Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2019	May 22, 2019
Document and Entity Information [Abstract]
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Entity Registrant Name	UBER TECHNOLOGIES, INC.
Entity Central Index Key	0001543151
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	No
Entity Filer Category	Non-accelerated Filer
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		1,695,552,739

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 5,745	$ 6,406
Restricted cash and cash equivalents	136	67
Accounts receivable, net of allowance of $34 and $41, respectively	1,074	919
Prepaid expenses and other current assets	975	860
Assets held for sale	0	406
Total current assets	7,930	8,658
Restricted cash and cash equivalents	1,801	1,736
Investments	10,396	10,355
Equity method investments	1,320	1,312
Property and equipment, net	1,325	1,641
Operating lease right-of-use assets	1,323
Intangible assets, net	78	82
Goodwill	153	153
Other assets	64	51
Total assets	24,390	23,988
Liabilities, mezzanine equity and stockholders’ deficit
Accounts payable	151	150
Short-term insurance reserves	961	941
Operating lease liabilities, current	178
Accrued and other current liabilities	3,424	3,157
Liabilities held for sale	0	11
Total current liabilities	4,714	4,259
Long-term insurance reserves	2,137	1,996
Long-term debt, net of current portion	6,939	6,869
Operating lease liabilities, non-current	1,225
Other long-term liabilities	3,587	4,072
Total liabilities	18,602	17,196
Commitments and contingencies (Note 14)
Mezzanine equity
Redeemable non-controlling interest	(4)	0
Redeemable convertible preferred stock, $0.00001 par value, 946,246 and 946,246 shares authorized, 903,607 and 904,530 shares issued and outstanding, respectively; aggregate liquidation preference of $14 and $14, respectively	14,224	14,177
Stockholders’ deficit
Common stock, $0.00001 par value, 2,696,114 and 2,696,114 shares authorized, 457,189 and 457,833 shares issued and outstanding, respectively	0	0
Additional paid-in capital	682	668
Accumulated other comprehensive loss	(246)	(188)
Accumulated deficit	(8,868)	(7,865)
Total stockholders’ deficit	(8,432)	(7,385)
Total liabilities, mezzanine equity, and stockholders’ deficit	$ 24,390	$ 23,988

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowance for accounts receivable	$ 41	$ 34
Par value (in dollars per share)	$ 0.00001	$ 0.00001
Preferred share authorized (in shares)	946,246	946,246
Preferred shares issued (in shares)	904,530	903,607
Preferred shares outstanding (in shares)	904,530	903,607
Aggregate liquidation preference	$ 14	$ 14
Common stock par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock shares authorized (in shares)	2,696,114	2,696,114
Common stock shares issued (in shares)	457,833	457,189
Common stock shares outstanding (in shares)	457,833	457,189

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenue	$ 3,099	$ 2,584
Costs and expenses
Cost of revenue, exclusive of depreciation and amortization shown separately below	1,681	1,156
Operations and support	434	372
Sales and marketing	1,040	677
Research and development	409	340
General and administrative	423	429
Depreciation and amortization	146	88
Total costs and expenses	4,133	3,062
Loss from operations	(1,034)	(478)
Interest expense	(217)	(132)
Other income (expense), net	260	4,937
Income (loss) before income taxes and loss from equity method investment	(991)	4,327
Provision for income taxes	19	576
Loss from equity method investment, net of tax	(6)	(3)
Net income (loss) including redeemable non-controlling interest	(1,016)	3,748
Less: net loss attributable to redeemable non-controlling interest, net of tax	(4)	0
Net income (loss) attributable to Uber Technologies, Inc.	$ (1,012)	$ 3,748
Net income (loss) per share attributable to Uber Technologies, Inc. common stockholders:
Basic (in dollars per share)	$ (2.23)	$ 2.00
Diluted (in dollars per share)	$ (2.26)	$ 1.84
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders:
Basic (in shares)	453,543	437,065
Diluted (in shares)	453,619	475,153

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss) including redeemable non-controlling interest	$ (1,016)	$ 3,748
Other comprehensive income (loss), net of tax:
Change in foreign currency translation adjustment	(54)	(7)
Change in unrealized loss on investments in available-for-sale securities	(4)	0
Other comprehensive loss, net of tax	(58)	(7)
Comprehensive income (loss) including redeemable non-controlling interest	(1,074)	3,741
Less: Comprehensive loss attributable to redeemable non-controlling interest	(4)	0
Comprehensive income (loss) attributable to Uber Technologies, Inc.	$ (1,070)	$ 3,741

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=116874947&loc=SL4591551-111686

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3000-108585

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 10: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4K
-URI http://asc.fasb.org/extlink&oid=116874947&loc=SL4591552-111686

+ Details

CONDENSED CONSOLIDATED STATEMENTS OF MEZZANIE EQUITY AND STOCKHOLDERS' DEFICIT - USD ($) shares in Thousands, $ in Millions	Total	Redeemable Non-Controlling Interest	Redeemable Convertible Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Stockholders' equity, beginning balance at Dec. 31, 2017	$ (8,557)			$ 0	$ 320	$ (3)	$ (8,874)
Shares, outstanding at Dec. 31, 2017				443,394
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock warrants	1			$ 0	1
Exercise of common stock warrants (in shares)				31
Repurchase of outstanding stock	5			$ 0			5
Repurchase of outstanding stock (in shares)				(1,707)
Issuance of common stock from stock option exercise and restricted stock awards	15			$ 0	15
Issuance of common stock from stock option exercise and restricted stock awards (in shares)				7,689
Repurchase of unvested early-exercised stock options	0			$ 0
Repurchase of unvested early-exercised stock options (in shares)				(1)
Reclassification of early-exercised stock options from liability, net	1				1
Stock-based compensation	17				17
Issuance and repayment of employee loans collateralized by outstanding common stock	(1)						(1)
Unrealized loss on available-for-sale securities, net of tax	0
Issuance of common stock as consideration for investment and acquisition	52			$ 0	52
Issuance of common stock as consideration for investment and acquisition (in shares)				1,528
Foreign currency translation adjustment	(7)					(7)
Net income (loss)	3,748						3,748
Stockholders' equity, ending balance at Mar. 31, 2018	(4,726)			$ 0	406	(10)	(5,122)
Shares, outstanding at Mar. 31, 2018				450,934
Mezzanine Equity, Amount at Dec. 31, 2017		$ 0	$ 12,210
Mezzanine Equity, Shares at Dec. 31, 2017			863,305
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Series G redeemable convertible preferred stock, net of issuance costs	0		$ 1,500
Issuance of Series G redeemable convertible preferred stock, net of issuance costs (in shares)			30,755
Mezzanine Equity, Amount at Mar. 31, 2018		0	$ 13,710
Mezzanine Equity, Shares at Mar. 31, 2018			894,060
Stockholders' equity, beginning balance at Dec. 31, 2018	$ (7,385)			$ 0	668	(188)	(7,865)
Shares, outstanding at Dec. 31, 2018	457,189			457,189
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock warrants			$ 45
Exercise of common stock warrants (in shares)			923
Exercise of warrants	$ 0
Lapsing of repurchase option related to Series E redeemable convertible preferred stock issued to a non-employee service provider	0		$ 2
Lapsing of repurchase option related to Series E redeemable convertible preferred stock issued to a non-employee service provider (in shares)			0
Repurchase of outstanding stock	0			$ 0
Repurchase of outstanding stock (in shares)				(1)
Exercise of stock options	4			$ 0	4
Exercise of stock options (in shares)				677
Repurchase of unvested early-exercised stock options	0			$ 0
Repurchase of unvested early-exercised stock options (in shares)				(32)
Stock-based compensation	10				10
Unrealized loss on available-for-sale securities, net of tax	(4)					(4)
Foreign currency translation adjustment	(54)					(54)
Net income (loss)	(1,012)						(1,012)
Mezzanine equity, net loss		(4)
Stockholders' equity, ending balance at Mar. 31, 2019	$ (8,432)			$ 0	$ 682	$ (246)	$ (8,868)
Shares, outstanding at Mar. 31, 2019	457,833			457,833
Mezzanine Equity, Amount at Dec. 31, 2018		0	$ 14,177
Mezzanine Equity, Shares at Dec. 31, 2018	903,607		903,607
Mezzanine Equity, Amount at Mar. 31, 2019		$ (4)	$ 14,224
Mezzanine Equity, Shares at Mar. 31, 2019	904,530		904,530

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income (loss) including redeemable non-controlling interest	$ (1,016)	$ 3,748
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	146	88
Bad debt expense	47	12
Stock-based compensation	11	61
Gain on business divestitures	0	(3,161)
Deferred income tax	4	486
Revaluation of derivative liabilities	(175)	367
Accretion of discount on long-term debt	53	70
Payment-in-kind interest	6	18
Loss on disposal of property and equipment	10	15
Impairment on long-lived assets held for sale	0	20
Loss from equity method investment	6	3
Gain on debt and equity securities, net	(16)	(1,984)
Non-cash deferred revenue	(13)	0
Gain on extinguishment of warrant and call option	0	(120)
Unrealized foreign currency transactions	(4)	(12)
Other	(1)	3
Changes in operating assets and liabilities:
Accounts receivable	(210)	(4)
Prepaid expenses and other assets	(75)	(175)
Accounts payable	0	(66)
Accrued insurance reserve	161	260
Accrued expenses and other liabilities	344	74
Net cash used in operating activities	(722)	(297)
Cash flows from investing activities
Proceeds from insurance reimbursement, sale and disposal of property and equipment	40	138
Purchase of property and equipment	(129)	(90)
Purchase of equity method investments	0	(423)
Proceeds from business disposal, net of cash divested	293	0
Net cash provided by (used in) investing activities	204	(375)
Cash flows from financing activities
Proceeds from exercise of stock options, net of repurchases	2	15
Repurchase of outstanding shares	0	(7)
Principal repayment on term loan	(7)	(3)
Principal repayment on revolving lines of credit	0	(77)
Principal payments on capital leases		(19)
Principal payments on capital leases	(41)
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs	0	1,250
Dissolution of joint venture and subsequent proceeds	0	19
Other	0	(64)
Net cash provided by (used in) financing activities	(46)	1,114
Effect of exchange rate changes on cash and cash equivalents, and restricted cash and cash equivalents	3	2
Net increase (decrease) in cash and cash equivalents, and restricted cash and cash equivalents	(561)	444
Cash and cash equivalents, and restricted cash and cash equivalents
Reclassification from (to) assets held for sale during the period	34	(10)
End of period, excluding cash classified within assets held for sale	7,682	6,262
Reconciliation of cash and cash equivalents, and restricted cash and cash equivalents to the condensed consolidated balance sheets
Cash and cash equivalents	5,745	4,716
Restricted cash and cash equivalents-current	136	117
Restricted cash and cash equivalents-non-current	1,801	1,429
Total cash and cash equivalents, and restricted cash and cash equivalents	7,682	6,262
Cash paid for:
Interest, net of amount capitalized	42	16
Income taxes, net of refunds	34	53
Non-cash investing and financing activities:
Financed construction projects	0	36
Settlement of litigation through issuance of redeemable convertible preferred stock	0	250
Ownership interest in MLU B.V. received in connection with the disposition of Uber Russia/CIS operations	0	1,410
Grab debt security received in exchange for the sale of Southeast Asia operations	$ 0	$ 2,275

Basis of Presentation and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Note 1 - Basis of Presentation and Summary of Significant Accounting Policies Description of Business Uber Technologies, Inc. (“Uber” or “the Company”) was incorporated in Delaware in July 2010, and is headquartered in San Francisco, California. The Company is a technology company that is powering movement in countries around the world, principally in the United States and Canada, Latin America, Europe, the Middle East, and Asia (excluding China). The Company’s principal activities are to develop and support proprietary technology applications (“platform(s)”) that enable independent providers of ridesharing services (“Driver Partner(s)”), Eats meal preparation services (“Restaurant Partner(s)”) and Eats meal delivery services (“Delivery Partner(s)”), collectively the Company’s “Partners,” to transact with “Rider(s)” (for ridesharing services) and “Eater(s)” (for meal preparation and delivery services), collectively defined as “end-user” or “end-users.” Driver Partners provide ridesharing services to Riders through a range of offerings based on vehicle type and/or the number of Riders. Restaurant Partners and Delivery Partners provide meal preparation and delivery services, respectively, to Eaters. In addition, the Company also provides freight transportation services to Shippers within the freight industry and leases vehicles to third-parties that may use the vehicles to provide ridesharing or Eats services through the Platforms. Refer to Note 2 - Revenue for further information. The Company has organized its operations into two operating and reportable segments: Core Platform and Other Bets. Core Platform primarily includes the ridesharing and Uber Eats products; while Other Bets primarily includes the Company’s Freight and New Mobility products. Refer to Note 13 - Segment Information and Geographic Information for further information. Initial Public Offering On May 14, 2019, the Company closed its initial public offering (“IPO”), in which it issued and sold 180 million shares of its common stock. The price was $45.00 per share. The Company received net proceeds of approximately $8.0 billion from the IPO after deducting underwriting discounts and commissions of $106 million and offering expenses. Refer to Note 17 - Subsequent Events for further information. Upon the closing of the IPO, all shares of the Company’s outstanding redeemable convertible preferred stock automatically converted into 905 million shares of common stock. Additionally, an outstanding warrant which became exercisable upon the closing of the IPO was exercised to purchase 0.2 million shares of common stock. Pending Acquisition of Careem On March 26, 2019, the Company entered into an asset purchase agreement (the “Agreement”) with Careem Inc. (“Careem”). Pursuant to the Agreement, upon the terms and subject to the conditions thereof, Augusta Acquisition B.V., an indirect wholly-owned subsidiary of the Company, will acquire substantially all of the assets and assume substantially all of the liabilities of Careem for consideration of approximately $3.1 billion, subject to certain adjustments. The total consideration will consist of up to approximately $1.7 billion in non-interest-bearing unsecured convertible notes and approximately $1.4 billion in cash. Careem is a Dubai-based company that provides ridesharing, meal delivery, and payment services across the Middle East, North Africa, and Pakistan. The acquisition is subject to applicable competition authority approvals in certain of the countries in which Careem operates. The closing is expected to occur in January 2020. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. The condensed consolidated balance sheet as of December 31, 2018 included herein was derived from the audited consolidated financial statements as of that date but does not include all of the information and notes required by GAAP for complete financial statements. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements and the related notes thereto as of and for the year ended December 31, 2018, included in the Company’s final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended (“the Securities Act”), on May 13, 2019 (“the Prospectus”). In the opinion of management, these financial statements include all adjustments, which are of a normal recurring nature, necessary for a fair statement of the financial position, results of operations, cash flows and the change in equity for the periods presented. Other than described below, there have been no changes to the Company’s significant accounting policies described in the Prospectus that have had a material impact on the Company’s condensed consolidated financial statements and related notes, except for the adoption of the new accounting standard related to lease accounting. Basis of Consolidation The condensed consolidated financial statements of the Company include the accounts of the Company and entities consolidated under the variable interest and voting models. All intercompany balances and transactions have been eliminated. Refer to Note 15 - Variable Interest Entities ("VIEs") for further information. Use of Estimates The preparation of the Company’s unaudited condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions, which affect the reported amounts in the financial statements and accompanying notes. Estimates are based on historical experience, where applicable, and other assumptions which management believes are reasonable under the circumstances. On an ongoing basis, the Company evaluates its estimates, including those related to the incremental borrowing rate (“IBR”) applied in lease accounting, accounts receivable allowances, fair values of investments and other financial instruments, useful lives of amortizable long-lived assets and intangible assets, stock-based compensation, income and non-income taxes, insurance reserves, and contingent liabilities. These estimates are inherently subject to judgment and actual results could differ from those estimates. Significant Accounting Policies - Leases The Company accounts for leases in accordance with ASC 842, Leases (“ASC 842”), which requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. The Company adopted ASC 842 along with all subsequent ASU clarifications and improvements that are applicable to the Company, on January 1, 2019, using the modified retrospective transition method and used the effective date as the date of initial application. Consequently, financial information is not updated and the disclosures required under ASC 842 are not provided for dates and periods before January 1, 2019. ASC 842 provides a number of optional practical expedients in transition. The Company elected the “package of practical expedients,” which permits the Company not to reassess under ASC 842 its prior conclusions about lease identification, lease classification and initial direct costs. The Company also made a policy election not to separate non-lease components from lease components, therefore, it will account for lease component and the non-lease components as a single lease component. The Company determines if a contract contains a lease based on whether it has the right to obtain substantially all of the economic benefits from the use of an identified asset and whether it has the right to direct the use of an identified asset in exchange for consideration, which relates to an asset which the Company does not own. Right of use (“ROU”) assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets are recognized as the lease liability, adjusted for lease incentives received. Lease liabilities are recognized at the present value of the future lease payments at the lease commencement date. The interest rate used to determine the present value of the future lease payments is the Company’s incremental borrowing rate (“IBR”), because the interest rate implicit in most of the Company’s leases is not readily determinable. The incremental borrowing rate is a hypothetical rate based on the Company’s understanding of what its credit rating would be. Lease payments may be fixed or variable, however, only fixed payments or in-substance fixed payments are included in the Company’s lease liability calculation. Variable lease payments are recognized in operating expenses in the period in which the obligation for those payments are incurred. The lease term of operating and finance leases vary from less than a year to 76 years. The Company has leases that include one or more options to extend the lease term for up to 14 years as well as options to terminate the lease within one year. The Company’s lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options. Operating leases are included in operating lease right to use assets, operating lease liabilities, current and operating lease liabilities, non-current on the Company’s condensed consolidated balance sheets. Finance leases are included in property and equipment, net, accrued and other current liabilities, and other long-term liabilities on the Company’s condensed consolidated balance sheets. As of March 31, 2019, less than 15% of the Company’s ROU assets were generated from leased assets outside of the U.S. Recently Adopted Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. Upon adoption of the new leasing standard on January 1, 2019, the Company recognized ROU assets of $888 million and lease liabilities of $963 million. The Company reassessed the build-to-suit leases that no longer meet the control-based build-to-suit model and derecognized $392 million in build-to-suit assets, $350 million corresponding financing obligation, and recorded $9 million of deferred tax liability. The initial cash contribution to the Mission Bay 3 & 4 joint venture that was previously reported as a defeasance of a build-to-suit financing obligation of $60 million was derecognized by reclassifying it as an increase to the Mission Bay 3 & 4 equity method investment. The $9 million difference between the total derecognized assets and total derecognized liabilities was recorded in the opening balance of accumulated deficit, net of tax, as of January 1, 2019. In July 2017, the FASB issued ASU 2017-11, “Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception” to simplify the accounting for certain instruments with down round features. The amendments require companies to disregard the down round feature when assessing whether the instrument is indexed to its own stock, for purposes of determining liability or equity classification. Further, companies that provide earnings per share (“EPS”) data will adjust the basic EPS calculation for the effect of the feature when triggered and will also recognize the effect of the trigger within equity. The Company adopted this new standard as of January 1, 2019 and applied the changes retrospectively. The adoption of the new standard did not have a material impact on the Company’s condensed consolidated financial statements. In June 2018, the FASB issued ASU 2018-07, “Improvements to Non-Employee Share-Based Payment Accounting,” which expands the scope of Topic 718, to include share-based payments issued to non-employees for goods or services. The new standard supersedes Subtopic 505-50. The Company adopted the new standard effective January 1, 2019 on a modified retrospective basis. The new standard did not have a material impact on the Company’s condensed consolidated financial statements. Recently Issued Accounting Pronouncements Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” to require the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The standard also amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The standard is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement,” which modifies the disclosure requirements in ASC 820, “Fair Value Measurement” (“ASC 820”). The new standard is effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. An entity is permitted to early adopt any removed or modified disclosures upon issuance of this ASU and delay adoption of the additional disclosures until their effective date. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract,” which aligns the requirements for capitalizing implementation costs incurred in a cloud computing arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use-software. The standard is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements. In October 2018, the FASB issued ASU 2018-17, “Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities,” which amends the guidance for determining whether a decision-making fee is a variable interest and requires organizations to consider indirect interests held through related parties under common control on a proportional basis rather than as the equivalent of a direct interest in its entirety. The standard is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements.

Revenue

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Revenue

Note 2 - Revenue

The following tables present the Company’s revenues disaggregated by offering and Core Platform revenue by geographical region. Core Platform revenue by geographical region is based on where the trip was completed or meal delivered. This level of disaggregation takes into consideration how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. Revenue is presented in the following tables for the three months ended March 31, 2018 and 2019, respectively (in millions):



	Three Months Ended March 31,
	2018		2019
Ridesharing revenue	$	2,180	$	2,376
Uber Eats revenue	283		536
Vehicle Solutions revenue⁽¹⁾	55		10
Other revenue	26		32
Total Core Platform revenue	2,544		2,954
Total Other Bets revenue	40		145
Total revenue	$	2,584	$	3,099



	Three Months Ended March 31,
	2018		2019
United States and Canada	$	1,387	$	1,750
Latin America ("LATAM")	518		450
Europe, Middle East and Africa ("EMEA")	388		487
Asia Pacific ("APAC")	251		267
Total Core Platform revenue	$	2,544	$	2,954

⁽¹⁾ The Company accounts for Vehicle Solutions revenue as an operating lease as defined under ASC 840 for 2018 and ASC 842 in 2019.

Revenue from Contracts with Customers

Ridesharing Revenue

The Company derives revenue primarily from fees paid by Driver Partners for the use of the Company’s platform(s) and related service to facilitate and complete ridesharing services.

Uber Eats Revenue

The Company derives revenue for Uber Eats from Restaurant Partners’ and Delivery Partners’ use of the Uber Eats platform and related service to facilitate and complete Eats transactions.

Other Revenue

Other revenue consists primarily of revenue from the Company’s Uber for Business (“U4B”), financial partnerships products and other immaterial revenue streams.

Other Bets

Other Bets revenue consists primarily of revenue from Uber Freight and other immaterial revenue streams.

Contract Balances

The Company’s contract assets for performance obligations satisfied prior to payment or contract liabilities for consideration collected prior to satisfying the performance obligations are not material for the three months ended March 31, 2019.

