Employee Benefit Plans - (Tables)

12 Months Ended

Jun. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Summary of Costs Recored for Defined Contribution Savings Plans

The costs recorded by the Company for these plans were:

	Years ended June 30,
	2016		2015		2014
	(in millions)
401(k) savings plan	$	27.3	$	24.9	$	22.1
ERSP	1.2		0.4		—
Total	$	28.5	$	25.3	$	22.1

Summary of Amounts Charged to Expense

The amounts charged to expense by the Company for these plans were:

	Years ended June 30,
	2016		2015		2014
	(in millions)
SORP	$	3.2	$	2.7	$	2.9
SERP	0.6		0.6		0.5
Total	$	3.8	$	3.3	$	3.4

The amounts charged to expense by the Company for this plan were:

	Years ended June 30,
	2016		2015		2014
	(in millions)
Executive Retiree Health Insurance Plan	$	0.3	$	0.2	$	0.2

Summary of Benefit Obligation under Plan

The benefit obligation to the Company under these plans at June 30, 2016, 2015 and 2014 was:

	Years ended June 30,
	2016		2015		2014
	(in millions)
SORP	$	30.0	$	25.3	$	21.0
SERP	3.6		2.7		2.3
Total	$	33.6	$	28.0	$	23.3

The benefit obligation to the Company under this plan at June 30, 2016, 2015 and 2014 was:

	Years ended June 30,
	2016		2015		2014
	(in millions)
Executive Retiree Health Insurance Plan	$	4.2	$	3.9	$	3.2