$AGNC
AGNC Investment Corp. Stock $agnc

$agnc Overview Financials Valuation SEC Filings Company Website

2012 Q1 Form 10-K Financial Statement

#000142368912000005 Filed on February 23, 2012

Income Statement

Concept	2012 Q1	2010 Q4	2010 Q3
Revenue	$777.0M	$169.5M	$86.40M
YoY Change	331.19%	187.78%	90.31%
Cost Of Revenue	$128.0M	$29.10M	$21.20M
YoY Change	190.25%	83.02%	66.93%
Gross Profit	$649.0M	$140.4M	$65.20M
YoY Change	376.86%	226.51%	99.39%
Gross Profit Margin	83.53%	82.83%	75.46%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization
YoY Change
% of Gross Profit
Operating Expenses	$28.00M	$6.617M	$4.623M
YoY Change	154.55%	230.85%	208.2%
Operating Profit	$621.0M	$133.8M	$60.58M
YoY Change	396.4%	226.3%	94.16%
Interest Expense	$106.0M	$24.64M	$18.53M
YoY Change	194.44%
% of Operating Profit	17.07%	18.42%	30.59%
Other Income/Expense, Net
YoY Change
Pretax Income	$643.0M	$138.3M	$60.28M
YoY Change	379.85%	237.28%	93.2%
Income Tax	$2.000M	$200.0K	$300.0K
% Of Pretax Income	0.31%	0.14%	0.5%
Net Earnings	$641.0M	$138.1M	$60.03M
YoY Change	378.36%	239.26%	92.4%
Net Earnings / Revenue	82.5%	81.46%	69.48%
Basic Earnings Per Share
Diluted Earnings Per Share	$2.664M	$2.497M	$1.690M
COMMON SHARES
Basic Shares Outstanding	224.1M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2012 Q1	2010 Q4	2010 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.762B	$173.0M	$115.0M
YoY Change	485.38%	-14.78%	10.58%
Cash & Equivalents	$1.762B	$173.0M	$115.3M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$1.706B	$259.0M	$350.0M
Other Receivables	$0.00	$76.00M	$82.00M
Total Short-Term Assets	$3.468B	$508.0M	$547.0M
YoY Change	440.19%	73.38%	135.78%
LONG-TERM ASSETS
Property, Plant & Equipment
YoY Change
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$84.18B	$13.76B	$9.736B
YoY Change	198.6%	219.95%	183.19%
Other Assets	$315.0M	$76.00M	$62.00M
YoY Change	320.0%	280.0%	520.0%
Total Long-Term Assets	$84.95B	$13.97B	$9.812B
YoY Change	197.93%	222.36%	184.57%
TOTAL ASSETS
Total Short-Term Assets	$3.468B	$508.0M	$547.0M
Total Long-Term Assets	$84.95B	$13.97B	$9.812B
Total Assets	$88.42B	$14.48B	$10.36B
YoY Change	203.27%	212.92%	181.49%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$52.00M	$8.000M	$4.000M
YoY Change	225.0%	700.0%	300.0%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$69.87B	$11.75B	$8.050B
YoY Change	216.68%	205.91%	172.97%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$75.06B	$12.58B	$9.332B
YoY Change	191.84%	209.9%	188.74%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$4.643B	$324.0M	$114.0M
YoY Change	4892.47%	1605.26%	533.33%
Total Long-Term Liabilities	$4.643B	$324.0M	$114.0M
YoY Change	4892.47%	1605.26%	533.33%
TOTAL LIABILITIES
Total Short-Term Liabilities	$75.06B	$12.58B	$9.332B
Total Long-Term Liabilities	$4.643B	$324.0M	$114.0M
Total Liabilities	$79.70B	$12.90B	$9.446B
YoY Change	208.79%	216.35%	190.56%
SHAREHOLDERS EQUITY
Retained Earnings	$317.0M	$78.12M
YoY Change
Common Stock	$3.000M	$649.0K
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$8.718B	$1.573B	$913.0M
YoY Change
Total Liabilities & Shareholders Equity	$88.42B	$14.48B	$10.36B
YoY Change	203.27%	212.92%	181.49%

Cashflow Statement

Concept	2012 Q1	2010 Q4	2010 Q3
OPERATING ACTIVITIES
Net Income	$641.0M	$138.1M	$60.03M
YoY Change	378.36%	239.26%	92.4%
Depreciation, Depletion And Amortization
YoY Change
Cash From Operating Activities	$472.0M	$92.80M	$64.40M
YoY Change	268.75%	174.56%	132.49%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	-$24.10B	-$4.408B	-$1.586B
YoY Change	101.31%	380.67%	138.92%
Cash From Investing Activities	-$24.10B	-$4.408B	-$1.586B
YoY Change	101.31%	380.67%	138.92%
FINANCING ACTIVITIES
Cash Dividend Paid	$314.0M
YoY Change	245.05%
Common Stock Issuance & Retirement, Net	$2.063B	$227.0M
YoY Change	186.93%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$24.02B	4.373B	1.486B
YoY Change	100.67%	345.08%	121.75%
NET CHANGE
Cash From Operating Activities	$472.0M	92.80M	64.40M
Cash From Investing Activities	-$24.10B	-4.408B	-1.586B
Cash From Financing Activities	$24.02B	4.373B	1.486B
Net Change In Cash	$395.0M	57.50M	-34.90M
YoY Change	208.59%	-42.04%	-201.75%
FREE CASH FLOW
Cash From Operating Activities	$472.0M	$92.80M	$64.40M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	40417000	USD
CY2010Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	8452000	USD
CY2009	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-26084000	USD
CY2011	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-360681000	USD
CY2010	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-99114000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-68609000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	310294000	USD
CY2011Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	5937190000	USD
CY2010Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1561908000	USD
CY2009	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	45000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	94000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	176000	USD
CY2010Q4	us-gaap	Assets Assets	14475829000	USD
CY2011Q4	us-gaap	Assets Assets	57972297000	USD
CY2011Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	53502967000	USD
CY2010Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	13481492000	USD
CY2011Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	54504073000	USD
CY2010Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	13453541000	USD
CY2010Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	12270909000	USD
CY2011Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	50723703000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1366895000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	173258000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	202803000	USD
CY2008Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	56012000	USD
CY2009	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	146791000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	1193637000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-29545000	USD
CY2010	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	5.60
CY2009	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	5.15
CY2011	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	5.60
CY2011Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2011Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2011Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2011Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2010Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2010Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2010Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2010Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2010Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000	shares
CY2010Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000	shares
CY2010Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	64856	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	224150	shares
CY2010Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	64856	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	224150	shares
