XML 86 R68.htm IDEA: XBRL DOCUMENT
v3.20.4

LOANS - Schedule of Industry and Rate Sensitivity (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | $ 2,239,930 | $ 2,144,850
Computer programming, data processing & other computer related services |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 483,142 | 394,193
Management and public relations services |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 300,869 | 339,179
Industrial Inorganic Chemical |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 156,391 | 0
Public warehousing and storage |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 132,397 | 107,029
Metal cans & shipping containers |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 115,670 | 118,456
Offices and clinics of doctors of medicine |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 104,781 | 106,993
Surgical, medical, and dental instruments and supplies |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 83,161 | 102,182
Electronic components & accessories |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 78,129 | 24,000
Engineering, architectural & surveying |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 77,308 | 124,201
Miscellaneous Industrial & Commercial |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 77,163 | 78,908
Insurance agents, brokers and services |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 67,193 | 75,410
Research, development and testing services |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 62,008 | 45,610
Miscellaneous Food Preparations |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 58,857 | 0
Telephone communications |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 58,450 | 61,210
Miscellaneous equipment rental and leasing |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 49,587 | 49,776
Electrical work |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 41,128 | 43,175
Petroleum and petroleum products |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 33,890 | 24,923
Medical and dental laboratories |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 30,711 | 41,344
Schools and educational services, not elsewhere classified |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 29,040 | 19,586
Home health care services |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 28,587 | 29,361
Metal Forgings and Stampings |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 27,523 | 0
Legal Services |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 26,399 | 0
Grocery stores |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 22,895 | 23,248
Coating, engraving and allied services |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 19,484 | 47,249
Chemicals & Allied Products |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 14,686 | 15,002
Miscellaneous business services |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 12,980 | 164,033
Drugs |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 12,942 | 15,923
Mailing, reproduction, commercial art and photography, and stenographic |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 12,733 | 14,755
Machinery, Equipment & Supplies |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 12,096 | 0
Offices of clinics and other health practitioners |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 9,730 | 10,098
Nonferrous foundries (castings) |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 0 | 30,191
Motor vehicles and motor vehicle parts and supplies |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | 0 | 28,815
Miscellaneous plastic products |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Corporate debt | $ 0 | $ 10,000

X
- Definition For an unclassified balance sheet, this item represents firm holdings in fixed income or other debt securities issued by a corporation or other issuer not elsewhere specified in the taxonomy, which are categorized as held-to-maturity. The held-to-maturity category is for those securities that the entity has the positive intent and ability to hold until maturity. + References No definition available. + Details
Name: | nly_HeldToMaturitySecuritiesCorporateDebt
Namespace Prefix: | nly_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_ComputerProgrammingDataProcessingAndOtherComputerRelatedServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_ManagementAndPublicRelationsServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_IndustrialInorganicChemicalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_PublicWarehousingAndStorageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MetalCansAndShippingContainersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_OfficesAndClinicsOfDoctorsOfMedicineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_SurgicalMedicalAndDentalInstrumentsAndSuppliesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_ElectronicComponentsAccessoriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_EngineeringArchitecturalSurveyingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MiscellaneousHealthAndAlliedServicesNotElsewhereClassifiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_InsuranceAgentsBrokersAndServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_ResearchDevelopmentAndTestingServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MiscellaneousFoodPreparationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_TelephoneCommunicationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MiscellaneousEquipmentRentalAndLeasingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_ElectricalWorkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_PetroleumAndPetroleumProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MedicalAndDentalLaboratoriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_SchoolsAndEducationalServicesNotElsewhereClassifiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_HomeHealthCareServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MetalForgingsAndStampingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_LegalServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_GroceryStoresMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_CoatingEngravingandAlliedServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_ChemicalsAlliedProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MiscellaneousBusinessServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_DrugsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MailingReproductionCommercialArtAndPhotographyAndStenographicMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MachineryEquipmentAndSuppliesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_OfficesAndClinicsOfHealthPractitionersNotElsewhereClassifiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_NonferrousFoundriesCastingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MotorVehiclesAndMotorVehiclePartsAndSuppliesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=nly_MiscellaneousPlasticProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |