XML 104 R92.htm IDEA: XBRL DOCUMENT
v3.21.1

SECURED FINANCING - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Debt Disclosure [Abstract] |  |  |
Netted amounts | $ 61,202,477 | $ 64,825,239 | [1]
Repurchase agreements - weighted average effective borrowing rates | 0.72% | 0.82% |
Repurchase agreements - weighted average remaining maturities | 88 days | 64 days |
Repurchase agreement amount | $ 1,600,000 |  |
Remaining capacity of repurchase agreement | 1,400,000 |  |
Secured financings and interest rate swaps - collateral held, estimated fair value | 66,900,000 | $ 70,600,000 |
Secured financings and interest rate swaps - collateral held, accrued interest | 183,900 | 196,900 |
Fair value of collateral received for reverse repurchase agreements | $ 300,000 | $ 250,000 |
[1] | Derived from the audited consolidated financial statements at December 31, 2020.

X
- Definition The fair value as of the balance sheet date of securities pledged as collateral that an institution holds on behalf of repurchase agreements, after giving effect for interest rate swaps. + References No definition available. + Details
Name: | nly_CollateralHeldOnRepurchaseAgreementsAfterEffectOfInterestRateSwapsFairValue
Namespace Prefix: | nly_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The accrued interest as of the balance sheet date of securities pledged as collateral that an institution holds on behalf of repurchase agreements. + References No definition available. + Details
Name: | nly_RepurchaseAgreementsAccruedInterest
Namespace Prefix: | nly_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This item represents the weighted average borrowing rates on repurchase agreements, after giving effect for interest rate swaps. + References No definition available. + Details
Name: | nly_RepurchaseAgreementsWeightedAverageBorrowingRates
Namespace Prefix: | nly_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Securities Sold under Agreements to Repurchase, Commitments Available + References No definition available. + Details
Name: | nly_SecuritiesSoldunderAgreementstoRepurchaseCommitmentsAvailable
Namespace Prefix: | nly_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Securities Sold under Agreements to Repurchase, Maximum Available Under Counterparty Arrangements + References No definition available. + Details
Name: | nly_SecuritiesSoldunderAgreementstoRepurchaseMaximumAvailableUnderCounterpartyArrangements
Namespace Prefix: | nly_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average maturity (weighted by amount of the agreement) of repurchase agreements with the counterparty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(B)(iii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
Name: | us-gaap_RepurchaseAgreementCounterpartyWeightedAverageMaturityOfAgreements1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of securities received as collateral against securities purchased under agreement to resell. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226013-175313 + Details
Name: | us-gaap_SecuritiesPurchasedUnderAgreementsToResellFairValueOfCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49176635&loc=d3e9760-107771 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(a)(i)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
Name: | us-gaap_SecuritiesSoldUnderAgreementsToRepurchase
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant