Income Taxes (Details 4) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Income Taxes
Deferred tax assets, pensions	$ 96.5	$ 132.1
Deferred tax assets, postretirement provisions	64.6	90.8
Deferred tax assets, net operating loss carryforwards	21.3	20.7
Deferred tax assets, environmental	4.6	4.5
Derivatives and hedging activities	25.2	20.0
Deferred tax assets, other	28.0	24.5
Gross deferred tax assets	240.2	292.6
Deferred tax assets, valuation allowances	(19.2)	(18.1)
Net deferred tax assets	221.0	274.5
Deferred tax liabilities, depreciation	(227.4)	(239.5)
Deferred tax liabilities, intangible assets	(43.0)	(41.2)
Deferred tax liabilities, inventories	(21.1)	(12.9)
Deferred tax liabilities, Other		(1.7)
Total deferred tax liabilities	(291.5)	(295.3)
Deferred tax liabilities	(70.5)	(20.8)
Undistributed earnings of foreign subsidiaries	$ 122.9