Starwood Hotel & Resorts Worldwide 10-Q 4 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 29, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Trading Symbol	HOT
Entity Registrant Name	STARWOOD HOTEL & RESORTS WORLDWIDE, INC
Entity Central Index Key	316,206
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		169,537,647

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 1,180	$ 1,048
Restricted cash	68	54
Accounts receivable, net of allowance for doubtful accounts of $83 and $78	671	690
Inventories	355	319
Securitized vacation ownership notes receivable, net of allowance for doubtful accounts of $2 and $2	31	32
Prepaid expenses and other	175	152
Total current assets	2,480	2,295
Investments	197	183
Plant, property and equipment, net	2,068	2,144
Goodwill and intangible assets, net	1,948	1,908
Deferred income taxes	757	747
Other assets	867	839
Securitized vacation ownership notes receivable, net	127	141
Total assets	8,444	8,257
Current liabilities:
Short-term borrowings and current maturities of long-term debt	34	33
Accounts payable	115	98
Current maturities of long-term securitized vacation ownership debt	45	48
Accrued expenses	1,399	1,354
Accrued salaries, wages and benefits	325	400
Accrued taxes and other	312	303
Total current liabilities	2,230	2,236
Long-term debt	2,318	2,144
Long-term securitized vacation ownership debt	111	123
Deferred income taxes	31	34
Other liabilities	2,407	2,421
Total liabilities	$ 7,097	$ 6,958
Commitments and contingencies
Stockholders’ equity:
Common stock; $0.01 par value; authorized 1,000,000,000 shares; outstanding 169,537,501 and 168,754,605 shares at March 31, 2016 and December 31, 2015, respectively	$ 2	$ 2
Additional paid-in capital	115	115
Accumulated other comprehensive loss	(645)	(668)
Retained earnings	1,872	1,847
Total Starwood stockholders’ equity	1,344	1,296
Noncontrolling interest	3	3
Total equity	1,347	1,299
Total liabilities and equity	$ 8,444	$ 8,257

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 83	$ 78
Allowance for doubtful notes receivable	$ 2	$ 2
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	1,000,000,000	1,000,000,000
Common stock, outstanding	169,537,501	168,754,605

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues
Owned, leased and consolidated joint venture hotels	$ 265	$ 316
Vacation ownership and residential sales and services	185	187
Management fees, franchise fees and other income	256	240
Other revenues from managed and franchised properties	698	672
Total revenues	1,404	1,415
Costs and Expenses
Owned, leased and consolidated joint venture hotels	217	262
Vacation ownership and residential sales and services	142	137
Selling, general, administrative and other	86	91
Restructuring and other special charges (credits), net	39	31
Depreciation	62	62
Amortization	8	7
Other expenses from managed and franchised properties	698	672
Total cost and expenses	1,252	1,262
Operating income	152	153
Equity earnings and gains from unconsolidated ventures, net	12	15
Interest expense, net of interest income of $1 and $1	(23)	(31)
Gain (loss) on asset dispositions and impairments, net	2	14
Income from continuing operations before taxes and noncontrolling interests	143	151
Income tax expense	(53)	(52)
Income from continuing operations	90	99
Discontinued operations:
Net income attributable to Starwood	$ 90	$ 99
Earnings Per Share — Basic
Continuing operations	$ 0.54	$ 0.59
Net income	0.54	0.59
Earnings Per Share — Diluted
Continuing operations	0.53	0.58
Net income	$ 0.53	$ 0.58
Weighted average number of shares	167	170
Weighted average number of shares assuming dilution	168	171
Dividends declared per share	$ 0.375	$ 0.375

Consolidated Statements of Inc5

Consolidated Statements of Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Interest income	$ 1	$ 1
Tax (benefit) expense on gain (loss) of dispositions from discontinued operations	$ 0	$ 0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 90	$ 99
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	25	(112)
Defined benefit pension and postretirement plans activity	1	1
Hedging activities	(3)	1
Total other comprehensive income (loss), net of taxes	23	(110)
Total comprehensive income (loss)	113	(11)
Comprehensive income (loss) attributable to Starwood	$ 113	$ (11)

Consolidated Condensed Statemen

Consolidated Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Activities
Net income	$ 90	$ 99
Adjustments to net income:
Depreciation and amortization	70	69
Amortization of deferred gains	(21)	(22)
(Gain) loss on asset dispositions and impairments, net	(2)	(14)
Stock-based compensation expense	13	14
Excess stock-based compensation tax benefit		(7)
Distributions in (deficit) excess of equity earnings	(4)	(8)
Deferred income tax expense	9	41
Other non-cash adjustments to net income	21	(16)
Decrease (increase) in restricted cash	(14)	23
Other changes in working capital	(77)	(114)
Securitized VOI notes receivable activity, net	15	19
Unsecuritized VOI notes receivable activity, net	(28)	(18)
Accrued income taxes and other	(24)	(11)
Cash from operating activities	48	55
Investing Activities
Purchases of plant, property and equipment	(35)	(51)
Proceeds from asset sales, net of transaction costs	83
Acquisitions, net of acquired cash	(50)	(4)
Issuance of notes receivable, net	(11)	(5)
Distributions from investments, net		31
Other, net	31	4
Cash from (used for) investing activities	18	(25)
Financing Activities
Commercial paper, net	183	(172)
Long-term debt issued		9
Long-term debt repaid	(20)	(4)
Long-term securitized debt repaid	(15)	(20)
Dividends paid	(68)	(64)
Proceeds from employee stock option exercises	3	11
Excess stock-based compensation tax benefit		7
Share repurchases		(123)
Other, net	(22)	(25)
Cash from (used for) financing activities	61	(381)
Exchange rate effect on cash and cash equivalents	5	(11)
Increase (decrease) in cash and cash equivalents	132	(362)
Cash and cash equivalents — beginning of period	1,048	935
Cash and cash equivalents — end of period	1,180	573
Cash paid during the period for:
Interest	15	51
Income taxes, net of refunds	$ 36	$ 21

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	N ote 1. Basis of Presentation The accompanying consolidated financial statements represent the consolidated financial position and consolidated results of operations of Starwood Hotels & Resorts Worldwide, Inc. and our subsidiaries. We are one of the world’s largest hotel and leisure companies. Our principal business is hotels and leisure, which is comprised of a worldwide hospitality network of 1,308 full-service hotels, vacation ownership resorts and residential developments primarily serving two markets: luxury and upper-upscale. The principal operations of Starwood Vacation Ownership, Inc. (SVO) include the development and operation of vacation ownership resorts and marketing, selling and financing of vacation ownership interests (VOIs) in the resorts. The consolidated financial statements include our assets, liabilities, revenues and expenses and those of our controlled subsidiaries and partnerships. In consolidating, all material intercompany transactions are eliminated. We have evaluated all subsequent events through the date the consolidated financial statements were filed with the Securities and Exchange Commission. Following the guidance for noncontrolling interests in Accounting Standards Codification (ASC) Topic 810, Consolidation

Recently Issued Accounting Stan

Recently Issued Accounting Standards	3 Months Ended
	Mar. 31, 2016
Accounting Changes And Error Corrections [Abstract]
Recently Issued Accounting Standards	Note 2. Recently Issued Accounting Standards Future Accounting Standards In March 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-09, “Compensation - Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting.” The amendments in this topic are intended to simplify several aspects of the accounting for share-based payment award transactions and are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods, with early adoption permitted. We are still assessing the timing of adoption and the potential impact that ASU No. 2016-09 will have on our financial statements and disclosures. In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842)”, which supersedes existing guidance on accounting for leases and generally requires all leases to be recognized on the balance sheet and is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. The amendments in this ASU are to be applied using a modified retrospective approach. We are still assessing the timing of adoption and the potential impact that ASU No. 2016-02 will have on our financial statements and disclosures. In August 2014, the FASB issued ASU No. 2014-15, “Presentation of Financial Statements- Going Concern (Subtopic 205-40) Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern.” This update provides guidance on management’s responsibility to evaluate whether there is substantial doubt about the ability to continue as a going concern and to provide related interim and annual footnote disclosures. The amendments in this ASU are effective for reporting periods ending after December 15, 2016, and we plan to adopt this ASU for the annual period ending on December 31, 2016. We do not believe the adoption of this update will have a material impact on our financial statements. In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606).” This topic provides for five principles which should be followed to determine the appropriate amount and timing of revenue recognition for the transfer of goods and services to customers. The principles in this ASU should be applied to all contracts with customers regardless of industry, with two transition methods of adoption allowed. In July 2015, the FASB approved a one-year deferral of this standard, with a revised effective date for reporting periods beginning after December 15, 2017. Early adoption is permitted for annual periods beginning after December 16, 2016. We plan to adopt this ASU on January 1, 2018. We are still evaluating the financial statement impacts of the guidance in this ASU and determining which transition method we will utilize. Adopted Accounting Standards In April 2015, the FASB issued ASU No. 2015-05, “Intangibles- Goodwill and Other- Internal – Use Software (Subtopic 350-40) Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement.” The amendments in this topic are intended to provide guidance about whether a cloud computing arrangement includes a software license. This update is effective for annual and interim periods beginning after December 15, 2015 with early adoption permitted. We adopted this ASU prospectively on January 1, 2016. The adoption of this update did not have a material impact on our financial statements. In April 2015, the FASB issued ASU No. 2015-03, “Interest- Imputation of Interest (Subtopic 835-30) Simplifying the Presentation of Debt Issuance Costs.” The amendments in this topic are intended to simplify the presentation of debt issuance costs and are effective for annual and interim periods beginning after December 15, 2015, with early adoption permitted. We adopted this ASU on January 1, 2016 and retrospectively applied the standard to the December 31, 2015 balance sheet by reclassifying approximately $11 million from other assets to long-term debt and long-term securitized vacation ownership debt. In February 2015, the FASB issued ASU No. 2015-02, “Consolidation (Topic 810) Amendments to the Consolidation Analysis.” The amendments in this update are intended to improve and simplify targeted areas of the consolidation guidance and are effective for annual and interim periods beginning after December 15, 2015, with early adoption permitted. We adopted this ASU on January 1, 2016. The adoption of this update did not have a material impact on our financial statements.

Earnings per Share

Earnings per Share	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Earnings per Share	Note 3. Earnings per Share The following is a reconciliation of basic earnings per share to diluted earnings per share for income from continuing operations attributable to our common stockholders (in millions, except per share data): Three Months Ended March 31, 2016 2015 Income from continuing operations $ 90 $ 99 Weighted average common shares for basic earnings per share 167 170 Effect of dilutive stock options and restricted stock awards 1 1 Weighted average common shares for diluted earnings per share 168 171 Basic earnings per share $ 0.54 $ 0.59 Diluted earnings per share $ 0.53 $ 0.58 Approximately 1.1 million shares and 0.8 million shares for the three months ended March 31, 2016 and 2015, respectively, were excluded from the computation of diluted shares, as their impact would have been anti-dilutive.

