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Annual report pursuant to Section 13 and 15(d)

SEGMENT REPORTING - Summary of Assets by Segment (Details)

v3.20.4
SEGMENT REPORTING - Summary of Assets by Segment (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items] Ìý Ìý
Assets $ 16,771 $ 3,504
Operating Segments [Member] Ìý Ìý
Segment Reporting Information [Line Items] Ìý Ìý
Assets 16,088 2,557
Steelmaking [Member] | Operating Segments [Member] Ìý Ìý
Segment Reporting Information [Line Items] Ìý Ìý
Assets 15,849 2,557
Other businesses | Operating Segments [Member] Ìý Ìý
Segment Reporting Information [Line Items] Ìý Ìý
Assets 239 0
Corporate and Other Segments [Member] Ìý Ìý
Segment Reporting Information [Line Items] Ìý Ìý
Assets $ 683 $ 947