CY2010Q4	us-gaap	Common Stock Value CommonStockValue	649000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	2241000	USD
CY2011	us-gaap	Comparability Of Prior Year Financial Data ComparabilityOfPriorYearFinancialData	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Reclassifications</font></div><div style="line-height:120%;padding-top:12px;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain prior period amounts in the consolidated financial statements have been reclassified to conform to the current period presentation.</font></div></div>
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	200333000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1149383000	USD
CY2009	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	163391000	USD
CY2011Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	244057000	USD
CY2011Q4	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	476827000	USD
CY2011Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	154867000	USD
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	273632000	USD
CY2010Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	33068000	USD
CY2010Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	41607000	USD
CY2010Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	57436000	USD
CY2010Q4	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	68222000	USD
CY2011Q4	us-gaap	Debt Instrument Basis Spread On Variable Rate DebtInstrumentBasisSpreadOnVariableRate	0.00025
CY2011	us-gaap	Debt Instrument Description Of Variable Rate Basis DebtInstrumentDescriptionOfVariableRateBasis	LIBOR
CY2010Q4	us-gaap	Derivative Assets DerivativeAssets	76593000	USD
CY2011Q4	us-gaap	Derivative Assets DerivativeAssets	82567000	USD
CY2010Q4	us-gaap	Derivative Average Remaining Maturity DerivativeAverageRemainingMaturity	3.1
CY2011Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	14205000	USD
CY2010Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	15301000	USD
CY2011Q4	us-gaap	Derivative Higher Remaining Maturity Range DerivativeHigherRemainingMaturityRange	five
CY2010	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	-57042000	USD
CY2009	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	-30832000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	-140074000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	-1552000	USD
CY2009	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	633000	USD
CY2010	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	-340000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	-706972000	USD
CY2009	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	12066000	USD
CY2010	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	-20590000	USD
CY2011	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-462395000	USD
CY2009	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-3921000	USD
CY2010	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	44034000	USD
CY2011Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	852846000	USD
CY2010Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	78590000	USD
CY2011Q4	us-gaap	Derivative Lower Remaining Maturity Range DerivativeLowerRemainingMaturityRange	one
CY2009	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	96361000	USD
CY2010	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	229940000	USD
CY2011	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	886518000	USD
CY2011Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	313810000	USD
CY2010Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	90798000	USD
CY2011	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	5.02
CY2010	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	7.89
CY2009	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	6.78
CY2011Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.99
CY2011Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.39
CY2011Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.36
CY2011Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.48
CY2010Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	2.50
CY2010Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.69
CY2010Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.23
CY2010Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	2.13
CY2011Q4	us-gaap	Financial Instruments Owned Mortgages Mortgage Backed And Asset Backed Securities At Fair Value FinancialInstrumentsOwnedMortgagesMortgageBackedAndAssetBackedSecuritiesAtFairValue	54682717000	USD
CY2010Q4	us-gaap	Financial Instruments Owned Mortgages Mortgage Backed And Asset Backed Securities At Fair Value FinancialInstrumentsOwnedMortgagesMortgageBackedAndAssetBackedSecuritiesAtFairValue	13510280000	USD
CY2011Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	100973000	USD
CY2010Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	0	USD
CY2009	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	49947000	USD
CY2010	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	92009000	USD
CY2011	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	472975000	USD
CY2011Q2	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	93892000	USD
CY2011Q3	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	262768000	USD
CY2011Q1	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	4220000	USD
CY2011Q4	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	112095000	USD
CY2010Q2	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	29585000	USD
CY2010Q4	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	10451000	USD
CY2010Q1	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	27408000	USD
CY2010Q3	us-gaap	Gain Loss On Sales Of Mortgage Backed Securities Mbs GainLossOnSalesOfMortgageBackedSecuritiesMBS	24565000	USD
CY2009	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	6477000	USD
CY2010	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	7528000	USD
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	19114000	USD
CY2011Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	6126000	USD
CY2011Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	4546000	USD
CY2011Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	5845000	USD
CY2011Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	2597000	USD
CY2010Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	1681000	USD
CY2010Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	2134000	USD
CY2010Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	1926000	USD
CY2010Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	1787000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	288571000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	776685000	USD
CY2009	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	118946000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	177822000	USD
CY2011Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	213819000	USD
CY2011Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	251501000	USD
CY2011Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	133543000	USD
CY2010Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	53150000	USD
CY2010Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	60278000	USD
