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, 2023					$ 1,536,569	$ 5,001	$ 23,672,391	$ (1,335,400)	$ (12,622,768)		$ 89,298
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						0	(48)
Stock-based award activity						3	1,344
Unrealized gains (losses) on available-for-sale securities		$ (281,869)						(281,869)
Reclassification adjustment for net (gains) losses included in net income (loss)		335,351						335,351
Net income (loss) attributable to Annaly		462,892							462,892
Dividends declared on preferred stock	[1]								(37,061)
Dividends and dividend equivalents declared on common stock and stock-based awards		(326,872)							(326,872)	[1]
Net income (loss) attributable to noncontrolling interests		(2,282)									2,282
Equity contributions from (distributions to) noncontrolling interests											(5,000)
End of period at Mar. 31, 2024		11,496,113		$ 11,409,533	1,536,569	5,004	23,673,687	(1,281,918)	(12,523,809)		86,580
Beginning of period at Dec. 31, 2024		12,696,952	[2]		1,536,569	5,784	25,257,716	(1,017,682)	(13,173,146)		87,711
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance						233	495,274
Stock-based award activity						6	(3,522)
Unrealized gains (losses) on available-for-sale securities		164,877						164,877
Reclassification adjustment for net (gains) losses included in net income (loss)		65,403						65,403
Net income (loss) attributable to Annaly		124,224							124,224
Dividends declared on preferred stock	[1]								(37,157)
Dividends and dividend equivalents declared on common stock and stock-based awards		(423,863)							(423,863)	[1]
Net income (loss) attributable to noncontrolling interests		(6,081)									6,081
Equity contributions from (distributions to) noncontrolling interests											(4,000)
End of period at Mar. 31, 2025		$ 13,084,508		$ 12,994,716	$ 1,536,569	$ 6,023	$ 25,749,468	$ (787,402)	$ (13,509,942)		$ 89,792

[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, 2024.