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v3.19.3.a.u2

Trade and other receivables - Summary of Ageing of Trade and Other Receivables (Detail) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Disclosure of trade and other receivables [line items] |  |  |  |
Gross | $ 570 | $ 513 |  |
Credit loss allowance | (18) | (11) | $ (77) | $ (69)
Net | 552 | 502 |  |
Not past due [member] |  |  |  |
Disclosure of trade and other receivables [line items] |  |  |  |
Gross | 400 | 356 |  |
Credit loss allowance | (3) | (1) |  |
Net | 397 | 355 |  |
Past due 1 to 30 days [member] |  |  |  |
Disclosure of trade and other receivables [line items] |  |  |  |
Gross | 74 | 71 |  |
Credit loss allowance | (3) | (1) |  |
Net | 71 | 70 |  |
Past due 31 to 90 days [member] |  |  |  |
Disclosure of trade and other receivables [line items] |  |  |  |
Gross | 56 | 52 |  |
Credit loss allowance | (5) | (2) |  |
Net | 51 | 50 |  |
Past due more than 90 days [member] |  |  |  |
Disclosure of trade and other receivables [line items] |  |  |  |
Gross | 40 | 34 |  |
Credit loss allowance | (7) | (7) |  |
Net | $ 33 | $ 27 |  |

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- Definition The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2019-03-27 + Details
Name: | ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Disclosure of trade and other receivables. + References No definition available. + Details
Name: | ihg_DisclosureOfTradeAndOtherReceivablesLineItems
Namespace Prefix: | ihg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Gross trade and other receivables. + References No definition available. + Details
Name: | ihg_GrossTradeAndOtherReceivables
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Trade and other receivables excluding prepayments. + References No definition available. + Details
Name: | ihg_TradeAndOtherReceivablesExcludingPrepayments
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_CurrentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_NotLaterThanOneMonthMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_LaterThanOneMonthAndNotLaterThanSixMonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_LaterThanThreeMonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |