Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, Beginning of Period	$ 21,175	$ 20,624
Acquisitions	1,810	446
Foreign currency translation and other adjustments	(29)	105
Allocation in the fourth quarter of 2020		0
Goodwill, End of Period	22,956	21,175
Google Inc.
Goodwill [Roll Forward]
Goodwill, Beginning of Period	0	19,921
Acquisitions	0	204
Foreign currency translation and other adjustments	0	46
Allocation in the fourth quarter of 2020		(20,171)
Goodwill, End of Period	0	0
Google Services
Goodwill [Roll Forward]
Goodwill, Beginning of Period	18,517	0
Acquisitions	1,325	53
Foreign currency translation and other adjustments	(16)	56
Allocation in the fourth quarter of 2020		18,408
Goodwill, End of Period	19,826	18,517
Google Cloud
Goodwill [Roll Forward]
Goodwill, Beginning of Period	1,957	0
Acquisitions	382	189
Foreign currency translation and other adjustments	(2)	5
Allocation in the fourth quarter of 2020		1,763
Goodwill, End of Period	2,337	1,957
Other Bets
Goodwill [Roll Forward]
Goodwill, Beginning of Period	701	703
Acquisitions	103	0
Foreign currency translation and other adjustments	(11)	(2)
Allocation in the fourth quarter of 2020		0
Goodwill, End of Period	$ 793	$ 701

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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 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.

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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 increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments 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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