Marriott International (MAR) 10-Q 10 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 26, 2018
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	MAR
Entity Registrant Name	MARRIOTT INTERNATIONAL INC /MD/
Entity Central Index Key	1,048,286
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		353,355,376

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
REVENUES
Base management fees	$ 273	$ 264
Franchise fees	417	355
Incentive management fees	155	140
Gross fee revenues	845	759
Contract investment amortization	(18)	(11)
Net fee revenues	827	748
Owned, leased, and other revenue	406	428
Cost reimbursement revenue	3,773	3,736
Revenues	5,006	4,912
OPERATING COSTS AND EXPENSES
Owned, leased, and other-direct	336	356
Depreciation, amortization, and other	54	51
General, administrative, and other	247	212
Merger-related costs and charges	34	51
Reimbursed expenses	3,835	3,696
Costs and expenses	4,506	4,366
OPERATING INCOME	500	546
Gains and other income, net	59	0
Interest expense	(75)	(70)
Interest income	5	7
Equity in earnings	13	11
INCOME BEFORE INCOME TAXES	502	494
Provision for income taxes	(104)	(123)
NET INCOME	$ 398	$ 371
EARNINGS PER SHARE
Earnings per share - basic (in USD per share)	$ 1.11	$ 0.96
Earnings per share - diluted (in USD per share)	1.09	0.95
CASH DIVIDENDS DECLARED PER SHARE (in USD per share)	$ 0.33	$ 0.30

CONDENSED CONSOLIDATED STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 398	$ 371
Other comprehensive income:
Foreign currency translation adjustments	152	188
Derivative instrument adjustments, net of tax	(3)	(2)
Unrealized gain (loss) on available-for-sale securities, net of tax	0	(1)
Pension and postretirement adjustments, net of tax	0	0
Reclassification of losses (gains), net of tax	13	0
Net other comprehensive income (loss)	162	185
Comprehensive income	$ 560	$ 556

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and equivalents	$ 701	$ 383
Accounts and notes receivable, net	2,098	1,973
Prepaid expenses and other	232	235
Assets held for sale	121	149
Assets, current, total	3,152	2,740
Property and equipment, net	1,791	1,793
Intangible assets
Goodwill	9,270	9,207
Goodwill and intangible assets, net, total	17,864	17,751
Equity method investments	754	734
Notes receivable, net	147	142
Deferred tax assets	172	93
Other noncurrent assets	604	593
Total assets	24,484	23,846
Current liabilities
Current portion of long-term debt	988	398
Accounts payable	766	783
Accrued payroll and benefits	1,163	1,214
Liability for guest loyalty programs	2,238	2,121
Accrued expenses and other	1,314	1,291
Liabilities, current, total	6,469	5,807
Long-term debt	7,858	7,840
Liability for guest loyalty programs	3,029	2,819
Deferred tax liabilities	634	605
Deferred revenue	645	583
Other noncurrent liabilities	2,283	2,610
Shareholders’ equity
Class A Common Stock	5	5
Additional paid-in-capital	5,685	5,770
Retained earnings	7,898	7,242
Treasury stock, at cost	(10,163)	(9,418)
Accumulated other comprehensive income (loss)	141	(17)
Stockholders' equity (deficit) attributable to parent	3,566	3,582
Liabilities and equity (deficit), total	24,484	23,846
Brands
Intangible assets
Intangible assets	5,972	5,922
Contract acquisition costs and other
Intangible assets
Intangible assets	$ 2,622	$ 2,622

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
OPERATING ACTIVITIES
Net income	$ 398
Adjustments to reconcile to cash provided by operating activities:
Depreciation, amortization, and other	73
Share-based compensation	42
Income taxes	16
Liability for guest loyalty programs	325
Contract acquisition costs	(29)
Merger-related charges	(16)
Working capital changes	(185)
(Gain) loss on asset dispositions	(60)
Other	111
Net cash provided by (used in) operating activities	675
INVESTING ACTIVITIES
Capital expenditures	(64)
Dispositions	108
Loan advances	(12)
Loan collections	5
Other	12
Net cash provided by investing activities	49
FINANCING ACTIVITIES
Commercial paper/Credit facility, net	627
Issuance of long-term debt	0
Repayment of long-term debt	(13)
Issuance of Class A Common Stock	4
Dividends paid	(118)
Purchase of treasury stock	(815)
Share-based compensation withholding taxes	(95)
Net cash provided by (used in) financing activities	(410)
INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	314
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, beginning of period	429
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, end of period	743
Restricted cash	$ 42

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION The condensed consolidated financial statements present the results of operations, financial position, and cash flows of Marriott International, Inc. and subsidiaries (referred to in this report as “we,” “us,” “Marriott,” or “the Company”). In order to make this report easier to read, we also refer throughout to (i) our Condensed Consolidated Financial Statements as our “Financial Statements,” (ii) our Condensed Consolidated Statements of Income as our “Income Statements,” (iii) our Condensed Consolidated Balance Sheets as our “Balance Sheets,” (iv) our Condensed Consolidated Statements of Cash Flows as our “Statements of Cash Flows,” (v) our properties, brands, or markets in the United States (“U.S.”) and Canada as “North America” or “North American,” and (vi) our properties, brands, or markets in our Caribbean and Latin America, Europe, and Middle East and Africa regions as “Other International,” and together with those in our Asia Pacific segment, as “International.” In addition, references throughout to numbered “Footnotes” refer to the numbered Notes in these Notes to Condensed Consolidated Financial Statements, unless otherwise noted. These Financial Statements have not been audited. We have condensed or omitted certain information and footnote disclosures normally included in financial statements presented in accordance with U.S. generally accepted accounting principles (“GAAP”). The financial statements in this report should be read in conjunction with the consolidated financial statements and notes thereto in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017 (“ 2017 Form 10-K”). Certain terms not otherwise defined in this Form 10-Q have the meanings specified in our 2017 Form 10-K. Preparation of financial statements that conform with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the financial statements, the reported amounts of revenues and expenses during the reporting periods, and the disclosures of contingent liabilities. Accordingly, ultimate results could differ from those estimates. The accompanying Financial Statements reflect all normal and recurring adjustments necessary to present fairly our financial position as of March 31, 2018 and December 31, 2017 , and the results of our operations and cash flows for the three months ended March 31, 2018 and March 31, 2017 . Interim results may not be indicative of fiscal year performance because of seasonal and short-term variations. We have eliminated all material intercompany transactions and balances between entities consolidated in these Financial Statements. The accompanying Financial Statements also reflect our adoption of several new accounting standards. See the “New Accounting Standards Adopted” caption below for additional information. New Accounting Standards Not Yet Adopted Accounting Standards Update (“ASU”) 2016-02 “Leases” (Topic 842). ASU 2016-02 introduces a lessee model that brings substantially all leases onto the balance sheet. Under the new standard, a lessee will recognize on its balance sheet a lease liability and a right-of-use asset for most leases, including operating leases. The new standard will also distinguish leases as either finance leases or operating leases. This distinction will affect how leases are measured and presented in the income statement and statement of cash flows. The standard is effective for us beginning in our 2019 first quarter and requires the use of a modified retrospective transition method. We are still assessing the potential impact that ASU 2016-02 will have on our financial statements and disclosures, but we expect that it will have a material effect on our Balance Sheets. New Accounting Standards Adopted ASU 2016-18 “Restricted Cash” (Topic 230). ASU 2016-18 requires companies to include restricted cash with cash and cash equivalents when reconciling beginning and ending amounts shown on the statement of cash flows. We adopted ASU 2016-18 in the 2018 first quarter using the retrospective transition method, and accordingly, we revised prior period amounts, as shown in the “ Statements of Cash Flows ” table below. ASU 2016-16 “Accounting for Income Taxes: Intra-Entity Transfers of Assets Other than Inventory” (Topic 740). ASU 2016-16 requires companies to recognize the income tax effects of intercompany sales of assets other than inventory when the transfer occurs. We adopted ASU 2016-16 in the 2018 first quarter using the modified retrospective transition method and recorded an adjustment of $372 million for the cumulative effect to retained earnings at January 1, 2018. ASU 2016-15 “Classification of Certain Cash Receipts and Cash Payments” (Topic 230). ASU 2016-15 specifies how certain cash receipts and payments are to be classified in the statement of cash flows and primarily impacts our presentation of cash outflows for commercial paper. Under ASU 2016-15, we are required to attribute a portion of the payments to accreted interest and classify that portion as cash outflows for operating activities. We adopted ASU 2016-15 in the 2018 first quarter using the retrospective transition method, and accordingly, we revised prior period amounts, as shown in the “ Statements of Cash Flows ” table below. ASU 2016-01 “Recognition and Measurement of Financial Assets and Financial Liabilities” (Topic 825). ASU 2016-01 eliminates the available-for-sale classification for equity investments and requires companies to measure equity investments at fair value and recognize any changes in the fair value in net income. We adopted ASU 2016-01 in the 2018 first quarter using the modified retrospective transition method and recorded a cumulative-effect adjustment of $4 million to retained earnings at January 1, 2018. ASU 2014-09 “Revenue from Contracts with Customers” (Topic 606). ASU 2014-09 and several related ASUs (collectively referred to as “ASU 2014-09”) supersede the revenue recognition requirements in Topic 605, Revenue Recognition , as well as most industry-specific guidance, and provide a principles-based, comprehensive framework in Topic 606, Revenue Recognition. ASU 2014-09 also specifies the accounting for certain costs to obtain or fulfill a contract with a customer and provides enhanced disclosure requirements. We adopted ASU 2014-09 in the 2018 first quarter using the full retrospective transition method. See Footnote 2. Revenues for disclosures required by ASU 2014-09, including our revenue recognition accounting policies. When we adopted ASU 2014-09, we applied the following expedients and exemptions, which are allowed by the standard, to our prior period Financial Statements and disclosures: • We used the transaction price at the date of contract completion for our contracts that had variable consideration and were completed before January 1, 2018. • We considered the aggregate effect of all contract modifications that occurred before January 1, 2016 when: (1) identifying satisfied and unsatisfied performance obligations; (2) determining the transaction price; and (3) allocating the transaction price to the satisfied and unsatisfied performance obligations. • We did not: (1) disclose the amount of the transaction price that we allocated to remaining performance obligations; or (2) include an explanation of when we expect to recognize the revenue allocated to remaining performance obligations. The cumulative effect of adopting ASU 2014-09 was a decrease in 2016 retained earnings of approximately $264 million . The following tables present the effect of the adoption of ASUs 2014-09, 2016-15, and 2016-18 on our Financial Statements included in this report. Income Statements Three Months Ended Three Months Ended ($ in millions, except per share amounts) March 31, 2017 (As Previously Reported) Adoption of ASU 2014-09 March 31, 2017 (As Adjusted) REVENUES Base management fees $ 264 $ — $ 264 Franchise fees 365 (10 ) 355 Incentive management fees 153 (13 ) 140 Gross fee revenues 782 (23 ) 759 Contract investment amortization — (11 ) (11 ) Net fee revenues 782 (34 ) 748 Owned, leased, and other revenue 439 (11 ) 428 Cost reimbursement revenue 4,340 (604 ) 3,736 5,561 (649 ) 4,912 OPERATING COSTS AND EXPENSES Owned, leased, and other-direct 358 (2 ) 356 Depreciation, amortization, and other 65 (14 ) 51 General, administrative, and other 210 2 212 Merger-related costs and charges 51 — 51 Reimbursed expenses 4,340 (644 ) 3,696 5,024 (658 ) 4,366 OPERATING INCOME 537 9 546 Gains and other income, net — — — Interest expense (70 ) — (70 ) Interest income 7 — 7 Equity in earnings 11 — 11 INCOME BEFORE INCOME TAXES 485 9 494 Provision for income taxes (120 ) (3 ) (123 ) NET INCOME $ 365 $ 6 $ 371 EARNINGS PER SHARE Earnings per share - basic $ 0.95 $ 0.01 $ 0.96 Earnings per share - diluted $ 0.94 $ 0.01 $ 0.95 Statements of Comprehensive Income Three Months Ended Three Months Ended ($ in millions) March 31, 2017 (As Previously Reported) Adoption of ASU 2014-09 March 31, 2017 (As Adjusted) Net income $ 365 $ 6 $ 371 Other comprehensive income (loss): Foreign currency translation adjustments 188 — 188 Derivative instrument adjustments, net of tax (2 ) — (2 ) Unrealized (loss) gain on available-for-sale securities, net of tax (1 ) — (1 ) Pension and postretirement adjustments, net of tax — — — Reclassification of losses, net of tax — — — Total other comprehensive income, net of tax 185 — 185 Comprehensive income $ 550 $ 6 $ 556 Balance Sheets ($ in millions) December 31, 2017 (As Previously Reported) (1) Adoption of ASU 2014-09 December 31, 2017 (As Adjusted) ASSETS Current assets Cash and equivalents $ 383 $ — $ 383 Accounts and notes receivable, net 1,999 (26 ) 1,973 Prepaid expenses and other 216 19 235 Assets held for sale 149 — 149 2,747 (7 ) 2,740 Property and equipment, net 1,793 — 1,793 Intangible assets Brands 5,922 — 5,922 Contract acquisition costs and other 2,884 (262 ) 2,622 Goodwill 9,207 — 9,207 18,013 (262 ) 17,751 Equity method investments 735 (1 ) 734 Notes receivable, net 142 — 142 Deferred tax assets 93 — 93 Other noncurrent assets 426 167 593 $ 23,949 $ (103 ) $ 23,846 LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT) Current liabilities Current portion of long-term debt $ 398 $ — $ 398 Accounts payable 783 — 783 Accrued payroll and benefits 1,214 — 1,214 Liability for guest loyalty programs 2,064 57 2,121 Accrued expenses and other 1,541 (250 ) 1,291 6,000 (193 ) 5,807 Long-term debt 7,840 — 7,840 Liability for guest loyalty programs 2,876 (57 ) 2,819 Deferred tax liabilities 604 1 605 Deferred revenue 145 438 583 Other noncurrent liabilities 2,753 (143 ) 2,610 Shareholders' equity Class A Common Stock 5 — 5 Additional paid-in-capital 5,770 — 5,770 Retained earnings 7,391 (149 ) 7,242 Treasury stock, at cost (9,418 ) — (9,418 ) Accumulated other comprehensive loss (17 ) — (17 ) 3,731 (149 ) 3,582 $ 23,949 $ (103 ) $ 23,846 (1) Includes reclassifications among various captions, including Deferred revenue and Other noncurrent liabilities, to conform to current period presentation. Statements of Cash Flows Three Months Ended Three Months Ended ($ in millions) March 31, 2017 (As Previously Reported) Adoption of ASU 2014-09 Adoption of ASUs 2016-18 and 2016-15 March 31, 2017 (As Adjusted) OPERATING ACTIVITIES Net income $ 365 $ 6 $ — $ 371 Adjustments to reconcile to cash provided by operating activities: Depreciation, amortization, and other 65 (3 ) — 62 Share-based compensation 48 — — 48 Income taxes 82 4 — 86 Liability for guest loyalty program 60 9 — 69 Contract acquisition costs — (53 ) — (53 ) Merger-related charges (36 ) — — (36 ) Working capital changes (108 ) (28 ) 1 (135 ) (Gain) loss on asset dispositions 1 — — 1 Other 49 7 (7 ) 49 Net cash provided by (used in) operating activities 526 (58 ) (6 ) 462 INVESTING ACTIVITIES Capital expenditures (48 ) — — (48 ) Dispositions 311 — — 311 Loan advances (28 ) — — (28 ) Loan collections 7 — — 7 Contract acquisition costs (54 ) 54 — — Other (4 ) 4 1 1 Net cash provided by investing activities 184 58 1 243 FINANCING ACTIVITIES Commercial paper/Credit Facility, net (33 ) — 7 (26 ) Issuance of long-term debt 1 — — 1 Repayment of long-term debt (4 ) — — (4 ) Issuance of Class A Common Stock 2 — — 2 Dividends paid (115 ) — — (115 ) Purchase of treasury stock (582 ) — — (582 ) Share-based compensation withholding taxes (99 ) — — (99 ) Net cash provided by (used in) financing activities (830 ) — 7 (823 ) (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH (120 ) — 2 (118 ) CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, beginning of period 858 — 29 887 CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, end of period $ 738 $ — $ 31 $ 769 See Footnote 10. Other Comprehensive Income (Loss) and Shareholders’ Equity for the impact of the adoption of new accounting standards on our shareholders’ equity.

Revenues

Revenues	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenues	REVENUES Disaggregation of Revenues The following tables present our revenues disaggregated by major revenue stream for the 2018 first quarter and the 2017 first quarter . Three Months Ended March 31, 2018 ($ in millions) North American Full Service North American Limited Service Asia Pacific Other International Total Gross fee revenues $ 299 $ 196 $ 117 $ 122 $ 734 Contract investment amortization (11 ) (3 ) — (4 ) (18 ) Net fee revenues 288 193 117 118 716 Owned, leased, and other revenue 155 33 47 158 393 Cost reimbursement revenue 2,856 535 111 251 3,753 Total segment revenue $ 3,299 $ 761 $ 275 $ 527 $ 4,862 Unallocated corporate 144 Total revenue $ 5,006 Three Months Ended March 31, 2017 ($ in millions) North American Full Service North American Limited Service Asia Pacific Other International Total Gross fee revenues $ 289 $ 181 $ 97 $ 112 $ 679 Contract investment amortization (6 ) (3 ) — (2 ) (11 ) Net fee revenues 283 178 97 110 668 Owned, leased, and other revenue 197 31 41 149 418 Cost reimbursement revenue 2,760 532 103 253 3,648 Total segment revenue $ 3,240 $ 741 $ 241 $ 512 $ 4,734 Unallocated corporate 178 Total revenue $ 4,912 Performance Obligations For our managed hotels, we have performance obligations to provide hotel management services and a license to our hotel system intellectual property for the use of our brand names. As compensation for such services, we are generally entitled to receive base fees, which are a percentage of the revenues of hotels, and incentives fees, which are generally based on a measure of hotel profitability. Both the base and incentive management fees are variable consideration, as the transaction price is based on a percentage of revenue or profit, as defined in each contract. We recognize base management fees on a monthly basis over the term of the agreement as those amounts become payable. We recognize incentive management fees on a monthly basis over the term of the agreement based on each property's financial results, as long as we do not expect a significant reversal due to projected future hotel performance or cash flows in future periods. For our franchised hotels, we have a performance obligation to provide franchisees and operators a license to our hotel system intellectual property for use of certain of our brand names. As compensation for such services, we are typically entitled to initial application fees and ongoing royalty fees. Our ongoing royalty fees represent variable consideration, as the transaction price is based on a percentage of certain revenues of the hotels, as defined in each contract. We recognize royalty fees on a monthly basis over the term of the agreement as those amounts become payable. Initial application and relicensing fees are fixed consideration payable upon submission of a franchise application or renewal and are recognized on a straight-line basis over the initial or renewal term of the franchise agreements. Under our management and franchise agreements, we are entitled to be reimbursed for certain costs we incur on behalf of the managed, franchised, and licensed properties, with no added mark-up. These costs primarily consist of payroll and related expenses at managed properties where we are the employer of the employees at the properties, and include certain operational and administrative costs as provided for in our contracts with the owners. We are entitled to reimbursement in the period we incur the related reimbursable costs, which we recognize within the “ Cost reimbursement revenue ” caption of our Income Statements. Under our management and franchise agreements, hotel owners and franchisees participate in certain centralized programs and services, such as marketing, sales, reservations, and insurance programs. We operate these programs and services for the benefit of our hotel owners. We do not operate these programs and services to generate a profit over the contract term, and accordingly, when we recover the costs that we incur for these programs and services from our hotel owners, we do not seek a mark-up. The amounts we charge for these programs and services are generally based on sales or other variable metrics and are payable on a monthly basis. We recognize revenue within the “ Cost reimbursement revenue ” caption of our Income Statements when the amounts may be billed to hotel owners, and we recognize expenses within the “Reimbursed expenses” caption as they are incurred. This pattern of recognition results in temporary timing differences between the costs incurred for centralized programs and services and the related reimbursement from hotel owners in our operating and net income. Over the long term, these programs and services are not designed to impact our economics, either positively or negatively. In addition, proceeds from the sale of our interest in Avendra that we expend for the benefit of our hotel owners are included in “Reimbursed expenses”. We provide hotel design and construction review quality assurance (“Global Design”) services to our managed and franchised hotel owners, generally during the period prior to a hotel’s opening or during the period a hotel is converting to a Marriott brand (the “pre-opening period”). As compensation for such services, we may be entitled to receive a one-time fixed fee that is payable during the pre-opening period of the hotel. As these services are not a distinct performance obligation, we recognize the fees on a straight-line basis over the initial term of the management or franchise agreement within the “ Owned, leased, and other revenue ” caption of our Income Statements. At our owned and leased hotels, we have performance obligations to provide accommodations and other ancillary services to hotel guests. As compensation for such goods and services, we are typically entitled to a fixed nightly fee for an agreed upon period and additional fixed fees for any ancillary services purchased. These fees are generally payable at the time the hotel guest checks out of the hotel. We generally satisfy the performance obligations over time, and we recognize the revenue from room sales and from other ancillary guest services on a daily basis, as the rooms are occupied and we have rendered the services. Under our Loyalty Programs, we have a performance obligation to provide or arrange for the provision of goods or services for free or at a discount to Loyalty Program members in exchange for the redemption of points earned from past activities. We operate our Loyalty Programs as cross-brand marketing programs to participating properties. Our management and franchise agreements require that properties reimburse us for a portion of the costs of operating the Loyalty Programs, including costs for marketing, promotion, communication with, and performing member services for Loyalty Program members, with no added mark-up. We receive contributions on a monthly basis from managed, franchised, owned, and leased hotels based on a portion of qualified spend by Loyalty Program members. We recognize these contributions into revenue as the points are redeemed and we provide the related service. The amount of revenue we recognize upon point redemption is impacted by our estimate of the “breakage” for points that members will never redeem. We estimate such amounts based on our historical experience and expectations of future member behavior. We recognize revenue net of the redemption cost within our “ Cost reimbursement revenue ” caption on our Income Statements, as our performance obligation is to facilitate the transaction between the Loyalty Program member and the managed or franchised property or program partner. We recognize all other Loyalty Program costs as incurred in our “Reimbursed expenses” caption. We have multi-year agreements for our co-brand credit cards associated with our Loyalty Programs. Under these agreements, we have performance obligations to provide a license to the intellectual property associated with our brands and marketing lists (“Licensed IP”) to the financial institution that issues the credit cards, to arrange for the redemption of Loyalty Program points as discussed in the preceding paragraph, and to provide free night certificates to cardholders. We receive fees from these agreements, including fixed amounts that are primarily payable at contract inception, and variable amounts that are paid to us monthly over the term of the agreements, based on: (1) the number of free night certificates issued and redeemed; (2) the number of Loyalty Program points purchased; and (3) the volume of cardholder spend. We allocate those fees among the performance obligations, including the Licensed IP, our Loyalty Program points, and free night certificates provided to cardholders based on their estimated standalone selling prices. The estimation of the standalone selling prices requires significant judgments based upon generally accepted valuation methodologies regarding the value of our Licensed IP, the amount of funding we will receive, and the number of Loyalty Program points and free night certificates we will issue over the term of the agreements. We base our estimates of these amounts on our historical experience and expectation of future cardholder behavior. We recognize the portion of the Licensed IP revenue that meets the sales-based royalty criteria as the credit cards are used and the remaining portion of the Licensed IP revenue on a straight-line basis over the contract term. In our Income Statements, we primarily recognize Licensed IP revenue in the “Franchise fees” caption, and we recognize a portion in the “Cost reimbursement revenue” caption. We recognize the revenue related to the Loyalty Program points as discussed in the preceding paragraph. We recognize the revenue related to the free night certificates when the related service is provided. If the free night certificate redemption involves a managed or franchised property, we recognize revenue net of the redemption cost, as our performance obligation is to facilitate the transaction between the Loyalty Program member and the managed or franchised property. Contract Balances We generally receive payments from customers as we satisfy our performance obligations. We record a receivable when we have an unconditional right to receive payment and only the passage of time is required before payment is due. We record deferred revenue when we receive payment, or have the unconditional right to receive payment, in advance of the satisfaction of our performance obligations related to franchise application and relicensing fees, Global Design fees, credit card branding license fees, and our Loyalty Programs. Current and noncurrent deferred revenue increased by $85 million , from $685 million at December 31, 2017 to $770 million at March 31, 2018 , primarily as a result of our revenue recognition activity described above in the “Performance Obligations” caption. The increase was primarily attributed to a $96 million increase related to our credit card branding licenses and a $9 million increase related to franchise application and relicensing fees, partially offset by an $8 million decrease related to Global Design activity. Our current and noncurrent Loyalty Program liability increased by $327 million , from $4,940 million at December 31, 2017 to $5,267 million at March 31, 2018 , primarily reflecting an increase in points earned and consideration from our credit card agreements, partially offset by revenue recognized of $425 million that we had deferred at December 31, 2017 . Costs incurred to obtain and fulfill contracts with customers We incur certain costs to obtain and fulfill contracts with customers, which we capitalize and amortize on a straight-line basis over the initial, non-cancellable term of the contract. We classify incremental costs of obtaining a contract with a customer in the “ Contract acquisition costs and other ” caption of our Balance Sheets, the related amortization in the “ Contract investment amortization ” caption of our Income Statements, and the cash flow impact in the “ Contract acquisition costs ” caption of our Statements of Cash Flows. We classify certain direct costs to fulfill a contract with a customer in the “ Other noncurrent assets ” caption of our Balance Sheets, and the related amortization in the “ Owned, leased, and other-direct ” caption of our Income Statements. We had capitalized costs to fulfill contracts with customers of $301 million at March 31, 2018 and $295 million at December 31, 2017 . Practical Expedients and Exemptions We do not disclose the amount of variable consideration that we expect to recognize in future periods in the following circumstances: (1) if we recognize the revenue based on the amount invoiced or services performed; (2) for sales-based or usage-based royalty promised in exchange for a license of intellectual property; or (3) if the consideration is allocated entirely to a wholly unsatisfied promise to transfer a distinct service that forms part of a single performance obligation, and the terms of the consideration relate specifically to our efforts to transfer, or to a specific outcome from transferring the service. We are required to collect certain taxes and fees from customers on behalf of governmental agencies and remit these back to the applicable governmental agencies on a periodic basis. We do not include these taxes in determining the transaction price.