Asset Dispositions and Impairme

Asset Dispositions and Impairments	3 Months Ended
	Mar. 31, 2016
Discontinued Operations And Disposal Groups [Abstract]
Asset Dispositions and Impairments	Note 4. Asset Dispositions and Impairments During the three months ended March 31, 2016, we sold one hotel for cash proceeds net of closing costs of approximately $79 million subject to a long-term management agreement. The sale resulted in a pre-tax gain of approximately $5 million, which we deferred and are recognizing into management fees, franchise fees and other income over the initial term of the management agreement. Additionally, during the three months ended March 31, 2016, we recorded a net gain of $2 million, primarily related to the reduction of an obligation associated with a previous disposition. Subsequent to March 31, 2016, management received approval to commit to a plan to sell two foreign wholly-owned hotels, entered into a definitive purchase and sale agreement and received a non-refundable deposit. These hotels are expected to be sold in the second quarter of 2016 subject to long-term management agreements. We believe that this will result in the recognition of a gain on the sale which will be more than offset by the realization of a significant cumulative translation adjustment loss due to substantial liquidation. During the three months ended March 31, 2015, we recorded a $17 million gain related to the sale of a minority partnership interest in a hotel.

Transfers of Financial Assets

Transfers of Financial Assets	3 Months Ended
	Mar. 31, 2016
Transfers And Servicing [Abstract]
Transfers of Financial Assets	Note 5. Transfers of Financial Assets We have variable interests in the entities associated with our three outstanding securitization transactions. As these securitizations consist of similar, homogenous loans, they have been aggregated for disclosure purposes. We applied the variable interest model and determined we are the primary beneficiary of these variable interest entities (VIEs). In making this determination, we evaluated the activities that significantly impact the economics of the VIEs, including the management of the securitized notes receivable and any related non-performing loans. We are the servicer of the securitized mortgage receivables. We also have the option, subject to certain limitations, to repurchase or replace VOI notes receivable that are in default at their outstanding principal amounts. Such activity totaled $2 million and $3 million and during the three months ended March 31, 2016 and 2015, respectively. We have been able to resell the VOIs underlying the VOI notes repurchased or replaced under these provisions without incurring significant losses. We hold the risk of potential loss (or gain), as the last to be paid out by proceeds of the VIEs under the terms of the agreements. As such, we hold both the power to direct the activities of the VIEs and obligation to absorb the losses (or benefits) from the VIEs. The securitization agreements are without recourse to us, except for breaches of representations and warranties. We have the right to fund defaults at our option, subject to certain limitations, and we intend to do so until the debt is extinguished to maintain the credit rating of the underlying notes. Upon transfer of VOI notes receivable to the VIEs, the receivables and certain cash flows derived from them become restricted for use in meeting obligations to the VIE creditors. The VIEs utilize trusts which have ownership of cash balances that also have restrictions, the amounts of which are reported in restricted cash. Our interests in trust assets are subordinate to the interests of third-party investors and, as such, may not be realized by us if needed to absorb deficiencies in cash flows that are allocated to the investors in the trusts’ debt (see Note 8). We are contractually obligated to receive the excess cash flows (spread between the collections on the notes and third party obligations defined in the securitization agreements) from the VIEs. Such activity totaled $6 million and $8 million during the three months ended March 31, 2016 and 2015, respectively, and is classified in cash and cash equivalents.

Vacation Ownership Notes Receiv

Vacation Ownership Notes Receivable	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Vacation Ownership Notes Receivable	Note 6. Vacation Ownership Notes Receivable Notes receivable (net of reserves) related to our vacation ownership loans consisted of the following (in millions): March 31, December 31, 2016 2015 Vacation ownership loans – securitized $ 158 $ 173 Vacation ownership loans – unsecuritized 463 443 621 616 Less: current portion Vacation ownership loans – securitized (31 ) (32 ) Vacation ownership loans – unsecuritized (44 ) (41 ) $ 546 $ 543 We include the current and long-term maturities of unsecuritized VOI notes receivable in accounts receivable and other assets, respectively, in our consolidated balance sheets. We record interest income associated with VOI notes in our vacation ownership and residential sales and services line item in our consolidated statements of income. Interest income related to our VOI notes receivable was as follows (in millions): Three Months Ended March 31, 2016 2015 Vacation ownership loans – securitized $ 6 $ 9 Vacation ownership loans – unsecuritized 15 12 $ 21 $ 21 The following table presents future maturities of gross VOI notes receivable (in millions) and interest rates: Securitized Unsecuritized Total 2016 $ 25 $ 40 $ 65 2017 32 49 81 2018 29 48 77 2019 26 50 76 2020 23 52 75 Thereafter 36 305 341 Balance at March 31, 2016 $ 171 $ 544 $ 715 Weighted average interest rates at March 31, 2016 13.22 % 12.94 % 13.00 % Range of interest rates 6.0 to 17.0% 5.0 to 17.0% 5.0 to 17.0% For the vacation ownership and residential segment, we record an estimate of expected uncollectibility on our VOI notes receivable as a reduction of revenue at the time we recognize profit on a timeshare sale. We hold large amounts of homogeneous VOI notes receivable and, therefore, assess uncollectibility based on pools of receivables. In estimating loss reserves, we use a technique referred to as static pool analysis, which tracks uncollectible notes for each year’s sales over the life of the respective notes and projects an estimated default rate that is used in the determination of our loan loss reserve requirements. As of March 31, 2016 and December 31, 2015, the average estimated default rate for our pools of receivables was approximately 9.1% and 9.1%, respectively. The activity and balances for our loan loss reserve were as follows (in millions): Securitized Unsecuritized Total Balance at December 31, 2015 $ 15 $ 77 $ 92 Provisions for loan losses — 8 8 Write-offs — (6 ) (6 ) Other (2 ) 2 — Balance at March 31, 2016 $ 13 $ 81 $ 94 Balance at December 31, 2014 $ 28 $ 68 $ 96 Provisions for loan losses (1 ) 4 3 Write-offs — (6 ) (6 ) Other (3 ) 3 — Balance at March 31, 2015 $ 24 $ 69 $ 93 We use the origination of the notes by brand (Sheraton, Westin, and Other) and the Fair Isaac Corporation (FICO) scores of the buyers as the primary credit quality indicators to calculate the loan loss reserve for the vacation ownership notes, as we believe there is a relationship between the default behavior of borrowers and the brand associated with the vacation ownership property they have acquired, supplemented by the FICO scores of the buyers. In addition to quantitatively calculating the loan loss reserve based on our static pool analysis, we supplement the process by evaluating certain qualitative data, including the aging of the respective receivables and current default trends by brand and origination year. Balances of our VOI notes receivable by brand and by FICO score were as follows (in millions): As of March 31, 2016 700+ 600-699 <600 No Score Total Sheraton $ 165 $ 145 $ 13 $ 62 $ 385 Westin 191 88 5 33 317 Other 7 2 — 4 13 $ 363 $ 235 $ 18 $ 99 $ 715 As of December 31, 2015 700+ 600-699 <600 No Score Total Sheraton $ 165 $ 145 $ 14 $ 60 $ 384 Westin 185 89 5 32 311 Other 7 2 — 4 13 $ 357 $ 236 $ 19 $ 96 $ 708 Given the significance of our pools of VOI notes receivable, a change in the projected default rate can have a significant impact to our loan loss reserve requirements, with a 0.1% change estimated to have an impact of approximately $5 million. We consider a VOI note receivable delinquent when it is more than 30 days outstanding. Delinquent notes receivable amounted to $45 million and $46 million as of March 31, 2016 and December 31, 2015, respectively. All delinquent loans are placed on nonaccrual status, and we do not resume interest accrual until payment is made. We consider loans to be in default upon reaching 120 days outstanding, at which point, we generally commence the repossession process. Uncollectible VOI notes receivable are charged off when title to the unit is returned to us. We generally do not modify vacation ownership notes that become delinquent or upon default. Past due balances of VOI notes receivable were as follows (in millions): Total Receivables Current Delinquent 30-59 Days 60-89 Days >90 Days Total As of March 31, 2016 $ 715 $ 670 $ 9 $ 7 $ 29 $ 45 As of December 31, 2015 $ 708 $ 662 $ 12 $ 7 $ 27 $ 46

Debt

Debt	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Debt	Note 7. Debt Long-term debt and short-term borrowings consisted of the following, excluding securitized vacation ownership debt (in millions): March 31, December 31, 2016 2015 Senior Credit Facility: Revolving Credit Facility, maturing 2020 $ — $ — Senior Notes, interest at 6.75%, maturing 2018 373 372 Senior Notes, interest at 7.15%, maturing 2019 211 209 Senior Notes, interest at 3.125%, maturing 2023 346 346 Senior Notes, interest at 3.75%, maturing 2025 344 344 Senior Notes, interest at 4.50%, maturing 2034 289 289 Capital lease obligations 159 169 Commercial paper, weighted average interest at 0.781% at March 31, 2016 591 408 Mortgages and other, interest rates ranging from non-interest bearing to 3.65%, various maturities 39 40 2,352 2,177 Less current maturities (34 ) (33 ) Long-term debt $ 2,318 $ 2,144

Securitized Vacation Ownership

Securitized Vacation Ownership Debt	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Securitized Vacation Ownership Debt	Note 8. Securitized Vacation Ownership Debt As discussed in Note 5, our VIEs associated with the securitization of our VOI notes receivable are consolidated in our financial statements. Long-term and short-term securitized vacation ownership debt consisted of the following (in millions): March 31, December 31, 2016 2015 2010 securitization, interest rates ranging from 3.65% to 4.75%, maturing 2021 43 48 2011 securitization, interest rates ranging from 3.67% to 4.82%, maturing 2025 56 61 2012 securitization, interest rates ranging from 2.00% to 2.76%, maturing 2023 57 62 156 171 Less current maturities (45 ) (48 ) Long-term securitized debt $ 111 $ 123

Other Liabilities

Other Liabilities	3 Months Ended
	Mar. 31, 2016
Other Liabilities Disclosure [Abstract]
Other Liabilities	Note 9. Other Liabilities Other liabilities consisted of the following (in millions): March 31, December 31, 2016 2015 Deferred gains on asset sales $ 1,328 $ 1,329 SPG point liability (a) 818 830 Deferred revenue 43 46 Benefit plan liabilities 44 45 Deferred rent 26 27 Insurance reserves 48 47 Other 100 97 $ 2,407 $ 2,421 (a) Includes the actuarially determined liability and certain deferred revenues related to the Starwood Preferred Guest program. Deferred Gains. We defer gains realized in connection with the sale of a property that we continue to manage through a long-term management agreement and recognize the gains over the initial term of the related agreement (see Note 4). As of March 31, 2016 and December 31, 2015, we had total deferred gains of approximately $1,412 million and $1,412 million, respectively, included in accrued expenses and other liabilities in our consolidated balance sheets. Amortization of deferred gains is included in management fees, franchise fees and other income in our consolidated statements of income and totaled approximately $21 million and $22 million in the three months ended March 31, 2016 and 2015, respectively. Frequent Guest Program. Starwood Preferred Guest (SPG) is our frequent guest incentive marketing program. SPG members earn points based on spending at our owned, managed and franchised hotels, as incentives to first-time buyers of VOIs and residences, and through participation in affiliated partners’ programs such as co-branded credit cards and airline travel. Points can be redeemed at substantially all of our owned, leased, managed and franchised hotels as well as through other redemption opportunities with third parties, such as conversion to airline miles. We charge our owned, leased, managed and franchised hotels the cost of operating the SPG program, including the estimated cost of our future redemption obligation, based on a percentage of our SPG members’ qualified expenditures. Our management and franchise agreements require that we are reimbursed for the costs of operating the SPG program, including marketing, promotions and communications and performing member services for the SPG members. As points are earned, we increase the SPG point liability for the amount of cash we receive from our managed and franchised hotels related to the future redemption obligation. For our owned hotels, we record an expense for the amount of our future redemption obligation with the offset to the SPG point liability. When points are redeemed by the SPG members, the hotels recognize revenue and the SPG point liability is reduced. Through the services of third-party actuarial analysts, we determine the value of the future redemption obligation based on statistical formulas which project the timing of future point redemptions based on historical experience, including an estimate of the “breakage” for points that will never be redeemed, and an estimate of the points that will eventually be redeemed as well as the cost of reimbursing hotels and other third parties for other point redemption opportunities. We consolidate the assets and liabilities of the SPG program including the liability associated with the future redemption obligation which is included in other long-term liabilities and accrued expenses in the consolidated balance sheets. The total actuarially determined liability as of March 31, 2016 and December 31, 2015, was $1,195 million and $1,219 million, respectively, of which $481 million and $491 million, respectively, was included in accrued expenses.

