Financial Information for Guarantor Subsidiaries and Non-Guarantor Subsidiaries - Supplemental Condensed Consolidating Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 115.1	$ 128.7	$ 171.8	$ 153.7
Restricted cash	24.7	20.2
Accounts receivable, net	495.0	487.1
Notes receivable, net	125.4	167.7
Inventories	242.3	248.5
Prepaid expenses, deposits and other current assets	114.1	123.3
Property and equipment, net	612.2	794.0
Investment in subsidiaries	0.0	0.0
Goodwill	2,888.4	3,013.7	4,108.3
Intangible assets, net	1,768.3	1,920.0
Intercompany balances	0.0	0.0
Software, net	409.1	485.9
Other assets	292.8	343.1
Total assets	7,087.4	7,732.2	9,721.1
Liabilities and stockholders’ (deficit) equity
Current portion of long-term debt	49.3	50.3
Other current liabilities	643.1	603.6
Long-term debt, excluding current portion	8,024.9	8,156.7
Other long-term liabilities	305.8	417.1
Intercompany balances	0.0	0.0
Stockholders’ (deficit) equity	(1,935.7)	(1,495.5)	3.9
Total liabilities and stockholders' deficit	7,087.4	7,732.2
Reportable Legal Entities | Parent Company
Assets
Cash and cash equivalents	32.7	43.2	37.9	57.3
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	11.6	26.8
Property and equipment, net	5.6	8.2
Investment in subsidiaries	3,000.7	3,319.6
Goodwill	0.0	0.0
Intangible assets, net	185.8	138.3
Intercompany balances	0.0	0.0
Software, net	74.7	35.6
Other assets	233.6	232.5
Total assets	3,544.7	3,804.2
Liabilities and stockholders’ (deficit) equity
Current portion of long-term debt	0.0	0.0
Other current liabilities	100.5	63.7
Long-term debt, excluding current portion	248.7	248.0
Other long-term liabilities	159.0	119.1
Intercompany balances	4,972.2	4,868.9
Stockholders’ (deficit) equity	(1,935.7)	(1,495.5)
Total liabilities and stockholders' deficit	3,544.7	3,804.2
Reportable Legal Entities | SGI
Assets
Cash and cash equivalents	1.7	0.0	0.1	0.0
Restricted cash	0.0	0.0
Accounts receivable, net	61.4	94.6
Notes receivable, net	0.0	0.0
Inventories	40.3	36.9
Prepaid expenses, deposits and other current assets	15.7	7.0
Property and equipment, net	98.4	106.4
Investment in subsidiaries	926.7	838.1
Goodwill	188.3	186.0
Intangible assets, net	37.5	39.8
Intercompany balances	5,415.1	5,857.1
Software, net	21.4	32.7
Other assets	236.5	123.4
Total assets	7,043.0	7,322.0
Liabilities and stockholders’ (deficit) equity
Current portion of long-term debt	43.0	43.0
Other current liabilities	158.7	150.5
Long-term debt, excluding current portion	7,767.3	7,890.3
Other long-term liabilities	12.4	14.5
Intercompany balances	0.0	0.0
Stockholders’ (deficit) equity	(938.4)	(776.3)
Total liabilities and stockholders' deficit	7,043.0	7,322.0
Reportable Legal Entities | Guarantor Subsidiaries
Assets
Cash and cash equivalents	0.0	0.5	27.3	26.0
Restricted cash	24.6	20.0
Accounts receivable, net	199.2	223.0
Notes receivable, net	94.4	114.2
Inventories	83.1	104.2
Prepaid expenses, deposits and other current assets	45.6	51.0
Property and equipment, net	369.3	501.1
Investment in subsidiaries	944.0	819.0
Goodwill	1,931.6	1,934.0
Intangible assets, net	1,343.0	1,505.0
Intercompany balances	0.0	0.0
Software, net	264.6	358.0
Other assets	50.8	51.8
Total assets	5,350.2	5,681.8
Liabilities and stockholders’ (deficit) equity
Current portion of long-term debt	0.0	0.0
Other current liabilities	216.3	238.8
Long-term debt, excluding current portion	0.0	0.0
Other long-term liabilities	468.8	502.1
Intercompany balances	559.5	966.8
Stockholders’ (deficit) equity	4,105.6	3,974.1
Total liabilities and stockholders' deficit	5,350.2	5,681.8
Reportable Legal Entities | Non-Guarantor Subsidiaries
Assets
Cash and cash equivalents	81.8	85.0	106.5	70.4
Restricted cash	0.1	0.2
Accounts receivable, net	234.4	169.5
Notes receivable, net	31.0	53.5
Inventories	138.1	119.6
Prepaid expenses, deposits and other current assets	41.2	38.5
Property and equipment, net	154.9	189.8
Investment in subsidiaries	0.0	0.0
Goodwill	768.5	893.7
Intangible assets, net	202.0	236.9
Intercompany balances	116.6	0.0
Software, net	48.4	59.6
Other assets	173.5	241.7
Total assets	1,990.5	2,088.0
Liabilities and stockholders’ (deficit) equity
Current portion of long-term debt	6.3	7.3
Other current liabilities	168.7	150.6
Long-term debt, excluding current portion	8.9	18.4
Other long-term liabilities	67.2	87.7
Intercompany balances	0.0	21.4
Stockholders’ (deficit) equity	1,739.4	1,802.6
Total liabilities and stockholders' deficit	1,990.5	2,088.0
Eliminating Entries
Assets
Cash and cash equivalents	(1.1)	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	(19.2)	(12.2)
Prepaid expenses, deposits and other current assets	0.0	0.0
Property and equipment, net	(16.0)	(11.5)
Investment in subsidiaries	(4,871.4)	(4,976.7)
Goodwill	0.0	0.0
Intangible assets, net	0.0	0.0
Intercompany balances	(5,531.7)	(5,857.1)
Software, net	0.0	0.0
Other assets	(401.6)	(306.3)
Total assets	(10,841.0)	(11,163.8)
Liabilities and stockholders’ (deficit) equity
Current portion of long-term debt	0.0	0.0
Other current liabilities	(1.1)	0.0
Long-term debt, excluding current portion	0.0	0.0
Other long-term liabilities	(401.6)	(306.3)
Intercompany balances	(5,531.7)	(5,857.1)
Stockholders’ (deficit) equity	(4,906.6)	(5,000.4)
Total liabilities and stockholders' deficit	$ (10,841.0)	$ (11,163.8)