Cleveland-Cliffs Inc. Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES Narrative (Details)

COMMITMENTS AND CONTINGENCIES Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Loss Contingencies [Line Items]
Loans to and accounts receivable from the Canadian Entities	$ 51.9		$ 51.9		$ 48.6
Contingent claims	50.0		50.0		0.0
Contingent Liabilities recognized in Consolidated Financials	0.0		0.0		37.2
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAX	32.3	$ (2.7)	(13.6)	$ (0.6)
Wabush Scully Mine Sale [Member]
Loss Contingencies [Line Items]
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAX	31.4
Michigan Electricity Matters [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual	13.6		13.6
Fair Value, Inputs, Level 3 [Member]
Loss Contingencies [Line Items]
Loans to and accounts receivable from the Canadian Entities					$ 48.6
Contingent Liabilities recognized in Consolidated Financials	$ 0.0		$ 0.0

- Definition

Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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