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Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS - Pro Forma (Details)

v3.22.4
ACQUISITIONS - Pro Forma (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
ArcelorMittal USA and AK Steel Ìý Ìý
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Ìý Ìý
Revenues, pro forma Ìý $ 12,837
Net income (loss) attributable to Cliffs shareholders, pro forma Ìý (520)
Expenses, pro forma Ìý $ 32
Statutory tax rate, pro forma Ìý 24.30%
Income tax benefit (expense), pro forma Ìý $ 170
ArcelorMittal USA and AK Steel | Intersegment Eliminations Ìý Ìý
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Ìý Ìý
Revenues, pro forma Ìý 844
Ferrous Processing and Trading Ìý Ìý
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Ìý Ìý
Revenues, pro forma $ 21,701 13,549
Net income (loss) attributable to Cliffs shareholders, pro forma $ 3,074 (526)
Franchise | ArcelorMittal USA and AK Steel Ìý Ìý
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Ìý Ìý
Net income (loss) attributable to Cliffs shareholders, pro forma Ìý 140
Fair Value Adjustment to Inventory | ArcelorMittal USA and AK Steel Ìý Ìý
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Ìý Ìý
Net income (loss) attributable to Cliffs shareholders, pro forma Ìý 96
Acquisition-related costs | ArcelorMittal USA and AK Steel Ìý Ìý
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Ìý Ìý
Net income (loss) attributable to Cliffs shareholders, pro forma Ìý 93
Restructuring Costs | ArcelorMittal USA Ìý Ìý
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Ìý Ìý
Net income (loss) attributable to Cliffs shareholders, pro forma Ìý $ 1,820