Quarterly report pursuant to Section 13 or 15(d)

Investments, At Equity, And Advances To 50% Or Less Owned Companies (Narrative) (Details)

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Investments, At Equity, And Advances To 50% Or Less Owned Companies (Narrative) (Details)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
vessel
equipment
Inland River Towboats  
Schedule Of Equity Method Investments [Line Items]  
Equipment Subject to Operating Lease, Number of Units | equipment 4
Trailer Bridge | U.S.-flag Offshore Tug  
Schedule Of Equity Method Investments [Line Items]  
Equipment Subject to Operating Lease, Number of Units 1
KSM | Foreign-flag Harbor Tugs  
Schedule Of Equity Method Investments [Line Items]  
Equipment Subject to Operating Lease, Number of Units 2
Number of equipment operated 4
KSM | Foreign-flag Ocean Liquid Tank Barge  
Schedule Of Equity Method Investments [Line Items]  
Number of equipment operated 1
KSM | Foreign-flag Specialty Vessel  
Schedule Of Equity Method Investments [Line Items]  
Number of equipment operated 2
SCF Bunge Marine | Inland River Towboats  
Schedule Of Equity Method Investments [Line Items]  
Equipment Subject to Operating Lease, Number of Units 8
Other Inland Services Equity Method Investments  
Schedule Of Equity Method Investments [Line Items]  
Proceeds from Equity Method Investment, Distribution | $ $ 0.1
Time Charter | Trailer Bridge  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties | $ 1.0
Time Charter | SCF Bunge Marine  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties | $ 2.0
Bareboat Charter | KSM  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties | $ 0.4
Rental Income | Bunge SCF Grain  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties | $ $ 0.2