STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Mar. 31, 2018

Schedule of Employee Service Share-based Compensation Allocation of Recognized Period Costs

	Three months ended March 31,					Nine months ended March 31,
	2018		2017			2018	2017
	(in millions)
Included in:
Operating costs	$	2.1	$	2.1	$	7.6	$	8.7
Selling, general and administrative expenses		17.1		24.4		62.9		84.3
Total stock-based compensation expense	$	19.2	$	26.5	$	70.5	$	93.0
CII common units	$	—	$	—	$	—	$	10.1
Part A restricted stock units		16.8		17.5		58.4		57.6
Part B restricted stock units		1.9		8.6		10.6		24.3
Part C restricted stock units		0.5		0.4		1.5		1.0
Total stock-based compensation expense	$	19.2	$	26.5	$	70.5	$	93.0

Summary Of Part B RSU Issuance

	During the three months ended
	March 31, 2018		December 31, 2017		September 30, 2017
Part B RSUs granted		77,218		82,556		163,960
Maximum eligible shares of the Company's common stock		532,804		569,636		590,256
Grant date fair value per Part B RSU	$	39.53	$	45.10	$	19.06
Units converted to Company's common stock at vesting date		n/a		n/a		n/a

	During the three months ended
	June 30, 2017		March 31, 2017		December 31, 2016		September 30, 2016
Part B RSUs granted		152,808		171,316		191,015		200,425
Maximum eligible shares of the Company's common stock		550,109		880,564		981,817		1,030,185
Grant date fair value per Part B RSU	$	26.52	$	27.39	$	75.56	$	47.00
Units converted to Company's common stock at vesting date		—		41,368		102,511		99,508

Part A restricted stock units

Summary Of Restricted Stock Units Activity

The following table summarizes the Company’s Part A RSU activity for the nine months ended March 31, 2018:

	Number of Part A RSUs	Weighted average grant-date fair value per share		Weighted average remaining contractual term in months
Outstanding at July 1, 2017	2,364,386	$	31.63	7.1
Granted	1,782,991		35.27
Vested	(2,004,694)		31.37
Forfeited	(225,422)		n/a
Outstanding at March 31, 2018	1,917,261	$	34.47	6.6

Part B restricted stock units

Summary Of Restricted Stock Units Activity

The following table summarizes the Company’s Part B RSU activity for the nine months ended March 31, 2018:

	Number of Part B RSUs	Weighted average grant-date fair value per unit		Weighted average remaining contractual term in months
Outstanding at July 1, 2017	411,973	$	42.86	6.1
Granted	323,734		30.58
Vested	(374,515)		44.03
Forfeited	(73,953)		n/a
Outstanding at March 31, 2018	287,239	$	31.93	7.1