Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income		$ 1,515	$ 1,623
Other comprehensive income (loss):
Foreign currency translation adjustments	[1]	227	(93)
Comprehensive income (loss)		1,742	1,530
Less: Comprehensive income (loss) attributable to noncontrolling interests		5	50
Comprehensive income attributable to BlackRock, Inc.		$ 1,737	$ 1,480

[1] Amount for the three months ended March 31, 2025 includes a loss from a net investment hedge of $34 million (net of tax benefit of $11 million). Amount for the three months ended March 31, 2024 includes a gain from a net investment hedge of $13 million (net of tax expense of $4 million).