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Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 2.1	$ 5.3	$ 5.6	$ 9.7
S&IP Business
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	(1.9)		(1.9)
Disposed of by sale | S&IP Business
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense (benefit) allocated to discontinued operations	(1.7)	0.4	(1.5)	0.8
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1.0	2.3	1.5	3.4
Stock Options | S&IP Business
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	(0.4)		(0.4)
Time-Based Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	0.2	0.9	2.1	3.1
Time-Based Restricted Share Units | S&IP Business
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	(0.9)		(0.9)
Performance-based Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	0.9	$ 2.1	1.9	$ 3.2
Performance-based Restricted Share Units | S&IP Business
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ (0.6)		$ (0.6)

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- Definition

Disposal Group, Including Discontinued Operations, Allocated Share-Based Compensation Expense

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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