Restructuring and Other Special

Restructuring and Other Special Charges (Credits), Net	3 Months Ended
	Mar. 31, 2016
Restructuring And Related Activities [Abstract]
Restructuring and Other Special Charges (Credits), Net	Note 10. Restructuring and Other Special Charges (Credits), Net Restructuring and other special charges (credits), net were $39 million and $31 million for the three months ended March 31, 2016 and 2015, respectively. These net charges (credits) are not recorded in our reportable segment earnings. During the three months ended March 31, 2016, we recorded $8 million in net restructuring charges and $31 million of other special charges. The restructuring charges are primarily related to costs associated with our cost savings initiatives announced in 2015. Other special charges primarily consist of $19 million of costs primarily associated with professional fees related to the planned merger with Marriott International, Inc. (Marriott) (see Note 20), $7 million of costs related to the planned separation, distribution, and subsequent merger of our vacation ownership business (see Note 19) and a $2 million charge for technology related costs and expenses that we no longer deem recoverable. During the three months ended March 31, 2015, we recorded $8 million in restructuring costs associated with severance as a result of certain cost savings initiatives at our divisions and $23 million of other special charges. Other special charges primarily consist of a $7 million severance charge associated with the resignation of our prior President and Chief Executive Officer, the establishment of $6 million of reserves related to potential liabilities assumed in connection with the Le Méridien acquisition (see Note 18), and $6 million of costs primarily associated with professional fees for the planned separation, distribution and subsequent merger of our vacation ownership business (see Note 19). As of March 31, 2016, we had remaining restructuring accruals of $9 million, of which $3 million is recorded in accrued expenses and the remainder is recorded in other liabilities. As of December 31, 2015, we had remaining restructuring accruals of $10 million, of which $5 million is recorded in accrued expenses and the remainder is recorded in other liabilities. The following table summarizes activity in the restructuring related accruals during the three months ended March 31, 2016 (in millions): December 31, Expenses/ Payments Non-Cash March 31, 2015 Reversals Other 2016 Severance costs related to cost savings initiatives $ 2 $ (1 ) $ — $ — $ 1 Vacation ownership exit cost from ceased projects 4 — — — 4 Other 4 9 (9 ) — 4 Total $ 10 $ 8 $ (9 ) $ — $ 9

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2016
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 11. Derivative Financial Instruments We enter into forward contracts to manage foreign exchange risk based on market conditions and to hedge certain forecasted transactions. These forward contracts have been designated and qualify as cash flow hedges, and their change in fair value is recorded as a component of other comprehensive income and reclassified into earnings in the same period or periods in which the forecasted transaction occurs. To qualify as a hedge, we need to formally document, designate and assess the effectiveness of the transactions that receive hedge accounting. The notional dollar amount of the outstanding Euro forward contracts at March 31, 2016 was $45 million, with an average exchange rate of 1.13, and with terms of less than one year. We review the effectiveness of our hedging instruments on a quarterly basis and record any ineffectiveness into earnings. We discontinue hedge accounting for any hedge that is no longer evaluated to be highly effective. From time to time, we may choose to de-designate portions of hedges when changes in estimates of forecasted transactions occur. For the three months ended March 31, 2016, each of these hedges was highly effective in offsetting fluctuations in foreign currencies We also enter into forward contracts to manage foreign exchange risk on intercompany loans that are not deemed long-term investment nature. These forward contracts are not designated as hedges, and their change in fair value is recorded in our consolidated statements of income during each reporting period. The notional dollar amount of these outstanding forward contracts at March 31, 2016 was $1,087 million, with terms of less than one year. These forward contracts provide an economic hedge, as they largely offset foreign currency exposures on intercompany loans. We enter into interest rate swap agreements to manage interest expense. The swaps qualify as fair value swaps and modify our interest rate exposure by effectively converting debt with a fixed rate to a floating rate. Our objective is to manage the impact of interest rates on the results of operations, cash flows and the market value of our debt. At March 31, 2016, we had five interest rate swap agreements with an aggregate notional amount of $250 million under which we pay floating rates and receive fixed rates of interest (Fair Value Swaps). The Fair Value Swaps hedge the change in fair value of certain fixed rate debt related to fluctuations in interest rates and mature in 2018 and 2019. These interest rate swaps have been designated and qualify as fair value hedges and have met the requirements to assume zero ineffectiveness. The counterparties to our derivative financial instruments are major financial institutions. We evaluate the credit ratings of the financial institutions and believe that credit risk is at an acceptable level. The following tables summarize the fair value of our derivative instruments (in millions): March 31, December 31, 2016 2015 Balance Sheet Fair Balance Sheet Fair Location Value Location Value Derivatives designated as hedging instruments Asset Derivatives Interest rate swaps Other assets $ 7 Other assets $ 4 Forward contracts Prepaid expenses and other — Prepaid expenses and other 1 Total assets $ 7 $ 5 Liability Derivatives Forward contracts Accrued expenses $ 1 Accrued expenses $ — March 31, December 31, 2016 2015 Balance Sheet Fair Balance Sheet Fair Location Value Location Value Derivatives not designated as hedging instruments Asset Derivatives Forward contracts Prepaid expenses and other $ 14 Prepaid expenses and other $ 9 Liability Derivatives Forward contracts Accrued expenses $ 6 Accrued expenses $ 1 The following table presents the effect of our derivatives on our consolidated statements of income (in millions): Location of Amount of Gain (Loss) Gain (Loss) Recognized in Recognized in Derivatives Not Designated as Hedging Instruments Income on Derivative Income on Derivative Three Months Ended March 31, 2016 2015 Foreign forward exchange contracts Interest expense, net $ (3 ) $ (28 ) The interest rate swaps and forward contracts are financial assets and liabilities measured at fair value on a recurring basis. The interest rate swaps are valued using an income approach. Expected future cash flows are converted to a present value amount based on market expectations of the yield curve on floating interest rates, which are readily available on public markets, and as such, are classified as Level 2. The forward contracts are over-the-counter contracts that do not trade on a public exchange. The fair values of these contracts are based on inputs such as foreign currency spot rates and forward points that are readily available on public markets, and as such, are classified as Level 2. We consider both our credit risk, as well as our counterparties’ credit risk, in determining fair value, and we did not make an adjustment as it was deemed insignificant based on the short duration of the contracts and our rate of short-term debt.

Pension and Postretirement Bene

Pension and Postretirement Benefit Plans	3 Months Ended
	Mar. 31, 2016
Compensation And Retirement Disclosure [Abstract]
Pension and Postretirement Benefit Plans	Note 12. Pension and Postretirement Benefit Plans We sponsor, or have previously sponsored, numerous funded and unfunded domestic and foreign pension and postretirement benefit plans. The net periodic benefit cost for our domestic pension benefits, foreign pension benefits and postretirement benefits amounted to less than $1 million for the three months ended March 31, 2016 and 2015. Additionally, the net actuarial losses reclassified from accumulated other comprehensive income for our domestic, pension benefits, foreign pension benefits and postretirement benefits amounted to less than $1 million for the three months ended March 31, 2016 and 2015. During the three months ended March 31, 2016, we contributed approximately $2 million to our pension and postretirement benefit plans. For the remainder of 2016, we expect to contribute approximately $9 million to our pension and postretirement benefit plans. A significant portion of the contributions relates to the foreign pension plans, for which we are reimbursed by our managed hotels.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Note 13. Income Taxes The total amount of unrecognized tax benefits as of March 31, 2016 was $312 million, of which $105 million would affect our effective tax rate if recognized. It is reasonably possible that approximately $9 million of our unrecognized tax benefits as of March 31, 2016, will reverse within the next twelve months. We recognize interest and penalties related to unrecognized tax benefits through income tax expense. As of March 31, 2016, we had $21 million accrued for the payment of interest and $2 million accrued for the payment of penalties. During the three months ended March 31, 2016, we resolved a previous dispute related to a foreign tax audit, which resulted in a tax benefit of $2 million due to the reversal of reserves in excess of the settlement amount. We are subject to taxation in the U.S. federal jurisdiction, as well as various state and foreign jurisdictions. As of March 31, 2016, we are no longer subject to examination by U.S. federal taxing authorities for years prior to 2007 or to examination by any U.S. state taxing authority prior to 2006. All subsequent periods remain eligible for examination. In the significant foreign jurisdictions in which we operate, we are no longer subject to examination by the relevant taxing authorities for any years prior to 2009. We are under regular audit by the Internal Revenue Service (IRS). We have received certain Notices of Proposed Adjustment from the IRS for years 2007 through 2009; however, we disagree with the IRS on certain of these adjustments and have filed a formal appeals protest to dispute them. We intend to vigorously contest these adjustments, including pursuing litigation, if necessary. If upheld or settled, these unagreed adjustments could result in a significant cash tax and interest payment. More than half of this amount would not affect the effective tax rate due to the timing nature of certain issues.

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Stockholders' Equity	Note 14. Stockholders’ Equity The following tables represent changes in stockholders’ equity that are attributable to our stockholders and non-controlling interests for the three months ended March 31, 2016 (in millions): Equity Attributable to Starwood Stockholders Accumulated Equity Additional Other Attributable to Common Paid-in Comprehensive Retained Noncontrolling Total Shares Capital Loss Earnings Interests Balance at December 31, 2015 $ 1,299 $ 2 $ 115 $ (668 ) $ 1,847 $ 3 Net income 90 — — — 90 — Equity compensation activity and other (2 ) — — — (2 ) — Dividends (63 ) — — — (63 ) — Share repurchases — — — — — — Other comprehensive income 23 — — 23 — Balance at March 31, 2016 $ 1,347 $ 2 $ 115 $ (645 ) $ 1,872 $ 3 Share Issuances and Repurchases. During the three months ended March 31, 2016, we issued less than 0.1 million of our common shares as a result of stock option exercises. During the three months ended March 31, 2016, we did not repurchase any common shares. As of March 31, 2016, $458 million remained available under the share repurchase authorization approved by our Board of Directors. Under the terms of our merger agreement with Marriott, we are precluded from repurchasing our stock without their consent. Dividends. In the first quarter of 2016, we declared and paid approximately $63 million of dividends, or $0.375 per share, to stockholders of record as of March 14, 2016. Accumulated Other Comprehensive Loss. The following table presents the changes in accumulated other comprehensive loss by component for the three months ended March 31, 2016 (in millions): For the Three Months Ended March 31, 2016 (a) Defined Benefit Foreign Net Pension and Currency Cash Flow Investment Postretirement Translation Hedges (b) Hedges Benefit Plans (c) Adjustments (d) Total Balance at December 31, 2015 $ 1 $ — $ (79 ) $ (590 ) $ (668 ) Other comprehensive income (loss) before reclassifications (2 ) — — 25 23 Amounts reclassified from accumulated other comprehensive income (loss) — (2 ) 1 — (1 ) Total before tax (2 ) (2 ) 1 25 22 Tax benefit (expense) — 1 — — 1 Net current year other comprehensive income (loss) (2 ) (1 ) 1 25 23 Balance at March 31, 2016 $ (1 ) $ (1 ) $ (78 ) $ (565 ) $ (645 ) (a) Amounts in parentheses indicate debits. (b) Pretax gains and losses on forward contract cash flow hedges are reclassified to management fees, franchise fees and other income. (c) Pretax amortization of defined benefit pension and postretirement benefit plans is reclassified to selling, general, administrative and other. (d) Losses of $21 million related to intra-entity foreign currency transactions that are of a long-term investment nature are included in other comprehensive loss in the three months ended March 31, 2016.

