Goodwill and Other Intangibles (Other Intangible Assets and Capitalized Software) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Other Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 132.1	$ 197.9
Less: Accumulated Amortization	57.4	120.3
Net Book Value	74.7	77.6
Computer Software
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,754.7	3,479.3
Less: Accumulated Amortization	1,759.3	1,517.4
Net Book Value	$ 1,995.4	$ 1,961.9