Pension and Other Postretirement Benefits (Details) - USD ($)	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Pension Plans
Pension and Other Postretirement Benefit Disclosures
Service cost	$ 7,700,000	$ 8,000,000
Interest cost	14,500,000	13,500,000
Expected return on plan assets	(16,400,000)	(17,200,000)
Amortization of net loss	6,800,000	4,200,000
Amortization of prior service cost	100,000	100,000
Net periodic benefit costs	12,700,000	8,600,000
Contributions	0	2,800,000
Defined benefit pension plan, expected contributions during the remainder of fiscal year 2015	0
Other Postretirement Plans
Pension and Other Postretirement Benefit Disclosures
Service cost	800,000	1,100,000
Interest cost	2,500,000	3,000,000
Expected return on plan assets	(1,700,000)	(1,700,000)
Amortization of net loss	700,000	500,000
Amortization of prior service cost	(1,600,000)	0
Net periodic benefit costs	$ 700,000	$ 2,900,000