Pension and Other Post Retirement Plans (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		100.00%
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 0.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	0.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	0.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	0.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	0.1
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	0.4
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.0	$ (73.5)	$ 0.0
UNITED STATES | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	7.8
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	6.8
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	6.0
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	5.7
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	4.9
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	10.8
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.8	$ 0.8	$ 0.8
UNITED STATES | Defined Benefit Plan, Equity Securities, US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		71.00%
Belfast | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	55.2
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	58.8
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	64.3
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	68.9
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	75.8
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	458.6
Belfast | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	0.0
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	0.0
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	0.0
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	0.0
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	0.0
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 0.1
Belfast | Defined Benefit Plan, Real Assets
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	39.00%	76.00%
Belfast | Other Debt Obligations
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	53.00%	21.00%
Belfast | Money Market Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	8.00%	3.00%
UNITED KINGDOM
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%	100.00%
UNITED KINGDOM | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 0.9
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	1.0
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	1.3
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	1.5
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	1.7
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 9.4
UNITED KINGDOM | Defined Benefit Plan, Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	15.00%	15.00%
UNITED KINGDOM | Defined Benefit Plan, Debt Security
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	80.00%	80.00%
UNITED KINGDOM | Defined Benefit Plan, Real Estate
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	5.00%	5.00%