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Equity affiliates, other investments and related parties - Contribution of equity affiliates (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Equity value      
Total Associates $ 15,745 $ 17,026 $ 13,330
Total Joint ventures 7,102 6,097 5,359
Total Equity value 22,847 23,123 18,689
Loans 5,129 3,999 4,755
Total Equity value and Loans 27,976 27,122 23,444
Profit/(loss)      
Total Associates 753 2,534 2,329
Total Joint ventures (301) 872 841
Total share of profit/(loss) of equity affiliates 452 3,406 3,170
Other comprehensive income      
Total Associates (1,704) 592 (461)
Total Joint ventures (127) (184) (79)
Share of other comprehensive income of equity affiliates, net amount $ (1,831) $ 408 $ (540)