EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share Table

	Three Months Ended March 31,
	2021		2020
Computation of Net Income (Loss) per Share	(In millions, except per share data)
Net income (loss)	$	243.6	$	(80.0)
Basic shares	158.6		157.8
Basic net income (loss) per share	$	1.54	$	(0.51)
Diluted shares:
Basic shares	158.6		157.8
Stock-based compensation	2.2		—
Diluted shares	160.8		157.8
Diluted net income (loss) per share	$	1.51	$	(0.51)