Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Goodwill	$ 20,654	$ 20,654
Family of Apps
Business Acquisition [Line Items]
Goodwill	19,250	19,250
Reality Labs
Business Acquisition [Line Items]
Goodwill	$ 1,410	$ 1,410