Remaining Performance Obligations

As a result of a single contract entered into with a customer during 2018, the Company had $126 million of consideration allocated to an unfulfilled performance obligation as of March 31, 2019. Revenue recognized during three months ended March 31, 2019 related to the contract was not material.

The Company’s remaining performance obligation is expected to be recognized as follows (in millions):



	Less Than or Equal To 12 Months		Greater Than 12 Months		Total
As of March 31, 2019	$	52	$	74	$	126

Fair Value Measurement

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurement

Note 3 - Fair Value Measurement

The Company’s investments on the condensed consolidated balance sheets consisted of the following as of December 31, 2018 and March 31, 2019 (in millions):



	As of
	December 31, 2018		March 31, 2019
Non-marketable equity securities:
Didi	$	7,953	$	7,953
Other	32		79
Debt securities:
Grab⁽¹⁾	2,328		2,324
Other⁽²⁾	42		40
Investments	$	10,355	$	10,396

⁽¹⁾Recorded at fair value with changes in fair value recorded in other comprehensive income (loss), net of tax.

⁽²⁾Recorded at fair value with changes in fair value recorded in earnings due to the election of the fair value option of accounting for financial instruments.

The Company defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. In accordance with ASC 820, the Company uses the fair value hierarchy, which prioritizes the inputs used to measure fair value. The hierarchy, as defined below, gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The three levels of the fair value hierarchy are set forth below:


Level 1	Observable inputs such as quoted prices in active markets for identical assets or liabilities.


Level 2	Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities in active markets, quoted prices in markets that are not active or inputs other than the quoted prices that are observable either directly or indirectly for the full term of the assets or liabilities.


Level 3	Unobservable inputs in which there is little or no market data and that are significant to the fair value of the assets or liabilities.

The Company measures its cash equivalents, certain investments, warrants, and derivative financial instruments at fair value. The Company classifies its cash equivalents within Level 1 as the Company values these assets using quoted market prices. The fair value of the Company’s Level 1 financial assets is based on quoted market prices of the identical underlying security. The Company’s investments, warrants and embedded derivatives are categorized as Level 3 because they are valued based on unobservable inputs and other estimation techniques due to the absence of quoted market prices, inherent lack of liquidity and the long-term nature of such financial instruments.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents the Company’s financial assets and liabilities measured at fair value on a recurring basis based on the three-tier fair value hierarchy (in millions):



	As of December 31, 2018								As of March 31, 2019
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Financial Assets
Cash and cash equivalents:
Money market funds	$	268	$	—	$	—	$	268	$	519	$	—	$	—	$	519
Restricted cash and cash equivalents:
Money market funds	1,237		—		—		1,237		1,246		—		—		1,246
Other current assets:
Other	—		—		—		—		—		—		3		3
Investments:
Debt securities	—		—		2,370		2,370		—		—		2,364		2,364
Total financial assets	$	1,505	$	—	$	2,370	$	3,875	$	1,765	$	—	$	2,367	$	4,132
Financial Liabilities
Accrued and other current liabilities:
Other	$	—	$	—	$	9	$	9	$	—	$	—	$	—	$	—
Other long-term liabilities:
Warrants	—		—		52		52		—		—		8		8
Embedded derivatives	—		—		2,018		2,018		—		—		1,843		1,843
Total financial liabilities	$	—	$	—	$	2,079	$	2,079	$	—	$	—	$	1,851	$	1,851

During the three months ended March 31, 2019, the Company did not make any transfers between the levels of the fair value hierarchy. The Company's policy is to recognize asset or liability transfers among Level 1, Level 2, and Level 3 at the beginning of the quarter in which a change in circumstances resulted in a transfer.

The following table summarizes the amortized cost, unrealized gains and losses, and fair value of the Company’s financial assets measured at fair value on a recurring basis as of December 31, 2018 and March 31, 2019 (in millions):



	As of December 31, 2018								As of March 31, 2019
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value		Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Investments:
Debt securities	$	2,305	$	65	$	—	$	2,370	$	2,305	$	65	$	(6	)	$	2,364

The Company’s Level 3 debt securities as of December 31, 2018 and March 31, 2019 primarily consist of preferred stock investments in privately held companies without readily determinable fair values.

Depending on the investee’s financing activity in a reporting period, management’s estimate of fair value may be primarily derived from the investee’s financing transactions, including the issuance of preferred stock to new investors. The price in these transactions generally provides the best indication of the enterprise value of the investee. Additionally, based on the timing, volume, and other characteristics of the transaction, the Company may supplement this information by using other valuation techniques, including the guideline public company approach.

The guideline public company approach relies on publicly available market data of comparable companies and uses comparative valuation multiples of the investee’s revenue (actual and forecasted), and therefore, unobservable data primarily consists of short-term revenue projections.

Once the fair value of the investee is estimated, an option pricing model (“OPM”) is employed to allocate value to various classes of securities of the investee, including the class owned by the Company. The model involves making key assumptions around the investees’ expected time to liquidity and volatility.

An increase or decrease in any of the unobservable inputs in isolation, such as the security price in a significant financing transaction of the investee, could result in a material increase or decrease in the Company’s estimate of fair value. Other key unobservable inputs, including short-term revenue projections, time to liquidity, and volatility are less sensitive to the valuation in the respective reporting periods, as a result of the primary weighting on the investee’s financing transactions during 2018 and 2019. In the future, depending on the weight of evidence and valuation approaches used, these or other inputs may have a more significant impact on the Company’s estimate of fair value.

The following table summarizes information about the significant unobservable inputs used in the fair value measurement for the Company’s investment in Grab as of December 31, 2018 and March 31, 2019:

The Company determines realized gains or losses on the sale of equity and debt securities on a specific identification method. The Company did not recognize any other-than-temporary impairment losses during three months ended March 31, 2018 and 2019.

The following table summarizes the amortized cost and fair value of the Company’s debt security with a stated contractual maturity date as of December 31, 2018 and March 31, 2019 (in millions):



	As of December 31, 2018				As of March 31, 2019
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	—	$	—	$	—	$	—
Due after one year through five years	2,275		2,328		2,275		2,324
Total	$	2,275	$	2,328	$	2,275	$	2,324

The following table presents a reconciliation of the Company’s financial assets measured and recorded at fair value on a recurring basis as of March 31, 2019, using significant unobservable inputs (Level 3) (in millions):



	Debt Securities
Balance as of December 31, 2018	$	2,370
Total net gains (losses)
Included in earnings	(2		)
Included in other comprehensive income (loss)	(4		)
Balance as of March 31, 2019	$	2,364

The following table presents a reconciliation of the Company’s financial liabilities measured at fair value as of March 31, 2019 using significant unobservable inputs (Level 3), and the change in fair value recorded in other income (expense), net in the condensed consolidated statements of operations (in millions):



	Warrants			Convertible Debt Embedded Derivative
Balance as of December 31, 2018	$	52		$	2,018
Vesting of share warrants	1			—
Exercise of vested share warrants	(45		)	—
Change in fair value	—			(175		)
Balance as of March 31, 2019	$	8		$	1,843

Convertible Debt Embedded Derivative

Convertible debt embedded derivatives originated from the issuance of the 2021 convertible notes and 2022 convertible notes (collectively the “Convertible Notes”) during 2015. Refer to Note 7 - Long-Term Debt and Revolving Credit Arrangements for further information. The fair value of the embedded derivatives was computed as the difference between the estimated value of the Convertible

Notes with and without the Qualified Initial Public Offering (“QIPO”) Conversion Option (“QIPO Conversion Option”). The fair value of the Convertible Notes with and without the QIPO Conversion Option was estimated utilizing a discounted cash flow model to discount the expected payoffs at various potential QIPO dates to the valuation date. The key inputs to the valuation model included the probability of a QIPO occurring at various times, which was estimated to be 100% cumulatively by 2019 and a discount yield that was derived by the credit spread based on the average of the option-adjusted spreads of comparable instruments plus risk-free rates. The discount rate was updated during the period to reflect the yield of comparable instruments issued as of the subsequent valuation dates (average of 8.2% and 6.3% for the Convertible Notes as of March 31, 2018 and 2019, respectively). Fair value measurements are highly sensitive to changes in these inputs; significant changes in these inputs would result in a significantly higher or lower fair value. No value was attributed to other embedded features as they are triggered by events with a remote probability of occurrence.

Warrant Liabilities

In February 2016, the Company issued two warrants to an investor advisor to purchase up to 205,034 shares and 820,138 shares of the Company’s Series G redeemable convertible preferred stock at an exercise price of $0.01 per share in exchange for advisory services. The warrants were liability-classified due to the contingent redemption features in the underlying preferred stock and were consequently measured at their fair value of $45 million as of December 31, 2018. The vested shares were exercised during the first quarter of 2019, and the Company reclassified the $45 million fair value of the vested shares to Series G redeemable convertible preferred stock.

The Company estimates the fair value of warrants using the Black-Scholes option-pricing model, which approximates the intrinsic value of warrants with a nominal exercise price. The fair value of the Series G redeemable convertible preferred stock is estimated based on a combination of subject company prior transaction methods, which utilizes the value of shares sold in the latest financing on an as-converted basis and allocates the estimated business enterprise value to each class of outstanding securities using an option-pricing back-solve model.

Assets Measured at Fair Value on a Non-Recurring Basis

The Company’s non-financial assets, such as goodwill, intangible assets and property and equipment are adjusted to fair value when an impairment charge is recognized. Such fair value measurements are based predominately on Level 3 inputs.

Non-Marketable Equity Securities

The Company measures its non-marketable equity securities that do not have readily determinable fair values under the measurement alternative at cost less impairment, adjusted by price changes from observable transactions recorded within other income (expense), net in the condensed consolidated statements of operations.

The Company’s non-marketable equity securities are investments in privately held companies without readily determinable fair values and primarily relate to its investment in Didi. Prior to January 1, 2018, the Company accounted for its non-marketable equity securities at cost less impairment. On January 1, 2018, the Company adopted ASU 2016-01, which changed the way the Company accounts for non-marketable securities. The Company now adjusts the carrying value of its non-marketable equity securities to fair value upon observable transactions subsequent to adoption for identical or similar securities of the same issuer or for impairment (referred to as the measurement alternative). Because the Company adopted ASU 2016-01 prospectively under the measurement alternative, any remeasurement recorded after the adoption date and upon occurrence of an observable transaction captures the accumulated appreciation of the equity security as of the date of that transaction. Remeasured non-marketable equity securities are classified within Level 3 in the fair value hierarchy because the Company estimates the fair value of these securities based on valuation methods, including the common stock equivalent method, using the transaction price of similar securities issued by the investee adjusted for contractual rights and obligations of the securities it holds.

The following is a summary of unrealized gains and losses from remeasurement (referred to as upward or downward adjustments) recorded in other income (expense), net in the condensed consolidated statements of operations, and included as adjustments to the carrying value of non-marketable equity securities held during the three months ended March 31, 2018 and 2019 based on the selling price of newly issued shares of similar preferred stock to new investors using the common stock equivalent valuation method and adjusted for any applicable differences in conversion rights (in millions):



	Three Months Ended March 31,
	2018		2019
Upward adjustments	$	1,984	$	18
Downward adjustments (including impairment)	—		—
Total unrealized gain for non-marketable equity securities	$	1,984	$	18

The Company did not record any realized gains or losses for the Company’s non-marketable equity securities as of March 31, 2019.

The following table summarizes the total carrying value of the Company’s non-marketable equity securities held as of December 31, 2018 and March 31, 2019 including cumulative unrealized upward and downward adjustments made to the initial cost basis of the securities (in millions):



	As of
	December 31, 2018		March 31, 2019
Initial cost basis	$	6,001	$	6,030
Upward adjustments	1,984		2,002
Downward adjustments (including impairment)	—		—
Total carrying value at the end of the period	$	7,985	$	8,032

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Equity Method Investments

3 Months Ended

Mar. 31, 2019

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments

Note 4 - Equity Method Investments

The carrying value of the Company’s equity method investments as of December 31, 2018 and March 31, 2019 (in millions) is as follows:



	As of
	December 31, 2018		March 31, 2019
MLU B.V.	$	1,234	$	1,182
Mission Bay 3 & 4⁽¹⁾	78		138
Equity method investments	$	1,312	$	1,320

⁽¹⁾Refer to Note 15 - Variable Interest Entities ("VIEs") for further information on the Company’s interest in Mission Bay 3 & 4.

MLU B.V.

During the first quarter of 2018, the Company contributed the net assets of its Uber Russia/CIS operations into a newly formed private limited liability company (“MLU B.V.” or “Yandex.Taxi joint venture”), with Yandex and the Company holding ownership interests in MLU B.V. The Company contributed $345 million of cash, contracts in the region including Rider, Driver Partner, and Eater contracts, and certain employees in the region to MLU B.V. The Company concurrently issued approximately 2 million shares of Uber Technologies, Inc. Class A common stock, with a fair value of $52 million to MLU B.V.’s parent, Yandex. These shares are subject to a put/call feature resulting in Uber Technologies, Inc.’s contingent obligation to buy back these shares at $48 per share after twelve months from the closing date. Neither the put nor the call had been exercised as of March 31, 2019.

In exchange for consideration contributed, the Company received a seat on MLU B.V.’s board and a 38% equity ownership interest consisting of common stock in MLU B.V. Certain contingent equity issuances of MLU B.V. may dilute the Company’s equity ownership interest to approximately 35%. The investment was determined to be an equity method investment due to the Company’s ability to exercise significant influence over MLU B.V. The initial fair value of the Company’s equity method investment in MLU B.V. was estimated using discounted cash flows of MLU B.V. As a result of the loss of control over Uber Russia/CIS resulting from the transaction, the Company derecognized the assets/liabilities of Uber Russia/CIS and recorded a $954 million gain during the first quarter of 2018 recognized in other income (expense), net in the condensed consolidated statement of operations.

Included in the initial carrying value of $1.4 billion, which represents the fair value on the transaction date, was a basis difference of $908 million related to the difference between the cost of the investment and the Company’s proportionate share of the net assets of MLU B.V. The carrying value of the equity method investments are primarily adjusted for the Company’s share in the losses of MLU B.V. and amortization of basis differences. The carrying value was also adjusted for currency translation adjustments representing fluctuations between the functional currency of the investee, the Ruble and the U.S. Dollar.

As of March 31, 2019, the basis differences between the carrying value of the Company’s investment and its share in the net assets of MLU B.V. amounted to $734 million, including the impact of foreign currency translation, and are comprised primarily of equity method goodwill. Equity method goodwill is not amortized. The Company amortizes the basis difference related to the intangible assets over the estimated useful lives of the assets that gave rise to the difference using the straight-line method. The weighted-average life of the intangible asset is approximately 5.5 years as of March 31, 2019. The investment balance is reviewed for impairment whenever factors indicate that the carrying value of the equity method investment may not be recoverable.

Property and Equipment, Net

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

Note 5 - Property and Equipment, Net

The components of property and equipment, net as of December 31, 2018 and March 31, 2019 were as follows (in millions):



	As of
	December 31, 2018			March 31, 2019
Land	$	67		$	67
Building and site improvements	93			40
Leasehold improvements	315			312
Computer equipment	858			880
Leased computer equipment	288			371
Leased vehicles	34			33
Internal-use software	51			72
Furniture and fixtures	39			39
Dockless e-bikes	10			18
Construction in progress	832			570
Total	2,587			2,402
Less: Accumulated depreciation and amortization	(946		)	(1,077		)
Property and equipment, net	$	1,641		$	1,325

Depreciation expense relating to property and equipment was $82 million and $137 million for the three months ended March 31, 2018 and 2019, respectively.

Amounts in construction in progress represent buildings, leasehold improvements, assets under construction, other assets not placed in service, and build-to-suit leases prior to the adoption of ASC 842 on January 1, 2019. Upon adoption of ASC 842, the Company derecognized build-to-suit assets from construction in progress. Refer to Note 1 - Basis of Presentation and Summary of Significant Accounting Policies for further information.

Leases

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Leases, Finance

Note 6 - Leases

The components of lease expense were as follows (in millions):



	Three Months Ended March 31, 2019
Lease cost
Finance lease cost:
Amortization of assets	$	36
Interest of lease liabilities	4
Operating lease cost	67
Short-term lease cost	8
Variable lease cost	25
Sublease income	(1		)
Total lease cost	$	139

Supplemental cash flow information related to leases was as follows (in millions):



	Three Months Ended March 31, 2019
Other information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from financing leases	$	3
Operating cash flows from operating leases	52
Financing cash flows from financing leases	41
Right-of-use assets obtained in exchange for lease obligations:
Operating lease liabilities⁽¹⁾	$	474
Finance lease liabilities	83

⁽¹⁾Includes $415 million of ROU assets and operating lease liabilities recognized in the current period for Mission Bay 3 & 4 leases which commenced in the first quarter of 2019.

Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate):



	As of March 31, 2019
Operating Leases
Operating lease right-of-use assets	$	1,323
Operating lease liability, current	178
Operating lease liabilities, non-current	1,225
Total operating lease liabilities	$	1,403



	As of March 31, 2019
Finance Leases
Property and equipment, at cost	$	371
Accumulated depreciation	(133		)
Property and equipment, net	$	238
Other current liabilities	$	115
Other long-term liabilities	130
Total finance leases liabilities	$	245



	As of March 31, 2019
Weighted-average remaining lease term
Operating leases	17 years
Finance leases	2 years
Weighted-average discount rate
Operating leases	7.5	%
Finance leases	5.0	%

Maturities of lease liabilities were as follows (in millions):



	As of March 31, 2019
	Operating Leases			Finance Leases
Remainder of 2019	$	169		$	101
2020	210			89
2021	232			63
2022	200			5
2023	169			—
Thereafter	1,974			—
Total undiscounted lease payments	2,954			258
Less: imputed interest	(1,551		)	(13		)
Total lease liabilities	$	1,403		$	245

As of March 31, 2019, the Company had additional operating leases and finance leases, primarily for servers, that have not yet commenced of $17 million and $50 million, respectively. These operating and finance leases will commence between fiscal year 2019 and fiscal year 2020 with lease terms of 1 year to 10 years.

Failed Sale-Leaseback

In 2015, the Company entered into a JV agreement with a real estate developer (“JV Partner”) to develop parcels of land (“the Land”) in San Francisco on which to construct the Company’s new headquarters buildings (the “Buildings”). The Buildings are to consist of two adjacent towers totaling approximately 423,000 rentable square feet. In connection with the JV arrangement, the Company had acquired a 49% interest in the JV, the principal asset of which was the Land on which the Buildings are to be constructed. In November 2016, the Company and the JV Partner agreed to dissolve the JV and terminate the Company’s commitment to the lease of the Buildings (together “the real estate transaction”). Under the terms of the real estate transaction, the Company obtained the rights and title to the partially constructed building, will complete the development of the two office buildings and retain a 100% ownership of the buildings. In connection with the real estate transaction, the Company also executed two 75-year land lease agreements (“Land Leases”). As of March 31, 2019, commitments under the Land Leases total $172 million until February 2032. After 2032, the annual rent amount will adjust annually based on the prevailing consumer price index.

For accounting purposes, the real estate transaction is in substance the sale-leaseback of its 49% indirect interest in the land. Due to the Company’s continuing involvement through a purchase option on the Land, the Company failed to qualify for sale-leaseback accounting. A failed sale-leaseback transaction is accounted for as a financing transaction whereby the cash and deferred sales proceeds received in the real estate transaction are recorded as a financing obligation. Accordingly, the Company’s previous ownership in the JV, which represented its ownership interest in the Land of $65 million, is included in property and equipment, net, and a corresponding financing obligation of $88 million is included in other long-term liabilities as of March 31, 2019. Future land lease payments of $1.8 billion will be allocated 49% to the financing obligation under the failed sale-leaseback arrangement and 51% to the operating lease of land.

Future minimum payments related to the financing obligations under failed sale-leaseback arrangement as of March 31, 2019 are summarized below (in millions):



	Future Minimum Payments under Failed Sale-Leaseback Arrangements
Fiscal Year Ending December 31,
Remainder of 2019	$	—
2020	2
2021	6
2022	6
2023	6
Thereafter	833
Total	$	853

Leases, Operating

Note 6 - Leases

The components of lease expense were as follows (in millions):



	Three Months Ended March 31, 2019
Lease cost
Finance lease cost:
Amortization of assets	$	36
Interest of lease liabilities	4
Operating lease cost	67
Short-term lease cost	8
Variable lease cost	25
Sublease income	(1		)
Total lease cost	$	139

Supplemental cash flow information related to leases was as follows (in millions):



	Three Months Ended March 31, 2019
Other information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from financing leases	$	3
Operating cash flows from operating leases	52
Financing cash flows from financing leases	41
Right-of-use assets obtained in exchange for lease obligations:
Operating lease liabilities⁽¹⁾	$	474
Finance lease liabilities	83

⁽¹⁾Includes $415 million of ROU assets and operating lease liabilities recognized in the current period for Mission Bay 3 & 4 leases which commenced in the first quarter of 2019.

Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate):



	As of March 31, 2019
Operating Leases
Operating lease right-of-use assets	$	1,323
Operating lease liability, current	178
Operating lease liabilities, non-current	1,225
Total operating lease liabilities	$	1,403



	As of March 31, 2019
Finance Leases
Property and equipment, at cost	$	371
Accumulated depreciation	(133		)
Property and equipment, net	$	238
Other current liabilities	$	115
Other long-term liabilities	130
Total finance leases liabilities	$	245



	As of March 31, 2019
Weighted-average remaining lease term
Operating leases	17 years
Finance leases	2 years
Weighted-average discount rate
Operating leases	7.5	%
Finance leases	5.0	%

Maturities of lease liabilities were as follows (in millions):



	As of March 31, 2019
	Operating Leases			Finance Leases
Remainder of 2019	$	169		$	101
2020	210			89
2021	232			63
2022	200			5
2023	169			—
Thereafter	1,974			—
Total undiscounted lease payments	2,954			258
Less: imputed interest	(1,551		)	(13		)
Total lease liabilities	$	1,403		$	245

As of March 31, 2019, the Company had additional operating leases and finance leases, primarily for servers, that have not yet commenced of $17 million and $50 million, respectively. These operating and finance leases will commence between fiscal year 2019 and fiscal year 2020 with lease terms of 1 year to 10 years.

