Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Summary of Restricted Stock and Performance Unit Award Activity

The following table presents restricted stock and performance unit award activity for the six months ended June 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		(198,292	)		67.62		(59,165	)		67.84
Forfeitures		(6,530	)		102.74		—			—
Outstanding at June 30, 2019		737,954		$	94.25		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 June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Restricted stock	$	10.8		$	5.0		$	15.7		$	8.9
Performance units		0.9			0.6			2.9			1.8
Total share-based compensation expense		11.7			5.6			18.6			10.7
Income tax benefit		(3.0	)		(1.4	)		(4.7	)		(2.7	)
Share-based compensation expense, net of tax benefit	$	8.7		$	4.2		$	13.9		$	8.0

Unrecognized Compensation Expense for Share-Based Awards

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

	June 30, 2019
	Unrecognized Compensation Expense		Remaining Weighted Average Recognition Period (in years)
Restricted stock	$	34.7	2.9
Performance units		21.6		2.8
Total unrecognized share-based compensation expense	$	56.3		2.9