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Stock-Based Compensation (Tables)
12 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount
The following table summarizes stock-based compensation related charges and benefits (in millions):

Year Ended September 30,
202220212020
Compensation expense$104 $97 $66 
Income tax benefit resulting from share-based compensation arrangements26 24 16 
Tax impact from exercise and vesting of equity settled awards12 12 — 
Summary of Nonvested Restricted Stock Awards
A summary of non-vested restricted stock awards at September 30, 2022, and changes for the year then ended, is presented below:
Weighted
Average
Price
Shares/Units
Subject to
Restriction
Non-vested, September 30, 2021$44.06 3,334,437 
Granted74.63 1,508,550 
Vested42.52 (1,497,497)
Forfeited56.58 (396,296)
Non-vested, September 30, 2022$58.78 2,949,194 
Schedule of Share-Based Payment Award, Performance Share, Valuation Assumptions
The following table summarizes the assumptions used in determining the fair value of stock options granted:
 Year Ended September 30,
 202220212020
Risk-free interest rate0.99%0.20%1.60%
Expected volatility of the Company’s stock30.00%30.90%21.80%
Summary of Nonvested PSUs
A summary of the status of the Company’s non-vested PSUs at September 30, 2022, and changes for the year then ended, is presented below:
Weighted
Average
Price
Shares/Units
Subject to
PSU
Non-vested, September 30, 2021$43.11 1,196,318 
Granted82.88 482,030 
Vested36.35 (402,465)
Forfeited60.02 (132,812)
Non-vested, September 30, 2022$60.30 1,143,071 
Assumptions Used in Black-Scholes Option Valuation Model
The following table summarizes the assumptions used in determining the fair value of stock options granted:
 Year Ended September 30,
 202220212020
Expected life of option (years)6.06.56.5
Risk-free interest rate1.35%0.60%1.67%
Expected volatility of the Company’s stock27.80%27.60%22.40%
Expected dividend yield on the Company’s stock1.71%2.28%2.49%
Summary of Stock Option Activity
A summary of stock option activity at September 30, 2022, and changes for the year then ended, is presented below:
Weighted
Average
Option Price
Shares
Subject to
Option
Weighted
Average
Remaining
Contractual
Life (years)
Aggregate
Intrinsic
Value
(in millions)
Outstanding, September 30, 2021$38.84 5,951,011 
Granted79.54 548,398 
Exercised33.77 (542,903)
Forfeited or expired50.97 (272,659)
Outstanding, September 30, 2022$42.46 5,683,847 5.7$52 
Exercisable, September 30, 2022$37.86 4,082,897 4.1$47 

The following table summarizes additional stock option information:
Year Ended September 30,
202220212020
Weighted-average grant-date fair value of options granted$18.59 $9.36 $7.29 
Intrinsic value of options exercised (in millions)19 94 30