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Information by business segment and by geographic area - Assets by geographic area (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Information by business segment and by geographic area      
Investments in equity securities - Non-Current $ 1,751 $ 2,031 $ 2,798
Investments in associates and joint ventures 1,751 2,031  
Intangible 9,011 9,296 8,499
Property, plant and equipment 41,931 41,148 $ 46,576
Total 52,693 52,475  
Brazil      
Information by business segment and by geographic area      
Investments in associates and joint ventures 1,730 1,760  
Intangible 7,050 7,341  
Property, plant and equipment 23,793 23,364  
Total 32,573 32,465  
Canada      
Information by business segment and by geographic area      
Intangible 1,958 1,951  
Property, plant and equipment 12,441 11,798  
Total 14,399 13,749  
Americas, except Brazil and Canada      
Information by business segment and by geographic area      
Investments in associates and joint ventures   234  
Property, plant and equipment 3 5  
Total 3 239  
Europe      
Information by business segment and by geographic area      
Property, plant and equipment 739 894  
Total 739 894  
Indonesia      
Information by business segment and by geographic area      
Intangible 1 2  
Property, plant and equipment 2,723 2,729  
Total 2,724 2,731  
China      
Information by business segment and by geographic area      
Investments in associates and joint ventures   17  
Intangible 2 2  
Property, plant and equipment 21 19  
Total 23 38  
Asia, except Indonesia and China      
Information by business segment and by geographic area      
Investments in associates and joint ventures 21 20  
Property, plant and equipment 874 951  
Total 895 971  
Oman      
Information by business segment and by geographic area      
Property, plant and equipment 1,337 1,388  
Total $ 1,337 $ 1,388