Net Income Per Common Share (Tables)

12 Months Ended

Dec. 31, 2023

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,
	2023		2022		2021
Numerator:
Net income (loss)—basic and diluted	$	1,843	$	(487)	$	2,968
Denominator:
Basic weighted-average common shares outstanding	157.0		158.8		161.0
Effect of share-based awards:
Stock options	0.7		—		1.1
Nonvested shares	0.4		—		0.6
Diluted weighted-average shares	158.1		158.8		162.7
Earnings (loss) per share:
Basic	$	11.74	$	(3.06)	$	18.43
Diluted	11.66		(3.06)		18.24
Number of anti-dilutive share-based awards	1.3		2.2		0.8