Failed Sale-Leaseback

In 2015, the Company entered into a JV agreement with a real estate developer (“JV Partner”) to develop parcels of land (“the Land”) in San Francisco on which to construct the Company’s new headquarters buildings (the “Buildings”). The Buildings are to consist of two adjacent towers totaling approximately 423,000 rentable square feet. In connection with the JV arrangement, the Company had acquired a 49% interest in the JV, the principal asset of which was the Land on which the Buildings are to be constructed. In November 2016, the Company and the JV Partner agreed to dissolve the JV and terminate the Company’s commitment to the lease of the Buildings (together “the real estate transaction”). Under the terms of the real estate transaction, the Company obtained the rights and title to the partially constructed building, will complete the development of the two office buildings and retain a 100% ownership of the buildings. In connection with the real estate transaction, the Company also executed two 75-year land lease agreements (“Land Leases”). As of March 31, 2019, commitments under the Land Leases total $172 million until February 2032. After 2032, the annual rent amount will adjust annually based on the prevailing consumer price index.

For accounting purposes, the real estate transaction is in substance the sale-leaseback of its 49% indirect interest in the land. Due to the Company’s continuing involvement through a purchase option on the Land, the Company failed to qualify for sale-leaseback accounting. A failed sale-leaseback transaction is accounted for as a financing transaction whereby the cash and deferred sales proceeds received in the real estate transaction are recorded as a financing obligation. Accordingly, the Company’s previous ownership in the JV, which represented its ownership interest in the Land of $65 million, is included in property and equipment, net, and a corresponding financing obligation of $88 million is included in other long-term liabilities as of March 31, 2019. Future land lease payments of $1.8 billion will be allocated 49% to the financing obligation under the failed sale-leaseback arrangement and 51% to the operating lease of land.

Future minimum payments related to the financing obligations under failed sale-leaseback arrangement as of March 31, 2019 are summarized below (in millions):



	Future Minimum Payments under Failed Sale-Leaseback Arrangements
Fiscal Year Ending December 31,
Remainder of 2019	$	—
2020	2
2021	6
2022	6
2023	6
Thereafter	833
Total	$	853

Long-Term Debt and Revolving Credit Arrangements

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Long-Term Debt and Revolving Credit Arrangements

Note 7 - Long-Term Debt and Revolving Credit Arrangements

Components of debt, including the associated effective interest rates were as follows (in millions, except for percentages):



	As of
	December 31, 2018			March 31, 2019			Effective Interest Rate
2016 Senior Secured Term Loan	$	1,124		$	1,121		6.1	%
2018 Senior Secured Term Loan	1,493			1,489			6.2	%
2021 Convertible Notes	1,844			1,867			23.5	%
2022 Convertible Notes	1,030			1,030			13.7	%
2023 Senior Note	500			500			7.7	%
2026 Senior Note	1,500			1,500			8.1	%
Total debt	7,491			7,507
Less: unamortized discount and issuance costs	(595		)	(541		)
Less: current portion of long-term debt	(27		)	(27		)
Total long-term debt	$	6,869		$	6,939

2016 Senior Secured Term Loan

In July 2016, the Company entered into a secured term loan agreement with a syndicate of lenders to issue senior secured floating-rate term loans for a total of $1.2 billion in proceeds, net of debt discount of $23 million and debt issuance costs of $13 million, with a maturity date of July 2023 (the “2016 Senior Secured Term Loan”).

On June 13, 2018, the Company entered into an amendment to the 2016 Senior Secured Term Loan agreement which increased the effective interest rate to 6.1% on the outstanding balance of the 2016 Senior Secured Term Loan as of the amendment date. The maturity date for the 2016 Senior Secured Term Loan remains July 13, 2023. The amendment qualified as a debt modification that did not result in an extinguishment except for an immaterial syndicated amount of the loan.

The 2016 Senior Secured Term Loan is guaranteed by certain material domestic restricted subsidiaries of the Company. The 2016 Senior Secured Term Loan agreement contains customary covenants restricting the Company and certain of its subsidiaries’ ability to incur debt, incur liens and undergo certain fundamental changes, as well as certain financial covenants specified in the contractual agreement. The Company was in compliance with all covenants as of March 31, 2019. The credit agreement also contains customary events of default. The loan is secured by certain intellectual property of the Company and equity of certain material foreign subsidiaries. The 2016 Senior Secured Term Loan also contains restrictions on the payment of dividends.

2018 Senior Secured Term Loan

In April 2018, the Company entered into a secured term loan agreement with a syndicate of lenders to issue secured floating-rate term loans totaling $1.5 billion in proceeds, net of debt discount of $8 million and debt issuance costs of $15 million, with a maturity date of April 2025 (the “2018 Senior Secured Term Loan”). The 2018 Senior Secured Term Loan was issued on a pari passu basis with the existing 2016 Senior Secured Term Loan. The debt discount and debt issuance costs are amortized to interest expense at an effective interest rate of 6.2%. The 2018 Senior Secured Term Loan is guaranteed by certain material domestic restricted subsidiaries of the Company. The 2018 Senior Secured Term Loan agreement contains customary covenants restricting the Company and certain of its subsidiaries’ ability to incur debt, incur liens and undergo certain fundamental changes, as well as certain financial covenants specified

in the contractual agreement. The Company was in compliance with all covenants as of March 31, 2019. The credit agreement also contains customary events of default. The loan is secured by certain intellectual property of the Company and equity of certain material foreign subsidiaries.

The fair values of the Company’s 2016 Senior Secured Term Loan and 2018 Senior Secured Term Loan was $1.1 billion and $1.5 billion, respectively, as of March 31, 2019 and were determined based on quoted prices in markets that are not active, which is considered a Level 2 valuation input.

2021 Convertible Notes

During 2015, the Company issued convertible notes at par for a total of $1.7 billion in proceeds, net of $1 million in debt issuance costs, with an initial maturity date of January 2021 (the “2021 Convertible Notes”). The 2021 Convertible Notes contain various extension options triggered by the events defined in the note agreement and allow the maturity date to be extended up to 2030. The interest rate is 2.5% per annum, payable semi-annually in arrears. During the first four years from the issuance date, at the election of the holders, interest is to be paid in cash or by increasing the principal amount of the 2021 Convertible Notes by payment in kind (“PIK interest”). The holders elected to receive PIK interest during the first four years. The interest rate increases to 12.5% during the last 2 years of the initial term of the 2021 Convertible Notes and is to be paid in cash at the election of the Company. The interest rate during the maturity extension period varies from 3.5% to 12.5% depending on the type of extension option elected.

The 2021 Convertible Notes also contain other embedded features, such as conversion options that are exercisable upon the occurrence of various contingencies. The conversion options involve a discount to the conversion price ranging from 18.0% to 30.5%, increasing with the passage of time. All of the embedded features were analyzed to determine whether they should be bifurcated and separately accounted for as a derivative. Pursuant to such analysis, the Company valued and bifurcated the QIPO Conversion Option, which enables the holders to convert their 2021 Convertible Notes to the shares offered in a QIPO at a predefined discount from the public offering price, and recorded its initial fair value of $1.1 billion as a discount on the 2021 Convertible Notes face amount. The debt discount is amortized to interest expense at an effective interest rate of 23.5%. The Company amortizes the discount over the period until the maturity date of the respective note. The fair value of the QIPO Conversion Option was determined in accordance with the methodology described in Note 3 - Fair Value Measurement, and the changes in fair value are recognized as a component of other income (expense), net in the condensed consolidated statements of operations. The Company recorded $314 million of expense and $129 million of income during the first quarter of 2018 and 2019, respectively, related to the change in the fair value of the 2021 Convertible Notes embedded derivative liability, which was included in total other income (expense), net in the condensed consolidated statements of operations. No value was attributed to other embedded features as they are triggered by events with a remote probability of occurrence. The agreement contains customary covenants that restrict the Company’s ability to, among other things, declare dividends or make certain distributions. On May 14, 2019, the Company closed its IPO, refer to Note 17 - Subsequent Events for further information.

2022 Convertible Notes

During 2015, the Company issued additional convertible notes at par for a total of $949 million in proceeds, net of $0.1 million in debt issuance costs, with an initial maturity date of June 2022 (the “2022 Convertible Notes”). The Company can elect to extend the maturity date of the 2022 Convertible Notes by one year if a material financial market disruption (as defined in the note agreement) exists at initial maturity. The interest rate is 2.5% per annum, compounded semi-annually and payable in PIK interest. If no conversion or settlement event is triggered prior to the 2022 Convertible Notes’ maturity, the 2022 Convertible Notes are redeemed at an 8.0% internal rate of return (“IRR”) either immediately or over a 3-year period, at the Company’s election. The 8.0% IRR payout at maturity is incorporated into the effective interest rate calculation. The 2022 Convertible Notes also contain other embedded features such as conversion options that are exercisable upon the occurrence of various contingencies. The conversion options involve a discount to the conversion price, which ranges from 8.1% to 44.5% increasing with the passage of time. All of the embedded features were analyzed to determine whether they should be bifurcated and separately accounted for as a derivative. Pursuant to such analysis, the Company valued and bifurcated the QIPO Conversion Option, which enables the holders to convert the 2022 Convertible Notes to the shares offered in a QIPO at a predefined discount from the offering price, and recorded its initial fair value of $312 million as a discount on the 2022 Convertible Notes face amount. The debt discount is amortized to interest expense at an effective interest rate of 13.7%. The Company amortizes the discount over the period until the initial maturity date of the respective note. The fair value of the QIPO Conversion Option was determined in accordance with the methodology described in Note 3 - Fair Value Measurement, and the changes in fair value are recognized as a component of other income (expense), net in the condensed consolidated statements of operations. The Company recorded $53 million of expense and $46 million of income during the first quarter of 2018 and 2019, respectively, related to the change in the fair value of the 2022 Convertible Notes embedded derivative liability, which was included in total other income (expense), net in the condensed consolidated statements of operations. No value was attributed to other embedded features as they are triggered by events with a remote probability of occurrence. The agreement contains customary covenants that restrict the Company’s ability to, among other things, declare dividends or make certain distributions.

The 2021 Convertible Notes and the 2022 Convertible Notes are carried on the condensed consolidated balance sheets at their original issuance value, net of unamortized debt discount and issuance costs, and are not marked to fair value each period. The fair values of the 2021 Convertible Notes and the 2022 Convertible Notes were $2.8 billion and $1.4 billion, respectively, as of March 31, 2019. The fair values were determined in accordance with the methodology described in Note 3 - Fair Value Measurement and were categorized as

Level 3 in the fair value hierarchy. On May 14, 2019, the Company closed its IPO, refer to Note 17 - Subsequent Events for further information.

2023 and 2026 Senior Notes

In October 2018, the Company issued five-year notes with aggregate principal amount of $500 million due on November 1, 2023 and eight-year notes with aggregate principal amount of $1.5 billion due on November 1, 2026 (the “2023 and 2026 Senior Notes”) in a private placement offering totaling $2.0 billion. The Company issued the 2023 and 2026 Senior Notes at par and paid approximately $9 million for debt issuance costs. The interest is payable semi-annually on May 1st and November 1st of each year at 7.5% per annum and 8.0% per annum, respectively, beginning on May 1, 2019, and the entire principal amount is due at the time of maturity. The 2023 and 2026 Senior Notes are guaranteed by certain material domestic restricted subsidiaries of the Company. The indentures governing the 2023 and 2026 Senior Notes contain customary covenants restricting the Company and certain of its subsidiaries’ ability to incur debt and incur liens, as well as certain financial covenants specified in the contractual agreements. The Company was in compliance with all covenants as of March 31, 2019.

The fair values of the Company’s 2023 and 2026 Senior Notes were $525 million and $1.6 billion, respectively, as of March 31, 2019 and were determined based on quoted prices in markets that are not active, which is considered a Level 2 valuation input.

The following table presents the amount of interest expense recognized relating to the contractual interest coupon, amortization of the debt discount and issuance costs, and the IRR payout with respect to the Senior Secured Term Loan, the Convertible Notes, and the Senior Notes for the three months ended March 31, 2018 and 2019 (in millions):



	Three Months Ended March 31,
	2018		2019
Contractual interest coupon	$	32	$	140
Amortization of debt discount and issuance costs	72		53
8% IRR payout	14		17
Total interest expense from long-term debt	$	118	$	210

Revolving Credit Arrangements

The Company has an unsecured revolving credit agreement with certain lenders, which provides for $2.3 billion in unsecured credit maturing on June 13, 2023 (“Unsecured Revolving Credit Facility”). In conjunction with the Company’s entry into the 2016 Senior Secured Term Loan, the revolving credit facility agreements were amended to include as collateral the same intellectual property of the Company and the same equity of certain material foreign subsidiaries that were pledged as collateral under the 2016 Senior Secured Term Loan. The credit facility may be guaranteed by certain material domestic restricted subsidiaries of the Company based on certain conditions. As of March 31, 2019, no subsidiary met those conditions and, therefore, were not guarantors of the facility. The credit facility has a term of five years from the original execution date. The credit agreement contains customary covenants restricting the Company and certain of its subsidiaries’ ability to incur debt, incur liens, and undergo certain fundamental changes, as well as certain financial covenants specified in the contractual agreement. The credit agreement also contains customary events of default. The Unsecured Revolving Credit Facility also contains restrictions on the payment of dividends. As of March 31, 2019, there was no balance outstanding on the Unsecured Revolving Credit Facility.

Letters of Credit

The Company’s insurance subsidiary maintains agreements for letters of credit to guarantee the performance of insurance related obligations that are collateralized by cash or investments of the subsidiary. For purposes of securing obligations related to leases and other contractual obligations, the Company also maintains an agreement for letters of credit, which is collateralized by the Company’s Unsecured Revolving Credit Facility and reduces the amount of credit available. As of December 31, 2018 and March 31, 2019, the Company had letters of credit outstanding of $470 million and $473 million, respectively, of which the letters of credit that reduced the available credit under the facility were $166 million and $169 million, respectively.

Assets and Liabilities Held for Sale

3 Months Ended

Mar. 31, 2019

Discontinued Operations and Disposal Groups [Abstract]

Assets and Liabilities Held for Sale

Note 8 - Assets and Liabilities Held for Sale

Lion City Rentals

In December 2017, the Company started exploring strategic options for the sale of Lion City Rentals Pte. Ltd. (“LCR”), a wholly-owned vehicle solutions subsidiary of the Company based in Singapore. The Company entered into a definitive agreement with ComfortDelGro (“Comfort”) and initiated all other actions required to complete the plan to sell the business and concluded that as of December 31, 2017, the transaction met all of the held for sale criteria. In May 2018, the agreement with Comfort was terminated without penalties. The Company remained committed to its plan to sell LCR and continued to present the assets and liabilities as held for sale as of December 31, 2018. In January 2019, an agreement was executed with Waydrive Holdings Pte. Ltd. (“Waydrive”) to purchase the LCR business, specifically 100% of the equity interests of LCR and its subsidiary LCRF Pte. Ltd. (“LCRF”). Fair value of consideration

received included $310 million of cash for the assets and liabilities of LCR and LCRF and up to $33 million of contingent consideration receivable for certain VAT receivables and receivables from certain commercial counterparties. The resulting gain on disposal was not material to the Company. The transaction closed on January 25, 2019.

The LCR businesses were previously included within the Company’s Core Platform segment. The following table summarizes the carrying values of the assets and liabilities classified as held for sale as of December 31, 2018 (in millions):



	As of December 31, 2018
Assets held for sale
Cash and cash equivalents	$	34
Accounts receivable, net	20
Prepaid expenses and other current assets	30
Property and equipment, net	322
Total assets held for sale	406

Liabilities held for sale
Accounts payable	2
Accrued liabilities	2
Other current liabilities	7
Total liabilities held for sale	11
Net assets held for sale	$	395

Supplemental Financial Statement Information

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Financial Statement Information

Note 9 - Supplemental Financial Statement Information

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets as of December 31, 2018 and March 31, 2019 were as follows (in millions):



	As of
	December 31, 2018		March 31, 2019
Prepaid expenses	$	265	$	252
Other receivables	416		483
Other	179		240
Prepaid expenses and other current assets	$	860	$	975

Accrued and Other Current Liabilities

Accrued and other current liabilities as of December 31, 2018 and March 31, 2019 were as follows (in millions):



	As of
	December 31, 2018		March 31, 2019
Accrued legal, regulatory and non-income taxes	$	1,134	$	1,175
Accrued Partner liability	459		725
Accrued professional and contractor services	298		310
Accrued compensation and employee benefits	261		151
Accrued marketing expenses	152		145
Other accrued expenses	160		185
Income and other tax liabilities	157		125
Government and airport fees payable	104		124
Short-term finance lease obligation for computer equipment	110		115
Other	322		369
Accrued and other current liabilities	$	3,157	$	3,424

Other Long-Term Liabilities

Other long-term liabilities as of December 31, 2018 and March 31, 2019 were as follows (in millions):



	As of
	December 31, 2018		March 31, 2019
Convertible debt embedded derivatives (Note 7)	$	2,018	$	1,843
Deferred tax liabilities	1,072		1,068
Financing obligation	436		88
Income tax payable	80		101
Other	466		487
Other long-term liabilities	$	4,072	$	3,587

Accumulated Other Comprehensive Income (Loss)

The changes in composition of accumulated other comprehensive income (loss), net of tax, for the three months ended March 31, 2018 and 2019 were as follows (in millions):



	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Available-for-Sale Securities, Net of Tax		Total
Balance as of December 31, 2017	$	(3	)	$	—	$	(3	)
Other comprehensive income (loss) before reclassifications	(7		)	—		(7		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			—		—
Other comprehensive income (loss)	(7		)	—		(7		)
Balance as of March 31, 2018	$	(10	)	$	—	$	(10	)



	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Available-for-Sale Securities, Net of Tax			Total
Balance as of December 31, 2018	$	(228	)	$	40		$	(188	)
Other comprehensive income (loss) before reclassifications	(54		)	(4		)	(58		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			—			—
Other comprehensive income (loss)	(54		)	(4		)	(58		)
Balance as of March 31, 2019	$	(282	)	$	36		$	(246	)

Other Income (Expense), Net

The components of other income (expense), net, for the three months ended March 31, 2018 and 2019 were as follows (in millions):



	Three Months Ended March 31,
	2018			2019
Interest income	$	18		$	44
Foreign currency exchange gains (losses), net	13			(1		)
Gain on divestitures ⁽¹⁾	3,161			—
Gain on debt and equity securities, net ⁽²⁾	1,984			16
Change in fair value of embedded derivatives	(367		)	175
Other	128			26
Other income (expense), net	$	4,937		$	260

⁽¹⁾ During the first quarter of 2018, Gain on divestitures primarily includes a $2.2 billion gain on the sale of the Company’s Southeast Asia operations to Grab Holding Inc. (“Grab”) and a $954 million gain on the disposal of the Company’s Uber Russia/CIS operations. On March 25, 2018, two wholly-owned subsidiaries of the Company signed and completed an agreement with Grab pursuant to which Grab hired employees and acquired certain assets of the Company in the region, including Rider, Driver Partners, and Eater contracts in Southeast Asia. The net assets contributed by the Company were not material. In exchange, the Company received shares of Grab Series G preferred stock which was recorded at fair value as additional sale consideration. Refer to Note 4 - Equity Method Investments for more information on the disposal of the Company's Uber Russia/CIS operations.

⁽²⁾ During the first quarter of 2018, Gain on debt and equity securities, net represents a $2.0 billion unrealized gain on the Company’s non-marketable equity securities related to Didi. Refer to Note 3 - Fair Value Measurement for further information.

Redeemable Convertible Preferred Stock, Common Stock, and Stockholders' Deficit

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Redeemable Convertible Preferred Stock, Common Stock, and Stockholders' Deficit

Note 10 - Redeemable Convertible Preferred Stock, Common Stock, and Stockholders’ Deficit

Redeemable Convertible Preferred Stock

As of December 31, 2018, there were warrants to purchase 150,071 shares of Series E redeemable convertible preferred stock and 922,655 shares of Series G redeemable convertible preferred stock outstanding. During the three months ended March 31, 2019, the warrant to purchase Series G redeemable convertible preferred stock was exercised in full and the fair value of the warrant was reclassified to redeemable convertible preferred stock. Refer to Note 3 - Fair Value Measurement for further information.

Restricted Common Stock

The Company has granted restricted common stock to certain continuing employees, primarily in connection with acquisitions. Vesting of this stock may be dependent on a combination of service and performance conditions that become satisfied upon the occurrence of a qualifying event. The Company has the right to repurchase shares for which the vesting conditions are not satisfied.

The following table summarizes the activity related to the Company’s restricted common stock for the three months ended March 31, 2019. For purposes of this table, vested restricted common stock represents the shares for which the service condition had been fulfilled as of the three months ended March 31, 2019 (in thousands, except per share amounts):



	Number of Shares		Weighted-average Grant-Date Fair Value per Share
Unvested restricted common stock as of December 31, 2018	898		$	30.33
Granted	—		$	—
Vested	(209	)	$	34.82
Canceled	(32	)	$	34.86
Unvested restricted common stock as of March 31, 2019	657		$	28.68

Equity Incentive Plans

The Company maintains two equity incentive plans: the 2013 Equity Incentive Plan (“2013 Plan”) and the 2010 Stock Plan (“2010 Plan” and collectively, “Plans”). The 2013 Plan serves as the successor to the 2010 Plan and provides for the issuance of incentive and nonqualified stock options, SARs, restricted stock and restricted stock units (“RSUs”) to employees, consultants and advisors of the Company.

In January 2019, the Company’s board of directors approved an amendment to the 2013 Plan to increase the number of shares of common stock reserved for issuance by 85 million shares, for a total of 293 million shares reserved.

In March 2019, the Company’s board of directors adopted the 2019 Equity Incentive Plan (“2019 Plan”). The 2019 Plan was approved in April 2019. The 2019 Plan became effective on May 9, 2019, the date of the underwriting agreement between the Company and the underwriters for the IPO. The 2019 Plan is the successor to the 2013 Plan. There are 130 million shares of common stock reserved for future issuance under the 2019 Plan.

