CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Total		Total stockholder’s equity	Preferred stock	Common stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated deficit		Noncontrolling interests
Beginning of period at Dec. 31, 2020					$ 1,536,569	$ 13,982	$ 19,750,818	$ 3,374,335	$ (10,667,388)		$ 13,480
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						456	419,970
Stock-based award activity						4	7,904
Unrealized gains (losses) on available-for-sale securities		$ (1,620,468)						(1,620,468)
Reclassification adjustment for net gains (losses) included in net income (loss)		26,408						26,408
Net income (loss) attributable to Annaly		1,455,171							1,455,171
Dividends declared on preferred stock	[1]								(53,766)
Dividends and dividend equivalents declared on common stock and share-based awards		(626,880)							(626,880)	[1]
Net income (loss) attributable to noncontrolling interests		(1,115)									1,115
Equity contributions from (distributions to) noncontrolling interests											7,466
End of period at Jun. 30, 2021		13,639,176		$ 13,617,115	1,536,569	14,442	20,178,692	1,780,275	(9,892,863)		22,061
Beginning of period at Mar. 31, 2021					1,536,569	13,985	19,754,826	2,002,231	(9,251,804)		11,788
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						456	419,970
Stock-based award activity						1	3,896
Unrealized gains (losses) on available-for-sale securities		(191,541)						(191,541)
Reclassification adjustment for net gains (losses) included in net income (loss)		(30,415)						(30,415)
Net income (loss) attributable to Annaly		(295,642)							(295,642)
Dividends declared on preferred stock	[1]								(26,883)
Dividends and dividend equivalents declared on common stock and share-based awards		(318,534)							(318,534)	[1]
Net income (loss) attributable to noncontrolling interests		(794)									794
Equity contributions from (distributions to) noncontrolling interests											9,479
End of period at Jun. 30, 2021		13,639,176		13,617,115	1,536,569	14,442	20,178,692	1,780,275	(9,892,863)		22,061
Beginning of period at Dec. 31, 2021		13,195,325	[2]		1,536,569	14,597	20,313,832	958,410	(9,653,582)		25,499
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						1,488	954,111
Stock-based award activity						7	13,134
Unrealized gains (losses) on available-for-sale securities		(6,071,929)						(6,071,929)
Reclassification adjustment for net gains (losses) included in net income (loss)		802,593						802,593
Net income (loss) attributable to Annaly		2,888,951							2,888,951
Dividends declared on preferred stock	[1]								(53,766)
Dividends and dividend equivalents declared on common stock and share-based awards		(677,664)							(677,664)	[1]
Net income (loss) attributable to noncontrolling interests		1,740									(1,740)
Equity contributions from (distributions to) noncontrolling interests											39,390
End of period at Jun. 30, 2022		11,089,900		11,026,751	1,536,569	16,092	21,281,077	(4,310,926)	(7,496,061)		63,149
Beginning of period at Mar. 31, 2022					1,536,569	14,610	20,321,952	(2,465,482)	(7,980,407)		51,528
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						1,480	948,015
Stock-based award activity						2	11,110
Unrealized gains (losses) on available-for-sale securities		(2,503,250)						(2,503,250)
Reclassification adjustment for net gains (losses) included in net income (loss)		657,806						657,806
Net income (loss) attributable to Annaly		866,696							866,696
Dividends declared on preferred stock	[1]								(26,883)
Dividends and dividend equivalents declared on common stock and share-based awards		(355,467)							(355,467)	[1]
Net income (loss) attributable to noncontrolling interests		3,379									(3,379)
Equity contributions from (distributions to) noncontrolling interests											15,000
End of period at Jun. 30, 2022		$ 11,089,900		$ 11,026,751	$ 1,536,569	$ 16,092	$ 21,281,077	$ (4,310,926)	$ (7,496,061)		$ 63,149

[1] (1) Refer to the “Capital Stock” Note for dividends per share for each class of shares.

[2] (1)Derived from the audited consolidated financial statements at December 31, 2021.