Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

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	2017		2016		2017		2016
Stock-based compensation:
Stock options	$	15	$	20	$	49	$	60
Restricted stock units		50		38		124		106
Total stock-based compensation	$	65	$	58	$	173	$	166