Property, Plant, and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Property, Plant and Equipment [Line Items]
Depreciation Expense	$ 173.1	$ 147.3	$ 135.6
Property, Plant and Equipment, Gross	2,136.3	2,031.4
Accumulated Depreciation	(1,342.6)	(1,251.5)
Property, Plant and Equipment, Net	793.7	779.9
Land and Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	791.8	778.1
Data Processing Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	707.4	653.7
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 637.1	$ 599.6