Share-Based Compensation (Tables)

12 Months Ended

Sep. 30, 2021

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:

	2021	2020	2019
Before-tax share-based compensation cost	$44.5	$55.8	$41.2
Income tax benefit	(11.0)	(13.0)	(9.7)
After-tax share-based compensation cost	$33.5	$42.8	$31.5

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

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

	2021		2020		2019
Expected volatility	29.9	%	17.8	%	17.5	%
Risk-free interest rate	0.2	%	1.6	%	2.8	%
Expected dividend yield	2.1	%	2.4	%	2.6	%

Schedule of Deferred Stock Units and Restricted Stock Activity

A summary of deferred stock unit activity in fiscal year 2021 is presented below:

	Shares (000)	Weighted Average Grant-Date Fair Value
Deferred stock units outstanding at 30 September 2020	926	$181.14
Granted	188	261.95
Paid out	(330)	185.33
Forfeited	(17)	241.55
Adjusted	87	161.64
Deferred stock units outstanding at 30 September 2021	854	$194.12

Schedule of Stock Option Activity

A summary of stock option activity in fiscal year 2021 is presented below:

	Shares (000)	Weighted Average Exercise Price
Stock options outstanding and exercisable at 30 September 2020	941	$96.95
Exercised	(140)	80.63
Stock options outstanding and exercisable at 30 September 2021	801	$99.79