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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Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

+ References

No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Stock-Based Compensation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Stock-Based Compensation (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	$ 7.7	$ 4.5	$ 21.7	$ 14.6
Stock compensation cost capitalized as inventory			0.5
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	3.2	1.8	7.8	5.3
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	2.3	1.3	6.4	3.9
Performance share awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	2.2	1.4	6.1	4.0
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	0.0	0.0	1.4	1.4
Retirement of certain executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated stock compensation expense	1.7	$ 0.0	4.3	$ 0.3
Non-U.S. Employees \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	$ 1.1		$ 1.1