CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net interest income
Interest income	$ 4,840,034	$ 3,731,581	$ 2,778,887
Interest expense	4,592,238	3,842,965	1,309,735
Net interest income	247,796	(111,384)	1,469,152
Net servicing income
Servicing and related income	485,406	364,157	246,926
Servicing and related expense	49,469	37,652	25,145
Net servicing income	435,937	326,505	221,781
Other income (loss)
Net gains (losses) on investments and other	(1,849,585)	(2,125,618)	(4,602,456)
Net gains (losses) on derivatives	2,269,301	400,092	4,859,174
Loan loss (provision) reversal	0	(219)	(20,660)
Business divestiture-related gains (losses)	0	0	(40,258)
Other, net	94,935	73,716	6,667
Total other income (loss)	514,651	(1,651,591)	243,787
General and administrative expenses
Compensation expense	130,403	119,592	112,703
Other general and administrative expenses	40,953	42,961	50,026
Total general and administrative expenses	171,356	162,553	162,729
Income (loss) before income taxes	1,027,028	(1,599,023)	1,771,991
Income taxes	15,260	39,434	45,571
Net income (loss)	1,011,768	(1,638,457)	1,726,420
Net income (loss) attributable to noncontrolling interests	9,862	4,714	1,095
Net income (loss) attributable to Annaly	1,001,906	(1,643,171)	1,725,325
Dividends on preferred stock	154,551	141,676	110,623
Net income (loss) available (related) to common stockholders	$ 847,355	$ (1,784,847)	$ 1,614,702
Net income (loss) per share available (related) to common stockholders
Basic (in dollars per share)	$ 1.62	$ (3.61)	$ 3.93
Diluted (in dollars per share)	$ 1.62	$ (3.61)	$ 3.92
Weighted average number of common shares outstanding
Basic (in shares)	521,737,554	494,541,323	411,348,484
Diluted (in shares)	522,747,610	494,541,323	411,621,758
Other comprehensive income (loss)
Net income (loss)	$ 1,011,768	$ (1,638,457)	$ 1,726,420
Unrealized gains (losses) on available-for-sale securities	(244,278)	580,680	(8,204,542)
Reclassification adjustment for net (gains) losses included in net income (loss)	561,996	1,792,816	3,537,236
Other comprehensive income (loss)	317,718	2,373,496	(4,667,306)
Comprehensive income (loss)	1,329,486	735,039	(2,940,886)
Comprehensive income (loss) attributable to noncontrolling interests	9,862	4,714	1,095
Comprehensive income (loss) attributable to Annaly	1,319,624	730,325	(2,941,981)
Comprehensive income (loss) attributable to common stockholders	$ 1,165,073	$ 588,649	$ (3,052,604)