$NLY
ANNALY CAPITAL MANAGEMENT INC Stock $nly

$nly Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000162828021002510 Filed on February 19, 2021

Income Statement

Concept	2019 Q4	2019	2018
Revenue	$1.910B	$929.2M	$2.283B
YoY Change	-220.38%	-59.3%	-18.71%
Cost Of Revenue	$620.1M	$2.785B	$1.898B
YoY Change	5.67%	46.74%	88.21%
Gross Profit	$1.290B	-$1.856B	$385.1M
YoY Change	-159.35%	-581.87%	-78.61%
Gross Profit Margin	67.54%	-199.71%	16.87%
Selling, General & Admin	$73.40M	$301.6M	$329.9M
YoY Change	-4.8%	-8.58%	47.21%
% of Gross Profit	5.69%		85.67%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.000M	$32.00M	$72.00M
YoY Change	0.0%	-55.56%	315.32%
% of Gross Profit	0.62%		18.7%
Operating Expenses	$80.70M	$318.2M	$333.3M
YoY Change	0.25%	-4.53%	48.73%
Operating Profit	$1.209B	-$2.174B	$51.80M
YoY Change	-153.65%	-4296.72%	-96.71%
Interest Expense	$620.1M	$2.785B	$1.898B
YoY Change	5.67%	46.74%	88.21%
% of Operating Profit	51.28%		3663.82%
Other Income/Expense, Net	$42.66M	$106.5M	$109.9M
YoY Change	-18.56%	-3.07%
Pretax Income	$1.209B	-$2.174B	$51.77M
YoY Change	-153.65%	-4298.96%	-96.71%
Income Tax	-$594.0K	-$10.84M	-$2.375M
% Of Pretax Income	-0.05%		-4.59%
Net Earnings	$1.210B	-$2.163B	$54.41M
YoY Change	-153.65%	-4075.27%	-96.53%
Net Earnings / Revenue	63.34%	-232.77%	2.38%
Basic Earnings Per Share	$0.82	-$1.60	-$0.06
Diluted Earnings Per Share	$0.82	-$1.60	-$0.06
COMMON SHARES
Basic Shares Outstanding	1.430B shares	1.435B shares	1.210B shares
Diluted Shares Outstanding		1.435B shares	1.210B shares

Balance Sheet

Concept	2019 Q4	2019	2018
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.851B	$1.851B	$1.736B
YoY Change	6.62%	6.62%	145.54%
Cash & Equivalents	$1.851B	$1.851B	$1.736B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$5.000M	$5.000M	$69.00M
Other Receivables	$450.0M	$450.0M	$357.0M
Total Short-Term Assets	$2.306B	$2.306B	$2.162B
YoY Change	6.66%	6.66%	109.5%
LONG-TERM ASSETS
Property, Plant & Equipment	$741.0M	$741.0M	$739.0M
YoY Change	0.27%	0.27%	52.06%
Goodwill	$71.80M
YoY Change	0.0%
Intangibles	$20.96M
YoY Change	-27.83%
Long-Term Investments	$126.7B	$126.7B	$102.3B
YoY Change	23.89%	23.89%	4.33%
Other Assets
YoY Change
Total Long-Term Assets	$128.0B	$128.0B	$103.6B
YoY Change	23.51%	23.51%	2.88%
TOTAL ASSETS
Total Short-Term Assets	$2.306B	$2.306B	$2.162B
Total Long-Term Assets	$128.0B	$128.0B	$103.6B
Total Assets	$130.3B	$130.3B	$105.8B
YoY Change	23.17%	23.17%	3.96%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$497.0M	$497.0M	$571.0M
YoY Change	-12.96%	-12.96%	125.69%
Deferred Revenue
YoY Change
Short-Term Debt	$101.7B	$101.7B	$80.58B
YoY Change	26.26%	26.26%	3.71%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$103.1B	$103.1B	$82.13B
YoY Change	25.48%	25.48%	4.02%
LONG-TERM LIABILITIES
Long-Term Debt	$10.56B	$10.56B	$8.576B
YoY Change	23.18%	23.18%	20.47%
Other Long-Term Liabilities	$877.0M	$877.0M	$964.0M
YoY Change	-9.02%	-9.02%	18.14%
Total Long-Term Liabilities	$11.44B	$11.44B	$9.540B
YoY Change	19.93%	19.93%	20.23%
TOTAL LIABILITIES
Total Short-Term Liabilities	$103.1B	$103.1B	$82.13B
Total Long-Term Liabilities	$11.44B	$11.44B	$9.540B
Total Liabilities	$114.5B	$114.5B	$91.68B
YoY Change	24.9%	24.9%	5.5%
SHAREHOLDERS EQUITY
Retained Earnings	-$8.309B
YoY Change	84.91%
Common Stock	$14.30M
YoY Change	8.85%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$15.79B	$15.79B	$14.11B
YoY Change
Total Liabilities & Shareholders Equity	$130.3B	$130.3B	$105.8B
YoY Change	23.17%	23.17%	3.96%

Cashflow Statement

Concept	2019 Q4	2019	2018
OPERATING ACTIVITIES
Net Income	$1.210B	-$2.163B	$54.41M
YoY Change	-153.65%	-4075.27%	-96.53%
Depreciation, Depletion And Amortization	$8.000M	$32.00M	$72.00M
YoY Change	0.0%	-55.56%	315.32%
Cash From Operating Activities	$1.195B	-$1.200B	$2.622B
YoY Change	-398.0%	-145.75%	60.64%
INVESTING ACTIVITIES
Capital Expenditures	-$681.0M	-$1.299B	-$1.074B
YoY Change	477.12%	20.95%	108.14%
Acquisitions		$0.00	$258.3M
YoY Change		-100.0%
Other Investing Activities	-$196.0M	-$19.34B	$166.0M
YoY Change	-47.17%	-11752.41%	-101.17%
Cash From Investing Activities	-$876.0M	-$20.64B	-$908.4M
YoY Change	79.14%	2172.26%	-93.81%
FINANCING ACTIVITIES
Cash Dividend Paid		$1.689B	$1.541B
YoY Change		9.61%	13.87%
Common Stock Issuance & Retirement, Net		-$1.605B	-$1.532B
YoY Change		4.77%	-34.71%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-263.0M	$21.96B	-$684.4M
YoY Change	-117.03%	-3307.92%	-105.61%
NET CHANGE
Cash From Operating Activities	1.195B	-$1.200B	$2.622B
Cash From Investing Activities	-876.0M	-$20.64B	-$908.4M
Cash From Financing Activities	-263.0M	$21.96B	-$684.4M
Net Change In Cash	56.00M	$115.0M	$1.029B
YoY Change	-91.44%	-88.83%	-223.53%
FREE CASH FLOW
Cash From Operating Activities	$1.195B	-$1.200B	$2.622B
Capital Expenditures	-$681.0M	-$1.299B	-$1.074B
Free Cash Flow	$1.876B	$99.44M	$3.696B
YoY Change	-762.9%	-97.31%	72.05%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001043219
CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201613Member
CY2019	nly	Sale Of Stock Option To Purchase Additional Shares Period SaleOfStockOptionToPurchaseAdditionalSharesPeriod	P30D
CY2020Q1	nly	Monthly Management Fee Percentage Of Stockholders Equity Up To A Predetermined Amount Used In Calculating Total Management Fee MonthlyManagementFeePercentageOfStockholdersEquityUpToAPredeterminedAmountUsedInCalculatingTotalManagementFee	0.000875
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	1-13447
CY2020	dei	Entity Registrant Name EntityRegistrantName	ANNALY CAPITAL MANAGEMENT INC
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	22-3479661
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	1211 Avenue of the Americas
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	New York,
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10036
CY2020	dei	City Area Code CityAreaCode	212
CY2020	dei	Local Phone Number LocalPhoneNumber	696-0100
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	9200000000	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	1398502906	shares
CY2020Q4	us-gaap	Cash Collateral For Borrowed Securities CashCollateralForBorrowedSecurities	1137809000	USD
CY2019Q4	us-gaap	Cash Collateral For Borrowed Securities CashCollateralForBorrowedSecurities	1648545000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1243703000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1850729000	USD
CY2020Q4	us-gaap	Financial Instruments Owned Mortgages Mortgage Backed And Asset Backed Securities At Fair Value FinancialInstrumentsOwnedMortgagesMortgageBackedAndAssetBackedSecuritiesAtFairValue	75652396000	USD
CY2019Q4	us-gaap	Financial Instruments Owned Mortgages Mortgage Backed And Asset Backed Securities At Fair Value FinancialInstrumentsOwnedMortgagesMortgageBackedAndAssetBackedSecuritiesAtFairValue	114833580000	USD
CY2020Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	2231035000	USD
CY2019Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	3240583000	USD
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	3083821000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4462350000	USD
CY2020Q4	us-gaap	Servicing Asset ServicingAsset	100895000	USD
CY2019Q4	us-gaap	Servicing Asset ServicingAsset	378078000	USD
CY2020Q4	us-gaap	Financial Instruments Owned And Pledged As Collateral At Fair Value FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue	6910020000	USD
CY2019Q4	us-gaap	Financial Instruments Owned And Pledged As Collateral At Fair Value FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue	7002460000	USD
CY2020Q4	us-gaap	Real Estate Investments RealEstateInvestments	656314000	USD
CY2019Q4	us-gaap	Real Estate Investments RealEstateInvestments	725638000	USD
CY2020Q4	us-gaap	Derivative Assets DerivativeAssets	171134000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	113556000	USD
CY2020Q4	nly	Receivable For Investment Securities Sold ReceivableForInvestmentSecuritiesSold	15912000	USD
CY2019Q4	nly	Receivable For Investment Securities Sold ReceivableForInvestmentSecuritiesSold	4792000	USD
CY2020Q4	nly	Financing And Accrued Investment Income Receivable FinancingAndAccruedInvestmentIncomeReceivable	268073000	USD
CY2019Q4	nly	Financing And Accrued Investment Income Receivable FinancingAndAccruedInvestmentIncomeReceivable	449906000	USD
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	127341000	USD
CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	92772000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	225494000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	381220000	USD
CY2020Q4	us-gaap	Assets Assets	88455103000	USD
CY2019Q4	us-gaap	Assets Assets	130295081000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	64825239000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	101740728000	USD
CY2020Q4	us-gaap	Other Secured Financings OtherSecuredFinancings	917876000	USD
CY2019Q4	us-gaap	Other Secured Financings OtherSecuredFinancings	4455700000	USD
CY2020Q4	nly	Securitized Debt Of Consolidated Vie SecuritizedDebtOfConsolidatedVie	5652982000	USD
CY2019Q4	nly	Securitized Debt Of Consolidated Vie SecuritizedDebtOfConsolidatedVie	5622801000	USD
CY2020Q4	us-gaap	Participating Mortgage Loans Participation Liabilities Amount ParticipatingMortgageLoansParticipationLiabilitiesAmount	39198000	USD
CY2019Q4	us-gaap	Participating Mortgage Loans Participation Liabilities Amount ParticipatingMortgageLoansParticipationLiabilitiesAmount	0	USD
CY2020Q4	us-gaap	Loans Payable LoansPayable	426256000	USD
CY2019Q4	us-gaap	Loans Payable LoansPayable	485005000	USD
CY2020Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1033345000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	803866000	USD
CY2020Q4	nly	Payable For Investment Securities Purchased PayableForInvestmentSecuritiesPurchased	884069000	USD
CY2019Q4	nly	Payable For Investment Securities Purchased PayableForInvestmentSecuritiesPurchased	463387000	USD
CY2020Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	191116000	USD
CY2019Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	476335000	USD
CY2020Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	307613000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	357527000	USD
CY2020Q4	us-gaap	Accounts Payable And Other Accrued Liabilities AccountsPayableAndOtherAccruedLiabilities	155613000	USD
