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Share-Based Payments (Tables)
9 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Restricted Stock Activity The transactions for restricted shares and restricted share units for the nine months ended June 30, 2021 were as follows:
Shares /UnitsWeighted-
average
Grant-date
Fair Value
Non-vested at September 30, 2020750,322 $40.88 
Granted499,050 30.06 
Vested(109,365)55.40 
Expired or forfeited(38,467)55.79 
Non-vested at June 30, 20211,101,540 $34.01 
Schedule of Assumptions Used in Estimating Fair Value The following table indicates the assumptions used in estimating the fair value of certain stock-based awards granted during the nine-month period ended June 30, 2021.
Restricted
Share Units
Stock
Options
Expected volatility42.9 %41.9 %
Dividend yield3.2 %3.1 %
Average risk-free interest rate0.2 %0.5 %
Average expected term (years)3.05.0