Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Additional Paid-in Capital [Member]	[1]	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, 2020	$ 35,334	$ 19,295		$ 24,334	$ (337)	$ (8,009)	$ 35,283	$ 51	$ 2,322
Net income	5,899	0		5,901	0	0	5,901	(2)	306
Dividends declared	(2,547)	0		(2,547)	0	0	(2,547)	0	0
Stock-based compensation	734	734		0	0	0	734	0	0
Issuance of common shares related to employee stock transactions	20	(387)		0	0	407	20	0	0
Employee tax withholdings related to employee stock transactions	(285)	0		0	0	(285)	(285)	0	0
Shares repurchased	(1,200)	0		0	0	(1,200)	(1,200)	0	0
Subscriptions (redemptions/distributions) — noncontrolling interest holders	67	0		0	0	0	0	67	1,408
Net consolidations (deconsolidations) of sponsored investment funds	(3)	0		0	0	0	0	(3)	(2,949)
Other comprehensive income (loss)	(213)	0		0	(213)	0	(213)	0	0
Balance at Dec. 31, 2021	37,806	19,642		27,688	(550)	(9,087)	37,693	113	1,087
Net income	5,184	0		5,178	0	0	5,178	6	(190)
Dividends declared	(2,990)	0		(2,990)	0	0	(2,990)	0	0
Stock-based compensation	708	708		0	0	0	708	0	0
Issuance of common shares related to employee stock transactions	38	(576)		0	0	614	38	0	0
Employee tax withholdings related to employee stock transactions	(457)	0		0	0	(457)	(457)	0	0
Shares repurchased	(1,875)	0		0	0	(1,875)	(1,875)	0	0
Subscriptions (redemptions/distributions) — noncontrolling interest holders	4	0		0	0	0	0	4	614
Net consolidations (deconsolidations) of sponsored investment funds	9	0		0	0	0	0	9	(602)
Other comprehensive income (loss)	(551)	0		0	(551)	0	(551)	0	0
Balance at Dec. 31, 2022	37,876	19,774		29,876	(1,101)	(10,805)	37,744	132	909
Net income	5,518	0		5,502	0	0	5,502	16	158
Dividends declared	(3,035)	0		(3,035)	0	0	(3,035)	0	0
Stock-based compensation	630	630		0	0	0	630	0	0
Issuance of common shares related to employee stock transactions	129	(569)		0	0	698	129	0	0
Employee tax withholdings related to employee stock transactions	(375)	0		0	0	(375)	(375)	0	0
Shares repurchased	(1,509)	0		0	0	(1,509)	(1,509)	0	0
Subscriptions (redemptions/distributions) — noncontrolling interest holders	(16)	0		0	0	0	0	(16)	1,643
Net consolidations (deconsolidations) of sponsored investment funds	21	0		0	0	0	0	21	(970)
Other comprehensive income (loss)	261	0		0	261	0	261	0	0
Balance at Dec. 31, 2023	$ 39,500	$ 19,835		$ 32,343	$ (840)	$ (11,991)	$ 39,347	$ 153	$ 1,740

[1] Amounts include $2 million of common stock at December 31, 2023, 2022, 2021 and 2020.