Summary of Results of Operations for Three Hotels Sold in Twenty Sixteen and Eight Hotels Sold in Twenty Fifteen which are Included in Continuing Operations (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Disposal Group Not Discontinued Operation Disposal Disclosures [Abstract]
Revenues	$ 4	$ 35
Income before taxes	2	2
Gain on disposals	$ 58	$ 3

Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2443-110228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2941-110230

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Balance Type:	credit
Period Type:	duration