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Goodwill and other intangible assets - Additional Information (Detail) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 16, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |  |
Contingency factor applied to reduce cash flow projections |  | 10.00% |  |
Goodwill and other intangible assets |  | $ 1,467 | $ 1,292 | $ 1,226
Software assets not in use and therefore not being amortised [member] | Software [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |  |
Goodwill and other intangible assets |  | 234 |  |
Brands [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |  |
Goodwill and other intangible assets |  | $ 193 | $ 193 |
Management contracts [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |  |
Weighted average remaining amortisation period for management contracts |  | 30 years | 31 years |
Kimpton Hotel & Restaurant Group LLC [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |  |
Fair value of net assets acquired - Goodwill | $ 167 |  |  |
Kimpton Hotel & Restaurant Group LLC [member] | Brands [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |  |
Fair value of intangible assets acquired | 193 |  |  |
Kimpton Hotel & Restaurant Group LLC [member] | Management contracts [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |  |
Fair value of intangible assets acquired | $ 71 |  |  |

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- Definition The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B67 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B67_d_ii&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount recognised as of the acquisition date for identifiable intangible assets acquired in a business combination. [Refer: Intangible assets other than goodwill; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_i&doctype=Appendix&seq=2 -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph IE72 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_IE72&doctype=Illustrative%20Examples -URIDate 2017-03-09 + Details
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- Definition The amount of intangible assets and goodwill held by the entity. [Refer: Goodwill; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Contingency factor percentage. + References No definition available. + Details
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