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Discontinued Operations (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 29, 2020
Aug. 14, 2020
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Impairment charge           $ 19.2
Logistics [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Cash proceeds from sale of business   $ 6.2     $ 6.2  
Rail Lease [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Cash proceeds from sale of business $ 228.1     $ 228.1    
Rail Lease [Member] | Discontinued Operations, Held-for-sale [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Estimated useful life     40 years      
Residual value percentage     10.00%