STOCK BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Stock-Based Compensation Expense Resulting from Stock Option Awards, RSUs, PSUs, and ESPP and Canada ESPP

The following table presents the total stock-based compensation expense resulting from stock option awards, RSUs, PSUs and the U.S. ESPP and Canada ESPP included in the Consolidated Statements of Loss:

In millions
	Year Ended December 31,
	2021		2020		2019
SG&A - stock option plans	$	2.0	$	3.2	$	8.0
SG&A - RSUs	14.8		15.6		7.8
SG&A - PSUs	9.6		5.9		0.5
SG&A - U.S. ESPP and Canada ESPP	0.7		0.8		0.8
Total pre-tax expense	$	27.1	$	25.5	$	17.1

Stock Option Activity

Stock option activity for the year ended December 31, 2021 is summarized as follows:

	Number of Options	Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Life	Total Aggregate Intrinsic Value
				(in years)	(in millions)
Outstanding as of January 1, 2021	2,860,468	$	96.00
Granted	—	$	—
Exercised	(50,099)	$	52.33
Forfeited	(19,827)	$	66.60
Cancelled or expired	(872,012)	$	98.64
Outstanding as of December 31, 2021	1,918,530	$	96.25	1.94	$	2.6
Exercisable as of December 31, 2021	1,751,550	$	100.02	1.70	$	1.5

Intrinsic Value of Options Exercised

The following table sets forth the intrinsic value of options exercised for the years ended December 31:

In millions
	2021		2020		2019
Total exercise intrinsic value of options exercised	$	1.1	$	0.5	$	2.1

Summary of RSU Activity

RSUs activity during the year ended December 31, 2021, is as follows:

	Number of Units	Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Life	Total Aggregate Intrinsic Value
				(in years)	(in millions)
Non-vested as of January 1, 2021	547,235	$	54.96
Granted	253,860	$	68.71
Vested and Released	(186,342)	$	55.26
Forfeited	(58,431)	$	58.23
Non-vested as of December 31, 2021	556,322	$	60.79	0.88	$	33.2

Summary of PSU Activity

PSU activity during the year ended December 31, 2021, is as follows:

	Number of Units	Weighted Average Grant Date Fair Value
Non-vested as of January 1, 2021	92,042	$	57.79
Granted	88,997	$	57.66
Vested and Released	(88,269)	$	57.61
Forfeited	(16,784)	$	60.60
Non-vested as of December 31, 2021	75,986	$	57.23