Quarterly report pursuant to Section 13 or 15(d)

SUPPLEMENTARY GUARANTOR INFORMATION (Supplementary Statements of Condensed Consolidating Financial Position) (Details)

v3.19.2
SUPPLEMENTARY GUARANTOR INFORMATION (Supplementary Statements of Condensed Consolidating Financial Position) (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Cash and cash equivalents $ 377.2   $ 823.2 $ 802.5 $ 978.3
Accounts receivable, net 193.1   226.7    
Inventories 219.0   87.9    
Supplies and other inventories 110.8   93.2    
Derivative assets 118.3   91.5    
Income tax receivable, current 58.7   117.3    
Other current assets 42.3   39.8    
TOTAL CURRENT ASSETS 1,119.4   1,479.6    
PROPERTY, PLANT AND EQUIPMENT, NET 1,597.3   1,286.0    
Deposits for property, plant and equipment 52.2   83.0    
Income tax receivable, non-current 62.7   121.3    
Deferred income tax assets 443.3   464.8    
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 0.0   0.0    
Long-term intercompany notes 0.0   0.0    
Other non-current assets 118.3   94.9    
TOTAL OTHER ASSETS 676.5   764.0    
TOTAL ASSETS 3,393.2   3,529.6    
Accounts payable 188.1   186.8    
Accrued employment costs 58.4   74.0    
Accrued interest 31.3   38.4    
Partnership distribution payable 44.1   43.5    
Other current liabilities 115.5   125.5    
TOTAL CURRENT LIABILITIES 437.4   468.2    
PENSION AND POSTEMPLOYMENT BENEFIT LIABILITIES 239.3   248.7    
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS 176.7   172.0    
LONG-TERM DEBT 2,104.5   2,092.9    
LONG-TERM INTERCOMPANY NOTES 0.0   0.0    
OTHER LIABILITIES 149.7   123.6    
TOTAL LIABILITIES 3,107.6   3,105.4    
TOTAL EQUITY 285.6 $ 261.7 424.2    
TOTAL LIABILITIES AND EQUITY 3,393.2   3,529.6    
Consolidation, Eliminations [Member]          
Cash and cash equivalents 0.0   0.0 0.0 0.0
Accounts receivable, net (4.1)   (4.1)    
Inventories 0.0   0.0    
Supplies and other inventories 0.0   0.0    
Derivative assets 0.0   0.0    
Income tax receivable, current 0.0   0.0    
Other current assets 0.0   0.0    
TOTAL CURRENT ASSETS (4.1)   (4.1)    
PROPERTY, PLANT AND EQUIPMENT, NET 0.0   0.0    
Deposits for property, plant and equipment 0.0   0.0    
Income tax receivable, non-current 0.0   0.0    
Deferred income tax assets 0.0   0.0    
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures (1,736.4)   (1,313.1)    
Long-term intercompany notes (121.3)   (121.3)    
Other non-current assets 0.0   0.0    
TOTAL OTHER ASSETS (1,857.7)   (1,434.4)    
TOTAL ASSETS (1,861.8)   (1,438.5)    
Accounts payable (4.1)   (4.1)    
Accrued employment costs 0.0   0.0    
Accrued interest 0.0   0.0    
Partnership distribution payable 0.0   0.0    
Other current liabilities 0.0   0.0    
TOTAL CURRENT LIABILITIES (4.1)   (4.1)    
PENSION AND POSTEMPLOYMENT BENEFIT LIABILITIES 0.0   0.0    
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS 0.0   0.0    
LONG-TERM DEBT 0.0   0.0    
LONG-TERM INTERCOMPANY NOTES (121.3)   (121.3)    
OTHER LIABILITIES 0.0   0.0    
TOTAL LIABILITIES (125.4)   (125.4)    
TOTAL EQUITY (1,736.4)   (1,313.1)    
TOTAL LIABILITIES AND EQUITY (1,861.8)   (1,438.5)    
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]          
Cash and cash equivalents 2.6   2.7 2.5 27.3
Accounts receivable, net 0.3   0.3    
Inventories 0.0   0.0    
Supplies and other inventories 0.0   0.0    
Derivative assets 0.0   0.0    
Income tax receivable, current 0.0   0.0    
Other current assets 9.7   12.9    
TOTAL CURRENT ASSETS 12.6   15.9    
PROPERTY, PLANT AND EQUIPMENT, NET 50.8   50.8    
Deposits for property, plant and equipment 14.8   14.6    
Income tax receivable, non-current 0.0   0.0    
