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SHARE-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Additional Information on RSUs
The following table provides additional information on RSUs, including PSUs, for the last three fiscal years:
202120202019
Stock-based compensation expense (in millions)$171 $188 $177 
Weighted average grant-date fair value (per unit)$141 $101 $117 
Aggregate intrinsic value of distributed RSUs (in millions)$205 $234 $276 
Changes in Outstanding RSU Grants
The following table presents the changes in our outstanding RSUs, including PSUs, during 2021 and the associated weighted average grant-date fair values:
Number of RSUs (in millions)Weighted Average Grant-Date Fair Value (per unit)
Outstanding at year-end 20205.8 $107 
Granted0.5 $141 
Distributed(1.7)$113 
Forfeited(0.2)$106 
Outstanding at year-end 20214.4 $109