Employee Benefit Plans (Estimated Future Benefit Payments) (Details) $ in Millions	Dec. 31, 2023 USD ($)
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2019	$ 100.6
2020	99.1
2021	97.5
2022	105.2
2023	100.8
Thereafter	521.4
Total	1,024.6
Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2019	13.8
2020	13.8
2021	13.7
2022	13.1
2023	12.4
Thereafter	50.5
Total	$ 117.3