Dispositions

Dispositions	3 Months Ended
	Mar. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Dispositions	DISPOSITIONS In the 2018 first quarter, we sold The Sheraton Buenos Aires Hotel & Convention Center and Park Tower, A Luxury Collection Hotel, Buenos Aires, both Caribbean and Latin America properties, and received $100 million in cash. We recognized a $53 million gain in the “Gains and other income, net” caption of our Income Statements. Planned Dispositions At the end of the 2018 first quarter , we held $121 million of assets classified as “Assets held for sale” on our Balance Sheets related to two Asia Pacific properties, one North American Full-Service property, and the remaining Miami Beach EDITION residences.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE The table below presents the reconciliation of the earnings and number of shares used in our calculations of basic and diluted earnings per share: Three Months Ended (in millions, except per share amounts) March 31, 2018 March 31, 2017 Computation of Basic Earnings Per Share Net income $ 398 $ 371 Shares for basic earnings per share 358.4 384.9 Basic earnings per share $ 1.11 $ 0.96 Computation of Diluted Earnings Per Share Net income $ 398 $ 371 Shares for basic earnings per share 358.4 384.9 Effect of dilutive securities Share-based compensation 4.9 5.1 Shares for diluted earnings per share 363.3 390.0 Diluted earnings per share $ 1.09 $ 0.95

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION We recorded share-based compensation expense of $42 million in the 2018 first quarter and $48 million in the 2017 first quarter . Deferred compensation costs for unvested awards totaled $318 million at March 31, 2018 and $168 million at December 31, 2017 . RSUs and PSUs We granted 1.3 million RSUs during the 2018 first quarter to certain officers, key employees, and non-employee directors, and those units vest generally over four years in equal annual installments commencing one year after the grant date. We granted 0.1 million PSUs in the 2018 first quarter to certain executive officers, subject to continued employment and the satisfaction of certain performance conditions based on achievement of pre-established targets for Adjusted EBITDA, RevPAR Index, room openings, and/or net administrative expense over, or at the end of, a three -year performance period. RSUs, including PSUs, granted in the 2018 first quarter had a weighted average grant-date fair value of $133 .

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Our effective tax rate decreased to 20.8 percent for the 2018 first quarter from 25.0 percent for the 2017 first quarter , primarily due to the reduction of the U.S. federal tax rate under the Tax Cuts and Jobs Act of 2017 (the “2017 Tax Act”), the release of tax reserves due to the completion of certain examinations, increased earnings in jurisdictions with lower tax rates, increases in excess tax deductions related to the vesting and exercise of share-based awards, and a reduction of the provisional Deemed Repatriation Transition Tax (“Transition Tax”) estimate due to the impact of a 2018 first quarter audit settlement. The decrease was partially offset by tax expense incurred for uncertain tax positions relating to legacy-Starwood operations, increased state income tax due to a change in our position regarding the future remittance of a portion of the accumulated earnings of non-U.S. subsidiaries, tax expense related to the gain on the sale of two properties in the 2018 first quarter, and the current period’s provisional estimate of tax for global intangible low-taxed income (“GILTI”) under the 2017 Tax Act. We paid cash for income taxes, net of refunds, of $88 million in the 2018 first quarter and $37 million in the 2017 first quarter . Tax Cuts and Jobs Act of 2017 Although we have not completed our accounting for the effects of the 2017 Tax Act, we have where possible made reasonable estimates of the 2017 Tax Act’s effects on our existing deferred tax balances and the Transition Tax, as described below. In cases where we have not been able to make reasonable estimates of the impact of the 2017 Tax Act, as described below, we continue to account for those items based on our existing accounting under ASC 740, Income Taxes, and the provisions of the tax laws that were in effect immediately before enactment of the 2017 Tax Act. In all cases, we will continue to refine our calculations as we complete additional analyses on the application of the law. As we complete our analysis, collect and prepare necessary data, and interpret any additional regulatory guidance, we may adjust the provisional amounts that we have recorded during a measurement period of up to one year from the enactment of the 2017 Tax Act that could materially impact our provision for income taxes, which could in turn materially affect our tax obligations and effective tax rate, in the periods in which we make such adjustments. Reduction of U.S. federal corporate tax rate . The 2017 Tax Act reduced the U.S. federal corporate tax rate from 35 percent to 21 percent, effective January 1, 2018. In 2017, we made a reasonable estimate of the net impact of the corporate tax rate reduction on our deferred tax assets and liabilities, which did not change in the 2018 first quarter. However, our estimate could change as we complete our analyses of all impacts of the 2017 Tax Act, including, but not limited to, the state tax effect of adjustments made to federal temporary differences. Deemed Repatriation Transition Tax . The Transition Tax is a new one-time tax on previously untaxed earnings and profits (“E&P”) of certain of our foreign subsidiaries accumulated post-1986 through year-end 2017. In addition to U.S. federal income taxes, the deemed repatriation of such E&P may result in additional state income taxes in some of the U.S. states in which we operate. In the 2018 first quarter , we reduced our Transition Tax provisional estimate and recorded a benefit of $5 million , resulting in a net provisional estimated federal and state Transition Tax of $740 million . This adjustment resulted from changes to E&P as a result of completing an IRS audit. Our total Transition Tax estimate could continue to change as we finalize our analysis of untaxed post-1986 E&P, amounts held in cash or other specified assets, and as audits of federal income taxes are completed. The 2017 Tax Act does not provide for additional income taxes for any remaining undistributed foreign earnings not subject to the Transition Tax, or for any additional outside basis differences inherent in foreign entities, as these amounts continue to be indefinitely reinvested in those foreign operations. Substantially all our unremitted foreign earnings that have not been previously taxed have now been subjected to U.S. taxation under the Transition Tax. In the 2018 first quarter , we recorded a state tax expense of $27 million relating to our plan to remit a portion of the accumulated earnings of non-U.S. subsidiaries in the future. This estimate could change as we complete additional analyses of the impacts of the 2017 Tax Act. State net operating losses and valuation allowances . We must assess whether our state net operating loss valuation allowances are affected by various aspects of the 2017 Tax Act. As discussed above, we have recorded provisional amounts related to state income taxes for certain portions of the 2017 Tax Act, but we have not completed our analysis for the states where we have net operating loss carryovers and valuation allowances. Because we have not yet completed our determination of the need for, or any change in, any valuation allowance, we have not yet recorded any change to valuation allowances. Other provisions. The 2017 Tax Act also included a new provision designed to tax GILTI. Under GAAP, we may make an accounting policy election to either (1) treat any taxes on GILTI inclusions as a current-period expense when incurred (the “period cost method”) or (2) factor such amounts into our measurement of our deferred taxes (the “deferred method”). We have not yet adopted either accounting policy because we have not completed our analysis of this provision. We recorded a provision for GILTI tax related to current-year operations in our estimated annual effective tax rate. Because we are still evaluating the GILTI provisions and performing our analysis of future taxable income that is subject GILTI, we have not provided for additional GILTI tax on deferred items.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Guarantees We present the maximum potential amount of our future guarantee fundings and the carrying amount of our liability for our debt service, operating profit, and other guarantees for which we are the primary obligor at March 31, 2018 in the following table: ($ in millions) Guarantee Type Maximum Potential Amount of Future Fundings Recorded Liability for Guarantees Debt service $ 131 $ 76 Operating profit 232 108 Other 10 2 $ 373 $ 186 Contingent Purchase Obligations Times Square EDITION . In the 2018 second quarter, the owner of the Times Square EDITION sold the property, and the lenders terminated our contingent purchase agreement. Sheraton Grand Chicago . We granted the owner a one-time right, exercisable in 2022, to require us to purchase the leasehold interest in the land and the hotel for $300 million in cash (the “put option”). If the owner exercises the put option, we have the option to purchase, at the same time the put transaction closes, the underlying fee simple interest in the land for an additional $200 million in cash. We accounted for the put option as a guarantee, and our recorded liability at March 31, 2018 was $57 million . Other Contingencies In connection with our acquisition of Starwood and our assessment of various regulatory compliance matters at certain foreign legacy-Starwood locations, including compliance with the U.S. Foreign Corrupt Practices Act, we have determined that we do not need to establish reserves, or accrue expenses, based on the results of this assessment and the steps we have taken to integrate Starwood into Marriott’s compliance program.

Long-Term Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Long-Term Debt	LONG-TERM DEBT We provide detail on our long-term debt balances, net of discounts, premiums, and debt issuance costs, in the following table at the end of the 2018 first quarter and year-end 2017 : At Period End ($ in millions) March 31, December 31, 2017 Senior Notes: Series K Notes, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 $ 598 $ 598 Series L Notes, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 348 348 Series M Notes, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 348 348 Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 397 397 Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 448 447 Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 345 345 Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 744 744 Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 743 743 Series S Notes, interest rate of 6.8%, face amount of $324, maturing May 15, 2018 326 330 Series T Notes, interest rate of 7.2%, face amount of $181, maturing December 1, 2019 194 197 Series U Notes, interest rate of 3.1%, face amount of $291, maturing February 15, 2023 291 291 Series V Notes, interest rate of 3.8%, face amount of $318, maturing March 15, 2025 337 337 Series W Notes, interest rate of 4.5%, face amount of $278, maturing October 1, 2034 292 292 Commercial paper 2,998 2,371 Credit Facility — — Capital lease obligations 170 171 Other 267 279 $ 8,846 $ 8,238 Less: Current portion of long-term debt (988 ) (398 ) $ 7,858 $ 7,840 We paid cash for interest, net of amounts capitalized, of $51 million in the 2018 first quarter and $49 million in the 2017 first quarter . We are party to a multicurrency revolving credit agreement (the “Credit Facility”) that provides for up to $4,000 million of aggregate effective borrowings to support our commercial paper program and general corporate needs, including working capital, capital expenditures, share repurchases, letters of credit, and acquisitions. Borrowings under the Credit Facility generally bear interest at LIBOR (the London Interbank Offered Rate) plus a spread, based on our public debt rating. We also pay quarterly fees on the Credit Facility at a rate based on our public debt rating. While any outstanding commercial paper borrowings and/or borrowings under our Credit Facility generally have short-term maturities, we classify the outstanding borrowings as long-term based on our ability and intent to refinance the outstanding borrowings on a long-term basis. The Credit Facility expires on June 10, 2021. See the “ Cash Requirements and Our Credit Facility ” caption later in this report in the “Liquidity and Capital Resources” section of Item 2 below for further information on our Credit Facility and available borrowing capacity at March 31, 2018 . In the 2018 second quarter, we issued $450 million aggregate principal amount of 4.000 percent Series X Notes due April 15, 2028 (the “Series X Notes”). We will pay interest on the Series X Notes on April 15 and October 15 of each year, commencing on October 15, 2018. We received net proceeds of approximately $443 million from the offering of the Series X Notes, after deducting the underwriting discount and estimated expenses. We expect to use these proceeds for general corporate purposes, which may include working capital, capital expenditures, acquisitions, stock repurchases, or repayment of outstanding commercial paper or other borrowings.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	FAIR VALUE OF FINANCIAL INSTRUMENTS We believe that the fair values of our current assets and current liabilities approximate their reported carrying amounts. We present the carrying values and the fair values of noncurrent financial assets and liabilities that qualify as financial instruments, determined under current guidance for disclosures on the fair value of financial instruments, in the following table: March 31, 2018 December 31, 2017 ($ in millions) Carrying Amount Fair Value Carrying Amount Fair Value Senior, mezzanine, and other loans $ 147 $ 133 $ 142 $ 130 Total noncurrent financial assets $ 147 $ 133 $ 142 $ 130 Senior Notes $ (4,487 ) $ (4,404 ) $ (5,087 ) $ (5,126 ) Commercial paper (2,998 ) (2,998 ) (2,371 ) (2,371 ) Other long-term debt (209 ) (211 ) (217 ) (221 ) Other noncurrent liabilities (174 ) (174 ) (178 ) (178 ) Total noncurrent financial liabilities $ (7,868 ) $ (7,787 ) $ (7,853 ) $ (7,896 ) See the “Fair Value Measurements” caption of Footnote 2. Summary of Significant Accounting Policies of our 2017 Form 10-K for more information on the input levels we use in determining fair value.

