Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Stock-Based Compensation

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
In millions	2018		2017		2018		2017
Stock-based compensation:
Stock options	$	14	$	15	$	39	$	49
Restricted stock units and performance share units		48		50		133		124
Total stock-based compensation	$	62	$	65	$	172	$	173