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Equity - Share buyback program (Details) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
IfrsStatementLineItems [Line Items] |  |  |  |  |  |
Number of shares repurchased | [1] |  |  |  | 178,815,500 |
Purchase of treasury shares |  | $ 1,291 |  | [1] | $ 3,251 | [1]
Share buyback program number of shares authorized to be repurchased | [1] |  | 141,158,533 |  | 249,259,298 |
Share buyback program number of value authorized to be repurchased | [1] |  | $ 2,124 |  | $ 4,384 |
Acquired Parent [Member] |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |
Number of shares repurchased | [2] |  | 73,179,052 |  | 32,416,000 |
Purchase of treasury shares | [2] |  | $ 1,102 |  | $ 527 |
Acquired By Wholly Owned Subsidiaries [Member] |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |
Number of shares repurchased | [2] |  | 67,979,481 |  | 38,027,798 |
Purchase of treasury shares | [2] |  | $ 1,022 |  | $ 606 |
Shares Buyback Program [Member] |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |
Number of shares repurchased | [2] |  | 141,158,533 |  | 70,443,798 |
Shares Buyback Program 1 [Member] |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |
Purchase of treasury shares | [2] |  | $ 2,124 |  | $ 1,133 |
Acquired Parent 1 [Member] |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |
Number of shares repurchased | [1] |  |  |  | 81,855,600 |
Purchase of treasury shares | [1] |  |  |  | $ 1,501 |
Acquired By Wholly Owned Subsidiaries 1 [Member] |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |
Number of shares repurchased | [1] |  |  |  | 96,959,900 |
Purchase of treasury shares | [1] |  |  |  | $ 1,750 |
[1] | On April 1, 2021, the Board of Directors approved the common shares buyback program, limited to a maximum of 270,000,000 common shares or their respective ADRs. Continuing the previous program, the Board of Directors approved a new shares buyback program on October 28, 2021, with a limit of up to 200,000,000 common shares or their respective ADRs. Both programs were concluded in 2022.
[2] | On April 27, 2022, the Board of Directors approved the common shares buyback program, limited to a maximum of 500,000,000 common shares or their respective ADRs.

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