The Company’s 2019 Plan provides for the grant of ISOs, NSOs, SARs, restricted stock awards, RSUs, performance-based awards, and other awards (that are based in whole or in part by reference to the Company’s common stock) (collectively, “awards”). ISOs may be granted only to the Company’s employees, including the Company’s officers, and the employees of any parent or subsidiary. All other awards may be granted to the Company’s employees, including the Company’s officers, the Company’s non-employee directors and consultants, and the employees and consultants of the Company’s affiliates. Participants must be natural persons who render bona fide services not in connection with the offer and sale of securities in a capital-raising transaction.

Stock Option and SAR Activity

A summary of stock option and SAR activity for the three months ended March 31, 2019 is as follows (in millions, except share amounts which are reflected in thousands, per share amounts, and years):



	SARs Outstanding Number of SARs		Options Outstanding Number of Shares		Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value
As of December 31, 2018	758		42,936		$	9.22	5.74	$	1,456
Awards granted	53		250		$	42.52
Awards exercised	—		(677	)	$	3.01
Awards forfeited	(8	)	(43	)	$	32.10
As of March 31, 2019	803		42,466		$	9.51	5.51	$	1,808
Vested and expected to vest as of March 31, 2019	621		35,337		$	4.19	5.14	$	1,694
Exercisable as of March 31, 2019	621		36,245		$	4.95	5.22	$	1,709

The total intrinsic value of stock options exercised during the three months ended March 31, 2018 and 2019, was $240 million and $27 million, respectively.

RSU Activity

The following table summarizes the activity related to the Company’s RSUs for the three months ended March 31, 2019. For purposes of this table, vested RSUs represent the shares for which the service condition had been fulfilled as of March 31, 2019 (in thousands, except per share amounts):



	Number of Shares		Weighted-Average Grant-Date Fair Value per Share
Unvested and outstanding as of December 31, 2018	75,835		$	37.20
Granted	31,476		$	42.52
Vested	(8,694	)	$	34.35
Canceled	(1,713	)	$	23.84
Unvested and outstanding as of March 31, 2019	96,904		$	39.42
Vested and outstanding as of March 31, 2019	71,307		$	28.93

Stock-Based Compensation Expense

Stock-based compensation expense is allocated based on the cost center to which the award holder belongs. The following table summarizes total stock-based compensation expense by function for the three months ended March 31, 2018 and 2019 (in millions):



	Three Months Ended March 31,
	2018		2019
Operations and support	$	5	$	1
Sales and marketing	4		1
Research and development	6		3
General and administrative	48		6
Total	$	63	$	11

As of March 31, 2019, there was $65 million of unamortized compensation costs related to all unvested awards for which vesting is not contingent on a qualifying event. The unamortized compensation costs are expected to be recognized over a weighted-average period of approximately 2.4 years.

The tax benefits recognized for stock-based compensation arrangements were not material during the three months ended March 31, 2018 and 2019, respectively.

The weighted-average grant-date fair values of stock options and SARs granted to employees for the three months ended March 31, 2018 and 2019 were $12.38 and $21.93 per share, respectively. The fair value of stock options and SARs granted was determined using the Black-Scholes option pricing model with the following weighted-average assumptions:



	Three Months Ended March 31,
	2018		2019
Expected term (in years)	5.7		5.9
Risk-free interest rate	2.7	%	2.3	%
Expected volatility	32.6	%	34.9	%
Expected dividend yield	—	%	—	%

The weighted-average grant-date fair values of Performance Awards with market-based targets for the three months ended March 31, 2018 and 2019 were $15.68 and $18.20 per share, respectively. The weighted-average derived service periods for Performance Awards with market-based targets for the three months ended March 31, 2018 and 2019 were 3.83 and 2.12 years, respectively. The fair value of Performance Awards with market-based targets granted was determined using a Monte Carlo model with the following weighted-average assumptions:



	Three Months Ended March 31,
	2018		2019
Risk-free interest rate	2.8	%	2.7	%
Expected volatility	39.0	%	39.0	%
Expected dividend yield	—	%	—	%

The Company has granted RSAs, RSUs, SARs, and stock options that vest only upon the satisfaction of both time-based service and performance-based conditions. As of March 31, 2019, no stock-based compensation expense had been recognized for such awards with a performance condition based on the occurrence of a qualifying event (such as an IPO), as such qualifying event was not probable. The total unrecognized stock-based compensation expense relating to these awards as of March 31, 2019 was $6.2 billion. Of this amount, $3.4 billion relates to awards for which the time-based vesting condition had been satisfied or partially satisfied on that date, calculated using the accelerated attribution method and the grant date fair value of the awards.

The remaining $2.8 billion relates to awards for which the time-based vesting condition had not yet been satisfied as of March 31, 2019. This includes $62 million of unrecognized stock-based compensation expense for awards with specified performance metrics to be satisfied in addition to a qualifying event. The unrecognized stock-based compensation expense of $2.8 billion would be recognized over the remaining service period after the occurrence of a qualifying event.

2019 Employee Stock Purchase Plan

In March 2019, the Company’s board of directors adopted the Company’s Employee Stock Purchase Plan (“ESPP”), and in April 2019, the Company’s stockholders approved its ESPP. The ESPP became effective on May 9, 2019, the date of the underwriting agreement between the Company and the underwriters for the IPO. There are 25 million shares of common stock reserved for issuance under the ESPP.

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Note 11 - Income Taxes The Company computes its quarterly income tax expense/(benefit) by using a forecasted annual effective tax rate and adjusts for any discrete items arising during the quarter. The Company recorded an income tax expense of $576 million and $19 million for the three months ended March 31, 2018 and 2019, with an effective tax rate of 13% and (2)%, respectively. During the three months ended March 31, 2018, income tax expense was primarily driven by deferred U.S. tax expense related to the Company’s investment in Didi and Grab, deferred China tax related to the Company’s investment in Didi, and to a lesser extent, the benefit of U.S. losses and current tax on foreign earnings. During the three months ended March 31, 2019, income tax expense is primarily driven by current tax on foreign earnings, partially offset by the benefit of U.S. losses. The primary differences between the effective tax rate and the federal statutory tax rate are due to the valuation allowance on the Company’s U.S. and Netherlands’ deferred tax assets and foreign tax rate differences. In March 2019, the Company initiated a series of transactions resulting in changes to its international legal structure, including a redomiciliation of a subsidiary to the Netherlands and a transfer of certain intellectual property rights among wholly owned subsidiaries, primarily to align its structure to its evolving operations. The redomiciliation resulted in a step-up in the tax basis of intellectual property rights and a correlated increase in foreign deferred tax assets in an amount of $6.1 billion, net of a reserve for uncertain tax positions of$1.3 billion. Based on available objective evidence, management believes it is not more-likely-than-not that these additional foreign deferred tax assets will be realizable as of March 31, 2019 and, therefore, are offset by a full valuation allowance to the extent not offset by reserves from uncertain tax positions. During the three months ended March 31, 2019, the amount of gross unrecognized tax benefits increased by $1.3 billion, of which substantially all, if recognized, would not affect the annual effective tax rate as these unrecognized tax benefits would increase deferred tax assets that would be subject to a full valuation allowance. The Company is subject to taxation in the U.S. and various state and foreign jurisdictions. The Company is currently under a federal income tax examination by the Internal Revenue Service (“IRS”) for tax years 2013 and 2014. The Company is also under examination by various state and foreign tax authorities. The Company believes that adequate amounts have been reserved in these jurisdictions. To the extent the Company has tax attribute carryforwards, the tax years in which the attribute was generated may still be adjusted upon examination by federal, state or foreign tax authorities to the extent utilized in a future period. For the Company’s major tax jurisdictions, the tax years 2010 through 2019 remain open; the major tax jurisdictions are U.S., Brazil, Netherlands, Mexico, United Kingdom, Australia, Singapore, and India. Although the timing of the resolution and/or closure of audits is highly uncertain, it is reasonably possible that the balance of gross unrecognized tax benefits could significantly change in the next 12 months. Given the number of years remaining subject to examination and the number of matters being examined, the Company is unable to estimate the full range of possible adjustments to the balance of gross unrecognized tax benefits. The Company does expect the gross amount of unrecognized tax benefits to be reduced within the next twelve months by at least $141 million, which is related to ongoing matters with tax authorities regarding the Company’s transfer pricing positions. In the event the Company experiences an ownership change within the meaning of Section 382 of the Internal Revenue Code (“IRC”), the Company’s ability to utilize net operating losses, tax credits and other tax attributes may be limited. The most recent analysis of the Company’s historical ownership changes was completed through December 31, 2018. Based on the analysis, the Company does not anticipate a current limitation on the tax attributes. As of March 31, 2019, the Company does not expect any impact on its ability to utilize existing tax attributes.

Net Income (Loss) Per Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Net Income (Loss) Per Share

Note 12 - Net Income (Loss) Per Share

The following table sets forth the computation of basic and diluted net income (loss) per share attributable to common stockholders (in millions, except share amounts which are reflected in thousands, and per share amounts):



	Three Months Ended March 31,
	2018			2019
Basic net income (loss) per share:
Numerator
Net income (loss)	$	3,748		$	(1,016	)
Less: net loss attributable to redeemable non-controlling interest, net of tax	—			4
Less: noncumulative dividends to preferred stockholders	(1,069		)	—
Less: undistributed earnings to participating securities	(1,803		)	—
Net income (loss) attributable to common stockholders	$	876		$	(1,012	)
Denominator
Basic weighted-average common stock outstanding	437,065			453,543
Basic net income (loss) per share attributable to common stockholders	$	2.00		$	(2.23	)
Diluted net income (loss) per share:
Numerator
Net income (loss) attributable to common stockholders	$	876		$	(1,012	)
Add: Change in fair value of MLU B.V. put/call feature	—			(12		)
Add: noncumulative dividends to preferred stockholders	—			—
Diluted net income (loss) attributable to common stockholders	$	876		$	(1,024	)
Denominator
Number of shares used in basic net income (loss) per share computation	437,065			453,543
Weighted-average effect of potentially dilutive securities:
Common stock subject to a put/call feature	653			76
Stock options	35,729			—
RSUs to settle fixed monetary awards	1,617			—
Other	89			—
Diluted weighted-average common stock outstanding	475,153			453,619
Diluted net income (loss) per share attributable to common stockholders	$	1.84		$	(2.26	)

On May 14, 2019, the Company completed its IPO, in which it issued and sold 180 million shares of its common stock at a price of $45.00 per share. On that date, all of the Company’s outstanding redeemable convertible preferred stock automatically converted into 905 million shares of common stock. These shares will be included in the Company’s issued and outstanding common stock starting on that date. Refer to Note 17 - Subsequent Events for further information.

The following potentially dilutive outstanding securities as of March 31, 2018 and 2019 were excluded from the computation of diluted net income (loss) per share because their effect would have been anti-dilutive for the periods presented, or issuance of such shares is contingent upon the satisfaction of certain conditions which were not satisfied by the end of the period (in thousands):



	Three Months Ended March 31,
	2018	2019
Redeemable convertible preferred stock	894,060	904,530
Convertible notes	198,484	202,733
Stock options	7,654	42,466
Restricted common stock with performance condition	955	1,939
Common stock subject to repurchase	10,058	1,570
Warrants to purchase redeemable convertible preferred stock	1,585	150
SARs	867	803
RSUs to settle fixed monetary awards	1,066	999
RSUs	116,973	168,210
Warrants to purchase common stock	178	187
Total	1,231,880	1,323,587

Segment Information and Geographic Information

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Segment Information and Geographic Information

Note 13 - Segment Information and Geographic Information

The Company operates its business as two operating and reportable segments: Core Platform and Other Bets. The Company determined its operating segments based on how the chief operating decision maker (“CODM”) manages the business, allocates resources, makes operating decisions and evaluates operating performance. The Company’s operating performance measure is contribution profit (loss). The CODM does not evaluate operating segments using asset information. Contribution profit (loss) is defined as revenue less the following expenses: cost of revenue, operations and support, sales and marketing, and general and administrative and research and development expenses associated with the Core Platform and Other Bets segments. Contribution profit (loss) also excludes any non-cash items or items that management does not believe are reflective of the Company’s ongoing core operations (as shown in the table below). Included in the reconciliation below are expenses associated with research and development activities that are not directly attributable to the Core Platform and Other Bets segments: Advanced Technologies Group (“ATG”) and Other Technology Programs. ATG includes research and development expenses associated with developing autonomous vehicle technology. Other Technology Programs includes research and development expenses associated with developing all other next-generation technologies.

The following table provides information about the Company’s segments and a reconciliation of the total segment contribution profit (loss) to loss from operations (in millions):



	Three Months Ended March 31,
	2018			2019
Contribution profit (loss):
Core Platform	$	427		$	(117	)
Other Bets	(20		)	(71		)
Total segment contribution profit (loss)	407			(188		)
Reconciling items:
Research and development expenses related to ATG and Other Technology Programs⁽¹⁾	(117		)	(97		)
Unallocated research and development and general and administrative expenses^{(1), (2)}	(468		)	(584		)
Depreciation and amortization	(88		)	(146		)
Stock-based compensation expense	(63		)	(11		)
Asset impairment/loss on sale of assets	(32		)	(8		)
Acquisition and financing related expenses	(15		)	—
Impact of 2018 Divested Operations^{(1), (3)}	(102		)	—
Loss from operations	$	(478	)	$	(1,034	)

⁽¹⁾ Excluding stock-based compensation expense.

⁽²⁾ Unallocated research and development expenses include costs that are not directly attributable to the Core Platform and Other Bets segments. These include mapping and payment technologies and support and development of the internal technology infrastructure. Unallocated general and administrative expenses include certain shared costs such as finance, accounting, tax, human resources, information technology and legal costs. The Company’s allocation methodology is periodically evaluated and may change.

⁽³⁾ Defined as the Company’s 2018 operations in (i) Southeast Asia prior to the sale of those operations to Grab and (ii) Russia/CIS prior to the formation of the Company’s Yandex.Taxi joint venture.

Geographic Information

Revenue by geography is based on where the trip was completed or meal delivered. The following table sets forth revenue by geographic area for the three months ended March 31, 2018 and 2019 (in millions):



	Three Months Ended March 31,
	2018		2019
United States	$	1,330	$	1,757
Brazil	276		209
All other countries	978		1,133
Total revenue	$	2,584	$	3,099

Revenue from external customers grouped by offerings is included in Note 2 - Revenue.

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 14 - Commitments and Contingencies Purchase Commitments The Company has commitments for network and cloud services, background checks, and other items in the ordinary course of business with varying expiration terms through 2021. These amounts are determined based on the non-cancelable quantities or termination amounts to which the Company is contractually obligated. As of March 31, 2019, there were no material changes to the Company’s purchase commitments disclosed in the financial statements included in the Prospectus. Contingencies From time to time, the Company may be a party to various claims, non-income tax audits and litigation in the normal course of business. As of December 31, 2018 and March 31, 2019, the Company had recorded aggregate liabilities of $1.1 billion and $1.2 billion, respectively, in accrued and other current liabilities on the condensed consolidated balance sheets for all of its legal, regulatory and non-income tax matters that were probable and reasonably estimable. The Company is currently party to various legal and regulatory matters that have arisen in the normal course of business and include, among others, alleged independent contractor misclassification claims, Fair Credit Reporting Act (“FCRA”) claims, background check violations, consumer and driver class actions relating to pricing and advertising, unfair competition matters, intellectual property disputes, employment discrimination and other employment-related claims, Telephone Consumer Protection Act (“TCPA”) cases, Americans with Disabilities Act (“ADA”) cases, data and privacy matters, and other matters. With respect to the Company’s outstanding legal and regulatory matters, based on its current knowledge, the Company believes that the amount or range of reasonably possible loss will not, either individually or in the aggregate, have a material adverse effect on the Company’s business, financial position, results of operations, or cash flows. However, the outcome of such legal matters is inherently unpredictable and subject to significant uncertainties. O’Connor, et al., v. Uber Technologies, Inc. and Yucesoy v. Uber Technologies, Inc., et al. O’Connor and Yucesoy are two putative class actions that assert various independent contractor misclassification claims brought on behalf of certain Driver Partners in California and Massachusetts, respectively. The two cases were consolidated and both are pending in the United States District Court for the Northern District of California. Filed on August 16, 2013 in the United States District Court for the Northern District of California, the O’Connor action is a class action against the Company on behalf of all Driver Partners who contracted with the Company in California and seeks damages for tips and business expense reimbursement based on alleged independent contractor misclassification and unfair competition. The O’Connor action was stayed in the trial court pending the outcome of appeals before the Ninth Circuit Court of Appeals regarding the trial court’s orders denying the Company’s motions to compel arbitration, order certifying the class action, and order enjoining the Company’s enforcement of its arbitration agreement. The Ninth Circuit issued its rulings on those appeals on September 25, 2018, finding that the Company’s arbitration agreements were enforceable and accordingly, decertified the O’Connor class and remanded the case to the district court for further proceedings. Filed on June 2, 2014 in the Massachusetts Suffolk County Superior Court, the Yucesoy action is a class action against the Company on behalf of all Driver Partners in Massachusetts and seeks damages based on independent contractor misclassification, tips law violations and tortious interference with contractual and/or advantageous relations. Plaintiffs filed an amended complaint in the Yucesoy action on March 30, 2018 adding new class representatives, to which the Company filed a motion to compel arbitration and/or dismiss the action on April 26, 2018. On March 11, 2019, the parties entered into a Settlement Agreement which provides that the Company will pay $20 million to settle the O’Connor and Yucesoy actions. The proposed settlement does not require the Company to start classifying Driver Partners as employees in California or Massachusetts and does not include those Driver Partners who are subject to arbitration. Plaintiffs filed a motion with the United States District Court for the Northern District of California seeking court approval of the settlement agreement. The motion for preliminary approval of the parties’ settlement agreement was heard on March 21, 2019, and preliminary approval was granted subject to certain conditions. The final approval hearing is set for July 18, 2019. In May 2019, agreements were reached with certain Driver Partners in California and Massachusetts bound by arbitration to resolve similar classification claims. Refer to Note 17 - Subsequent Events for further information. State Unemployment Taxes In December 2016, following an audit opened in 2014 investigating whether Driver Partners were independent contractors or employees, the Company received a Notification of Assessment from the Employment Development Department, State of California, for payroll tax liabilities. The notice retroactively imposed various payroll tax liabilities on the Company, including unemployment insurance, employment training tax, state disability insurance, and personal income tax. The Company has filed a petition with an administrative law judge of the California Unemployment Insurance Appeals Board appealing the assessment. Google v. Levandowski & Ron; Google v. Levandowski On October 28, 2016, Google filed arbitration demands against each of Anthony Levandowski and Lior Ron, former employees of Google, alleging breach of their respective employment agreements with Google, fraud and other state law violations (due to soliciting Google employees and starting a new venture to compete with Google’s business in contravention of their respective employment agreements). Google seeks damages, injunctive relief, and restitution. The arbitration hearing was held from April 30 to May 11, 2018. On March 26, 2019, the arbitration panel issued an interim award, finding against each of Google’s former employees and awarding $127 million against Anthony Levandowski and $1 million for which both Anthony Levandowski and Lior Ron are jointly and severally liable. Pursuant to a contractual obligation, Uber is indemnifying both employees with respect to certain claims. Whether Uber is ultimately responsible for such indemnification, however, depends on the exceptions and conditions set forth in the indemnification agreement. Uber is not a party to either of these arbitrations. Taiwan Regulatory Fines Prior to the Company adjusting and re-launching its operating model in April 2017 to a model where government-approved rental companies provide transport services to Riders, Driver Partners in Taiwan and Uber Taiwan have been fined by Taiwan’s Ministry of Transportation and Communications in significant numbers across Taiwan. On January 6, 2017, a new Highways Act came into effect in Taiwan which increased maximum fines from New Taiwan Dollar (“NTD”) 150,000 to NTD 25 million per offense. The Company suspended its service in Taiwan from February 10, 2017 to April 12, 2017, but a number of these fines were issued to Uber Taiwan in connection with rides that took place in January and February 2017 prior to the suspension. These fines have remained outstanding while Uber appeals the tickets through the courts. Beginning in July 2018, the Taiwan Supreme Court issued a number of positive rulings in which it rejected the government’s approach of issuing one ticket per ride. The Taiwan government continues to appeal these rulings to the Supreme Court. Copenhagen Criminal Prosecution In May 2017, the Danish police announced that they would use tax data about Driver Partners obtained from the Dutch tax authorities to prosecute Driver Partners for unlicensed taxi traffic. The tax data covers calendar years 2015 and prior. The prosecutor indicted four Driver Partners as test cases which have been heard by the Copenhagen City Court, the Appeal Court and finally the Supreme Court. In addition, on October 6, 2017, the Company has been preliminary charged with aiding and abetting illegal taxi traffic in 2015. In September 2018, the Danish Supreme Court ruled on these test cases that the Driver Partners were carrying out illegal taxi operations and fined them in the total amount of their earnings from performing ridesharing services. The Court also confirmed that the use of the relevant tax data obtained from the Dutch tax authorities was validly used as evidence in the prosecutions and was used to assess the fines payable. In January 2018, the Company received another request from the Danish tax authorities through the Dutch tax authorities to disclose tax data about Driver Partners for years 2016 and 2017. Such tax data for years 2016 to 2017 has subsequently been provided by the Company to the Danish tax authorities. On May 29, 2018, the Company received another set of indictment papers from the Danish prosecutor. On February 19, 2019, the Company was informed by the Danish prosecutor that it has issued a request for legal aid to the Danish prosecutor to serve additional indictment papers, relating to the Company’s activity in Denmark in 2016 and 2017. On May 13, 2019, the Company was notified by the Dutch tax authorities that data related to the Company’s activity in Denmark in 2016 and 2017 could not be used by Danish authorities for the purpose of attempting to establish fraud in connection with taxi licenses. The Company has not operated these services in Denmark since 2017 and currently does not have operations in Denmark. Malden Transportation v. Uber Technologies, Inc. Seven consolidated actions were filed in the United District Court for the District of Massachusetts by taxi medallion owners Malden Transportation, Inc., Anoush Cab, Inc., Dot Ave Cab, Inc., Gill & Gill, Inc., Max Luc Taxi, Inc., Sycoone Taxi, Inc., Taxi Maintenance, Inc. in late 2016 and early 2017 against the Company alleging unfair competition violations (on the grounds that the Company failed to comply with local taxi laws), as well as state and federal antitrust violations (on the grounds that the Company prices trips below cost in order to achieve a monopoly). Antitrust claims were dismissed, but the unfair competition claims remain. The parties have completed fact and expert discovery. On May 15, 2019, Uber reached a tentative settlement with the plaintiffs in six of the seven actions, subject to negotiation of specific terms and execution of a settlement agreement. The Company currently anticipates that trial of the seventh action (Anoush Cab, Inc.) will proceed on July 15, 2019. A pre-trial conference is currently set for July 10, 2019. Swiss Social Security Reclassification Several Swiss government bodies currently classify Driver Partners as employees of Uber Switzerland for social security purposes. A number of such decisions have been made by these governmental bodies. The Company is challenging each of them. The Cantonal Court of Zurich issued a ruling with regard to certain test cases on July 20, 2018. The court canceled the decisions on the grounds that certain decisions were made against the Company’s Swiss local entity without proof that there is a contractual relationship between the Company’s Swiss local entity and the Driver Partners (who actually contract with Uber B.V.). This ruling was not appealed and the court is investigating who the employer is by asking the Company questions about the relationships between the Driver Partners and the various Company entities. The Company is cooperating with these investigations. The Company’s chances of success on the merits are still uncertain and any possible loss or range of loss cannot be estimated. Non-Income Tax Matters The Company accounts for contingencies related to non-income tax matters and is under audit by various domestic and foreign tax authorities with regard to such matters. The subject matter of these contingent liabilities and non-income tax audits primarily arises from the Company’s transactions with its Driver Partners, as well as the tax treatment of certain employee benefits and related employment taxes. In jurisdictions with disputes connected to transactions with Driver Partners, disputes involve the applicability of transactional taxes (such as sales, value added and similar taxes) to services provided, as well as the applicability of withholding tax on payments made to such Driver Partners. The Company believes these disputes and audits are without merit and is defending itself vigorously. Due to the inherent complexity and uncertainty of these matters and judicial processes in certain jurisdictions, the final outcomes may exceed the estimated liabilities recorded. Other Legal and Regulatory Matters The Company has been subject to various government inquiries and investigations surrounding the legality of certain of the Company’s business practices, compliance with global regulatory requirements, such as antitrust and Foreign Corrupt Practices Act requirements, data protection and privacy laws, and the infringement of certain intellectual property rights. The Company has investigated many of these matters and is implementing a number of recommendations to its managerial, operational and compliance practices, as well as strengthening its overall governance structure. In many cases, the Company is unable to predict the outcomes and implications of these inquiries and investigations on the Company’s business which could be time consuming, costly to investigate and require significant management attention. Furthermore, the outcome of these inquiries and investigations could negatively impact the Company’s business, reputation, financial condition and operating results, including possible fines and penalties and requiring changes to operational activities and procedures. Indemnifications In the ordinary course of business, the Company often includes standard indemnification provisions in its arrangements with third parties. Pursuant to these provisions, the Company may be obligated to indemnify such parties for losses or claims suffered or incurred in connection with its activities or non-compliance with certain representations and warranties made by the Company. In addition, the Company has entered into indemnification agreements with its officers, directors, and certain current and former employees, and its certificate of incorporation and bylaws contain certain indemnification obligations. It is not possible to determine the maximum potential loss under these indemnification provisions / obligations because of the unique facts and circumstances involved in each particular situation.

