$NLY
ANNALY CAPITAL MANAGEMENT INC Stock $nly

$nly Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000162828020001548 Filed on February 14, 2020

Income Statement

Concept	2019 Q4	2019 Q3	2019 Q2
Revenue	$1.910B	$82.50M	-$953.7M
YoY Change	-220.38%	-91.8%	-186.26%
Cost Of Revenue	$620.1M	$766.9M	$750.2M
YoY Change	5.67%	53.07%	69.46%
Gross Profit	$1.290B	-$684.4M	-$1.704B
YoY Change	-159.35%	-235.61%	-357.04%
Gross Profit Margin	67.54%	-829.58%
Selling, General & Admin	$73.40M	$66.10M	$78.40M
YoY Change	-4.8%	-47.75%	22.88%
% of Gross Profit	5.69%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.000M	$7.000M	$10.00M
YoY Change	0.0%	-86.27%	42.86%
% of Gross Profit	0.62%
Operating Expenses	$80.70M	$69.60M	$78.40M
YoY Change	0.25%	-44.98%	22.88%
Operating Profit	$1.209B	-$754.0M	-$1.782B
YoY Change	-153.65%	-299.37%	-397.5%
Interest Expense	$620.1M	$766.9M	$750.2M
YoY Change	5.67%	53.08%	69.47%
% of Operating Profit	51.28%
Other Income/Expense, Net	$42.66M	$35.07M	$28.18M
YoY Change	-18.56%	-429.55%	-17.53%
Pretax Income	$1.209B	-$754.1M	-$1.782B
YoY Change	-153.65%	-299.39%	-397.48%
Income Tax	-$594.0K	-$6.907M	-$5.915M
% Of Pretax Income	-0.05%
Net Earnings	$1.210B	-$747.1M	-$1.776B
YoY Change	-153.65%	-293.75%	-398.08%
Net Earnings / Revenue	63.34%	-905.53%
Basic Earnings Per Share	$0.82	-$0.54	-$1.24
Diluted Earnings Per Share	$0.82	-$0.54	-$1.24
COMMON SHARES
Basic Shares Outstanding	1.430B shares	1.453B shares	1.456B shares
Diluted Shares Outstanding		1.453B shares	1.456B shares

Balance Sheet

Concept	2019 Q4	2019 Q3	2019 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.851B	$1.794B	$1.982B
YoY Change	6.62%	65.65%	74.63%
Cash & Equivalents	$1.851B	$1.794B	$1.982B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$5.000M	$193.0M	$5.000M
Other Receivables	$450.0M	$484.0M	$441.0M
Total Short-Term Assets	$2.306B	$2.471B	$2.428B
YoY Change	6.66%	-8.38%	64.05%
LONG-TERM ASSETS
Property, Plant & Equipment	$741.0M	$742.0M	$750.0M
YoY Change	0.27%	-1.46%	56.9%
Goodwill	$71.80M	$71.80M	$71.80M
YoY Change	0.0%	0.0%	0.0%
Intangibles	$20.96M	$23.09M	$24.78M
YoY Change	-27.83%	-26.06%	29.08%
Long-Term Investments	$126.7B	$125.1B	$128.1B
YoY Change	23.89%	23.06%	35.73%
Other Assets
YoY Change
Total Long-Term Assets	$128.0B	$126.5B	$129.4B
YoY Change	23.51%	22.49%	32.89%
TOTAL ASSETS
Total Short-Term Assets	$2.306B	$2.471B	$2.428B
Total Long-Term Assets	$128.0B	$126.5B	$129.4B
Total Assets	$130.3B	$129.0B	$131.8B
YoY Change	23.17%	21.7%	33.36%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$497.0M	$587.0M	$713.0M
YoY Change	-12.96%	46.75%	49.16%
Deferred Revenue
YoY Change
Short-Term Debt	$101.7B	$102.6B	$105.1B
YoY Change	26.26%	30.38%	38.72%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$103.1B	$103.8B	$106.8B
YoY Change	25.48%	27.04%	37.45%
LONG-TERM LIABILITIES
Long-Term Debt	$10.56B	$8.895B	$8.185B
YoY Change	23.18%	1.07%	20.39%
Other Long-Term Liabilities	$877.0M	$1.050B	$1.117B
YoY Change	-9.02%	107.92%	98.4%
Total Long-Term Liabilities	$11.44B	$9.945B	$9.302B
YoY Change	19.93%	6.87%	26.35%
TOTAL LIABILITIES
Total Short-Term Liabilities	$103.1B	$103.8B	$106.8B
Total Long-Term Liabilities	$11.44B	$9.945B	$9.302B
Total Liabilities	$114.5B	$113.7B	$116.1B
YoY Change	24.9%	24.97%	36.49%
SHAREHOLDERS EQUITY
Retained Earnings	-$8.309B	-$9.126B	-$7.983B
YoY Change	84.91%	403.65%	343.39%
Common Stock	$14.30M	$14.38M	$14.56M
YoY Change	8.85%	10.35%	25.07%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$15.79B	$15.22B	$15.70B
YoY Change
Total Liabilities & Shareholders Equity	$130.3B	$129.0B	$131.8B
YoY Change	23.17%	21.7%	33.36%

Cashflow Statement

Concept	2019 Q4	2019 Q3	2019 Q2
OPERATING ACTIVITIES
Net Income	$1.210B	-$747.1M	-$1.776B
YoY Change	-153.65%	-293.75%	-398.08%
Depreciation, Depletion And Amortization	$8.000M	$7.000M	$10.00M
YoY Change	0.0%	-86.27%	42.86%
Cash From Operating Activities	$1.195B	-$709.0M	-$744.0M
YoY Change	-398.0%	-196.73%	-177.74%
INVESTING ACTIVITIES
Capital Expenditures	-$681.0M	-$180.0M	-$169.0M
YoY Change	477.12%	-69.85%	-36.7%
Acquisitions
YoY Change
Other Investing Activities	-$196.0M	$3.431B	-$14.94B
YoY Change	-47.17%	-483.35%	-753.67%
Cash From Investing Activities	-$876.0M	$3.250B	-$15.11B
YoY Change	79.14%	-317.68%	-848.12%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-263.0M	-2.730B	16.32B
YoY Change	-117.03%	-486.14%	-677.35%
NET CHANGE
Cash From Operating Activities	1.195B	-709.0M	-744.0M
Cash From Investing Activities	-876.0M	3.250B	-15.11B
Cash From Financing Activities	-263.0M	-2.730B	16.32B
Net Change In Cash	56.00M	-189.0M	460.0M
YoY Change	-91.44%	256.6%	204.64%
FREE CASH FLOW
Cash From Operating Activities	$1.195B	-$709.0M	-$744.0M
Capital Expenditures	-$681.0M	-$180.0M	-$169.0M
Free Cash Flow	$1.876B	-$529.0M	-$575.0M
YoY Change	-762.9%	-139.77%	-146.98%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	nly	Ratio Of Independent Directors Or Holders Of A Majority Of The Outstanding Shares RatioOfIndependentDirectorsOrHoldersOfAMajorityOfTheOutstandingShares	0.0067
CY2018Q4	us-gaap	Cash Collateral For Borrowed Securities CashCollateralForBorrowedSecurities	1581775000	USD
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0001043219
CY2019Q1	nly	Monthly Management Fee Percentage Of Stockholders Equity Up To A Predetermined Amount Used In Calculating Total Management Fee MonthlyManagementFeePercentageOfStockholdersEquityUpToAPredeterminedAmountUsedInCalculatingTotalManagementFee	0.0875
CY2019Q4	us-gaap	Cash Collateral For Borrowed Securities CashCollateralForBorrowedSecurities	1648545000	USD
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	1313763450	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	1430106199	shares
CY2018Q4	us-gaap	Goodwill Goodwill	71800000	USD
CY2018Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	0	USD
CY2018Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	2997051000	USD
CY2019Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	3240583000	USD
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	73400000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	81900000	shares
CY2018Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	0	USD
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	11300000.0	shares
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	11300000.0	shares
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	1211 Avenue of the Americas
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	New York,
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10036
CY2019	dei	City Area Code CityAreaCode	212
CY2019	dei	Local Phone Number LocalPhoneNumber	696-0100
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019Q4	nly	Receivable For Investment Securities Sold ReceivableForInvestmentSecuritiesSold	4792000	USD
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q4	nly	Receivable For Investment Securities Sold ReceivableForInvestmentSecuritiesSold	68779000	USD
CY2019Q4	nly	Financing And Accrued Investment Income Receivable FinancingAndAccruedInvestmentIncomeReceivable	449906000	USD
CY2019	dei	Entity File Number EntityFileNumber	1-13447
CY2019	dei	Entity Registrant Name EntityRegistrantName	ANNALY CAPITAL MANAGEMENT INC
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	22-3479661
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	13300000000	USD
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	1430324298	shares
CY2017	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	0	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1850729000	USD
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CY2019Q4	us-gaap	Financial Instruments Owned Mortgages Mortgage Backed And Asset Backed Securities At Fair Value FinancialInstrumentsOwnedMortgagesMortgageBackedAndAssetBackedSecuritiesAtFairValue	114833580000	USD
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CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4462350000	USD
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4585975000	USD
CY2019Q4	us-gaap	Servicing Asset ServicingAsset	378078000	USD
CY2018Q4	us-gaap	Servicing Asset ServicingAsset	557813000	USD
CY2019Q4	us-gaap	Financial Instruments Owned And Pledged As Collateral At Fair Value FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue	7002460000	USD
