Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Document Fiscal Year Focus	2022
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowance	$ 39.7	$ 39.1	$ 98.0
Allowance for doubtful accounts receivable	1.1	0.2	1.6
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Period Increase (Decrease)	1.0
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	0.2	1.6	0.8
Charged to Cost and Expense		(0.2)	(0.8)
Accounts Written off / Reductions	(0.1)	(1.2)	0.0
Balance at End of Year		0.2	1.6
Deferred Tax Valuation Allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	39.1	98.0	85.3
Additions	0.6	0.0	12.7
Accounts Written off / Reductions	$ 0.0	(58.9)	0.0
Balance at End of Year		$ 39.1	$ 98.0