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, 2022					$ 1,536,569	$ 4,683	$ 22,981,320	$ (3,708,896)	$ (9,543,233)		$ 98,983
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						253	562,338
Stock-based award activity						3	6,688
Unrealized gains (losses) on available-for-sale securities		$ 381,329						381,329
Reclassification adjustment for net (gains) losses included in net income (loss)		945,036						945,036
Net income (loss) attributable to Annaly		(677,223)							(677,223)
Dividends declared on preferred stock	[1]								(67,641)
Dividends and dividend equivalents declared on common stock and stock-based awards		(644,947)							(644,947)	[1]
Net income (loss) attributable to noncontrolling interests		918									(918)
Equity contributions from (distributions to) noncontrolling interests											13,001
End of period at Jun. 30, 2023		11,887,345		$ 11,776,279	1,536,569	4,939	23,550,346	(2,382,531)	(10,933,044)		111,066
Beginning of period at Mar. 31, 2023					1,536,569	4,939	23,543,091	(2,550,614)	(10,741,863)		116,911
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						0	(118)
Stock-based award activity						0	7,373
Unrealized gains (losses) on available-for-sale securities		(294,045)						(294,045)
Reclassification adjustment for net (gains) losses included in net income (loss)		462,128						462,128
Net income (loss) attributable to Annaly		167,033							167,033
Dividends declared on preferred stock	[1]								(35,766)
Dividends and dividend equivalents declared on common stock and stock-based awards		(322,448)							(322,448)	[1]
Net income (loss) attributable to noncontrolling interests		5,846									(5,846)
Equity contributions from (distributions to) noncontrolling interests											1
End of period at Jun. 30, 2023		11,887,345		11,776,279	1,536,569	4,939	23,550,346	(2,382,531)	(10,933,044)		111,066
Beginning of period at Dec. 31, 2023		11,345,091	[2]		1,536,569	5,001	23,672,391	(1,335,400)	(12,622,768)		89,298
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						6	10,893
Stock-based award activity						3	11,379
Unrealized gains (losses) on available-for-sale securities		(336,112)						(336,112)
Reclassification adjustment for net (gains) losses included in net income (loss)		514,585						514,585
Net income (loss) attributable to Annaly		453,409							453,409
Dividends declared on preferred stock	[1]								(74,219)
Dividends and dividend equivalents declared on common stock and stock-based awards		(654,613)							(654,613)	[1]
Net income (loss) attributable to noncontrolling interests		(2,932)									2,932
Equity contributions from (distributions to) noncontrolling interests											(10,450)
End of period at Jun. 30, 2024		11,262,904		11,181,124	1,536,569	5,010	23,694,663	(1,156,927)	(12,898,191)		81,780
Beginning of period at Mar. 31, 2024					1,536,569	5,004	23,673,687	(1,281,918)	(12,523,809)		86,580
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						6	10,941
Stock-based award activity						0	10,035
Unrealized gains (losses) on available-for-sale securities		(54,243)						(54,243)
Reclassification adjustment for net (gains) losses included in net income (loss)		179,234						179,234
Net income (loss) attributable to Annaly		(9,483)							(9,483)
Dividends declared on preferred stock	[1]								(37,158)
Dividends and dividend equivalents declared on common stock and stock-based awards		(327,741)							(327,741)	[1]
Net income (loss) attributable to noncontrolling interests		(650)									650
Equity contributions from (distributions to) noncontrolling interests											(5,450)
End of period at Jun. 30, 2024		$ 11,262,904		$ 11,181,124	$ 1,536,569	$ 5,010	$ 23,694,663	$ (1,156,927)	$ (12,898,191)		$ 81,780

[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, 2023.