Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Earnings per share reconciliation

The following table provides a reconciliation between basic and diluted earnings per share for the years ended December 31, 2021, 2020 and 2019:

In millions, except per share data	Year ended December 31,	2021		2020		2019
Net income		$	4,892	$	3,562	$	4,216
Weighted-average basic shares outstanding		708.5		711.3		720.1
Dilutive effect of stock-based compensation		1.8		1.7		2.5
Weighted-average diluted shares outstanding		710.3		713.0		722.6
Basic earnings per share		$	6.90	$	5.01	$	5.85
Diluted earnings per share		$	6.89	$	5.00	$	5.83
Units excluded from the calculation as their inclusion would not have a dilutive effect
Stock options		0.5		0.7		0.5
Performance share units		0.1		0.3		0.2