CY2010Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	138285000	USD
CY2010Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	36858000	USD
CY2009	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	335000	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	455000	USD
CY2009	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	209000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	31965000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	3617000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	34029000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	120924000	USD
CY2009	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	16356000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	259810000	USD
CY2010	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	56466000	USD
CY2009	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	936000	USD
CY2011	us-gaap	Interest Expense InterestExpense	284575000	USD
CY2010	us-gaap	Interest Expense InterestExpense	76026000	USD
CY2009	us-gaap	Interest Expense InterestExpense	43539000	USD
CY2011Q2	us-gaap	Interest Expense InterestExpense	63816000	USD
CY2011Q4	us-gaap	Interest Expense InterestExpense	90075000	USD
CY2011Q3	us-gaap	Interest Expense InterestExpense	95036000	USD
CY2011Q1	us-gaap	Interest Expense InterestExpense	35648000	USD
CY2010Q1	us-gaap	Interest Expense InterestExpense	15510000	USD
CY2010Q4	us-gaap	Interest Expense InterestExpense	24637000	USD
CY2010Q3	us-gaap	Interest Expense InterestExpense	18531000	USD
CY2010Q2	us-gaap	Interest Expense InterestExpense	17348000	USD
CY2010	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	176979000	USD
CY2011	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	824297000	USD
CY2009	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	84381000	USD
CY2011Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	200912000	USD
CY2011Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	231718000	USD
CY2011Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	128845000	USD
CY2011Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	262822000	USD
CY2010Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	33241000	USD
CY2010Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	44069000	USD
CY2010Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	23287000	USD
CY2010Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	76382000	USD
CY2010	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	253005000	USD
CY2011	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	1108872000	USD
CY2009	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	127920000	USD
CY2011Q1	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	164493000	USD
CY2011Q4	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	352897000	USD
CY2011Q2	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	264728000	USD
CY2011Q3	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	326754000	USD
CY2010Q1	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	38797000	USD
CY2010Q2	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	50589000	USD
CY2010Q3	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	62600000	USD
CY2010Q4	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	101019000	USD
CY2011	us-gaap	Interest Paid InterestPaid	248535000	USD
CY2009	us-gaap	Interest Paid InterestPaid	38849000	USD
CY2010	us-gaap	Interest Paid InterestPaid	65899000	USD
CY2010Q4	us-gaap	Interest Rate Cash Flow Hedge Derivative At Fair Value Net InterestRateCashFlowHedgeDerivativeAtFairValueNet	37722000	USD
CY2010Q4	us-gaap	Liabilities Liabilities	12903765000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	51760494000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	57972297000	USD
CY2010Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	14475829000	USD
CY2010	us-gaap	Loss On Cash Flow Hedge Ineffectiveness LossOnCashFlowHedgeIneffectiveness	-300000	USD
CY2011	us-gaap	Loss On Cash Flow Hedge Ineffectiveness LossOnCashFlowHedgeIneffectiveness	1600000	USD
CY2009	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2619502000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	8736281000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	39435658000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-39258053000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-8998618000	USD
CY2009	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2565941000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	232792000	USD
CY2009	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	93230000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1016032000	USD
CY2009	us-gaap	Net Income Loss NetIncomeLoss	118611000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	770480000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	288116000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	250401000	USD
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	208714000	USD
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	177822000	USD
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	133543000	USD
CY2010Q2	us-gaap	Net Income Loss NetIncomeLoss	36858000	USD
CY2010Q3	us-gaap	Net Income Loss NetIncomeLoss	60028000	USD
CY2010Q1	us-gaap	Net Income Loss NetIncomeLoss	53150000	USD
CY2010Q4	us-gaap	Net Income Loss NetIncomeLoss	138080000	USD
CY2010	us-gaap	Noninterest Income NoninterestIncome	130398000	USD
CY2011	us-gaap	Noninterest Income NoninterestIncome	26346000	USD
CY2009	us-gaap	Noninterest Income NoninterestIncome	45710000	USD
CY2011Q2	us-gaap	Noninterest Income NoninterestIncome	-6121000	USD
CY2011Q4	us-gaap	Noninterest Income NoninterestIncome	-24544000	USD
CY2011Q1	us-gaap	Noninterest Income NoninterestIncome	15749000	USD
CY2011Q3	us-gaap	Noninterest Income NoninterestIncome	41262000	USD
CY2010Q3	us-gaap	Noninterest Income NoninterestIncome	20832000	USD
CY2010Q1	us-gaap	Noninterest Income NoninterestIncome	33328000	USD
CY2010Q2	us-gaap	Noninterest Income NoninterestIncome	7718000	USD
CY2010Q4	us-gaap	Noninterest Income NoninterestIncome	68520000	USD
CY2011Q4	us-gaap	Notional Amount Of Derivatives NotionalAmountOfDerivatives	2600000000	USD
CY2009Q4	us-gaap	Notional Amount Of Interest Rate Cash Flow Hedge Derivatives NotionalAmountOfInterestRateCashFlowHedgeDerivatives	2050000000	USD
CY2011Q4	us-gaap	Notional Amount Of Interest Rate Cash Flow Hedge Derivatives NotionalAmountOfInterestRateCashFlowHedgeDerivatives	0	USD
CY2010Q4	us-gaap	Notional Amount Of Interest Rate Cash Flow Hedge Derivatives NotionalAmountOfInterestRateCashFlowHedgeDerivatives	6450000000	USD
CY2008Q4	us-gaap	Notional Amount Of Interest Rate Derivatives NotionalAmountOfInterestRateDerivatives	650000000	USD
CY2010Q4	us-gaap	Notional Amount Of Interest Rate Derivatives NotionalAmountOfInterestRateDerivatives	6450000000	USD
CY2009Q4	us-gaap	Notional Amount Of Interest Rate Derivatives NotionalAmountOfInterestRateDerivatives	2050000000	USD
CY2009	us-gaap	Operating Expenses OperatingExpenses	11145000	USD
CY2010	us-gaap	Operating Expenses OperatingExpenses	18806000	USD
CY2011	us-gaap	Operating Expenses OperatingExpenses	73958000	USD
CY2011Q1	us-gaap	Operating Expenses OperatingExpenses	11051000	USD
