Financial Information for Guarantor Subsidiaries and Non-Guarantor Subsidiaries - Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 128.7		$ 171.8	$ 153.7	$ 109.0
Restricted cash	20.2		27.2
Accounts receivable, net	487.1		468.4
Notes receivable, net	167.7		188.7
Inventories	248.5		265.6
Prepaid expenses, deposits and other current assets	123.3		183.5
Property and equipment, net	794.0		1,012.8
Investment in subsidiaries	0.0		0.0
Goodwill	3,013.7	$ 3,085.2	4,108.3	1,183.1
Intangible assets, net	1,920.0		2,251.6
Intercompany balances	0.0		0.0
Software, net	485.9		592.7
Other assets	343.1		450.5
Total assets	7,732.2	8,215.1	9,721.1	4,109.6
LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY
Current portion of long-term debt	50.3		50.6
Other current liabilities	603.6		605.2
Long-term debt, excluding current portion	8,156.7		8,262.3
Other long-term liabilities	417.1		799.1
Intercompany balances	0.0		0.0
Stockholders’ (deficit) equity	(1,495.5)	(1,380.8)	3.9	375.0
Total liabilities and stockholders' (deficit) equity	7,732.2	$ 8,215.1	9,721.1
Parent Company
ASSETS
Cash and cash equivalents	43.2		37.9	57.3	27.1
Restricted cash	0.0		0.0
Accounts receivable, net	0.0		0.0
Notes receivable, net	0.0		0.0
Inventories	0.0		0.0
Prepaid expenses, deposits and other current assets	26.8		56.4
Property and equipment, net	8.2		0.5
Investment in subsidiaries	3,280.9		4,730.7
Goodwill	0.0		0.0
Intangible assets, net	138.3		162.0
Intercompany balances	0.0		0.0
Software, net	35.6		15.6
Other assets	232.5		8.3
Total assets	3,765.5		5,011.4
LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY
Current portion of long-term debt	0.0		0.0
Other current liabilities	63.7		68.2
Long-term debt, excluding current portion	248.0		247.2
Other long-term liabilities	119.1		136.2
Intercompany balances	4,830.2		4,555.9
Stockholders’ (deficit) equity	(1,495.5)		3.9
Total liabilities and stockholders' (deficit) equity	3,765.5		5,011.4
SGI
ASSETS
Cash and cash equivalents	0.0		0.1	0.0	0.4
Restricted cash	0.0		0.0
Accounts receivable, net	94.6		61.8
Notes receivable, net	0.0		0.0
Inventories	36.9		35.2
Prepaid expenses, deposits and other current assets	7.0		3.4
Property and equipment, net	106.4		119.5
Investment in subsidiaries	838.1		953.4
Goodwill	186.0		253.6
Intangible assets, net	39.8		42.2
Intercompany balances	6,511.1		6,580.0
Software, net	32.7		32.9
Other assets	123.4		55.2
Total assets	7,976.0		8,137.3
LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY
Current portion of long-term debt	43.0		43.0
Other current liabilities	150.5		118.0
Long-term debt, excluding current portion	7,890.3		7,987.4
Other long-term liabilities	14.5		59.1
Intercompany balances	0.0		(0.1)
Stockholders’ (deficit) equity	(122.3)		(70.1)
Total liabilities and stockholders' (deficit) equity	7,976.0		8,137.3
Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	4.7		28.8	26.8	2.4
Restricted cash	20.0		27.1
Accounts receivable, net	233.6		212.9
Notes receivable, net	114.2		136.6
Inventories	104.2		133.8
Prepaid expenses, deposits and other current assets	52.1		80.6
Property and equipment, net	502.2		660.4
Investment in subsidiaries	648.3		975.2
Goodwill	1,990.5		2,781.6
Intangible assets, net	1,505.8		1,761.8
Intercompany balances	0.0		0.0
Software, net	359.8		467.3
Other assets	51.7		78.2
Total assets	5,587.1		7,344.3
LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY
Current portion of long-term debt	0.0		0.0
Other current liabilities	245.4		245.2
Long-term debt, excluding current portion	0.0		0.0
Other long-term liabilities	502.1		543.0
Intercompany balances	1,558.2		1,637.9
Stockholders’ (deficit) equity	3,281.4		4,918.2
Total liabilities and stockholders' (deficit) equity	5,587.1		7,344.3
Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	80.8		105.0	69.6	79.1
Restricted cash	0.2		0.1
Accounts receivable, net	158.9		193.7
Notes receivable, net	53.5		52.1
Inventories	119.6		124.4
Prepaid expenses, deposits and other current assets	37.4		43.1
Property and equipment, net	188.7		241.7
Investment in subsidiaries	0.0		0.0
Goodwill	837.2		1,073.1
Intangible assets, net	236.1		285.6
Intercompany balances	0.0		0.0
Software, net	57.8		76.9
Other assets	241.7		296.8
Total assets	2,011.9		2,492.5
LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY
Current portion of long-term debt	7.3		7.6
Other current liabilities	144.0		173.8
Long-term debt, excluding current portion	18.4		27.7
Other long-term liabilities	87.7		48.8
Intercompany balances	122.6		386.3
Stockholders’ (deficit) equity	1,631.9		1,848.3
Total liabilities and stockholders' (deficit) equity	2,011.9		2,492.5
Eliminating Entries
ASSETS
Cash and cash equivalents	0.0		0.0	$ 0.0	$ 0.0
Restricted cash	0.0		0.0
Accounts receivable, net	0.0		0.0
Notes receivable, net	0.0		0.0
Inventories	(12.2)		(27.8)
Prepaid expenses, deposits and other current assets	0.0		0.0
Property and equipment, net	(11.5)		(9.3)
Investment in subsidiaries	(4,767.3)		(6,659.3)
Goodwill	0.0		0.0
Intangible assets, net	0.0		0.0
Intercompany balances	(6,511.1)		(6,580.0)
Software, net	0.0		0.0
Other assets	(306.2)		12.0
Total assets	(11,608.3)		(13,264.4)
LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY
Current portion of long-term debt	0.0		0.0
Other current liabilities	0.0		0.0
Long-term debt, excluding current portion	0.0		0.0
Other long-term liabilities	(306.3)		12.0
Intercompany balances	(6,511.0)		(6,580.0)
Stockholders’ (deficit) equity	(4,791.0)		(6,696.4)
Total liabilities and stockholders' (deficit) equity	$ (11,608.3)		$ (13,264.4)