Variable Interest Entities (VIEs)

3 Months Ended

Mar. 31, 2019

Variable Interest Entity [Abstract]

Variable Interest Entities (VIEs)

Note 15 - Variable Interest Entities ("VIEs")

Consolidated VIE

As of December 31, 2017, the Company consolidated a VIE entity as it had an option to acquire all the outstanding membership interests in the entity and had the obligation to fully fund the entity’s operations. In 2018, the Company exercised its option. Under an amended agreement, and upon satisfaction of certain closing conditions associated with exercising its option, the Company created a new majority-owned subsidiary, Uber Freight. Refer to Note 16 - Non-Controlling Interest for further information. Total assets included on the condensed consolidated balance sheets for this VIE as of December 31, 2018 and March 31, 2019 were $115 million and $119 million, respectively. Total liabilities included on the condensed consolidated balance sheets for this VIE as of December 31, 2018 and March 31, 2019 were not material.

Unconsolidated VIE

Mission Bay 3 & 4

The Mission Bay 3 & 4 joint venture (“JV”) refers to Event Center Office Partners, LLC (“ECOP”), a joint venture entity established in March 2018, by Uber and two companies (“LLC Partners”) to manage the operation of two office buildings owned by two ECOP wholly-owned subsidiaries. The Company contributed $136 million cash in exchange for a 45% interest in ECOP. Each of the two LLC Partners owns 45% and 10%, respectively. The amount of contributed cash was recorded as an investment for $136 million as of March 31, 2019. The remaining construction costs will be funded through a construction loan obtained by ECOP where the Company together with the two LLC Partners guarantee payments and performance of the loan when it becomes due and any payment of costs incurred by the lender under limited situations. The maximum collective guarantee liability is up to $50 million.

The Company evaluated the nature of its investment in ECOP and determined that ECOP is a VIE during the construction period; however, the Company is not the primary beneficiary as decisions are made jointly between parties and therefore does not have the power to direct activities that most significantly impact the VIE. The Company will reevaluate if ECOP meets the definition of a VIE upon specific reconsideration events, including completion of construction.

The maximum exposure to loss represents the potential loss recognized by the Company relating to these unconsolidated entities. The Company believes that its maximum exposure to loss is limited because it is a member of the limited liability company. The Company’s maximum exposure to loss differs from the carrying value of the variable interests. The maximum exposure to loss is dependent on the nature of the variable interests in the VIE and is limited to the investment balances and notional amounts of guarantees. As of December 31, 2018 and March 31, 2019, the carrying amount of assets and liabilities recognized on the condensed consolidated balance sheets related to the Company’s interests in unconsolidated VIEs and the Company’s maximum exposure to loss relating to unconsolidated VIEs was as follows (in millions):



	As of
	December 31, 2018		March 31, 2019
Investment	$	78	$	136
Additional cash contribution	58		—
Limited guarantee	50		50
Maximum exposure to loss	$	186	$	186

Uber has significant influence over ECOP and accounts for its investment in ECOP under the equity method. No equity earnings have been recognized as of March 31, 2019, since the sole activity of the ECOP consists of construction of the assets and costs incurred are capitalized. Once construction is complete, at each reporting period, the Company will adjust the carrying value of its investment to reflect its proportionate share of ECOP’s income or loss, and any impairments, with a corresponding credit or debit, respectively, to loss from equity method investment, net of tax in the condensed consolidated statements of operations. As of March 31, 2019, the Company determined that no impairment of its equity method investments existed.

Non-Controlling Interest	3 Months Ended
Non-Controlling Interest	Mar. 31, 2019
Noncontrolling Interest [Abstract]
Non-Controlling Interest	Note 16 - Non-Controlling Interest Non-controlling interest is classified in mezzanine equity as it is redeemable on an event that is not solely in the control of the Company. The non-controlling interest is redeemable at fair value beginning at future dates at the holders’ option and prior to the occurrence of certain events. The non-controlling interest is not remeasured to fair value because it is currently not probable that the non-controlling interest will become redeemable because of the likelihood of occurrence of certain events that would prevent it from becoming redeemable. If the non-controlling interest becomes probable of being redeemable, the Company will remeasure the non-controlling interest with changes in the carrying value recognized in additional paid-in capital. As of March 31, 2019, the Company owned 89% of the issued and outstanding capital stock of its subsidiary that operates its Uber Freight offering, or 80% on a fully-diluted basis if all shares reserved for issuance under the Company’s Uber Freight employee incentive plan were issued and outstanding. As of March 31, 2019, no equity awards under the Uber Freight employee incentive plan had been granted. As of March 31, 2019, the Company owned 100% of the issued and outstanding capital stock of its subsidiary that operates its JUMP e-bike and e-scooter products, or 81% on a fully-diluted basis if all shares reserved for issuance under its JUMP employee incentive plan were issued and outstanding. As of March 31, 2019, stock options with a service-based vesting condition over four years equaling 11% of the fully-diluted capitalization of the Company’s subsidiary that operates its JUMP e-bike and e-scooter products were granted to certain of the Company’s employees who were former JUMP senior management. The minority stockholders of the Company’s subsidiaries that operate each of its Uber Freight offering and its JUMP e-bike and e-scooter products, including any holders of equity awards issued under the employee equity incentive plans and employees who hold fully vested shares, have put rights to sell certain of their equity interests at fair market value at specified periods of time that terminates upon the earliest of the closing of a liquidation transaction or an IPO of the subsidiary. If the put rights are exercised prior to the Company’s IPO and before the subsidiary’s IPO, the put right would be satisfied in cash. This will result in a decrease in the non-controlling interest outstanding and a decrease to cash. Should the put rights be exercised subsequent to the Company’s IPO, the put rights can be satisfied in either cash, Uber stock, or a combination of cash and Uber stock based upon the Company’s election. In April 2019, the JUMP employee incentive plan was terminated and the JUMP subsidiary became a wholly-owned subsidiary of the Company. All unvested and unexercised equity awards under the terminated JUMP employee incentive plan were canceled. On May 14, 2019, the Company completed its IPO. The Uber Freight put rights were not exercised prior the Company’s IPO. Refer to Note 17 - Subsequent Events for further information on the JUMP employee incentive plan termination and the Company’s IPO. The Company attributes the pro rata share of the Uber Freight and JUMP subsidiaries’ net income or loss to the redeemable non-controlling interests based on the outstanding ownership of the minority shareholders during the period.

Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Note 17 - Subsequent Events ATG Investment In April 2019, the Company entered into a preferred unit purchase agreement with affiliates of SoftBank Vision Fund (“SoftBank”), Toyota Motor Corporation (“Toyota”), and DENSO Corporation (“DENSO” and together with SoftBank and Toyota, the “ATG Investors”). Pursuant to the preferred unit purchase agreement, the ATG Investors will invest an aggregate of $1.0 billion in a newly formed corporate parent entity for the Company’s Advanced Technologies Group (“ATG”) in exchange for preferred units of ATG collectively representing approximately a 14% ownership interest in ATG on a fully diluted basis. The Company agreed to contribute certain of its subsidiaries and all assets and liabilities primarily related to its autonomous vehicle technologies, (excluding liabilities arising from certain indemnification obligations related to the Levandowski arbitration and any remediation costs associated with certain obligations that may arise as a result of the Waymo settlement), in exchange for common units of ATG representing approximately an 86% ownership interest in ATG on a fully diluted basis. The preferred units held by each of the ATG Investors will receive an annual dividend of 4.5%, which will be payable in cash or accrete to the holder of preferred units, at ATG’s election. The closing of the transaction is subject to certain closing conditions and is expected to occur in July 2019. The Company and Softbank also agreed to put and call obligations with respect to SoftBank’s preferred units (priced at the greater of (i) cost plus any accrued and unpaid dividends and (ii) the then fair market value of the preferred units) if ATG has not gone public or been sold as of the seventh anniversary of the closing of the transaction. If the Company is a publicly traded company as of the seventh anniversary of the closing of transaction, the Company has the option to satisfy all, or a portion of, its put and call obligations with shares of its common stock and any remainder will be satisfied in cash. If the Committee on Foreign Investment in the United States blocks or unwinds the ATG Collaboration Agreement (described below) or requires mitigation measures that materially and adversely affect the strategic benefits of the ATG Collaboration Agreement, the ATG Investors will each have the right to require ATG to redeem some or all of its preferred units at a price equal to its respective initial investment amount, which redemption(s) may be satisfied in cash or in exchange for shares of the Company’s common stock if a cash redemption would have a material and adverse impact on ATG. In addition to the unit purchase agreement, the Company has entered into a joint collaboration agreement with Toyota, DENSO, and ATG with respect next-generation self-driving hardware and the development of self-driving vehicles leveraging technology from each of the parties (the “ATG Collaboration Agreement”), which will be effective as of the closing of the transaction. Pursuant to the ATG Collaboration Agreement, ATG and Toyota will agree on development plans, and thereafter Toyota will contribute to ATG up to an aggregate of $300 million in cash over six semi-annual installments to fund the ongoing activities contemplated under the ATG Collaboration Agreement. Driver Appreciation Reward In April 2019, the Company paid approximately $300 million one-time incentive payment to Driver Partners who met certain criteria. The incentive payment was accounted for as a Driver incentive in the second quarter of 2019. PayPal, Inc. (“PayPal”) Private Placement On May 16, 2019, the Company closed a private placement by PayPal, Inc. in which it issued and sold 11 million shares of its common stock at a purchase price of $45.00 per share and received aggregate proceeds of $500 million. Additionally, PayPal and the Company agreed to extend their global partnership including a commitment to jointly explore certain commercial collaborations. Termination of JUMP’s 2018 Equity Incentive Plan (“JUMP Plan”) In April 2019, the JUMP employee incentive plan was terminated and the JUMP subsidiary became a wholly-owned subsidiary of the Company. All unvested and unexercised equity awards under the terminated JUMP employee incentive plan were canceled. Certain JUMP employees who held such unvested and unexercised equity awards under the terminated JUMP employee incentive plan received grants of the Company’s RSUs pursuant to the 2013 Plan. The fair value of the RSU grants and the impact on the Company’s financial statements were not material. Agreements to Resolve Arbitration Demands related to O’Connor, et al., v. Uber Technologies, Inc. and Yucesoy v. Uber Technologies, Inc., et al. In May 2019, the Company reached agreements to resolve independent contractor misclassification claims of Driver Partners in California and Massachusetts that have filed (or expressed an intention to file) arbitration demands. Under the agreements, certain Driver Partners are eligible for settlement payments, subject to a threshold number of the covered Driver Partners entering into individual settlement agreements. The Company anticipates the aggregate amount of payments to Driver Partners under these individual settlement agreements, together with attorneys’ fees, will fall within an approximate range of $146 million to $170 million. As of December 31, 2018 and March 31, 2019, the Company had reserved $132 million for this matter. Initial Public Offering On May 14, 2019, the Company closed its IPO, in which it issued and sold 180 million shares of its common stock. The price was $45.00 per share. The Company received net proceeds of approximately $8.0 billion from the IPO after deducting underwriting discounts and commissions of $106 million and offering expenses. Upon closing of the IPO: i) all shares of the Company’s outstanding redeemable convertible preferred stock automatically converted into 905 million shares of common stock; ii) holders of the 2021 Convertible Notes and the 2022 Convertible Notes elected to convert all outstanding notes into 94 million shares of common stock; and, iii) an outstanding warrant which became exercisable upon the closing of the IPO was exercised to purchase 0.2 million shares of common stock. In addition, the Company will recognize a gain of approximately $350 million upon conversion of the 2021 and 2022 Convertible Notes during the second quarter of 2019. Total outstanding shares after closing of the IPO and after conversion of all shares of the Company’s outstanding redeemable convertible preferred stock, 2021 Convertible Notes and 2022 Convertible Notes, and the exercise of the common stock warrant were approximately 1.6 billion at May 14, 2019. The underwriters have an over-allotment option, exercisable for 30 days from the date of the Prospectus, to purchase up to 27 million additional shares of common stock from the selling stockholders identified in the Prospectus at the public offering price, less underwriting discounts and commissions. The underwriters may exercise this option solely for the purpose of covering over-allotments, if any, made in connection with the offering of the shares of common stock offered by the Prospectus. Upon the May 9, 2019 effective date, the Company recognized $3.6 billion of stock-based compensation expense. To meet the related tax withholding requirements, the Company withheld 29 million of the 76 million shares of common stock issued. Based on the IPO public offering price of $45.00 per share, the tax withholding obligation was $1.3 billion.

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. The condensed consolidated balance sheet as of December 31, 2018 included herein was derived from the audited consolidated financial statements as of that date but does not include all of the information and notes required by GAAP for complete financial statements. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements and the related notes thereto as of and for the year ended December 31, 2018, included in the Company’s final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended (“the Securities Act”), on May 13, 2019 (“the Prospectus”). In the opinion of management, these financial statements include all adjustments, which are of a normal recurring nature, necessary for a fair statement of the financial position, results of operations, cash flows and the change in equity for the periods presented. Other than described below, there have been no changes to the Company’s significant accounting policies described in the Prospectus that have had a material impact on the Company’s condensed consolidated financial statements and related notes, except for the adoption of the new accounting standard related to lease accounting.
Basis of Consolidation	Basis of Consolidation The condensed consolidated financial statements of the Company include the accounts of the Company and entities consolidated under the variable interest and voting models. All intercompany balances and transactions have been eliminated. Refer to Note 15 - Variable Interest Entities ("VIEs") for further information.
Use of Estimates	Use of Estimates The preparation of the Company’s unaudited condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions, which affect the reported amounts in the financial statements and accompanying notes. Estimates are based on historical experience, where applicable, and other assumptions which management believes are reasonable under the circumstances. On an ongoing basis, the Company evaluates its estimates, including those related to the incremental borrowing rate (“IBR”) applied in lease accounting, accounts receivable allowances, fair values of investments and other financial instruments, useful lives of amortizable long-lived assets and intangible assets, stock-based compensation, income and non-income taxes, insurance reserves, and contingent liabilities. These estimates are inherently subject to judgment and actual results could differ from those estimates.
Leases	Significant Accounting Policies - Leases The Company accounts for leases in accordance with ASC 842, Leases (“ASC 842”), which requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. The Company adopted ASC 842 along with all subsequent ASU clarifications and improvements that are applicable to the Company, on January 1, 2019, using the modified retrospective transition method and used the effective date as the date of initial application. Consequently, financial information is not updated and the disclosures required under ASC 842 are not provided for dates and periods before January 1, 2019. ASC 842 provides a number of optional practical expedients in transition. The Company elected the “package of practical expedients,” which permits the Company not to reassess under ASC 842 its prior conclusions about lease identification, lease classification and initial direct costs. The Company also made a policy election not to separate non-lease components from lease components, therefore, it will account for lease component and the non-lease components as a single lease component. The Company determines if a contract contains a lease based on whether it has the right to obtain substantially all of the economic benefits from the use of an identified asset and whether it has the right to direct the use of an identified asset in exchange for consideration, which relates to an asset which the Company does not own. Right of use (“ROU”) assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets are recognized as the lease liability, adjusted for lease incentives received. Lease liabilities are recognized at the present value of the future lease payments at the lease commencement date. The interest rate used to determine the present value of the future lease payments is the Company’s incremental borrowing rate (“IBR”), because the interest rate implicit in most of the Company’s leases is not readily determinable. The incremental borrowing rate is a hypothetical rate based on the Company’s understanding of what its credit rating would be. Lease payments may be fixed or variable, however, only fixed payments or in-substance fixed payments are included in the Company’s lease liability calculation. Variable lease payments are recognized in operating expenses in the period in which the obligation for those payments are incurred. The lease term of operating and finance leases vary from less than a year to 76 years. The Company has leases that include one or more options to extend the lease term for up to 14 years as well as options to terminate the lease within one year. The Company’s lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options. Operating leases are included in operating lease right to use assets, operating lease liabilities, current and operating lease liabilities, non-current on the Company’s condensed consolidated balance sheets. Finance leases are included in property and equipment, net, accrued and other current liabilities, and other long-term liabilities on the Company’s condensed consolidated balance sheets.
Recent Accounting Pronouncements	Recently Adopted Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. Upon adoption of the new leasing standard on January 1, 2019, the Company recognized ROU assets of $888 million and lease liabilities of $963 million. The Company reassessed the build-to-suit leases that no longer meet the control-based build-to-suit model and derecognized $392 million in build-to-suit assets, $350 million corresponding financing obligation, and recorded $9 million of deferred tax liability. The initial cash contribution to the Mission Bay 3 & 4 joint venture that was previously reported as a defeasance of a build-to-suit financing obligation of $60 million was derecognized by reclassifying it as an increase to the Mission Bay 3 & 4 equity method investment. The $9 million difference between the total derecognized assets and total derecognized liabilities was recorded in the opening balance of accumulated deficit, net of tax, as of January 1, 2019. In July 2017, the FASB issued ASU 2017-11, “Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception” to simplify the accounting for certain instruments with down round features. The amendments require companies to disregard the down round feature when assessing whether the instrument is indexed to its own stock, for purposes of determining liability or equity classification. Further, companies that provide earnings per share (“EPS”) data will adjust the basic EPS calculation for the effect of the feature when triggered and will also recognize the effect of the trigger within equity. The Company adopted this new standard as of January 1, 2019 and applied the changes retrospectively. The adoption of the new standard did not have a material impact on the Company’s condensed consolidated financial statements. In June 2018, the FASB issued ASU 2018-07, “Improvements to Non-Employee Share-Based Payment Accounting,” which expands the scope of Topic 718, to include share-based payments issued to non-employees for goods or services. The new standard supersedes Subtopic 505-50. The Company adopted the new standard effective January 1, 2019 on a modified retrospective basis. The new standard did not have a material impact on the Company’s condensed consolidated financial statements. Recently Issued Accounting Pronouncements Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” to require the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The standard also amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The standard is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement,” which modifies the disclosure requirements in ASC 820, “Fair Value Measurement” (“ASC 820”). The new standard is effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. An entity is permitted to early adopt any removed or modified disclosures upon issuance of this ASU and delay adoption of the additional disclosures until their effective date. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract,” which aligns the requirements for capitalizing implementation costs incurred in a cloud computing arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use-software. The standard is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements. In October 2018, the FASB issued ASU 2018-17, “Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities,” which amends the guidance for determining whether a decision-making fee is a variable interest and requires organizations to consider indirect interests held through related parties under common control on a proportional basis rather than as the equivalent of a direct interest in its entirety. The standard is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements.
Non-Controlling Interest	Non-controlling interest is classified in mezzanine equity as it is redeemable on an event that is not solely in the control of the Company. The non-controlling interest is redeemable at fair value beginning at future dates at the holders’ option and prior to the occurrence of certain events. The non-controlling interest is not remeasured to fair value because it is currently not probable that the non-controlling interest will become redeemable because of the likelihood of occurrence of certain events that would prevent it from becoming redeemable. If the non-controlling interest becomes probable of being redeemable, the Company will remeasure the non-controlling interest with changes in the carrying value recognized in additional paid-in capital.

