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Equity-based participation plans for employees (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Expense from share-based payment transactions with employees $ 1,048 $ 979 $ 958
Liabilities from share-based payment transactions $ 235 $ 253 $ 269