Acquisitions - Summary of Business Acquisition, Pro Forma Information Combined Results of Operations (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Business Acquisition [Line Items]
Total revenue	$ 5,423	$ 4,805	$ 10,699	$ 9,533
Global Infrastructure Management, LLC [Member]
Business Acquisition [Line Items]
Total revenue		5,032		9,969
Net income attributable to BlackRock, Inc.		$ 1,455		$ 2,968

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details