Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
SUPPLEMENTARY GUARANTOR INFORMATION (Supplementary Statements of Condensed Consolidating Financial Position) (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Dec. 31, 2017
Cash and cash equivalents $ 399.3     $ 823.2 $ 897.1 $ 978.3
Accounts receivable, net 164.9     226.7    
Finished goods inventories 162.2     77.8    
Work-in-process inventories 55.2     10.1    
Supplies and other inventories 110.8     93.2    
Derivative assets 72.8     91.5    
Income tax receivable, current 58.7     117.3    
Other current assets 40.7     39.8    
TOTAL CURRENT ASSETS 1,064.6     1,479.6    
PROPERTY, PLANT AND EQUIPMENT, NET 1,769.9     1,286.0    
Deposits for property, plant and equipment 41.6     83.0    
Income tax receivable, non-current 62.7     121.3    
Deferred income taxes 437.5     464.8    
Investment in subsidiaries 0.0     0.0    
Long-term intercompany notes 0.0     0.0    
Other non-current assets 114.9     94.9    
TOTAL OTHER ASSETS 656.7     764.0    
TOTAL ASSETS 3,491.2     3,529.6    
Accounts payable 212.8     186.8    
Accrued employment costs 57.3     74.0    
Accrued interest 34.1     38.4    
Derivative liabilities 32.6     3.7    
Partnership distribution payable 0.0     43.5    
Other current liabilities 121.7     121.8    
TOTAL CURRENT LIABILITIES 458.5     468.2    
PENSION AND POSTEMPLOYMENT BENEFIT LIABILITIES 233.2     248.7    
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS 179.1     172.0    
LONG-TERM DEBT 2,109.1     2,092.9    
LONG-TERM INTERCOMPANY NOTES 0.0     0.0    
OTHER LIABILITIES 151.4     123.6    
TOTAL LIABILITIES 3,131.3     3,105.4    
TOTAL EQUITY 359.9 $ 285.6 $ 261.7 424.2    
TOTAL LIABILITIES AND EQUITY 3,491.2     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)    
Finished goods inventories 0.0     0.0    
Work-in-process 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 taxes 0.0     0.0    
Investment in subsidiaries (1,820.2)     (1,313.1)    
Long-term intercompany notes (121.3)     (121.3)    
Other non-current assets 0.0     0.0    
TOTAL OTHER ASSETS (1,941.5)     (1,434.4)    
TOTAL ASSETS (1,945.6)     (1,438.5)    
Accounts payable (4.1)     (4.1)    
Accrued employment costs 0.0     0.0    
Accrued interest 0.0     0.0    
Derivative liabilities 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 (1,820.2)     (1,313.1)    
TOTAL LIABILITIES AND EQUITY (1,945.6)     (1,438.5)    
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]            
Cash and cash equivalents 2.7     2.7 2.7 27.3
Accounts receivable, net 0.2     0.3    
Finished goods inventories 0.0     0.0    
Work-in-process 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 8.5     12.9    
TOTAL CURRENT ASSETS 11.4     15.9    
PROPERTY, PLANT AND EQUIPMENT, NET 50.8     50.8    
Deposits for property, plant and equipment 14.5     14.6    
Income tax receivable, non-current 0.0     0.0    
Deferred income taxes 1.2     1.2    
Investment in subsidiaries 0.0     0.0    
Long-term intercompany notes 121.3     121.3    
Other non-current assets 1.3     1.5    
TOTAL OTHER ASSETS 138.3     138.6    
TOTAL ASSETS 200.5     205.3    
Accounts payable 4.4     4.2    
Accrued employment costs 0.1     0.1    
Accrued interest 0.0     0.0    
Derivative liabilities 0.0     0.0    
Partnership distribution payable 0.0     0.0    
Other current liabilities 7.3     8.2    
TOTAL CURRENT LIABILITIES 11.8     12.5    