CY2011Q2	us-gaap	Operating Expenses OperatingExpenses	16969000	USD
CY2011Q3	us-gaap	Operating Expenses OperatingExpenses	21479000	USD
CY2011Q4	us-gaap	Operating Expenses OperatingExpenses	24459000	USD
CY2010Q3	us-gaap	Operating Expenses OperatingExpenses	4623000	USD
CY2010Q4	us-gaap	Operating Expenses OperatingExpenses	6617000	USD
CY2010Q2	us-gaap	Operating Expenses OperatingExpenses	4101000	USD
CY2010Q1	us-gaap	Operating Expenses OperatingExpenses	3465000	USD
CY2010Q4	us-gaap	Other Assets OtherAssets	57658000	USD
CY2011Q4	us-gaap	Other Assets OtherAssets	178582000	USD
CY2009	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	44780000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-87783000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	378903000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	23231000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	66235000	USD
CY2011Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	21324000	USD
CY2011Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	268113000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-26960000	USD
CY2010Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-69858000	USD
CY2010Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	20578000	USD
CY2010Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-11543000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-23815000	USD
CY2009	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	12066000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-650154000	USD
CY2011Q4	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	53592000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-512208000	USD
CY2011Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	61126000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-252664000	USD
CY2010Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-38906000	USD
CY2010Q4	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	67187000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-38620000	USD
CY2010Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-13476000	USD
CY2009	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	32714000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-63968000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1029057000	USD
CY2011Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-39802000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	318899000	USD
CY2011Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	214521000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	535439000	USD
CY2010Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1933000	USD
CY2010Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-137045000	USD
CY2010Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	59484000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	11660000	USD
CY2011Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	54061000	USD
CY2010Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	72927000	USD
CY2009	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2010	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2011	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2011Q4	us-gaap	Payables To Broker Dealers And Clearing Organizations PayablesToBrokerDealersAndClearingOrganizations	1919490000	USD
CY2010Q4	us-gaap	Payables To Broker Dealers And Clearing Organizations PayablesToBrokerDealersAndClearingOrganizations	727374000	USD
CY2009	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	9546000	USD
CY2010	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	-255853000	USD
CY2011	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	212016000	USD
CY2011	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	0	USD
CY2010	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	0	USD
CY2009	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	16410000	USD
CY2011	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	37864780000	USD
CY2010	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	247438000	USD
CY2009	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	0	USD
CY2011	us-gaap	Payments Of Dividends PaymentsOfDividends	663506000	USD
CY2010	us-gaap	Payments Of Dividends PaymentsOfDividends	173192000	USD
CY2009	us-gaap	Payments Of Dividends PaymentsOfDividends	80317000	USD
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	5163425000	USD
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1305142000	USD
CY2009	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	0	USD
CY2009	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	USD
CY2011	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	16781385000	USD
CY2010	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	USD
CY2009	us-gaap	Payments To Acquire Mortgage Backed Securities Mbs Categorized As Available For Sale PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale	9154890000	USD
CY2010	us-gaap	Payments To Acquire Mortgage Backed Securities Mbs Categorized As Available For Sale PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale	22645213000	USD
CY2011	us-gaap	Payments To Acquire Mortgage Backed Securities Mbs Categorized As Available For Sale PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale	81484105000	USD
CY2011Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2010Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000	shares
CY2010Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000	shares
CY2010Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2011Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2011Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2010Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2011Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2010Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2009	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	221596000	USD
CY2010	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1054755000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	4376698000	USD
CY2010	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	80822000	USD
CY2011	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	0	USD
CY2009	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	0	USD
CY2011	us-gaap	Proceeds From Payments For Securities Purchased Under Agreements To Resell ProceedsFromPaymentsForSecuritiesPurchasedUnderAgreementsToResell	37349460000	USD
CY2010	us-gaap	Proceeds From Payments For Securities Purchased Under Agreements To Resell ProceedsFromPaymentsForSecuritiesPurchasedUnderAgreementsToResell	0	USD
CY2009	us-gaap	Proceeds From Payments For Securities Purchased Under Agreements To Resell ProceedsFromPaymentsForSecuritiesPurchasedUnderAgreementsToResell	0	USD
CY2010	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	1300175000	USD
CY2009	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	0	USD
CY2011	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	5096171000	USD
CY2009	us-gaap	Proceeds From Sale Of Mortgage Backed Securities Mbs Categorized As Available For Sale ProceedsFromSaleOfMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale	6036601000	USD
