EMPLOYEE BENEFITS (Tables)

6 Months Ended

Dec. 31, 2017

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of changes in benefit obligations, fair value of plan assets and the underfunded status for the Company's defined benefit pension and postretirement benefit plans

	Pension Plans
	(in millions)
Change in pension plan assets
Fair value of plan assets at July 1, 2017	$	3.7
Return on plan assets		1.2
Employer contributions		1.6
Participant contributions		0.3
Benefits paid from plan assets		(3.6)
Acquisition transfer		93.9
Foreign currency exchange rate changes		0.1
Fair value of pension plan assets at December 31, 2017	$	97.2

	Pension Plans
	As of December 31, 2017
	(in millions)
Projected benefit obligation	$	106.6
Fair value of plan assets		97.2
Unfunded status		9.4
Current portion of unfunded status	$	—
Non-current portion of unfunded status	$	9.4

Schedule of accumulated other comprehensive loss ("AOCI") that have not yet been recognized as components of net periodic benefit cost

	As of June 30, 2017		Deferrals		Net Change in AOCI		As of December 31, 2017
	(in millions)
Accumulated other comprehensive loss:
Pension plans:
Net actuarial (loss)/gain	$	—	$	1.3	$	1.3	$	1.3
Prior service benefit/(cost)		—		(8.0)		(8.0)		(8.0)
Deferred income tax benefit/(expense)		—		1.7		1.7		1.7
Total pension plans		—		(5.0)		(5.0)		(5.0)
Post-retirement benefit plans:
Net actuarial (loss)/gain		(1.2)		—		—		(1.2)
Prior service (cost)/benefit		—		—		—		—
Deferred income tax benefit/(expense)		0.4		—		—		0.4
Total post-retirement benefit plans		(0.8)		—		—		(0.8)
Total accumulated other comprehensive loss	$	(0.8)	$	(5.0)	$	(5.0)	$	(5.8)

Schedule of expected benefit payments for the Company's defined benefit pension and OPEB plans

			Post-Retirement
	Pension Plans		Benefit Plans
	(in millions)
Year ended June 30,
2018	$	2.8	$	0.6
2019		3.0		0.6
2020		3.2		0.6
2021		3.5		0.5
2022		3.7		0.5
2023-2027		22.6		2.5

Schedule of assumptions used in determining benefit obligations

	Pension Plans		OPEB Plans
Actuarial assumptions:
Discount rate		3.5%		3.5%
Price inflation		1.75%		N/A
Expected long-term rate of return on plan assets		5.9%		N/A
Rate of compensation increase		2% plus merit & promotion		N/A

Schedule of targets for the allocation of invested defined benefit pension plan assets and fair value of plan assets

The following table presents the Company’s target for the allocation of invested defined benefit pension plan assets at December 31, 2017:

	As of December 31, 2017
Fixed income		40%
Equities		55%
Other		5%
Total		100%

The plans assets are invested in various fund categories utilizing multiple strategies and investment managers. Interests in funds are valued using the net asset value ("NAV") per unit of each fund. The NAV reported by the fund manager is based on the market value of the underlying investments owned by each fund, minus its liabilities, divided by the number of shares outstanding.  These funds can be redeemed at NAV, generally at any time.  As the funds do not publish publicly available prices, the NAV practical expedient is the most appropriate fair value classification for the plan asset investments. The value associated with these investments is disclosed in the reconciliation of the total investments measured at fair value shown below.

The table below presents the fair value of plan assets valued at NAV by category for the pension and post-retirement plans at December 31, 2017.

	As of December 31, 2017
	(in millions)
Fixed income	$	36.3
Equities		55.9
Other		5.0
Total	$	97.2

Pension Plans [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of changes in benefit obligations, fair value of plan assets and the underfunded status for the Company's defined benefit pension and postretirement benefit plans

	Pension Plans
	(in millions)
Change in projected benefit obligation for defined benefit pension plans:
Projected benefit obligation at July 1, 2017	$	6.7
Service cost		1.5
Interest cost		0.7
Actuarial loss (gain)		(1.3)
Participant contributions		0.3
Benefits paid from plan assets		(3.6)
Acquisition transfer		102.1
Foreign currency exchange rate changes		0.2
Projected benefit obligation at December 31, 2017	$	106.6

Schedule of net periodic (benefit) cost of the defined benefit pension and OPEB is included in selling, general and administrative expenses

	Pension Plans
	Three months ended December 31, 2017		Six months ended December 31, 2017
	( in millions)
Service cost	$	0.7	$	1.5
Interest cost		0.6		0.7
Expected return on plan assets		(1.0)		(1.1)
Net periodic pension benefit income	$	0.3	$	1.1

Post-Retirement Benefit Plans [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of changes in benefit obligations, fair value of plan assets and the underfunded status for the Company's defined benefit pension and postretirement benefit plans

	Post-Retirement Benefit Plans
	(in millions)
Change in projected benefit obligation for OPEB plans
Projected benefit obligation at July 1, 2017	$	9.9
Service cost		0.1
Interest cost		0.2
Benefits paid by Company		(0.3)
Foreign currency exchange rate changes		0.2
Projected benefit obligation at December 31, 2017	$	10.1

Schedule of net periodic (benefit) cost of the defined benefit pension and OPEB is included in selling, general and administrative expenses

	OPEB Plans
	Three months ended December 31, 2017		Six months ended December 31, 2017
	(in millions)
Service cost	$	—	$	0.1
Interest cost		0.1		0.2
Net periodic post-retirement benefit income	$	0.1	$	0.3