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	Note 15. Stock-Based Compensation In accordance with our 2013 Long-Term Incentive Compensation Plan (the 2013 LTIP), during the three months ended March 31, 2016, we granted restricted stock, restricted stock units and performance shares to executive officers, members of the Board of Directors and certain employees. In February 2016, a target number of contingent performance shares, which contain a market condition, were awarded to certain executives. Vesting of the performance shares is dependent upon a market condition and three years of continuous service beginning at date of grant, subject to a prorated adjustment for employees who are terminated under certain circumstances or who retire. The market condition is based on our total stockholder return relative to the total stockholder return of a specified group of peer companies at the end of a three-calendar-year performance period beginning January 1, 2016 and ending December 31, 2018. The number of performance shares earned is determined based on our percentile ranking among these companies. The performance shares are entitled to any dividends made during the performance period in the same proportion as the number of performance shares that vest. Dividends will be paid at the end of the service period. We classified the performance shares as a share-based equity award, and as such, compensation expense related to these shares is based on the grant-date fair value, which will be recognized ratably over the requisite service period. We determined the fair value of the performance shares using a Monte Carlo simulation valuation model. The Monte Carlo simulation estimates the fair value of our performance awards primarily based on the terms associated with the grant and public information that is readily available. The underlying principles in the Monte Carlo simulation are that publicly traded stocks are fairly priced and the future returns of a stock may be estimated primarily by the stock’s assumed volatility. During the three months ended March 31, 2016, we granted approximately 164,000 performance shares with a grant date fair value of $84.64 per share. In addition, we granted approximately 1,007,000 shares of restricted stock and restricted stock units that had a weighted average grant date fair value of $68.96 per share or unit. We recorded stock-based employee compensation expense, including the impact of reimbursements from third parties, of $13 million and $14 million in the three months ended March 31, 2016 and 2015, respectively. As of March 31, 2016, there was approximately $98 million of unrecognized compensation cost, net of estimated forfeitures, including the impact of reimbursements from third parties, which is expected to be recognized on a straight-line basis over a weighted-average period of 1.7 years.

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value	Note 16. Fair Value We believe the carrying values of our financial instruments related to current assets and current liabilities approximate fair value. The following table presents the carrying amounts and estimated fair values of our long-term financial instruments (in millions): March 31, 2016 December 31, 2015 Hierarchy Carrying Fair Carrying Fair Level Amount Value Amount Value Assets: Restricted cash 1 $ 4 $ 4 $ 4 $ 4 VOI notes receivable 3 419 518 402 495 Securitized vacation ownership notes receivable 3 127 158 141 174 Other notes receivable 3 73 73 63 63 Total financial assets $ 623 $ 753 $ 610 $ 736 Liabilities: Long-term debt 1 $ 2,318 $ 2,410 $ 2,144 $ 2,178 Long-term securitized debt 3 111 113 123 126 Total financial liabilities $ 2,429 $ 2,523 $ 2,267 $ 2,304 Off-Balance sheet: Letters of credit 2 $ — $ 78 $ — $ 80 Surety bonds 2 — 30 — 32 Total off-balance sheet $ — $ 108 $ — $ 112 The carrying value of our restricted cash approximates its fair value. We estimate the fair value of our vacation ownership notes receivable using assumptions related to current securitization market transactions. The fair value of other notes receivable is estimated based on the terms of the instrument and current market conditions. These financial instrument assets are recorded in the other assets line item in our consolidated balance sheet. We estimate the fair value of our publicly traded debt based on the bid prices in the public debt markets. The carrying amount of our floating rate debt is a reasonable basis of fair value due to the variable nature of the interest rates. Our non-public, securitized debt and fixed rate debt fair value is determined based upon discounted cash flows for the debt at rates deemed reasonable for the type of debt, prevailing market conditions and the length to maturity for the debt. The fair values of our letters of credit and surety bonds are estimated to be the same as the contract values based on the nature of the fee arrangements with the issuing financial institutions.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Segment Information	Note 17. Segment Information Our hotel business is segregated into three separate hotel segments: (i) the Americas, (ii) Europe, Africa and the Middle East (EAME), and (iii) Asia Pacific. The vacation ownership and residential business is a separate segment. Our reportable segments each have a division president who is responsible for the management of the division. Each division president reports directly to our Chief Executive Officer who is also the Chief Operating Decision Maker (CODM). Financial information for each reportable segment is reviewed by the CODM to assess performance and make decisions regarding the allocation of resources. Each hotel segment generates its earnings through a network of owned, leased, consolidated and unconsolidated joint venture hotels and resorts operated primarily under our proprietary brand names including St. Regis®, The Luxury Collection®, W®, Westin®, Le Méridien®, Sheraton®, Four Points® by Sheraton, Aloft®, Element®, and Tribute Portfolio TM The management of our vacation ownership and residential sales business is conducted by the vacation ownership and residential segment. The vacation ownership and residential segment generates its earnings through the acquisition, development and operation of vacation ownership resorts, marketing and selling of VOIs and residential units, and providing financing to customers who purchase such interests. See Note 19, Planned Reverse Morris Trust Transaction, for a discussion of our plans for the separation of our vacation ownership business, distribution of the shares of Vistana Signature Experiences, Inc. (Vistana) common stock to our stockholders and unitholders of SLC Operating Limited Partnership on a pro-rata basis and Vistana’s subsequent merger with a wholly-owned subsidiary of Interval Leisure Group, Inc. (ILG). The CODM primarily evaluates the operating performance of a segment based on segment earnings. We define segment earnings as net income attributable to our common stockholders before interest expense, taxes, depreciation and amortization, as well as our share of interest, depreciation and amortization associated with our unconsolidated joint ventures, excluding certain recurring and nonrecurring items, such as restructuring and other special charges (credits), loss on early extinguishment of debt, and gains (losses) on asset dispositions and impairments. Residential revenue generated at hotel properties is recorded in the corresponding geographic hotel segment. General, administrative and other expenses directly related to the segments are included in the calculation of segment earnings, whereas corporate general, administrative, and other expenses are not included in the segment earnings calculation. In addition to revenues recorded within our four segments, we also have other revenues from managed and franchised properties, which represent the reimbursement of costs incurred on behalf of managed and franchised property owners. These revenues, together with the corresponding expenses, are not recorded within our segments. Other corporate unallocated revenues and earnings primarily relate to other license fee income and are also reported outside of segment revenues. The following tables present revenues and segment earnings for our reportable segments (in millions): Three Months Ended March 31, 2016 2015 Revenues: Americas $ 342 $ 369 EAME 86 98 Asia Pacific 68 65 Vacation ownership and residential 184 186 Total segment revenues 680 718 Other revenues from managed and franchised hotels 698 672 Other corporate revenues — unallocated 26 25 $ 1,404 $ 1,415 Three Months Ended March 31, 2016 2015 Segment earnings: Americas $ 167 $ 165 EAME 29 29 Asia Pacific 48 46 Vacation ownership and residential 42 49 Total segment earnings 286 289 Other corporate income — unallocated 28 26 Corporate selling, general, administrative and other expenses — unallocated (33 ) (41 ) Gain (loss) on asset dispositions and impairments, net 2 14 Restructuring and other special (charges) credits (39 ) (31 ) Adjustments to equity earnings (a) (7 ) (5 ) Interest expense (24 ) (32 ) Depreciation and amortization (70 ) (69 ) Income tax expense (53 ) (52 ) Net income attributable to Starwood $ 90 $ 99 (a) Includes impairment losses, certain gains on hotel sales, interest expense, depreciation and amortization expense related to equity earnings not allocated to segment earnings.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 18. Commitments and Contingencies Variable Interest Entities. We have determined that we have a variable interest in 23 hotels, generally in the form of investments, loans, guarantees, or equity. We determine if we are the primary beneficiary of these hotels by primarily considering the qualitative factors. Qualitative factors include evaluating if we have the power to control the VIE and have the obligation to absorb the losses and rights to receive the benefits of the VIE, that could potentially be significant to the VIE. We have determined that we are not the primary beneficiary of these VIEs and therefore, these entities are not consolidated in our financial statements. See Note 5 for the VIEs in which we are deemed the primary beneficiary and have consolidated the entities. The 23 VIEs associated with our variable interests represent entities that own hotels for which we have entered into management or franchise agreements with the hotel owners. We are paid a fee primarily based on financial metrics of the hotel. The hotels are financed by the owners, generally in the form of working capital, equity and debt. At March 31, 2016, we have approximately $108 million of investments and a loan balance of $1 million associated with these VIEs. The maximum loss under these agreements equals the carrying value because we are not obligated to fund future cash contributions. In addition, we have not contributed amounts to the VIEs in excess of our contractual obligations. At December 31, 2015, we evaluated the 22 hotels in which we had a variable interest. As of that date, we had approximately $106 million of investments and a loan balance of $1 million associated with these VIEs. Guaranteed Loans and Commitments. In limited cases, we have made loans to owners of or partners in hotel or resort ventures for which we have a management or franchise agreement. Loans outstanding under this program totaled $48 million at March 31, 2016. We evaluate these loans for impairment, and at March 31, 2016, we believe these loans are collectible. Unfunded loan commitments aggregating to $49 million were outstanding at March 31, 2016, of which $34 million is expected to be funded in the next twelve months. These loans typically are secured by pledges of project ownership interests and/or mortgages on the projects. We also have $226 million of equity and other potential contributions associated with managed, franchised, or joint venture properties, $74 million of which is expected to be funded in the next twelve months. Surety bonds issued on our behalf as of March 31, 2016 totaled $30 million. Surety bonds may be required by state or local governments relating to our vacation ownership operations and by our insurers to secure large deductible insurance programs. To secure management contracts, we may provide performance guarantees to third-party owners. Most of these performance guarantees allow us to terminate the contract rather than fund shortfalls if certain performance levels are not met. In limited cases, we are obligated to fund shortfalls in performance levels through the issuance of loans. Many of the performance tests are multi-year tests, tied to the results of a competitive set of hotels and have exclusions for force majeure and acts of war or terrorism. During the three months ended March 31, 2016, we amended an agreement associated with two hotels in Greece and as a result of that amendment, we no longer expect to fund a previously reserved performance guarantee of $4 million. We do not anticipate any significant funding under performance guarantees, nor do we anticipate losing a significant number of management or franchise contracts in 2016. In connection with the purchase of the Le Méridien brand in November 2005, we were indemnified for certain of Le Méridien’s historical liabilities by the entity that bought Le Méridien’s owned and leased hotel portfolio. The indemnity is limited to the financial resources of that entity, which have significantly decreased in recent years. We have received various claims on these historical liabilities. If we have to fund any of these claims, we do not expect to be able to recover such amounts through the indemnification. Litigation. We are involved in various legal matters that have arisen in the normal course of business, some of which include claims for substantial sums. Accruals have been recorded when the outcome is probable and can be reasonably estimated. As of March 31, 2016, certain contingencies have been evaluated as reasonably possible, but not probable, with a range of exposure of $0 to $28 million. While the ultimate results of claims and litigation cannot be determined, we do not believe that the resolution of these legal matters will have a material adverse effect on our consolidated results of operations, financial position or cash flow. However, depending on the amount and the timing, an unfavorable resolution of some or all of these matters could materially affect our future results of operations or cash flows in a particular period.

