Retirement Benefits (Tables)

3 Months Ended

Dec. 31, 2024

Retirement Benefits [Abstract]

Schedule of Net Periodic (Benefit) Cost

The components of net periodic cost for our defined benefit pension plans for the three months ended 31 December 2024 and 2023 were as follows:

	Pension Benefits
	2024			2023
Three Months Ended 31 December	U.S.	International	Total	U.S.	International	Total
Service cost	$2.3	$2.9	$5.2	$2.4	$2.8	$5.2
Non-service cost:
Interest cost	29.9	13.9	43.8	33.7	14.8	48.5
Expected return on plan assets	(33.2)	(14.7)	(47.9)	(30.0)	(11.6)	(41.6)
Prior service cost amortization	0.3	0.2	0.5	0.3	0.2	0.5
Actuarial loss amortization	11.7	2.4	14.1	14.3	3.2	17.5
Other	—	0.1	0.1	—	0.1	0.1
Net Periodic Cost	$11.0	$4.8	$15.8	$20.7	$9.5	$30.2