Goodwill and Other Intangibles (Other Intangible Assets and Capitalized Software) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Other Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 131.2	$ 197.9
Less: Accumulated Amortization	54.7	120.3
Net Book Value	76.5	77.6
Computer Software
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,600.0	3,479.3
Less: Accumulated Amortization	1,636.5	1,517.4
Net Book Value	$ 1,963.5	$ 1,961.9