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Discontinued Operations - Additional Information (Detail) $ / shares in Units, $ in Millions		3 Months Ended	6 Months Ended
	May 11, 2016 USD ($) Hotel Property Director $ / shares shares	Jun. 30, 2016 USD ($) Hotel	Jun. 30, 2016 USD ($) Hotel
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of owned properties transfer to new entity \| Hotel	5
Subsidiary cumulative percentage ownership after all transactions	55.00%
Non-cash pre-tax impairment charge		$ 214
Americas Segment [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of hotels \| Hotel		5	5
ILG [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Subsidiary cumulative percentage ownership after all transactions	45.00%
Number of Directors \| Director	13
Receivable from ILG		$ 13	$ 13
ILG [Member] \| Previous ILG Directors [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Directors \| Director	9
ILG [Member] \| Starwood Hotels and Resorts Worldwide Directors [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Directors \| Director	4
Vistana Vacation Ownership Business [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of owned properties transfer to new entity \| Property	5
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Fair value of stock and cash consideration	$ 1,200
Global license agreement period			80 years
Annual license fee			$ 30
Annual license fee adjustment period			5 years
Vistana Vacation Ownership Business [Member] \| ILG [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Common stock distribution received \| shares	0.4309
Common stock per share \| $ / shares	$ 14.385