CY2018Q4	us-gaap	Financial Instruments Owned And Pledged As Collateral At Fair Value FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue	3833200000	USD
CY2019Q4	us-gaap	Real Estate Investments RealEstateInvestments	725638000	USD
CY2018Q4	us-gaap	Real Estate Investments RealEstateInvestments	739473000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	113556000	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	200503000	USD
CY2019Q4	us-gaap	Securities For Reverse Repurchase Agreements SecuritiesForReverseRepurchaseAgreements	0	USD
CY2018Q4	us-gaap	Securities For Reverse Repurchase Agreements SecuritiesForReverseRepurchaseAgreements	650040000	USD
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CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	1778168000	USD
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CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	92772000	USD
CY2018Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	100854000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	381220000	USD
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CY2019Q4	us-gaap	Assets Assets	130295081000	USD
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CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	101740728000	USD
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CY2019Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	476335000	USD
CY2018Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	570928000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	357527000	USD
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CY2019Q4	nly	Securitized Debt Of Consolidated Vie SecuritizedDebtOfConsolidatedVie	5622801000	USD
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CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	15792017000	USD
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CY2019Q4	us-gaap	Minority Interest MinorityInterest	4327000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	5689000	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
CY2019	us-gaap	Interest Income Operating InterestIncomeOperating	3787297000	USD
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CY2019	nly	Gain Loss On Realized Interest Rate Swaps GainLossOnRealizedInterestRateSwaps	351375000	USD
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CY2019	nly	Nonoperating Income Expense Pre Derivative Instruments NonoperatingIncomeExpensePreDerivativeInstruments	-709262000	USD
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CY2017	nly	Nonoperating Income Expense Pre Derivative Instruments NonoperatingIncomeExpensePreDerivativeInstruments	217816000	USD
CY2019	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-3011127000	USD
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CY2017	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	199493000	USD
CY2019	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	136413000	USD
CY2018	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	109927000	USD
CY2017	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	115857000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-226000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-10835000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2375000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6982000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-2163091000	USD
CY2018	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	129312000	USD
CY2017	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	59802000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	301634000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	329873000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	224124000	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
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1575998000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	54148000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1569016000	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
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-588000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-2162865000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	54408000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	1569604000	USD
CY2019	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	136576000	USD
CY2017	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	109635000	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
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1459969000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.60
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.06
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.37
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.60
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.06
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.37
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
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1065923652	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
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1066351616	shares
CY2019	us-gaap	Profit Loss ProfitLoss	-2163091000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	54148000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1569016000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-260000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-89997000	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
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
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-6893000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-588000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-2840000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-2864000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1955191000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-799437000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	14871573000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-2163091000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-49870000	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
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-40127000	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
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1528889000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1529477000	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
CY2017	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	109635000	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
CY2017	nly	Comprehensive Income Loss Attributable To Common Stock Holders ComprehensiveIncomeLossAttributableToCommonStockHolders	1419842000	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
CY2018	us-gaap	Profit Loss ProfitLoss	54148000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1569016000	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
CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-872346000	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
CY2017	nly	Amortization Of Securitized Debt Premiums And Discounts Net AmortizationOfSecuritizedDebtPremiumsAndDiscountsNet	3596000	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
CY2017	nly	Depreciation Depletion And Amortization Excluding Amortization Of Debt Premiums And Discounts Deferred Financing Costs And Discounts Of Investments DepreciationDepletionAndAmortizationExcludingAmortizationOfDebtPremiumsAndDiscountsDeferredFinancingCostsAndDiscountsOfInvestments	27956000	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
CY2017	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-3938000	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
CY2017	nly	Gain Loss On Investments Debt And Derivatives GainLossOnInvestmentsDebtAndDerivatives	734672000	USD
CY2017	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	89777000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	16569000	USD
CY2018	nly	Payments To Acquire Trading Securities PaymentsToAcquireTradingSecurities	0	USD
CY2017	nly	Payments To Acquire Trading Securities PaymentsToAcquireTradingSecurities	2104000	USD
CY2019	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	0	USD
