LOSS PER COMMON SHARE (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Computation of Basic and Diluted (Loss) Earnings Per Share

The following table shows the effect of stock-based awards on the weighted average number of shares outstanding used in calculating diluted earnings per share:

In millions, except per share data
	Year Ended December 31,
	2021	2020	2019
Weighted average common shares outstanding - basic	91.8	91.5	91.0
Incremental shares outstanding related to stock-based awards (1)	—	—	—
Weighted average common shares outstanding - diluted	91.8	91.5	91.0

(1)In periods of net loss, stock-based awards are anti-dilutive and therefore excluded from the (loss) earnings per share calculation.

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Anti-dilutive stock-based awards excluded from the computation of diluted (loss) earnings per share using the treasury stock method includes the following:

In thousands
	Year Ended December 31,
	2021	2020	2019
Options excluded from computation of diluted loss per share.	1,897	3,017	4,507
RSUs excluded from computation of diluted loss per share.	63	4	98