Quarterly report pursuant to Section 13 or 15(d)

ACQUISITIONS - ArcelorMittal USA Allocation of Consideration (Details)

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ACQUISITIONS - ArcelorMittal USA Allocation of Consideration (Details) - USD ($)
$ in Millions
4 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Dec. 09, 2020
Purchase Price Allocation to Net Assets      
Goodwill $ 994 $ 1,406  
ArcelorMittal USA      
Purchase Price Allocation to Net Assets      
Cash and cash equivalents 35   $ 35
Measurement Period Adjustments, Cash and cash equivalents 0    
Accounts receivable, net 349   349
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable 0    
Inventories 2,129   2,115
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory 14    
Other current assets 29   34
Measurement Period Adjustments, Other current assets (5)    
Property, plant and equipment 4,383   4,017
Measurement Period Adjustments, Property, plant, and equipment 366    
Other non-current assets 166   158
Measurement Period Adjustments, Other non-current assets 8    
Accounts payable (756)   (758)
Measurement Period Adjustments, Accounts payable 2    
Accrued employment costs (274)   (271)
Measurement Period Adjustments, Accrued employment costs (3)    
Pension and OPEB liabilities, current (109)   (109)
Measurement Period Adjustments, Pension and OPEB liabilities, current 0    
Other current liabilities (400)   (398)
Measurement Period Adjustments, Other current liabilities (2)    
Pension and OPEB liabilities, non-current (3,195)   (3,195)
Measurement Period Adjustments, Pension and OPEB liabilities, noncurrent 0    
Other non-current liabilities (563)   (598)
Measurement Period Adjustments, Other non-current liabilities 35    
Noncontrolling interest (12)   (13)
Measurement Period Adjustments, Noncontrolling interest 1    
Net identifiable assets acquired 1,782   1,366
Measurement Period Adjustments, Net identifiable assets acquired 416    
Goodwill 818   1,230
Measurement Period Adjustments, Goodwill (412)    
Total net assets acquired 2,600   $ 2,596
Measurement Period Adjustments, Total net assets acquired $ 4