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Equity (Details 4) $ / shares in Units, Pure in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) year $ / shares | Dec. 31, 2020 USD ($) year $ / shares | Dec. 31, 2022 year $ / shares
Statement of changes in equity [abstract] |  |  |
Commitment for repurchase own shares | $ | $ 2,809 | $ 1,800 |
Maximal amount of share buyback programm | $ | $ 15,000 | $ 2,500 |
Written call options held by market maker | 3.0 | 1.0 | 3.0
Written call options, contractual live | year |  |  | 10
Written call options, contractual live, remaining | year | 2 | 3 | 1
Written call options, weighted average exercise price | $ / shares | $ 61.45 | $ 60.09 | $ 66.07
Number of options repurchased |  | (3.7) |

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