v3.22.2.2
Document and Entity Information
Sep. 23, 2022
Document And Entity Information [Line Items]  
Entity Registrant Name ANNALY CAPITAL MANAGEMENT INC
Amendment Flag false
Entity Central Index Key 0001043219
Current Fiscal Year End Date --12-31
Document Type 8-K
Document Period End Date Sep. 23, 2022
Entity File Number 001-13447
Entity Incorporation State Country Code MD
Entity Tax Identification Number 22-3479661
Entity Address, Address Line One 1211 Avenue of the Americas
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10036
City Area Code (212)
Local Phone Number 696-0100
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Common Stock, par value $0.01 per share
Trading Symbol NLY
Security Exchange Name NYSE
A 6.95 Series F Fixedto Floating Rate Cumulative Redeemable Preferred Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 6.95% Series F Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Trading Symbol NLY.F
Security Exchange Name NYSE
A 6.50 Series G Fixedto Floating Rate Cumulative Redeemable Preferred Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 6.50% Series G Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Trading Symbol NLY.G
Security Exchange Name NYSE
A 6.75 Series I Fixedto Floating Rate Cumulative Redeemable Preferred Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 6.75% Series I Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Trading Symbol NLY.I
Security Exchange Name NYSE