Other Comprehensive (Loss) Inco

Other Comprehensive (Loss) Income and Shareholders' Equity	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Other Comprehensive (Loss) Income and Shareholders' Equity	OTHER COMPREHENSIVE INCOME (LOSS) AND SHAREHOLDERS’ EQUITY The following tables detail the accumulated other comprehensive income (loss) activity for the 2018 first quarter and 2017 first quarter : ($ in millions) Foreign Currency Translation Adjustments Derivative Instrument Adjustments Available-For-Sale Securities Unrealized Adjustments Pension and Postretirement Adjustments Accumulated Other Comprehensive Income (Loss) Balance at year-end 2017 $ (23 ) $ (10 ) $ 4 $ 12 $ (17 ) Other comprehensive income (loss) before reclassifications (1) 152 (3 ) — — 149 Amounts reclassified from accumulated other comprehensive income (loss) 9 4 — — 13 Net other comprehensive income (loss) 161 1 — — 162 Adoption of ASU 2016-01 — — (4 ) — (4 ) Balance at March 31, 2018 $ 138 $ (9 ) $ — $ 12 $ 141 ($ in millions) Foreign Currency Translation Adjustments Derivative Instrument Adjustments Available-For-Sale Securities Unrealized Adjustments Pension and Postretirement Adjustments Accumulated Other Comprehensive Income (Loss) Balance at year-end 2016 $ (503 ) $ (5 ) $ 6 $ 5 $ (497 ) Other comprehensive income (loss) before reclassifications (1) 188 (2 ) (1 ) — 185 Amounts reclassified from accumulated other comprehensive loss — — — — — Net other comprehensive income (loss) 188 (2 ) (1 ) — 185 Balance at March 31, 2017 $ (315 ) $ (7 ) $ 5 $ 5 $ (312 ) (1) Other comprehensive income (loss) before reclassifications for foreign currency translation adjustments includes losses on intra-entity foreign currency transactions that are of a long-term investment nature of $36 million for the 2018 first quarter and $16 million for the 2017 first quarter . The following table details the changes in common shares outstanding and shareholders’ equity for the 2018 first quarter : (in millions, except per share amounts) Common Shares Outstanding Total Class A Common Stock Additional Paid-in- Capital Retained Earnings Treasury Stock, at Cost Accumulated Other Comprehensive Loss 359.1 Balance at year-end 2017 (as previously reported) $ 3,731 $ 5 $ 5,770 $ 7,391 $ (9,418 ) $ (17 ) — Adoption of ASU 2014-09 (149 ) — — (149 ) — — 359.1 Balance at year-end 2017 (as adjusted) 3,582 5 5,770 7,242 (9,418 ) (17 ) — Adoption of ASU 2016-01 — — — 4 — (4 ) — Adoption of ASU 2016-16 372 — — 372 — — — Net income 398 — — 398 — — — Other comprehensive income 162 — — — — 162 — Dividends ($0.33 per share) (118 ) — — (118 ) — — 1.3 Share-based compensation plans (48 ) — (85 ) — 37 — (5.6 ) Purchase of treasury stock (782 ) — — — (782 ) — 354.8 Balance at March 31, 2018 $ 3,566 $ 5 $ 5,685 $ 7,898 $ (10,163 ) $ 141

Business Segments

Business Segments	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Business Segments	BUSINESS SEGMENTS We are a diversified global lodging company with operations in the following reportable business segments: • North American Full-Service , which includes our Luxury and Premium brands located in the U.S. and Canada; • North American Limited-Service , which includes our Select brands located in the U.S. and Canada; and • Asia Pacific , which includes all brand tiers in our Asia Pacific region; The following operating segments do not meet the applicable accounting criteria for separate disclosure as reportable business segments: Caribbean and Latin America, Europe, and Middle East and Africa. We present these operating segments together as “ Other International ” in the tables below. We evaluate the performance of our operating segments using “segment profits” which is based largely on the results of the segment without allocating corporate expenses, income taxes, indirect general, administrative, and other expenses, or merger-related costs and charges. We assign gains and losses, equity in earnings or losses from our joint ventures, and direct general, administrative, and other expenses to each of our segments. “Other unallocated corporate” represents a portion of our revenues, including license fees we receive from our credit card programs and fees from vacation ownership licensing agreements, general, administrative, and other expenses, merger-related costs and charges, equity in earnings or losses, and other gains or losses that we do not allocate to our segments. Beginning in the 2018 first quarter, “Other unallocated corporate” also includes revenues and expenses for our Loyalty Programs, and we reflected this change in the prior period amounts shown in the tables below. Our President and Chief Executive Officer, who is our chief operating decision maker, monitors assets for the consolidated company but does not use assets by operating segment when assessing performance or making operating segment resource allocations. Segment Revenues Three Months Ended ($ in millions) March 31, 2018 March 31, 2017 North American Full-Service $ 3,299 $ 3,240 North American Limited-Service 761 741 Asia Pacific 275 241 Other International 527 512 Total segment revenues 4,862 4,734 Other unallocated corporate 144 178 Total consolidated revenues $ 5,006 $ 4,912 Segment Profits Three Months Ended ($ in millions) March 31, 2018 March 31, 2017 North American Full-Service $ 277 $ 302 North American Limited-Service 182 187 Asia Pacific 112 94 Other International 159 118 Total segment profits 730 701 Other unallocated corporate (158 ) (144 ) Interest expense, net of interest income (70 ) (63 ) Income taxes (104 ) (123 ) Net income $ 398 $ 371

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Standards	New Accounting Standards Not Yet Adopted Accounting Standards Update (“ASU”) 2016-02 “Leases” (Topic 842). ASU 2016-02 introduces a lessee model that brings substantially all leases onto the balance sheet. Under the new standard, a lessee will recognize on its balance sheet a lease liability and a right-of-use asset for most leases, including operating leases. The new standard will also distinguish leases as either finance leases or operating leases. This distinction will affect how leases are measured and presented in the income statement and statement of cash flows. The standard is effective for us beginning in our 2019 first quarter and requires the use of a modified retrospective transition method. We are still assessing the potential impact that ASU 2016-02 will have on our financial statements and disclosures, but we expect that it will have a material effect on our Balance Sheets. New Accounting Standards Adopted ASU 2016-18 “Restricted Cash” (Topic 230). ASU 2016-18 requires companies to include restricted cash with cash and cash equivalents when reconciling beginning and ending amounts shown on the statement of cash flows. We adopted ASU 2016-18 in the 2018 first quarter using the retrospective transition method, and accordingly, we revised prior period amounts, as shown in the “ Statements of Cash Flows ” table below. ASU 2016-16 “Accounting for Income Taxes: Intra-Entity Transfers of Assets Other than Inventory” (Topic 740). ASU 2016-16 requires companies to recognize the income tax effects of intercompany sales of assets other than inventory when the transfer occurs. We adopted ASU 2016-16 in the 2018 first quarter using the modified retrospective transition method and recorded an adjustment of $372 million for the cumulative effect to retained earnings at January 1, 2018. ASU 2016-15 “Classification of Certain Cash Receipts and Cash Payments” (Topic 230). ASU 2016-15 specifies how certain cash receipts and payments are to be classified in the statement of cash flows and primarily impacts our presentation of cash outflows for commercial paper. Under ASU 2016-15, we are required to attribute a portion of the payments to accreted interest and classify that portion as cash outflows for operating activities. We adopted ASU 2016-15 in the 2018 first quarter using the retrospective transition method, and accordingly, we revised prior period amounts, as shown in the “ Statements of Cash Flows ” table below. ASU 2016-01 “Recognition and Measurement of Financial Assets and Financial Liabilities” (Topic 825). ASU 2016-01 eliminates the available-for-sale classification for equity investments and requires companies to measure equity investments at fair value and recognize any changes in the fair value in net income. We adopted ASU 2016-01 in the 2018 first quarter using the modified retrospective transition method and recorded a cumulative-effect adjustment of $4 million to retained earnings at January 1, 2018. ASU 2014-09 “Revenue from Contracts with Customers” (Topic 606). ASU 2014-09 and several related ASUs (collectively referred to as “ASU 2014-09”) supersede the revenue recognition requirements in Topic 605, Revenue Recognition , as well as most industry-specific guidance, and provide a principles-based, comprehensive framework in Topic 606, Revenue Recognition. ASU 2014-09 also specifies the accounting for certain costs to obtain or fulfill a contract with a customer and provides enhanced disclosure requirements. We adopted ASU 2014-09 in the 2018 first quarter using the full retrospective transition method. See Footnote 2. Revenues for disclosures required by ASU 2014-09, including our revenue recognition accounting policies. When we adopted ASU 2014-09, we applied the following expedients and exemptions, which are allowed by the standard, to our prior period Financial Statements and disclosures: • We used the transaction price at the date of contract completion for our contracts that had variable consideration and were completed before January 1, 2018. • We considered the aggregate effect of all contract modifications that occurred before January 1, 2016 when: (1) identifying satisfied and unsatisfied performance obligations; (2) determining the transaction price; and (3) allocating the transaction price to the satisfied and unsatisfied performance obligations. • We did not: (1) disclose the amount of the transaction price that we allocated to remaining performance obligations; or (2) include an explanation of when we expect to recognize the revenue allocated to remaining performance obligations. The cumulative effect of adopting ASU 2014-09 was a decrease in 2016 retained earnings of approximately $264 million .
Performance Obligations	Performance Obligations For our managed hotels, we have performance obligations to provide hotel management services and a license to our hotel system intellectual property for the use of our brand names. As compensation for such services, we are generally entitled to receive base fees, which are a percentage of the revenues of hotels, and incentives fees, which are generally based on a measure of hotel profitability. Both the base and incentive management fees are variable consideration, as the transaction price is based on a percentage of revenue or profit, as defined in each contract. We recognize base management fees on a monthly basis over the term of the agreement as those amounts become payable. We recognize incentive management fees on a monthly basis over the term of the agreement based on each property's financial results, as long as we do not expect a significant reversal due to projected future hotel performance or cash flows in future periods. For our franchised hotels, we have a performance obligation to provide franchisees and operators a license to our hotel system intellectual property for use of certain of our brand names. As compensation for such services, we are typically entitled to initial application fees and ongoing royalty fees. Our ongoing royalty fees represent variable consideration, as the transaction price is based on a percentage of certain revenues of the hotels, as defined in each contract. We recognize royalty fees on a monthly basis over the term of the agreement as those amounts become payable. Initial application and relicensing fees are fixed consideration payable upon submission of a franchise application or renewal and are recognized on a straight-line basis over the initial or renewal term of the franchise agreements. Under our management and franchise agreements, we are entitled to be reimbursed for certain costs we incur on behalf of the managed, franchised, and licensed properties, with no added mark-up. These costs primarily consist of payroll and related expenses at managed properties where we are the employer of the employees at the properties, and include certain operational and administrative costs as provided for in our contracts with the owners. We are entitled to reimbursement in the period we incur the related reimbursable costs, which we recognize within the “ Cost reimbursement revenue ” caption of our Income Statements. Under our management and franchise agreements, hotel owners and franchisees participate in certain centralized programs and services, such as marketing, sales, reservations, and insurance programs. We operate these programs and services for the benefit of our hotel owners. We do not operate these programs and services to generate a profit over the contract term, and accordingly, when we recover the costs that we incur for these programs and services from our hotel owners, we do not seek a mark-up. The amounts we charge for these programs and services are generally based on sales or other variable metrics and are payable on a monthly basis. We recognize revenue within the “ Cost reimbursement revenue ” caption of our Income Statements when the amounts may be billed to hotel owners, and we recognize expenses within the “Reimbursed expenses” caption as they are incurred. This pattern of recognition results in temporary timing differences between the costs incurred for centralized programs and services and the related reimbursement from hotel owners in our operating and net income. Over the long term, these programs and services are not designed to impact our economics, either positively or negatively. In addition, proceeds from the sale of our interest in Avendra that we expend for the benefit of our hotel owners are included in “Reimbursed expenses”. We provide hotel design and construction review quality assurance (“Global Design”) services to our managed and franchised hotel owners, generally during the period prior to a hotel’s opening or during the period a hotel is converting to a Marriott brand (the “pre-opening period”). As compensation for such services, we may be entitled to receive a one-time fixed fee that is payable during the pre-opening period of the hotel. As these services are not a distinct performance obligation, we recognize the fees on a straight-line basis over the initial term of the management or franchise agreement within the “ Owned, leased, and other revenue ” caption of our Income Statements. At our owned and leased hotels, we have performance obligations to provide accommodations and other ancillary services to hotel guests. As compensation for such goods and services, we are typically entitled to a fixed nightly fee for an agreed upon period and additional fixed fees for any ancillary services purchased. These fees are generally payable at the time the hotel guest checks out of the hotel. We generally satisfy the performance obligations over time, and we recognize the revenue from room sales and from other ancillary guest services on a daily basis, as the rooms are occupied and we have rendered the services. Under our Loyalty Programs, we have a performance obligation to provide or arrange for the provision of goods or services for free or at a discount to Loyalty Program members in exchange for the redemption of points earned from past activities. We operate our Loyalty Programs as cross-brand marketing programs to participating properties. Our management and franchise agreements require that properties reimburse us for a portion of the costs of operating the Loyalty Programs, including costs for marketing, promotion, communication with, and performing member services for Loyalty Program members, with no added mark-up. We receive contributions on a monthly basis from managed, franchised, owned, and leased hotels based on a portion of qualified spend by Loyalty Program members. We recognize these contributions into revenue as the points are redeemed and we provide the related service. The amount of revenue we recognize upon point redemption is impacted by our estimate of the “breakage” for points that members will never redeem. We estimate such amounts based on our historical experience and expectations of future member behavior. We recognize revenue net of the redemption cost within our “ Cost reimbursement revenue ” caption on our Income Statements, as our performance obligation is to facilitate the transaction between the Loyalty Program member and the managed or franchised property or program partner. We recognize all other Loyalty Program costs as incurred in our “Reimbursed expenses” caption. We have multi-year agreements for our co-brand credit cards associated with our Loyalty Programs. Under these agreements, we have performance obligations to provide a license to the intellectual property associated with our brands and marketing lists (“Licensed IP”) to the financial institution that issues the credit cards, to arrange for the redemption of Loyalty Program points as discussed in the preceding paragraph, and to provide free night certificates to cardholders. We receive fees from these agreements, including fixed amounts that are primarily payable at contract inception, and variable amounts that are paid to us monthly over the term of the agreements, based on: (1) the number of free night certificates issued and redeemed; (2) the number of Loyalty Program points purchased; and (3) the volume of cardholder spend. We allocate those fees among the performance obligations, including the Licensed IP, our Loyalty Program points, and free night certificates provided to cardholders based on their estimated standalone selling prices. The estimation of the standalone selling prices requires significant judgments based upon generally accepted valuation methodologies regarding the value of our Licensed IP, the amount of funding we will receive, and the number of Loyalty Program points and free night certificates we will issue over the term of the agreements. We base our estimates of these amounts on our historical experience and expectation of future cardholder behavior. We recognize the portion of the Licensed IP revenue that meets the sales-based royalty criteria as the credit cards are used and the remaining portion of the Licensed IP revenue on a straight-line basis over the contract term. In our Income Statements, we primarily recognize Licensed IP revenue in the “Franchise fees” caption, and we recognize a portion in the “Cost reimbursement revenue” caption. We recognize the revenue related to the Loyalty Program points as discussed in the preceding paragraph. We recognize the revenue related to the free night certificates when the related service is provided. If the free night certificate redemption involves a managed or franchised property, we recognize revenue net of the redemption cost, as our performance obligation is to facilitate the transaction between the Loyalty Program member and the managed or franchised property. Contract Balances We generally receive payments from customers as we satisfy our performance obligations. We record a receivab

