Acquisition of business - Additional Information (Detail) - Kimpton Hotel & Restaurant Group LLC [member] $ in Millions	Jan. 16, 2015 USD ($)
Disclosure of detailed information about business combination [Line Items]
Date of acquisition	Jan. 16, 2015
Acquisition percentage	100.00%
Cash consideration	$ 438
Cash acquired	3
Fair value of net assets acquired - Total	441
Fair value of net assets acquired - Goodwill	167
Brands [member]
Disclosure of detailed information about business combination [Line Items]
Fair value of intangible assets acquired	193
Management contracts [member]
Disclosure of detailed information about business combination [Line Items]
Fair value of intangible assets acquired	$ 71

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]]

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