Deferred income tax assets 1.2   1.2    
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 0.0   0.0    
Long-term intercompany notes 121.3   121.3    
Other non-current assets 1.4   1.5    
TOTAL OTHER ASSETS 138.7   138.6    
TOTAL ASSETS 202.1   205.3    
Accounts payable 4.2   4.2    
Accrued employment costs 0.1   0.1    
Accrued interest 0.0   0.0    
Partnership distribution payable 0.0   0.0    
Other current liabilities 7.2   8.2    
TOTAL CURRENT LIABILITIES 11.5   12.5    
PENSION AND POSTEMPLOYMENT BENEFIT LIABILITIES (239.5)   (230.0)    
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS 19.6   19.9    
LONG-TERM DEBT 0.0   0.0    
LONG-TERM INTERCOMPANY NOTES 0.0   0.0    
OTHER LIABILITIES 7.1   8.8    
TOTAL LIABILITIES (201.3)   (188.8)    
TOTAL EQUITY 403.4   394.1    
TOTAL LIABILITIES AND EQUITY 202.1   205.3    
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]          
Cash and cash equivalents 0.4   0.7 1.6 2.1
Accounts receivable, net 188.8   221.3    
Inventories 219.0   87.9    
Supplies and other inventories 110.8   93.2    
Derivative assets 118.1   91.4    
Income tax receivable, current 0.0   0.0    
Other current assets 24.1   16.9    
TOTAL CURRENT ASSETS 661.2   511.4    
PROPERTY, PLANT AND EQUIPMENT, NET 1,534.9   1,221.9    
Deposits for property, plant and equipment 37.4   68.4    
Income tax receivable, non-current 4.1   4.1    
Deferred income tax assets 0.0   0.0    
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 35.2   50.8    
Long-term intercompany notes 0.0   0.0    
Other non-current assets 100.8   85.4    
TOTAL OTHER ASSETS 177.5   208.7    
TOTAL ASSETS 2,373.6   1,942.0    
Accounts payable 180.2   181.4    
Accrued employment costs 42.2   45.4    
Accrued interest 0.0   0.0    
Partnership distribution payable 44.1   43.5    
Other current liabilities 82.1   86.7    
TOTAL CURRENT LIABILITIES 348.6   357.0    
PENSION AND POSTEMPLOYMENT BENEFIT LIABILITIES 414.8   414.4    
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS 157.1   152.1    
LONG-TERM DEBT 0.0   0.0    
LONG-TERM INTERCOMPANY NOTES 0.0   0.0    
OTHER LIABILITIES 120.1   99.5    
TOTAL LIABILITIES 1,040.6   1,023.0    
TOTAL EQUITY 1,333.0   919.0    
TOTAL LIABILITIES AND EQUITY 2,373.6   1,942.0    
Reportable Legal Entities [Member] | Cliffs Shareholders Equity [Member]          
Cash and cash equivalents 374.2   819.8 $ 798.4 $ 948.9
Accounts receivable, net 8.1   9.2    
Inventories 0.0   0.0    
Supplies and other inventories 0.0   0.0    
Derivative assets 0.2   0.1    
Income tax receivable, current 58.7   117.3    
Other current assets 8.5   10.0    
TOTAL CURRENT ASSETS 449.7   956.4    
PROPERTY, PLANT AND EQUIPMENT, NET 11.6   13.3    
Deposits for property, plant and equipment 0.0   0.0    
Income tax receivable, non-current 58.6   117.2    
Deferred income tax assets 442.1   463.6    
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 1,701.2   1,262.3    
Long-term intercompany notes 0.0   0.0    
Other non-current assets 16.1   8.0    
TOTAL OTHER ASSETS 2,218.0   1,851.1    
TOTAL ASSETS 2,679.3   2,820.8    
Accounts payable 7.8   5.3    
Accrued employment costs 16.1   28.5    
Accrued interest 31.3   38.4    
Partnership distribution payable 0.0   0.0    
Other current liabilities 26.2   30.6    
TOTAL CURRENT LIABILITIES 81.4   102.8    
PENSION AND POSTEMPLOYMENT BENEFIT LIABILITIES 64.0   64.3    
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS 0.0   0.0    
LONG-TERM DEBT 2,104.5   2,092.9    
LONG-TERM INTERCOMPANY NOTES 121.3   121.3    
OTHER LIABILITIES 22.5   15.3    
TOTAL LIABILITIES 2,393.7   2,396.6    
TOTAL EQUITY 285.6   424.2    
TOTAL LIABILITIES AND EQUITY $ 2,679.3   $ 2,820.8