Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Additional Paid-in Capital [Member]		Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock Common [Member]	Total BlackRock Stockholders' Equity [Member]	Nonredeemable Noncontrolling Interests [Member]	Redeemable Noncontrolling Interests / Temporary Equity [Member]
Balance at Dec. 31, 2023	$ 39,500	$ 19,835	[1]	$ 32,343	$ (840)	$ (11,991)	$ 39,347	$ 153	$ 1,740
Net income	1,566	0	[1]	1,573	0	0	1,573	(7)	57
Dividends declared	(795)	0	[1]	(795)	0	0	(795)	0	0
Stock-based compensation	176	176	[1]	0	0	0	176	0	0
Issuance of common shares related to employee stock transactions	151	(392)	[1]	0	0	543	151	0	0
Employee tax withholdings related to employee stock transactions	(259)	0	[1]	0	0	(259)	(259)	0	0
Shares repurchased	(375)	0	[1]	0	0	(375)	(375)	0	0
Subscriptions (redemptions/distributions) — noncontrolling interest holders	24	0	[1]	0	0	0	0	24	406
Net consolidations (deconsolidations) of sponsored investment funds	0	0	[1]	0	0	0	0	0	(353)
Other comprehensive income (loss)	(93)	0	[1]	0	(93)	0	(93)	0	0
Balance Ending at Mar. 31, 2024	39,895	19,619	[1]	33,121	(933)	(12,082)	39,725	170	1,850
Balance at Dec. 31, 2024	47,664	13,448	[2]	35,611	(1,178)	(386)	47,495	169	1,691
Net income	1,509	0	[2]	1,510	0	0	1,510	(1)	6
Dividends declared	(838)	0		(838)	0	0	(838)	0	0
Stock-based compensation	241	241	[2]	0	0	0	241	0	0
Issuance of common shares related to employee stock transactions	58	57	[2]	0	0	1	58	0	0
Employee tax withholdings related to employee stock transactions	(282)	0	[2]	0	0	(282)	(282)	0	0
Shares repurchased	(375)	0	[2]	0	0	(375)	(375)	0	0
Subscriptions (redemptions/distributions) — noncontrolling interest holders	2	0	[2]	0	0	0	0	2	809
Net consolidations (deconsolidations) of sponsored investment funds	0	0	[2]	0	0	0	0	0	(522)
Other comprehensive income (loss)	227	0	[2]	0	227	0	227	0	0
Balance Ending at Mar. 31, 2025	$ 48,206	$ 13,746	[2]	$ 36,283	$ (951)	$ (1,042)	$ 48,036	$ 170	$ 1,984

[1] Amounts include $2 million of common stock at both March 31, 2024 and December 31, 2023.

[2] Amounts include $2 million of common stock at both March 31, 2025 and December 31, 2024.