CY2018	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	0	USD
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	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
CY2017	nly	Payments For Purchase Of Loans Operating Activities PaymentsForPurchaseOfLoansOperatingActivities	309473000	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
CY2017	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	410285000	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
CY2017	nly	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	-233915000	USD
CY2017	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	16000	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
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	58715000	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
CY2017	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	52202000	USD
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-94593000	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	295640000	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
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	48646000	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
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1632239000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	62794871000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	44624006000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	40287765000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	25513227000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	33256888000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	13402428000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	17156148000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	11365683000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	12016190000	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
CY2017	us-gaap	Payments To Acquire Mortgage Servicing Rights Msr PaymentsToAcquireMortgageServicingRightsMSR	11493000	USD
	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	258334000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	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
CY2017	us-gaap	Proceeds From Sale Of Mortgage Servicing Rights Msr ProceedsFromSaleOfMortgageServicingRightsMSR	33000	USD
CY2019	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	890042000	USD
CY2018	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	1241818000	USD
CY2017	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	693095000	USD
CY2019	us-gaap	Proceeds From Sale Of Held To Maturity Securities ProceedsFromSaleOfHeldToMaturitySecurities	265218000	USD
CY2018	us-gaap	Proceeds From Sale Of Held To Maturity Securities ProceedsFromSaleOfHeldToMaturitySecurities	0	USD
CY2017	us-gaap	Proceeds From Sale Of Held To Maturity Securities ProceedsFromSaleOfHeldToMaturitySecurities	0	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	368927000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	378865000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	462622000	USD
CY2019	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	1299047000	USD
CY2018	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	815252000	USD
CY2017	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	504952000	USD
CY2019	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	193846000	USD
CY2018	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	150059000	USD
CY2017	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	11960000	USD
CY2019	nly	Principal Payments Received On Commercial Real Estate Investments PrincipalPaymentsReceivedOnCommercialRealEstateInvestments	1968621000	USD
CY2018	nly	Principal Payments Received On Commercial Real Estate Investments PrincipalPaymentsReceivedOnCommercialRealEstateInvestments	1504032000	USD
CY2017	nly	Principal Payments Received On Commercial Real Estate Investments PrincipalPaymentsReceivedOnCommercialRealEstateInvestments	1669900000	USD
CY2019	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	24955000	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
CY2017	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	67675100000	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
CY2017	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	67675100000	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
CY2017	nly	Proceeds From Unconsolidated Joint Venture Excess Of Cumulative Earnings ProceedsFromUnconsolidatedJointVentureExcessOfCumulativeEarnings	7998000	USD
CY2019	us-gaap	Payments To Acquire Other Loans And Leases Held For Investment PaymentsToAcquireOtherLoansAndLeasesHeldForInvestment	2647129000	USD
CY2018	us-gaap	Payments To Acquire Other Loans And Leases Held For Investment PaymentsToAcquireOtherLoansAndLeasesHeldForInvestment	1286046000	USD
CY2017	us-gaap	Payments To Acquire Other Loans And Leases Held For Investment PaymentsToAcquireOtherLoansAndLeasesHeldForInvestment	928512000	USD
CY2019	us-gaap	Proceeds Of Other Loans And Leases Held For Investment ProceedsOfOtherLoansAndLeasesHeldForInvestment	845281000	USD
CY2018	us-gaap	Proceeds Of Other Loans And Leases Held For Investment ProceedsOfOtherLoansAndLeasesHeldForInvestment	347451000	USD
CY2017	us-gaap	Proceeds Of Other Loans And Leases Held For Investment ProceedsOfOtherLoansAndLeasesHeldForInvestment	185391000	USD
CY2019	nly	Payments To Acquire Trading Securities PaymentsToAcquireTradingSecurities	0	USD
CY2017	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	1022994000	USD
CY2019	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-1136000	USD
CY2019	us-gaap	Proceeds From Divestiture Of Interest In Subsidiaries And Affiliates ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates	0	USD
CY2018	us-gaap	Proceeds From Divestiture Of Interest In Subsidiaries And Affiliates ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates	0	USD
CY2017	us-gaap	Proceeds From Divestiture Of Interest In Subsidiaries And Affiliates ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates	5451000	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
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-14665948000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1029160000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	12228000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	1072000	USD
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	2054000	USD
CY2019	nly	Payments On Structured Debt Financing PaymentsOnStructuredDebtFinancing	0	USD
CY2018	nly	Payments On Structured Debt Financing PaymentsOnStructuredDebtFinancing	0	USD
CY2017	nly	Payments On Structured Debt Financing PaymentsOnStructuredDebtFinancing	12827000	USD
CY2019	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	26202000	USD
CY2018	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	716000	USD
CY2017	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	2365000	USD
CY2019	nly	Proceeds From Repurchase Agreements ProceedsFromRepurchaseAgreements	5470733256000	USD
CY2018	nly	Proceeds From Repurchase Agreements ProceedsFromRepurchaseAgreements	5117155986000	USD
CY2017	nly	Proceeds From Repurchase Agreements ProceedsFromRepurchaseAgreements	3606915741000	USD
CY2019	nly	Principal Payments On Repurchase Agreements PrincipalPaymentsOnRepurchaseAgreements	5449836013000	USD
CY2018	nly	Principal Payments On Repurchase Agreements PrincipalPaymentsOnRepurchaseAgreements	5116952444000	USD
CY2017	nly	Principal Payments On Repurchase Agreements PrincipalPaymentsOnRepurchaseAgreements	3594482419000	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
CY2017	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	2031959000	USD
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	1384333000	USD
CY2017	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-1104000	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
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2347058000	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
CY2017	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	185312000	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
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	1689016000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	1540886000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	1353172000	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