Basis of Presentation (Tables)

Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Effects of Adoption of ASU 2014 on Financial Statements	The following tables present the effect of the adoption of ASUs 2014-09, 2016-15, and 2016-18 on our Financial Statements included in this report. Income Statements Three Months Ended Three Months Ended ($ in millions, except per share amounts) March 31, 2017 (As Previously Reported) Adoption of ASU 2014-09 March 31, 2017 (As Adjusted) REVENUES Base management fees $ 264 $ — $ 264 Franchise fees 365 (10 ) 355 Incentive management fees 153 (13 ) 140 Gross fee revenues 782 (23 ) 759 Contract investment amortization — (11 ) (11 ) Net fee revenues 782 (34 ) 748 Owned, leased, and other revenue 439 (11 ) 428 Cost reimbursement revenue 4,340 (604 ) 3,736 5,561 (649 ) 4,912 OPERATING COSTS AND EXPENSES Owned, leased, and other-direct 358 (2 ) 356 Depreciation, amortization, and other 65 (14 ) 51 General, administrative, and other 210 2 212 Merger-related costs and charges 51 — 51 Reimbursed expenses 4,340 (644 ) 3,696 5,024 (658 ) 4,366 OPERATING INCOME 537 9 546 Gains and other income, net — — — Interest expense (70 ) — (70 ) Interest income 7 — 7 Equity in earnings 11 — 11 INCOME BEFORE INCOME TAXES 485 9 494 Provision for income taxes (120 ) (3 ) (123 ) NET INCOME $ 365 $ 6 $ 371 EARNINGS PER SHARE Earnings per share - basic $ 0.95 $ 0.01 $ 0.96 Earnings per share - diluted $ 0.94 $ 0.01 $ 0.95 Statements of Comprehensive Income Three Months Ended Three Months Ended ($ in millions) March 31, 2017 (As Previously Reported) Adoption of ASU 2014-09 March 31, 2017 (As Adjusted) Net income $ 365 $ 6 $ 371 Other comprehensive income (loss): Foreign currency translation adjustments 188 — 188 Derivative instrument adjustments, net of tax (2 ) — (2 ) Unrealized (loss) gain on available-for-sale securities, net of tax (1 ) — (1 ) Pension and postretirement adjustments, net of tax — — — Reclassification of losses, net of tax — — — Total other comprehensive income, net of tax 185 — 185 Comprehensive income $ 550 $ 6 $ 556 Balance Sheets ($ in millions) December 31, 2017 (As Previously Reported) (1) Adoption of ASU 2014-09 December 31, 2017 (As Adjusted) ASSETS Current assets Cash and equivalents $ 383 $ — $ 383 Accounts and notes receivable, net 1,999 (26 ) 1,973 Prepaid expenses and other 216 19 235 Assets held for sale 149 — 149 2,747 (7 ) 2,740 Property and equipment, net 1,793 — 1,793 Intangible assets Brands 5,922 — 5,922 Contract acquisition costs and other 2,884 (262 ) 2,622 Goodwill 9,207 — 9,207 18,013 (262 ) 17,751 Equity method investments 735 (1 ) 734 Notes receivable, net 142 — 142 Deferred tax assets 93 — 93 Other noncurrent assets 426 167 593 $ 23,949 $ (103 ) $ 23,846 LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT) Current liabilities Current portion of long-term debt $ 398 $ — $ 398 Accounts payable 783 — 783 Accrued payroll and benefits 1,214 — 1,214 Liability for guest loyalty programs 2,064 57 2,121 Accrued expenses and other 1,541 (250 ) 1,291 6,000 (193 ) 5,807 Long-term debt 7,840 — 7,840 Liability for guest loyalty programs 2,876 (57 ) 2,819 Deferred tax liabilities 604 1 605 Deferred revenue 145 438 583 Other noncurrent liabilities 2,753 (143 ) 2,610 Shareholders' equity Class A Common Stock 5 — 5 Additional paid-in-capital 5,770 — 5,770 Retained earnings 7,391 (149 ) 7,242 Treasury stock, at cost (9,418 ) — (9,418 ) Accumulated other comprehensive loss (17 ) — (17 ) 3,731 (149 ) 3,582 $ 23,949 $ (103 ) $ 23,846 (1) Includes reclassifications among various captions, including Deferred revenue and Other noncurrent liabilities, to conform to current period presentation. Statements of Cash Flows Three Months Ended Three Months Ended ($ in millions) March 31, 2017 (As Previously Reported) Adoption of ASU 2014-09 Adoption of ASUs 2016-18 and 2016-15 March 31, 2017 (As Adjusted) OPERATING ACTIVITIES Net income $ 365 $ 6 $ — $ 371 Adjustments to reconcile to cash provided by operating activities: Depreciation, amortization, and other 65 (3 ) — 62 Share-based compensation 48 — — 48 Income taxes 82 4 — 86 Liability for guest loyalty program 60 9 — 69 Contract acquisition costs — (53 ) — (53 ) Merger-related charges (36 ) — — (36 ) Working capital changes (108 ) (28 ) 1 (135 ) (Gain) loss on asset dispositions 1 — — 1 Other 49 7 (7 ) 49 Net cash provided by (used in) operating activities 526 (58 ) (6 ) 462 INVESTING ACTIVITIES Capital expenditures (48 ) — — (48 ) Dispositions 311 — — 311 Loan advances (28 ) — — (28 ) Loan collections 7 — — 7 Contract acquisition costs (54 ) 54 — — Other (4 ) 4 1 1 Net cash provided by investing activities 184 58 1 243 FINANCING ACTIVITIES Commercial paper/Credit Facility, net (33 ) — 7 (26 ) Issuance of long-term debt 1 — — 1 Repayment of long-term debt (4 ) — — (4 ) Issuance of Class A Common Stock 2 — — 2 Dividends paid (115 ) — — (115 ) Purchase of treasury stock (582 ) — — (582 ) Share-based compensation withholding taxes (99 ) — — (99 ) Net cash provided by (used in) financing activities (830 ) — 7 (823 ) (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH (120 ) — 2 (118 ) CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, beginning of period 858 — 29 887 CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, end of period $ 738 $ — $ 31 $ 769 See Footnote 10. Other Comprehensive Income (Loss) and Shareholders’ Equity for the impact of the adoption of new accounting standards on our shareholders’ equity.

