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, 2021				$ 1,536,569	$ 3,649	$ 20,324,780	$ 958,410	$ (9,653,582)		$ 25,499
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance					1,031	2,634,969
Acquisition of subsidiary					3	21,571
Unrealized gains (losses) on available-for-sale securities		$ (8,204,542)					(8,204,542)
Reclassification adjustment for net (gains) losses included in net income (loss)		3,537,236					3,537,236
Net income (loss) attributable to Annaly		1,725,325						1,725,325
Dividends declared on preferred stock	[1]							(110,623)
Dividends and dividend equivalents declared on common stock and stock-based awards	[1]							(1,504,353)
Net income (loss) attributable to noncontrolling interests		(1,095)								1,095
Equity contributions from (distributions to) noncontrolling interests										72,389
End of period at Dec. 31, 2022		11,369,426	$ 11,270,443	1,536,569	4,683	22,981,320	(3,708,896)	(9,543,233)		98,983
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance					315	673,378
Acquisition of subsidiary					3	17,693
Unrealized gains (losses) on available-for-sale securities		580,680					580,680
Reclassification adjustment for net (gains) losses included in net income (loss)		1,792,816					1,792,816
Net income (loss) attributable to Annaly		(1,643,171)						(1,643,171)
Dividends declared on preferred stock	[1]							(141,676)
Dividends and dividend equivalents declared on common stock and stock-based awards		(1,294,688)						(1,294,688)	[1]
Net income (loss) attributable to noncontrolling interests		(4,714)								4,714
Equity contributions from (distributions to) noncontrolling interests										(14,399)
End of period at Dec. 31, 2023		11,345,091	11,255,793	1,536,569	5,001	23,672,391	(1,335,400)	(12,622,768)		89,298
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance					780	1,557,536
Acquisition of subsidiary					3	27,789
Unrealized gains (losses) on available-for-sale securities		(244,278)					(244,278)
Reclassification adjustment for net (gains) losses included in net income (loss)		561,996					561,996
Net income (loss) attributable to Annaly		1,001,906						1,001,906
Dividends declared on preferred stock	[1]							(154,551)
Dividends and dividend equivalents declared on common stock and stock-based awards		(1,397,733)						(1,397,733)	[1]
Net income (loss) attributable to noncontrolling interests		(9,862)								9,862
Equity contributions from (distributions to) noncontrolling interests										(11,449)
End of period at Dec. 31, 2024		$ 12,696,952	$ 12,609,241	$ 1,536,569	$ 5,784	$ 25,257,716	$ (1,017,682)	$ (13,173,146)		$ 87,711

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