.5	1.6				4.7	4.9			1.5	1.4			0	0.1			1.2	0.9			0	0			(5.9)	(5.7)			1.5	1.6
Investment from and advances to subsidiaries						750.1	706.8			2,820.6	2,909.4			0	0			0	0			0	0			(3,570.7)	(3,616.2)			0	0
Total assets	5,912.5	5,924.6				754.8	711.7			4,360.3	4,358.1			4,228.4	4,360.7			154.4	141.5			0	0			(3,585.4)	(3,647.4)			5,912.5	5,924.6
Accounts payable-trade	683.7	662.8				0	0			18.3	21.4			631.9	637.3			39.5	26.5			0	0			(6.0)	(22.4)			683.7	662.8
Accounts payable-inventory financing	250.2	256.6				0	0			0	0			250.2	256.6			0	0			0	0			0	0			250.2	256.6
Current maturities of long-term debt	15.4	45.4				0	0			15.4	45.4			0	0			0	0			0	0			0	0			15.4	45.4
Deferred revenue	93.6	94.8				0	0			0	0			89.4	89.9			4.2	4.9			0	0			0	0			93.6	94.8
Accrued Expenses						0	0			212.4	163.5			157.2	175.1			8.8	7.5			0	0			(2.8)	(3.1)			375.6	343.0
Total current liabilities	1,418.5	1,402.6				0	0			246.1	230.3			1,128.7	1,158.9			52.5	38.9			0	0			(8.8)	(25.5)			1,418.5	1,402.6
Debt	3,157.0	3,205.8				0	0			3,157.0	3,205.8			0	0			0	0			0	0			0	0			3,157.0	3,205.8
Deferred income taxes	540.8	563.5				0	0			169.2	178.3			374.8	388.4			1.5	1.6			0	0			(4.7)	(4.8)			540.8	563.5
Other liabilities	41.4	41.0				0	0			37.9	36.9			3.4	3.6			1.3	1.4			0	0			(1.2)	(0.9)			41.4	41.0
Total long-term liabilities	3,739.2	3,810.3				0	0			3,364.1	3,421.0			378.2	392.0			2.8	3.0			0	0			(5.9)	(5.7)			3,739.2	3,810.3
Total shareholders' equity (deficit)	754.8	711.7				754.8	711.7			750.1	706.8			2,721.5	2,809.8			99.1	99.6			0	0			(3,570.7)	(3,616.2)			754.8	711.7
Total liabilities and shareholders' equity (deficit)	$ 5,912.5	$ 5,924.6				$ 754.8	$ 711.7			$ 4,360.3	$ 4,358.1			$ 4,228.4	$ 4,360.7			$ 154.4	$ 141.5			$ 0	$ 0			$ (3,585.4)	$ (3,647.4)			$ 5,912.5	$ 5,924.6