Business Overview	3 Months Ended
Mar. 31, 2018
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 and risk management services to institutional and retail clients worldwide. BlackRock’s diverse platform of alpha-seeking active, index and cash management investment strategies across asset classes enables the Company to tailor investment outcomes and asset allocation solutions for clients. Product offerings include single- and multi-asset portfolios investing in equities, fixed income, alternatives 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 investment trusts and other pooled investment vehicles. BlackRock also offers the investment and risk management technology platform, Aladdin^®, risk analytics, advisory and technology services and solutions to a broad base of institutional and wealth management clients. At March 31, 2018, The PNC Financial Services Group, Inc. (“PNC”) held 21.2% of the Company’s voting common stock and 21.7% of the Company’s capital stock, which includes outstanding common and nonvoting preferred stock.

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 and risk management services to institutional and retail clients worldwide.

BlackRock’s diverse platform of alpha-seeking active, index and cash management investment strategies across asset classes enables the Company to tailor investment outcomes and asset allocation solutions for clients. Product offerings include single- and multi-asset portfolios investing in equities, fixed income, alternatives 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 investment trusts and other pooled investment vehicles. BlackRock also offers the investment and risk management technology platform, Aladdin^®, risk analytics, advisory and technology services and solutions to a broad base of institutional and wealth management clients.

At March 31, 2018, The PNC Financial Services Group, Inc. (“PNC”) held 21.2% of the Company’s voting common stock and 21.7% of the Company’s capital stock, which includes outstanding common and nonvoting preferred stock.