Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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Mortgage Debt Issuances and Repayments (Detail) - USD ($) $ in Millions	1 Months Ended						12 Months Ended
	Sep. 30, 2016	Apr. 30, 2016	Mar. 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Oct. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Mortgage repayment							$ (137)	$ (35)	$ (384)
Novotel and ibis Christchurch
Debt Instrument [Line Items]
Rate	3.60%
Maturity date	Feb. 18, 2018
Mortgage repayment	$ (17)
Hyatt Regency Reston
Debt Instrument [Line Items]
Rate		3.50%
Maturity date		Jul. 01, 2016
Mortgage repayment		$ (100)
Ibis Wellington
Debt Instrument [Line Items]
Rate			3.70%
Maturity date			Feb. 18, 2018
Mortgage repayment			$ (11)
Novotel Wellington
Debt Instrument [Line Items]
Rate				5.70%
Maturity date				Feb. 18, 2018
Mortgage repayment				$ (9)
Novotel Queenstown Lakeside
Debt Instrument [Line Items]
Rate					6.70%
Maturity date					Feb. 18, 2016
Mortgage repayment					$ (20)
Novotel Auckland Ellerslie and ibis Auckland Ellerslie
Debt Instrument [Line Items]
Rate						6.40%
Maturity date						Feb. 18, 2016
Mortgage repayment						$ (15)