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Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of recognized share-based compensation expense
The tables below provide information on our share-based compensation.
Recognized Share-Based Compensation Expense
Year ended December 31 (in millions)
202120202019
Restricted share units
$729 $628 $564 
Stock options
314 294 231 
Employee stock purchase plans
38 38 30 
Total
$1,081 $960 $825 
Schedule of stock option and restricted share units activity
Stock Options and Restricted Share Units
As of December 31, 2021, unless otherwise stated (in millions, except per share data)Stock
Options		RSUs
Awards granted during 202144 17 
Weighted-average exercise price of awards granted during 2021$54.22  
Stock options outstanding and nonvested RSUs211 44 
Weighted-average exercise price of stock options outstanding$40.38 
Weighted-average fair value at grant date of nonvested RSUs $45.33 
Schedule of stock option and restricted share units weighted-average fair value and significant assumptions The table below presents the weighted-average fair value on the date of grant of RSUs and stock options awarded under our various plans and the related weighted-average valuation assumptions.
Year ended December 31202120202019
RSUs fair value$54.52 $41.71 $40.42 
Stock options fair value$9.72 $6.61 $7.91 
Stock Option Valuation Assumptions:
Dividend yield1.8 %2.2 %2.1 %
Expected volatility22.8 %21.0 %22.0 %
Risk-free interest rate0.9 %1.0 %2.5 %
Expected option life (in years)5.96.06.0