XML 57 R46.htm IDEA: XBRL DOCUMENT
v3.23.1

SECURITIES - Summary of Residential Securities and CMBS (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 USD ($)
Debt Securities, Available-For-Sale [Roll Forward] |
Beginning balance January 1, 2023 | $ 65,789,907
Purchases | 8,470,557
Sales | (5,261,535)
Principal paydowns | (1,348,975)
(Amortization) / accretion | (56,209)
Fair value adjustment | 1,644,440
Ending balance March 31, 2023 | 69,238,185
Agency Securities |
Debt Securities, Available-For-Sale [Roll Forward] |
Beginning balance January 1, 2023 | 62,274,895
Purchases | 8,073,778
Sales | (4,984,037)
Principal paydowns | (1,261,026)
(Amortization) / accretion | (62,270)
Fair value adjustment | 1,582,194
Ending balance March 31, 2023 | 65,623,534
Residential Credit Securities |
Debt Securities, Available-For-Sale [Roll Forward] |
Beginning balance January 1, 2023 | 2,988,703
Purchases | 372,839
Sales | (225,907)
Principal paydowns | (87,915)
(Amortization) / accretion | 5,736
Fair value adjustment | 60,584
Ending balance March 31, 2023 | 3,114,040
Commercial Securities |
Debt Securities, Available-For-Sale [Roll Forward] |
Beginning balance January 1, 2023 | 526,309
Purchases | 23,940
Sales | (51,591)
Principal paydowns | (34)
(Amortization) / accretion | 325
Fair value adjustment | 1,662
Ending balance March 31, 2023 | $ 500,611

X
- Definition Accretion (Amortization) Of Debt Securities Available-For-Sale + References No definition available. + Details
Name: | nly_AccretionAmortizationOfDebtSecuritiesAvailableForSale
Namespace Prefix: | nly_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Debt Securities, Available-For-Sale [Roll Forward] + References No definition available. + Details
Name: | nly_DebtSecuritiesAvailableForSaleRollForward
Namespace Prefix: | nly_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payments to Acquire Debt Securities, Available-for-sale, Excluding Variable Interest Entity + References No definition available. + Details
Name: | nly_PaymentstoAcquireDebtSecuritiesAvailableforsaleExcludingVariableInterestEntity
Namespace Prefix: | nly_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Proceeds from Sale of Debt Securities, Available-for-sale, Excluding Variable Interest Entity + References No definition available. + Details
Name: | nly_ProceedsfromSaleofDebtSecuritiesAvailableforsaleExcludingVariableInterestEntity
Namespace Prefix: | nly_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after tax and adjustment, of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI https://asc.fasb.org/extlink&oid=126968391&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3151-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562 + Details
Name: | us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AgencySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |