RESTRUCTURING COSTS - Restructuring Roll Forward (Details) - USD ($) $ in Millions		12 Months Ended
	Jul. 01, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Reserve [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member	us-gaap:AccountingStandardsUpdate201602Member	us-gaap:AccountingStandardsUpdate201409Member
Turnaround Plan
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	$ 0.0	$ 0.0
Restructuring charges		186.8
Payments		(32.7)
Change in estimates		(21.6)
Non-cash utilization		1.1
Effect of exchange rates		1.7
Balance—June 30, 2020		133.8	$ 0.0
Turnaround Plan | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	(1.5)	(1.5)
Balance—June 30, 2020			(1.5)
Turnaround Plan | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		1.2
Turnaround Plan | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		132.6
Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	67.0	67.0
Payments		(28.6)
Change in estimates		(23.9)
Effect of exchange rates		(0.3)
Balance—June 30, 2020		12.7	67.0
Global Integration Activities | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	(1.5)	(1.5)
Balance—June 30, 2020			(1.5)
Global Integration Activities | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		2.3
Global Integration Activities | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		10.4
2018 Restructuring Actions
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	17.1	17.1
Payments		(9.5)
Change in estimates		(3.0)
Effect of exchange rates		(0.6)
Balance—June 30, 2020		2.8	17.1
2018 Restructuring Actions | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	(1.2)	(1.2)
Balance—June 30, 2020			(1.2)
2018 Restructuring Actions | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		1.4
2018 Restructuring Actions | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		1.4
Severance and Employee Benefits | Turnaround Plan
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	0.0	0.0
Restructuring charges		181.4
Payments		(28.4)
Change in estimates		(21.6)
Non-cash utilization		0.0
Effect of exchange rates		1.7
Balance—June 30, 2020		133.1	0.0
Severance and Employee Benefits | Turnaround Plan | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	0.0	0.0
Balance—June 30, 2020			0.0
Severance and Employee Benefits | Turnaround Plan | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		1.2
Severance and Employee Benefits | Turnaround Plan | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		131.9
Severance and Employee Benefits | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	53.7	53.7
Payments		(25.2)
Change in estimates		(18.3)
Effect of exchange rates		(0.3)
Balance—June 30, 2020		9.9	53.7
Severance and Employee Benefits | Global Integration Activities | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	0.0	0.0
Balance—June 30, 2020			0.0
Severance and Employee Benefits | Global Integration Activities | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		0.8
Severance and Employee Benefits | Global Integration Activities | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		9.1
Severance and Employee Benefits | 2018 Restructuring Actions
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	15.5	15.5
Payments		(9.3)
Change in estimates		(3.0)
Effect of exchange rates		(0.6)
Balance—June 30, 2020		2.6	15.5
Severance and Employee Benefits | 2018 Restructuring Actions | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	0.0	0.0
Balance—June 30, 2020			0.0
Severance and Employee Benefits | 2018 Restructuring Actions | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		1.4
Severance and Employee Benefits | 2018 Restructuring Actions | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		1.2
Third-Party Contract Terminations | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	11.7	11.7
Payments		(3.4)
Change in estimates		(5.5)
Effect of exchange rates		0.0
Balance—June 30, 2020		2.8	11.7
Third-Party Contract Terminations | Global Integration Activities | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	0.0	0.0
Balance—June 30, 2020			0.0
Third-Party Contract Terminations | Global Integration Activities | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		1.5
Third-Party Contract Terminations | Global Integration Activities | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		1.3
Third-Party Contract Terminations | 2018 Restructuring Actions
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	0.1	0.1
Payments		(0.1)
Change in estimates		0.0
Effect of exchange rates		0.0
Balance—June 30, 2020		0.0	0.1
Third-Party Contract Terminations | 2018 Restructuring Actions | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020
Third-Party Contract Terminations | 2018 Restructuring Actions | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		0.0
Third-Party Contract Terminations | 2018 Restructuring Actions | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		0.0
Fixed Asset Write-offs | Turnaround Plan
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	0.0	0.0
Restructuring charges		(1.1)
Payments		0.0
Change in estimates		0.0
Non-cash utilization		1.1
Effect of exchange rates		0.0
Balance—June 30, 2020		0.0	0.0
Fixed Asset Write-offs | Turnaround Plan | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	0.0	0.0
Balance—June 30, 2020			0.0
Fixed Asset Write-offs | Turnaround Plan | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		0.0
Fixed Asset Write-offs | Turnaround Plan | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		0.0
Other Exit Costs | Turnaround Plan
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	0.0	0.0
Restructuring charges		6.5
Payments		(4.3)
Change in estimates		0.0
Non-cash utilization		0.0
Effect of exchange rates		0.0
Balance—June 30, 2020		0.7	0.0
Other Exit Costs | Turnaround Plan | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	(1.5)	(1.5)
Balance—June 30, 2020			(1.5)
Other Exit Costs | Turnaround Plan | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		0.0
Other Exit Costs | Turnaround Plan | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		0.7
Other Exit Costs | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	1.6	1.6
Payments		0.0
Change in estimates		(0.1)
Effect of exchange rates		0.0
Balance—June 30, 2020		0.0	1.6
Other Exit Costs | Global Integration Activities | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	(1.5)	(1.5)
Balance—June 30, 2020			(1.5)
Other Exit Costs | Global Integration Activities | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		0.0
Other Exit Costs | Global Integration Activities | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		0.0
Other Exit Costs | 2018 Restructuring Actions
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	1.5	1.5
Payments		(0.1)
Change in estimates		0.0
Effect of exchange rates		0.0
Balance—June 30, 2020		0.2	1.5
Other Exit Costs | 2018 Restructuring Actions | Cumulative Effect, Period of Adoption, Adjustment
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019	$ (1.2)	(1.2)
Balance—June 30, 2020			$ (1.2)
Other Exit Costs | 2018 Restructuring Actions | Discontinued Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		0.0
Other Exit Costs | 2018 Restructuring Actions | Continuing Operations
Restructuring Reserve [Roll Forward]
Balance—July 1, 2019
Balance—June 30, 2020		$ 0.2