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Segment Information - Summary of Segment Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenue | $ 391 |  | $ 405 |  | $ 743 |  | $ 768 |
Adjusted EBITDA | 95 | [1] | 123 | [2] | 180 | [1] | 249 | [2]
Depreciation | (17) |  | (15) |  | (33) |  | (28) |
Amortization of intangible assets | (8) |  | (9) |  | (15) |  | (16) |
Stock-based compensation | (22) |  | (18) |  | (42) |  | (34) |
Other non-recurring expenses |  |  | (2) |  |  |  | (2) |
Operating income | 48 |  | 79 |  | 90 |  | 169 |
Other income (expense), net | (3) |  | 3 |  | (6) |  | (1) |
Income before income taxes | 45 |  | 82 |  | 84 |  | 168 |
Provision for income taxes | (11) |  | (24) |  | (22) |  | (47) |
Net income | 34 |  | 58 |  | 62 |  | 121 |
Operating Segments | Hotel Segment |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenue | 316 |  | 343 |  | 619 |  | 663 |
Adjusted EBITDA | 105 | [1] | 125 | [2] | 211 | [1] | 257 | [2]
Operating Segments | Non-Hotel Segment |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenue | 75 |  | 62 |  | 124 |  | 105 |
Adjusted EBITDA | (10) | [1] | (2) | [2] | (31) | [1] | (8) | [2]
Corporate and Unallocated |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Depreciation | (17) |  | (15) |  | (33) |  | (28) |
Amortization of intangible assets | (8) |  | (9) |  | (15) |  | (16) |
Stock-based compensation | $ (22) |  | (18) |  | $ (42) |  | (34) |
Other non-recurring expenses |  |  | $ (2) |  |  |  | $ (2) |
[1] | Includes allocated general and administrative expenses in our Hotel segment of $19 million and $41 million; and in our Non-Hotel segment of $9 million and $18 million for the three and six months ended June 30, 2016, respectively.
[2] | Includes allocated general and administrative expenses in our Hotel segment of $26 million and $46 million; and in our Non-Hotel segment of $9 million and $15 million for the three and six months ended June 30, 2015, respectively.

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- Definition 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; and (7) non-recurring expenses. + References No definition available. + Details
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