Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Computation of Income Per Share from Continuing Operations

The computation of net income per share was as follows:

In millions except per share amounts	2018		2017		2016
Net Income	$	2,563	$	1,687	$	2,035
Net income per share—Basic:
Weighted-average common shares	335.0		344.1		355.0
Net income per share—Basic	$	7.65	$	4.90	$	5.73
Net income per share—Diluted:
Weighted-average common shares	335.0		344.1		355.0
Effect of dilutive stock options and restricted stock units	2.1		2.7		2.1
Weighted-average common shares assuming dilution	337.1		346.8		357.1
Net income per share—Diluted	$	7.60	$	4.86	$	5.70