Beginning in the first quarter of 2019 we have two reportable segments: (1) Hotels, Media & Platform; and (2) Experiences & Dining. Our Hotels, Media & Platform reportable segment includes the following revenue sources: (1) Tripadvisor-branded hotels revenue – primarily consisting of Tripadvisor-branded hotel metasearch auction revenue, and to a lesser extent transaction revenue from our hotel instant booking feature, subscription-based advertising and hotel sponsored placements advertising revenue; and (2) Tripadvisor-branded display and platform revenue – consisting of Tripadvisor-branded display-based revenue. All remaining business units have been combined into and reported as “Other”, which includes Rentals, Flights/Cruises/Car, SmarterTravel, and Tripadvisor China, as none of these businesses meet the quantitative thresholds and other criteria to qualify as reportable segments, and therefore are combined and disclosed as Other. The nature of the services provided and revenue recognition policies are summarized by reported segment in “Note 4: Revenue Recognition.”

All direct general and administrative costs are included in the applicable segments and business units; however, all corporate general and administrative costs are included in the Hotels, Media & Platform reportable segment. In addition, the Hotels, Media & Platform reportable segment includes all Tripadvisor-related brand advertising expenses (primarily television advertising), and technical infrastructure and other costs supporting the Tripadvisor platform.

Adjusted EBITDA is our segment profit measure and a key measure used by our management and Board of Directors to understand and evaluate the operating performance of our business and on which internal budgets and forecasts are based and approved. We define Adjusted EBITDA as net income (loss) plus: (1) provision for income taxes; (2) other income (expense), net; (3) depreciation of property and equipment, including amortization of internal use software and website development; (4) amortization of intangible assets; (5) stock-based compensation and other stock-settled obligations; (6) goodwill, long-lived asset and intangible asset impairments; (7) legal reserves and settlements; (8) restructuring and other related reorganization costs; and (9) non-recurring expenses and income. During the fourth quarter of 2019, the Company revised its Adjusted EBITDA definition to exclude restructuring and other related reorganization costs, as the Company believes these costs are not directly tied to the ongoing core operations of our business. The Company believes that excluding these amounts better enables management and investors to compare financial results between periods as these costs may vary independent of business performance. This revision to our definition did not have a material impact to Adjusted EBITDA for any period prior to the year ended December 31, 2019; therefore, no reclassifications have been made to conform the prior periods to the current period presentation. This revision had no effect on consolidated GAAP results in any period.

The following tables present our segment information for the years ended December 31, 2019, 2018 and 2017 and includes a reconciliation of Adjusted EBITDA to Net Income. We record depreciation of property and equipment, including amortization of internal-use software and website development, amortization of intangible assets, stock-based compensation and other stock-settled obligations, legal reserves and settlements, restructuring and other related reorganization costs, other income (expense), net, other non-recurring expenses and income, net, and income taxes, which are excluded from segment operating performance, in corporate and unallocated. In addition, we do not report our assets, capital expenditures and related depreciation expense by segment as our CODM does not use this information to evaluate operating segments. Accordingly, we do not regularly provide such information by segment to our CODM. Intersegment revenue is not material and is included in Other.

	Year ended December 31, 2019
	Hotels, Media & Platform (1)		Experiences & Dining		Other (2)		Corporate and Unallocated			Total
	(in millions)
Revenue	$	939	$	456	$	165	$	—		$	1,560
Adjusted EBITDA		378		5		55		—			438
Depreciation								(93	)		(93	)
Amortization of intangible assets								(33	)		(33	)
Stock-based compensation								(124	)		(124	)
Restructuring and other related reorganization costs								(1	)		(1	)
Operating income											187
Other income, net											7
Income before income taxes											194
Provision for income taxes											(68	)
Net income										$	126

	Year ended December 31, 2018
	Hotels, Media & Platform (1)		Experiences & Dining		Other (2)		Corporate and Unallocated			Total
	(in millions)
Revenue	$	1,001	$	372	$	242	$	—		$	1,615
Adjusted EBITDA		329		48		45		—			422
Depreciation								(82	)		(82	)
Amortization of intangible assets								(34	)		(34	)
Stock-based compensation								(118	)		(118	)
Legal reserves and settlements								(5	)		(5	)
Operating income											183
Other expense, net											(10	)
Income before income taxes											173
Provision for income taxes											(60	)
Net income										$	113

	Year ended December 31, 2017
	Hotels, Media & Platform (1)		Experiences & Dining		Other (2)		Corporate and Unallocated			Total
	(in millions)
Revenue	$	1,022	$	264	$	270	$	—		$	1,556
Adjusted EBITDA		267		23		41		—			331
Depreciation								(79	)		(79	)
Amortization of intangible assets								(32	)		(32	)
Stock-based compensation								(96	)		(96	)
Operating income											124
Other expense, net											(14	)
Income before income taxes											110
Provision for income taxes (3)											(129	)
Net loss										$	(19	)

Our revenue sources within our Hotels, Media & Platform segment, which are Tripadvisor-branded hotels revenue and Tripadvisor-branded display and platform revenue; which along with our Experience & Dining and Other revenue source, comprise our products. Refer to “Note 4: Revenue Recognition” for our revenue by source.

The Company measures its geographic revenue information to the physical location of the Tripadvisor subsidiary which generates the revenue, which is consistent with our measurement of long-lived physical assets, or property and equipment, net. The geographic 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, experience operator or restaurant. For example, a reservation made through Tripadvisor.com at a hotel in the U.S. by a consumer in the U.S. could be part of the Company's non-U.S. revenue.

	Year ended December 31,
	2019		2018		2017
	(in millions)
Revenue
United States	$	821	$	835	$	802
United Kingdom		466		508		530
All other countries		273		272		224
Total revenue	$	1,560	$	1,615	$	1,556

The Company’s property and equipment, net for the United States and all other countries based on the geographic location of the assets consists of the following for the periods presented:

	December 31,
	2019		2018
	(in millions)
Property and equipment, net
United States	$	227	$	214
All other countries		43		39
Total	$	270	$	253