Income Taxes - Net Operating Loss and Tax Credit Carryforwards (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Tax Credit Carryforward [Line Items]
Excess interest	$ 11.9
Other deferred tax assets	3.4
Total tax carryforwards	166.2
Valuation Allowance
Excess interest	(2.6)
Other deferred tax assets	(3.4)
Total tax carryforwards	(107.3)
Domestic Tax Authority
Tax Credit Carryforward [Line Items]
Net operating loss not subject to expiration	0.2
Net operating loss subject to expiration	0.1
Tax credit carryforward	53.8
Alternative minimum tax credit	0.8
Valuation Allowance
Net operating loss not subject to expiration	(0.2)
Net operating loss subject to expiration	(0.1)
Tax credit carryforward	(53.8)
Alternative minimum tax credit		$ (0.1)
Domestic Tax Authority | Capital Loss Carryforward
Tax Credit Carryforward [Line Items]
Capital loss	24.8
Tax credit carryforward	0.0
Valuation Allowance
Capital loss	0.0
Tax credit carryforward	0.0
State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Net operating loss subject to expiration	2.8
Tax credit carryforward	0.3
Valuation Allowance
Net operating loss subject to expiration	(0.4)
Tax credit carryforward	0.0
State and Local Jurisdiction | Capital Loss Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward	0.5
Valuation Allowance
Tax credit carryforward	0.0
Non U.S. Tax Authority
Tax Credit Carryforward [Line Items]
Net operating loss not subject to expiration	67.0
Valuation Allowance
Net operating loss not subject to expiration	(46.1)
Non U.S. Tax Authority | Capital Loss Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward	0.6
Valuation Allowance
Tax credit carryforward	$ (0.6)