CY2019Q4	us-gaap	Accounts Payable And Other Accrued Liabilities AccountsPayableAndOtherAccruedLiabilities	93388000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	74433307000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	114498737000	USD
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	85150000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	85150000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	63500000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	63500000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	81900000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	81900000	shares
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	1536569000	USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	1982026000	USD
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2914850000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2914850000	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	1398240618	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	1398240618	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	1430106199	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	1430106199	shares
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	13982000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	14301000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	19750818000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	19966923000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	3374335000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2138191000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-10667388000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-8309424000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	14008316000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	15792017000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	13480000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	4327000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	14021796000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	15796344000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	88455103000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	130295081000	USD
CY2020	us-gaap	Interest Income Operating InterestIncomeOperating	2229625000	USD
CY2019	us-gaap	Interest Income Operating InterestIncomeOperating	3787297000	USD
CY2018	us-gaap	Interest Income Operating InterestIncomeOperating	3332563000	USD
CY2020	us-gaap	Interest Expense InterestExpense	899112000	USD
CY2019	us-gaap	Interest Expense InterestExpense	2784875000	USD
CY2018	us-gaap	Interest Expense InterestExpense	1897860000	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1330513000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1002422000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1434703000	USD
CY2020	nly	Gain Loss On Realized Interest Rate Swaps GainLossOnRealizedInterestRateSwaps	-207877000	USD
CY2019	nly	Gain Loss On Realized Interest Rate Swaps GainLossOnRealizedInterestRateSwaps	351375000	USD
CY2018	nly	Gain Loss On Realized Interest Rate Swaps GainLossOnRealizedInterestRateSwaps	100553000	USD
CY2020	nly	Gain Loss On Termination Of Interest Rate Swaps GainLossOnTerminationOfInterestRateSwaps	-1917628000	USD
CY2019	nly	Gain Loss On Termination Of Interest Rate Swaps GainLossOnTerminationOfInterestRateSwaps	-1442964000	USD
CY2018	nly	Gain Loss On Termination Of Interest Rate Swaps GainLossOnTerminationOfInterestRateSwaps	1409000	USD
CY2020	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-904532000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-1210276000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	424081000	USD
CY2020	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-3030037000	USD
CY2019	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-2301865000	USD
CY2018	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	526043000	USD
CY2020	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	661513000	USD
CY2019	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-47944000	USD
CY2018	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-1124448000	USD
CY2020	nly	Derivative Gain Losson Derivative Net Including Us Treasuries DerivativeGainLossonDerivativeNetIncludingUSTreasuries	756305000	USD
CY2019	nly	Derivative Gain Losson Derivative Net Including Us Treasuries DerivativeGainLossonDerivativeNetIncludingUSTreasuries	-680770000	USD
CY2018	nly	Derivative Gain Losson Derivative Net Including Us Treasuries DerivativeGainLossonDerivativeNetIncludingUSTreasuries	-403001000	USD
CY2020	nly	Unrealized Gain Loss On Interest Only Mortgage Backed Securities Mbs UnrealizedGainLossOnInterestOnlyMortgageBackedSecuritiesMBS	-303024000	USD
CY2019	nly	Unrealized Gain Loss On Interest Only Mortgage Backed Securities Mbs UnrealizedGainLossOnInterestOnlyMortgageBackedSecuritiesMBS	36021000	USD
CY2018	nly	Unrealized Gain Loss On Interest Only Mortgage Backed Securities Mbs UnrealizedGainLossOnInterestOnlyMortgageBackedSecuritiesMBS	-158082000	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	147581000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	16569000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3496000	USD
CY2020	nly	Nonoperating Income Expense Pre Derivative Instruments NonoperatingIncomeExpensePreDerivativeInstruments	967213000	USD
CY2019	nly	Nonoperating Income Expense Pre Derivative Instruments NonoperatingIncomeExpensePreDerivativeInstruments	-709262000	USD
CY2018	nly	Nonoperating Income Expense Pre Derivative Instruments NonoperatingIncomeExpensePreDerivativeInstruments	-1689027000	USD
CY2020	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-2062824000	USD
CY2019	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-3011127000	USD
CY2018	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-1162984000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	109927000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	53314000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	136413000	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	131685000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	170628000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	179841000	USD
CY2020	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	107513000	USD
CY2019	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	131006000	USD
CY2018	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	150032000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	239198000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	301634000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	329873000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-918195000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-2173926000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	51773000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-28423000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-10835000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2375000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	-889772000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-2163091000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	54148000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1391000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-226000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-260000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-891163000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-2162865000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	54408000	USD
CY2020	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	142036000	USD
CY2019	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	136576000	USD
CY2018	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	129312000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-1033199000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2299441000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-74904000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.73
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.60
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.06
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.73
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.60
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.06
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1414659439	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1434912682	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1209601809	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1414659439	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1434912682	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1209601809	shares
CY2020	us-gaap	Profit Loss ProfitLoss	-889772000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-2163091000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	54148000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	2012878000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	4135862000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-2004166000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	776734000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	17806000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-1150321000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1236144000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4118056000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-853845000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	346372000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1954965000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-799697000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	1391000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-226000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-260000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	344981000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1955191000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-799437000	USD
CY2020	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	142036000	USD
CY2019	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	136576000	USD
CY2018	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	129312000	USD
CY2020	nly	Comprehensive Income Loss Attributable To Common Stock Holders ComprehensiveIncomeLossAttributableToCommonStockHolders	202945000	USD
