Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ 39.6	$ 42.0	$ 183.1
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	186.7	461.3	369.8
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(210.9)	(273.1)	(185.8)
Accumulated Other Comprehensive Income (Loss), Net of Tax	15.4	230.2	367.1
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 15.4	$ 230.2	$ 367.1	$ 209.5