Financial Information for Guarantor Subsidiaries and Non-Guarantor Subsidiaries - Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents	$ 101.4	$ 128.7	$ 129.1	$ 171.8
Restricted cash	24.5	20.2
Accounts receivable, net	501.3	487.1
Notes receivable, net	140.0	167.7
Inventories	249.0	248.5
Prepaid expenses, deposits and other current assets	120.9	123.3
Property and equipment, net	695.5	794.0
Investment in subsidiaries	0.0	0.0
Goodwill	2,992.5	3,013.7
Intangible assets, net	1,891.9	1,920.0
Intercompany balances	0.0	0.0
Software, net	443.2	485.9
Other assets	304.9	343.1
Total assets	7,465.1	7,732.2
Liabilities and stockholders' (deficit) equity
Current portion of long-term debt	49.7	50.3
Other current liabilities	595.7	603.6
Long-term debt, excluding current portion	8,067.6	8,156.7
Other long-term liabilities	419.0	417.1
Intercompany balances	0.0	0.0
Stockholders' (deficit) equity	(1,666.9)	(1,495.5)
Total liabilities and stockholders' (deficit) equity	7,465.1	7,732.2
Reportable Legal Entities | Parent Company
Assets
Cash and cash equivalents	32.4	43.2	41.9	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	31.6	26.8
Property and equipment, net	11.9	8.2
Investment in subsidiaries	3,202.2	3,280.9
Goodwill	0.0	0.0
Intangible assets, net	207.1	138.3
Intercompany balances	0.0	0.0
Software, net	52.4	35.6
Other assets	291.0	232.5
Total assets	3,828.6	3,765.5
Liabilities and stockholders' (deficit) equity
Current portion of long-term debt	0.0	0.0
Other current liabilities	74.3	63.7
Long-term debt, excluding current portion	248.4	248.0
Other long-term liabilities	179.2	119.1
Intercompany balances	4,993.6	4,830.2
Stockholders' (deficit) equity	(1,666.9)	(1,495.5)
Total liabilities and stockholders' (deficit) equity	3,828.6	3,765.5
Reportable Legal Entities | SGI
Assets
Cash and cash equivalents	0.5	0.0	1.4	0.1
Restricted cash	0.0	0.0
Accounts receivable, net	98.0	94.6
Notes receivable, net	0.0	0.0
Inventories	35.8	36.9
Prepaid expenses, deposits and other current assets	14.1	7.0
Property and equipment, net	101.4	106.4
Investment in subsidiaries	851.8	838.1
Goodwill	188.3	186.0
Intangible assets, net	38.7	39.8
Intercompany balances	6,531.8	6,511.1
Software, net	25.4	32.7
Other assets	119.3	123.4
Total assets	8,005.1	7,976.0
Liabilities and stockholders' (deficit) equity
Current portion of long-term debt	43.0	43.0
Other current liabilities	153.2	150.5
Long-term debt, excluding current portion	7,806.2	7,890.3
Other long-term liabilities	14.2	14.5
Intercompany balances	0.0	0.0
Stockholders' (deficit) equity	(11.5)	(122.3)
Total liabilities and stockholders' (deficit) equity	8,005.1	7,976.0
Reportable Legal Entities | Guarantor Subsidiaries
Assets
Cash and cash equivalents	0.0	4.7	15.8	28.8
Restricted cash	24.4	20.0
Accounts receivable, net	226.5	233.6
Notes receivable, net	91.2	114.2
Inventories	89.4	104.2
Prepaid expenses, deposits and other current assets	35.1	52.1
Property and equipment, net	430.4	502.2
Investment in subsidiaries	796.8	648.3
Goodwill	1,988.2	1,990.5
Intangible assets, net	1,423.6	1,505.8
Intercompany balances	0.0	0.0
Software, net	316.3	359.8
Other assets	44.7	51.7
Total assets	5,466.6	5,587.1
Liabilities and stockholders' (deficit) equity
Current portion of long-term debt	0.0	0.0
Other current liabilities	208.4	245.4
Long-term debt, excluding current portion	0.0	0.0
Other long-term liabilities	498.8	502.1
Intercompany balances	1,503.7	1,558.2
Stockholders' (deficit) equity	3,255.7	3,281.4
Total liabilities and stockholders' (deficit) equity	5,466.6	5,587.1
Reportable Legal Entities | Non-Guarantor Subsidiaries
Assets
Cash and cash equivalents	68.5	80.8	70.0	105.0
Restricted cash	0.1	0.2
Accounts receivable, net	176.8	158.9
Notes receivable, net	48.8	53.5
Inventories	136.2	119.6
Prepaid expenses, deposits and other current assets	40.1	37.4
Property and equipment, net	166.3	188.7
Investment in subsidiaries	0.0	0.0
Goodwill	816.0	837.2
Intangible assets, net	222.5	236.1
Intercompany balances	0.0	0.0
Software, net	49.1	57.8
Other assets	214.6	241.7
Total assets	1,939.0	2,011.9
Liabilities and stockholders' (deficit) equity
Current portion of long-term debt	6.7	7.3
Other current liabilities	159.8	144.0
Long-term debt, excluding current portion	13.0	18.4
Other long-term liabilities	91.5	87.7
Intercompany balances	34.5	122.6
Stockholders' (deficit) equity	1,633.5	1,631.9
Total liabilities and stockholders' (deficit) equity	1,939.0	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	(12.4)	(12.2)
Prepaid expenses, deposits and other current assets	0.0	0.0
Property and equipment, net	(14.5)	(11.5)
Investment in subsidiaries	(4,850.8)	(4,767.3)
Goodwill	0.0	0.0
Intangible assets, net	0.0	0.0
Intercompany balances	(6,531.8)	(6,511.1)
Software, net	0.0	0.0
Other assets	(364.7)	(306.2)
Total assets	(11,774.2)	(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	(364.7)	(306.3)
Intercompany balances	(6,531.8)	(6,511.0)
Stockholders' (deficit) equity	(4,877.7)	(4,791.0)
Total liabilities and stockholders' (deficit) equity	$ (11,774.2)	$ (11,608.3)