CY2010	us-gaap	Proceeds From Sale Of Mortgage Backed Securities Mbs Categorized As Available For Sale ProceedsFromSaleOfMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale	12061961000	USD
CY2011	us-gaap	Proceeds From Sale Of Mortgage Backed Securities Mbs Categorized As Available For Sale ProceedsFromSaleOfMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale	37868448000	USD
CY2011	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	880000000	USD
CY2010	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	244800000	USD
CY2009	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	2495569000	USD
CY2010	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	7838257000	USD
CY2011	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	36001142000	USD
CY2010Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	258984000	USD
CY2011Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	442926000	USD
CY2011	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	18866000	USD
CY2009	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	0	USD
CY2010	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	7895000	USD
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	335904000	USD
CY2010Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	76094000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-37922000	USD
CY2010Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	78116000	USD
CY2010Q2	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	25.75
CY2011Q1	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	27.72
CY2010Q4	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	27.44
CY2009Q3	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	23.30
CY2011Q1	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	28.00
CY2011Q4	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	27.36
CY2009Q4	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	26.60
CY2010Q4	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	26.00
CY2011Q2	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	27.56
CY2010Q4	us-gaap	Sales And Excise Tax Payable Current And Noncurrent SalesAndExciseTaxPayableCurrentAndNoncurrent	500000	USD
CY2009Q4	us-gaap	Sales And Excise Tax Payable Current And Noncurrent SalesAndExciseTaxPayableCurrentAndNoncurrent	300000	USD
CY2011Q4	us-gaap	Sales And Excise Tax Payable Current And Noncurrent SalesAndExciseTaxPayableCurrentAndNoncurrent	2600000	USD
CY2010Q4	us-gaap	Secured Debt SecuredDebt	72900000	USD
CY2011Q4	us-gaap	Secured Debt SecuredDebt	54100000	USD
CY2010Q4	us-gaap	Securities Held As Collateral At Fair Value SecuritiesHeldAsCollateralAtFairValue	77900000	USD
CY2011Q4	us-gaap	Securities Held As Collateral At Fair Value SecuritiesHeldAsCollateralAtFairValue	58000000	USD
CY2011Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	47681234000	USD
CY2010Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	11680092000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	176000	USD
CY2009	us-gaap	Share Based Compensation ShareBasedCompensation	45000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	94000	USD
CY2011Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0040
CY2010Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0031
CY2011Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	49680000	shares
CY2011Q4	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	40530000	shares
CY2010Q4	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	13225000	shares
CY2010	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	28394000	shares
CY2011	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	149320000	shares
CY2009Q3	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	4313000	shares
CY2010Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	6900000	shares
CY2011Q1	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	32200000	shares
CY2010Q4	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	8269000	shares
CY2009Q4	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	5000000	shares
CY2011Q1	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	26910000	shares
CY2009	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	9313000	shares
CY2010	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1054755000	USD
CY2009	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	221596000	USD
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	4376698000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	1572064000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	6211803000	USD
CY2009Q4	us-gaap	Stockholders Equity StockholdersEquity	546822000	USD
CY2008Q4	us-gaap	Stockholders Equity StockholdersEquity	258151000	USD
CY2011	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</font><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;padding-top:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and revenues and expenses during the period reported. Actual results could differ from those estimates.</font></div></div>
CY2010	agnc	Additions Of Interest Rate Cash Flow Hedge Derivatives AdditionsOfInterestRateCashFlowHedgeDerivatives	4400000000	USD
CY2011	agnc	Additions Of Interest Rate Cash Flow Hedge Derivatives AdditionsOfInterestRateCashFlowHedgeDerivatives	17900000000	USD
CY2009	agnc	Additions Of Interest Rate Cash Flow Hedge Derivatives AdditionsOfInterestRateCashFlowHedgeDerivatives	1950000000	USD
CY2011Q4	agnc	Agency Securities Amortized Cost AgencySecuritiesAmortizedCost	53693671000	USD
CY2010Q4	agnc	Agency Securities Amortized Cost AgencySecuritiesAmortizedCost	13533896000	USD
CY2011Q4	agnc	Agency Securities Gross Unrealized Gain AgencySecuritiesGrossUnrealizedGain	1015446000	USD
CY2010Q4	agnc	Agency Securities Gross Unrealized Gain AgencySecuritiesGrossUnrealizedGain	73409000	USD
CY2010Q4	agnc	Agency Securities Pledged As Collateral Accrued Interest AgencySecuritiesPledgedAsCollateralAccruedInterest	43888000	USD
CY2011Q4	agnc	Agency Securities Pledged As Collateral Accrued Interest AgencySecuritiesPledgedAsCollateralAccruedInterest	161361000	USD
CY2010Q4	agnc	Agency Securities Pledged As Collateral Amortized Cost AgencySecuritiesPledgedAsCollateralAmortizedCost	12473350000	USD
CY2011Q4	agnc	Agency Securities Pledged As Collateral Amortized Cost AgencySecuritiesPledgedAsCollateralAmortizedCost	49443383000	USD
CY2011Q4	agnc	Agency Securities Pledged As Collateral Amortized Cost Under Repurchase Agreements AgencySecuritiesPledgedAsCollateralAmortizedCostUnderRepurchaseAgreements	50413641000	USD
CY2010Q4	agnc	Agency Securities Pledged As Collateral Amortized Cost Under Repurchase Agreements AgencySecuritiesPledgedAsCollateralAmortizedCostUnderRepurchaseAgreements	12434559000	USD
CY2011Q4	agnc	Agency Securities Pledged As Collateral Gross Unrealized Loss AgencySecuritiesPledgedAsCollateralGrossUnrealizedLoss	26400000	USD
CY2010Q4	agnc	Agency Securities Pledged As Collateral Gross Unrealized Loss AgencySecuritiesPledgedAsCollateralGrossUnrealizedLoss	97025000	USD
CY2010	agnc	Amortization Of Interest Rate Swap Termination Fee AmortizationOfInterestRateSwapTerminationFee	6278000	USD
CY2009	agnc	Amortization Of Interest Rate Swap Termination Fee AmortizationOfInterestRateSwapTerminationFee	10347000	USD
