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Acquisitions and Goodwill - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2026
Intangible Asset, Goodwill and Other [Abstract] |  |
Reclassified to held-for-sale | $ 1,270 | $ 1,266

X
- Definition Goodwill, Reclassified To Held-for-Sale + References No definition available. + Details
Name: | meta_GoodwillReclassifiedToHeldForSale
Namespace Prefix: | meta_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration