Property, Plant and Equipment (Details) - USD ($) $ in Millions	Jun. 30, 2023	Jun. 30, 2022
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,439.0	$ 2,281.7
Less: accumulated depreciation	(1,757.6)	(1,629.1)
Property, plant and equipment, net	681.4	652.6
Land and buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	682.2	675.0
Data processing equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,087.5	972.4
Furniture, leaseholds and other
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 669.3	$ 634.3