Pension and Other Post Retirement Plans (Details 4) $ in Millions	Dec. 31, 2019 USD ($)
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 39.2
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	42.7
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	46.2
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	49.2
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	52.2
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	295.3
Pension Plan [Member] | UNITED KINGDOM
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	0.8
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	0.9
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	0.9
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	0.9
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	0.9
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	4.8
Other Benefits [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	7.3
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	6.7
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	5.5
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	5.0
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	4.2
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 15.1