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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Expense
The following table summarizes stock-based compensation expense for the years ended December 31, 2023, 2022 and 2021.
Year Ended December 31,202320222021
RSUs and PSUs$172 $155 $163 
Stock options — 3 9 
Expense included in operating and SG&A172 158 172 
Expense included in restructuring and other corporate matters (a)
5 14 20 
Stock-based compensation expense, before income taxes177 172 192 
Related tax benefit(35)(35)(41)
Stock-based compensation expense, net of tax benefit$142 $137 $151 
(a) Reflects accelerations as a result of restructuring activities.
Summary of RSU and PSU Activity
The following table summarizes our RSU and PSU share activity:
Weighted Average
SharesGrant Date Fair Value
Non-vested at December 31, 202211,115,371 $33.02 
Granted (a)
10,435,617 $22.83 
Vested(4,426,844)$33.74 
Forfeited (1,619,883)$29.01 
Non-vested at December 31, 202315,504,261 $26.38 
(a) Grant activity includes 1.4 million of PSUs at target for 2023.
Summary of Stock Option Activity
The following table summarizes our stock option activity under the Plans.
Weighted Average
Stock OptionsExercise Price
Outstanding and Exercisable at December 31, 20225,096,947 $60.18 
Expired (1,551,541)$72.72 
Outstanding and Exercisable at December 31, 20233,545,406 $54.70 
Summary of Other Stock Option Exercises Information
The following table summarizes other information relating to stock option exercises during the year ended December 31, 2021. There were no stock option exercises during the years ended December 31, 2023 and 2022.
Year Ended December 31, 2021
Cash received from stock option exercises$408 
Tax benefit of stock option exercises$29 
Intrinsic value of stock option exercises$128