Financial Information for Guarantor Subsidiaries and Non-Guarantor Subsidiaries - Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents	$ 145.7	$ 128.7	$ 151.2	$ 171.8
Restricted cash	21.2	20.2
Accounts receivable, net	472.1	487.1
Notes receivable, net	161.8	167.7
Inventories	259.9	248.5
Prepaid expenses, deposits and other current assets	124.7	123.3
Property and equipment, net	734.8	794.0
Investment in subsidiaries	0.0	0.0
Goodwill	3,012.0	3,013.7
Intangible assets, net	1,946.0	1,920.0
Intercompany balances	0.0	0.0
Software, net	469.9	485.9
Other assets	342.6	343.1
Total assets	7,690.7	7,732.2
Liabilities and stockholders' (deficit) equity
Current portion of long-term debt	50.0	50.3
Other current liabilities	619.1	603.6
Long-term debt, excluding current portion	8,137.1	8,156.7
Other long-term liabilities	468.4	417.1
Intercompany balances	0.0	0.0
Stockholders' (deficit) equity	(1,583.9)	(1,495.5)
Total liabilities and stockholders' (deficit) equity	7,690.7	7,732.2
Parent Company
Assets
Cash and cash equivalents	61.8	43.2	57.7	37.9
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	23.5	26.8
Property and equipment, net	7.3	8.2
Investment in subsidiaries	3,234.8	3,280.9
Goodwill	0.0	0.0
Intangible assets, net	215.1	138.3
Intercompany balances	0.0	0.0
Software, net	44.2	35.6
Other assets	250.8	232.5
Total assets	3,837.5	3,765.5
Liabilities and stockholders' (deficit) equity
Current portion of long-term debt	0.0	0.0
Other current liabilities	50.4	63.7
Long-term debt, excluding current portion	248.2	248.0
Other long-term liabilities	185.0	119.1
Intercompany balances	4,937.8	4,830.2
Stockholders' (deficit) equity	(1,583.9)	(1,495.5)
Total liabilities and stockholders' (deficit) equity	3,837.5	3,765.5
SGI
Assets
Cash and cash equivalents	0.1	0.0	0.3	0.1
Restricted cash	0.0	0.0
Accounts receivable, net	89.4	94.6
Notes receivable, net	0.0	0.0
Inventories	45.7	36.9
Prepaid expenses, deposits and other current assets	3.9	7.0
Property and equipment, net	98.2	106.4
Investment in subsidiaries	853.4	838.1
Goodwill	186.0	186.0
Intangible assets, net	39.3	39.8
Intercompany balances	6,576.5	6,511.1
Software, net	26.9	32.7
Other assets	121.4	123.4
Total assets	8,040.8	7,976.0
Liabilities and stockholders' (deficit) equity
Current portion of long-term debt	43.0	43.0
Other current liabilities	190.8	150.5
Long-term debt, excluding current portion	7,873.2	7,890.3
Other long-term liabilities	15.3	14.5
Intercompany balances	0.0	0.0
Stockholders' (deficit) equity	(81.5)	(122.3)
Total liabilities and stockholders' (deficit) equity	8,040.8	7,976.0
Guarantor Subsidiaries
Assets
Cash and cash equivalents	2.3	4.7	19.6	28.8
Restricted cash	21.1	20.0
Accounts receivable, net	225.4	233.6
Notes receivable, net	110.8	114.2
Inventories	96.6	104.2
Prepaid expenses, deposits and other current assets	41.0	52.1
Property and equipment, net	468.2	502.2
Investment in subsidiaries	784.4	648.3
Goodwill	1,990.5	1,990.5
Intangible assets, net	1,459.1	1,505.8
Intercompany balances	0.0	0.0
Software, net	344.8	359.8
Other assets	46.5	51.7
Total assets	5,590.7	5,587.1
Liabilities and stockholders' (deficit) equity
Current portion of long-term debt	0.0	0.0
Other current liabilities	231.9	245.4
Long-term debt, excluding current portion	0.0	0.0
Other long-term liabilities	501.4	502.1
Intercompany balances	1,536.5	1,558.2
Stockholders' (deficit) equity	3,320.9	3,281.4
Total liabilities and stockholders' (deficit) equity	5,590.7	5,587.1
Non-Guarantor Subsidiaries
Assets
Cash and cash equivalents	81.5	80.8	73.6	105.0
Restricted cash	0.1	0.2
Accounts receivable, net	157.3	158.9
Notes receivable, net	51.0	53.5
Inventories	129.0	119.6
Prepaid expenses, deposits and other current assets	56.3	37.4
Property and equipment, net	172.1	188.7
Investment in subsidiaries	0.0	0.0
Goodwill	835.5	837.2
Intangible assets, net	232.5	236.1
Intercompany balances	0.0	0.0
Software, net	54.0	57.8
Other assets	247.6	241.7
Total assets	2,016.9	2,011.9
Liabilities and stockholders' (deficit) equity
Current portion of long-term debt	7.0	7.3
Other current liabilities	146.0	144.0
Long-term debt, excluding current portion	15.7	18.4
Other long-term liabilities	90.3	87.7
Intercompany balances	102.2	122.6
Stockholders' (deficit) equity	1,655.7	1,631.9
Total liabilities and stockholders' (deficit) equity	2,016.9	2,011.9
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	(11.4)	(12.2)
Prepaid expenses, deposits and other current assets	0.0	0.0
Property and equipment, net	(11.0)	(11.5)
Investment in subsidiaries	(4,872.6)	(4,767.3)
Goodwill	0.0	0.0
Intangible assets, net	0.0	0.0
Intercompany balances	(6,576.5)	(6,511.1)
Software, net	0.0	0.0
Other assets	(323.7)	(306.2)
Total assets	(11,795.2)	(11,608.3)
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	(323.6)	(306.3)
Intercompany balances	(6,576.5)	(6,511.0)
Stockholders' (deficit) equity	(4,895.1)	(4,791.0)
Total liabilities and stockholders' (deficit) equity	$ (11,795.2)	$ (11,608.3)