XML 129 R107.htm IDEA: XBRL DOCUMENT
v3.20.2

INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Income Taxes: |  |  |  |
REIT Taxable income distributed |  |  | 100.00% |
Income tax benefit | $ 2,055 | $ (5,915) | $ (24,647) | $ (3,334)
Taxable REIT Subsidiary |  |  |  |
Income Taxes: |  |  |  |
Income tax benefit | $ 2,100 | $ (5,900) | $ (24,600) | $ (3,300)

X
- Definition Income Taxes [Line Items] + References No definition available. + Details
Name: | nly_IncomeTaxesLineItems
Namespace Prefix: | nly_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of taxable income required to be distributed while operating as REIT. + References No definition available. + Details
Name: | nly_PercentageOfTaxableIncomeRequiredToBeDistributedWhileOperatingAsReit
Namespace Prefix: | nly_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=nly_TaxableREITSubsidiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |