Stock Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Stock-based Compensation Expense

Stock-based compensation expense for the following periods were:

In millions	Three months ended September 30				Nine months ended September 30
	2021		2020		2021		2020
Restricted stock units	$	30	$	23	$	96	$	55
Stock options	6		6		17		16
Employee stock purchase plan	2		2		6		5
Stock-based compensation expense	38		31		119		76
Tax benefit	(5)		(4)		(14)		(9)
Stock-based compensation expense (net of tax)	$	33	$	27	$	105	$	67

Schedule Of Share-Based Payment Award, Restricted Stock Units with Market-Condition, Valuation Assumptions

The table below details the assumptions used in determining the fair value of the market-based restricted stock units.

	Nine months ended September 30
Dividend yield	—	%
Risk-free interest rate	0.10	%
Expected volatility	57.20	%