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Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS - Narrative (Details)

v3.22.0.1
ACQUISITIONS - Narrative (Details)
$ in Millions
1 Months Ended 12 Months Ended 13 Months Ended
Mar. 13, 2020
Dec. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
segment
Dec. 31, 2019
USD ($)
Dec. 31, 2021
USD ($)
Business Acquisition [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý
Number of businesses acquired | segment Ìý Ìý Ìý 2 Ìý Ìý
Revenues Ìý Ìý $ 20,444 $ 5,354 $ 1,990 Ìý
Net loss attributable to acquisition Ìý Ìý 2,988 (122) 293 Ìý
Amortization of inventory step-up Ìý Ìý 161 96 0 Ìý
Acquisition-related costs Ìý Ìý 20 90 $ 7 Ìý
Ferrous Processing and Trading Ìý Ìý Ìý Ìý Ìý Ìý
Business Acquisition [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý
Revenues Ìý $ 153 Ìý Ìý Ìý Ìý
Net loss attributable to acquisition Ìý 18 Ìý Ìý Ìý Ìý
Amortization of inventory step-up Ìý $ 22 Ìý Ìý Ìý Ìý
Acquisition-related costs Ìý Ìý 1 Ìý Ìý Ìý
ArcelorMittal USA Ìý Ìý Ìý Ìý Ìý Ìý
Business Acquisition [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý
Acquisition-related costs Ìý Ìý 3 26 Ìý Ìý
Revaluation of equity method investment Ìý Ìý Ìý Ìý Ìý $ 31
AK Steel Ìý Ìý Ìý Ìý Ìý Ìý
Business Acquisition [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý
Acquisition-related costs Ìý Ìý $ 1 $ 26 Ìý Ìý
Exchange ratio 0.400 Ìý Ìý Ìý Ìý Ìý