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	$ 3,496	$ 19,761,304	$ 3,374,335	$ (10,667,388)		$ 13,480
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						128	469,206
Stock-based award activity						1	8,730
Unrealized gains (losses) on available-for-sale securities		$ (1,733,919)						(1,733,919)
Reclassification adjustment for net gains (losses) included in net income (loss)		(1,778)						(1,778)
Net income (loss) attributable to Annaly		1,974,415							1,974,415
Dividends declared on preferred stock	[1]								(80,649)
Dividends and dividend equivalents declared on common stock and share-based awards		(946,648)							(946,648)	[1]
Net income (loss) attributable to noncontrolling interests		(3,405)									3,405
Equity contributions from (distributions to) noncontrolling interests											3,180
End of period at Sep. 30, 2021		13,717,867		$ 13,697,802	1,536,569	3,625	20,239,240	1,638,638	(9,720,270)		20,065
Beginning of period at Jun. 30, 2021					1,536,569	3,610	20,189,524	1,780,275	(9,892,863)		22,061
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						14	48,894
Stock-based award activity						1	822
Unrealized gains (losses) on available-for-sale securities		(113,451)						(113,451)
Reclassification adjustment for net gains (losses) included in net income (loss)		(28,186)						(28,186)
Net income (loss) attributable to Annaly		519,244							519,244
Dividends declared on preferred stock	[1]								(26,883)
Dividends and dividend equivalents declared on common stock and share-based awards		(319,768)							(319,768)	[1]
Net income (loss) attributable to noncontrolling interests		(2,290)									2,290
Equity contributions from (distributions to) noncontrolling interests											(4,286)
End of period at Sep. 30, 2021		13,717,867		13,697,802	1,536,569	3,625	20,239,240	1,638,638	(9,720,270)		20,065
Beginning of period at Dec. 31, 2021		13,195,325	[2]		1,536,569	3,649	20,324,780	958,410	(9,653,582)		25,499
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						1,027	2,626,052
Stock-based award activity						3	16,833
Unrealized gains (losses) on available-for-sale securities		(8,650,438)						(8,650,438)
Reclassification adjustment for net gains (losses) included in net income (loss)		2,260,592						2,260,592
Net income (loss) attributable to Annaly		2,613,687							2,613,687
Dividends declared on preferred stock	[1]								(80,649)
Dividends and dividend equivalents declared on common stock and share-based awards		(1,090,814)							(1,090,814)	[1]
Net income (loss) attributable to noncontrolling interests		453									(453)
Equity contributions from (distributions to) noncontrolling interests											60,390
End of period at Sep. 30, 2022		10,951,555		10,866,119	1,536,569	4,679	22,967,665	(5,431,436)	(8,211,358)		85,436
Beginning of period at Jun. 30, 2022					1,536,569	4,023	21,293,146	(4,310,926)	(7,496,061)		63,149
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						655	1,670,825
Stock-based award activity						1	3,694
Unrealized gains (losses) on available-for-sale securities		(2,578,509)						(2,578,509)
Reclassification adjustment for net gains (losses) included in net income (loss)		1,457,999						1,457,999
Net income (loss) attributable to Annaly		(275,264)							(275,264)
Dividends declared on preferred stock	[1]								(26,883)
Dividends and dividend equivalents declared on common stock and share-based awards		(413,150)							(413,150)	[1]
Net income (loss) attributable to noncontrolling interests		(1,287)									1,287
Equity contributions from (distributions to) noncontrolling interests											21,000
End of period at Sep. 30, 2022		$ 10,951,555		$ 10,866,119	$ 1,536,569	$ 4,679	$ 22,967,665	$ (5,431,436)	$ (8,211,358)		$ 85,436

[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.