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Stock Compensation Plans (Tables)
3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
Schedule of Stock-based Compensation Expense Stock-based compensation expense for the following periods were:
In millionsThree months ended March 31
20222021
Restricted stock units$26 $36 
Stock options5
Employee stock purchase plan3
Stock-based compensation expense3444
Tax benefit(4)(5)
Stock-based compensation expense (net of tax)$30 $39 
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.
Dividend yield %
Risk-free interest rate1.73 %
Expected volatility59.26 %