Revenues (Tables)

Revenues (Tables)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following tables present our revenues disaggregated by major revenue stream for the 2018 first quarter and the 2017 first quarter . Three Months Ended March 31, 2018 ($ in millions) North American Full Service North American Limited Service Asia Pacific Other International Total Gross fee revenues $ 299 $ 196 $ 117 $ 122 $ 734 Contract investment amortization (11 ) (3 ) — (4 ) (18 ) Net fee revenues 288 193 117 118 716 Owned, leased, and other revenue 155 33 47 158 393 Cost reimbursement revenue 2,856 535 111 251 3,753 Total segment revenue $ 3,299 $ 761 $ 275 $ 527 $ 4,862 Unallocated corporate 144 Total revenue $ 5,006 Three Months Ended March 31, 2017 ($ in millions) North American Full Service North American Limited Service Asia Pacific Other International Total Gross fee revenues $ 289 $ 181 $ 97 $ 112 $ 679 Contract investment amortization (6 ) (3 ) — (2 ) (11 ) Net fee revenues 283 178 97 110 668 Owned, leased, and other revenue 197 31 41 149 418 Cost reimbursement revenue 2,760 532 103 253 3,648 Total segment revenue $ 3,240 $ 741 $ 241 $ 512 $ 4,734 Unallocated corporate 178 Total revenue $ 4,912

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Reconciliation of the Earnings and Number of Shares Used in Calculations of Basic and Diluted Earnings Per Share	The table below presents the reconciliation of the earnings and number of shares used in our calculations of basic and diluted earnings per share: Three Months Ended (in millions, except per share amounts) March 31, 2018 March 31, 2017 Computation of Basic Earnings Per Share Net income $ 398 $ 371 Shares for basic earnings per share 358.4 384.9 Basic earnings per share $ 1.11 $ 0.96 Computation of Diluted Earnings Per Share Net income $ 398 $ 371 Shares for basic earnings per share 358.4 384.9 Effect of dilutive securities Share-based compensation 4.9 5.1 Shares for diluted earnings per share 363.3 390.0 Diluted earnings per share $ 1.09 $ 0.95

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Maximum Potential Amount of Future Fundings as the Primary Obligor for Guarantees and the Liability for Expected Future Fundings	We present the maximum potential amount of our future guarantee fundings and the carrying amount of our liability for our debt service, operating profit, and other guarantees for which we are the primary obligor at March 31, 2018 in the following table: ($ in millions) Guarantee Type Maximum Potential Amount of Future Fundings Recorded Liability for Guarantees Debt service $ 131 $ 76 Operating profit 232 108 Other 10 2 $ 373 $ 186

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Long-Term Debt	We provide detail on our long-term debt balances, net of discounts, premiums, and debt issuance costs, in the following table at the end of the 2018 first quarter and year-end 2017 : At Period End ($ in millions) March 31, December 31, 2017 Senior Notes: Series K Notes, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 $ 598 $ 598 Series L Notes, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 348 348 Series M Notes, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 348 348 Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 397 397 Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 448 447 Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 345 345 Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 744 744 Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 743 743 Series S Notes, interest rate of 6.8%, face amount of $324, maturing May 15, 2018 326 330 Series T Notes, interest rate of 7.2%, face amount of $181, maturing December 1, 2019 194 197 Series U Notes, interest rate of 3.1%, face amount of $291, maturing February 15, 2023 291 291 Series V Notes, interest rate of 3.8%, face amount of $318, maturing March 15, 2025 337 337 Series W Notes, interest rate of 4.5%, face amount of $278, maturing October 1, 2034 292 292 Commercial paper 2,998 2,371 Credit Facility — — Capital lease obligations 170 171 Other 267 279 $ 8,846 $ 8,238 Less: Current portion of long-term debt (988 ) (398 ) $ 7,858 $ 7,840

Fair Value of Financial Instr23

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities	We present the carrying values and the fair values of noncurrent financial assets and liabilities that qualify as financial instruments, determined under current guidance for disclosures on the fair value of financial instruments, in the following table: March 31, 2018 December 31, 2017 ($ in millions) Carrying Amount Fair Value Carrying Amount Fair Value Senior, mezzanine, and other loans $ 147 $ 133 $ 142 $ 130 Total noncurrent financial assets $ 147 $ 133 $ 142 $ 130 Senior Notes $ (4,487 ) $ (4,404 ) $ (5,087 ) $ (5,126 ) Commercial paper (2,998 ) (2,998 ) (2,371 ) (2,371 ) Other long-term debt (209 ) (211 ) (217 ) (221 ) Other noncurrent liabilities (174 ) (174 ) (178 ) (178 ) Total noncurrent financial liabilities $ (7,868 ) $ (7,787 ) $ (7,853 ) $ (7,896 )

Other Comprehensive (Loss) In24

Other Comprehensive (Loss) Income and Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Accumulated Other Comprehensive (Loss) Income Activity	The following tables detail the accumulated other comprehensive income (loss) activity for the 2018 first quarter and 2017 first quarter : ($ in millions) Foreign Currency Translation Adjustments Derivative Instrument Adjustments Available-For-Sale Securities Unrealized Adjustments Pension and Postretirement Adjustments Accumulated Other Comprehensive Income (Loss) Balance at year-end 2017 $ (23 ) $ (10 ) $ 4 $ 12 $ (17 ) Other comprehensive income (loss) before reclassifications (1) 152 (3 ) — — 149 Amounts reclassified from accumulated other comprehensive income (loss) 9 4 — — 13 Net other comprehensive income (loss) 161 1 — — 162 Adoption of ASU 2016-01 — — (4 ) — (4 ) Balance at March 31, 2018 $ 138 $ (9 ) $ — $ 12 $ 141 ($ in millions) Foreign Currency Translation Adjustments Derivative Instrument Adjustments Available-For-Sale Securities Unrealized Adjustments Pension and Postretirement Adjustments Accumulated Other Comprehensive Income (Loss) Balance at year-end 2016 $ (503 ) $ (5 ) $ 6 $ 5 $ (497 ) Other comprehensive income (loss) before reclassifications (1) 188 (2 ) (1 ) — 185 Amounts reclassified from accumulated other comprehensive loss — — — — — Net other comprehensive income (loss) 188 (2 ) (1 ) — 185 Balance at March 31, 2017 $ (315 ) $ (7 ) $ 5 $ 5 $ (312 ) (1) Other comprehensive income (loss) before reclassifications for foreign currency translation adjustments includes losses on intra-entity foreign currency transactions that are of a long-term investment nature of $36 million for the 2018 first quarter and $16 million for the 2017 first quarter .
Changes in Shareholders' Equity (Deficit)	The following table details the changes in common shares outstanding and shareholders’ equity for the 2018 first quarter : (in millions, except per share amounts) Common Shares Outstanding Total Class A Common Stock Additional Paid-in- Capital Retained Earnings Treasury Stock, at Cost Accumulated Other Comprehensive Loss 359.1 Balance at year-end 2017 (as previously reported) $ 3,731 $ 5 $ 5,770 $ 7,391 $ (9,418 ) $ (17 ) — Adoption of ASU 2014-09 (149 ) — — (149 ) — — 359.1 Balance at year-end 2017 (as adjusted) 3,582 5 5,770 7,242 (9,418 ) (17 ) — Adoption of ASU 2016-01 — — — 4 — (4 ) — Adoption of ASU 2016-16 372 — — 372 — — — Net income 398 — — 398 — — — Other comprehensive income 162 — — — — 162 — Dividends ($0.33 per share) (118 ) — — (118 ) — — 1.3 Share-based compensation plans (48 ) — (85 ) — 37 — (5.6 ) Purchase of treasury stock (782 ) — — — (782 ) — 354.8 Balance at March 31, 2018 $ 3,566 $ 5 $ 5,685 $ 7,898 $ (10,163 ) $ 141

Business Segments (Tables)

Business Segments (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Segment Revenues	Segment Revenues Three Months Ended ($ in millions) March 31, 2018 March 31, 2017 North American Full-Service $ 3,299 $ 3,240 North American Limited-Service 761 741 Asia Pacific 275 241 Other International 527 512 Total segment revenues 4,862 4,734 Other unallocated corporate 144 178 Total consolidated revenues $ 5,006 $ 4,912
Segment Profits	Segment Profits Three Months Ended ($ in millions) March 31, 2018 March 31, 2017 North American Full-Service $ 277 $ 302 North American Limited-Service 182 187 Asia Pacific 112 94 Other International 159 118 Total segment profits 730 701 Other unallocated corporate (158 ) (144 ) Interest expense, net of interest income (70 ) (63 ) Income taxes (104 ) (123 ) Net income $ 398 $ 371

Basis of Presentation - Narrati

Basis of Presentation - Narrative (Details) - USD ($) $ in Millions	Jan. 01, 2018	Dec. 31, 2017	Jan. 01, 2016
Adoption of ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment of accounting principle		$ (149)
Retained Earnings | Adoption of ASU 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment of accounting principle	$ 372
Retained Earnings | Adoption of ASU 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment of accounting principle	$ 4
Retained Earnings | Adoption of ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment of accounting principle		$ (149)	$ 264

Basis of Presentation - Effect

Basis of Presentation - Effect of Adoption of ASU 2014-09 on Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
REVENUES
Base management fees	$ 273	$ 264
Franchise fees	417	355
Incentive management fees	155	140
Gross fee revenues	845	759
Contract investment amortization	(18)	(11)
Net fee revenues	827	748
Owned, leased, and other revenue	406	428
Cost reimbursement revenue	3,773	3,736
Revenues	5,006	4,912
OPERATING COSTS AND EXPENSES
Owned, leased, and other-direct	336	356
Depreciation, amortization, and other	54	51
General, administrative, and other	247	212
Merger-related costs and charges	34	51
Reimbursed expenses	3,835	3,696
Costs and expenses	4,506	4,366
OPERATING INCOME	500	546
Gains and other income, net	59	0
Interest expense	(75)	(70)
Interest income	5	7
Equity in earnings	13	11
INCOME BEFORE INCOME TAXES	502	494
Income taxes	(104)	(123)
NET INCOME	$ 398	$ 371
EARNINGS PER SHARE
Earnings per share - basic (in USD per share)	$ 1.11	$ 0.96
Earnings per share - diluted (in USD per share)	$ 1.09	$ 0.95
As Previously Reported
REVENUES
Base management fees		$ 264
Franchise fees		365
Incentive management fees		153
Gross fee revenues		782
Contract investment amortization		0
Net fee revenues		782
Owned, leased, and other revenue		439
Cost reimbursement revenue		4,340
Revenues		5,561
OPERATING COSTS AND EXPENSES
Owned, leased, and other-direct		358
Depreciation, amortization, and other		65
General, administrative, and other		210
Merger-related costs and charges		51
Reimbursed expenses		4,340
Costs and expenses		5,024
OPERATING INCOME		537
Gains and other income, net		0
Interest expense		(70)
Interest income		7
Equity in earnings		11
INCOME BEFORE INCOME TAXES		485
Income taxes		(120)
NET INCOME		$ 365
EARNINGS PER SHARE
Earnings per share - basic (in USD per share)		$ 0.95
Earnings per share - diluted (in USD per share)		$ 0.94
Adoption of ASU 2014-09 | Adjustment
REVENUES
Base management fees		$ 0
Franchise fees		(10)
Incentive management fees		(13)
Gross fee revenues		(23)
Contract investment amortization		(11)
Net fee revenues		(34)
Owned, leased, and other revenue		(11)
Cost reimbursement revenue		(604)
Revenues		(649)
OPERATING COSTS AND EXPENSES
Owned, leased, and other-direct		(2)
Depreciation, amortization, and other		(14)
General, administrative, and other		2
Merger-related costs and charges		0
Reimbursed expenses		(644)
Costs and expenses		(658)
OPERATING INCOME		9
Gains and other income, net		0
Interest expense		0
Interest income		0
Equity in earnings		0
INCOME BEFORE INCOME TAXES		9
Income taxes		(3)
NET INCOME		$ 6
EARNINGS PER SHARE
Earnings per share - basic (in USD per share)		$ 0.01
Earnings per share - diluted (in USD per share)		$ 0.01

Basis of Presentation - Effec28

Basis of Presentation - Effect of Adoption of ASU 2014-09 on Statement of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	$ 398	$ 371
Other comprehensive income (loss):
Foreign currency translation adjustments	152	188
Derivative instrument adjustments, net of tax	(3)	(2)
Unrealized gain (loss) on available-for-sale securities, net of tax	0	(1)
Pension and postretirement adjustments, net of tax	0	0
Reclassification of losses (gains), net of tax	13	0
Net other comprehensive income (loss)	162	185
Comprehensive income	$ 560	556
As Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income		365
Other comprehensive income (loss):
Foreign currency translation adjustments		188
Derivative instrument adjustments, net of tax		(2)
Unrealized gain (loss) on available-for-sale securities, net of tax		(1)
Pension and postretirement adjustments, net of tax		0
Reclassification of losses (gains), net of tax		0
Net other comprehensive income (loss)		185
Comprehensive income		550
Adoption of ASU 2014-09 | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income		6
Other comprehensive income (loss):
Foreign currency translation adjustments		0
Derivative instrument adjustments, net of tax		0
Unrealized gain (loss) on available-for-sale securities, net of tax		0
Pension and postretirement adjustments, net of tax		0
Reclassification of losses (gains), net of tax		0
Net other comprehensive income (loss)		0
Comprehensive income		$ 6

