Annual report pursuant to Section 13 and 15(d)

SEGMENT REPORTING (Revenue from External Customers by Products and Services) (Details)

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12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
betfred reviewsDec. 31, 2016
Revenue from External Customer [Line Items]      
Concentration Risk, Percentage 100.00% 100.00% 100.00%
Iron Ore Revenue [Member]      
Revenue from External Customer [Line Items]      
Concentration Risk, Percentage 93.00% 88.00% 89.00%
Freight and Venture Partners' Cost Reimbursements [Member]      
Revenue from External Customer [Line Items]      
Concentration Risk, Percentage 7.00% 12.00% 11.00%