FINANCIAL DATA BY SEGMENT - Schedule of Revenues and Assets by Geographic Area (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 6,889.1	$ 6,506.8	$ 6,060.9
Assets	8,545.0	8,242.4	8,233.2
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5,907.0	5,620.1	5,260.0
Assets	5,667.4	5,620.1	5,514.3
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	463.8	393.9	367.4
Assets	619.2	457.2	448.4
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	464.7	445.9	392.2
Assets	2,000.9	1,926.7	2,024.3
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	53.6	46.8	41.3
Assets	$ 257.5	$ 238.4	$ 246.2