CY2011	agnc	Amortization Of Interest Rate Swap Termination Fee AmortizationOfInterestRateSwapTerminationFee	0	USD
CY2011Q4	agnc	Fair Value Of Cmo Securities Directly Held FairValueOfCmoSecuritiesDirectlyHeld	425500000	USD
CY2010	agnc	Future Prepayment Rate Assumption Of Investment Portfolio FuturePrepaymentRateAssumptionOfInvestmentPortfolio	0.12
CY2010Q4	agnc	Available For Sale Securities Weighted Average Life Coupon Rate AvailableForSaleSecuritiesWeightedAverageLifeCouponRate	0.0449
CY2011Q4	agnc	Available For Sale Securities Weighted Average Life Coupon Rate AvailableForSaleSecuritiesWeightedAverageLifeCouponRate	0.0411
CY2010	agnc	Average Margin Agency Securities AverageMarginAgencySecurities	0.0182
CY2011	agnc	Average Margin Agency Securities AverageMarginAgencySecurities	0.0177
CY2010	agnc	Average Reset Rate For Adjustable Rate Securities AverageResetRateForAdjustableRateSecurities	0.0276
CY2011	agnc	Average Reset Rate For Adjustable Rate Securities AverageResetRateForAdjustableRateSecurities	0.0271
CY2010	agnc	Average Underlying Index Rate On Agency Securities Based On Current Spot Rate AverageUnderlyingIndexRateOnAgencySecuritiesBasedOnCurrentSpotRate	0.0094
CY2011	agnc	Average Underlying Index Rate On Agency Securities Based On Current Spot Rate AverageUnderlyingIndexRateOnAgencySecuritiesBasedOnCurrentSpotRate	0.0094
CY2011	agnc	Cmo And Interest Only Pricincipal Only Securities Maximum Loss Exposure CmoAndInterestOnlyPricincipalOnlySecuritiesMaximumLossExposure	149900000	USD
CY2010	agnc	Cmo And Interest Only Pricincipal Only Securities Maximum Loss Exposure CmoAndInterestOnlyPricincipalOnlySecuritiesMaximumLossExposure	76100000	USD
CY2010Q4	agnc	Collateralized Agency Securities Sold But Not Settled CollateralizedAgencySecuritiesSoldButNotSettled	244700000	USD
CY2011Q4	agnc	Collateralized Agency Securities Sold But Not Settled CollateralizedAgencySecuritiesSoldButNotSettled	319300000	USD
CY2011	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	7.50
CY2010	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	5.49
CY2009	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	9.33
CY2011Q3	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	1.51
CY2011Q2	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	1.87
CY2011Q1	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	1.71
CY2011Q4	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	2.27
CY2010Q3	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	0.93
CY2010Q1	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	1.66
CY2010Q2	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	1.92
CY2010Q4	agnc	Comprehensive Income Per Share Basic And Diluted ComprehensiveIncomePerShareBasicAndDiluted	1.23
CY2010	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	455000	USD
CY2011	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	6205000	USD
CY2009	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	335000	USD
CY2011Q1	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	0	USD
CY2011Q4	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	5105000	USD
CY2011Q3	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	1100000	USD
CY2011Q2	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	0	USD
CY2010Q3	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	250000	USD
CY2010Q2	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	0	USD
CY2010Q4	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	205000	USD
CY2010Q1	agnc	Excise And Reit Income Tax ExciseAndReitIncomeTax	0	USD
CY2009	agnc	Expense Reimbursement To Manager ExpenseReimbursementToManager	3000000	USD
CY2011	agnc	Expense Reimbursement To Manager ExpenseReimbursementToManager	7000000	USD
CY2010	agnc	Expense Reimbursement To Manager ExpenseReimbursementToManager	3200000	USD
CY2010Q4	agnc	Fair Value Of Cmo Securities Directly Held FairValueOfCmoSecuritiesDirectlyHeld	458600000	USD
CY2011	agnc	Hedge De Designation Of Interest Rate Cash Flow Hedge Derivatives HedgeDeDesignationOfInterestRateCashFlowHedgeDerivatives	-23900000000	USD
CY2010	agnc	Hedge De Designation Of Interest Rate Cash Flow Hedge Derivatives HedgeDeDesignationOfInterestRateCashFlowHedgeDerivatives	0	USD
CY2009	agnc	Hedge De Designation Of Interest Rate Cash Flow Hedge Derivatives HedgeDeDesignationOfInterestRateCashFlowHedgeDerivatives	0	USD
CY2010Q4	agnc	Interest Rate Derivative Designated As Hedging Instruments Average Fixed Pay Rate InterestRateDerivativeDesignatedAsHedgingInstrumentsAverageFixedPayRate	0.0163
CY2010Q4	agnc	Interest Rate Derivative Designated As Hedging Instruments Average Fixed Receive Rate InterestRateDerivativeDesignatedAsHedgingInstrumentsAverageFixedReceiveRate	0.0026
CY2011	agnc	Loss On Derivative Instruments And Trading Securities Net LossOnDerivativeInstrumentsAndTradingSecuritiesNet	446629000	USD
CY2010	agnc	Loss On Derivative Instruments And Trading Securities Net LossOnDerivativeInstrumentsAndTradingSecuritiesNet	-38389000	USD
CY2009	agnc	Loss On Derivative Instruments And Trading Securities Net LossOnDerivativeInstrumentsAndTradingSecuritiesNet	4237000	USD
CY2011	agnc	Loss On Interest Only Securities Remeasured At Fair Value Through Earnings LossOnInterestOnlySecuritiesRemeasuredAtFairValueThroughEarnings	16400000	USD
CY2010	agnc	Loss On Interest Only Securities Remeasured At Fair Value Through Earnings LossOnInterestOnlySecuritiesRemeasuredAtFairValueThroughEarnings	-900000	USD
CY2011	agnc	Management Agreement Base Management Fee Description ManagementAgreementBaseManagementFeeDescription	one twelfth of 1.25%
CY2011	agnc	Management Agreement Base Management Fees Percentage Of Equity ManagementAgreementBaseManagementFeesPercentageOfEquity	0.00104
CY2011	agnc	Management Agreement Term Of Automatic Renewal Option ManagementAgreementTermOfAutomaticRenewalOption	P1Y
CY2011Q4	agnc	Management Fee Payable ManagementFeePayable	8100000	USD
CY2010Q4	agnc	Management Fee Payable ManagementFeePayable	1700000	USD
CY2010	agnc	Management Fees ManagementFees	11278000	USD
CY2009	agnc	Management Fees ManagementFees	4668000	USD
CY2011	agnc	Management Fees ManagementFees	54844000	USD
CY2011Q4	agnc	Management Fees ManagementFees	18333000	USD
CY2011Q2	agnc	Management Fees ManagementFees	12423000	USD
CY2011Q1	agnc	Management Fees ManagementFees	8454000	USD
CY2011Q3	agnc	Management Fees ManagementFees	15634000	USD
CY2010Q2	agnc	Management Fees ManagementFees	2314000	USD
CY2010Q3	agnc	Management Fees ManagementFees	2697000	USD
CY2010Q4	agnc	Management Fees ManagementFees	4483000	USD
CY2010Q1	agnc	Management Fees ManagementFees	1784000	USD
CY2010Q4	agnc	Obligation To Return Securities Borrowed Under Reverse Repurchase Agreements At Fair Value ObligationToReturnSecuritiesBorrowedUnderReverseRepurchaseAgreementsAtFairValue	245532000	USD
CY2011Q4	agnc	Obligation To Return Securities Borrowed Under Reverse Repurchase Agreements At Fair Value ObligationToReturnSecuritiesBorrowedUnderReverseRepurchaseAgreementsAtFairValue	898636000	USD
CY2010	agnc	Prepayment Rate Of Remaining Life Of Investment Portfolio PrepaymentRateOfRemainingLifeOfInvestmentPortfolio	0.12
CY2011	agnc	Prepayment Rate Of Remaining Life Of Investment Portfolio PrepaymentRateOfRemainingLifeOfInvestmentPortfolio	0.14