Basis of Presentation - Effec29

Basis of Presentation - Effect of Adoption of ASU 2014-09 on Balance Sheets (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and equivalents	$ 701	$ 383
Accounts and notes receivable, net	2,098	1,973
Prepaid expenses and other	232	235
Assets held for sale	121	149
Assets, current, total	3,152	2,740
Property and equipment, net	1,791	1,793
Intangible assets
Goodwill	9,270	9,207
Goodwill and intangible assets, net, total	17,864	17,751
Equity method investments	754	734
Notes receivable, net	147	142
Deferred tax assets	172	93
Other noncurrent assets	604	593
Total assets	24,484	23,846
Current liabilities
Current portion of long-term debt	988	398
Accounts payable	766	783
Accrued payroll and benefits	1,163	1,214
Liability for guest loyalty programs	2,238	2,121
Accrued expenses and other	1,314	1,291
Liabilities, current, total	6,469	5,807
Long-term debt	7,858	7,840
Liability for guest loyalty programs	3,029	2,819
Deferred tax liabilities	634	605
Deferred revenue	645	583
Other noncurrent liabilities	2,283	2,610
Shareholders’ equity
Class A Common Stock	5	5
Additional paid-in-capital	5,685	5,770
Retained earnings	7,898	7,242
Treasury stock, at cost	(10,163)	(9,418)
Accumulated other comprehensive income (loss)	141	(17)
Stockholders' equity (deficit) attributable to parent	3,566	3,582
Liabilities and equity (deficit), total	24,484	23,846
Brands
Intangible assets
Intangible assets	5,972	5,922
Contract acquisition costs and other
Intangible assets
Intangible assets	$ 2,622	2,622
As Previously Reported
Current assets
Cash and equivalents		383
Accounts and notes receivable, net		1,999
Prepaid expenses and other		216
Assets held for sale		149
Assets, current, total		2,747
Property and equipment, net		1,793
Intangible assets
Goodwill		9,207
Goodwill and intangible assets, net, total		18,013
Equity method investments		735
Notes receivable, net		142
Deferred tax assets		93
Other noncurrent assets		426
Total assets		23,949
Current liabilities
Current portion of long-term debt		398
Accounts payable		783
Accrued payroll and benefits		1,214
Liability for guest loyalty programs		2,064
Accrued expenses and other		1,541
Liabilities, current, total		6,000
Long-term debt		7,840
Liability for guest loyalty programs		2,876
Deferred tax liabilities		604
Deferred revenue		145
Other noncurrent liabilities		2,753
Shareholders’ equity
Class A Common Stock		5
Additional paid-in-capital		5,770
Retained earnings		7,391
Treasury stock, at cost		(9,418)
Accumulated other comprehensive income (loss)		(17)
Stockholders' equity (deficit) attributable to parent		3,731
Liabilities and equity (deficit), total		23,949
As Previously Reported | Brands
Intangible assets
Intangible assets		5,922
As Previously Reported | Contract acquisition costs and other
Intangible assets
Intangible assets		2,884
Adoption of ASU 2014-09 | Adjustment
Current assets
Cash and equivalents		0
Accounts and notes receivable, net		(26)
Prepaid expenses and other		19
Assets held for sale		0
Assets, current, total		(7)
Property and equipment, net		0
Intangible assets
Goodwill		0
Goodwill and intangible assets, net, total		(262)
Equity method investments		(1)
Notes receivable, net		0
Deferred tax assets		0
Other noncurrent assets		167
Total assets		(103)
Current liabilities
Current portion of long-term debt		0
Accounts payable		0
Accrued payroll and benefits		0
Liability for guest loyalty programs		57
Accrued expenses and other		(250)
Liabilities, current, total		(193)
Long-term debt		0
Liability for guest loyalty programs		(57)
Deferred tax liabilities		1
Deferred revenue		438
Other noncurrent liabilities		(143)
Shareholders’ equity
Class A Common Stock		0
Additional paid-in-capital		0
Retained earnings		(149)
Treasury stock, at cost		0
Accumulated other comprehensive income (loss)		0
Stockholders' equity (deficit) attributable to parent		(149)
Liabilities and equity (deficit), total		(103)
Adoption of ASU 2014-09 | Adjustment | Brands
Intangible assets
Intangible assets		0
Adoption of ASU 2014-09 | Adjustment | Contract acquisition costs and other
Intangible assets
Intangible assets		$ (262)

Basis of Presentation - Effec30

Basis of Presentation - Effect of Adoption of ASU 2014-09 on Statement of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES
Net income	$ 398	$ 371
Adjustments to reconcile to cash provided by operating activities:
Depreciation, amortization, and other	73	62
Share-based compensation	42	48
Income taxes	16	86
Liability for guest loyalty programs	325	69
Contract acquisition costs	(29)	(53)
Merger-related charges	(16)	(36)
Working capital changes	(185)	(135)
(Gain) loss on asset dispositions	(60)	1
Other	111	49
Net cash provided by (used in) operating activities	675	462
INVESTING ACTIVITIES
Capital expenditures	(64)	(48)
Dispositions	108	311
Loan advances	(12)	(28)
Loan collections	5	7
Contract acquisition costs		0
Other	12	1
Net cash provided by investing activities	49	243
FINANCING ACTIVITIES
Commercial paper/Credit facility, net	627	(26)
Issuance of long-term debt	0	1
Repayment of long-term debt	(13)	(4)
Issuance of Class A Common Stock	4	2
Dividends paid	(118)	(115)
Purchase of treasury stock	(815)	(582)
Share-based compensation withholding taxes	(95)	(99)
Net cash provided by (used in) financing activities	(410)	(823)
INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	314	(118)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, beginning of period	429	887
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, end of period	$ 743	769
As Previously Reported
OPERATING ACTIVITIES
Net income		365
Adjustments to reconcile to cash provided by operating activities:
Depreciation, amortization, and other		65
Share-based compensation		48
Income taxes		82
Liability for guest loyalty programs		60
Contract acquisition costs		0
Merger-related charges		(36)
Working capital changes		(108)
(Gain) loss on asset dispositions		1
Other		49
Net cash provided by (used in) operating activities		526
INVESTING ACTIVITIES
Capital expenditures		(48)
Dispositions		311
Loan advances		(28)
Loan collections		7
Contract acquisition costs		(54)
Other		(4)
Net cash provided by investing activities		184
FINANCING ACTIVITIES
Commercial paper/Credit facility, net		(33)
Issuance of long-term debt		1
Repayment of long-term debt		(4)
Issuance of Class A Common Stock		2
Dividends paid		(115)
Purchase of treasury stock		(582)
Share-based compensation withholding taxes		(99)
Net cash provided by (used in) financing activities		(830)
INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH		(120)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, beginning of period		858
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, end of period		738
Adoption of ASU 2014-09 | Adjustment
OPERATING ACTIVITIES
Net income		6
Adjustments to reconcile to cash provided by operating activities:
Depreciation, amortization, and other		(3)
Share-based compensation		0
Income taxes		4
Liability for guest loyalty programs		9
Contract acquisition costs		(53)
Merger-related charges		0
Working capital changes		(28)
(Gain) loss on asset dispositions		0
Other		7
Net cash provided by (used in) operating activities		(58)
INVESTING ACTIVITIES
Capital expenditures		0
Dispositions		0
Loan advances		0
Loan collections		0
Contract acquisition costs		54
Other		4
Net cash provided by investing activities		58
FINANCING ACTIVITIES
Commercial paper/Credit facility, net		0
Issuance of long-term debt		0
Repayment of long-term debt		0
Issuance of Class A Common Stock		0
Dividends paid		0
Purchase of treasury stock		0
Share-based compensation withholding taxes		0
Net cash provided by (used in) financing activities		0
INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH		0
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, beginning of period		0
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, end of period		0
Adoption of ASUs 2016-18 and 2016-15 | Adjustment
OPERATING ACTIVITIES
Net income		0
Adjustments to reconcile to cash provided by operating activities:
Depreciation, amortization, and other		0
Share-based compensation		0
Income taxes		0
Liability for guest loyalty programs		0
Contract acquisition costs		0
Merger-related charges		0
Working capital changes		1
(Gain) loss on asset dispositions		0
Other		(7)
Net cash provided by (used in) operating activities		(6)
INVESTING ACTIVITIES
Capital expenditures		0
Dispositions		0
Loan advances		0
Loan collections		0
Contract acquisition costs		0
Other		1
Net cash provided by investing activities		1
FINANCING ACTIVITIES
Commercial paper/Credit facility, net		7
Issuance of long-term debt		0
Repayment of long-term debt		0
Issuance of Class A Common Stock		0
Dividends paid		0
Purchase of treasury stock		0
Share-based compensation withholding taxes		0
Net cash provided by (used in) financing activities		7
INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH		2
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, beginning of period		29
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, end of period		$ 31

Revenues - Disaggregation of R

Revenues - Disaggregation of Revenue Stream (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Gross fee revenues	$ 845	$ 759
Contract investment amortization	(18)	(11)
Net fee revenues	827	748
Owned, leased, and other revenue	406	428
Cost reimbursement revenue	3,773	3,736
Revenues	5,006	4,912
Segments
Disaggregation of Revenue [Line Items]
Gross fee revenues	734	679
Contract investment amortization	(18)	(11)
Net fee revenues	716	668
Owned, leased, and other revenue	393	418
Cost reimbursement revenue	3,753	3,648
Revenues	4,862	4,734
Segments | North American Full-Service
Disaggregation of Revenue [Line Items]
Gross fee revenues	299	289
Contract investment amortization	(11)	(6)
Net fee revenues	288	283
Owned, leased, and other revenue	155	197
Cost reimbursement revenue	2,856	2,760
Revenues	3,299	3,240
Segments | North American Limited-Service
Disaggregation of Revenue [Line Items]
Gross fee revenues	196	181
Contract investment amortization	(3)	(3)
Net fee revenues	193	178
Owned, leased, and other revenue	33	31
Cost reimbursement revenue	535	532
Revenues	761	741
Segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Gross fee revenues	117	97
Contract investment amortization	0	0
Net fee revenues	117	97
Owned, leased, and other revenue	47	41
Cost reimbursement revenue	111	103
Revenues	275	241
Segments | Other International
Disaggregation of Revenue [Line Items]
Gross fee revenues	122	112
Contract investment amortization	(4)	(2)
Net fee revenues	118	110
Owned, leased, and other revenue	158	149
Cost reimbursement revenue	251	253
Revenues	527	512
Unallocated corporate
Disaggregation of Revenue [Line Items]
Revenues	$ 144	$ 178

Revenues - Narrative (Details)

Revenues - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Capitalized costs	$ 301	$ 295
Credit Card Branding Agreements
Disaggregation of Revenue [Line Items]
Increase (decrease) in contract liabilities	96
Franchise Agreements
Disaggregation of Revenue [Line Items]
Increase (decrease) in contract liabilities	9
Loyalty Programs
Disaggregation of Revenue [Line Items]
Increase (decrease) in contract liabilities	327
Contract balances	5,267	4,940
Revenue recognized	425
Global Design Activity
Disaggregation of Revenue [Line Items]
Increase (decrease) in contract liabilities	(8)
Contract Balances, Excluding Loyalty Program
Disaggregation of Revenue [Line Items]
Increase (decrease) in contract liabilities	85
Contract balances	$ 770	$ 685

Dispositions - Narrative (Detai

Dispositions - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	$ 121	$ 149
Disposal Group, Disposed of by Sale, Not Discontinued Operations | The Sheraton Buenos Aires Hotel & Convention Center and Park Tower
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from sale of property	100
Gain on sale of property	53
Disposal Group, Held-for-sale, Not Discontinued Operations | Asia Pacific Properties, North-American Full-Service Property, and Miami Beach EDITION Residences
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	$ 121

Earnings Per Share - Reconcilia

Earnings Per Share - Reconciliation of the Earnings (Losses) and Number of Shares Used in Calculations of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Computation of Basic Earnings Per Share
Net income	$ 398	$ 371
Shares for basic earnings per share (in shares)	358.4	384.9
Basic earnings per share (in USD per share)	$ 1.11	$ 0.96
Computation of Diluted Earnings Per Share
Net income	$ 398	$ 371
Shares for basic earnings per share (in shares)	358.4	384.9
Effect of dilutive securities
Share-based compensation (in shares)	4.9	5.1
Shares for diluted earnings per share (in shares)	363.3	390
Diluted earnings per share (in USD per share)	$ 1.09	$ 0.95

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 42	$ 48
Deferred compensation costs related to unvested awards	$ 318		$ 168
RSUs and PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, weighted average grant-date fair value (in USD per share)	$ 133
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, granted (in shares)	1.3
Stock awards, vesting period	4 years
Stock awards, period of service after grant date	1 year
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, granted (in shares)	0.1
Stock awards, vesting period	3 years

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate	20.80%	25.00%
Cash paid for income taxes, net of refunds	$ 88	$ 37
Provisional estimate of the benefit of the 2017 tax act due to the one-time transition tax	5
Provisional estimate of the impact of the 2017 tax act due to deemed repatriation transition tax	740
Tax expense relating to remitted accumulated earnings of non-U.S. subsidiaries	$ 27

