Pension Benefits and Postretirement Benefits Other Than Pensions - Pension Income (Details) - Pension Plans - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Interest Cost on Projected Benefit Obligation	$ 3.5	$ 2.1	$ 6.9	$ 4.3
Expected Return on Plan Assets	(3.2)	(1.8)	(6.5)	(3.7)
Amortization of Prior Service Credit	0.1	0.1	0.3	0.3
Amortization of Net Actuarial Loss	0.0	0.5	0.0	0.9
Total Pension Expense	$ 0.4	$ 0.9	$ 0.7	$ 1.8