Share-Based Compensation (Tables)

9 Months Ended

Jun. 30, 2024

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:

	Three Months Ended		Nine Months Ended
	30 June		30 June
	2024	2023	2024	2023
Before-tax share-based compensation cost	$17.6	$14.5	$46.0	$46.9
Income tax benefit	(4.2)	(3.5)	(11.1)	(11.4)
After-tax share-based compensation cost	$13.4	$11.0	$34.9	$35.5

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:

Expected volatility	25.0	%
Risk-free interest rate	4.3	%
Expected dividend yield	2.6	%