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	12200552000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	114980000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-833157000	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
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1539746000	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
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
CY2019Q4	nly	Receivable For Investment Securities Sold ReceivableForInvestmentSecuritiesSold	4792000	USD
CY2018Q4	nly	Receivable For Investment Securities Sold ReceivableForInvestmentSecuritiesSold	68779000	USD
CY2017Q4	nly	Receivable For Investment Securities Sold ReceivableForInvestmentSecuritiesSold	1232000	USD
CY2019Q4	nly	Payable For Investment Securities Purchased PayableForInvestmentSecuritiesPurchased	463387000	USD
CY2018Q4	nly	Payable For Investment Securities Purchased PayableForInvestmentSecuritiesPurchased	583036000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	706589000	USD
CY2019	us-gaap	Proceeds From Interest Received ProceedsFromInterestReceived	4811218000	USD
CY2018	us-gaap	Proceeds From Interest Received ProceedsFromInterestReceived	3894478000	USD
CY2017	us-gaap	Proceeds From Interest Received ProceedsFromInterestReceived	3447308000	USD
CY2019	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	8395000	USD
CY2018	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	7564000	USD
CY2017	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	5238000	USD
CY2017	nly	Interest Paid Excluding Interest Paid On Interest Rate Swaps InterestPaidExcludingInterestPaidOnInterestRateSwaps	987958000	USD
CY2019	nly	Interest Paid Net Interest Rate Derivative InterestPaidNetInterestRateDerivative	-323028000	USD
CY2018	nly	Interest Paid Net Interest Rate Derivative InterestPaidNetInterestRateDerivative	-1894000	USD
CY2017	nly	Interest Paid Net Interest Rate Derivative InterestPaidNetInterestRateDerivative	369660000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2284000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-295000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1502000	USD
CY2017Q4	nly	Payable For Investment Securities Purchased PayableForInvestmentSecuritiesPurchased	656581000	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
CY2017	nly	Net Change In Unrealized Gain Loss On Availableforsale Securities And Interest Rate Swaps Net Of Reclassification Adjustment NetChangeInUnrealizedGainLossOnAvailableforsaleSecuritiesAndInterestRateSwapsNetOfReclassificationAdjustment	-40127000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	357527000	USD
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	394129000	USD
CY2017Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	347876000	USD
CY2019	nly	Secured Debt Assumed Through Securitization Noncash Financing Activities SecuredDebtAssumedThroughSecuritizationNoncashFinancingActivities	874694000	USD
CY2018	nly	Secured Debt Assumed Through Securitization Noncash Financing Activities SecuredDebtAssumedThroughSecuritizationNoncashFinancingActivities	0	USD
CY2017	nly	Secured Debt Assumed Through Securitization Noncash Financing Activities SecuredDebtAssumedThroughSecuritizationNoncashFinancingActivities	315111000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	92623788000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-4197358000	USD
CY2019Q4	us-gaap	Investment Owned Balance Principal Amount InvestmentOwnedBalancePrincipalAmount	113123301000	USD
CY2019Q4	nly	Debt Securities Availableforsale Remaining Premium DebtSecuritiesAvailableforsaleRemainingPremium	5353597000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	114833580000	USD
CY2019Q4	nly	Debt Securities Availableforsale Remaining Discount DebtSecuritiesAvailableforsaleRemainingDiscount	166320000	USD
CY2019	us-gaap	Basis Of Accounting BasisOfAccounting	<div style="line-height:120%;padding-bottom:0px;text-align:justify;padding-left:0px;text-indent:0px;font-size:11pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:99.609375%;border-collapse:collapse;text-align:left;"><tr><td colspan="1"/></tr><tr><td style="width:100%;"/></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:justify;font-size:11pt;"><span style="font-family:Times New Roman;font-size:11pt;color:#00316c;font-style:normal;font-weight:bold;text-decoration:none;">2. BASIS OF PRESENTATION</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:6px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;">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="line-height:120%;padding-bottom:0px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;padding-bottom:0px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">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>
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
CY2019	nly	Paymentsto Acquire Debt Securities Availableforsale Excluding Variable Interest Entity PaymentstoAcquireDebtSecuritiesAvailableforsaleExcludingVariableInterestEntity	62948682000	USD
CY2019	nly	Proceedsfrom Saleof Debt Securities Availableforsale Excluding Variable Interest Entity ProceedsfromSaleofDebtSecuritiesAvailableforsaleExcludingVariableInterestEntity	26598711000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	17223971000	USD
CY2019	nly	Accretion Amortization Of Debt Securities Available For Sale AccretionAmortizationOfDebtSecuritiesAvailableForSale	-1113566000	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
CY2018Q4	us-gaap	Investment Owned Balance Principal Amount InvestmentOwnedBalancePrincipalAmount	96602237000	USD
CY2018Q4	nly	Available For Sale Securities Debt Securities Remaining Premium AvailableForSaleSecuritiesDebtSecuritiesRemainingPremium	5311495000	USD
CY2018Q4	nly	Available For Sale Securities Debt Securities Remaining Discount AvailableForSaleSecuritiesDebtSecuritiesRemainingDiscount	192979000	USD
CY2019	us-gaap	Revenue Recognition Interest RevenueRecognitionInterest	<div style="line-height:120%;padding-bottom:8px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Interest Income - </span><span style="font-family:inherit;font-size:10pt;">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 </span></div><div style="line-height:120%;padding-bottom:8px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">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="line-height:120%;padding-bottom:4px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">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="line-height:120%;padding-bottom:8px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">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). Refer to the “Interest Income and Interest Expense” Note for further discussion of interest income.</span></div>
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	94853660000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	379619000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2609491000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	92623788000	USD
CY2017	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	-6400000	USD
CY2019	nly	Mortgage Backed Securities Sold Carrying Value MortgageBackedSecuritiesSoldCarryingValue	25500000000	USD
CY2019	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	-37800000	USD
CY2018	nly	Mortgage Backed Securities Sold Carrying Value MortgageBackedSecuritiesSoldCarryingValue	45600000000	USD
CY2018	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	-1100000000	USD
CY2017	nly	Mortgage Backed Securities Sold Carrying Value MortgageBackedSecuritiesSoldCarryingValue	12900000000	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
CY2019Q4	nly	Loans Receivable With Loan Loss Provision Gross LoansReceivableWithLoanLossProvisionGross	63200000	USD
CY2018Q4	nly	Loans Receivable With Loan Loss Provision Gross LoansReceivableWithLoanLossProvisionGross	7000000.0	USD
CY2019Q4	nly	Loans Receivable With Loan Loss Provision Net LoansReceivableWithLoanLossProvisionNet	43100000	USD
CY2018Q4	nly	Loans Receivable With Loan Loss Provision Net LoansReceivableWithLoanLossProvisionNet	3500000	USD
