Pension and Other Post Retirement Plans (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
UNITED STATES | Other Benefits [Member]
Components of net periodic benefit cost (income):
Service cost	$ 0.6	$ 0.7	$ 0.8
Interest cost	1.5	0.6	0.3
Expected return on plan assets	0.0	0.0	0.0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(0.8)	(0.8)	(0.8)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0.0	0.0	0.0
Net periodic benefit cost (income)	(0.4)	(0.5)	(1.0)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	11.2	(0.4)	3.2
Defined Benefit Plan, Amortization of Gain (Loss)	1.7	1.0	1.3
Other changes recognized in OCI:
Total recognized in net periodic benefit cost and OCI	$ (10.8)	$ (0.9)	$ 2.2
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.03%	1.96%	1.26%
Medical Assumptions:
Trend assumed for the year	6.77%	7.25%
Ultimate trend rate	4.00%	4.00%
Year that ultimate trend rate is reached	2048	2048
UNITED STATES | Pension Plan [Member]
Components of net periodic benefit cost (income):
Service cost	$ 0.0	$ 0.0	$ 0.0
Interest cost	2.6	20.8	18.7
Expected return on plan assets	(1.6)	(44.0)	(57.7)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.0	73.5	0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	59.6	33.3	11.0
Net periodic benefit cost (income)	60.7	83.6	(28.0)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(72.5)	124.4	(58.2)
Defined Benefit Plan, Amortization of Gain (Loss)	(0.1)	0.0	0.0
Other changes recognized in OCI:
Total recognized in net periodic benefit cost and OCI	$ 11.8	$ 208.0	$ (86.2)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.22%	2.72%	2.31%
Total recognized in other net periodic benefit and OCI loss (income)
Expected return on plan assets		4.00%	4.00%
UNITED KINGDOM | Pension Plan [Member]
Components of net periodic benefit cost (income):
Service cost	$ 0.8	$ 1.7	$ 1.2
Interest cost	1.7	1.1	1.0
Expected return on plan assets	(2.2)	(1.7)	(1.4)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0.0	0.6	(0.2)
Net periodic benefit cost (income)	0.5	1.7	0.6
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	0.6	13.9	1.2
Defined Benefit Plan, Amortization of Gain (Loss)	(0.2)
Other changes recognized in OCI:
Total recognized in net periodic benefit cost and OCI	$ (1.1)	$ 15.6	$ 1.8
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.90%	1.75%	1.45%
Total recognized in other net periodic benefit and OCI loss (income)
Expected return on plan assets	4.90%	2.00%	1.40%
Salary increases		3.35%