Revenue (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

Revenue is presented in the following tables for the three months ended March 31, 2018 and 2019, respectively (in millions):



	Three Months Ended March 31,
	2018		2019
Ridesharing revenue	$	2,180	$	2,376
Uber Eats revenue	283		536
Vehicle Solutions revenue⁽¹⁾	55		10
Other revenue	26		32
Total Core Platform revenue	2,544		2,954
Total Other Bets revenue	40		145
Total revenue	$	2,584	$	3,099



	Three Months Ended March 31,
	2018		2019
United States and Canada	$	1,387	$	1,750
Latin America ("LATAM")	518		450
Europe, Middle East and Africa ("EMEA")	388		487
Asia Pacific ("APAC")	251		267
Total Core Platform revenue	$	2,544	$	2,954

⁽¹⁾ The Company accounts for Vehicle Solutions revenue as an operating lease as defined under ASC 840 for 2018 and ASC 842 in 2019.

Schedule of Remaining Performance Obligation

The Company’s remaining performance obligation is expected to be recognized as follows (in millions):



	Less Than or Equal To 12 Months		Greater Than 12 Months		Total
As of March 31, 2019	$	52	$	74	$	126

Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Marketable and Non-Marketable Securities

The Company’s investments on the condensed consolidated balance sheets consisted of the following as of December 31, 2018 and March 31, 2019 (in millions):



	As of
	December 31, 2018		March 31, 2019
Non-marketable equity securities:
Didi	$	7,953	$	7,953
Other	32		79
Debt securities:
Grab⁽¹⁾	2,328		2,324
Other⁽²⁾	42		40
Investments	$	10,355	$	10,396

⁽¹⁾Recorded at fair value with changes in fair value recorded in other comprehensive income (loss), net of tax.

⁽²⁾Recorded at fair value with changes in fair value recorded in earnings due to the election of the fair value option of accounting for financial instruments.

Schedule of Assets and Liabilities Measured on Recurring Basis

The following table presents the Company’s financial assets and liabilities measured at fair value on a recurring basis based on the three-tier fair value hierarchy (in millions):



	As of December 31, 2018								As of March 31, 2019
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Financial Assets
Cash and cash equivalents:
Money market funds	$	268	$	—	$	—	$	268	$	519	$	—	$	—	$	519
Restricted cash and cash equivalents:
Money market funds	1,237		—		—		1,237		1,246		—		—		1,246
Other current assets:
Other	—		—		—		—		—		—		3		3
Investments:
Debt securities	—		—		2,370		2,370		—		—		2,364		2,364
Total financial assets	$	1,505	$	—	$	2,370	$	3,875	$	1,765	$	—	$	2,367	$	4,132
Financial Liabilities
Accrued and other current liabilities:
Other	$	—	$	—	$	9	$	9	$	—	$	—	$	—	$	—
Other long-term liabilities:
Warrants	—		—		52		52		—		—		8		8
Embedded derivatives	—		—		2,018		2,018		—		—		1,843		1,843
Total financial liabilities	$	—	$	—	$	2,079	$	2,079	$	—	$	—	$	1,851	$	1,851

Schedule of Financial Assets Measured at Fair Value on a Recurring Basis

The following table summarizes the amortized cost, unrealized gains and losses, and fair value of the Company’s financial assets measured at fair value on a recurring basis as of December 31, 2018 and March 31, 2019 (in millions):



	As of December 31, 2018								As of March 31, 2019
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value		Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Investments:
Debt securities	$	2,305	$	65	$	—	$	2,370	$	2,305	$	65	$	(6	)	$	2,364

Schedule of Fair Value Assumptions on Significant Unobservable Inputs

The following table summarizes information about the significant unobservable inputs used in the fair value measurement for the Company’s investment in Grab as of December 31, 2018 and March 31, 2019:

Schedule of Amortized Cost and Fair Value of Debt Security with Contractual Maturity Dates

The following table summarizes the amortized cost and fair value of the Company’s debt security with a stated contractual maturity date as of December 31, 2018 and March 31, 2019 (in millions):



	As of December 31, 2018				As of March 31, 2019
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	—	$	—	$	—	$	—
Due after one year through five years	2,275		2,328		2,275		2,324
Total	$	2,275	$	2,328	$	2,275	$	2,324

Schedule of Reconciliation Using Significant Unobservable Inputs, Assets

The following table presents a reconciliation of the Company’s financial assets measured and recorded at fair value on a recurring basis as of March 31, 2019, using significant unobservable inputs (Level 3) (in millions):



	Debt Securities
Balance as of December 31, 2018	$	2,370
Total net gains (losses)
Included in earnings	(2		)
Included in other comprehensive income (loss)	(4		)
Balance as of March 31, 2019	$	2,364

Schedule of Reconciliation Using Significant Unobservable Inputs, Liabilities

The following table presents a reconciliation of the Company’s financial liabilities measured at fair value as of March 31, 2019 using significant unobservable inputs (Level 3), and the change in fair value recorded in other income (expense), net in the condensed consolidated statements of operations (in millions):



	Warrants			Convertible Debt Embedded Derivative
Balance as of December 31, 2018	$	52		$	2,018
Vesting of share warrants	1			—
Exercise of vested share warrants	(45		)	—
Change in fair value	—			(175		)
Balance as of March 31, 2019	$	8		$	1,843

Schedule of Securities without Readily Determinable Fair Value

The following table summarizes the total carrying value of the Company’s non-marketable equity securities held as of December 31, 2018 and March 31, 2019 including cumulative unrealized upward and downward adjustments made to the initial cost basis of the securities (in millions):



	As of
	December 31, 2018		March 31, 2019
Initial cost basis	$	6,001	$	6,030
Upward adjustments	1,984		2,002
Downward adjustments (including impairment)	—		—
Total carrying value at the end of the period	$	7,985	$	8,032

The following is a summary of unrealized gains and losses from remeasurement (referred to as upward or downward adjustments) recorded in other income (expense), net in the condensed consolidated statements of operations, and included as adjustments to the carrying value of non-marketable equity securities held during the three months ended March 31, 2018 and 2019 based on the selling price of newly issued shares of similar preferred stock to new investors using the common stock equivalent valuation method and adjusted for any applicable differences in conversion rights (in millions):



	Three Months Ended March 31,
	2018		2019
Upward adjustments	$	1,984	$	18
Downward adjustments (including impairment)	—		—
Total unrealized gain for non-marketable equity securities	$	1,984	$	18

Equity Method Investments (Tables)

3 Months Ended

Mar. 31, 2019

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Equity Method Investments

The carrying value of the Company’s equity method investments as of December 31, 2018 and March 31, 2019 (in millions) is as follows:



	As of
	December 31, 2018		March 31, 2019
MLU B.V.	$	1,234	$	1,182
Mission Bay 3 & 4⁽¹⁾	78		138
Equity method investments	$	1,312	$	1,320

⁽¹⁾Refer to Note 15 - Variable Interest Entities ("VIEs") for further information on the Company’s interest in Mission Bay 3 & 4.

Property and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

Components of Property and Equipment, Net

The components of property and equipment, net as of December 31, 2018 and March 31, 2019 were as follows (in millions):



	As of
	December 31, 2018			March 31, 2019
Land	$	67		$	67
Building and site improvements	93			40
Leasehold improvements	315			312
Computer equipment	858			880
Leased computer equipment	288			371
Leased vehicles	34			33
Internal-use software	51			72
Furniture and fixtures	39			39
Dockless e-bikes	10			18
Construction in progress	832			570
Total	2,587			2,402
Less: Accumulated depreciation and amortization	(946		)	(1,077		)
Property and equipment, net	$	1,641		$	1,325

Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Components of lease expense

The components of lease expense were as follows (in millions):



	Three Months Ended March 31, 2019
Lease cost
Finance lease cost:
Amortization of assets	$	36
Interest of lease liabilities	4
Operating lease cost	67
Short-term lease cost	8
Variable lease cost	25
Sublease income	(1		)
Total lease cost	$	139

Supplemental cash flow information related to leases was as follows (in millions):



	Three Months Ended March 31, 2019
Other information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from financing leases	$	3
Operating cash flows from operating leases	52
Financing cash flows from financing leases	41
Right-of-use assets obtained in exchange for lease obligations:
Operating lease liabilities⁽¹⁾	$	474
Finance lease liabilities	83

⁽¹⁾Includes $415 million of ROU assets and operating lease liabilities recognized in the current period for Mission Bay 3 & 4 leases which commenced in the first quarter of 2019.

Leases, Assets and Liabilities

Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate):



	As of March 31, 2019
Operating Leases
Operating lease right-of-use assets	$	1,323
Operating lease liability, current	178
Operating lease liabilities, non-current	1,225
Total operating lease liabilities	$	1,403



	As of March 31, 2019
Finance Leases
Property and equipment, at cost	$	371
Accumulated depreciation	(133		)
Property and equipment, net	$	238
Other current liabilities	$	115
Other long-term liabilities	130
Total finance leases liabilities	$	245



	As of March 31, 2019
Weighted-average remaining lease term
Operating leases	17 years
Finance leases	2 years
Weighted-average discount rate
Operating leases	7.5	%
Finance leases	5.0	%

Maturity of Lease Liabilities, Operating

Maturities of lease liabilities were as follows (in millions):



	As of March 31, 2019
	Operating Leases			Finance Leases
Remainder of 2019	$	169		$	101
2020	210			89
2021	232			63
2022	200			5
2023	169			—
Thereafter	1,974			—
Total undiscounted lease payments	2,954			258
Less: imputed interest	(1,551		)	(13		)
Total lease liabilities	$	1,403		$	245

Maturity of Lease Liabilities, Finance

Maturities of lease liabilities were as follows (in millions):



	As of March 31, 2019
	Operating Leases			Finance Leases
Remainder of 2019	$	169		$	101
2020	210			89
2021	232			63
2022	200			5
2023	169			—
Thereafter	1,974			—
Total undiscounted lease payments	2,954			258
Less: imputed interest	(1,551		)	(13		)
Total lease liabilities	$	1,403		$	245

Future Minimum Payments Related to Financing Obligations under Failed Sale-Leaseback Arrangement

Future minimum payments related to the financing obligations under failed sale-leaseback arrangement as of March 31, 2019 are summarized below (in millions):



	Future Minimum Payments under Failed Sale-Leaseback Arrangements
Fiscal Year Ending December 31,
Remainder of 2019	$	—
2020	2
2021	6
2022	6
2023	6
Thereafter	833
Total	$	853

Long-Term Debt and Revolving Credit Arrangements (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Components of Debt

Components of debt, including the associated effective interest rates were as follows (in millions, except for percentages):



	As of
	December 31, 2018			March 31, 2019			Effective Interest Rate
2016 Senior Secured Term Loan	$	1,124		$	1,121		6.1	%
2018 Senior Secured Term Loan	1,493			1,489			6.2	%
2021 Convertible Notes	1,844			1,867			23.5	%
2022 Convertible Notes	1,030			1,030			13.7	%
2023 Senior Note	500			500			7.7	%
2026 Senior Note	1,500			1,500			8.1	%
Total debt	7,491			7,507
Less: unamortized discount and issuance costs	(595		)	(541		)
Less: current portion of long-term debt	(27		)	(27		)
Total long-term debt	$	6,869		$	6,939

Schedule of Debt Expense

The following table presents the amount of interest expense recognized relating to the contractual interest coupon, amortization of the debt discount and issuance costs, and the IRR payout with respect to the Senior Secured Term Loan, the Convertible Notes, and the Senior Notes for the three months ended March 31, 2018 and 2019 (in millions):



	Three Months Ended March 31,
	2018		2019
Contractual interest coupon	$	32	$	140
Amortization of debt discount and issuance costs	72		53
8% IRR payout	14		17
Total interest expense from long-term debt	$	118	$	210

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Assets and Liabilities Held for Sale (Tables)

3 Months Ended

Mar. 31, 2019

Discontinued Operations and Disposal Groups [Abstract]

Summary of Carrying Value of Assets and Liabilities Classified as Held-for-sale

The following table summarizes the carrying values of the assets and liabilities classified as held for sale as of December 31, 2018 (in millions):



	As of December 31, 2018
Assets held for sale
Cash and cash equivalents	$	34
Accounts receivable, net	20
Prepaid expenses and other current assets	30
Property and equipment, net	322
Total assets held for sale	406

Liabilities held for sale
Accounts payable	2
Accrued liabilities	2
Other current liabilities	7
Total liabilities held for sale	11
Net assets held for sale	$	395

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=109226691&loc=SL51724579-110230

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1474-107760

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5D
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721677-107760

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=109222160&loc=SL51721533-107759

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721659-107760

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721665-107760

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5C
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760

Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5A
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721671-107760

Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 4A
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721663-107760

+ Details

Supplemental Financial Statement Information (Tables)

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets as of December 31, 2018 and March 31, 2019 were as follows (in millions):



	As of
	December 31, 2018		March 31, 2019
Prepaid expenses	$	265	$	252
Other receivables	416		483
Other	179		240
Prepaid expenses and other current assets	$	860	$	975

Schedule of Accrued and Other Current Liabilities

Accrued and other current liabilities as of December 31, 2018 and March 31, 2019 were as follows (in millions):



	As of
	December 31, 2018		March 31, 2019
Accrued legal, regulatory and non-income taxes	$	1,134	$	1,175
Accrued Partner liability	459		725
Accrued professional and contractor services	298		310
Accrued compensation and employee benefits	261		151
Accrued marketing expenses	152		145
Other accrued expenses	160		185
Income and other tax liabilities	157		125
Government and airport fees payable	104		124
Short-term finance lease obligation for computer equipment	110		115
Other	322		369
Accrued and other current liabilities	$	3,157	$	3,424

Other Long-Term Liabilities

Other long-term liabilities as of December 31, 2018 and March 31, 2019 were as follows (in millions):



	As of
	December 31, 2018		March 31, 2019
Convertible debt embedded derivatives (Note 7)	$	2,018	$	1,843
Deferred tax liabilities	1,072		1,068
Financing obligation	436		88
Income tax payable	80		101
Other	466		487
Other long-term liabilities	$	4,072	$	3,587

Schedule of Accumulated Other Comprehensive Income (Loss)

The changes in composition of accumulated other comprehensive income (loss), net of tax, for the three months ended March 31, 2018 and 2019 were as follows (in millions):



	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Available-for-Sale Securities, Net of Tax		Total
Balance as of December 31, 2017	$	(3	)	$	—	$	(3	)
Other comprehensive income (loss) before reclassifications	(7		)	—		(7		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			—		—
Other comprehensive income (loss)	(7		)	—		(7		)
Balance as of March 31, 2018	$	(10	)	$	—	$	(10	)



	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Available-for-Sale Securities, Net of Tax			Total
Balance as of December 31, 2018	$	(228	)	$	40		$	(188	)
Other comprehensive income (loss) before reclassifications	(54		)	(4		)	(58		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			—			—
Other comprehensive income (loss)	(54		)	(4		)	(58		)
Balance as of March 31, 2019	$	(282	)	$	36		$	(246	)

Other Income (Expense), Net

The components of other income (expense), net, for the three months ended March 31, 2018 and 2019 were as follows (in millions):



	Three Months Ended March 31,
	2018			2019
Interest income	$	18		$	44
Foreign currency exchange gains (losses), net	13			(1		)
Gain on divestitures ⁽¹⁾	3,161			—
Gain on debt and equity securities, net ⁽²⁾	1,984			16
Change in fair value of embedded derivatives	(367		)	175
Other	128			26
Other income (expense), net	$	4,937		$	260

⁽¹⁾ During the first quarter of 2018, Gain on divestitures primarily includes a $2.2 billion gain on the sale of the Company’s Southeast Asia operations to Grab Holding Inc. (“Grab”) and a $954 million gain on the disposal of the Company’s Uber Russia/CIS operations. On March 25, 2018, two wholly-owned subsidiaries of the Company signed and completed an agreement with Grab pursuant to which Grab hired employees and acquired certain assets of the Company in the region, including Rider, Driver Partners, and Eater contracts in Southeast Asia. The net assets contributed by the Company were not material. In exchange, the Company received shares of Grab Series G preferred stock which was recorded at fair value as additional sale consideration. Refer to Note 4 - Equity Method Investments for more information on the disposal of the Company's Uber Russia/CIS operations.

⁽²⁾ During the first quarter of 2018, Gain on debt and equity securities, net represents a $2.0 billion unrealized gain on the Company’s non-marketable equity securities related to Didi. Refer to Note 3 - Fair Value Measurement for further information.

Redeemable Convertible Preferred Stock, Common Stock, and Stockholders' Deficit (Tables)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Summary of Activity in Restricted Common Stock

The following table summarizes the activity related to the Company’s restricted common stock for the three months ended March 31, 2019. For purposes of this table, vested restricted common stock represents the shares for which the service condition had been fulfilled as of the three months ended March 31, 2019 (in thousands, except per share amounts):



	Number of Shares		Weighted-average Grant-Date Fair Value per Share
Unvested restricted common stock as of December 31, 2018	898		$	30.33
Granted	—		$	—
Vested	(209	)	$	34.82
Canceled	(32	)	$	34.86
Unvested restricted common stock as of March 31, 2019	657		$	28.68

Summary of Stock Options and SAR Activity

A summary of stock option and SAR activity for the three months ended March 31, 2019 is as follows (in millions, except share amounts which are reflected in thousands, per share amounts, and years):



	SARs Outstanding Number of SARs		Options Outstanding Number of Shares		Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value
As of December 31, 2018	758		42,936		$	9.22	5.74	$	1,456
Awards granted	53		250		$	42.52
Awards exercised	—		(677	)	$	3.01
Awards forfeited	(8	)	(43	)	$	32.10
As of March 31, 2019	803		42,466		$	9.51	5.51	$	1,808
Vested and expected to vest as of March 31, 2019	621		35,337		$	4.19	5.14	$	1,694
Exercisable as of March 31, 2019	621		36,245		$	4.95	5.22	$	1,709

Schedule of Restricted Stock Units Activity

The following table summarizes the activity related to the Company’s RSUs for the three months ended March 31, 2019. For purposes of this table, vested RSUs represent the shares for which the service condition had been fulfilled as of March 31, 2019 (in thousands, except per share amounts):



	Number of Shares		Weighted-Average Grant-Date Fair Value per Share
Unvested and outstanding as of December 31, 2018	75,835		$	37.20
Granted	31,476		$	42.52
Vested	(8,694	)	$	34.35
Canceled	(1,713	)	$	23.84
Unvested and outstanding as of March 31, 2019	96,904		$	39.42
Vested and outstanding as of March 31, 2019	71,307		$	28.93

Schedule of Stock-Based Compensation Expense by Function

The following table summarizes total stock-based compensation expense by function for the three months ended March 31, 2018 and 2019 (in millions):



	Three Months Ended March 31,
	2018		2019
Operations and support	$	5	$	1
Sales and marketing	4		1
Research and development	6		3
General and administrative	48		6
Total	$	63	$	11

Schedule of Fair Value Assumptions, SARs and Performance Awards

Awards with market-based targets granted was determined using a Monte Carlo model with the following weighted-average assumptions:



	Three Months Ended March 31,
	2018		2019
Risk-free interest rate	2.8	%	2.7	%
Expected volatility	39.0	%	39.0	%
Expected dividend yield	—	%	—	%

The fair value of stock options and SARs granted was determined using the Black-Scholes option pricing model with the following weighted-average assumptions:



	Three Months Ended March 31,
	2018		2019
Expected term (in years)	5.7		5.9
Risk-free interest rate	2.7	%	2.3	%
Expected volatility	32.6	%	34.9	%
Expected dividend yield	—	%	—	%

Net Income (Loss) Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Net Income (Loss) Per Share

The following table sets forth the computation of basic and diluted net income (loss) per share attributable to common stockholders (in millions, except share amounts which are reflected in thousands, and per share amounts):



	Three Months Ended March 31,
	2018			2019
Basic net income (loss) per share:
Numerator
Net income (loss)	$	3,748		$	(1,016	)
Less: net loss attributable to redeemable non-controlling interest, net of tax	—			4
Less: noncumulative dividends to preferred stockholders	(1,069		)	—
Less: undistributed earnings to participating securities	(1,803		)	—
Net income (loss) attributable to common stockholders	$	876		$	(1,012	)
Denominator
Basic weighted-average common stock outstanding	437,065			453,543
Basic net income (loss) per share attributable to common stockholders	$	2.00		$	(2.23	)
Diluted net income (loss) per share:
Numerator
Net income (loss) attributable to common stockholders	$	876		$	(1,012	)
Add: Change in fair value of MLU B.V. put/call feature	—			(12		)
Add: noncumulative dividends to preferred stockholders	—			—
Diluted net income (loss) attributable to common stockholders	$	876		$	(1,024	)
Denominator
Number of shares used in basic net income (loss) per share computation	437,065			453,543
Weighted-average effect of potentially dilutive securities:
Common stock subject to a put/call feature	653			76
Stock options	35,729			—
RSUs to settle fixed monetary awards	1,617			—
Other	89			—
Diluted weighted-average common stock outstanding	475,153			453,619
Diluted net income (loss) per share attributable to common stockholders	$	1.84		$	(2.26	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following potentially dilutive outstanding securities as of March 31, 2018 and 2019 were excluded from the computation of diluted net income (loss) per share because their effect would have been anti-dilutive for the periods presented, or issuance of such shares is contingent upon the satisfaction of certain conditions which were not satisfied by the end of the period (in thousands):



	Three Months Ended March 31,
	2018	2019
Redeemable convertible preferred stock	894,060	904,530
Convertible notes	198,484	202,733
Stock options	7,654	42,466
Restricted common stock with performance condition	955	1,939
Common stock subject to repurchase	10,058	1,570
Warrants to purchase redeemable convertible preferred stock	1,585	150
SARs	867	803
RSUs to settle fixed monetary awards	1,066	999
RSUs	116,973	168,210
Warrants to purchase common stock	178	187
Total	1,231,880	1,323,587

Segment Information and Geographic Information (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

The following table provides information about the Company’s segments and a reconciliation of the total segment contribution profit (loss) to loss from operations (in millions):



	Three Months Ended March 31,
	2018			2019
Contribution profit (loss):
Core Platform	$	427		$	(117	)
Other Bets	(20		)	(71		)
Total segment contribution profit (loss)	407			(188		)
Reconciling items:
Research and development expenses related to ATG and Other Technology Programs⁽¹⁾	(117		)	(97		)
Unallocated research and development and general and administrative expenses^{(1), (2)}	(468		)	(584		)
Depreciation and amortization	(88		)	(146		)
Stock-based compensation expense	(63		)	(11		)
Asset impairment/loss on sale of assets	(32		)	(8		)
Acquisition and financing related expenses	(15		)	—
Impact of 2018 Divested Operations^{(1), (3)}	(102		)	—
Loss from operations	$	(478	)	$	(1,034	)

⁽¹⁾ Excluding stock-based compensation expense.

