Employee Benefit Plans - Funded Status of Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Change in plan assets:
Fair value of plan assets at beginning of year	$ 1,879.6	$ 1,854.4
Actual return on plan assets	147.7	106.8
Employer contributions	20.1	13.4
Currency translation adjustments	3.7	0.6
Benefits paid	(112.9)	(95.6)
Fair value of plan assets at end of year	1,938.2	1,879.6	$ 1,854.4
Change in benefit obligation:
Benefit obligation at beginning of year	1,706.2	1,725.8
Service cost	6.0	5.2	4.8
Interest cost	87.4	84.6	78.2
Actuarial loss/(gain)	26.0	(14.6)
Currency translation adjustments	5.9	0.8
Curtailments and special termination benefits	(0.3)	0.0
Benefits paid	(112.6)	(95.6)
Projected benefit obligation at end of year	1,718.6	1,706.2	$ 1,725.8
Net amount recognized	$ 219.6	$ 173.4