EARNINGS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share Table

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Computation of Net Income (Loss) per Share	(In millions, except per share data)
Net income (loss)	$	390.7	$	(736.8)	$	990.1	$	(936.9)
Basic shares	160.1		157.9		159.4		157.8
Basic net income (loss) per share	$	2.44	$	(4.67)	$	6.21	$	(5.94)
Diluted shares:
Basic shares	160.1		157.9		159.4		157.8
Stock-based compensation	3.8		—		3.6		—
Diluted shares	163.9		157.9		163.0		157.8
Diluted net income (loss) per share	$	2.38	$	(4.67)	$	6.07	$	(5.94)