⁽²⁾ Unallocated research and development expenses include costs that are not directly attributable to the Core Platform and Other Bets segments. These include mapping and payment technologies and support and development of the internal technology infrastructure. Unallocated general and administrative expenses include certain shared costs such as finance, accounting, tax, human resources, information technology and legal costs. The Company’s allocation methodology is periodically evaluated and may change.

⁽³⁾ Defined as the Company’s 2018 operations in (i) Southeast Asia prior to the sale of those operations to Grab and (ii) Russia/CIS prior to the formation of the Company’s Yandex.Taxi joint venture.

Schedule of Revenue from Geographic Area

The following table sets forth revenue by geographic area for the three months ended March 31, 2018 and 2019 (in millions):



	Three Months Ended March 31,
	2018		2019
United States	$	1,330	$	1,757
Brazil	276		209
All other countries	978		1,133
Total revenue	$	2,584	$	3,099

Variable Interest Entities (VIEs) (Tables)

3 Months Ended

Mar. 31, 2019

Variable Interest Entity [Abstract]

Schedule of Variable Interest Entities

As of December 31, 2018 and March 31, 2019, the carrying amount of assets and liabilities recognized on the condensed consolidated balance sheets related to the Company’s interests in unconsolidated VIEs and the Company’s maximum exposure to loss relating to unconsolidated VIEs was as follows (in millions):



	As of
	December 31, 2018		March 31, 2019
Investment	$	78	$	136
Additional cash contribution	58		—
Limited guarantee	50		50
Maximum exposure to loss	$	186	$	186

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

+ References + Details

Basis of Presentation and Summary of Significant Accounting Policies (Details) $ / shares in Units, shares in Millions, $ in Millions			3 Months Ended
	May 14, 2019 USD ($) $ / shares shares	Mar. 26, 2019 USD ($)	Mar. 31, 2019 USD ($) renewal_option segment	May 16, 2019 $ / shares	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Subsidiary, Sale of Stock [Line Items]
Number of operating segments \| segment			2
Number of reportable segments \| segment			2
Number of renewal options \| renewal_option			1
Lease renewal term			14 years
Termination option period			1 year
ROU assets generated from leased assets outside of the U.S. (Less than)			15.00%
Operating lease right-of-use assets			$ 1,323
Operating lease, liability			1,403
Built-to-suit assets, derecognized amounts			(1,325)			$ (1,641)
Built-to-suit assets, derecognized financing obligation reclassified			1,320			1,312
Accumulated deficit			$ (8,868)			$ (7,865)
ASU 2016-02
Subsidiary, Sale of Stock [Line Items]
Operating lease right-of-use assets					$ 888
Operating lease, liability					963
Built-to-suit assets, derecognized amounts					392
Built to suit assets, financing obligation					350
Deferred tax liability, derecognized built-to-suit assets					9
Built-to-suit assets, derecognized financing obligation reclassified					60
Accumulated deficit					$ (9)
Maximum
Subsidiary, Sale of Stock [Line Items]
Operating and finance leases, term of contract			76 years
Careem Inc.
Subsidiary, Sale of Stock [Line Items]
Asset acquisition, consideration transferred		$ 3,100
Asset acquisition, consideration transferred, debt instruments		1,700
Asset acquisition, consideration transferred, cash		$ 1,400
IPO \| Subsequent Event
Subsidiary, Sale of Stock [Line Items]
Stock issued during period (in shares) \| shares	180.0
Stock price (in dollars per share) \| $ / shares	$ 45.00			$ 45.00
Proceeds from issuance of common stock	$ 8,000
Conversion of shares (in shares) \| shares	905.0
Exercise of common stock warrants (in shares) \| shares	0.2
Underwriters' discounts and commissions \| Subsequent Event
Subsidiary, Sale of Stock [Line Items]
Payments of stock issuance costs	$ 106

Revenue (Details) - USD ($) $ in Millions	3 Months Ended
Revenue (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 3,099	$ 2,584
Core Platform revenue
Disaggregation of Revenue [Line Items]
Revenue	2,954	2,544
Core Platform revenue \| United States and Canada
Disaggregation of Revenue [Line Items]
Revenue	1,750	1,387
Core Platform revenue \| Latin America (LATAM)
Disaggregation of Revenue [Line Items]
Revenue	450	518
Core Platform revenue \| Europe, Middle East and Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenue	487	388
Core Platform revenue \| Asia Pacific (APAC)
Disaggregation of Revenue [Line Items]
Revenue	267	251
Ridesharing revenue
Disaggregation of Revenue [Line Items]
Revenue excluding vehicle solutions revenue	2,376	2,180
Uber Eats revenue
Disaggregation of Revenue [Line Items]
Revenue excluding vehicle solutions revenue	536	283
Vehicle Solutions revenue
Disaggregation of Revenue [Line Items]
Vehicle Solutions revenue, under ASC 840		55
Vehicle Solutions revenue, under ASC 842	10
Other revenue
Disaggregation of Revenue [Line Items]
Revenue excluding vehicle solutions revenue	32	26
Other Bets revenue
Disaggregation of Revenue [Line Items]
Revenue excluding vehicle solutions revenue	$ 145	$ 40

Revenue - Remaining Performance Obligation (Details) $ in Millions	Mar. 31, 2019 USD ($)
Revenue from Contract with Customer [Abstract]
Performance obligation, amount	$ 126
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue from Contract with Customer [Abstract]
Performance obligation, amount	$ 52
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue from Contract with Customer [Abstract]
Performance obligation, amount	$ 74
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance period

Fair Value Measurement - Investments (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Non-marketable equity securities:
Total carrying value at the end of the period	$ 8,032	$ 7,985
Debt Securities [Abstract]
Debt securities	2,364	2,370
Investments	10,396	10,355
Didi
Non-marketable equity securities:
Total carrying value at the end of the period	7,953	7,953
Other
Non-marketable equity securities:
Total carrying value at the end of the period	79	32
Grab
Debt Securities [Abstract]
Debt securities	2,324	2,328
Other
Debt Securities [Abstract]
Debt securities	$ 40	$ 42

Fair Value Measurement - Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Investments:
Debt securities	$ 2,364	$ 2,370
Other long-term liabilities:
Warrants		45
Recurring
Financial Assets
Cash and cash equivalents	519	268
Restricted cash and cash equivalents	1,246	1,237
Other current assets:
Other	3	0
Investments:
Debt securities	2,364	2,370
Total financial assets	4,132	3,875
Accrued and other current liabilities:
Other	0	9
Other long-term liabilities:
Warrants	8	52
Embedded derivatives	1,843	2,018
Total financial liabilities	1,851	2,079
Recurring \| Level 1
Financial Assets
Cash and cash equivalents	519	268
Restricted cash and cash equivalents	1,246	1,237
Other current assets:
Other	0	0
Investments:
Debt securities	0	0
Total financial assets	1,765	1,505
Accrued and other current liabilities:
Other	0	0
Other long-term liabilities:
Warrants	0	0
Embedded derivatives	0	0
Total financial liabilities	0	0
Recurring \| Level 2
Financial Assets
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Other current assets:
Other	0	0
Investments:
Debt securities	0	0
Total financial assets	0	0
Accrued and other current liabilities:
Other	0	0
Other long-term liabilities:
Warrants	0	0
Embedded derivatives	0	0
Total financial liabilities	0	0
Recurring \| Level 3
Financial Assets
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Other current assets:
Other	3	0
Investments:
Debt securities	2,364	2,370
Total financial assets	2,367	2,370
Accrued and other current liabilities:
Other	0	9
Other long-term liabilities:
Warrants	8	52
Embedded derivatives	1,843	2,018
Total financial liabilities	$ 1,851	$ 2,079

Fair Value Measurement - Summary of Amortized Cost, Unrealized Gains and Losses of Financial Assets (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Amortized Cost	$ 2,305	$ 2,305
Unrealized Gains	65	65
Unrealized Losses	(6)	0
Fair Value	$ 2,364	$ 2,370

Fair Value Measurement - Summary of Unobservable Inputs (Details)	Mar. 31, 2019 $ / shares
Relative weighting
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing transactions, measurement input	1
Transaction price per share
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing transactions, measurement input	6.16

Fair Value Measurement - Summary of Amortized Costs and Fair Value of Financial Assets (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Amortized Cost
Amortized Cost, Due within one year	$ 0	$ 0
Amortized Cost, Due after one year through five years	2,275	2,275
Amortized Cost	2,275	2,275
Fair Value
Fair Value, Due within one year	0	0
Fair Value, Due after one year through five years	2,324	2,328
Fair Value	$ 2,324	$ 2,328

Fair Value Measurement - Fair Value of Unobservable Inputs, Assets (Details) - Debt Securities $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance as of December 31, 2018	$ 2,370
Total net gains (losses)
Included in earnings	(2)
Included in other comprehensive income (loss)	(4)
Balance as of March 31, 2019	$ 2,364

Fair Value Measurement - Fair Value of Unobservable Inputs, Liabilities (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance as of December 31, 2018	$ 52
Vesting of share warrants	1
Exercise of vested share warrants	(45)
Change in fair value	0
Balance as of March 31, 2019	8
Convertible Debt Embedded Derivative
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance as of December 31, 2018	2,018
Change in fair value	(175)
Balance as of March 31, 2019	$ 1,843

Fair Value Measurement - Narrative (Details) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Feb. 29, 2016 warrant $ / shares shares	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of warrants issued during period \| warrant	2
Exercise price of warrants (in dollars per share) \| $ / shares	$ 0.01
Warrants				$ 45
Exercise of common stock warrants			$ 1
Redeemable Non-Controlling Interest \| Redeemable Convertible Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exercise of common stock warrants		$ 45
Warrants Issued, Tranche One
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of securities called by warrants (in shares) \| shares	205,034
Warrants Issued, Tranche Two
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of securities called by warrants (in shares) \| shares	820,138
Qualified Input Public Offering Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible debt embedded derivative, rate		1
Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible debt embedded derivative, rate		0.063	0.082

Fair Value Measurement - Unrealized Gain (Loss) on Non-Marketable Securities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Upward adjustments	$ 18	$ 1,984
Downward adjustments (including impairment)	0	0
Total unrealized gain for non-marketable equity securities	$ 18	$ 1,984

Fair Value Measurement - Change In Equity Securities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Initial cost basis		$ 6,030	$ 6,001
Upward adjustments	$ 2,002	1,984
Downward adjustments (including impairment)	0	0
Total carrying value at the end of the period	$ 8,032	$ 7,985

Equity Method Investments - Equity Method Investments (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 1,320	$ 1,312
MLU B.V.
Schedule of Equity Method Investments [Line Items]
Equity method investments	1,182	1,234	$ 1,400
Mission Bay 3 and 4
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 138	$ 78

Equity Method Investments - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Cash contributed for acquisition of equity method investments	$ 0	$ 423
Issuance of common stock as consideration for investment and acquisition		52
Recognized gain on derecognition of assets/liabilities	0	3,161
Equity method investments	1,320		$ 1,312
MLU B.V.
Schedule of Equity Method Investments [Line Items]
Cash contributed for acquisition of equity method investments		$ 345
Shares issued for consideration for equity method investments (in shares)		2
Issuance of common stock as consideration for investment and acquisition		$ 52
Shares issued for consideration for equity method investments, call feature repurchase price per share (in dollars per share)		$ 48
Equity ownership interest		38.00%
Contingent ownership percentage		35.00%
Recognized gain on derecognition of assets/liabilities		$ 954
Equity method investments	1,182	1,400	$ 1,234
Basis difference in equity method investment	$ 734	$ 908
Weighted-average life of intangible asset	5 years 6 months

Property and Equipment, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total	$ 2,402		$ 2,587
Less: Accumulated depreciation and amortization	(1,077)		(946)
Property and equipment, net	1,325		1,641
Depreciation	137	$ 82
Land
Property, Plant and Equipment [Line Items]
Total	67		67
Building and site improvements
Property, Plant and Equipment [Line Items]
Total	40		93
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total	312		315
Computer equipment
Property, Plant and Equipment [Line Items]
Total	880		858
Leased computer equipment
Property, Plant and Equipment [Line Items]
Total	371		288
Leased vehicles
Property, Plant and Equipment [Line Items]
Total	33		34
Internal-use software
Property, Plant and Equipment [Line Items]
Total	72		51
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total	39		39
Dockless e-bikes
Property, Plant and Equipment [Line Items]
Total	18		10
Construction in progress
Property, Plant and Equipment [Line Items]
Total	$ 570		$ 832

Leases - Lease Costs (Details) $ in Millions	3 Months Ended
Leases - Lease Costs (Details) $ in Millions	Mar. 31, 2019 USD ($)
Lease cost
Amortization of assets	$ 36
Interest of lease liabilities	4
Operating lease cost	67
Short-term lease cost	8
Variable lease cost	25
Sublease income	(1)
Total lease cost	$ 139

Leases - Supplemental Cash Flow Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from financing leases	$ 3
Operating cash flows from operating leases	52
Financing cash flows from financing leases	41
Right-of-use assets obtained in exchange for lease obligations:
Operating lease liabilities	474
Finance lease liabilities	$ 83

Leases - Narrative (Details) ft² in Thousands, $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 30, 2016 lease	Mar. 31, 2019 USD ($)	Dec. 31, 2015 ft² building	Dec. 31, 2018 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease liabilities		$ 474
Operating lease, lease not yet commenced		17
Finance lease, lease not yet commenced		50
Property and equipment, net		$ 1,325		$ 1,641
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, lease not yet commenced, term		1 year
Finance lease, lease not yet commenced, term		1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, lease not yet commenced, term		10 years
Finance lease, lease not yet commenced, term		10 years
Mission Bay 3 and 4
Lessee, Lease, Description [Line Items]
Operating lease liabilities		$ 415
Finance Obligation
Lessee, Lease, Description [Line Items]
Number of buildings under contract \| building			2
Rentable square feet under contract \| ft²			423
Ownership acquired under the sale leaseback contract			49.00%
Ownership percentage retained following lease termination	100.00%
Land Leases
Lessee, Lease, Description [Line Items]
Ownership acquired under the sale leaseback contract		51.00%
Number of land agreement leases \| lease	2
Lease term	75 years
Commitments under Land Leases		$ 172
Commitments under Land Leases		1,800
Financing obligation		88
Land Leases \| Land
Lessee, Lease, Description [Line Items]
Property and equipment, net		$ 65

Leases - Supplemental Balance Sheet Information - Operating Leases (Details) $ in Millions	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 1,323
Operating lease liability, current	178
Operating lease liabilities, non-current	1,225
Total operating lease liabilities	1,403
Operating Lease Excluding Finance Obligation
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	1,323
Operating lease liability, current	178
Operating lease liabilities, non-current	1,225
Total operating lease liabilities	$ 1,403

Leases - Supplemental Balance Sheet Information - Finance Leases (Details) $ in Millions	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Other current liabilities	$ 115
Finance Lease Excluding Finance Obligation
Lessee, Lease, Description [Line Items]
Property and equipment, at cost	371
Accumulated depreciation	(133)
Property and equipment, net	238
Other current liabilities	115
Other long-term liabilities	130
Total finance leases liabilities	$ 245

Leases - Additional Lease Information (Details)	Mar. 31, 2019
Weighted-average remaining lease term
Operating leases (in years)	17 years
Finance leases (in years)	2 years
Weighted-average discount rate
Operating leases (as a percent)	7.50%
Finance leases (as a percent)	5.00%

Leases - Maturity of Lease Liabilities (Details) $ in Millions	Mar. 31, 2019 USD ($)
Operating Leases
Remainder of 2019	$ 169
2020	210
2021	232
2022	200
2023	169
Thereafter	1,974
Total undiscounted lease payments	2,954
Less: imputed interest	(1,551)
Total lease liabilities	1,403
Finance Lease Excluding Finance Obligation
Lessee, Lease, Description [Line Items]
Remainder of 2019	101
2020	89
2021	63
2022	5
2023	0
Thereafter	0
Total undiscounted lease payments	258
Less: imputed interest	(13)
Total lease liabilities	$ 245

Leases - Failed Sale-Leaseback Transaction (Details) - Finance Obligation $ in Millions	Mar. 31, 2019 USD ($)
Finance Leases
Remainder of 2019	$ 0
2020	2
2021	6
2022	6
2023	6
Thereafter	833
Total undiscounted lease payments	$ 853

Long-Term Debt and Revolving Credit Arrangements - Components of Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Jun. 13, 2018	Dec. 31, 2015
Debt Instrument [Line Items]
Total debt	$ 7,507	$ 7,491
Less: unamortized discount and issuance costs	(541)	(595)
Less: current portion of long-term debt	(27)	(27)
Total long-term debt	6,939	6,869
Secured Loans \| 2016 Senior Secured Term Loan
Debt Instrument [Line Items]
Total debt	$ 1,121	1,124
Effective Interest Rate	6.10%		6.10%
Secured Loans \| 2018 Senior Secured Term Loan
Debt Instrument [Line Items]
Total debt	$ 1,489	1,493
Effective Interest Rate	6.20%
Convertible Notes \| 2021 Convertible Notes
Debt Instrument [Line Items]
Total debt	$ 1,867	1,844
Effective Interest Rate	23.50%			23.50%
Convertible Notes \| 2022 Convertible Notes
Debt Instrument [Line Items]
Total debt	$ 1,030	1,030
Effective Interest Rate	13.70%
Senior Note \| 2023 Senior Note
Debt Instrument [Line Items]
Total debt	$ 500	500
Effective Interest Rate	7.70%
Senior Note \| 2026 Senior Note
Debt Instrument [Line Items]
Total debt	$ 1,500	$ 1,500
Effective Interest Rate	8.10%

Long-Term Debt and Revolving Credit Arrangements - Narrative (Details) - USD ($)	1 Months Ended			3 Months Ended		12 Months Ended
	Oct. 31, 2018	Apr. 30, 2018	Jul. 31, 2016	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2015	Dec. 31, 2018	Jun. 13, 2018
Debt Instrument [Line Items]
Total debt				$ 7,507,000,000			$ 7,491,000,000
Embedded derivative liability income (expense)				$ 175,000,000	$ (367,000,000)
Secured Loans \| 2016 Senior Secured Term Loan
Debt Instrument [Line Items]
Proceeds from issuance of secured debt			$ 1,200,000,000
Debt discount			23,000,000
Debt issuance costs			$ 13,000,000
Effective Interest Rate				6.10%				6.10%
Total debt				$ 1,121,000,000			1,124,000,000
Secured Loans \| 2018 Senior Secured Term Loan
Debt Instrument [Line Items]
Proceeds from issuance of secured debt		$ 1,500,000,000
Debt discount		8,000,000
Debt issuance costs		$ 15,000,000
Effective Interest Rate				6.20%
Total debt				$ 1,489,000,000			1,493,000,000
Convertible Notes \| 2021 Convertible Notes
Debt Instrument [Line Items]
Debt discount						$ 1,100,000,000
Debt issuance costs						$ 1,000,000
Effective Interest Rate				23.50%		23.50%
Total debt				$ 1,867,000,000			1,844,000,000
Proceeds from issuance of convertible debt						$ 1,700,000,000
Stated interest rate						2.50%
Duration for interest type payment election						4 years
Interest rate increase during final 2 year initial term						12.50%
Embedded derivative liability income (expense)				129,000,000	(314,000,000)
Convertible Notes \| 2021 Convertible Notes \| Level 3
Debt Instrument [Line Items]
Debt instrument, fair value disclosure				$ 2,800,000,000
Convertible Notes \| 2021 Convertible Notes \| Minimum
Debt Instrument [Line Items]
Interest rate during maturity extension period						3.50%
Discount on conversion price rate						18.00%
Convertible Notes \| 2021 Convertible Notes \| Maximum
Debt Instrument [Line Items]
Interest rate during maturity extension period						12.50%
Discount on conversion price rate						30.50%
Convertible Notes \| 2022 Convertible Notes
Debt Instrument [Line Items]
Proceeds from issuance of secured debt						$ 949,000,000
Debt discount						312,000,000
Debt issuance costs						$ 100,000
Effective Interest Rate				13.70%
Total debt				$ 1,030,000,000			1,030,000,000
Stated interest rate						2.50%
Embedded derivative liability income (expense)				46,000,000	$ (53,000,000)
Extension period						1 year
Convertible Notes, internal rate of return						8.00%
Redemption period						3 years
Convertible Notes \| 2022 Convertible Notes \| Level 3
Debt Instrument [Line Items]
Debt instrument, fair value disclosure				$ 1,400,000,000
Convertible Notes \| 2022 Convertible Notes \| Minimum
Debt Instrument [Line Items]
Discount on conversion price rate						8.10%
Convertible Notes \| 2022 Convertible Notes \| Maximum
Debt Instrument [Line Items]
Discount on conversion price rate						44.50%
Senior Note
Debt Instrument [Line Items]
Aggregate principal amount	$ 2,000,000,000.0
Senior Note \| 2023 Senior Note
Debt Instrument [Line Items]
Debt issuance costs	$ 9,000,000
Effective Interest Rate				7.70%
Total debt				$ 500,000,000			500,000,000
Stated interest rate	7.50%
Debt instrument term	5 years
Aggregate principal amount	$ 500,000,000
Senior Note \| 2023 Senior Note \| Level 2
Debt Instrument [Line Items]
Debt instrument, fair value disclosure				$ 525,000,000
Senior Note \| 2026 Senior Note
Debt Instrument [Line Items]
Effective Interest Rate				8.10%
Total debt				$ 1,500,000,000			1,500,000,000
Stated interest rate	8.00%
Debt instrument term	8 years
Aggregate principal amount	$ 1,500,000,000
Senior Note \| 2026 Senior Note \| Level 2
Debt Instrument [Line Items]
Debt instrument, fair value disclosure				1,600,000,000
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity				$ 2,300,000,000
Credit facility, term				5 years
Line of credit balance				$ 0
Line of Credit \| Letters of Credit
Debt Instrument [Line Items]
Letters of credit outstanding				473,000,000			470,000,000
Letters of credit outstanding that will reduce the available credit under facilities				$ 169,000,000			$ 166,000,000

