Net Income (Loss) Per Common Share (Tables)

6 Months Ended

Jun. 30, 2021

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)	Three months ended June 30,				Six months ended June 30,
	2021		2020		2021		2020
Numerator:
Net income (loss)—basic and diluted	$	703	$	909	$	1,323	$	(317)
Denominator:
Basic weighted-average common shares outstanding	161.1		160.8		161.1		161.5
Effect of share-based awards:
Stock options	1.2		0.3		1.0		—
Nonvested shares	0.6		0.4		0.6		—
Diluted weighted-average shares	162.9		161.5		162.7		161.5
Earnings (loss) per share:
Basic	$	4.36	$	5.65	$	8.21	$	(1.96)
Diluted	$	4.31	$	5.63	$	8.13	$	(1.96)
Number of anti-dilutive share-based awards	0.4		2.7		1.0		2.6