Planned Spin-off

Planned Spin-off	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Planned Spin-off	Note 19. Planned Reverse Morris Trust Transaction On February 10, 2015, we announced plans to spin-off our vacation ownership business to stockholders as a separate publically traded company, Vistana. On October 27, 2015, we entered into definitive agreements with ILG, a wholly-owned subsidiary of ILG (ILG Merger Sub) and Vistana through a Reverse Morris Trust transaction, pursuant to which, subject to the terms and conditions thereof, (a) we and certain of our subsidiaries will engage in a series of transactions in which certain assets and liabilities, including five hotels to be converted to vacation ownership properties, will be (i) sold directly to one or more subsidiaries of ILG or (ii) otherwise conveyed pursuant to an internal restructuring to Vistana and entities that will become Vistana subsidiaries, in order to separate our vacation ownership business from our other businesses, (b) immediately after such separation, via spin-off we will distribute the shares of Vistana common stock to our stockholders on a pro rata basis and (c) immediately after such distribution, Vistana will merge with ILG Merger Sub. The holders of SLC Operating Limited Partnership units, which are entitled to the distribution, will also receive shares of Vistana common stock. On April 20, 2016, the stockholders of ILG approved the proposal necessary for the acquisition of Vistana. When the foregoing transactions are completed, Vistana will be a wholly-owned subsidiary of ILG, our stockholders will own approximately 55% of the outstanding shares of ILG on a fully-diluted basis and the existing shareholders of ILG will own approximately 45% of ILG on a fully-diluted basis. Upon the closing of the transactions, ILG’s board of directors will consist of 13 directors, comprising nine current ILG directors and four of our director appointees. On April 29, 2016, we and ILG announced a brief delay in the planned closing of ILG’s acquisition of Vistana, while both companies work to avoid unnecessary tax withholding under the Foreign Investment in Real Property Tax Act of 1980 (FIRPTA), as discussed in ILG’s and our Current Reports on Form 8-K, which were filed with the U.S. Securities and Exchange Commission on April 19, 2016. The companies are working to finalize the procedures to identify which shareholders are properly subject to this withholding. The acquisition was previously expected to close on April 30, 2016, and is now expected to close in May, subject to satisfaction or waiver of customary closing conditions. In connection with the transactions, we expect to record a significant non-cash pre-tax impairment charge in the second quarter of 2016 resulting from the difference between the carrying value of our investment in the vacation ownership business and the fair value of the consideration received at the transaction date, which is primarily based on the value of ILG common stock that will be received by our stockholders and unitholders. As this transaction represented a material strategic shift in our business, the revenues and expenses of Vistana, including the impairment charge, and the costs associated with the transactions will be reclassified to discontinued operations. Both the distribution of the shares of Vistana common stock and merger of Vistana with ILG Merger Sub are expected to generally qualify as transactions that are tax-free for U.S. federal income tax purposes to our U.S. stockholders. The sale of certain assets and liabilities related to the Vistana vacation ownership business and the distribution of Vistana common shares could be taxable to us, including as a result of events subsequent to the Reverse Morris Trust transaction. These events could include, but are not limited to, consummation of the proposed Marriott merger. An estimate of the range of the potential tax liability, if any, that may result if the Reverse Morris Trust transaction is taxable to us is not practicable at this time. This potential tax liability, if any, could also be mitigated by payments from ILG under the Tax Matters Agreement, entered into by and among Starwood, Vistana and ILG in connection with the transactions, in certain circumstances.

Planned Marriott Merger

Planned Marriott Merger	3 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Planned Marriott Merger	Note 20. Planned Marriott Merger On November 15, 2015, we entered into a definitive merger agreement with Marriott and we amended that agreement on March 20, 2016. The transaction was approved by Marriott and Starwood stockholders on April 8, 2016. At closing, Starwood stockholders will receive 0.80 shares of Marriott common stock and $21.00 in cash for each share of Starwood common stock. On a pro forma basis, Starwood stockholders will own approximately 34% of the combined company’s common stock after the completion of the merger. In the second quarter of 2016, Starwood stockholders will separately receive consideration from the transactions involving the separation of the Starwood vacation ownership business, the distribution of the shares of Vistana common stock to Starwood stockholders and unitholders of SLC Operating Limited Partnership on a pro rata basis and subsequent merger of Vistana with ILG Merger Sub (see Note 19). Following the closing of the merger, Marriott’s Board of Directors will increase from 11 to 14 members with the expected addition of three members of the Starwood Board of Directors. The transaction is subject to certain regulatory approvals and the satisfaction of other customary closing conditions. Assuming the consumption of those conditions, the parties expect the transaction to close in mid-2016.

Recently Issued Accounting St28

Recently Issued Accounting Standards (Policies)	3 Months Ended
	Mar. 31, 2016
Accounting Changes And Error Corrections [Abstract]
Recently Issued Accounting Standards	Future Accounting Standards In March 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-09, “Compensation - Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting.” The amendments in this topic are intended to simplify several aspects of the accounting for share-based payment award transactions and are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods, with early adoption permitted. We are still assessing the timing of adoption and the potential impact that ASU No. 2016-09 will have on our financial statements and disclosures. In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842)”, which supersedes existing guidance on accounting for leases and generally requires all leases to be recognized on the balance sheet and is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. The amendments in this ASU are to be applied using a modified retrospective approach. We are still assessing the timing of adoption and the potential impact that ASU No. 2016-02 will have on our financial statements and disclosures. In August 2014, the FASB issued ASU No. 2014-15, “Presentation of Financial Statements- Going Concern (Subtopic 205-40) Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern.” This update provides guidance on management’s responsibility to evaluate whether there is substantial doubt about the ability to continue as a going concern and to provide related interim and annual footnote disclosures. The amendments in this ASU are effective for reporting periods ending after December 15, 2016, and we plan to adopt this ASU for the annual period ending on December 31, 2016. We do not believe the adoption of this update will have a material impact on our financial statements. In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606).” This topic provides for five principles which should be followed to determine the appropriate amount and timing of revenue recognition for the transfer of goods and services to customers. The principles in this ASU should be applied to all contracts with customers regardless of industry, with two transition methods of adoption allowed. In July 2015, the FASB approved a one-year deferral of this standard, with a revised effective date for reporting periods beginning after December 15, 2017. Early adoption is permitted for annual periods beginning after December 16, 2016. We plan to adopt this ASU on January 1, 2018. We are still evaluating the financial statement impacts of the guidance in this ASU and determining which transition method we will utilize. Adopted Accounting Standards In April 2015, the FASB issued ASU No. 2015-05, “Intangibles- Goodwill and Other- Internal – Use Software (Subtopic 350-40) Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement.” The amendments in this topic are intended to provide guidance about whether a cloud computing arrangement includes a software license. This update is effective for annual and interim periods beginning after December 15, 2015 with early adoption permitted. We adopted this ASU prospectively on January 1, 2016. The adoption of this update did not have a material impact on our financial statements. In April 2015, the FASB issued ASU No. 2015-03, “Interest- Imputation of Interest (Subtopic 835-30) Simplifying the Presentation of Debt Issuance Costs.” The amendments in this topic are intended to simplify the presentation of debt issuance costs and are effective for annual and interim periods beginning after December 15, 2015, with early adoption permitted. We adopted this ASU on January 1, 2016 and retrospectively applied the standard to the December 31, 2015 balance sheet by reclassifying approximately $11 million from other assets to long-term debt and long-term securitized vacation ownership debt. In February 2015, the FASB issued ASU No. 2015-02, “Consolidation (Topic 810) Amendments to the Consolidation Analysis.” The amendments in this update are intended to improve and simplify targeted areas of the consolidation guidance and are effective for annual and interim periods beginning after December 15, 2015, with early adoption permitted. We adopted this ASU on January 1, 2016. The adoption of this update did not have a material impact on our financial statements.

Earnings per Share (Tables)

Earnings per Share (Tables)	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Reconciliation of Basic Earnings per Share to Diluted Earnings per Share for Income from Continuing Operations	The following is a reconciliation of basic earnings per share to diluted earnings per share for income from continuing operations attributable to our common stockholders (in millions, except per share data): Three Months Ended March 31, 2016 2015 Income from continuing operations $ 90 $ 99 Weighted average common shares for basic earnings per share 167 170 Effect of dilutive stock options and restricted stock awards 1 1 Weighted average common shares for diluted earnings per share 168 171 Basic earnings per share $ 0.54 $ 0.59 Diluted earnings per share $ 0.53 $ 0.58

Vacation Ownership Notes Rece30

Vacation Ownership Notes Receivable (Tables)	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Notes Receivable (Net of Reserves) Related to Vacation Ownership Loans	Notes receivable (net of reserves) related to our vacation ownership loans consisted of the following (in millions): March 31, December 31, 2016 2015 Vacation ownership loans – securitized $ 158 $ 173 Vacation ownership loans – unsecuritized 463 443 621 616 Less: current portion Vacation ownership loans – securitized (31 ) (32 ) Vacation ownership loans – unsecuritized (44 ) (41 ) $ 546 $ 543
Interest Income Related to VOI Notes Receivable	Interest income related to our VOI notes receivable was as follows (in millions): Three Months Ended March 31, 2016 2015 Vacation ownership loans – securitized $ 6 $ 9 Vacation ownership loans – unsecuritized 15 12 $ 21 $ 21
Future Maturities of Gross VOI Notes Receivable and Interest Rates	The following table presents future maturities of gross VOI notes receivable (in millions) and interest rates: Securitized Unsecuritized Total 2016 $ 25 $ 40 $ 65 2017 32 49 81 2018 29 48 77 2019 26 50 76 2020 23 52 75 Thereafter 36 305 341 Balance at March 31, 2016 $ 171 $ 544 $ 715 Weighted average interest rates at March 31, 2016 13.22 % 12.94 % 13.00 % Range of interest rates 6.0 to 17.0% 5.0 to 17.0% 5.0 to 17.0%
Loan Loss Reserve	The activity and balances for our loan loss reserve were as follows (in millions): Securitized Unsecuritized Total Balance at December 31, 2015 $ 15 $ 77 $ 92 Provisions for loan losses — 8 8 Write-offs — (6 ) (6 ) Other (2 ) 2 — Balance at March 31, 2016 $ 13 $ 81 $ 94 Balance at December 31, 2014 $ 28 $ 68 $ 96 Provisions for loan losses (1 ) 4 3 Write-offs — (6 ) (6 ) Other (3 ) 3 — Balance at March 31, 2015 $ 24 $ 69 $ 93
Balances of VOI Notes Receivable by Brand and by FICO Score	Balances of our VOI notes receivable by brand and by FICO score were as follows (in millions): As of March 31, 2016 700+ 600-699 <600 No Score Total Sheraton $ 165 $ 145 $ 13 $ 62 $ 385 Westin 191 88 5 33 317 Other 7 2 — 4 13 $ 363 $ 235 $ 18 $ 99 $ 715 As of December 31, 2015 700+ 600-699 <600 No Score Total Sheraton $ 165 $ 145 $ 14 $ 60 $ 384 Westin 185 89 5 32 311 Other 7 2 — 4 13 $ 357 $ 236 $ 19 $ 96 $ 708
Past Due Balances of VOI Notes Receivable	Past due balances of VOI notes receivable were as follows (in millions): Total Receivables Current Delinquent 30-59 Days 60-89 Days >90 Days Total As of March 31, 2016 $ 715 $ 670 $ 9 $ 7 $ 29 $ 45 As of December 31, 2015 $ 708 $ 662 $ 12 $ 7 $ 27 $ 46