CY2019	nly	Comprehensive Income Loss Attributable To Common Stock Holders ComprehensiveIncomeLossAttributableToCommonStockHolders	1818615000	USD
CY2018	nly	Comprehensive Income Loss Attributable To Common Stock Holders ComprehensiveIncomeLossAttributableToCommonStockHolders	-928749000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	14021796000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	15796344000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	14117801000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	-889772000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-2163091000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	54148000	USD
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1371178000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1113273000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-692811000	USD
CY2020	nly	Amortization Of Securitized Debt Premiums And Discounts Net AmortizationOfSecuritizedDebtPremiumsAndDiscountsNet	11576000	USD
CY2019	nly	Amortization Of Securitized Debt Premiums And Discounts Net AmortizationOfSecuritizedDebtPremiumsAndDiscountsNet	11854000	USD
CY2018	nly	Amortization Of Securitized Debt Premiums And Discounts Net AmortizationOfSecuritizedDebtPremiumsAndDiscountsNet	3439000	USD
CY2020	nly	Depreciation Depletion And Amortization Excluding Amortization Of Debt Premiums And Discounts Deferred Financing Costs And Discounts Of Investments DepreciationDepletionAndAmortizationExcludingAmortizationOfDebtPremiumsAndDiscountsDeferredFinancingCostsAndDiscountsOfInvestments	41357000	USD
CY2019	nly	Depreciation Depletion And Amortization Excluding Amortization Of Debt Premiums And Discounts Deferred Financing Costs And Discounts Of Investments DepreciationDepletionAndAmortizationExcludingAmortizationOfDebtPremiumsAndDiscountsDeferredFinancingCostsAndDiscountsOfInvestments	31559000	USD
CY2018	nly	Depreciation Depletion And Amortization Excluding Amortization Of Debt Premiums And Discounts Deferred Financing Costs And Discounts Of Investments DepreciationDepletionAndAmortizationExcludingAmortizationOfDebtPremiumsAndDiscountsDeferredFinancingCostsAndDiscountsOfInvestments	72364000	USD
CY2020	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	661513000	USD
CY2019	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-47944000	USD
CY2018	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-1123969000	USD
CY2020	nly	Gain Loss On Investments Debt And Derivatives GainLossOnInvestmentsDebtAndDerivatives	-2368879000	USD
CY2019	nly	Gain Loss On Investments Debt And Derivatives GainLossOnInvestmentsDebtAndDerivatives	-1855025000	USD
CY2018	nly	Gain Loss On Investments Debt And Derivatives GainLossOnInvestmentsDebtAndDerivatives	-136673000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-7072000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-6893000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-2840000	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	147581000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	16569000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3496000	USD
CY2020	nly	Payments For Purchase Of Loans Operating Activities PaymentsForPurchaseOfLoansOperatingActivities	147833000	USD
CY2019	nly	Payments For Purchase Of Loans Operating Activities PaymentsForPurchaseOfLoansOperatingActivities	250348000	USD
CY2018	nly	Payments For Purchase Of Loans Operating Activities PaymentsForPurchaseOfLoansOperatingActivities	227871000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	168716000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	282693000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	97913000	USD
CY2020	nly	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	-1958131000	USD
CY2019	nly	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	-1939634000	USD
CY2018	nly	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	480216000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-249778000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	39880000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-98104000	USD
CY2020	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	-159320000	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	295640000	USD
CY2019	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	85951000	USD
CY2018	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	19563000	USD
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-285219000	USD
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-94593000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-31870000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	31838000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-185283000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	527967000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1199557000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2622018000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	32676856000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	63465822000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	44795176000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	52639778000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	25606504000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	17199893000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	11488342000	USD
CY2020	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	2257314000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	33256888000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	19571476000	USD
CY2019	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	4126123000	USD
CY2018	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	3149224000	USD
CY2020	us-gaap	Proceeds From Sale Of Held To Maturity Securities ProceedsFromSaleOfHeldToMaturitySecurities	624026000	USD
CY2019	us-gaap	Proceeds From Sale Of Held To Maturity Securities ProceedsFromSaleOfHeldToMaturitySecurities	365787000	USD
CY2018	us-gaap	Proceeds From Sale Of Held To Maturity Securities ProceedsFromSaleOfHeldToMaturitySecurities	150059000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	2222500000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	3139084000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	2107689000	USD
CY2020	us-gaap	Payments To Acquire Mortgage Servicing Rights Msr PaymentsToAcquireMortgageServicingRightsMSR	0	USD
CY2019	us-gaap	Payments To Acquire Mortgage Servicing Rights Msr PaymentsToAcquireMortgageServicingRightsMSR	0	USD
CY2018	us-gaap	Payments To Acquire Mortgage Servicing Rights Msr PaymentsToAcquireMortgageServicingRightsMSR	381000	USD
CY2020	us-gaap	Proceeds From Sale Of Mortgage Servicing Rights Msr ProceedsFromSaleOfMortgageServicingRightsMSR	72160000	USD
CY2019	us-gaap	Proceeds From Sale Of Mortgage Servicing Rights Msr ProceedsFromSaleOfMortgageServicingRightsMSR	0	USD
CY2018	us-gaap	Proceeds From Sale Of Mortgage Servicing Rights Msr ProceedsFromSaleOfMortgageServicingRightsMSR	0	USD
CY2020	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	7450000	USD
CY2019	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	39144000	USD
CY2018	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	22722000	USD
CY2020	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	149600000	USD
CY2019	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	24955000	USD
CY2018	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	0	USD
CY2020	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	58800000000	USD
CY2019	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	98339755000	USD
CY2018	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	85318562000	USD
CY2020	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	58800000000	USD
CY2019	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	97689715000	USD
CY2018	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	85030351000	USD
CY2020	nly	Proceeds From Unconsolidated Joint Venture Excess Of Cumulative Earnings ProceedsFromUnconsolidatedJointVentureExcessOfCumulativeEarnings	7590000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	40351774000	USD
CY2019	nly	Proceeds From Unconsolidated Joint Venture Excess Of Cumulative Earnings ProceedsFromUnconsolidatedJointVentureExcessOfCumulativeEarnings	3155000	USD
CY2018	nly	Proceeds From Unconsolidated Joint Venture Excess Of Cumulative Earnings ProceedsFromUnconsolidatedJointVentureExcessOfCumulativeEarnings	26228000	USD
CY2020	nly	Cash Acquired Paid From Asset Acquisition CashAcquiredPaidFromAssetAcquisition	6264000	USD
CY2019	nly	Cash Acquired Paid From Asset Acquisition CashAcquiredPaidFromAssetAcquisition	0	USD
CY2018	nly	Cash Acquired Paid From Asset Acquisition CashAcquiredPaidFromAssetAcquisition	-258334000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-20641671000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-908420000	USD
CY2020	nly	Proceeds From Repurchase Agreements ProceedsFromRepurchaseAgreements	2776331362000	USD
CY2019	nly	Proceeds From Repurchase Agreements ProceedsFromRepurchaseAgreements	5470733256000	USD
CY2018	nly	Proceeds From Repurchase Agreements ProceedsFromRepurchaseAgreements	5117155986000	USD
CY2020	nly	Principal Payments On Repurchase Agreements PrincipalPaymentsOnRepurchaseAgreements	2816805618000	USD
CY2019	nly	Principal Payments On Repurchase Agreements PrincipalPaymentsOnRepurchaseAgreements	5449836013000	USD
CY2018	nly	Principal Payments On Repurchase Agreements PrincipalPaymentsOnRepurchaseAgreements	5116952444000	USD
CY2020	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	2385374000	USD
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	3444055000	USD
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	920142000	USD
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	1238962000	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	2031959000	USD
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	1384333000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	553000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	12228000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	1072000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1175000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1829025000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1532356000	USD