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20100000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	3500000	USD
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4585975000	USD
CY2019	us-gaap	Mortgage Loans On Real Estate New Mortgage Loans MortgageLoansOnRealEstateNewMortgageLoans	4384684000	USD
CY2019	us-gaap	Mortgage Loans On Real Estate Cost Of Mortgages Sold MortgageLoansOnRealEstateCostOfMortgagesSold	3768246000	USD
CY2019	srt	Mortgage Loans On Real Estate Collections Of Principal MortgageLoansOnRealEstateCollectionsOfPrincipal	726064000	USD
CY2019	nly	Mortgage Loanson Real Estate Gains Losses MortgageLoansonRealEstateGainsLosses	-20835000	USD
CY2019	nly	Sec Schedule1229 Real Estate Companies Investment In Mortgage Loans On Real Estate Amortization Accretion Of Premium SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateAmortizationAccretionOfPremium	-6836000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4462350000	USD
CY2019	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	0.92
CY2018	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	0.88
CY2019Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	8300000	USD
CY2018Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	7600000	USD
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2019Q4	nly	Held To Maturity Securities Corporate Debt HeldToMaturitySecuritiesCorporateDebt	2144850000	USD
CY2018Q4	nly	Held To Maturity Securities Corporate Debt HeldToMaturitySecuritiesCorporateDebt	1887182000	USD
CY2019Q4	nly	Held To Maturity Securities Corporate Debt HeldToMaturitySecuritiesCorporateDebt	2144850000	USD
CY2018Q4	nly	Held To Maturity Securities Corporate Debt HeldToMaturitySecuritiesCorporateDebt	1887182000	USD
CY2018Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	557813000	USD
CY2017Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	580860000	USD
CY2019	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	0	USD
CY2018	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-4000	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
CY2018	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	56721000	USD
CY2019	us-gaap	Servicing Asset At Fair Value Other Changes That Affect Balance ServicingAssetAtFairValueOtherChangesThatAffectBalance	-77719000	USD
CY2018	us-gaap	Servicing Asset At Fair Value Other Changes That Affect Balance ServicingAssetAtFairValueOtherChangesThatAffectBalance	-79764000	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
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	0	USD
CY2019	nly	Number Of Real Estate Properties Purchased NumberOfRealEstatePropertiesPurchased	0	property
CY2019	nly	Weighted Average Amortization Period WeightedAverageAmortizationPeriod	P6Y
CY2018Q4	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	420365000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	803866000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	889750000	USD
CY2019Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	704354000	USD
CY2018Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	721664000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	87532000	USD
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	67026000	USD
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	616822000	USD
CY2018Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	654638000	USD
CY2019Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	108816000	USD
CY2018Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	84835000	USD
CY2019Q4	us-gaap	Real Estate Investments RealEstateInvestments	725638000	USD
CY2018Q4	us-gaap	Real Estate Investments RealEstateInvestments	739473000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	46885000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	46758000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	42918000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	40211000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	34332000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	177936000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	389040000	USD
CY2019Q4	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	1199000	USD
CY2018Q4	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	48114000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	113556000	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	200503000	USD
CY2019Q4	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	706862000	USD
CY2019Q4	nly	Repurchase Agreements Weighted Average Rates RepurchaseAgreementsWeightedAverageRates	0.0203
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	81115874000	USD
CY2019	nly	Gain Loss On Termination Of Interest Rate Swaps GainLossOnTerminationOfInterestRateSwaps	-1442964000	USD
CY2019	nly	Gain Loss On Realized Interest Rate Swaps GainLossOnRealizedInterestRateSwaps	351375000	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
CY2017	nly	Gain Loss On Realized Interest Rate Swaps GainLossOnRealizedInterestRateSwaps	-371108000	USD
CY2017	nly	Gain Loss On Termination Of Interest Rate Swaps GainLossOnTerminationOfInterestRateSwaps	-160133000	USD
CY2017	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	512918000	USD
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-680770000	USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-404013000	USD
CY2019Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	672200000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	71800000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	29039000	USD
CY2019	nly	Intangible Assets Divested IntangibleAssetsDivested	454000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7628000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	20957000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	101700000000	USD
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	81100000000	USD
CY2019Q4	nly	Repurchase Agreements Weighted Average Borrowing Rates RepurchaseAgreementsWeightedAverageBorrowingRates	0.0199
CY2018Q4	nly	Repurchase Agreements Weighted Average Borrowing Rates RepurchaseAgreementsWeightedAverageBorrowingRates	0.0236
CY2019	us-gaap	Repurchase Agreement Counterparty Weighted Average Maturity Of Agreements1 RepurchaseAgreementCounterpartyWeightedAverageMaturityOfAgreements1	P65D
CY2018	us-gaap	Repurchase Agreement Counterparty Weighted Average Maturity Of Agreements1 RepurchaseAgreementCounterpartyWeightedAverageMaturityOfAgreements1	P77D
CY2019Q4	nly	Securities Soldunder Agreementsto Repurchase Maximum Available Under Counterparty Arrangements SecuritiesSoldunderAgreementstoRepurchaseMaximumAvailableUnderCounterpartyArrangements	1100000000	USD
CY2019Q4	nly	Securities Soldunder Agreementsto Repurchase Commitments Available SecuritiesSoldunderAgreementstoRepurchaseCommitmentsAvailable	796900000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	12989000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	3491000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	20034000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	3844000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	3980000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	101740728000	USD
CY2018Q4	nly	Repurchase Agreements Weighted Average Rates RepurchaseAgreementsWeightedAverageRates	0.0297
CY2018	nly	Percent Of Total Repurchase Agreements With Remaining Maturity Over1 Year PercentOfTotalRepurchaseAgreementsWithRemainingMaturityOver1Year	0.01
