Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Stock-Based Compensation

We recorded stock-based compensation for Restricted Shares as follows:

	Year Ended December 31,
	2021		2020		2019
	(Amounts in millions)
Stock-based compensation expense	$	29.5	$	27.3	$	23.9
Related income tax benefit	(6.7)		(6.2)		(5.4)
Net stock-based compensation expense	$	22.8	$	21.1	$	18.5

Information Regarding Restricted Shares

The following table summarizes information regarding Restricted Shares:

	Year Ended December 31, 2021
	Shares	Weighted Average Grant-Date Fair Value
Number of unvested Restricted Shares:
Outstanding — beginning of year	1,373,657	$	46.76
Granted	1,058,836	39.46
Vested	(569,362)	44.22
Canceled	(192,120)	46.28
Outstanding — end of year	1,671,011	$	43.06