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Other Commitments And Contingencies (Narrative) (Details)
$ in Millions
Aug. 02, 2022
USD ($)
Jun. 30, 2022
USD ($)
Rate
Dec. 31, 2021
USD ($)
Other Commitments And Contingencies [Line Items]      
Guaranty Liabilities   $ 485.2 $ 288.9
Recorded reserves to cover environmental remediation at various sites   $ 98.2 91.1
Wind Power Purchase Agreement, Purchase Percentage | Rate   100.00%  
Subsequent Event      
Other Commitments And Contingencies [Line Items]      
Guaranty Liabilities $ 796.5    
MGP Sites      
Other Commitments And Contingencies [Line Items]      
Number of waste disposal sites identified by program   53  
Liability for Estimated Remediation Costs   $ 91.9 85.1
Reasonably possible remediation costs variance from reserve   17.0  
Standby Letters of Credit      
Other Commitments And Contingencies [Line Items]      
Long-term Line of Credit   $ 14.7 $ 18.9