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						0	0
Stock-based award activity						3	4,008
Unrealized gains (losses) on available-for-sale securities		$ (1,428,927)						(1,428,927)
Reclassification adjustment for net gains (losses) included in net income (loss)		56,823						56,823
Net income (loss) attributable to Annaly		1,750,813							1,750,813
Dividends declared on preferred stock	[1]								(26,883)
Dividends and dividend equivalents declared on common stock and share-based awards		(308,346)							(308,346)	[1]
Net income (loss) attributable to noncontrolling interests		(321)									321
Equity contributions from (distributions to) noncontrolling interests											(2,013)
End of period at Mar. 31, 2021		14,067,595		$ 14,055,807	1,536,569	13,985	19,754,826	2,002,231	(9,251,804)		11,788
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						8	6,096
Stock-based award activity						5	2,024
Unrealized gains (losses) on available-for-sale securities		(3,568,679)						(3,568,679)
Reclassification adjustment for net gains (losses) included in net income (loss)		144,787						144,787
Net income (loss) attributable to Annaly		2,022,255							2,022,255
Dividends declared on preferred stock	[1]								(26,883)
Dividends and dividend equivalents declared on common stock and share-based awards		(322,197)							(322,197)	[1]
Net income (loss) attributable to noncontrolling interests		(1,639)									1,639
Equity contributions from (distributions to) noncontrolling interests											24,390
End of period at Mar. 31, 2022		$ 11,478,770		$ 11,427,242	$ 1,536,569	$ 14,610	$ 20,321,952	$ (2,465,482)	$ (7,980,407)		$ 51,528

[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.