Retirement Benefits (Tables)

3 Months Ended

Dec. 31, 2022

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Cost

The components of net periodic (benefit) cost for our defined benefit pension plans for the three months ended 31 December 2022 and 2021 were as follows:

	Pension Benefits
	2022			2021
Three Months Ended 31 December	U.S.	Inter-national	Total	U.S.	Inter-national	Total
Service cost	$2.7	$3.3	$6.0	$4.6	$5.6	$10.2
Non-service (benefit) cost:
Interest cost	32.5	14.4	46.9	18.4	7.6	26.0
Expected return on plan assets	(31.8)	(11.8)	(43.6)	(42.1)	(17.7)	(59.8)
Prior service cost amortization	0.3	—	0.3	0.3	—	0.3
Actuarial loss amortization	14.8	3.0	17.8	16.7	3.9	20.6
Settlements	—	—	—	0.9	—	0.9
Curtailments	—	(1.9)	(1.9)	—	—	—
Other	—	0.3	0.3	—	0.8	0.8
Net Periodic (Benefit) Cost	$18.5	$7.3	$25.8	($1.2)	$0.2	($1.0)