CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net interest income
Interest income	$ 645,615	$ 383,906	$ 1,301,465	$ 1,147,284
Interest expense	170,475	61,047	245,397	137,020
Net interest income	475,140	322,859	1,056,068	1,010,264
Net servicing income
Servicing and related income	55,685	10,519	90,400	19,748
Servicing and related expense	5,949	2,603	9,706	4,900
Net servicing income	49,736	7,916	80,694	14,848
Other income (loss)
Net gains (losses) on investments and other	(615,216)	20,207	(775,020)	58,612
Net gains (losses) on derivatives	1,015,643	(581,962)	2,657,671	587,421
Financing Receivable, Credit Loss, Expense (Reversal)	26,913	(494)	26,305	139,126
Business divestiture-related gains (losses)	(23,955)	1,527	(24,309)	(248,036)
Other, net	(5,486)	(6,241)	(2,428)	295
Total other income (loss)	397,899	(566,963)	1,882,219	537,418
General and administrative expenses
Compensation expense	22,243	32,013	55,245	63,531
Other general and administrative expenses	13,795	21,513	26,557	37,900
Total general and administrative expenses	36,038	53,526	81,802	101,431
Income (loss) before income taxes	886,737	(289,714)	2,937,179	1,461,099
Income taxes	23,420	5,134	49,968	4,813
Net income (loss)	863,317	(294,848)	2,887,211	1,456,286
Net income (loss) attributable to noncontrolling interests	(3,379)	794	(1,740)	1,115
Net income (loss) attributable to Annaly	866,696	(295,642)	2,888,951	1,455,171
Dividends on preferred stock	26,883	26,883	53,766	53,766
Net income (loss) available (related) to common stockholders	$ 839,813	$ (322,525)	$ 2,835,185	$ 1,401,405
Net income (loss) per share available (related) to common stockholders
Basic (in dollars per share)	$ 0.55	$ (0.23)	$ 1.90	$ 1.00
Diluted (in dollars per share)	$ 0.55	$ (0.23)	$ 1.90	$ 1.00
Weighted average number of common shares outstanding
Basic (in shares)	1,522,436,766	1,410,239,138	1,492,068,912	1,404,755,496
Diluted (in shares)	1,523,595,000	1,410,239,138	1,493,254,890	1,405,764,272
Other comprehensive income (loss)
Net income (loss)	$ 863,317	$ (294,848)	$ 2,887,211	$ 1,456,286
Unrealized gains (losses) on available-for-sale securities	(2,503,250)	(191,541)	(6,071,929)	(1,620,468)
Reclassification adjustment for net (gains) losses included in net income (loss)	657,806	(30,415)	802,593	26,408
Other comprehensive income (loss)	(1,845,444)	(221,956)	(5,269,336)	(1,594,060)
Comprehensive income (loss)	(982,127)	(516,804)	(2,382,125)	(137,774)
Comprehensive income (loss) attributable to noncontrolling interests	(3,379)	794	(1,740)	1,115
Comprehensive income (loss) attributable to Annaly	(978,748)	(517,598)	(2,380,385)	(138,889)
Dividends on preferred stock	26,883	26,883	53,766	53,766
Comprehensive income (loss) attributable to common stockholders	$ (1,005,631)	$ (544,481)	$ (2,434,151)	$ (192,655)