Business Overview	12 Months Ended
Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Overview	1. Business Overview BlackRock, Inc. (together, with its subsidiaries, unless the context otherwise indicates, “BlackRock” or the “Company”) is a leading publicly traded investment management firm providing a broad range of investment management and technology services to institutional and retail clients worldwide. On July 1, 2025, BlackRock completed the acquisition of 100% of the business and assets of HPS Investment Partners (the "HPS Transaction" or "HPS"), a leading global credit investment manager, with substantially all consideration paid in Class B-2 common units ("Subco Units") of BlackRock Saturn Subco, LLC ("Subco"), a consolidated subsidiary of the Company. Concurrent with the acquisition, BlackRock Finance, Inc., Global Infrastructure Management, LLC ("GIP"), HPS, and their respective subsidiaries became wholly owned subsidiaries of Subco. See Note 3, Acquisitions, for information on the HPS Transaction. BlackRock’s diverse platform of alpha-seeking active, private markets, index and cash management investment strategies across asset classes enables the Company to offer choice and tailor investment and asset allocation solutions for clients. Product offerings include single- and multi-asset portfolios investing in equities, fixed income, private markets, liquid alternatives, digital assets, currencies and commodities, and money market instruments. Products are offered directly and through intermediaries in a variety of vehicles, including open-end and closed-end mutual funds, iShares® exchange-traded funds (“ETFs”), separate accounts, collective trust funds and other pooled investment vehicles. BlackRock also offers technology and subscription services, including the investment and risk management technology platform, Aladdin®, Aladdin WealthTM, eFront®, Preqin and Cachematrix®, as well as advisory services and solutions to a broad base of institutional and wealth management clients.

Business Overview

12 Months Ended

Dec. 31, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

1. Business Overview

BlackRock, Inc. (together, with its subsidiaries, unless the context otherwise indicates, “BlackRock” or the “Company”) is a leading publicly traded investment management firm providing a broad range of investment management and technology services to institutional and retail clients worldwide. On July 1, 2025, BlackRock completed the acquisition of 100% of the business and assets of HPS Investment Partners (the "HPS Transaction" or "HPS"), a leading global credit investment manager, with substantially all consideration paid in Class B-2 common units ("Subco Units") of BlackRock Saturn Subco, LLC ("Subco"), a consolidated subsidiary of the Company. Concurrent with the acquisition, BlackRock Finance, Inc., Global Infrastructure Management, LLC ("GIP"), HPS, and their respective subsidiaries became wholly owned subsidiaries of Subco. See Note 3, Acquisitions, for information on the HPS Transaction.

BlackRock’s diverse platform of alpha-seeking active, private markets, index and cash management investment strategies across asset classes enables the Company to offer choice and tailor investment and asset allocation solutions for clients. Product offerings include single- and multi-asset portfolios investing in equities, fixed income, private markets, liquid alternatives, digital assets, currencies and commodities, and money market instruments. Products are offered directly and through intermediaries in a variety of vehicles, including open-end and closed-end mutual funds, iShares® exchange-traded funds (“ETFs”), separate accounts, collective trust funds and other pooled investment vehicles. BlackRock also offers technology and subscription services, including the investment and risk management technology platform, Aladdin®, Aladdin WealthTM, eFront®, Preqin and Cachematrix®, as well as advisory services and solutions to a broad base of institutional and wealth management clients.