Reclassifications from Accumulated Other Comprehensive Income (AOCI) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended									3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Cash flow hedging items	Sep. 30, 2013 Cash flow hedging items	Sep. 30, 2014 Pension and other postretirement benefit plan items	Sep. 30, 2013 Pension and other postretirement benefit plan items	Sep. 30, 2013 Unrealized losses on available-for-sale securities	Sep. 30, 2014 Unrealized losses on available-for-sale securities	Jun. 30, 2014 Unrealized losses on available-for-sale securities	Sep. 30, 2014 Foreign currency items	Sep. 30, 2013 Foreign currency items
Changes in the balance of Accumulated Other Comprehensive Income
Balance at the beginning of the period	$ (245.2)	$ (335.7)	$ 7.6	$ (41.5)	$ (236.7)	$ (273.6)	$ (0.4)	$ (0.4)	$ (0.4)	$ (15.7)	$ (20.2)
Other comprehensive (loss) income before reclassifications	(24.6)	2.2	(16.7)	(1.2)			(0.1)			(7.9)	3.5
Amounts reclassified from AOCI	1.5	8.4	(1.5)	4.8	3.0	3.6
Other comprehensive (loss) income	(23.1)	10.6	(18.2)	3.6	3.0	3.6	(0.1)			(7.9)	3.5
Balance at the end of the period	$ (268.3)	$ (325.1)	$ (10.6)	$ (37.9)	$ (233.7)	$ (270.0)	$ (0.5)	$ (0.4)	$ (0.4)	$ (23.6)	$ (16.7)