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Long-Term Debt and Short-Term Borrowings Excluding Securitized Vacation Ownership Debt	Long-term debt and short-term borrowings consisted of the following, excluding securitized vacation ownership debt (in millions): March 31, December 31, 2016 2015 Senior Credit Facility: Revolving Credit Facility, maturing 2020 $ — $ — Senior Notes, interest at 6.75%, maturing 2018 373 372 Senior Notes, interest at 7.15%, maturing 2019 211 209 Senior Notes, interest at 3.125%, maturing 2023 346 346 Senior Notes, interest at 3.75%, maturing 2025 344 344 Senior Notes, interest at 4.50%, maturing 2034 289 289 Capital lease obligations 159 169 Commercial paper, weighted average interest at 0.781% at March 31, 2016 591 408 Mortgages and other, interest rates ranging from non-interest bearing to 3.65%, various maturities 39 40 2,352 2,177 Less current maturities (34 ) (33 ) Long-term debt $ 2,318 $ 2,144

Securitized Vacation Ownershi32

Securitized Vacation Ownership Debt (Tables)	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Long-Term And Short-Term Securitized Vacation Ownership Debt	As discussed in Note 5, our VIEs associated with the securitization of our VOI notes receivable are consolidated in our financial statements. Long-term and short-term securitized vacation ownership debt consisted of the following (in millions): March 31, December 31, 2016 2015 2010 securitization, interest rates ranging from 3.65% to 4.75%, maturing 2021 43 48 2011 securitization, interest rates ranging from 3.67% to 4.82%, maturing 2025 56 61 2012 securitization, interest rates ranging from 2.00% to 2.76%, maturing 2023 57 62 156 171 Less current maturities (45 ) (48 ) Long-term securitized debt $ 111 $ 123

Other Liabilities (Tables)

Other Liabilities (Tables)	3 Months Ended
	Mar. 31, 2016
Other Liabilities Disclosure [Abstract]
Summary of Other Liabilities	Other liabilities consisted of the following (in millions): March 31, December 31, 2016 2015 Deferred gains on asset sales $ 1,328 $ 1,329 SPG point liability (a) 818 830 Deferred revenue 43 46 Benefit plan liabilities 44 45 Deferred rent 26 27 Insurance reserves 48 47 Other 100 97 $ 2,407 $ 2,421 (a) Includes the actuarially determined liability and certain deferred revenues related to the Starwood Preferred Guest program.

Restructuring and Other Speci34

Restructuring and Other Special Charges (Credits), Net (Tables)	3 Months Ended
	Mar. 31, 2016
Restructuring And Related Activities [Abstract]
Summary of Restructuring Related Accruals	The following table summarizes activity in the restructuring related accruals during the three months ended March 31, 2016 (in millions): December 31, Expenses/ Payments Non-Cash March 31, 2015 Reversals Other 2016 Severance costs related to cost savings initiatives $ 2 $ (1 ) $ — $ — $ 1 Vacation ownership exit cost from ceased projects 4 — — — 4 Other 4 9 (9 ) — 4 Total $ 10 $ 8 $ (9 ) $ — $ 9

Derivative Financial Instrume35

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Fair Values of Derivative Instruments	The following tables summarize the fair value of our derivative instruments (in millions): March 31, December 31, 2016 2015 Balance Sheet Fair Balance Sheet Fair Location Value Location Value Derivatives designated as hedging instruments Asset Derivatives Interest rate swaps Other assets $ 7 Other assets $ 4 Forward contracts Prepaid expenses and other — Prepaid expenses and other 1 Total assets $ 7 $ 5 Liability Derivatives Forward contracts Accrued expenses $ 1 Accrued expenses $ — March 31, December 31, 2016 2015 Balance Sheet Fair Balance Sheet Fair Location Value Location Value Derivatives not designated as hedging instruments Asset Derivatives Forward contracts Prepaid expenses and other $ 14 Prepaid expenses and other $ 9 Liability Derivatives Forward contracts Accrued expenses $ 6 Accrued expenses $ 1
Derivative Instruments Gain (Loss) Recognized in Income	The following table presents the effect of our derivatives on our consolidated statements of income (in millions): Location of Amount of Gain (Loss) Gain (Loss) Recognized in Recognized in Derivatives Not Designated as Hedging Instruments Income on Derivative Income on Derivative Three Months Ended March 31, 2016 2015 Foreign forward exchange contracts Interest expense, net $ (3 ) $ (28 )

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Equity Attributable to Starwood's Stockholders	The following tables represent changes in stockholders’ equity that are attributable to our stockholders and non-controlling interests for the three months ended March 31, 2016 (in millions): Equity Attributable to Starwood Stockholders Accumulated Equity Additional Other Attributable to Common Paid-in Comprehensive Retained Noncontrolling Total Shares Capital Loss Earnings Interests Balance at December 31, 2015 $ 1,299 $ 2 $ 115 $ (668 ) $ 1,847 $ 3 Net income 90 — — — 90 — Equity compensation activity and other (2 ) — — — (2 ) — Dividends (63 ) — — — (63 ) — Share repurchases — — — — — — Other comprehensive income 23 — — 23 — Balance at March 31, 2016 $ 1,347 $ 2 $ 115 $ (645 ) $ 1,872 $ 3
Summary of Changes in Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss. The following table presents the changes in accumulated other comprehensive loss by component for the three months ended March 31, 2016 (in millions): For the Three Months Ended March 31, 2016 (a) Defined Benefit Foreign Net Pension and Currency Cash Flow Investment Postretirement Translation Hedges (b) Hedges Benefit Plans (c) Adjustments (d) Total Balance at December 31, 2015 $ 1 $ — $ (79 ) $ (590 ) $ (668 ) Other comprehensive income (loss) before reclassifications (2 ) — — 25 23 Amounts reclassified from accumulated other comprehensive income (loss) — (2 ) 1 — (1 ) Total before tax (2 ) (2 ) 1 25 22 Tax benefit (expense) — 1 — — 1 Net current year other comprehensive income (loss) (2 ) (1 ) 1 25 23 Balance at March 31, 2016 $ (1 ) $ (1 ) $ (78 ) $ (565 ) $ (645 ) (a) Amounts in parentheses indicate debits. (b) Pretax gains and losses on forward contract cash flow hedges are reclassified to management fees, franchise fees and other income. (c) Pretax amortization of defined benefit pension and postretirement benefit plans is reclassified to selling, general, administrative and other. (d) Losses of $21 million related to intra-entity foreign currency transactions that are of a long-term investment nature are included in other comprehensive loss in the three months ended March 31, 2016.

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Carrying Amounts and Estimated Fair Values of Long-Term Financial Instruments	We believe the carrying values of our financial instruments related to current assets and current liabilities approximate fair value. The following table presents the carrying amounts and estimated fair values of our long-term financial instruments (in millions): March 31, 2016 December 31, 2015 Hierarchy Carrying Fair Carrying Fair Level Amount Value Amount Value Assets: Restricted cash 1 $ 4 $ 4 $ 4 $ 4 VOI notes receivable 3 419 518 402 495 Securitized vacation ownership notes receivable 3 127 158 141 174 Other notes receivable 3 73 73 63 63 Total financial assets $ 623 $ 753 $ 610 $ 736 Liabilities: Long-term debt 1 $ 2,318 $ 2,410 $ 2,144 $ 2,178 Long-term securitized debt 3 111 113 123 126 Total financial liabilities $ 2,429 $ 2,523 $ 2,267 $ 2,304 Off-Balance sheet: Letters of credit 2 $ — $ 78 $ — $ 80 Surety bonds 2 — 30 — 32 Total off-balance sheet $ — $ 108 $ — $ 112

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Revenues and Segment Earnings	The following tables present revenues and segment earnings for our reportable segments (in millions): Three Months Ended March 31, 2016 2015 Revenues: Americas $ 342 $ 369 EAME 86 98 Asia Pacific 68 65 Vacation ownership and residential 184 186 Total segment revenues 680 718 Other revenues from managed and franchised hotels 698 672 Other corporate revenues — unallocated 26 25 $ 1,404 $ 1,415 Three Months Ended March 31, 2016 2015 Segment earnings: Americas $ 167 $ 165 EAME 29 29 Asia Pacific 48 46 Vacation ownership and residential 42 49 Total segment earnings 286 289 Other corporate income — unallocated 28 26 Corporate selling, general, administrative and other expenses — unallocated (33 ) (41 ) Gain (loss) on asset dispositions and impairments, net 2 14 Restructuring and other special (charges) credits (39 ) (31 ) Adjustments to equity earnings (a) (7 ) (5 ) Interest expense (24 ) (32 ) Depreciation and amortization (70 ) (69 ) Income tax expense (53 ) (52 ) Net income attributable to Starwood $ 90 $ 99 (a) Includes impairment losses, certain gains on hotel sales, interest expense, depreciation and amortization expense related to equity earnings not allocated to segment earnings.

