Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2020

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 September 30,				Nine months ended September 30,
	2020		2019		2020		2019
Numerator:
Net income—basic and diluted	$	484	$	248	$	167	$	1,371
Denominator:
Basic weighted-average common shares outstanding	160.9		163.3		161.3		163.2
Effect of share-based awards:
Stock options	0.5		1.4		0.7		1.2
Nonvested shares	0.6		0.9		0.5		0.7
Diluted weighted-average shares	162.0		165.6		162.5		165.1
Earnings per share:
Basic	$	3.01	$	1.51	$	1.03	$	8.40
Diluted	$	2.99	$	1.49	$	1.03	$	8.30
Number of anti-dilutive share-based awards	1.4		—		1.4		0.4