Share-Based Compensation (Tables)

12 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Recognized Share-Based Compensation Cost

Share-based compensation cost recognized on the consolidated income statements is summarized below:

	2023	2022	2021
Before-tax share-based compensation cost	$60.7	$49.5	$44.5
Income tax benefit	(14.6)	(12.1)	(11.0)
After-tax share-based compensation cost	$46.1	$37.4	$33.5

Schedule of Assumptions for Fair Value of Market-Based Deferred Stock Units

The calculation of the fair value of market-based deferred stock units used the following assumptions:

	2023		2022		2021
Expected volatility	32.5	%	30.5	%	29.9	%
Risk-free interest rate	4.0	%	0.8	%	0.2	%
Expected dividend yield	2.4	%	2.1	%	2.1	%

Schedule of Deferred Stock Units and Restricted Stock Activity

A summary of deferred stock unit activity in fiscal year 2023 is presented below:

	Shares (000)	Weighted Average Grant-Date Fair Value
Deferred stock units outstanding at 30 September 2022	730	$222.13
Granted	206	389.34
Paid out	(159)	164.08
Forfeited	(87)	248.26
Adjusted	10	315.33
Deferred stock units outstanding at 30 September 2023	700	$282.60

Schedule of Stock Option Activity

A summary of stock option activity in fiscal year 2023 is presented below:

	Shares (000)	Weighted Average Exercise Price
Stock options outstanding and exercisable at 30 September 2022	564	$106.13
Exercised	(270)	90.57
Stock options outstanding and exercisable at 30 September 2023	294	$120.42