Property, Plant, and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Property, Plant and Equipment [Line Items]
Depreciation Expense	$ 192.8	$ 180.6	$ 173.1
Property, Plant and Equipment, Gross	2,228.7	2,181.8
Accumulated Depreciation	(1,524.8)	(1,417.6)
Property, Plant and Equipment, Net	703.9	764.2
Assets Held-for-sale, Long Lived, Fair Value Disclosure	6.7
Land and Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	737.2	781.2
Data Processing Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	847.9	749.0
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 643.6	$ 651.6