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Investment in Associates and Joint Ventures - Summary of Financial Information of Material Associate Investment (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of associates [line items] |  |  |
Non-current assets | $ 2,796 | $ 3,259 | $ 2,912
Current assets | 2,243 | 916 | 1,373
Current liabilities | (1,867) | (1,365) | (1,407)
Non-current liabilities | (5,021) | (4,272) | (4,009)
Net assets | (1,849) | (1,465) | (1,131)
Revenue | 2,394 | 4,627 | 4,337
Profit/(loss) for the year | (260) | 386 | 350
Group's share of loss for the year, including the cost of funding owner returns | (1) | 7 | $ 7
Barclay associate [member] |  |  |
Disclosure of associates [line items] |  |  |
Non-current assets | 497 | 515 |
Current assets | 32 | 75 |
Current liabilities | (19) | (22) |
Non-current liabilities | (247) | (323) |
Net assets | 263 | 245 |
Revenue | 16 | 108 |
Profit/(loss) for the year | (52) | (17) |
Group's share of loss for the year, including the cost of funding owner returns | (13) | (10) |
Barclay associate [member] | Group share of reported net assets at 19.9% [member] |  |  |
Disclosure of associates [line items] |  |  |
Net assets | 52 | 49 |
Adjustments to reflect impairment, capitalised costs, and additional rights and obligations under the shareholder agreement | (9) | 4 |
Carrying amount | $ 43 | $ 53 |

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- Definition The amount of liabilities that: (a) the entity expects to settle in its normal operating cycle; (b) the entity holds primarily for the purpose of trading; (c) are due to be settled within twelve months after the reporting period; or (d) the entity does not have an unconditional right to defer settlement for at least twelve months after the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B12 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B12_b_iii&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 69 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_69&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B10 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B10_b&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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