CY2020	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	460000000	USD
CY2019	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	230000000	USD
CY2018	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	412500000	USD
CY2020	nly	Proceeds From Participating Mortgage Loans ProceedsFromParticipatingMortgageLoans	38741000	USD
CY2019	nly	Proceeds From Participating Mortgage Loans ProceedsFromParticipatingMortgageLoans	0	USD
CY2018	nly	Proceeds From Participating Mortgage Loans ProceedsFromParticipatingMortgageLoans	0	USD
CY2020	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-60980000	USD
CY2019	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-26202000	USD
CY2018	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-716000	USD
CY2020	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	7762000	USD
CY2019	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-1136000	USD
CY2018	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-971000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	209418000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	223574000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	1475650000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	1689016000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	1540886000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-41486767000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	21956208000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-684438000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-607026000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	114980000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1029160000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1850729000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1735749000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	706589000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1243703000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1850729000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1735749000	USD
CY2020	us-gaap	Proceeds From Interest Received ProceedsFromInterestReceived	3681826000	USD
CY2019	us-gaap	Proceeds From Interest Received ProceedsFromInterestReceived	4811218000	USD
CY2018	us-gaap	Proceeds From Interest Received ProceedsFromInterestReceived	3894478000	USD
CY2020	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	4643000	USD
CY2019	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	8395000	USD
CY2018	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	7564000	USD
CY2020	nly	Interest Paid Excluding Interest Paid On Interest Rate Swaps InterestPaidExcludingInterestPaidOnInterestRateSwaps	1166977000	USD
CY2019	nly	Interest Paid Excluding Interest Paid On Interest Rate Swaps InterestPaidExcludingInterestPaidOnInterestRateSwaps	2902644000	USD
CY2018	nly	Interest Paid Excluding Interest Paid On Interest Rate Swaps InterestPaidExcludingInterestPaidOnInterestRateSwaps	1726887000	USD
CY2020	nly	Interest Paid Net Interest Rate Derivative InterestPaidNetInterestRateDerivative	296621000	USD
CY2019	nly	Interest Paid Net Interest Rate Derivative InterestPaidNetInterestRateDerivative	-323028000	USD
CY2020	nly	Noncash Or Part Noncash Acquisition Variable Interest Entity Derecognition Of Assets NoncashOrPartNoncashAcquisitionVariableInterestEntityDerecognitionOfAssets	1222221000	USD
CY2018	nly	Interest Paid Net Interest Rate Derivative InterestPaidNetInterestRateDerivative	-1894000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1515000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2284000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-295000	USD
CY2020Q4	nly	Receivable For Investment Securities Sold ReceivableForInvestmentSecuritiesSold	15912000	USD
CY2019Q4	nly	Receivable For Investment Securities Sold ReceivableForInvestmentSecuritiesSold	4792000	USD
CY2018Q4	nly	Receivable For Investment Securities Sold ReceivableForInvestmentSecuritiesSold	68779000	USD
CY2020Q4	nly	Payable For Investment Securities Purchased PayableForInvestmentSecuritiesPurchased	884069000	USD
CY2019Q4	nly	Payable For Investment Securities Purchased PayableForInvestmentSecuritiesPurchased	463387000	USD
CY2018Q4	nly	Payable For Investment Securities Purchased PayableForInvestmentSecuritiesPurchased	583036000	USD
CY2020	nly	Net Change In Unrealized Gain Loss On Availableforsale Securities And Interest Rate Swaps Net Of Reclassification Adjustment NetChangeInUnrealizedGainLossOnAvailableforsaleSecuritiesAndInterestRateSwapsNetOfReclassificationAdjustment	1236144000	USD
CY2019	nly	Net Change In Unrealized Gain Loss On Availableforsale Securities And Interest Rate Swaps Net Of Reclassification Adjustment NetChangeInUnrealizedGainLossOnAvailableforsaleSecuritiesAndInterestRateSwapsNetOfReclassificationAdjustment	4118056000	USD
CY2018	nly	Net Change In Unrealized Gain Loss On Availableforsale Securities And Interest Rate Swaps Net Of Reclassification Adjustment NetChangeInUnrealizedGainLossOnAvailableforsaleSecuritiesAndInterestRateSwapsNetOfReclassificationAdjustment	-853845000	USD
CY2020Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	307613000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	357527000	USD
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	394129000	USD
CY2019	nly	Noncash Or Part Noncash Acquisition Variable Interest Entity Derecognition Of Assets NoncashOrPartNoncashAcquisitionVariableInterestEntityDerecognitionOfAssets	0	USD
CY2018	nly	Noncash Or Part Noncash Acquisition Variable Interest Entity Derecognition Of Assets NoncashOrPartNoncashAcquisitionVariableInterestEntityDerecognitionOfAssets	0	USD
CY2020	nly	Noncash Or Part Noncash Acquisition Variable Interest Entity Derecognition Of Securitized Debt NoncashOrPartNoncashAcquisitionVariableInterestEntityDerecognitionOfSecuritizedDebt	1141311000	USD
CY2019	nly	Noncash Or Part Noncash Acquisition Variable Interest Entity Derecognition Of Securitized Debt NoncashOrPartNoncashAcquisitionVariableInterestEntityDerecognitionOfSecuritizedDebt	0	USD
CY2018	nly	Noncash Or Part Noncash Acquisition Variable Interest Entity Derecognition Of Securitized Debt NoncashOrPartNoncashAcquisitionVariableInterestEntityDerecognitionOfSecuritizedDebt	0	USD
CY2020	nly	Number Of Investment Groups NumberOfInvestmentGroups	4	numberOfInvestmentGroups
CY2020	us-gaap	Basis Of Accounting BasisOfAccounting	<div style="margin-bottom:5pt;margin-top:5pt;text-align:justify"><table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:99.415%"><tr><td style="width:1.0%"/><td style="width:98.900%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:justify"><span style="color:#00316c;font-family:'Times New Roman',sans-serif;font-size:11pt;font-weight:700;line-height:100%">2. BASIS OF PRESENTATION</span></div></td></tr><tr style="height:5pt"><td colspan="3" style="border-top:1pt solid #00316c;padding:0 1pt"/></tr></table></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The accompanying consolidated financial statements and related notes of the Company have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of the consolidated financial statements requires management to make estimates and assumptions that affect the reported balance sheet amounts and/or disclosures at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from those estimates. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain line items in the Company’s Consolidated Statements of Cash Flows were aggregated to simplify presentation. Prior periods have been adjusted to conform to the current presentation.</span></div>
CY2020	us-gaap	Revenue Recognition Interest RevenueRecognitionInterest	<div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Interest Income - </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company recognizes interest income primarily on Residential Securities, residential mortgage loans, commercial investments and reverse repurchase agreements. Interest accrued but not paid is recognized as Interest receivable on the Consolidated Statements of Financial Condition. Interest income is presented as a separate line item on the Consolidated Statements of Comprehensive Income (Loss). Refer to the “Interest Income and Interest Expense” Note for further discussion.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For its securities, the Company recognizes coupon income, which is a component of interest income, based upon the outstanding principal amounts of the financial instruments and their contractual terms. In addition, the Company amortizes or accretes premiums or discounts into interest income for its Agency mortgage-backed securities (other than interest-only securities, multifamily and reverse mortgages), taking into account estimates of future principal prepayments in the calculation of the effective yield. The Company recalculates the effective yield as differences between anticipated and actual prepayments occur. Using third-party model and market information to project future cash flows and expected remaining lives of securities, the effective interest rate determined for each security is applied as if it had been in place from the date of the security’s acquisition. The amortized cost of the security is then adjusted to the amount that would have existed had the new effective yield been applied since the acquisition date, which results in a cumulative premium amortization adjustment in each period. The adjustment to amortized cost is offset with a charge or credit to interest income. Changes in interest rates and other market factors will impact prepayment speed projections and the amount of premium amortization recognized in any given period.</span></div><div style="margin-bottom:3pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Premiums or discounts associated with the purchase of Agency interest-only securities, reverse mortgages and residential credit securities are amortized or accreted into interest income based upon current expected future cash flows with any adjustment to yield made on a prospective basis.