Net Income Per Common Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Calculations For Basic And Diluted Earnings Per Share

The table shows calculations for basic and diluted earnings per share:

(In millions, except per share data)	Years ended December 31,
	2022		2021		2020
Numerator:
Net income (loss)—basic and diluted	$	(486)	$	2,946	$	1,216
Denominator:
Basic weighted-average common shares outstanding	158.8		161.0		161.2
Effect of share-based awards:
Stock options	—		1.1		0.7
Nonvested shares	—		0.6		0.5
Diluted weighted-average shares	158.8		162.7		162.4
Earnings (loss) per share:
Basic	$	(3.06)	$	18.29	$	7.55
Diluted	(3.06)		18.10		7.49
Number of anti-dilutive share-based awards	2.2		0.8		1.4