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Stock-Based Incentive Compensation Plans (Tables)
12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Compensation Expense by Award Type
Total compensation expense (in millions) by award type for our stock-based incentive compensation plans was as follows:

For the Years Ended December 31,
202320222021
Stock options$$$
Performance shares12 10 18 
RSUs41 35 35 
Total$61 $51 $61 
Recognized tax benefit$$11 $13 
Total Unrecognized Compensation Expense for All Stock-Based Incentive Compensation Plans
Total unrecognized compensation expense (in millions) and expected weighted-average life (in years) by award type for our stock-based incentive compensation plans was as follows:

For the Years Ended December 31,
202320222021
ExpenseWeighted-Average PeriodExpenseWeighted-Average PeriodExpenseWeighted-Average Period
Stock options$0.8$11 0.8$0.7
Performance shares21 1.319 1.214 1.2
RSUs54 1.655 1.443 1.4
Total unrecognized stock-based
incentive compensation expense$84 $85 $65 
Schedule of Stock Option Valuation Assumptions
The option price assumptions used for our stock option awards were as follows:

For the Years Ended December 31,
202320222021
Weighted-average fair value per option granted$11.64 $18.13 $17.26 
Weighted-average assumptions:
Dividend yield4.1 %3.2%3.0%
Expected volatility48.1 %44.4%45.0%
Risk-free interest rate (1)
3.8-4.1%
1.9-3.8%
0.6-1.0%
Expected life (in years)5.85.85.8

(1) Risk-free interest rate expressed as a range and not a weighted average.
Summary of Activity for Stock Options Information with respect to our incentive plans involving stock options with service conditions (aggregate intrinsic value shown in millions) was as follows:
SharesWeighted-Average Exercise PriceWeighted-Average Remaining Contractual TermAggregate Intrinsic Value
Outstanding as of December 31, 20223,396,539 $58.36 
Granted687,027  33.90
Exercised(7,170) 29.54
Forfeited or expired(199,418) 54.14
Outstanding as of December 31, 20233,876,978$54.30 5.71$– 
Vested or expected to vest as of December 31, 2023 (1)
 3,725,100$54.65 5.59$– 
Exercisable as of December 31, 2023 2,752,896$59.57 4.44$– 

(1) Includes estimated forfeitures.
Information with respect to our incentive plans involving stock options with performance conditions (aggregate intrinsic value shown in millions) was as follows:
SharesWeighted-Average Exercise PriceWeighted-Average Remaining Contractual TermAggregate Intrinsic Value
Outstanding as of December 31, 2022121,397$57.55 
Granted24,49625.66 
Forfeited or expired(33,356)73.99 
Outstanding as of December 31, 2023112,537$45.73 2.36$– 
Vested or expected to vest as of December 31, 2023 (1)
107,553$45.92 2.30$– 
Exercisable as of December 31, 202395,924$46.41 2.12$– 

(1) Includes estimated forfeitures.
Summary of Activity for Performance Shares Information with respect to our performance shares was as follows:
SharesWeighted-Average Grant-Date Fair Value
Outstanding as of December 31, 2022 (1)
767,428 $64.61 
Granted692,803 38.36 
Vested– – 
Forfeited(79,253)54.00 
Performance adjustment (2)
(188,570)64.62 
Outstanding as of December 31, 2023 (1)
1,192,408 $50.06 

(1) Represents target award amounts.
(2) Represents the difference between the target shares granted and the actual shares vested based upon the achievement level of performance measures.
Summary of Activity for Restricted Stock Units Information with respect to our RSUs was as follows:
SharesWeighted-Average Grant-Date Fair Value
Outstanding as of December 31, 20221,939,149$61.26 
Granted1,828,88132.91 
Vested(669,674)62.00 
Forfeited(179,038)49.96 
Outstanding as of December 31, 20232,919,318 $44.00