Segment Information - Revenues, Adjusted Ebitda, Ebitda from Unconsolidated Ventures, Capital Expenditures, Total Assets, and Investments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]
Total revenues	$ 1,458		$ 1,539
Other revenues from managed and franchised hotels	672		634
Other corporate unallocated	24		21
Corporate selling, general, administrative and other - unallocated	(42)		(35)
Gain (loss) on asset dispositions and impairments, net	(36)		(9)
Restructuring and other special (charges) credits			1
Adjustments to equity earnings	(10)	[1]	(8)	[1]
Interest expense	(24)		(27)
Depreciation and amortization	(68)		(65)
Discontinued operations	1		70
Income tax benefit (expense)	(8)		(64)
Net income attributable to Starwood	137		213
Capital expenditures, net	88		85
Assets, net	8,752				8,762
Other corporate assets [Member]
Segment Reporting Information [Line Items]
Assets, net	3,828				3,803
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	763		884
Total segment earnings	300		329
Total earnings from unconsolidated ventures	19		17
Total segment capital expenditures	57		75
Total segment assets	4,924	[2]			4,959	[2]
Total investments in unconsolidated ventures	245				251
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Total revenues	390	[3]	387	[3]
Total segment earnings	176		146
Total earnings from unconsolidated ventures	10		8
Total segment capital expenditures	43		59
Total segment assets	1,983				2,072
Total investments in unconsolidated ventures	70				68
Operating Segments [Member] | EMEA [Member]
Segment Reporting Information [Line Items]
Total revenues	119		115
Total segment earnings	24		25
Total earnings from unconsolidated ventures	(1)
Total segment capital expenditures	11		15
Total segment assets	924				951
Total investments in unconsolidated ventures	26				27
Operating Segments [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total revenues	82		76
Total segment earnings	56		51
Total earnings from unconsolidated ventures	10		9
Total segment capital expenditures	3		9
Total segment assets	702				674
Total investments in unconsolidated ventures	131				138
Operating Segments [Member] | Vacation ownership and residential [Member]
Segment Reporting Information [Line Items]
Total revenues	172		306
Total segment earnings	44		107
Total earnings from unconsolidated ventures
Total segment capital expenditures			(8)	[4]
Total segment assets	1,315				1,262
Total investments in unconsolidated ventures	18				18
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Other revenues from managed and franchised hotels	672		634
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	23		21
Other corporate revenues-unallocated [Member]
Segment Reporting Information [Line Items]
Capital expenditures, net	$ 31		$ 10

[1] Includes impairment losses, interest expense, depreciation and amortization expense related to equity earnings not allocated to segment earnings.

[2] Includes long-lived assets of $1.4 billion and $1.5 billion at March 31, 2014 and December 31, 2013, respectively, located in the United States of America. As well, includes long-lived assets of $379 million and $378 million at March 31, 2014 and December 31, 2013, respectively, located in Italy. No other country contributed more than 10% of our total long-lived assets.

[3] Includes revenues of $263 million and $270 million for the three months ended March 31, 2014 and 2013, respectively, from hotels located in the United States of America. No other country contributed more than 10% of our total revenues.

[4] Represents gross inventory capital expenditures less cost of sales of $(5) million and $(13) million for the three months ended March 31, 2014 and 2013, respectively. Additionally, includes development capital of $5 million for each of the three months ended March 31, 2014 and 2013.