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Stock-Based Compensation

9 Months Ended

Sep. 30, 2021

The following table summarizes stock-based compensation expense by type of award:



	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
	(In millions)
Stock Appreciation Rights	$	(3.5)	$	0.6	$	(3.8)	$	(1.3)
Stock options	—		0.1		—		0.3
Restricted stock and restricted stock units, service based	1.5		1.5		4.5		4.7
Restricted stock and restricted stock units, performance based	2.5		3.0		9.4		8.7
Employee stock purchase plan	—		0.3		0.5		0.8
Total stock-based compensation expense	$	0.5	$	5.5	$	10.6	$	13.2