Leases, Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Lease Cost	$ 19.6	$ 35.2	$ 48.6
Sublease Income	1.1	1.0	1.3
Total Lease Cost	18.5	34.2	47.3
Cash Paid for Amounts Included in the Measurement of Lease Liabilities	$ 23.1	$ 29.9	$ 30.8
Weighted-Average Remaining Lease Term	6 years	6 years	6 years
Weighted-Average Discount Rate	4.32%	4.45%	4.37%