CY2019	us-gaap	Schedule Of Repurchase Agreements ScheduleOfRepurchaseAgreements	<span style="font-family:inherit;font-size:10pt;">December 31, 2019</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">2018</span><span style="font-family:inherit;font-size:10pt;">. Refer to the “Derivative Instruments” Note for information related to the effect of netting arrangements on the Company’s derivative instruments.</span><div style="line-height:120%;padding-bottom:16px;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:89.84375%;border-collapse:collapse;text-align:left;"><tr><td colspan="16"/></tr><tr><td style="width:25%;"/><td style="width:1%;"/><td style="width:16%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:16%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:16%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:16%;"/><td style="width:1%;"/></tr><tr><td style="vertical-align:bottom;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#ffffff;font-style:normal;font-weight:bold;text-decoration:none;"> </span></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #ffffff;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#ffffff;font-style:normal;font-weight:bold;text-decoration:none;">December 31, 2019</span></div></td><td style="vertical-align:bottom;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #ffffff;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#ffffff;font-style:normal;font-weight:bold;text-decoration:none;">December 31, 2018</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#ffffff;font-style:normal;font-weight:bold;text-decoration:none;"> </span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#ffffff;font-style:normal;font-weight:bold;text-decoration:none;">Reverse Repurchase Agreements</span></div></td><td style="vertical-align:bottom;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#ffffff;font-style:normal;font-weight:bold;text-decoration:none;">Repurchase Agreements</span></div></td><td style="vertical-align:bottom;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#ffffff;font-style:normal;font-weight:bold;text-decoration:none;">Reverse Repurchase Agreements</span></div></td><td style="vertical-align:bottom;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#00316c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-right:1px solid #000000;"><div style="text-align:center;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#ffffff;font-style:normal;font-weight:bold;text-decoration:none;">Repurchase Agreements</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#7d91a6;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#ffffff;font-style:normal;font-weight:bold;text-decoration:none;"> </span></div></td><td colspan="15" style="vertical-align:bottom;background-color:#7d91a6;padding-left:2px;padding-top:2px;padding-bottom:2px;border-right:1px solid #000000;"><div style="text-align:center;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#ffffff;font-style:normal;font-weight:bold;text-decoration:none;">(dollars in thousands)</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Gross amounts</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>100,000</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>101,840,728</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>650,040</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>81,115,874</span></span></div></td><td style="vertical-align:bottom;border-right:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#e5e5e5;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Amounts offset</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#e5e5e5;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>(100,000</span></span></div></td><td style="vertical-align:bottom;background-color:#e5e5e5;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;background-color:#e5e5e5;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#e5e5e5;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>(100,000</span></span></div></td><td style="vertical-align:bottom;background-color:#e5e5e5;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;background-color:#e5e5e5;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#e5e5e5;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>—</span></span></div></td><td style="vertical-align:bottom;background-color:#e5e5e5;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#e5e5e5;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#e5e5e5;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>—</span></span></div></td><td style="vertical-align:bottom;background-color:#e5e5e5;border-right:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Netted amounts</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>—</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>101,740,728</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>650,040</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>81,115,874</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-right:1px solid #000000;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;"><br/></span></div>
CY2019	nly	Securities For Reverse Repurchase Agreements Gross Amounts SecuritiesForReverseRepurchaseAgreementsGrossAmounts	100000000	USD
CY2019	nly	Securities Sold Under Agreements To Repurchase Gross Amounts SecuritiesSoldUnderAgreementsToRepurchaseGrossAmounts	101840728000	USD
CY2018	nly	Securities For Reverse Repurchase Agreements Gross Amounts SecuritiesForReverseRepurchaseAgreementsGrossAmounts	650040000	USD
CY2018	nly	Securities Sold Under Agreements To Repurchase Gross Amounts SecuritiesSoldUnderAgreementsToRepurchaseGrossAmounts	81115874000	USD
CY2019	nly	Securities For Reverse Repurchase Agreements Amounts Offset SecuritiesForReverseRepurchaseAgreementsAmountsOffset	100000000	USD
CY2019	nly	Securities Sold Under Agreements To Repurchase Amounts Offset SecuritiesSoldUnderAgreementsToRepurchaseAmountsOffset	100000000	USD
CY2018	nly	Securities For Reverse Repurchase Agreements Amounts Offset SecuritiesForReverseRepurchaseAgreementsAmountsOffset	0	USD
CY2018	nly	Securities Sold Under Agreements To Repurchase Amounts Offset SecuritiesSoldUnderAgreementsToRepurchaseAmountsOffset	0	USD
CY2019Q4	us-gaap	Securities For Reverse Repurchase Agreements SecuritiesForReverseRepurchaseAgreements	0	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	101740728000	USD
CY2018Q4	us-gaap	Securities For Reverse Repurchase Agreements SecuritiesForReverseRepurchaseAgreements	650040000	USD
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	81115874000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral	0	USD
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral	650000000.0	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
CY2018Q4	nly	Collateral Held On Repurchase Agreements After Effect Of Interest Rate Swaps Fair Value CollateralHeldOnRepurchaseAgreementsAfterEffectOfInterestRateSwapsFairValue	90200000000	USD
CY2018Q4	nly	Repurchase Agreements Accrued Interest RepurchaseAgreementsAccruedInterest	303100000	USD
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1924050000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	1430106199	shares
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	446293000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	490631000	USD
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2914850000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	1313763450	shares
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	1500000000	USD
CY2019Q4	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	26200000	shares
CY2019Q4	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	223200000	USD
CY2019	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	180000	shares
CY2018	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	302000	shares
CY2019	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	1795000	USD
CY2018	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3144000	USD
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	85150000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	75950000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	81900000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	73400000	shares
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	1982026000	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	1778168000	USD
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Preferred Stock Redemption Price Per Share PreferredStockRedemptionPricePerShare	25.00
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1516323000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1457007000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.05
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.20
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	357527000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	394129000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.25
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.30
CY2018	us-gaap	Interest Expense Other InterestExpenseOther	100917000	USD
