EQUITY AND CONVERTIBLE PREFERRED STOCK - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	$ 3,228.8	$ 4,593.4
Other comprehensive (loss) income before reclassifications	(11.4)	(123.1)
Net amounts reclassified from AOCI/(L)	5.5	(1.5)
Net current-period other comprehensive income (loss)	(5.9)	(124.6)
Balance, end of period	3,425.6	4,464.3
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(456.2)	(58.8)
Balance, end of period	(462.1)	(183.4)
Loss on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(43.0)	(13.3)
Other comprehensive (loss) income before reclassifications	(1.0)	(0.5)
Net amounts reclassified from AOCI/(L)	6.7	(0.7)
Net current-period other comprehensive income (loss)	5.7	(1.2)
Balance, end of period	(37.3)	(14.5)
Gain (loss) on Net Investment Hedge
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	261.9	214.8
Other comprehensive (loss) income before reclassifications	(210.7)	161.2
Net amounts reclassified from AOCI/(L)	0.0	0.0
Net current-period other comprehensive income (loss)	(210.7)	161.2
Balance, end of period	51.2	376.0
Other Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(683.8)	(257.4)
Other comprehensive (loss) income before reclassifications	200.3	(283.8)
Net amounts reclassified from AOCI/(L)	0.0	0.0
Net current-period other comprehensive income (loss)	200.3	(283.8)
Balance, end of period	(483.5)	(541.2)
Pension and Other Post-Employment Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	8.7	(2.9)
Other comprehensive (loss) income before reclassifications	0.0	0.0
Net amounts reclassified from AOCI/(L)	(1.2)	(0.8)
Net current-period other comprehensive income (loss)	(1.2)	(0.8)
Balance, end of period	7.5	$ (3.7)
Reclassification from accumulated other comprehensive income (loss), current period, before tax	(1.2)
Other comprehensive income (loss), tax	$ 0.0