Income Taxes - Schedule of Pre-Tax Income (Loss) and Effective Income Tax Rates (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Tax Examination [Line Items]
Pre-Tax Income (Loss)	$ (166.7)	$ (29.3)	$ (121.2)	$ (75.2)
Effective Tax Rate	20.60%	(60.10%)	22.50%	(4.40%)
Bermuda
Income Tax Examination [Line Items]
Pre-Tax Income (Loss)	$ 0.0	$ (9.8)	$ 0.0	$ (21.1)
Effective Tax Rate	0.00%	0.00%	0.00%	0.00%
United States
Income Tax Examination [Line Items]
Pre-Tax Income (Loss)	$ (163.9)	$ (18.1)	$ (114.1)	$ (31.2)
Effective Tax Rate	21.00%	(95.50%)	23.90%	(32.90%)
United Kingdom
Income Tax Examination [Line Items]
Pre-Tax Income (Loss)	$ (2.1)	$ (1.6)	$ (4.4)	$ (23.2)
Effective Tax Rate	0.00%	(22.50%)	0.00%	30.40%
Barbados
Income Tax Examination [Line Items]
Pre-Tax Income (Loss)	$ 0.0	$ 0.1	$ 0.0	$ 0.1
Effective Tax Rate	0.00%	0.00%	0.00%	0.00%
United Arab Emirates
Income Tax Examination [Line Items]
Pre-Tax Income (Loss)			$ 0.0	$ 0.3
Effective Tax Rate			0.00%	0.00%
Ireland
Income Tax Examination [Line Items]
Pre-Tax Income (Loss)	$ 0.0	$ 0.1	$ 0.0	$ (0.1)
Effective Tax Rate	0.00%	0.00%	0.00%	0.00%
Italy
Income Tax Examination [Line Items]
Pre-Tax Income (Loss)	$ (0.7)	$ 0.2	$ (2.7)	$ 0.1
Effective Tax Rate	0.00%	20.00%	(1.40%)	50.30%