CY2017	us-gaap	Interest Expense Other InterestExpenseOther	56036000	USD
CY2019	us-gaap	Interest Expense InterestExpense	2784875000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1569016000	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
CY2017	nly	Interest Income Securities Mortgage Backed And Agency Debentures InterestIncomeSecuritiesMortgageBackedAndAgencyDebentures	2170041000	USD
CY2019	nly	Interest Income Residential Mortgage Loans InterestIncomeResidentialMortgageLoans	150066000	USD
CY2018	nly	Interest Income Residential Mortgage Loans InterestIncomeResidentialMortgageLoans	83260000	USD
CY2017	nly	Interest Income Residential Mortgage Loans InterestIncomeResidentialMortgageLoans	30540000	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
CY2017	nly	Interest Income Commercial Real Estate Debt And Preferred Equity InterestIncomeCommercialRealEstateDebtAndPreferredEquity	273884000	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
CY2017	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	0	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
CY2017	us-gaap	Interest Income Securities Purchased Under Agreements To Resell InterestIncomeSecuritiesPurchasedUnderAgreementsToResell	18661000	USD
CY2019	us-gaap	Interest Income Operating InterestIncomeOperating	3787297000	USD
CY2018	us-gaap	Interest Income Operating InterestIncomeOperating	3332563000	USD
CY2017	us-gaap	Interest Income Operating InterestIncomeOperating	2493126000	USD
CY2019	nly	Interest Paid On Repurchase Agreements InterestPaidOnRepurchaseAgreements	2513282000	USD
CY2018	nly	Interest Paid On Repurchase Agreements InterestPaidOnRepurchaseAgreements	1698930000	USD
CY2017	nly	Interest Paid On Repurchase Agreements InterestPaidOnRepurchaseAgreements	891819000	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
CY2017	nly	Interest Expense Securitized Debt Of Consolidated Vie InterestExpenseSecuritizedDebtOfConsolidatedVie	60304000	USD
CY2019	nly	Interest Expense Participation Sold InterestExpenseParticipationSold	0	USD
CY2018	nly	Interest Expense Participation Sold InterestExpenseParticipationSold	0	USD
CY2017	nly	Interest Expense Participation Sold InterestExpenseParticipationSold	195000	USD
CY2019	us-gaap	Interest Expense Other InterestExpenseOther	129612000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1002422000	USD
CY2019Q1	nly	Stockholders Equity Amount Used In Determining Monthly Management Fee StockholdersEquityAmountUsedInDeterminingMonthlyManagementFee	17280000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	1897860000	USD
CY2017	us-gaap	Interest Expense InterestExpense	1008354000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1434703000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1484772000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-2163091000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	54148000	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
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-588000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-2162865000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	54408000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	1569604000	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
CY2017	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	109635000	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
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1459969000	USD
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
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1065923652	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
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	427964	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
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1066351616	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.60
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.06
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.37
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.60
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.06
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.37
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	200000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	800000	shares
CY2019	nly	Percentage Of Taxable Income Required To Be Distributed While Operating As Reit PercentageOfTaxableIncomeRequiredToBeDistributedWhileOperatingAsReit	1
CY2019	nly	Operating Lease Remaining Lease Term OperatingLeaseRemainingLeaseTerm	P6Y
CY2019Q1	nly	Monthly Management Fee Percentage Of Stockholders Equity Over A Predetermined Amount Used In Calculating Total Management Fee MonthlyManagementFeePercentageOfStockholdersEquityOverAPredeterminedAmountUsedInCalculatingTotalManagementFee	0.0075
CY2019Q1	nly	Stockholders Equity Amount Used In Determining Monthly Management Fee StockholdersEquityAmountUsedInDeterminingMonthlyManagementFee	17280000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	3200000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	-1776413000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15786000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	20439000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y8M12D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.029
CY2019Q4	us-gaap	Operating Lease Payments OperatingLeasePayments	3712000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3799000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3918000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3862000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3862000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	3862000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	2895000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	22198000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1759000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	20439000	USD
CY2019Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	0	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-846670000	USD
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-594000	USD
CY2019Q4	us-gaap	Interest Income Operating InterestIncomeOperating	1074214000	USD
CY2019Q3	us-gaap	Interest Income Operating InterestIncomeOperating	919299000	USD
CY2019Q2	us-gaap	Interest Income Operating InterestIncomeOperating	927598000	USD
CY2019Q1	us-gaap	Interest Income Operating InterestIncomeOperating	866186000	USD
CY2019Q4	us-gaap	Interest Expense InterestExpense	620058000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	766905000	USD
CY2019Q2	us-gaap	Interest Expense InterestExpense	750217000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	647695000	USD
CY2019Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	454156000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	152394000	USD
CY2019Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	177381000	USD
CY2019Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	218491000	USD
CY2019Q4	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	785687000	USD
CY2019Q3	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-875406000	USD
CY2019Q2	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-1909482000	USD
CY2019Q1	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-1011926000	USD
CY2019Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	42656000	USD
CY2019Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	35074000	USD
CY2019Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	28181000	USD
CY2019Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	30502000	USD
CY2019Q4	us-gaap	Noninterest Expense NoninterestExpense	73351000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	66138000	USD
CY2019Q2	us-gaap	Noninterest Expense NoninterestExpense	78408000	USD
CY2019Q1	us-gaap	Noninterest Expense NoninterestExpense	83737000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1209148000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	-747169000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	315623000	USD
CY2018Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	334114000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-754076000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1782328000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-6907000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5915000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2581000	USD
