Pension and Postretirement Benefits (Expected Contributions to Pension and Postretirement Plans) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contributions in 2024	$ 2.0
Amounts contributed during the three months ended March 31, 2024	0.8
Postretirement
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contributions in 2024	1.3
Amounts contributed during the three months ended March 31, 2024	$ 1.0