Long-Term Debt and Revolving Credit Arrangements - Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Debt Disclosure [Abstract]
Contractual interest coupon	$ 140	$ 32
Amortization of debt discount and issuance costs	53	72
8% IRR payout	17	14
Total interest expense from long-term debt	$ 210	$ 118

Assets and Liabilities Held for Sale - Narrative (Details) - Lion City Rentals - Not Discontinued Operations $ in Millions	Jan. 25, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity percentage to be purchased	100.00%
Fair value of consideration received, cash	$ 310
Contingent consideration	$ 33

Assets and Liabilities Held for Sale - Summary of Information (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Assets held for sale
Total assets held for sale	$ 0	$ 406
Liabilities held for sale
Total liabilities held for sale	$ 0	11
Not Discontinued Operations \| Lion City Rentals
Assets held for sale
Cash and cash equivalents		34
Accounts receivable, net		20
Prepaid expenses and other current assets		30
Property and equipment, net		322
Total assets held for sale		406
Liabilities held for sale
Accounts payable		2
Accrued liabilities		2
Other current liabilities		7
Total liabilities held for sale		11
Net assets held for sale		$ 395

Supplemental Financial Statement Information - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid expenses	$ 252	$ 265
Other receivables	483	416
Other	240	179
Prepaid expenses and other current assets	$ 975	$ 860

Supplemental Financial Statement Information - Accrued and Other Current Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued legal, regulatory and non-income taxes	$ 1,175	$ 1,134
Accrued Partner liability	725	459
Accrued professional and contractor services	310	298
Accrued compensation and employee benefits	151	261
Accrued marketing expenses	145	152
Other accrued expenses	185	160
Income and other tax liabilities	125	157
Government and airport fees payable	124	104
Short-term finance lease obligation for computer equipment		110
Short-term finance lease obligation for computer equipment	115
Other	369	322
Accrued and other current liabilities	$ 3,424	$ 3,157

Supplemental Financial Statement Information - Other Long-Term Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Convertible debt embedded derivatives	$ 1,843	$ 2,018
Deferred tax liabilities	1,068	1,072
Financing obligation	88	436
Income tax payable	101	80
Other	487	466
Other long-term liabilities	$ 3,587	$ 4,072

Supplemental Financial Statement Information - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity, beginning balance	$ (7,385)	$ (8,557)
Other comprehensive income (loss) before reclassifications	(58)	(7)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Other comprehensive income (loss)	(58)	(7)
Stockholders' equity, ending balance	(8,432)	(4,726)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity, beginning balance	(188)	(3)
Stockholders' equity, ending balance	(246)	(10)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity, beginning balance	(228)	(3)
Other comprehensive income (loss) before reclassifications	(54)	(7)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Other comprehensive income (loss)	(54)	(7)
Stockholders' equity, ending balance	(282)	(10)
Unrealized Gains (Losses) on Available-for-Sale Securities, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity, beginning balance	40	0
Other comprehensive income (loss) before reclassifications	(4)	0
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Other comprehensive income (loss)	(4)	0
Stockholders' equity, ending balance	$ 36	$ 0

Supplemental Financial Statement Information - Other Income (Expenses), Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest income	$ 44	$ 18
Foreign currency exchange gains (losses), net	(1)	13
Gain on divestitures	0	3,161
Gain on debt and equity securities, net	16	1,984
Change in fair value of embedded derivatives	175	(367)
Other	26	128
Other income (expense), net	260	4,937
Upward adjustments	$ 18	1,984
Grab Holding, Inc.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestitures		2,200
UBER Russia, CIS Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestitures		$ 954

Redeemable Convertible Preferred Stock, Common Stock, and Stockholders' Deficit - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Jan. 31, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of stock options exercised		$ 27	$ 240
Unamortized compensation costs		$ 6,200
Weighted-average grant-date fair value of options and SARs (in dollars per share)		$ 21.93	$ 12.38
Time-based vesting condition, satisfied or partially satisfied		$ 3,400
Time-based vesting condition, not satisfied or partially satisfied		$ 2,800
Performance Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value (in dollars per share)		$ 18.20	$ 15.68
Weighted-average derived service period		2 years 1 month 13 days	3 years 9 months 29 days
Time-based vesting condition, not satisfied or partially satisfied		$ 62
Restricted Stock Awards, Restricted Stock Units, and Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation costs		$ 65
Weighted-average recognition period		2 years 4 months 24 days
2013 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock reserved for issuance (in shares)	85,000,000
Number of shares reserved for future issuance (in shares)	293,000,000
2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for future issuance (in shares)		130,000,000
ESPP 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for future issuance (in shares)		25,000,000
Series E Redeemable Convertible Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of securities called by warrants (in shares)				150,071
Series G Redeemable Convertible Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of securities called by warrants (in shares)				922,655

Redeemable Convertible Preferred Stock, Common Stock, and Stockholders' Deficit - Summary of Restricted Common Stock (Details) - Restricted Stock shares in Thousands	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares outstanding (in shares) \| shares	898
Awards granted (in shares) \| shares	0
Awards vested (in shares) \| shares	(209)
Awards canceled (in shares) \| shares	(32)
Shares outstanding (in shares) \| shares	657
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Grant-Date Fair Value per Share, Unvested and Outstanding (in dollars per share) \| $ / shares	$ 30.33
Weighted-Average Grant-Date Fair Value per Share, Granted (in dollars per share) \| $ / shares	0
Weighted-Average Grant-Date Fair Value per Share, Vested (in dollars per share) \| $ / shares	34.82
Weighted-Average Grant-Date Fair Value per Share, Canceled (in dollars per share) \| $ / shares	34.86
Weighted-Average Grant-Date Fair Value per Share, Unvested and Outstanding (in dollars per share) \| $ / shares	$ 28.68

Redeemable Convertible Preferred Stock, Common Stock, and Stockholders' Deficit - SAR and Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Share-Based Compensation Arrangement By Share-Based Payment Award, Options And Equity Instruments Other Than Options, Nonvested, Number Of Shares [Abstract]
Weighted-Average Exercise Price Per Share, Outstanding (in dollars per share)	$ 9.22
Weighted-Average Exercise Price Per Share, Awards granted (in dollars per share)	42.52
Weighted-Average Exercise Price Per Share, Awards exercised (in dollars per share)	3.01
Weighted-Average Exercise Price Per Share, Awards forfeited (in dollars per share)	32.10
Weighted-Average Exercise Price Per Share, Outstanding (in dollars per share)	9.51	$ 9.22
Weighted-Average Exercise Price Per Share, Vested and expected to vest (in dollars per share)	4.19
Weighted-Average Exercise Price Per Share, Exercisable (in dollars per share)	$ 4.95
Share-Based Compensation Arrangement By Share-based Payment Award, Options And Equity Instruments Other Than Options, Nonvested, Additional Disclosures [Abstract]
Weighted-Average Contractual Life, Outstanding	5 years 6 months 3 days	5 years 8 months 26 days
Weighted-Average Contractual Life, Vested and expected to vest	5 years 1 month 20 days
Weighted-Average Contractual Life, Exercisable	5 years 2 months 19 days
Aggregate Intrinsic Value, Outstanding	$ 1,808	$ 1,456
Aggregate Intrinsic Value, Vested and expected to vest	1,694
Aggregate Intrinsic Value, Exercisable	$ 1,709
SARs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Shares outstanding (in shares)	758
Awards granted (in shares)	53
Awards exercised (in shares)	0
Awards canceled (in shares)	(8)
Shares outstanding (in shares)	803	758
Vested and expected to vest (in shares)	621
Exercisable (in shares)	621
Stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding (in shares)	42,936
Awards granted (in shares)	250
Awards exercised (in shares)	(677)
Awards forfeited (in shares)	(43)
Options outstanding (in shares)	42,466	42,936
Vested and expected to vest (in shares)	35,337
Exercisable (in shares)	36,245

Redeemable Convertible Preferred Stock, Common Stock, and Stockholders' Deficit - Restricted Stock Units Activity (Details) - RSUs shares in Thousands	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares outstanding (in shares) \| shares	75,835
Awards granted (in shares) \| shares	31,476
Awards vested (in shares) \| shares	(8,694)
Awards canceled (in shares) \| shares	(1,713)
Shares outstanding (in shares) \| shares	96,904
Vested and expected to vest (in shares) \| shares	71,307
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Grant-Date Fair Value per Share, Unvested and Outstanding (in dollars per share) \| $ / shares	$ 37.20
Weighted-Average Grant-Date Fair Value per Share, Granted (in dollars per share) \| $ / shares	42.52
Weighted-Average Grant-Date Fair Value per Share, Vested (in dollars per share) \| $ / shares	34.35
Weighted-Average Grant-Date Fair Value per Share, Canceled (in dollars per share) \| $ / shares	23.84
Weighted-Average Grant-Date Fair Value per Share, Unvested and Outstanding (in dollars per share) \| $ / shares	39.42
Weighted-Average Grant-Date Fair Value per Share, Vested and outstanding (in dollars per share) \| $ / shares	$ 28.93

Redeemable Convertible Preferred Stock, Common Stock, and Stockholders' Deficit - Stock-Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 11	$ 63
Operations and support
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1	5
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1	4
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	3	6
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 6	$ 48

Redeemable Convertible Preferred Stock, Common Stock, and Stockholders' Deficit - Valuation Assumptions (Details)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Options and SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	5 years 10 months 24 days	5 years 8 months 12 days
Risk-free interest rate	2.30%	2.70%
Expected volatility	34.90%	32.60%
Expected dividend yield	0.00%	0.00%
Performance Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.70%	2.80%
Expected volatility	39.00%	39.00%
Expected dividend yield	0.00%	0.00%

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018
Operating Loss Carryforwards [Line Items]
Provision for income taxes	$ 19	$ 576
Effective tax rate	(2.00%)	13.00%
Reserve on uncertain tax positions	$ 1,300
Increase in gross unrecognized tax benefits	1,300
Settlement with Taxing Authority
Operating Loss Carryforwards [Line Items]
Expected decrease resulting from settlements with taxing authorities	141
Foreign Deferred Tax Asset, Intellectual Property
Operating Loss Carryforwards [Line Items]
Step-up tax basis, intellectual property, foreign assets	$ 6,100

Net Income (Loss) Per Share - Net Income (Loss) Per Share Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended
	May 14, 2019	Mar. 31, 2019	Mar. 31, 2018	May 16, 2019
Numerator
Net income (loss) including redeemable non-controlling interest		$ (1,016)	$ 3,748
Less: net loss attributable to redeemable non-controlling interest, net of tax		4	0
Less: noncumulative dividends to preferred stockholders		0	(1,069)
Less: undistributed earnings to participating securities		0	(1,803)
Net income (loss) attributable to common stockholders		$ (1,012)	$ 876
Denominator
Basic weighted-average common stock outstanding (in shares)		453,543	437,065
Basic net income (loss) per share attributable to common stockholders (in dollars per share)		$ (2.23)	$ 2.00
Numerator
Net income (loss) attributable to common stockholders		$ (1,012)	$ 876
Add: Change in fair value of MLU B.V. put/call feature		(12)	0
Add: noncumulative dividends to preferred stockholders		0	0
Diluted net income (loss) attributable to common stockholders		$ (1,024)	$ 876
Denominator
Basic weighted-average common stock outstanding (in shares)		453,543	437,065
Weighted-average effect of potentially dilutive securities:
Common stock subject to put/call feature (in shares)		76	653
Other (in shares)		0	89
Number of shares used in basic net income (loss) per share computation (in shares)		453,619	475,153
Diluted net income (loss) per share attributable to common stockholders (in dollars per share)		$ (2.26)	$ 1.84
IPO \| Subsequent Event
Weighted-average effect of potentially dilutive securities:
Stock issued during period (in shares)	180,000
Stock price (in dollars per share)	$ 45.00			$ 45.00
Conversion of shares (in shares)	905,000
Stock options
Weighted-average effect of potentially dilutive securities:
Stock options (in shares)		0	35,729
RSUs
Weighted-average effect of potentially dilutive securities:
Stock options (in shares)		0	1,617

Net Income (Loss) Per Share - Antidilutive Securities (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	1,323,587	1,231,880
Redeemable Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	904,530	894,060
Convertible notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	202,733	198,484
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	42,466	7,654
Restricted common stock with performance condition
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	1,939	955
Common stock subject to repurchase
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	1,570	10,058
Warrants to purchase redeemable convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	150	1,585
SARs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	803	867
RSUs to settle fixed monetary awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	999	1,066
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	168,210	116,973
Warrants to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	187	178

Segment Information and Geographic Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)
Segment Reporting [Abstract]
Number of operating segments \| segment	2
Number of reportable segments \| segment	2
Segment Reporting Information [Line Items]
Research and developed expenses related to ATG and Other Technology Programs	$ (409)	$ (340)
Depreciation and amortization	(146)	(88)
Stock-based compensation expense	(11)	(63)
Loss from operations	(1,034)	(478)
Segments
Segment Reporting Information [Line Items]
Loss from operations	(188)	407
Segments \| Core Platform
Segment Reporting Information [Line Items]
Loss from operations	(117)	427
Segments \| Other Bets
Segment Reporting Information [Line Items]
Loss from operations	(71)	(20)
Reconciling Items
Segment Reporting Information [Line Items]
Research and developed expenses related to ATG and Other Technology Programs	(97)	(117)
Unallocated research and development and general and administrative expenses	(584)	(468)
Depreciation and amortization	(146)	(88)
Stock-based compensation expense	(11)	(63)
Asset impairment/loss on sale of assets	(8)	(32)
Acquisition and financing related expenses	0	(15)
Impact of 2018 Divested Operations	$ 0	$ (102)

Segment Information and Geographic Information - Geographic Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenue	$ 3,099	$ 2,584
United States
Segment Reporting Information [Line Items]
Revenue	1,757	1,330
Brazil
Segment Reporting Information [Line Items]
Revenue	209	276
All other countries
Segment Reporting Information [Line Items]
Revenue	$ 1,133	$ 978

Commitments and Contingencies (Details) $ in Millions					1 Months Ended	12 Months Ended
Commitments and Contingencies (Details) $ in Millions	May 15, 2019 plaintiff	Mar. 26, 2019 USD ($)	Mar. 11, 2019 USD ($)	Sep. 25, 2018 plaintiff	May 31, 2017 indictment	Dec. 31, 2016 lawsuit	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 06, 2017 TWD ($)	Jan. 05, 2017 TWD ($)
Commitments and Contingencies Disclosure [Abstract]
Loss contingency accrual							$ 1,200	$ 1,100
Loss Contingencies [Line Items]
Taiwan, maximum fine per offense									$ 25,000,000	$ 150,000
O'Conner, et al., v. Uber Technologies, Inc. and Yucesoy v. Uber Technologies, Inc., et al.
Loss Contingencies [Line Items]
Number of plaintiffs \| plaintiff				2
O'Conner, et al., v. Uber Technologies, Inc. and Yucesoy v. Uber Technologies, Inc., et al. \| Settled Litigation
Loss Contingencies [Line Items]
Settlement amount awarded to other party			$ 20
Google v. Levandowski
Loss Contingencies [Line Items]
Settlement amount awarded to other party		$ 127
Joint and Several Liability
Loss Contingencies [Line Items]
Settlement amount awarded to other party		$ 1
Copenhagen Criminal Prosecution
Loss Contingencies [Line Items]
Number of indictments \| indictment					4
Malden Transportion v. Uber Technologies, Inc.
Loss Contingencies [Line Items]
Number of lawsuits \| lawsuit						7
Malden Transportion v. Uber Technologies, Inc. \| Subsequent Event
Loss Contingencies [Line Items]
Number of plaintiffs \| plaintiff	6

Variable Interest Entities (VIEs) - Narrative (Details)	1 Months Ended	3 Months Ended
Variable Interest Entities (VIEs) - Narrative (Details)	Mar. 31, 2018 USD ($) building subsidiary	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($) building subsidiary	Dec. 31, 2018 USD ($)
Variable Interest Entity [Line Items]
Equity method investments		$ 1,320,000,000		$ 1,312,000,000
Limited guarantee		50,000,000		50,000,000
Loss from equity method investment, net of tax		(6,000,000)	$ (3,000,000)
Event Center Office Partners, LLC
Variable Interest Entity [Line Items]
Loss from equity method investment, net of tax		0
Impairment of equity method investments		0
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets		119,000,000		$ 115,000,000
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Number of office buildings managed \| building	2		2
Number of wholly owned subsidiaries owning buildings \| subsidiary	2		2
Payments to acquire variable interest entity	$ 136,000,000
VIE, ownership percentage	45.00%
Equity method investments		136,000,000
Limited guarantee		$ 50,000,000
Variable Interest Entity, Not Primary Beneficiary \| LLC Partner One
Variable Interest Entity [Line Items]
VIE, ownership percentage	45.00%
Variable Interest Entity, Not Primary Beneficiary \| LLC Partner Two
Variable Interest Entity [Line Items]
VIE, ownership percentage	10.00%

Variable Interest Entities (VIEs) - Summary of Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Abstract]
Investment	$ 136	$ 78
Additional cash contribution	0	58
Limited guarantee	50	50
Maximum exposure to loss	$ 186	$ 186

Non-Controlling Interest (Details)	3 Months Ended
Non-Controlling Interest (Details)	Mar. 31, 2019
UBER Freight
Noncontrolling Interest [Line Items]
Ownership percentage	89.00%
Diluted ownership percentage	80.00%
JUMP E-Bike and E-Scooters
Noncontrolling Interest [Line Items]
Ownership percentage	100.00%
Diluted ownership percentage	81.00%
Option vesting period	4 years
Option vesting, fully-diluted capitalization percent	11.00%

Subsequent Events (Details) $ / shares in Units, shares in Thousands				1 Months Ended	3 Months Ended
	May 16, 2019 USD ($) $ / shares shares	May 14, 2019 USD ($) $ / shares shares	May 09, 2019 USD ($) shares	Apr. 30, 2019 USD ($) installment	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($) shares	Mar. 31, 2018 USD ($)	May 31, 2019 USD ($)	Dec. 31, 2018 USD ($) shares
Subsequent Event [Line Items]
Loss contingency accrual						$ 1,200,000,000			$ 1,100,000,000
Expected gain upon conversion of 2021 and 2022 Convertible Notes						$ 175,000,000	$ (367,000,000)
Common stock shares outstanding (in shares) \| shares						457,833			457,189
Share-based compensation expense						$ 11,000,000	$ 63,000,000
Forecast
Subsequent Event [Line Items]
Expected gain upon conversion of 2021 and 2022 Convertible Notes					$ 350,000,000
Independant Contractor Misclassification Claims \| Settled Litigation
Subsequent Event [Line Items]
Loss contingency accrual						$ 132,000,000			$ 132,000,000
Subsequent Event
Subsequent Event [Line Items]
Semi-annual installments				$ 300,000,000
Number of semi-annual installments \| installment				6
Employee incentive liabilities				$ 300,000,000
Common stock shares outstanding (in shares) \| shares		1,600,000
Share-based compensation expense			$ 3,600,000,000
Subsequent Event \| Independant Contractor Misclassification Claims \| Settled Litigation \| Minimum
Subsequent Event [Line Items]
Estimate of possible loss								$ 146,000,000
Subsequent Event \| Independant Contractor Misclassification Claims \| Settled Litigation \| Maximum
Subsequent Event [Line Items]
Estimate of possible loss								$ 170,000,000
Subsequent Event \| Private Placement
Subsequent Event [Line Items]
Stock issued during period (in shares) \| shares	11,000
Proceeds from issuance of common stock	$ 500,000,000
Subsequent Event \| IPO
Subsequent Event [Line Items]
Stock issued during period (in shares) \| shares		180,000
Stock price (in dollars per share) \| $ / shares	$ 45.00	$ 45.00
Proceeds from issuance of common stock		$ 8,000,000,000.0
Conversion of shares (in shares) \| shares		905,000
Exercise of common stock warrants (in shares) \| shares		200
Shares withheld to meet tax withholding requirements (in shares) \| shares			29,000
Shares withheld to meet tax withholding requirement, value			$ 1,300,000,000
Subsequent Event \| IPO \| Common Stock
Subsequent Event [Line Items]
Stock issued during period (in shares) \| shares			76,000
Subsequent Event \| IPO \| Holders of 2021 Convertible Notes and 2022 Convertible Notes
Subsequent Event [Line Items]
Conversion of shares (in shares) \| shares		94,000
Subsequent Event \| Over-Allotment Option
Subsequent Event [Line Items]
Shares issuable during period (in shares) \| shares		27,000
Payments of stock issuance costs		$ 106,000,000
Subsequent Event \| ATG Investment
Subsequent Event [Line Items]
Investment purchase agreement, aggregate investment amount				$ 1,000,000,000.0
Preferred investment, dividend rate				4.50%
Subsequent Event \| ATG Investment \| SoftBank Vision Fund, Toyota Motor Coporation, And DENSCO Corporation
Subsequent Event [Line Items]
Diluted ownership percentage				14.00%
Subsequent Event \| ATG Investment \| Uber Technologies, Inc.
Subsequent Event [Line Items]
Diluted ownership percentage				86.00%

Label	Element	Value
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	$ 5,828,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	8,209,000,000
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	9,000,000
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 9,000,000

Fair value method

Relative weighting

Key unobservable input

Financing transactions

Transaction price per share