CY2019Q4	us-gaap	Profit Loss ProfitLoss	1209742000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	-849251000	USD
CY2019Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	68000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-110000	USD
CY2019Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-83000	USD
CY2019Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-101000	USD
CY2019Q4	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	35509000	USD
CY2019Q3	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	36151000	USD
CY2019Q2	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	32422000	USD
CY2019Q1	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	32494000	USD
CY2019Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1174165000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-783210000	USD
CY2019Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-1808752000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-881644000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.54
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.24
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.63
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.54
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.24
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.63
CY2018Q4	us-gaap	Interest Income Operating InterestIncomeOperating	859674000	USD
CY2018Q3	us-gaap	Interest Income Operating InterestIncomeOperating	816596000	USD
CY2018Q2	us-gaap	Interest Income Operating InterestIncomeOperating	776806000	USD
CY2018Q1	us-gaap	Interest Income Operating InterestIncomeOperating	879487000	USD
CY2018Q4	us-gaap	Interest Expense InterestExpense	586774000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	500973000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	442692000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	367421000	USD
CY2018Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	272900000	USD
CY2018Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	512066000	USD
CY2018Q4	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	-2502035000	USD
CY2018Q3	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	199716000	USD
CY2018Q2	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	294646000	USD
CY2018Q1	us-gaap	Nonoperating Gains Losses NonoperatingGainsLosses	844689000	USD
CY2018Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	52377000	USD
CY2018Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-10643000	USD
CY2018Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	34170000	USD
CY2018Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	34023000	USD
CY2018Q4	us-gaap	Noninterest Expense NoninterestExpense	77073000	USD
CY2018Q3	us-gaap	Noninterest Expense NoninterestExpense	126509000	USD
CY2018Q2	us-gaap	Noninterest Expense NoninterestExpense	63781000	USD
CY2018Q1	us-gaap	Noninterest Expense NoninterestExpense	62510000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-2253831000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	378187000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	599149000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1328268000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1041000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7242000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3262000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	564000	USD
CY2018Q4	us-gaap	Profit Loss ProfitLoss	-2254872000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	385429000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	595887000	USD
CY2018Q1	us-gaap	Profit Loss ProfitLoss	1327704000	USD
CY2018Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	17000	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-149000	USD
CY2018Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-32000	USD
CY2018Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-96000	USD
CY2018Q4	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	32494000	USD
CY2018Q3	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	31675000	USD
CY2018Q2	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	31377000	USD
CY2018Q1	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	33766000	USD
CY2018Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2287383000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	353903000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	564542000	USD
CY2018Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1294034000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.74
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2018	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	0	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.12
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.74
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.12
CY2019	srt	Sec Schedule Iii Real Estate Number Of Units SECScheduleIIIRealEstateNumberOfUnits	46	property
CY2019Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	490631000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	121780000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	572457000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements	10117000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	121720000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	582634000	USD
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	704354000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	87532000	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
CY2016Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	448620000	USD
CY2019	nly	Real Estate Acquisitions And Improvements RealEstateAcquisitionsAndImprovements	5811000	USD
CY2018	nly	Real Estate Acquisitions And Improvements RealEstateAcquisitionsAndImprovements	279693000	USD
CY2017	nly	Real Estate Acquisitions And Improvements RealEstateAcquisitionsAndImprovements	1231000	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
CY2017	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	7880000	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
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	67026000	USD
CY2017Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	48920000	USD
CY2016Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	34221000	USD
CY2019	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	3166000	USD
CY2017	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	1052000	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
CY2017	us-gaap	Real Estate Accumulated Depreciation Period Increase Decrease RealEstateAccumulatedDepreciationPeriodIncreaseDecrease	15751000	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
CY2019Q4	srt	Mortgage Loans On Real Estate Face Amount Of Mortgages MortgageLoansOnRealEstateFaceAmountOfMortgages	686563000	USD
CY2019Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	669713000	USD

Files In Submission

Name	View Source	Status
0001628280-20-001548-index-headers.html	Edgar Link	pending
0001628280-20-001548-index.html	Edgar Link	pending
0001628280-20-001548.txt	Edgar Link	pending
0001628280-20-001548-xbrl.zip	Edgar Link	pending
a201910-knlyexhibit211.htm	Edgar Link	pending
a201910-knlyexhibit231.htm	Edgar Link	pending
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a2019nly10-k_htm.xml	Edgar Link	completed
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FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
fiveyearperfchart.jpg	Edgar Link	pending
logo10417a19.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
nly-20191231.xsd	Edgar Link	pending
nly-20191231_cal.xml	Edgar Link	unprocessable
nly-20191231_def.xml	Edgar Link	unprocessable
nly-20191231_lab.xml	Edgar Link	unprocessable
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$NLY
ANNALY CAPITAL MANAGEMENT INC Stock $nly

2019 Q4 Form 10-K Financial Statement

#000162828020001548 Filed on February 14, 2020

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

#000162828020001548 Filed on February 14, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NLY
ANNALY CAPITAL MANAGEMENT INC Stock $nly