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016HotelMarkets
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Hotels | Hotel	1,308
Number of markets | Markets	2

Recently Issued Accounting St40

Recently Issued Accounting Standards - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
Accounting Standards Update Number Two Thousand Fifteen March [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification of other assets to long-term debt	$ 11

Earnings per Share - Reconcilia

Earnings per Share - Reconciliation of Basic Earnings per Share to Diluted Earnings per Share for Income from Continuing Operations (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Income from continuing operations	$ 90	$ 99
Weighted average common shares for basic earnings per share	167	170
Effect of dilutive stock options and restricted stock awards	1	1
Weighted average common shares for diluted earnings per share	168	171
Basic earnings per share	$ 0.54	$ 0.59
Diluted earnings per share	$ 0.53	$ 0.58

Earnings per Share - Additional

Earnings per Share - Additional Information (Detail) - shares shares in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Anti-dilutive shares excluded from computation of earnings per share, amount	1.1	0.8

Asset Dispositions and Impair43

Asset Dispositions and Impairments - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)Hotel	Mar. 31, 2015USD ($)	May. 06, 2016Hotel	Dec. 31, 2015USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from asset sales, net	$ 83
Deferred gains on dispositions of assets	1,412			$ 1,412
Gain on disposition of assets	$ 2
Gain related to sale of a minority partnership interest		$ 17
Long-term management agreements [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of wholly-owned hotels sold | Hotel	1
Proceeds from asset sales, net	$ 79
Long-term management agreements [Member] | Subsequent Event [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of foreign wholly-owned hotels expected to be sold | Hotel			2
One wholly-owned hotel [Member] | Long-term management agreements [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Deferred gains on dispositions of assets	$ 5

Transfers of Financial Assets -

Transfers of Financial Assets - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)Transactions	Mar. 31, 2015USD ($)
Transfers And Servicing [Abstract]
Number of securitization transactions in which company has variable interest | Transactions	3
Principal amount of repurchased or replaced defaulted VOI notes receivable	$ 2	$ 3
Obligation to receive cash flows from VIE	$ 6	$ 8

Vacation Ownership Notes Rece45

Vacation Ownership Notes Receivable - Notes Receivable (Net of Reserves) Related to Vacation Ownership Loans (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]
Net notes receivable	$ 621	$ 616
Vacation ownership loans – securitized	(31)	(32)
Vacation ownership loans – unsecuritized	(44)	(41)
Notes receivable noncurrent	546	543
Vacation ownership loans - securitized [Member]
Accounts Notes And Loans Receivable [Line Items]
Net notes receivable	158	173
Vacation ownership loans - unsecuritized [Member]
Accounts Notes And Loans Receivable [Line Items]
Net notes receivable	$ 463	$ 443

Vacation Ownership Notes Rece46

Vacation Ownership Notes Receivable - Interest Income Related to VOI Notes Receivable (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Receivables [Abstract]
Vacation ownership loans – securitized	$ 6	$ 9
Vacation ownership loans – unsecuritized	15	12
Interest income related to VOI notes receivable, net	$ 21	$ 21

Vacation Ownership Notes Rece47

Vacation Ownership Notes Receivable - Future Maturities of Gross VOI Notes Receivable and Interest Rates (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]
2,016	$ 65
2,017	81
2,018	77
2,019	76
2,020	75
Thereafter	341
Total gross VOI notes receivable	$ 715	$ 708
Weighted average interest rates at March 31, 2016	13.00%
Range of interest rates, Minimum	5.00%
Range of interest rates, Maximum	17.00%
Vacation ownership loans - securitized [Member]
Accounts Notes And Loans Receivable [Line Items]
2,016	$ 25
2,017	32
2,018	29
2,019	26
2,020	23
Thereafter	36
Total gross VOI notes receivable	$ 171
Weighted average interest rates at March 31, 2016	13.22%
Range of interest rates, Minimum	6.00%
Range of interest rates, Maximum	17.00%
Vacation ownership loans - unsecuritized [Member]
Accounts Notes And Loans Receivable [Line Items]
2,016	$ 40
2,017	49
2,018	48
2,019	50
2,020	52
Thereafter	305
Total gross VOI notes receivable	$ 544
Weighted average interest rates at March 31, 2016	12.94%
Range of interest rates, Minimum	5.00%
Range of interest rates, Maximum	17.00%

Vacation Ownership Notes Rece48

Vacation Ownership Notes Receivable - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Receivables [Abstract]
Average estimated default rate for the company's pool of receivables	9.10%	9.10%
Projected default rate on impact to loan loss reserve	0.10%
Default rate change impact on loan loss reserve	$ 5
Maximum outstanding period for note receivable being delinquent	30 days
Delinquent notes receivable	$ 45	$ 46
Number of days loan consider to be in default	120 days

Vacation Ownership Notes Rece49

Vacation Ownership Notes Receivable - Loan Loss Reserve (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	$ 92	$ 96
Provisions for loan losses	8	3
Write-offs	(6)	(6)
Ending Balance	94	93
Vacation ownership loans - securitized [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	15	28
Provisions for loan losses		(1)
Other	(2)	(3)
Ending Balance	13	24
Vacation ownership loans - unsecuritized [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	77	68
Provisions for loan losses	8	4
Write-offs	(6)	(6)
Other	2	3
Ending Balance	$ 81	$ 69

Vacation Ownership Notes Rece50

Vacation Ownership Notes Receivable - Balances of VOI Notes Receivable by Brand and by FICO Score (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]
Total receivables	$ 715	$ 708
Sheraton [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	385	384
Westin [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	317	311
Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	13	13
700+ [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	363	357
700+ [Member] | Sheraton [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	165	165
700+ [Member] | Westin [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	191	185
700+ [Member] | Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	7	7
600-699 [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	235	236
600-699 [Member] | Sheraton [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	145	145
600-699 [Member] | Westin [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	88	89
600-699 [Member] | Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	2	2
Less than 600 [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	18	19
Less than 600 [Member] | Sheraton [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	13	14
Less than 600 [Member] | Westin [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	5	5
No Score [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	99	96
No Score [Member] | Sheraton [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	62	60
No Score [Member] | Westin [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	33	32
No Score [Member] | Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Total receivables	$ 4	$ 4

Vacation Ownership Notes Rece51

Vacation Ownership Notes Receivable - Past Due Balances of VOI Notes Receivable (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable Recorded Investment Past Due [Line Items]
Total receivables	$ 715	$ 708
Current	670	662
Total Delinquent	45	46
Delinquent 30-59 Days [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Delinquent	9	12
Delinquent 60-89 Days [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Delinquent	7	7
Delinquent >90 Days [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Delinquent	$ 29	$ 27

Debt - Long-Term Debt and Short

Debt - Long-Term Debt and Short-Term Borrowings Excluding Securitized Vacation Ownership Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Long-term debt and short-term borrowings
Capital lease obligations	$ 159	$ 169
Commercial paper	591	408
Debt, total	2,352	2,177
Less current maturities	(34)	(33)
Long-term debt	2,318	2,144
Senior Notes, interest at 6.75%, maturing 2018 [Member]
Long-term debt and short-term borrowings
Senior Notes	373	372
Senior Notes, interest at 7.15%, maturing 2019 [Member]
Long-term debt and short-term borrowings
Senior Notes	211	209
Senior Notes, interest at 3.125%, maturing 2023 [Member]
Long-term debt and short-term borrowings
Senior Notes	346	346
Senior Notes, interest at 3.75%, maturing 2025 [Member]
Long-term debt and short-term borrowings
Senior Notes	344	344
Senior Notes, interest at 4.50%, maturing 2034 [Member]
Long-term debt and short-term borrowings
Senior Notes	289	289
Mortgages and other, interest rates ranging from non-interest bearing to 3.65%, various maturities [Member]
Long-term debt and short-term borrowings
Other long-term debt	$ 39	$ 40

Debt - Long-Term Debt and Sho53

Debt - Long-Term Debt and Short-Term Borrowings Excluding Securitized Vacation Ownership Debt (Parenthetical) (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Commercial paper, weighted average interest at 0.781% at March 31, 2016 [Member]
Debt Instrument [Line Items]
Interest rate, weighted average	0.781%
Senior Notes, interest at 6.75%, maturing 2018 [Member]
Debt Instrument [Line Items]
Interest rate, stated rate	6.75%	6.75%
Senior Notes, interest at 7.15%, maturing 2019 [Member]
Debt Instrument [Line Items]
Interest rate, stated rate	7.15%	7.15%
Senior Notes, interest at 3.125%, maturing 2023 [Member]
Debt Instrument [Line Items]
Interest rate, stated rate	3.125%	3.125%
Senior Notes, interest at 3.75%, maturing 2025 [Member]
Debt Instrument [Line Items]
Interest rate, stated rate	3.75%	3.75%
Senior Notes, interest at 4.50%, maturing 2034 [Member]
Debt Instrument [Line Items]
Interest rate, stated rate	4.50%	4.50%
Mortgages and other, interest rates ranging from non-interest bearing to 3.65%, various maturities [Member]
Debt Instrument [Line Items]
Minimum Interest Rate, Stated Percentage on Revolving Credit Facilities	0.00%	0.00%
Maximum Interest Rate, Stated Percentage on Revolving Credit Facilities	3.65%	3.65%

Securitized Vacation Ownershi54

Securitized Vacation Ownership Debt - Long-Term and Short-Term Securitized Vacation Ownership Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term debt including current maturities	$ 156	$ 171
Less current maturities	(45)	(48)
Long-term securitized debt	111	123
2010 securitization, interest rates ranging from 3.65% to 4.75%, maturing 2021 [Member]
Debt Instrument [Line Items]
Long-term debt including current maturities	43	48
2011 securitization, interest rates ranging from 3.67% to 4.82%, maturing 2025 [Member]
Debt Instrument [Line Items]
Long-term debt including current maturities	56	61
2012 securitization, interest rates ranging from 2.00% to 2.76%, maturing 2023 [Member]
Debt Instrument [Line Items]
Long-term debt including current maturities	$ 57	$ 62

Securitized Vacation Ownershi55

Securitized Vacation Ownership Debt - Long-Term and Short-Term Securitized Vacation Ownership Debt (Parenthetical) (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
2010 securitization, interest rates ranging from 3.65% to 4.75%, maturing 2021 [Member]
Debt Instrument [Line Items]
Interest rate minimum	3.65%	3.65%
Interest rate maximum	4.75%	4.75%
Maturity year of update instrument	2,021	2,021
2011 securitization, interest rates ranging from 3.67% to 4.82%, maturing 2025 [Member]
Debt Instrument [Line Items]
Interest rate minimum	3.67%	3.67%
Interest rate maximum	4.82%	4.82%
Maturity year of update instrument	2,025	2,025
2012 securitization, interest rates ranging from 2.00% to 2.76%, maturing 2023 [Member]
Debt Instrument [Line Items]
Interest rate minimum	2.00%	2.00%
Interest rate maximum	2.76%	2.76%
Maturity year of update instrument	2,023	2,023

Other Liabilities - Summary of

Other Liabilities - Summary of Other Liabilities (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Deferred gains on asset sales	$ 1,328	$ 1,329
SPG point liability	818	830
Deferred revenue	43	46
Benefit plan liabilities	44	45
Deferred rent	26	27
Insurance reserves	48	47
Other	100	97
Other liabilities	$ 2,407	$ 2,421

Other Liabilities - Additional

Other Liabilities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Other Liabilities [Line Items]
Deferred gains on sale of assets included in accrued expenses and other liabilities	$ 1,412		$ 1,412
Amortization of deferred gains	21	$ 22
SPG [Member]
Other Liabilities [Line Items]
Total actuarial liability	1,195		1,219
Accrued expenses	$ 481		$ 491

Restructuring and Other Speci58

Restructuring and Other Special Charges (Credits), Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and other special charges (credits), net	$ 39	$ 31
Restructuring costs	8	8
Other special charges, net	31	23
Restructuring reserves	9		$ 10
Accrued expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserves	3		$ 5
Marriott International Inc
Restructuring Cost and Reserve [Line Items]
Other special charges	19
Spinoff [Member]
Restructuring Cost and Reserve [Line Items]
Other special charges	7	6
Technology Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Other special charges	$ 2
Prior President and Chief Executive Officer and our interim Chief Executive Officer [Member]
Restructuring Cost and Reserve [Line Items]
Other special charges		7
Litigation Reserve [Member]
Restructuring Cost and Reserve [Line Items]
Other special charges		$ 6

Restructuring and Other Speci59

Restructuring and Other Special Charges (Credits), Net - Summary of Restructuring Related Accruals (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 10
Expenses/ Reversals	8	$ 8
Payments	(9)
Ending balance	9
Severance costs related to cost savings initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	2
Expenses/ Reversals	(1)
Ending balance	1
Vacation ownership exit cost from ceased projects [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	4
Ending balance	4
Other [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	4
Expenses/ Reversals	9
Payments	(9)
Ending balance	$ 4

