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Inventories (Tables)
 12 Months Ended
Dec. 31, 2020
Inventories Disclosure [abstract]  
Inventories by class
(USD millions)
2020
2019
Raw material, consumables
967
751
Work in progress
3 324
3 024
Finished products
2 840
2 207
Total inventories
7 131
5 982
Amount of inventory recognized as an expense in cost of goods sold
(USD billions)
2020
2019
2018
Cost of goods sold
– 8.5
– 8.5
– 8.3
Recognized amount of inventory provisions and reversals of inventory provision
(USD millions)
2020
2019
2018
Inventory provisions
– 702
– 752
– 603
Reversals of inventory provisions
255
218
216