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Intangibles (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Sep. 30, 2024
IfrsStatementLineItems [Line Items] |  |  |
Balance at beginning of year | $ 11,631 | $ 10,238 |
Additions | 53 | 183 |
Disposals | (9) | 7 |
Amortization | (154) | 144 |
Translation adjustment | (1,326) | 731 |
Balance at end of year | 10,195 | 11,001 |
Balance at end of year | 10,195 | 11,001 | $ 10,195
Disposals | 9 | (7) |
Amortization | 154 | (144) |
Gross carrying amount [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Intangible assets and goodwill, cost | 12,314 | 13,116 |
Accumulated depreciation, amortisation and impairment [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Accumulated amortization | (2,119) | (2,115) |
Goodwill [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Balance at beginning of year | 3,263 | 3,189 |
Translation adjustment | (252) | 151 |
Balance at end of year | 3,011 | 3,340 |
Balance at end of year | 3,011 | 3,340 |
Goodwill [member] | Gross carrying amount [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Intangible assets and goodwill, cost | 3,011 | 3,340 |
Ifrs Concessions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Balance at beginning of year | 7,689 | 6,434 |
Additions | 23 | 167 |
Disposals | (4) | 7 |
Amortization | (125) | 123 |
Translation adjustment | (989) | 530 |
Balance at end of year | 6,594 | 7,001 |
Balance at end of year | 6,594 | 7,001 |
Disposals | 4 | (7) |
Amortization | 125 | (123) |
Ifrs Concessions [Member] | Gross carrying amount [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Intangible assets and goodwill, cost | 8,200 | 8,601 |
Ifrs Concessions [Member] | Accumulated depreciation, amortisation and impairment [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Accumulated amortization | (1,606) | (1,600) |
Computer software [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Balance at beginning of year | 104 | 87 |
Additions | 30 | 13 |
Amortization | (29) | 21 |
Translation adjustment | (12) | 6 |
Balance at end of year | 93 | 85 |
Balance at end of year | 93 | 85 |
Amortization | 29 | (21) |
Computer software [member] | Gross carrying amount [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Intangible assets and goodwill, cost | 606 | 600 |
Computer software [member] | Accumulated depreciation, amortisation and impairment [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Accumulated amortization | (513) | (515) |
Research And Development Project And Patents [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Balance at beginning of year | 575 | 528 |
Additions |  | 3 |
Disposals | (5) |  |
Translation adjustment | (73) | 44 |
Balance at end of year | 497 | 575 |
Balance at end of year | 497 | 575 |
Disposals | 5 |  |
Research And Development Project And Patents [Member] | Gross carrying amount [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Intangible assets and goodwill, cost | $ 497 | $ 575 |

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