Accounting Policies - Other Intangibles Assets (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Right-of-use asset impairment	$ 23.1	$ 23.1	$ 0.0	$ 0.0
Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life	8 years	8 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life	35 years	35 years