CY2011Q4	agnc	Principal Balance Of Securities Held As Collateral PrincipalBalanceOfSecuritiesHeldAsCollateral	54700000	USD
CY2010Q4	agnc	Principal Balance Of Securities Held As Collateral PrincipalBalanceOfSecuritiesHeldAsCollateral	73500000	USD
CY2011Q4	agnc	Principal Payments Receivable PrincipalPaymentsReceivable	18834000	USD
CY2010Q4	agnc	Principal Payments Receivable PrincipalPaymentsReceivable	75524000	USD
CY2011Q2	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	1368818000	USD
CY2011	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	4088798000	USD
CY2009Q3	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	95341000	USD
CY2011Q4	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	1108497000	USD
CY2009	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	221596000	USD
CY2010	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	723874000	USD
CY2009Q4	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	126255000	USD
CY2010Q2	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	168963000	USD
CY2011Q1	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	719250000	USD
CY2010Q4	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	226647000	USD
CY2011Q1	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	892233000	USD
CY2010Q4	agnc	Proceed From Issuance Of Common Stock Net Of Issuance Costs ProceedFromIssuanceOfCommonStockNetOfIssuanceCosts	328264000	USD
CY2011	agnc	Proceeds From Principal Collection Of Mortgage Backed Securities Categorized As Available For Sale ProceedsFromPrincipalCollectionOfMortgageBackedSecuritiesCategorizedAsAvailableForSale	4633034000	USD
CY2009	agnc	Proceeds From Principal Collection Of Mortgage Backed Securities Categorized As Available For Sale ProceedsFromPrincipalCollectionOfMortgageBackedSecuritiesCategorizedAsAvailableForSale	561894000	USD
CY2010	agnc	Proceeds From Principal Collection Of Mortgage Backed Securities Categorized As Available For Sale ProceedsFromPrincipalCollectionOfMortgageBackedSecuritiesCategorizedAsAvailableForSale	1581186000	USD
CY2009	agnc	Proceeds From Us Treasury Securities Sold Not Yet Purchased ProceedsFromUSTreasurySecuritiesSoldNotYetPurchased	0	USD
CY2010	agnc	Proceeds From Us Treasury Securities Sold Not Yet Purchased ProceedsFromUSTreasurySecuritiesSoldNotYetPurchased	0	USD
CY2011	agnc	Proceeds From Us Treasury Securities Sold Not Yet Purchased ProceedsFromUSTreasurySecuritiesSoldNotYetPurchased	17300545000	USD
CY2010	agnc	Realized Gain On Agency Securities RealizedGainOnAgencySecurities	-700000	USD
CY2011	agnc	Realized Gain On Agency Securities RealizedGainOnAgencySecurities	-9900000	USD
CY2010Q4	agnc	Receivable Under Reverse Repurchase Agreements ReceivableUnderReverseRepurchaseAgreements	247438000	USD
CY2011Q4	agnc	Receivable Under Reverse Repurchase Agreements ReceivableUnderReverseRepurchaseAgreements	762899000	USD
CY2011Q4	agnc	Repurchase Agreements Weighted Average Days To Maturity RepurchaseAgreementsWeightedAverageDaysToMaturity	51
CY2010Q4	agnc	Repurchase Agreements Weighted Average Days To Maturity RepurchaseAgreementsWeightedAverageDaysToMaturity	22
CY2011	agnc	Required Annual Distribution Of Taxable Net Income RequiredAnnualDistributionOfTaxableNetIncome	0.90
CY2011Q4	agnc	Restricted Cash Pledged As Collateral RestrictedCashPledgedAsCollateral	306100000	USD
CY2011Q4	agnc	Risk Of Repurchase Agreement To Stockholders Equity RiskOfRepurchaseAgreementToStockholdersEquity	0.05
CY2010Q4	agnc	Risk Of Repurchase Agreement To Stockholders Equity RiskOfRepurchaseAgreementToStockholdersEquity	0.05
CY2011Q4	agnc	Securitized Cmo Securities SecuritizedCmoSecurities	429400000	USD
CY2010Q4	agnc	Securitized Cmo Securities SecuritizedCmoSecurities	463600000	USD
CY2011	agnc	Summary Of Continuous Unrealized Loss Positions Of Available For Sale Securitytext Block SummaryOfContinuousUnrealizedLossPositionsOfAvailableForSaleSecuritytextBlock	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The following table presents the gross unrealized loss and fair values of our available-for-sale agency securities by length of time that such securities have been in a continuous unrealized loss position as of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2011</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2010</font><font style="font-family:inherit;font-size:10pt;"> (in thousands):</font></div><div style="line-height:120%;text-align:justify;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;"><br clear="none"/></font></div><div style="line-height:120%;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:88.4765625%;border-collapse:collapse;text-align:left;"><tr><td colspan="25" rowspan="1"></td></tr><tr><td width="26%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="10%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="2%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="8%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="9%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="8%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="10%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="10%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="23" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Unrealized Loss Position For</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Less than 12 Months</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">12 Months or More</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Total</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Agency Securities Classified as</font></div><div style="text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Available-for-Sale</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1"><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Estimated Fair</font></div><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Value</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1"><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Unrealized</font></div><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Loss</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Estimated</font></div><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Fair Value</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Unrealized</font></div><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Loss</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Estimated Fair</font></div><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Value</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Unrealized</font></div><div style="font-weight:bold;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Loss</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">December 31, 2011</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">1,134,847</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">(5,710</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">)</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">—</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">—</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">1,134,847</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">(5,710</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">)</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">December 31, 2010</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">7,498,384</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">(96,445</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">)</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">7,498,384</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">(96,445</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">)</font></div></td></tr></table></div></div></div>
