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Other Financial Assets and Liabilities - Summary of Hedging Activities (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) TBTU us-au MMBTU MMBbls AUD ($) SwissFrance | Dec. 31, 2021 USD ($) MMBTU TBTU SwissFrance MMBbls us-au AUD ($)
Oil Swaps [member] | Cash flow hedges [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Carrying amount | $ (114) | $ (1)
Notional amount | MMBbls | 18 | 30
Maturity date | 2023 |
Hedge ratio | 1:1 | 1:1
Weighted average hedged rate | MMBbls | 79 | 74
Oil Swaps [member] | Cash flow hedges [member] | Top of range [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Maturity date |  | 2022
Oil Swaps [member] | Cash flow hedges [member] | Bottom of range [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Maturity date |  | 2023
HH Corpus Christi commodity Swaps [member] | Cash flow hedges [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Carrying amount | $ 26 | $ 31
Notional amount | TBTU | 58 | 65
Hedge ratio | 1:1 | 1:1
Weighted average hedged rate | MMBTU | 4 | 3
HH Corpus Christi commodity Swaps [member] | Cash flow hedges [member] | Top of range [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Maturity date | 2023 | 2022
HH Corpus Christi commodity Swaps [member] | Cash flow hedges [member] | Bottom of range [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Maturity date | 2024 | 2023
TTF Corpus Christi Commodity Swaps [member] | Cash flow hedges [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Carrying amount | $ (469) | $ (465)
Notional amount | TBTU | 50 | 49
Hedge ratio | 1:1 | 1:1
Weighted average hedged rate | MMBTU | 16 | 9
TTF Corpus Christi Commodity Swaps [member] | Cash flow hedges [member] | Top of range [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Maturity date | 2023 | 2022
TTF Corpus Christi Commodity Swaps [member] | Cash flow hedges [member] | Bottom of range [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Maturity date | 2024 | 2023
TTF Commodity Swaps [member] | Cash flow hedges [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Carrying amount | $ 0 | $ 4
Notional amount | TBTU | 0 | 3
Maturity date |  | 2022
Hedge ratio | 0 | 1:1
Weighted average hedged rate | MMBTU | 0 | 26
Interest rate swap contract [member] | Cash flow hedges [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Carrying amount | $ 55 | $ (17)
Notional amount | 600 | 600
Maturity date | 2027 | 2027
Hedge ratio | 1:1 | 1:1
Weighted average hedged rate | 0.017 | 0.017
Cross Currency Interest Rate Swap [member] | Cash flow and fair value hedges [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Carrying amount | $ 5 | $ 9
Notional amount | SwissFrance | 175 | 175
Maturity date | 2023 | 2023
Hedge ratio | 1:1 | 1:1
Weighted average hedged rate | Three month USD LIBOR+2.8% | Three month US$ LIBOR+2.8%
FX Forwards [member] | Cash flow hedges [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Carrying amount | $ (17) | $ 10
Notional amount | 1,037 | 934
Hedge ratio | 1:1 | 1:1
Weighted average hedged rate | us-au | 0.68 | 0.71
FX Forwards [member] | Cash flow hedges [member] | Top of range [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Maturity date | 2023 | 2022
FX Forwards [member] | Cash flow hedges [member] | Bottom of range [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Maturity date | 2025 | 2025

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- Definition The average price of a hedging instrument. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 23B -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_23B_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The nominal amount of a hedging instrument. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 23B -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_23B_a&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24A -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24A_d&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Description of weighted average rate of hedging instrument. + References No definition available. + Details
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- Definition Hedge ratio. + References No definition available. + Details
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