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Premiums and discounts associated with the purchase of residential mortgage loans and with those transferred or pledged to securitization trusts are primarily amortized or accreted into interest income over their estimated remaining lives using the effective interest rates inherent in the estimated cash flows from the mortgage loans. Amortization of premiums and accretion of discounts are presented in Interest income in the Consolidated Statements of Comprehensive Income (Loss). </span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If collection of a loan’s principal or interest is in doubt or the loan is 90 days or more past due, interest income is not accrued. For nonaccrual status loans carried at fair value or held for sale, interest is not accrued but is recognized on a cash basis. For nonaccrual status loans carried at amortized cost, if collection of principal is not in doubt but collection of interest is in doubt, interest income is recognized on a cash basis. If collection of principal is in doubt, any interest received is applied against principal until collectability of the remaining balance is no longer in doubt; at that point, any interest income is recognized on a cash basis. Generally, a loan is returned to accrual status when the borrower has resumed paying the full amount of the scheduled contractual obligation, if all principal and interest amounts contractually due are reasonably assured of repayment within a reasonable period of time and there is a sustained period of repayment performance by the borrower. Refer to the “Interest Income and Interest Expense” Note for further discussion on interest.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company has made an accounting policy election not to measure an allowance for loans losses for accrued interest receivable. If interest receivable is deemed to be uncollectible or not collected within 90 days of its contractual due date for commercial loans or 120 days for corporate debt carried at amortized cost, it is written off through a reversal of interest income. Any interest written off that is recovered is recognized as interest income.</span></div>
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	114833580000	USD
CY2020	nly	Paymentsto Acquire Debt Securities Availableforsale Excluding Variable Interest Entity PaymentstoAcquireDebtSecuritiesAvailableforsaleExcludingVariableInterestEntity	33107404000	USD
CY2020	nly	Proceedsfrom Saleof Debt Securities Availableforsale Excluding Variable Interest Entity ProceedsfromSaleofDebtSecuritiesAvailableforsaleExcludingVariableInterestEntity	52571156000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	19536638000	USD
CY2020	nly	Accretion Amortization Of Debt Securities Available For Sale AccretionAmortizationOfDebtSecuritiesAvailableForSale	-1373838000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1193044000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	75652396000	USD
CY2020Q4	us-gaap	Investment Owned Balance Principal Amount InvestmentOwnedBalancePrincipalAmount	72253465000	USD
CY2020Q4	nly	Debt Securities Availableforsale Remaining Premium DebtSecuritiesAvailableforsaleRemainingPremium	3971492000	USD
CY2020Q4	nly	Debt Securities Availableforsale Remaining Discount DebtSecuritiesAvailableforsaleRemainingDiscount	95734000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	72487080000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	3332263000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	166947000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	75652396000	USD
CY2019Q4	us-gaap	Investment Owned Balance Principal Amount InvestmentOwnedBalancePrincipalAmount	113123301000	USD
CY2019Q4	nly	Debt Securities Availableforsale Remaining Premium DebtSecuritiesAvailableforsaleRemainingPremium	5353597000	USD
CY2019Q4	nly	Debt Securities Availableforsale Remaining Discount DebtSecuritiesAvailableforsaleRemainingDiscount	166320000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	112863385000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2261636000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	291441000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	114833580000	USD
CY2020	nly	Mortgage Backed Securities Sold Carrying Value MortgageBackedSecuritiesSoldCarryingValue	51800000000	USD
	nly	Mortgage Backed Securities Sold Carrying Value MortgageBackedSecuritiesSoldCarryingValue	25500000000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	942450000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	305449000	USD
CY2020	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	637001000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	172518000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	210317000	USD
CY2019	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	-37799000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Allowance for Losses</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> – The Company evaluates the need for a loss reserve on each of its loans classified as held-for-investment where the fair value option is not elected. Allowance for loan losses are written off in the period the loans are deemed uncollectible.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Given the unique nature of each underlying borrower and any collateral, the Company assesses an allowance for each individual loan held-for-investment. A provision is established at origination or acquisition that reflects management’s estimate of the total expected credit loss over the expected life of the loan. In estimating the lifetime expected credit losses, management utilizes a probability of default and loss given default methodology (“Loss Given Default methodology”), which considers projected economic conditions over the reasonable and supportable forecast period. The forecast incorporates primarily market-based assumptions including, but not limited to, forward interest rate curves, unemployment rate estimates and certain indexes sourced from third party vendors. For any remaining period of the expected life of the loan after the reasonable and supportable period, the Company reverts to historical losses on a straight-line basis. Management uses third-party vendors’ loan pool data for loans with similar risk characteristics to estimate historical losses given the limited loss history of the Company’s loan portfolio. Changes in the lifetime expected credit loss are reflected in Loan loss provision in the Consolidated Statements of Comprehensive Income (Loss).</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For loans experiencing credit deterioration, the Company may use a different methodology to determine the expected credit losses such as a discounted cash flow analysis. For collateral-dependent loans, if foreclosure is probable, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for any selling costs, if applicable. Additionally, the Company may elect the practical expedient for a financial asset for which the repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty by measuring the allowance as the difference between the fair value of the collateral, less costs to sell, if applicable, and the amortized cost basis of the financial asset at the reporting date. The Company’s commercial loans are collateralized by commercial real estate including, but not limited to, multifamily real estate, office and retail space, hotels and industrial space. At origination, the fair value of the collateral generally exceeds the principal loan balance.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Management assesses the credit quality of the portfolio and adequacy of loan loss reserves on a quarterly basis, or more frequently as necessary. Significant judgment is required in this analysis. Depending on the expected recovery of its investment, the Company considers the estimated net recoverable value of the loans as well as other factors, including but not limited to the fair value of any collateral, the amount and the status of any senior debt, the prospects for the borrower and the competitive landscape where the borrower conducts business. To determine if loan loss allowances are required on investments in corporate debt, the Company reviews the monthly and/or quarterly financial statements of the borrowers, verifies loan compliance packages, if applicable, and analyzes current results relative to budgets and sensitivities performed at inception of the investment. Because these determinations are based upon projections of future economic events, which are inherently subjective, the amounts ultimately realized may differ materially from the carrying value as of the reporting date.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company may be exposed to various levels of credit risk depending on the nature of its investments and credit enhancements, if any, supporting its assets. The Company’s core investment process includes procedures related to the initial approval and periodic monitoring of credit risk and other risks associated with each investment. The Company’s investment underwriting procedures include evaluation of the underlying borrowers’ ability to manage and operate their respective properties or companies. Management reviews loan-to-value metrics at origination or acquisition of a new investment and if events occur that trigger re-evaluation by management.</span></div>
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	147600000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	16600000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3500000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	169500000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20100000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4462350000	USD
CY2020	us-gaap	Mortgage Loans On Real Estate New Mortgage Loans MortgageLoansOnRealEstateNewMortgageLoans	2447803000	USD
CY2020	us-gaap	Mortgage Loans On Real Estate Cost Of Mortgages Sold MortgageLoansOnRealEstateCostOfMortgagesSold	2891854000	USD
CY2020	srt	Mortgage Loans On Real Estate Collections Of Principal MortgageLoansOnRealEstateCollectionsOfPrincipal	809045000	USD
CY2020	nly	Mortgage Loanson Real Estate Gains Losses MortgageLoansonRealEstateGainsLosses	-101248000	USD
CY2020	nly	Sec Schedule1229 Real Estate Companies Investment In Mortgage Loans On Real Estate Amortization Accretion Of Premium SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateAmortizationAccretionOfPremium	-9067000	USD
