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Employee benefits (Details 10) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
IfrsStatementLineItems [Line Items] |  |
Unquoted prices, fair value | $ 10,252 |
Fair value of plan assets | $ 14,384 | $ 12,559
Percentage, fair value | 100.00% | 100.00%
Quoted prices in active markets, fair value | $ 4,132 |
Quoted prices in active markets | 4,132 |
Unquoted prices | 9,946 |
Total fair value | $ 14,078 | $ 12,274
Percentage | 98.00% | 98.00%
Receivables [member] |  |
IfrsStatementLineItems [Line Items] |  |
Unquoted prices, fair value | $ 1,466 |
Fair value of plan assets | $ 1,466 | $ 1,353
Percentage, fair value | 10.00% | 11.00%
Fixed income [member] |  |
IfrsStatementLineItems [Line Items] |  |
Unquoted prices, fair value | $ 7,698 |
Fair value of plan assets | $ 10,910 | $ 8,845
Percentage, fair value | 75.00% | 70.00%
Quoted prices in active markets, fair value | $ 3,212 |
Government bonds [member] |  |
IfrsStatementLineItems [Line Items] |  |
Unquoted prices, fair value | 7,694 |
Fair value of plan assets | 9,450 | $ 7,450
Quoted prices in active markets, fair value | 1,756 |
Fixed income fund [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of plan assets | 786 | 864
Quoted prices in active markets, fair value | 786 |
Other investment [member] |  |
IfrsStatementLineItems [Line Items] |  |
Unquoted prices, fair value | 4 |
Fair value of plan assets | 674 | 531
Quoted prices in active markets, fair value | 670 |
Variable income [member] |  |
IfrsStatementLineItems [Line Items] |  |
Unquoted prices, fair value | 210 |
Fair value of plan assets | $ 945 | $ 1,427
Percentage, fair value | 5.00% | 9.00%
Quoted prices in active markets, fair value | $ 735 |
Common and preferred shares [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of plan assets | 735 | $ 1,184
Quoted prices in active markets, fair value | 735 |
Other investment one [member] |  |
IfrsStatementLineItems [Line Items] |  |
Unquoted prices, fair value | 210 |
Fair value of plan assets | 210 | 243
Structured investments [member] |  |
IfrsStatementLineItems [Line Items] |  |
Unquoted prices, fair value | 31 |
Fair value of plan assets | $ 216 | $ 159
Percentage, fair value | 4.00% | 4.00%
Quoted prices in active markets, fair value | $ 185 |
Real estate properties [member] |  |
IfrsStatementLineItems [Line Items] |  |
Unquoted prices, fair value | 541 |
Fair value of plan assets | $ 541 | $ 490
Percentage, fair value | 4.00% | 4.00%
Loans to participants [member] |  |
IfrsStatementLineItems [Line Items] |  |
Unquoted prices, fair value | $ 306 |
Fair value of plan assets | $ 306 | $ 285
Percentage, fair value | 2.00% | 2.00%

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