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Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2019

Share Based Compensation [Abstract]

Summary of Restricted Stock and Performance Unit Award Activity

The following table presents restricted stock and performance unit award activity for the nine months ended September 30, 2019:

		Restricted Stock								Performance Units
		Shares				Weighted Average Grant- Date Fair Value				Shares				Weighted Average Grant- Date Fair Value
Outstanding at January 1, 2019			743,591			$	86.90				266,704			$	90.01
Granted			199,185				95.45				115,608				96.98
Vested			(209,687	)			68.21				(59,165	)			67.84
Forfeitures			(8,836	)			100.69				—				—
Outstanding at September 30, 2019			724,253			$	94.50				323,147			$	96.56

Compensation Expense for Share-Based Awards

Our share-based compensation expense is recorded in "Selling, general, and administrative expenses." Compensation expense for share-based awards recognized in the Consolidated Statements of Income, net of forfeitures, was as follows (dollars in millions):

		Three Months Ended September 30,								Nine Months Ended September 30,
		2019				2018				2019				2018
Restricted stock		$	3.5			$	4.9			$	19.1			$	13.9
Performance units			2.4				1.7				5.4				3.5
Total share-based compensation expense			5.9				6.6				24.5				17.4
Income tax benefit			(1.5	)			(1.6	)			(6.2	)			(4.4	)
Share-based compensation expense, net of tax benefit		$	4.4			$	5.0			$	18.3			$	13.0

Unrecognized Compensation Expense for Share-Based Awards

The unrecognized compensation expense for all share-based awards at September 30, 2019 was as follows (dollars in millions):

		September 30, 2019
		Unrecognized Compensation Expense				Remaining Weighted Average Recognition Period (in years)
Restricted stock		$	31.0				3.0
Performance units			19.4				2.6
Total unrecognized share-based compensation expense		$	50.4				2.9

X

- Definition

Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Tabular disclosure of the changes in outstanding nonvested shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 718
-SubTopic 10
-Section 50
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Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
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