Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Aggregate amortization expense for intangible assets	$ 9	$ 28	$ 35
Goodwill [Line Items]
Goodwill impairment	0	0
Goodwill [Roll Forward]
Beginning balance	4,285
Ending balance	4,178	4,285
Marketplace
Goodwill [Roll Forward]
Beginning balance	4,285	4,155
Goodwill Acquired	22	0
Adjustments	(129)	130
Ending balance	$ 4,178	$ 4,285	$ 4,155

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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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.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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