Derivative Financial Instrume60

Derivative Financial Instruments - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016USD ($)Derivative$ / €
Forward contracts [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Notional amount of forward contracts	$ 1,087,000,000
Maturity period of forward contracts, less than	1 year
Euro forward contracts [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Notional amount of forward contracts	$ 45,000,000
Average exchange rate on forward contracts | $ / €	1.13
Maturity period of forward contracts, less than	1 year
Interest rate swaps [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Notional amount of forward contracts	$ 250,000,000
Number of interest rate swap agreements | Derivative	5
Interest rate swap agreements maturity date	2018 and 2019

Derivative Financial Instrume61

Derivative Financial Instruments - Fair Values of Derivative Instruments (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Derivatives designated as hedging instruments [Member]
Derivatives Fair Value [Line Items]
Derivative Asset	$ 7	$ 5
Derivatives designated as hedging instruments [Member] | Interest rate swaps [Member] | Other assets [Member]
Derivatives Fair Value [Line Items]
Derivative Asset	7	4
Derivatives designated as hedging instruments [Member] | Forward contracts [Member] | Prepaid expenses and other [Member]
Derivatives Fair Value [Line Items]
Derivative Asset		1
Derivatives designated as hedging instruments [Member] | Forward contracts [Member] | Accrued expenses [Member]
Derivatives Fair Value [Line Items]
Derivative Liability	1
Derivatives not designated as hedging instruments [Member] | Forward contracts [Member] | Prepaid expenses and other [Member]
Derivatives Fair Value [Line Items]
Derivative Asset	14	9
Derivatives not designated as hedging instruments [Member] | Forward contracts [Member] | Accrued expenses [Member]
Derivatives Fair Value [Line Items]
Derivative Liability	$ 6	$ 1

Derivative Financial Instrume62

Derivative Financial Instruments - Derivative Instruments Gain (Loss) Recognized in Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Foreign forward exchange contracts [Member] | Interest expense, net [Member] | Derivatives not designated as hedging instruments [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ (3)	$ (28)

Pension and Postretirement Be63

Pension and Postretirement Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Contribution to pension and postretirement benefit plans	$ 2
Pension and postretirement benefit plans, expected contribution for the remainder of 2016	9
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	1	$ 1
Net actuarial losses reclassified from accumulated other comprehensive income	$ 1	$ 1

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
Income Tax Disclosure [Abstract]
Total unrecognized tax benefits	$ 312
Tax benefits affecting effective tax rate	105
Unrecognized tax benefits impact in the next twelve months	9
Payment of interest accrued	21
Accrued penalties related to unrecognized tax benefits	2
Tax benefit related to foreign tax audit	$ 2

Stockholders' Equity - Equity A

Stockholders' Equity - Equity Attributable to Starwood's Stockholders (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule Of Stockholders Equity [Line Items]
Beginning Balance	$ 1,299
Net income	90	$ 99
Equity compensation activity and other	(2)
Dividends	(63)
Other comprehensive income	23	$ (110)
Ending Balance	1,347
Common Shares [Member]
Schedule Of Stockholders Equity [Line Items]
Beginning Balance	2
Ending Balance	2
Additional Paid-in Capital [Member]
Schedule Of Stockholders Equity [Line Items]
Beginning Balance	115
Ending Balance	115
Accumulated Other Comprehensive Loss [Member]
Schedule Of Stockholders Equity [Line Items]
Beginning Balance	(668)
Other comprehensive income	23
Ending Balance	(645)
Retained Earnings [Member]
Schedule Of Stockholders Equity [Line Items]
Beginning Balance	1,847
Net income	90
Equity compensation activity and other	(2)
Dividends	(63)
Ending Balance	1,872
Equity Attributable to Noncontrolling Interests [Member]
Schedule Of Stockholders Equity [Line Items]
Beginning Balance	3
Ending Balance	$ 3

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)$ / sharesshares
Disclosure - Stockholders' Equity - Additional Information (Detail) [Line Items]
Shares repurchased | shares	0
Remaining capacity for authorized repurchase shares | $	$ 458
Dividends paid | $	$ 63
Dividends paid per share | $ / shares	$ 0.375
Dividends record date	Mar. 14, 2016
Maximum [Member]
Disclosure - Stockholders' Equity - Additional Information (Detail) [Line Items]
Common stock issued as a result of option exercises | shares	100,000

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ (668)
Other comprehensive income (loss) before reclassifications	23
Amounts reclassified from accumulated other comprehensive income (loss)	(1)
Total before tax	22
Tax benefit (expense)	1
Total other comprehensive income (loss), net of taxes	23	$ (110)
Ending balance	(645)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	1
Other comprehensive income (loss) before reclassifications	(2)
Total before tax	(2)
Total other comprehensive income (loss), net of taxes	(2)
Ending balance	(1)
Net Investment Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss)	(2)
Total before tax	(2)
Tax benefit (expense)	1
Total other comprehensive income (loss), net of taxes	(1)
Ending balance	(1)
Defined Benefit Pension and Postretirement Benefit Plans [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(79)
Amounts reclassified from accumulated other comprehensive income (loss)	1
Total before tax	1
Total other comprehensive income (loss), net of taxes	1
Ending balance	(78)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(590)
Other comprehensive income (loss) before reclassifications	25
Total before tax	25
Total other comprehensive income (loss), net of taxes	25
Ending balance	$ (565)

Stockholders' Equity - Summar68

Stockholders' Equity - Summary of Changes in Accumulated Other Comprehensive Loss (Parenthetical) (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
Equity [Abstract]
Foreign currency translation adjustments	$ (21)

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of performance shares	3 years
Performance period earliest	Jan. 1, 2016
Performance period latest	Dec. 31, 2018
Compensation expense, net of reimbursements	$ 13	$ 14
Unrecognized compensation cost, net of estimated forfeitures	$ 98
Weighted-average period of unrecognized compensation cost, expected to be recognized	1 year 8 months 12 days
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted during the period	164,000
Weighted average grant date fair value	$ 84.64
Restricted stock and restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted during the period	1,007,000
Weighted average grant date fair value	$ 68.96

Fair Value - Carrying Amounts a

Fair Value - Carrying Amounts and Estimated Fair Values of Long-Term Financial Instruments (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Assets:
Restricted cash	$ 68	$ 54
Securitized vacation ownership notes receivable, Carrying Amount	127	141
Total financial assets, Carrying Amount	623	610
Liabilities:
Long-term debt, Carrying Amount	2,318	2,144
Long-term securitized debt	111	123
Total financial liabilities, Carrying Amount	2,429	2,267
Assets:
Total financial assets, Fair Value	753	736
Liabilities:
Total financial liabilities, Fair Value	2,523	2,304
Off-Balance sheet:
Surety bonds, Fair Value	30
Total off-balance sheet, Fair Value	108	112
Level 1 [Member]
Assets:
Restricted cash	4	4
Liabilities:
Long-term debt, Carrying Amount	2,318	2,144
Assets:
Restricted cash, Fair Value	4	4
Liabilities:
Long-term debt, Fair Value	2,410	2,178
Level 3 [Member]
Assets:
VOI notes receivable, Carrying Amount	419	402
Securitized vacation ownership notes receivable, Carrying Amount	127	141
Other notes receivable, Carrying Amount	73	63
Liabilities:
Long-term securitized debt	111	123
Assets:
VOI notes receivable, Fair Value	518	495
Securitized vacation ownership notes receivable, Fair Value	158	174
Other notes receivable, Fair Value	73	63
Liabilities:
Long-term securitized debt, Fair Value	113	126
Level 2 [Member]
Off-Balance sheet:
Letters of credit, Fair Value	78	80
Surety bonds, Fair Value	$ 30	$ 32

Segment Information - Additiona

Segment Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016Hotel
Segment Reporting [Abstract]
Number of hotel segments	3

Segment Information - Revenues

Segment Information - Revenues and Segment Earnings (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Total revenues	$ 1,404	$ 1,415
Other revenues from managed and franchised hotels	698	672
Corporate selling, general, administrative and other expenses — unallocated	(86)	(91)
Gain (loss) on asset dispositions and impairments, net	2	14
Restructuring and other special (charges) credits	(39)	(31)
Adjustments to equity earnings	(7)	(5)
Interest expense	(24)	(32)
Depreciation and amortization	(70)	(69)
Income tax expense	(53)	(52)
Net income attributable to Starwood	90	99
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	680	718
Total segment earnings	286	289
Operating Segments [Member] | Americas Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	342	369
Total segment earnings	167	165
Operating Segments [Member] | EAME [Member]
Segment Reporting Information [Line Items]
Total revenues	86	98
Total segment earnings	29	29
Operating Segments [Member] | Asia Pacific Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	68	65
Total segment earnings	48	46
Operating Segments [Member] | Vacation ownership and residential [Member]
Segment Reporting Information [Line Items]
Total revenues	184	186
Total segment earnings	42	49
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Other revenues from managed and franchised hotels	698	672
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	26	25
Other corporate income — unallocated	28	26
Corporate selling, general, administrative and other expenses — unallocated	$ (33)	$ (41)

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016USD ($)Hotel	Dec. 31, 2015USD ($)Hotel
Variable Interest Entity [Line Items]
Total number of hotels in which company has variable interest entity | Hotel	23	22
Loans to owners	$ 48,000,000
Unfunded loan commitments expected to be funded in total	49,000,000
Unfunded loan commitments to be funded in next twelve months	34,000,000
Equity and other potential contributions associated with managed, franchised or joint venture properties	226,000,000
Equity and other potential contributions associated with managed, franchised or joint venture properties expected to be funded within one year	74,000,000
Surety bonds issued	30,000,000
Range of possible loss, minimum	0
Range of possible loss, maximum	28,000,000
Performance Guarantee [Member]
Variable Interest Entity [Line Items]
Cure of a performance guarantee	$ 4,000,000
Number of hotels | Hotel	2
VIEs 23 [Member]
Variable Interest Entity [Line Items]
Investment associated with VIEs	$ 108,000,000
Loan balance with VIEs	$ 1,000,000
VIEs 22 [Member]
Variable Interest Entity [Line Items]
Investment associated with VIEs		$ 106,000,000
Loan balance with VIEs		$ 1,000,000

Planned Reverse Morris Trust Tr

Planned Reverse Morris Trust Transaction - Additional Information (Detail) - Vistana Signature Experiences Inc [Member]	Oct. 27, 2015Property
Restructuring Cost and Reserve [Line Items]
Number of owned properties transfer to new entity	5
Subsidiary cumulative percentage ownership after all transactions	55.00%
ILG [Member]
Restructuring Cost and Reserve [Line Items]
Subsidiary cumulative percentage ownership after all transactions	45.00%

Planned Marriott Merger - Addit

Planned Marriott Merger - Additional Information (Detail) - Marriott International Inc	3 Months Ended
	Mar. 31, 2016	Jun. 30, 2016Director	Nov. 15, 2015$ / sharesshares
Business Acquisition [Line Items]
Date of merger agreement	Nov. 15, 2015
Agreement amendment date	Mar. 20, 2016
Transaction approval date	Apr. 8, 2016
Number of shares received by shareholders of acquiree for each acquirer share | shares			0.80
Cash received by shareholders, per share | $ / shares			$ 21
Shareholder ownership percentage after merger			34.00%
Scenario Forecast [Member]
Business Acquisition [Line Items]
Number of board of directors before merger		11
Number of board of directors after merger		14