Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Gross Carrying Amount	$ 96.0	$ 97.5
Accumulated Amortization	(31.6)	(26.4)
Definite-lived intangible assets, Net Carrying Amount	64.4	71.1
Indefinite-lived intangible assets, Net Carrying Amount	2,347.3	2,347.3
Total intangible assets	$ 2,411.7	$ 2,418.4