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SEGMENT REPORTING AND GEOGRAPHIC INFORMATION
 9 Months Ended
Sep. 30, 2025
Segment Reporting [Abstract]  
SEGMENT REPORTING AND GEOGRAPHIC INFORMATION SEGMENT REPORTING AND GEOGRAPHIC INFORMATION
The Company's portfolio of brands is organized into five operating segments. The Company determined its operating segments based on how its chief operating decision maker ("CODM"), who is the Chief Executive Officer and President, manages the business, makes operating decisions, and evaluates operating performance. The operating segments are aggregated into one reportable segment based on the similarity in economic characteristics, other qualitative factors, and the objectives and principles of ASC 280, Segment Reporting.

The CODM reviews revenues and an adjusted measure of EBITDA less additions to property and equipment ("Adjusted EBITDA less Capex") for each operating segment. The following table presents information for the Company's reportable segment. Other segment items include operating expenses such as general and administrative and information technology. See Note 2 to the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2024 for additional information on these expenses.
Three Months Ended
September 30,		Nine Months Ended
September 30,
(in millions)2025202420252024
Total revenues
$9,008 $7,994 $20,568 $18,268 
Marketing expenses2,340 2,151 6,256 5,700 
Sales and other expenses1,022 872 2,623 2,353 
Personnel expenses894 808 2,507 2,341 
Other segment items535 492 1,486 1,538 
Segment Adjusted EBITDA less Capex
$4,217 $3,671 $7,696 $6,336 

The following table presents the reconciliation of the Company's segment Adjusted EBITDA less Capex to Income before income taxes:
Three Months Ended
September 30,		Nine Months Ended
September 30,
(in millions)2025202420252024
Segment Adjusted EBITDA less Capex
$4,217 $3,671 $7,696 $6,336 
Additions to property and equipment
78 88 248 356 
Adjustment related to the Netherlands pension fund matter (1)
— — 123 — 
Accruals related to the fine imposed by the Spanish competition authority (1)
— — — 78 
Impact of certain indirect tax matters (2)
(45)(365)(45)(365)
Depreciation and amortization (3)
(160)(155)(472)(434)
Impairment (4)
(457)— (457)— 
Transformation costs (5)
(105)— (173)— 
Interest expense (3)
(301)(305)(1,368)(788)
Interest and dividend income (3)
248 327 723 863 
Net gains on equity securities (6)
92 32 116 27 
Foreign currency transaction losses on the remeasurement of certain Euro-denominated debt and accrued interest and gains on debt-related foreign currency derivative instruments (6)
(9)(329)(1,359)(94)
Loss on early extinguishment of debt (7)
(25)— (25)— 
Change in fair value of the conversion option of the convertible senior notes (7)
— — 163 — 
Other (8)
(64)(95)(201)(251)
Income before income taxes
$3,469 $2,869 $4,969 $5,728 
(1)    See Note 13 for additional information.
(2)    For the three and nine months ended September 30, 2024, the Company accrued an amount of $365 million related to the previously disclosed settlement with the Italian Tax Authorities for the withholding of income tax liabilities for certain short-term rental partners in Italy, which is reflected in "General and administrative" expenses in the Unaudited Consolidated Statements of Operations.
(3)    See the Unaudited Consolidated Statements of Operations.
(4)    See Note 8 for additional information.
(5)    See Note 17 for additional information.
(6)    See Note 15 for additional information.
(7)    See Note 9 for additional information.
(8)    Primarily consists of the expenses of corporate headquarters and certain other functional departments.
Stock-based compensation included in the determination of segment Adjusted EBITDA less Capex was $139 million and $406 million for the three and nine months ended September 30, 2025, respectively, and $128 million and $378 million for the three and nine months ended September 30, 2024, respectively.

Geographic Information

The Company's revenues from its businesses outside of the United States (the "U.S.") consists of the results of Booking.com and Agoda in their entirety and the results of the KAYAK and OpenTable businesses located outside of the U.S. This classification is independent of where the consumer resides, where the consumer is physically located while using the Company's services, or the location of the travel service provider or restaurant. For example, a reservation made through Booking.com at a hotel in New York by a consumer in the U.S. is part of the results of the Company's businesses outside of the U.S.
(in millions)U.S.
Outside of the U.S. (1)
Total Company
Total revenues for the three months ended September 30,
2025$677 $8,331 $9,008 
2024$662 $7,332 $7,994 
Total revenues for the nine months ended September 30,
2025$1,918 $18,650 $20,568 
2024$1,857 $16,411 $18,268 
(1)    Includes $7.6 billion and $16.7 billion for the three and nine months ended September 30, 2025, respectively, and $6.6 billion and $14.4 billion for the three and nine months ended September 30, 2024, respectively, attributed to an entity domiciled in the Netherlands.