PENSION AND POSTEMPLOYMENT BENEFIT LIABILITIES (244.3)     (230.0)    
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS 19.4     19.9    
LONG-TERM DEBT 0.0     0.0    
LONG-TERM INTERCOMPANY NOTES 0.0     0.0    
OTHER LIABILITIES 6.1     8.8    
TOTAL LIABILITIES (207.0)     (188.8)    
TOTAL EQUITY 407.5     394.1    
TOTAL LIABILITIES AND EQUITY 200.5     205.3    
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]            
Cash and cash equivalents 0.4     0.7 1.9 2.1
Accounts receivable, net 161.4     221.3    
Finished goods inventories 162.2     77.8    
Work-in-process inventories 55.2     10.1    
Supplies and other inventories 110.8     93.2    
Derivative assets 72.8     91.4    
Income tax receivable, current 0.0     0.0    
Other current assets 22.9     16.9    
TOTAL CURRENT ASSETS 585.7     511.4    
PROPERTY, PLANT AND EQUIPMENT, NET 1,706.8     1,221.9    
Deposits for property, plant and equipment 27.1     68.4    
Income tax receivable, non-current 4.1     4.1    
Deferred income taxes 0.0     0.0    
Investment in subsidiaries 39.7     50.8    
Long-term intercompany notes 0.0     0.0    
Other non-current assets 98.0     85.4    
TOTAL OTHER ASSETS 168.9     208.7    
TOTAL ASSETS 2,461.4     1,942.0    
Accounts payable 207.8     181.4    
Accrued employment costs 40.1     45.4    
Accrued interest 0.0     0.0    
Derivative liabilities 30.2     0.0    
Partnership distribution payable 0.0     43.5    
Other current liabilities 75.9     86.7    
TOTAL CURRENT LIABILITIES 354.0     357.0    
PENSION AND POSTEMPLOYMENT BENEFIT LIABILITIES 414.2     414.4    
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS 159.7     152.1    
LONG-TERM DEBT 0.0     0.0    
LONG-TERM INTERCOMPANY NOTES 0.0     0.0    
OTHER LIABILITIES 120.8     99.5    
TOTAL LIABILITIES 1,048.7     1,023.0    
TOTAL EQUITY 1,412.7     919.0    
TOTAL LIABILITIES AND EQUITY 2,461.4     1,942.0    
Reportable Legal Entities [Member] | Cliffs Shareholders Equity [Member]            
Cash and cash equivalents 396.2     819.8 $ 892.5 $ 948.9
Accounts receivable, net 7.4     9.2    
Finished goods inventories 0.0     0.0    
Work-in-process inventories 0.0     0.0    
Supplies and other inventories 0.0     0.0    
Derivative assets 0.0     0.1    
Income tax receivable, current 58.7     117.3    
Other current assets 9.3     10.0    
TOTAL CURRENT ASSETS 471.6     956.4    
PROPERTY, PLANT AND EQUIPMENT, NET 12.3     13.3    
Deposits for property, plant and equipment 0.0     0.0    
Income tax receivable, non-current 58.6     117.2    
Deferred income taxes 436.3     463.6    
Investment in subsidiaries 1,780.5     1,262.3    
Long-term intercompany notes 0.0     0.0    
Other non-current assets 15.6     8.0    
TOTAL OTHER ASSETS 2,291.0     1,851.1    
TOTAL ASSETS 2,774.9     2,820.8    
Accounts payable 4.7     5.3    
Accrued employment costs 17.1     28.5    
Accrued interest 34.1     38.4    
Derivative liabilities 2.4     3.7    
Partnership distribution payable 0.0     0.0    
Other current liabilities 38.5     26.9    
TOTAL CURRENT LIABILITIES 96.8     102.8    
PENSION AND POSTEMPLOYMENT BENEFIT LIABILITIES 63.3     64.3    
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS 0.0     0.0    
LONG-TERM DEBT 2,109.1     2,092.9    
LONG-TERM INTERCOMPANY NOTES 121.3     121.3    
OTHER LIABILITIES 24.5     15.3    
TOTAL LIABILITIES 2,415.0     2,396.6    
TOTAL EQUITY 359.9     424.2    
TOTAL LIABILITIES AND EQUITY $ 2,774.9     $ 2,820.8