Pension and Other Postretirement Benefits (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Amounts recognized in the Consolidated Balance Sheets:
Accrued liabilities - current	$ (70.0)	$ (30.7)
Accrued liabilities - current	(17.2)	(15.2)
Accrued pension liabilities - noncurrent	(377.3)	(188.5)
Accrued postretirement benefits	(179.8)	(108.7)
Pension Plans
Amounts recognized in the Consolidated Balance Sheets:
Other assets - noncurrent	0.1	0.2
Accrued liabilities - current	(70.0)	(30.7)
Accrued pension liabilities - noncurrent	(377.3)	(188.5)
Amounts recognized in the Consolidated Balance Sheets	(447.2)	(219.0)
Amounts recognized in accumulated other comprehensive loss:
Net actuarial loss	513.6	333.5
Prior service cost (credit)	3.6	4.3
Total	517.2	337.8
Additional information:
Accumulated benefit obligation for all pension plans	1,112.1	859.2
Other Postretirement Plans
Amounts recognized in the Consolidated Balance Sheets:
Accrued liabilities - current	(17.2)	(15.2)
Accrued postretirement benefits	(179.7)	(108.7)
Amounts recognized in the Consolidated Balance Sheets	(196.9)	(123.9)
Amounts recognized in accumulated other comprehensive loss:
Net actuarial loss	67.9	53.0
Prior service cost (credit)	(4.2)	(12.1)
Total	$ 63.7	$ 40.9