EQUITY AND CONVERTIBLE PREFERRED STOCK - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	$ 3,908.7	$ 3,997.4	$ 3,345.8
Other comprehensive income (loss) before reclassifications		57.8	(43.1)
Net amounts reclassified from AOCI/(L)		(2.0)	(7.1)
Net current-period other comprehensive income (loss)		55.8	(50.2)
Ending balance	4,612.7	4,612.7	3,721.6
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(777.4)	(662.4)	(717.9)
Ending balance	(606.6)	(606.6)	(768.1)
Gain (Loss) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period		0.7	4.3
Other comprehensive income (loss) before reclassifications		(0.1)	1.1
Net amounts reclassified from AOCI/(L)		0.5	(4.1)
Net current-period other comprehensive income (loss)		0.4	(3.0)
Ending balance	1.1	1.1	1.3
Gain (loss) on Net Investment Hedge
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period		(49.8)	4.1
Other comprehensive income (loss) before reclassifications		(9.9)	(36.7)
Net amounts reclassified from AOCI/(L)		0.0	0.0
Net current-period other comprehensive income (loss)		(9.9)	(36.7)
Ending balance	(59.7)	(59.7)	(32.6)
Other Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period		(667.9)	(770.8)
Other comprehensive income (loss) before reclassifications		66.8	(8.8)
Net amounts reclassified from AOCI/(L)		0.0	0.0
Net current-period other comprehensive income (loss)		66.8	(8.8)
Ending balance	(601.1)	(601.1)	(779.6)
Pension and Other Post-Employment Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period		54.6	44.5
Other comprehensive income (loss) before reclassifications		1.0	1.3
Net amounts reclassified from AOCI/(L)		(2.5)	(3.0)
Net current-period other comprehensive income (loss)		(1.5)	(1.7)
Ending balance	53.1	$ 53.1	$ 42.8
Reclassification from accumulated other comprehensive income (loss), current period, before tax	(3.0)
Other comprehensive income (loss), tax	$ 0.5