CY2009	agnc	Terminations Of Interest Rate Cash Flow Hedge Derivatives TerminationsOfInterestRateCashFlowHedgeDerivatives	-550000000	USD
CY2011	agnc	Terminations Of Interest Rate Cash Flow Hedge Derivatives TerminationsOfInterestRateCashFlowHedgeDerivatives	-450000000	USD
CY2010	agnc	Terminations Of Interest Rate Cash Flow Hedge Derivatives TerminationsOfInterestRateCashFlowHedgeDerivatives	0	USD
CY2011Q4	agnc	Total Agency Securities TotalAgencySecurities	54682717000	USD
CY2010Q4	agnc	Total Agency Securities TotalAgencySecurities	13510280000	USD
CY2011Q4	agnc	Total Fair Value Of Agency Securities Pledged And Accrued Interest TotalFairValueOfAgencySecuritiesPledgedAndAccruedInterest	51308053000	USD
CY2010Q4	agnc	Total Fair Value Of Agency Securities Pledged And Accrued Interest TotalFairValueOfAgencySecuritiesPledgedAndAccruedInterest	12559825000	USD
CY2011	agnc	Transfers Between Hierarchy Levels TransfersBetweenHierarchyLevels	0
CY2010	agnc	Transfers Between Hierarchy Levels TransfersBetweenHierarchyLevels	0
CY2011	agnc	Unamortized Principal Balance Of Interest Only Strips UnamortizedPrincipalBalanceOfInterestOnlyStrips	1100000000	USD
CY2010	agnc	Unamortized Principal Balance Of Interest Only Strips UnamortizedPrincipalBalanceOfInterestOnlyStrips	500000000	USD
CY2011	agnc	Unamortized Principal Balance Of Principal Only Strips UnamortizedPrincipalBalanceOfPrincipalOnlyStrips	40000000	USD
CY2011	agnc	Undistributed Taxable Income UndistributedTaxableIncome	180000000	USD
CY2010	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	38389000	USD
CY2009	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	-4237000	USD
CY2011	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	-446629000	USD
CY2011Q4	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	-136639000	USD
CY2011Q2	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	-100013000	USD
CY2011Q1	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	11529000	USD
CY2011Q3	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	-221506000	USD
CY2010Q3	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	-3733000	USD
CY2010Q4	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	58069000	USD
CY2010Q1	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	5920000	USD
CY2010Q2	agnc	Unrealized Gain Loss On Derivative Instrument And Trading Securities UnrealizedGainLossOnDerivativeInstrumentAndTradingSecurities	-21867000	USD
CY2011	agnc	Unrealized Gain On Derivative Instrument And Trading Securities UnrealizedGainOnDerivativeInstrumentAndTradingSecurities	16400000	USD
CY2010	agnc	Unrealized Gain On Derivative Instrument And Trading Securities UnrealizedGainOnDerivativeInstrumentAndTradingSecurities	900000	USD
CY2011	agnc	Weighted Average Contractual Interest Rate Of Interest Only Strips WeightedAverageContractualInterestRateOfInterestOnlyStrips	0.0552
CY2010	agnc	Weighted Average Contractual Interest Rate Of Interest Only Strips WeightedAverageContractualInterestRateOfInterestOnlyStrips	0.0495
CY2011Q4	agnc	Weighted Average Coupon Rate WeightedAverageCouponRate	0.0423
CY2010Q4	agnc	Weighted Average Coupon Rate WeightedAverageCouponRate	0.0470
CY2010	agnc	Weighted Average Life Of Interest Only Securities WeightedAverageLifeOfInterestOnlySecurities	6.2	years
CY2011	agnc	Weighted Average Life Of Interest Only Securities WeightedAverageLifeOfInterestOnlySecurities	2.3	years
CY2011	agnc	Weighted Average Life Of Principal Only Securities WeightedAverageLifeOfPrincipalOnlySecurities	2.3	years
CY2011	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	153344000	shares
CY2009	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	17507000	shares
CY2010	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	36495000	shares
CY2011Q3	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	180725000	shares
CY2011Q4	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	210263000	shares
CY2011Q2	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	130467000	shares
CY2011Q1	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	90304000	shares
CY2010Q1	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	25002000	shares
CY2010Q3	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	35495000	shares
CY2010Q2	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	29872000	shares
CY2010Q4	agnc	Weighted Average Number Of Common Shares Outstanding Basic And Diluted WeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted	55291000	shares
CY2011Q4	agnc	Weighted Average Yield Percentage WeightedAverageYieldPercentage	0.0307
CY2010Q4	agnc	Weighted Average Yield Percentage WeightedAverageYieldPercentage	0.0331
CY2011	agnc	Weighted Average Yield Percentage For Period WeightedAverageYieldPercentageForPeriod	0.0319
CY2010	agnc	Weighted Average Yield Percentage For Period WeightedAverageYieldPercentageForPeriod	0.0344
CY2011	dei	Amendment Flag AmendmentFlag	false
CY2011	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2011	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2011	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2011
CY2011	dei	Document Period End Date DocumentPeriodEndDate	2011-12-31
CY2011	dei	Document Type DocumentType	10-K
CY2011	dei	Entity Central Index Key EntityCentralIndexKey	0001423689
CY2012Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	224149759	shares
CY2011	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2011	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2011Q2	dei	Entity Public Float EntityPublicFloat	5200000000	USD
CY2011	dei	Entity Registrant Name EntityRegistrantName	American Capital Agency Corp
CY2011	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2011	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2011	dei	Trading Symbol TradingSymbol	AGNC
CY2010Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	-848897000	USD
CY2011Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	-103074000	USD

Files In Submission

Name	View Source	Status
0001423689-12-000005-index-headers.html	Edgar Link	pending
0001423689-12-000005-index.html	Edgar Link	pending
0001423689-12-000005.txt	Edgar Link	pending
0001423689-12-000005-xbrl.zip	Edgar Link	pending
a10yrtreasv6.jpg	Edgar Link	pending
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$AGNC
AGNC Investment Corp. Stock $agnc

2012 Q1 Form 10-K Financial Statement

#000142368912000005 Filed on February 23, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AGNC AGNC Investment Corp. Stock $agnc

2012 Q1 Form 10-K Financial Statement

#000142368912000005 Filed on February 23, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AGNC
AGNC Investment Corp. Stock $agnc