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Non-current assets and liabilities held for sales and discontinued operations - Fair values of identifiable assets acquired and liabilities assumed as a result of the acquisition (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 22, 2021
Dec. 31, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2018
Disclosures          
Cash and cash equivalents   $ (7,350) $ (11,721) $ (13,487) $ (5,784)
Net cash outflow   $ 926      
Discontinued operations | Nacala Logistics Corridor          
Disclosures          
Cash and cash equivalents $ 172        
Inventory, recoverable tax, and other assets 423        
Intangible 2,219        
Property, plant and equipment 1,363        
Assumed liabilities (158)        
Net identifiable assets acquired 4,019        
Fair value adjustments (i) (1,590)        
Total identifiable net assets at fair value 2,429        
Pre-existing relationship (Loans receivable from NLC) 859        
Loss on pre-existing relationship (771)        
Total identifiable net assets at fair value 2,517        
Cash consideration 2,517        
Cash and cash equivalents (172)        
Net cash outflow 2,345        
Property, plant and equipment, fair value adjustments 441        
Intangible assets, fair value adjustments $ 791