Commitments and Contingencies -

Commitments and Contingencies - Guarantees (Details) $ in Millions	Mar. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	$ 373
Recorded Liability for Guarantees	186
Debt service
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	131
Recorded Liability for Guarantees	76
Operating profit
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	232
Recorded Liability for Guarantees	108
Other
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	10
Recorded Liability for Guarantees	$ 2

Commitments and Contingencies38

Commitments and Contingencies - Contingent Purchase Obligations (Details) $ in Millions	Mar. 31, 2018USD ($)
Guarantor Obligations [Line Items]
Guarantee	$ 373
Guarantee, recorded liability	186
Sheraton Grand Chicago Hotel
Guarantor Obligations [Line Items]
Guarantee, recorded liability	57
Sheraton Grand Chicago Hotel | Hotel and Leasehold
Guarantor Obligations [Line Items]
Guarantee	300
Sheraton Grand Chicago Hotel | Land
Guarantor Obligations [Line Items]
Guarantee	$ 200

Long-Term Debt (Detail)

Long-Term Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Credit Facility	$ 0	$ 0
Capital lease obligations	170	171
Total debt	8,846	8,238
Less: Current portion of long-term debt	(988)	(398)
Long-term debt, noncurrent	7,858	7,840
Series K Notes, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 (effective interest rate of 4.4%)
Debt Instrument [Line Items]
Senior notes	598	598
Series L Notes, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 (effective interest rate of 3.4%)
Debt Instrument [Line Items]
Senior notes	348	348
Series M Notes, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 (effective interest rate of 3.6%)
Debt Instrument [Line Items]
Senior notes	348	348
Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 (effective interest rate of 3.4%)
Debt Instrument [Line Items]
Senior notes	397	397
Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 (effective interest rate of 3.1%)
Debt Instrument [Line Items]
Senior notes	448	447
Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%)
Debt Instrument [Line Items]
Senior notes	345	345
Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 (effective interest rate of 2.5%)
Debt Instrument [Line Items]
Senior notes	744	744
Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%)
Debt Instrument [Line Items]
Senior notes	743	743
Series S Notes, interest rate of 6.8%, face amount of $324, maturing May 15, 2018 (effective interest rate of 1.7%)
Debt Instrument [Line Items]
Senior notes	326	330
Series T Notes, interest rate of 7.2%, face amount of $181, maturing December 1, 2019 (effective interest rate of 2.3%)
Debt Instrument [Line Items]
Senior notes	194	197
Series U Notes, interest rate of 3.1%, face amount of $291, maturing February 15, 2023 (effective interest rate of 3.1%)
Debt Instrument [Line Items]
Senior notes	291	291
Series V Notes, interest rate of 3.8%, face amount of $318, maturing March 15, 2025 (effective interest rate of 2.8%)
Debt Instrument [Line Items]
Senior notes	337	337
Series W Notes, interest rate of 4.5%, face amount of $278, maturing October 1, 2034 (effective interest rate of 4.1%)
Debt Instrument [Line Items]
Senior notes	$ 292	292
Senior Notes | Series K Notes, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 (effective interest rate of 4.4%)
Debt Instrument [Line Items]
Interest rate	3.00%
Senior notes, face amount	$ 600
Effective interest rate	4.40%
Senior Notes | Series L Notes, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 (effective interest rate of 3.4%)
Debt Instrument [Line Items]
Interest rate	3.30%
Senior notes, face amount	$ 350
Effective interest rate	3.40%
Senior Notes | Series M Notes, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 (effective interest rate of 3.6%)
Debt Instrument [Line Items]
Interest rate	3.40%
Senior notes, face amount	$ 350
Effective interest rate	3.60%
Senior Notes | Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 (effective interest rate of 3.4%)
Debt Instrument [Line Items]
Interest rate	3.10%
Senior notes, face amount	$ 400
Effective interest rate	3.40%
Senior Notes | Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 (effective interest rate of 3.1%)
Debt Instrument [Line Items]
Interest rate	2.90%
Senior notes, face amount	$ 450
Effective interest rate	3.10%
Senior Notes | Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%)
Debt Instrument [Line Items]
Interest rate	3.80%
Senior notes, face amount	$ 350
Effective interest rate	4.00%
Senior Notes | Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 (effective interest rate of 2.5%)
Debt Instrument [Line Items]
Interest rate	2.30%
Senior notes, face amount	$ 750
Effective interest rate	2.50%
Senior Notes | Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%)
Debt Instrument [Line Items]
Interest rate	3.10%
Senior notes, face amount	$ 750
Effective interest rate	3.30%
Senior Notes | Series S Notes, interest rate of 6.8%, face amount of $324, maturing May 15, 2018 (effective interest rate of 1.7%)
Debt Instrument [Line Items]
Interest rate	6.80%
Senior notes, face amount	$ 324
Effective interest rate	1.70%
Senior Notes | Series T Notes, interest rate of 7.2%, face amount of $181, maturing December 1, 2019 (effective interest rate of 2.3%)
Debt Instrument [Line Items]
Interest rate	7.20%
Senior notes, face amount	$ 181
Effective interest rate	2.30%
Senior Notes | Series U Notes, interest rate of 3.1%, face amount of $291, maturing February 15, 2023 (effective interest rate of 3.1%)
Debt Instrument [Line Items]
Interest rate	3.10%
Senior notes, face amount	$ 291
Effective interest rate	3.10%
Senior Notes | Series V Notes, interest rate of 3.8%, face amount of $318, maturing March 15, 2025 (effective interest rate of 2.8%)
Debt Instrument [Line Items]
Interest rate	3.80%
Senior notes, face amount	$ 318
Effective interest rate	2.80%
Senior Notes | Series W Notes, interest rate of 4.5%, face amount of $278, maturing October 1, 2034 (effective interest rate of 4.1%)
Debt Instrument [Line Items]
Interest rate	4.50%
Senior notes, face amount	$ 278
Effective interest rate	4.10%
Commercial paper
Debt Instrument [Line Items]
Commercial paper	$ 2,998	2,371
Other
Debt Instrument [Line Items]
Other	$ 267	$ 279

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	May 10, 2018	Mar. 31, 2018	Mar. 31, 2017
Debt Disclosure [Abstract]
Interest paid, net of amounts capitalized		$ 51	$ 49
Maximum borrowing capacity under credit facility		$ 4,000
Subsequent Event | Senior Notes | Series X Senior Notes
Debt Instrument [Line Items]
Senior notes, face amount	$ 450
Interest rate	4.00%
Proceeds from debt offering	$ 443

Fair Value of Financial Instr41

Fair Value of Financial Instruments - Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans	$ 147	$ 142
Other noncurrent liabilities	(2,283)	(2,610)
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans	147	142
Total noncurrent financial assets	147	142
Senior Notes	(4,487)	(5,087)
Commercial paper	(2,998)	(2,371)
Other long-term debt	(209)	(217)
Other noncurrent liabilities	(174)	(178)
Total noncurrent financial liabilities	(7,868)	(7,853)
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans	133	130
Total noncurrent financial assets	133	130
Senior Notes	(4,404)	(5,126)
Commercial paper	(2,998)	(2,371)
Other long-term debt	(211)	(221)
Other noncurrent liabilities	(174)	(178)
Total noncurrent financial liabilities	$ (7,787)	$ (7,896)

Other Comprehensive (Loss) In42

Other Comprehensive (Loss) Income and Shareholders' Equity - Accumulated Other Comprehensive (Loss) Income Activity (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	$ 3,731
Other comprehensive income (loss) before reclassifications	149	$ 185
Amounts reclassified from accumulated other comprehensive income (loss)	13	0
Net other comprehensive income (loss)	162	185
Balance at end of period	3,566
Other comprehensive income (loss) before reclassification related to foreign current translation adjustment, loss on intra-equity foreign currency transaction	36	16
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(23)	(503)
Other comprehensive income (loss) before reclassifications	152	188
Amounts reclassified from accumulated other comprehensive income (loss)	9	0
Net other comprehensive income (loss)	161	188
Balance at end of period	138	(315)
Derivative Instrument Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(10)	(5)
Other comprehensive income (loss) before reclassifications	(3)	(2)
Amounts reclassified from accumulated other comprehensive income (loss)	4	0
Net other comprehensive income (loss)	1	(2)
Balance at end of period	(9)	(7)
Available-For-Sale Securities Unrealized Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	4	6
Other comprehensive income (loss) before reclassifications	0	(1)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Net other comprehensive income (loss)	0	(1)
Balance at end of period	0	5
Pension and Postretirement Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	12	5
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Net other comprehensive income (loss)	0	0
Balance at end of period	12	5
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(17)	(497)
Net other comprehensive income (loss)	162
Balance at end of period	$ 141	$ (312)
Adoption of ASU 2016-01 | Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment of accounting principle			$ 0
Adoption of ASU 2016-01 | Derivative Instrument Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment of accounting principle			0
Adoption of ASU 2016-01 | Available-For-Sale Securities Unrealized Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment of accounting principle			(4)
Adoption of ASU 2016-01 | Pension and Postretirement Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment of accounting principle			0
Adoption of ASU 2016-01 | Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment of accounting principle			$ (4)

Other Comprehensive (Loss) In43

Other Comprehensive (Loss) Income and Shareholders' Equity - Changes in Shareholders' Equity (Deficit) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 01, 2018	Dec. 31, 2017	Jan. 01, 2016
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	$ 3,731
Balance at beginning of period (in shares)	359.1
Balance at beginning of period (as adjusted)	$ 3,566			$ 3,582
Net income	398	$ 371
Other comprehensive income	162	185
Dividends ($0.33 per share)	(118)
Share-based compensation plans	$ (48)
Share-based compensation plans (in shares)	1.3
Purchase of treasury stock	$ (782)
Purchase of treasury stock (in shares)	(5.6)
Balance at end of period	$ 3,566
Balance at end of period (in shares)	354.8
Cash dividends (in USD per share)	$ 0.33
Class A Common Stock
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	$ 5
Balance at beginning of period (as adjusted)				5
Balance at end of period	5
Additional Paid-in- Capital
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	5,770
Balance at beginning of period (as adjusted)				5,770
Share-based compensation plans	(85)
Balance at end of period	5,685
Retained Earnings
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	7,391
Balance at beginning of period (as adjusted)				7,242
Net income	398
Dividends ($0.33 per share)	(118)
Balance at end of period	7,898
Treasury Stock, at Cost
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	(9,418)
Balance at beginning of period (as adjusted)				(9,418)
Share-based compensation plans	37
Purchase of treasury stock	(782)
Balance at end of period	(10,163)
Accumulated Other Comprehensive Loss
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	(17)	(497)
Balance at beginning of period (as adjusted)				(17)
Other comprehensive income	162
Balance at end of period	141	$ (312)
Adoption of ASU 2014-09
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Adoption of ASU 2014-09				(149)
Adoption of ASU 2014-09 | Retained Earnings
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Adoption of ASU 2014-09				(149)	$ 264
Adoption of ASU 2014-09 | Accumulated Other Comprehensive Loss
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Adoption of ASU 2014-09				0
Adoption of ASU 2016-01
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Adoption of ASU	0
Adoption of ASU 2016-01 | Retained Earnings
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Adoption of ASU 2014-09			$ 4
Adoption of ASU	4
Adoption of ASU 2016-01 | Accumulated Other Comprehensive Loss
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Adoption of ASU 2014-09				$ (4)
Adoption of ASU	(4)
Adoption of ASU 2016-16
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Adoption of ASU	372
Adoption of ASU 2016-16 | Retained Earnings
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Adoption of ASU 2014-09			$ 372
Adoption of ASU	$ 372

Business Segments - Segment Rev

Business Segments - Segment Revenues (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 5,006	$ 4,912
Total segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	4,862	4,734
Other unallocated corporate
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	144	178
North American Full-Service | Total segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	3,299	3,240
North American Limited-Service | Total segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	761	741
Asia Pacific | Total segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	275	241
Other International | Total segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 527	$ 512

Business Segments - Segment Pro

Business Segments - Segment Profits (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profits	$ 500	$ 546
Interest expense, net of interest income	(70)	(63)
Income taxes	(104)	(123)
NET INCOME	398	371
Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profits	730	701
Other unallocated corporate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profits	(158)	(144)
North American Full-Service | Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profits	277	302
North American Limited-Service | Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profits	182	187
Asia Pacific | Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profits	112	94
Other International | Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profits	$ 159	$ 118

Uncategorized Items - mar-20180

Label	Element	Value
Restricted Cash	us-gaap_RestrictedCash	$ 46,000,000