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Tax - Summary of Deferred Tax (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | $ 18 | $ (52)
Group income statement | 47 | 54
Group statement of comprehensive income | (11) | 15
Group statement of changes in equity | 2 | (1)
Exchange and other adjustments | (2) | 2
Ending balance | 54 | 18
Deferred gains on loan notes [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | (34) | (34)
Group income statement | 0 |
Group statement of comprehensive income | 0 |
Group statement of changes in equity | 0 |
Exchange and other adjustments | 0 |
Ending balance | (34) | (34)
Associates [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | (57) | (58)
Group income statement | 2 |
Group statement of comprehensive income | 0 |
Group statement of changes in equity | 0 |
Exchange and other adjustments | 0 | 1
Ending balance | (55) | (57)
Losses [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | 61 | 27
Group income statement | 21 | 28
Group statement of comprehensive income | 4 | 6
Group statement of changes in equity | 0 |
Exchange and other adjustments | (2) |
Ending balance | 84 | 61
Employee benefits [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | 34 | 33
Group income statement | 4 |
Group statement of comprehensive income | 0 | 1
Group statement of changes in equity | 2 | (1)
Exchange and other adjustments | (1) | 1
Ending balance | 39 | 34
Deferred compensation [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | 42 | 41
Group income statement | 6 | 1
Group statement of comprehensive income | 0 |
Group statement of changes in equity | 0 |
Exchange and other adjustments | 0 |
Ending balance | 48 | 42
Other short-term temporary differences [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | 20 | 33
Group income statement | (2) | (19)
Group statement of comprehensive income | (15) | 8
Group statement of changes in equity | 0 |
Exchange and other adjustments | 4 | (2)
Ending balance | 7 | 20
Property, plant, equipment and software [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | (95) | (119)
Group income statement | 15 | 23
Group statement of comprehensive income | 0 |
Group statement of changes in equity | 0 |
Exchange and other adjustments | (1) | 1
Ending balance | (81) | (95)
Other intangibles [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | 0 | (14)
Group income statement | 0 | 14
Group statement of comprehensive income | 0 |
Group statement of changes in equity | 0 |
Exchange and other adjustments | 0 |
Ending balance | 0 | 0
Application fees and contract costs [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Group income statement | (2) |
Application Fees [Member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | 42 | 43
Group income statement |  | (2)
Group statement of comprehensive income | 0 |
Group statement of changes in equity | 0 |
Exchange and other adjustments | 0 | 1
Ending balance | 40 | 42
Credit Losses [Member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | 22 | 12
Group income statement | (1) | 10
Group statement of comprehensive income | 0 |
Group statement of changes in equity | 0 |
Exchange and other adjustments | (1) |
Ending balance | 20 | 22
Contract Costs [Member] |  |
Disclosure of income tax reconciliation [line items] |  |
Beginning balance | (17) | (16)
Group income statement | 4 | (1)
Group statement of comprehensive income | 0 |
Group statement of changes in equity | 0 |
Exchange and other adjustments | (1) |
Ending balance | $ (14) | $ (17)

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- Definition The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_ii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in deferred tax liability (asset) resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Deferred tax liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81&doctype=Standard -URIDate 2021-03-24 + Details
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