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	3083821000	USD
CY2020Q4	nly	Noncash Or Part Noncash Financial Instruments Owned And Pledged As Collateral NoncashOrPartNoncashFinancialInstrumentsOwnedAndPledgedAsCollateral	1900000000	USD
CY2020	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	0.94
CY2019	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	0.92
CY2020Q4	nly	Held To Maturity Securities Corporate Debt HeldToMaturitySecuritiesCorporateDebt	2239930000	USD
CY2019Q4	nly	Held To Maturity Securities Corporate Debt HeldToMaturitySecuritiesCorporateDebt	2144850000	USD
CY2020Q4	nly	Held To Maturity Securities Corporate Debt HeldToMaturitySecuritiesCorporateDebt	2239930000	USD
CY2019Q4	nly	Held To Maturity Securities Corporate Debt HeldToMaturitySecuritiesCorporateDebt	2144850000	USD
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	378078000	USD
CY2018Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	557813000	USD
CY2020	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	72160000	USD
CY2019	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	0	USD
CY2020	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-107517000	USD
CY2019	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-102016000	USD
CY2020	us-gaap	Servicing Asset At Fair Value Other Changes That Affect Balance ServicingAssetAtFairValueOtherChangesThatAffectBalance	-97506000	USD
CY2019	us-gaap	Servicing Asset At Fair Value Other Changes That Affect Balance ServicingAssetAtFairValueOtherChangesThatAffectBalance	-77719000	USD
CY2020Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	100895000	USD
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	378078000	USD
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	0	USD
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	0	USD
CY2020	nly	Number Of Real Estate Properties Acquired Foreclosure NumberOfRealEstatePropertiesAcquiredForeclosure	2	realEstateProperty
CY2020Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	79800000	USD
CY2019	nly	Number Of Real Estate Properties Purchased NumberOfRealEstatePropertiesPurchased	0	realEstateProperty
CY2020	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	124500000	USD
CY2020	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	19700000	USD
CY2019	nly	Number Of Real Estate Properties Sold NumberOfRealEstatePropertiesSold	2	realEstateProperty
CY2019	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	25200000	USD
CY2019	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	7500000	USD
CY2020	nly	Weighted Average Amortization Period WeightedAverageAmortizationPeriod	P5Y6M
CY2020Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	663912000	USD
CY2019Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	704354000	USD
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	100147000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	87532000	USD
CY2020Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	563765000	USD
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	616822000	USD
CY2020Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	92549000	USD
CY2019Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	108816000	USD
CY2020Q4	us-gaap	Real Estate Investments RealEstateInvestments	656314000	USD
CY2019Q4	us-gaap	Real Estate Investments RealEstateInvestments	725638000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	44267000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	39981000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	36161000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	30645000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	24362000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	60971000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	236387000	USD
CY2020Q4	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	0	USD
CY2019Q4	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	1199000	USD
CY2020Q4	us-gaap	Derivative Assets DerivativeAssets	171134000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	113556000	USD
CY2020Q4	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	1006492000	USD
CY2020Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1033345000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	803866000	USD
CY2019Q4	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	706862000	USD
CY2020Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	900000000	USD
CY2020	nly	Gain Loss On Realized Interest Rate Swaps GainLossOnRealizedInterestRateSwaps	-207877000	USD
CY2020	nly	Gain Loss On Termination Of Interest Rate Swaps GainLossOnTerminationOfInterestRateSwaps	-1917628000	USD
CY2020	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-904532000	USD
CY2019	nly	Gain Loss On Realized Interest Rate Swaps GainLossOnRealizedInterestRateSwaps	351375000	USD
CY2019	nly	Gain Loss On Termination Of Interest Rate Swaps GainLossOnTerminationOfInterestRateSwaps	-1442964000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-1210276000	USD
CY2018	nly	Gain Loss On Realized Interest Rate Swaps GainLossOnRealizedInterestRateSwaps	100553000	USD
CY2018	nly	Gain Loss On Termination Of Interest Rate Swaps GainLossOnTerminationOfInterestRateSwaps	1409000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	424081000	USD
CY2020	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	756305000	USD
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-680770000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10471000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	71800000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	71800000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	20957000	USD
CY2020	nly	Intangible Assets Acquired IntangibleAssetsAcquired	50360000	USD
CY2020	nly	Intangible Assets Divested IntangibleAssetsDivested	5320000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	55526000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	64800000000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	101700000000	USD
CY2020Q4	nly	Repurchase Agreements Weighted Average Borrowing Rates RepurchaseAgreementsWeightedAverageBorrowingRates	0.0082
CY2019Q4	nly	Repurchase Agreements Weighted Average Borrowing Rates RepurchaseAgreementsWeightedAverageBorrowingRates	0.0199
CY2020	us-gaap	Repurchase Agreement Counterparty Weighted Average Maturity Of Agreements1 RepurchaseAgreementCounterpartyWeightedAverageMaturityOfAgreements1	P64D
CY2019	us-gaap	Repurchase Agreement Counterparty Weighted Average Maturity Of Agreements1 RepurchaseAgreementCounterpartyWeightedAverageMaturityOfAgreements1	P65D
CY2020Q4	nly	Securities Soldunder Agreementsto Repurchase Maximum Available Under Counterparty Arrangements SecuritiesSoldunderAgreementstoRepurchaseMaximumAvailableUnderCounterpartyArrangements	2400000000	USD
CY2020Q4	nly	Securities Soldunder Agreementsto Repurchase Commitments Available SecuritiesSoldunderAgreementstoRepurchaseCommitmentsAvailable	1900000000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	64825239000	USD
CY2020Q4	nly	Repurchase Agreements Weighted Average Rates RepurchaseAgreementsWeightedAverageRates	0.0032
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	101740728000	USD
CY2019Q4	nly	Repurchase Agreements Weighted Average Rates RepurchaseAgreementsWeightedAverageRates	0.0203
CY2020	nly	Percent Of Total Repurchase Agreements With Remaining Maturity Over1 Year PercentOfTotalRepurchaseAgreementsWithRemainingMaturityOver1Year	0.01
CY2019	nly	Percent Of Total Repurchase Agreements With Remaining Maturity Over1 Year PercentOfTotalRepurchaseAgreementsWithRemainingMaturityOver1Year	0
CY2020	us-gaap	Schedule Of Repurchase Agreements ScheduleOfRepurchaseAgreements	<div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table summarizes the gross amounts of reverse repurchase agreements and repurchase agreements, amounts offset in accordance with netting arrangements and net amounts of repurchase agreements and reverse repurchase agreements as presented in the Consolidated Statements of Financial Condition at December 31, 2020 and 2019. Refer to the “Derivative Instruments” Note for information related to the effect of netting arrangements on the Company’s derivative instruments.</span></div><div style="margin-bottom:17pt;margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:89.473%"><tr><td style="width:1.0%"/><td style="width:25.860%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.547%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.616%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.547%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.616%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.547%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.616%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.551%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="background-color:#00316c;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"> </span></td><td colspan="9" style="background-color:#00316c;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">December 31, 2020</span></td><td colspan="3" style="background-color:#00316c;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="9" style="background-color:#00316c;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">December 31, 2019</span></td></tr><tr><td colspan="3" style="background-color:#00316c;border-left:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"> </span></td><td colspan="3" style="background-color:#00316c;border-top:1pt solid #ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Reverse Repurchase Agreements</span></td><td colspan="3" style="background-color:#00316c;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#00316c;border-top:1pt solid #ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Repurchase Agreements</span></td><td colspan="3" style="background-color:#00316c;padding:0 1pt"/><td colspan="3" style="background-color:#00316c;border-top:1pt solid #ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Reverse Repurchase Agreements</span></td><td colspan="3" style="background-color:#00316c;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#00316c;border-right:1pt solid #000000;border-top:1pt solid #ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Repurchase Agreements</span></td></tr><tr><td colspan="3" style="background-color:#7d91a6;border-left:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"> </span></td><td