Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2019

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,
	2019		2018		2019		2018
Numerator:
Net income—basic and diluted	$	248	$	553	$	1,371	$	739
Denominator:
Basic weighted-average common shares outstanding	163.3		162.7		163.2		163.3
Effect of share-based awards:
Stock options	1.4		0.8		1.2		0.9
Nonvested shares	0.9		0.5		0.7		0.5
Diluted weighted-average shares	165.6		164.0		165.1		164.7
Earnings per share:
Basic	$	1.51	$	3.40	$	8.40	$	4.53
Diluted	$	1.49	$	3.38	$	8.30	$	4.49
Number of anti-dilutive share-based awards	—		1.1		0.4		1.3