Net Income Per Common Share (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2021		2020
Numerator:
Net income (loss)—basic and diluted	$	620	$	(1,226)
Denominator:
Basic weighted-average common shares outstanding	161.0		162.2
Effect of share-based awards:
Stock options	0.9		—
Nonvested shares	0.6		—
Diluted weighted-average shares	162.5		162.2
Earnings (loss) per share:
Basic	$	3.85	$	(7.56)
Diluted	$	3.82	$	(7.56)
Number of anti-dilutive share-based awards	1.0		2.5