colspan="21" style="background-color:#7d91a6;border-right:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(dollars in thousands)</span></td></tr><tr><td colspan="3" style="border-left:1pt solid #000000;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Gross amounts</span></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">250,000</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">65,075,239</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">100,000 </span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">101,840,728 </span></td><td style="border-right:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#e5e5e5;border-left:1pt solid #000000;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Amounts offset</span></td><td colspan="2" style="background-color:#e5e5e5;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(250,000)</span></td><td style="background-color:#e5e5e5;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#e5e5e5;padding:0 1pt"/><td colspan="2" style="background-color:#e5e5e5;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(250,000)</span></td><td style="background-color:#e5e5e5;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#e5e5e5;padding:0 1pt"/><td colspan="2" style="background-color:#e5e5e5;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">(100,000)</span></td><td style="background-color:#e5e5e5;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#e5e5e5;padding:0 1pt"/><td colspan="2" style="background-color:#e5e5e5;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">(100,000)</span></td><td style="background-color:#e5e5e5;border-right:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Netted amounts</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">—</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">64,825,239</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">101,740,728 </span></td><td style="background-color:#ffffff;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr style="height:3pt"><td colspan="3" style="border-bottom:1pt solid #000000;border-left:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;border-top:3pt double #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;border-top:3pt double #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;border-top:3pt double #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;border-right:1pt solid #000000;border-top:3pt double #000000;padding:0 1pt"/></tr></table></div>
CY2020Q4	nly	Securities For Reverse Repurchase Agreements Gross Amounts SecuritiesForReverseRepurchaseAgreementsGrossAmounts	250000000	USD
CY2020Q4	nly	Securities Sold Under Agreements To Repurchase Gross Amounts SecuritiesSoldUnderAgreementsToRepurchaseGrossAmounts	65075239000	USD
CY2019Q4	nly	Securities For Reverse Repurchase Agreements Gross Amounts SecuritiesForReverseRepurchaseAgreementsGrossAmounts	100000000	USD
CY2019Q4	nly	Securities Sold Under Agreements To Repurchase Gross Amounts SecuritiesSoldUnderAgreementsToRepurchaseGrossAmounts	101840728000	USD
CY2020Q4	nly	Securities For Reverse Repurchase Agreements Amounts Offset SecuritiesForReverseRepurchaseAgreementsAmountsOffset	250000000	USD
CY2020Q4	nly	Securities Sold Under Agreements To Repurchase Amounts Offset SecuritiesSoldUnderAgreementsToRepurchaseAmountsOffset	250000000	USD
CY2019Q4	nly	Securities For Reverse Repurchase Agreements Amounts Offset SecuritiesForReverseRepurchaseAgreementsAmountsOffset	100000000	USD
CY2019Q4	nly	Securities Sold Under Agreements To Repurchase Amounts Offset SecuritiesSoldUnderAgreementsToRepurchaseAmountsOffset	100000000	USD
CY2020Q4	us-gaap	Securities For Reverse Repurchase Agreements SecuritiesForReverseRepurchaseAgreements	0	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	64825239000	USD
CY2019Q4	us-gaap	Securities For Reverse Repurchase Agreements SecuritiesForReverseRepurchaseAgreements	0	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	101740728000	USD
CY2020Q4	nly	Collateral Held On Repurchase Agreements After Effect Of Interest Rate Swaps Fair Value CollateralHeldOnRepurchaseAgreementsAfterEffectOfInterestRateSwapsFairValue	70600000000	USD
CY2020Q4	nly	Repurchase Agreements Accrued Interest RepurchaseAgreementsAccruedInterest	200000000	USD
CY2019Q4	nly	Collateral Held On Repurchase Agreements After Effect Of Interest Rate Swaps Fair Value CollateralHeldOnRepurchaseAgreementsAfterEffectOfInterestRateSwapsFairValue	112800000000	USD
CY2019Q4	nly	Repurchase Agreements Accrued Interest RepurchaseAgreementsAccruedInterest	357900000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	11123000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	17890000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	26626000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	105635000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	186929000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	81447000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	429650000	USD
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2914850000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2914850000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	1398240618	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	1398240618	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	1430106199	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	1430106199	shares
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	11300000	shares
CY2019Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	1500000000	USD
CY2020Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	1500000000	USD
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	32400000	shares
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	208900000	USD
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	26200000	shares
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	223200000	USD
CY2020	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	166000	shares
CY2019	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	180000	shares
CY2020	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	1175000	USD
CY2019	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	1795000	USD
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	85150000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	85150000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	63500000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	63500000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	81900000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	81900000	shares
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	1536569000	USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	1982026000	USD
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Preferred Stock Redemption Price Per Share PreferredStockRedemptionPricePerShare	25.00
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1285124000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1516323000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.91
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.05
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	307613000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	357527000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.22
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.25
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	0	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	0
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	1790759	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	7.24
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	100100	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	9.99
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	19921	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	9.59
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	1670738	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	7.05
CY2020	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	3700000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	9000000.0	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1	P2Y2M26D
CY2020	nly	Interest Income Securities Mortgage Backed And Agency Debentures InterestIncomeSecuritiesMortgageBackedAndAgencyDebentures	1718960000	USD
CY2019	nly	Interest Income Securities Mortgage Backed And Agency Debentures InterestIncomeSecuritiesMortgageBackedAndAgencyDebentures	3195546000	USD
CY2018	nly	Interest Income Securities Mortgage Backed And Agency Debentures InterestIncomeSecuritiesMortgageBackedAndAgencyDebentures	2830521000	USD
CY2020	nly	Interest Income Residential Mortgage Loans InterestIncomeResidentialMortgageLoans	170259000	USD
CY2019	nly	Interest Income Residential Mortgage Loans InterestIncomeResidentialMortgageLoans	150066000	USD
CY2018	nly	Interest Income Residential Mortgage Loans InterestIncomeResidentialMortgageLoans	83260000	USD
CY2020	nly	Interest Income Commercial Real Estate Debt And Preferred Equity InterestIncomeCommercialRealEstateDebtAndPreferredEquity	338763000	USD
CY2019	nly	Interest Income Commercial Real Estate Debt And Preferred Equity InterestIncomeCommercialRealEstateDebtAndPreferredEquity	378395000	USD
CY2018	nly	Interest Income Commercial Real Estate Debt And Preferred Equity InterestIncomeCommercialRealEstateDebtAndPreferredEquity	356981000	USD
CY2020	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	0	USD
CY2019	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	0	USD
CY2018	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	160000	USD
CY2020	us-gaap	Interest Income Securities Purchased Under Agreements To Resell InterestIncomeSecuritiesPurchasedUnderAgreementsToResell	1643000	USD
CY2019	us-gaap	Interest Income Securities Purchased Under Agreements To Resell InterestIncomeSecuritiesPurchasedUnderAgreementsToResell	63290000	USD
CY2018	us-gaap	Interest Income Securities Purchased Under Agreements To Resell InterestIncomeSecuritiesPurchasedUnderAgreementsToResell	61641000	USD
CY2020	us-gaap	Interest Income Operating InterestIncomeOperating	2229625000	USD
CY2019	us-gaap	Interest Income Operating InterestIncomeOperating	3787297000	USD
CY2018	us-gaap	Interest Income Operating InterestIncomeOperating	3332563000	USD
CY2020	nly	Interest Paid On Repurchase Agreements InterestPaidOnRepurchaseAgreements	705218000	USD
