Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Gross Carrying Amount	$ 96.0	$ 97.5
Accumulated Amortization	(28.3)	(26.4)
Definite-lived intangible assets, Net Carrying Amount	67.7	71.1
Indefinite-lived intangible assets, Net Carrying Amount	2,347.3	2,347.3
Total intangible assets	$ 2,415.0	$ 2,418.4