Goodwill (Details) $ in Millions	9 Months Ended
Sep. 30, 2019 USD ($) segment
Goodwill and Intangible Assets Disclosure [Abstract]
Number of operating segments \| segment	5
Number of reportable segments \| segment	5
Goodwill [Roll Forward]
Goodwill	$ 153
Reallocation due to change in segments	0
Acquisitions	14
Dispositions	0
Goodwill	167
Rides
Goodwill [Roll Forward]
Goodwill	0
Reallocation due to change in segments	25
Acquisitions	0
Dispositions	0
Goodwill	25
Eats
Goodwill [Roll Forward]
Goodwill	0
Reallocation due to change in segments	13
Acquisitions	0
Dispositions	0
Goodwill	13
Freight
Goodwill [Roll Forward]
Goodwill	0
Reallocation due to change in segments	0
Acquisitions	0
Dispositions	0
Goodwill	0
Other Bets
Goodwill [Roll Forward]
Goodwill	0
Reallocation due to change in segments	100
Acquisitions	0
Dispositions	0
Goodwill	100
ATG and Other Technology Programs
Goodwill [Roll Forward]
Goodwill	0
Reallocation due to change in segments	15
Acquisitions	14
Dispositions	0
Goodwill	29
Previously Reported \| Other Bets
Goodwill [Roll Forward]
Goodwill	100
Reallocation due to change in segments	(100)
Acquisitions	0
Dispositions	0
Goodwill	0
Previously Reported \| Core Platform
Goodwill [Roll Forward]
Goodwill	53
Reallocation due to change in segments	(53)
Acquisitions	0
Dispositions	0
Goodwill	$ 0

Goodwill, Reallocation Due To Change In Segments

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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