Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Reconciliation of the Earnings and Number of Shares Used in Calculations of Basic and Diluted Earnings Per Share

The table below presents the reconciliation of the earnings and number of shares used in our calculations of basic and diluted earnings per share:

	Three Months Ended				Six Months Ended
(in millions, except per share amounts)	June 30, 2019		June 30, 2018		June 30, 2019		June 30, 2018
Computation of Basic Earnings Per Share
Net income	$	232	$	667	$	607	$	1,087
Shares for basic earnings per share	333.8		353.4		336.7		355.9
Basic earnings per share	$	0.70	$	1.89	$	1.80	$	3.06
Computation of Diluted Earnings Per Share
Net income	$	232	$	667	$	607	$	1,087
Shares for basic earnings per share	333.8		353.4		336.7		355.9
Effect of dilutive securities
Share-based compensation	2.6		3.9		2.9		4.4
Shares for diluted earnings per share	336.4		357.3		339.6		360.3
Diluted earnings per share	$	0.69	$	1.87	$	1.79	$	3.02