CY2019	nly	Interest Paid On Repurchase Agreements InterestPaidOnRepurchaseAgreements	2513282000	USD
CY2020	nly	Interest Expense Securitized Debt Of Consolidated Vie InterestExpenseSecuritizedDebtOfConsolidatedVie	142602000	USD
CY2018	nly	Interest Paid On Repurchase Agreements InterestPaidOnRepurchaseAgreements	1698930000	USD
CY2019	nly	Interest Expense Securitized Debt Of Consolidated Vie InterestExpenseSecuritizedDebtOfConsolidatedVie	141981000	USD
CY2018	nly	Interest Expense Securitized Debt Of Consolidated Vie InterestExpenseSecuritizedDebtOfConsolidatedVie	98013000	USD
CY2020	nly	Interest Expense Participation Sold InterestExpenseParticipationSold	78000	USD
CY2019	nly	Interest Expense Participation Sold InterestExpenseParticipationSold	0	USD
CY2018	nly	Interest Expense Participation Sold InterestExpenseParticipationSold	0	USD
CY2020	us-gaap	Interest Expense Other InterestExpenseOther	51214000	USD
CY2019	us-gaap	Interest Expense Other InterestExpenseOther	129612000	USD
CY2018	us-gaap	Interest Expense Other InterestExpenseOther	100917000	USD
CY2020	us-gaap	Interest Expense InterestExpense	899112000	USD
CY2019	us-gaap	Interest Expense InterestExpense	2784875000	USD
CY2018	us-gaap	Interest Expense InterestExpense	1897860000	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1330513000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1002422000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1434703000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	-889772000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-2163091000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	54148000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1391000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-226000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-260000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-891163000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-2162865000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	54408000	USD
CY2020	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	142036000	USD
CY2019	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	136576000	USD
CY2018	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	129312000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-1033199000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2299441000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-74904000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1414659439	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1434912682	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1209601809	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1414659439	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1434912682	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1209601809	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.73
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.60
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.06
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.73
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.60
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.06
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1000000.0	shares
CY2020	nly	Percentage Of Taxable Income Required To Be Distributed While Operating As Reit PercentageOfTaxableIncomeRequiredToBeDistributedWhileOperatingAsReit	1
CY2020Q1	us-gaap	Temporary Equity Redemption Price Per Share TemporaryEquityRedemptionPricePerShare	1.00
CY2020Q1	nly	Stockholders Equity Amount Used In Determining Monthly Management Fee StockholdersEquityAmountUsedInDeterminingMonthlyManagementFee	17280000000	USD
CY2020Q1	nly	Monthly Management Fee Percentage Of Stockholders Equity Over A Predetermined Amount Used In Calculating Total Management Fee MonthlyManagementFeePercentageOfStockholdersEquityOverAPredeterminedAmountUsedInCalculatingTotalManagementFee	0.0075
CY2020Q1	nly	Stockholders Equity Amount Used In Determining Monthly Management Fee StockholdersEquityAmountUsedInDeterminingMonthlyManagementFee	17280000000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	77900000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	170600000	USD
CY2020	nly	Operating Lease Remaining Lease Term OperatingLeaseRemainingLeaseTerm	P5Y
CY2020Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	3200000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	13167000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	17184000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y8M12D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.029
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	3799000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3918000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3862000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3862000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3862000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2895000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	18399000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1215000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	17184000	USD
CY2019Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	0	USD
CY2019	nly	Real Estate Acquisitions And Improvements RealEstateAcquisitionsAndImprovements	5811000	USD
CY2020Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	0	USD
CY2020	srt	Sec Schedule Iii Real Estate Number Of Units SECScheduleIIIRealEstateNumberOfUnits	48	realEstateProperty
CY2020Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	429652000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	173280000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	600851000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements	-110219000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	164240000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	499672000	USD
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	663912000	USD
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	100147000	USD
CY2019Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	704354000	USD
CY2018Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	721664000	USD
CY2017Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	441971000	USD
CY2020	nly	Real Estate Acquisitions And Improvements RealEstateAcquisitionsAndImprovements	83979000	USD
CY2018	nly	Real Estate Acquisitions And Improvements RealEstateAcquisitionsAndImprovements	279693000	USD
CY2020	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	124421000	USD
CY2019	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	23121000	USD
CY2018	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	0	USD
CY2020Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	663912000	USD
CY2019Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	704354000	USD
CY2018Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	721664000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	87532000	USD
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	67026000	USD
CY2017Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	48920000	USD
CY2020	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	10098000	USD
CY2019	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	3166000	USD
CY2018	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	0	USD
CY2020	us-gaap	Real Estate Accumulated Depreciation Period Increase Decrease RealEstateAccumulatedDepreciationPeriodIncreaseDecrease	22713000	USD
CY2019	us-gaap	Real Estate Accumulated Depreciation Period Increase Decrease RealEstateAccumulatedDepreciationPeriodIncreaseDecrease	23672000	USD
CY2018	us-gaap	Real Estate Accumulated Depreciation Period Increase Decrease RealEstateAccumulatedDepreciationPeriodIncreaseDecrease	18106000	USD
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	100147000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	87532000	USD
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	67026000	USD
CY2020Q4	srt	Mortgage Loans On Real Estate Face Amount Of Mortgages MortgageLoansOnRealEstateFaceAmountOfMortgages	568385000	USD
CY2020Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	498081000	USD

Files In Submission

Name	View Source	Status
0001628280-21-002510-index-headers.html	Edgar Link	pending
0001628280-21-002510-index.html	Edgar Link	pending
0001628280-21-002510.txt	Edgar Link	pending
0001628280-21-002510-xbrl.zip	Edgar Link	pending
a202010-knlyexhibit211.htm	Edgar Link	pending
a202010-knlyexhibit231.htm	Edgar Link	pending
a202010-knlyexhibit311.htm	Edgar Link	pending
a202010-knlyexhibit312.htm	Edgar Link	pending
a202010-knlyexhibit321.htm	Edgar Link	pending
a202010-knlyexhibit322.htm	Edgar Link	pending
a202010-knlyexhibit412.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
image_01.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
nly-20201231.htm	Edgar Link	pending
nly-20201231.xsd	Edgar Link	pending
nly-20201231_cal.xml	Edgar Link	unprocessable
nly-20201231_def.xml	Edgar Link	unprocessable
nly-20201231_g1.jpg	Edgar Link	pending
nly-20201231_g2.jpg	Edgar Link	pending
nly-20201231_g3.jpg	Edgar Link	pending
nly-20201231_htm.xml	Edgar Link	completed
nly-20201231_lab.xml	Edgar Link	unprocessable
nly-20201231_pre.xml	Edgar Link	unprocessable
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
R101.htm	Edgar Link	pending
R102.htm	Edgar Link	pending
R103.htm	Edgar Link	pending
R104.htm	Edgar Link	pending
R105.htm	Edgar Link	pending
R106.htm	Edgar Link	pending
R107.htm	Edgar Link	pending
R108.htm	Edgar Link	pending
R109.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R110.htm	Edgar Link	pending
R111.htm	Edgar Link	pending
R112.htm	Edgar Link	pending
R113.htm	Edgar Link	pending
R114.htm	Edgar Link	pending
R115.htm	Edgar Link	pending
R116.htm	Edgar Link	pending
R117.htm	Edgar Link	pending
R118.htm	Edgar Link	pending
R119.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R120.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$NLY
ANNALY CAPITAL MANAGEMENT INC Stock $nly

2019 Q4 Form 10-K Financial Statement

#000162828021002510 Filed on February 19, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NLY ANNALY CAPITAL MANAGEMENT INC Stock $nly

2019 Q4 Form 10-K Financial Statement

#000162828021002510 Filed on February 19, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NLY
ANNALY CAPITAL MANAGEMENT INC Stock $nly