EQUITY - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	6 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	$ 4,593.4	$ 8,855.2
Other comprehensive income (loss) before reclassifications	(15.8)	(120.9)
Net amounts reclassified from AOCI/(L)	(2.9)	(4.3)
Net current-period other comprehensive income (loss)	(18.7)	(125.2)
Balance, end of period	4,481.6	7,611.3
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(58.8)	158.8
Balance, end of period	(77.5)	33.6
(Loss) gain on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(13.3)
Other comprehensive income (loss) before reclassifications	4.9
Net amounts reclassified from AOCI/(L)	0.2
Net current-period other comprehensive income (loss)	5.1
Balance, end of period	(8.2)
Gain on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period		31.7
Other comprehensive income (loss) before reclassifications		(11.8)
Net amounts reclassified from AOCI/(L)		(5.9)
Net current-period other comprehensive income (loss)		(17.7)
Balance, end of period		14.0
Gain on Net Investment Hedge
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	214.8	115.0
Other comprehensive income (loss) before reclassifications	39.3	78.6
Net amounts reclassified from AOCI/(L)	0.0	0.0
Net current-period other comprehensive income (loss)	39.3	78.6
Balance, end of period	254.1	193.6
Other Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(257.4)	(44.3)
Other comprehensive income (loss) before reclassifications	(60.0)	(187.7)
Net amounts reclassified from AOCI/(L)	0.0	0.0
Net current-period other comprehensive income (loss)	(60.0)	(187.7)
Balance, end of period	(317.4)	(232.0)
Pension and Other Post-Employment Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(2.9)	56.4
Other comprehensive income (loss) before reclassifications	0.0	0.0
Net amounts reclassified from AOCI/(L)	(3.1)	1.6
Net current-period other comprehensive income (loss)	(3.1)	1.6
Balance, end of period	(6.0)	$ 58.0
Reclassification from accumulated other comprehensive income (loss), current period, before tax	(3.1)
Other comprehensive income (loss), tax	$ 0.0

Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for net period benefit cost (credit) of defined benefit plan.

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