Pension and Other Postretirement Benefits (Details 7) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2014
Pension and Other Postretirement Benefit Disclosures
Estimated net pension expense	$ 45.9
Amounts in other comprehensive loss that are expected to recognized as components of net periodic benefit cost in the next fiscal year
Amortization of prior service cost	0.3
Amortization of net actuarial loss	18.7
Amortization of accumulated other comprehensive loss	19.0
Pension Plans
Pension and Other Postretirement Benefit Disclosures
Estimated net pension expense	34.3
Amounts in other comprehensive loss that are expected to recognized as components of net periodic benefit cost in the next fiscal year
Amortization of prior service cost	0.3
Amortization of net actuarial loss	16.7
Amortization of accumulated other comprehensive loss	17.0
Pension Plans | Minimum
Pension and Other Postretirement Benefit Disclosures
Discount rate used to calculate the net periodic benefit costs for June 30, 2014 (as a percent)	4.25%
Expected long-term rate of return on plan assets used to calculate the net periodic benefit costs (as a percent)	6.25%
Pension Plans | Maximum
Pension and Other Postretirement Benefit Disclosures
Discount rate used to calculate the net periodic benefit costs for June 30, 2014 (as a percent)	4.50%
Expected long-term rate of return on plan assets used to calculate the net periodic benefit costs (as a percent)	7.00%
Other Postretirement Plans
Pension and Other Postretirement Benefit Disclosures
Estimated net pension expense	11.6
Discount rate used to calculate the net periodic benefit costs for June 30, 2014 (as a percent)	6.25%
Amounts in other comprehensive loss that are expected to recognized as components of net periodic benefit cost in the next fiscal year
Amortization of net actuarial loss	2.0
Amortization of accumulated other comprehensive loss	$ 2.0
Other Postretirement Plans | Minimum
Pension and Other Postretirement Benefit Disclosures
Expected long-term rate of return on plan assets used to calculate the net periodic benefit costs (as a percent)	4.25%
Other Postretirement Plans | Maximum
Pension and Other Postretirement Benefit Disclosures
Expected long-term rate of return on plan assets used to calculate the net periodic benefit costs (as a percent)	4.50%