Employee Retirement Benefit Plans-Accumulated Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Employer contributions between measurement date and reporting date
Fair value of plan assets at beginning of year	$ 202.0
Fair value of plan assets at end of year	168.0	$ 202.0
Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Amortization of Gain (Loss)	(2.0)	(1.0)
Accumulated Benefit Obligation	206.0	242.0
Change in Benefit Obligation
Benefit obligation at beginning of year	246.0	268.0
Company service cost	3.0	3.0
Interest cost	11.0	9.0
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	1.0	1.0
Settlements	(36.0)	(4.0)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	11.0	10.0
Actuarial (gain)/loss	1.0	(28.0)
Exchange rate gain/(loss)	(4.0)	7.0
Benefit obligation at end of year	211.0	246.0
Employer contributions between measurement date and reporting date
Fair value of plan assets at beginning of year	202.0	240.0
Actual return on plan assets	3.0	(38.0)
Company contributions	11.0	7.0
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	1.0	1.0
Settlements	(36.0)	(4.0)
Defined Benefit Plan, Plan Assets, Benefits Paid	(11.0)	(10.0)
Exchange rate gain/(loss)	(2.0)	6.0
Fair value of plan assets at end of year	168.0	202.0
Funded status at end of year	(43.0)	(44.0)
Net Pension assets (liabilities)	(43.0)	(44.0)
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	1.0	1.0
Other Post-Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Amortization of Gain (Loss)	0.0	0.0
Accumulated Benefit Obligation	1.0	2.0
Change in Benefit Obligation
Benefit obligation at beginning of year	2.0
Company service cost	0.0	0.0
Interest cost	0.0	0.0
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	0.0	0.0
Settlements	0.0	0.0
Defined Benefit Plan, Benefit Obligation, Benefits Paid	0.0	0.0
Actuarial (gain)/loss	0.0	0.0
Exchange rate gain/(loss)	0.0	0.0
Benefit obligation at end of year	2.0	2.0
Employer contributions between measurement date and reporting date
Fair value of plan assets at beginning of year	0.0
Actual return on plan assets	0.0	0.0
Company contributions	0.0	0.0
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	0.0	0.0
Settlements	0.0	0.0
Defined Benefit Plan, Plan Assets, Benefits Paid	0.0	0.0
Exchange rate gain/(loss)	0.0	0.0
Fair value of plan assets at end of year	0.0	0.0
Funded status at end of year	(1.0)	(2.0)
Net Pension assets (liabilities)	(1.0)	(2.0)
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	$ 0.0	$ 0.0