Defined Benefit and Postretirement Benefits (Expected Contributions to Pension and Postretirement Plans) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contributions in 2023	$ 1.9
Amounts contributed during the six months ended June 30, 2023	1.2
Postretirement
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contributions in 2023	1.8
Amounts contributed during the six months ended June 30, 2023	$ 1.7