Property, Plant and Equipment (Details) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,244.5	$ 2,228.7
Less: accumulated depreciation	(1,560.0)	(1,524.8)
Property, plant and equipment, net	684.5	703.9
Land and buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	686.5	737.2
Data processing equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	902.0	847.9
Furniture, leaseholds and other
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 656.0	$ 643.6