Quarterly report pursuant to Section 13 or 15(d)

SEGMENT REPORTING - Segment Assets (Details)

v3.21.2
SEGMENT REPORTING - Segment Assets (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]    
Total assets $ 17,746 $ 16,771
Corporate, Non-Segment    
Segment Reporting Information [Line Items]    
Total assets 456 683
Operating Segments    
Segment Reporting Information [Line Items]    
Total assets 17,290 16,088
Operating Segments | Steelmaking    
Segment Reporting Information [Line Items]    
Total assets 16,966 15,849
Operating Segments | Other Businesses    
Segment Reporting Information [Line Items]    
Total assets $ 324 $ 239