CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue:
Total revenue		$ 3,363.2	$ 3,083.6	$ 2,883.4
Operating expenses:
Cost of revenues		1,255.3	1,164.6	1,106.3
Selling, general and administrative		696.9	613.1	577.0
Research and development		202.3	184.1	204.8
Depreciation, amortization and impairments		689.7	682.8	738.7
Goodwill impairment		0.0	0.0	69.0
Restructuring and other		253.4	45.9	57.0
Operating income (loss)		265.6	393.1	130.6
Other (expense) income:
Interest expense		(597.2)	(609.7)	(661.4)
Earnings from equity investments		24.9	26.7	13.0
(Loss) gain on debt financing transactions		(93.2)	(38.1)	25.2
Gain on remeasurement of debt		43.4	0.0	0.0
Other income, net		17.2	0.2	13.9
Total other expense, net		(604.9)	(620.9)	(609.3)
Net (loss) income before income taxes		(339.3)	(227.8)	(478.7)
Income tax (expense) benefit		(13.1)	(14.5)	125.0
Net (loss) income		(352.4)	(242.3)	(353.7)
Other comprehensive loss:
Foreign currency translation (loss) gain, net of tax		(98.4)	126.4	(104.7)
Pension and post-retirement (loss) gain, net of tax		(1.3)	3.3	(9.7)
Derivative financial instruments unrealized (loss) gain, net of tax		(0.1)	4.2	3.0
Other comprehensive (loss) income		(99.8)	133.9	(111.4)
Comprehensive (loss) income		$ (452.2)	$ (108.4)	$ (465.1)
Basic and diluted net loss per share:
Basic (in dollars per share)		$ (3.87)	$ (2.72)	$ (4.05)
Diluted (in dollars per share)		$ (3.87)	$ (2.72)	$ (4.05)
Weighted average number of shares used in per share calculations:
Basic shares (in shares)		91.1	89.1	87.3
Diluted shares (in shares)		91.1	89.1	87.3
Services
Revenue:
Total revenue		$ 1,777.1	$ 1,522.7	$ 1,424.0
Operating expenses:
Cost of revenues	[1]	505.6	417.2	396.5
Product sales
Revenue:
Total revenue		993.8	978.6	896.2
Operating expenses:
Cost of revenues	[1]	465.6	465.3	424.6
Instant products
Revenue:
Total revenue		592.3	582.3	563.2
Operating expenses:
Cost of revenues	[1]	$ 284.1	$ 282.1	$ 285.2

[1] Exclusive of D&A.