Federal Home Loan Mortgage (FMCC) 10-Q 6 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 23, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'FEDERAL HOME LOAN MORTGAGE CORP	'
Entity Central Index Key	'0001026214	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Well-known Seasoned Issuer	'No	'
Entity Voluntary Filers	'No	'
Entity Current Reporting Status	'Yes	'
Entity Common Stock, Shares Outstanding	'	650,040,391

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest income	'	'	'	'
Total mortgage loans	$15,791	$16,069	$47,846	$48,696
Investments in securities	1,423	1,871	4,457	6,047
Other	8	7	19	37
Total interest income	17,222	17,947	52,322	54,780
Interest expense	'	'	'	'
Total interest expense	-13,484	-13,564	-41,416	-41,735
Expense related to derivatives	-75	-107	-230	-360
Net interest income	3,663	4,276	10,676	12,685
(Provision) benefit for credit losses	-574	1,138	-41	2,264
Net interest income after (provision) benefit for credit losses	3,089	5,414	10,635	14,949
Non-interest income (loss)	'	'	'	'
Gains (losses) on extinguishment of debt securities of consolidated trusts and other debt	'	'	-308	333
Derivative gains (losses)	-617	-74	-4,894	1,663
Impairment of available-for-sale securities:	'	'	'	'
Total other-than-temporary impairment of available-for-sale securities	-132	-130	-641	-169
Portion of other-than-temporary impairment recognized in AOCI	-34	4	-46	-44
Net impairment of available-for-sale securities recognized in earnings	-166	-126	-687	-213
Other gains (losses) on investment securities recognized in earnings	-109	620	1,029	-153
Other income (loss)	1,796	991	7,329	1,139
Non-interest income (loss)	764	1,689	2,469	2,769
Non-interest expense	'	'	'	'
Salaries and employee benefits	-231	-207	-687	-626
Professional services	-128	-144	-392	-387
Occupancy expense	-16	-14	-43	-41
Other administrative expenses	-97	-90	-271	-277
Total administrative expenses	-472	-455	-1,393	-1,331
Real estate owned operations (expense) income	-103	79	-112	183
Temporary Payroll Tax Cut Continuation Act of 2011 expense	-198	-150	-563	-366
Other expenses	-43	-51	-199	-185
Non-interest expense	-816	-577	-2,267	-1,699
Income before income tax (expense) benefit	3,037	6,526	10,837	16,019
Income tax (expense) benefit	-956	23,960	-3,374	24,036
Net income	2,081	30,486	7,463	40,055
Other comprehensive income (loss), net of taxes and reclassification adjustments:	'	'	'	'
Changes in unrealized gains (losses) related to available-for-sale securities	656	-127	1,562	1,436
Changes in unrealized gains (losses) related to cash flow hedge relationships	50	76	151	250
Changes in defined benefit plans	-1	2	-1	24
Total other comprehensive income (loss), net of taxes and reclassification adjustments	705	-49	1,712	1,710
Comprehensive income	2,786	30,437	9,175	41,765
Net income	2,081	30,486	7,463	40,055
Undistributed net worth sweep and senior preferred stock dividends	-2,786	-30,436	-9,175	-41,764
Net income (loss) attributable to common stockholders	-705	50	-1,712	-1,709
Net income (loss) per common share — basic and diluted	($0.22)	$0.02	($0.53)	($0.53)
Weighted average common shares outstanding (in millions) — basic and diluted	3,236	3,238	3,236	3,238
Variable Interest Entity Primary Beneficiary	'	'	'	'
Interest income	'	'	'	'
Total mortgage loans	14,148	14,197	42,881	42,798
Interest expense	'	'	'	'
Total interest expense	-11,802	-11,523	-36,150	-35,262
Non-interest income (loss)	'	'	'	'
Gains (losses) on extinguishment of debt securities of consolidated trusts and other debt	-132	135	-308	197
Freddie Mac parent	'	'	'	'
Interest income	'	'	'	'
Total mortgage loans	1,643	1,872	4,965	5,898
Interest expense	'	'	'	'
Interest expense, short-term debt	-35	-45	-110	-134
Interest expense, long-term debt	-1,647	-1,996	-5,156	-6,339
Non-interest income (loss)	'	'	'	'
Gains (losses) on extinguishment of debt securities of consolidated trusts and other debt	($8)	$143	$0	$136

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets	'	'
Cash and cash equivalents (includes $1 and $1, respectively, related to our consolidated VIEs)	$16,191	$11,281
Restricted cash and cash equivalents (includes $6,177 and $12,193, respectively, related to our consolidated VIEs)	6,264	12,265
Federal funds sold and securities purchased under agreements to resell (includes $12,375 and $3,150, respectively, related to our consolidated VIEs)	29,956	62,383
Investments in securities:	'	'
Available-for-sale, at fair value (includes $0 and $70, respectively, pledged as collateral that may be repledged)	112,777	128,919
Trading, at fair value (includes $1,393 and $365, respectively, pledged as collateral that may be repledged)	30,434	23,404
Total investments in securities	143,211	152,323
Held-for-investment, at amortized cost:	'	'
Total held-for-investment mortgage loans, net	1,683,252	1,676,063
Held-for-sale, at lower-of-cost-or-fair-value (includes $7,719 and $8,727 at fair value, respectively)	7,719	8,727
Total mortgage loans, net	1,690,971	1,684,790
Accrued interest receivable (includes $5,121 and $5,111, respectively, related to our consolidated VIEs)	6,039	6,150
Derivative assets, net	897	1,063
Real estate owned, net (includes $41 and $49, respectively, related to our consolidated VIEs)	2,911	4,551
Deferred tax assets, net	18,481	22,716
Other assets (Note 19) (includes $1,835 and $2,172, respectively, related to our consolidated VIEs)	7,863	8,539
Total assets	1,922,784	1,966,061
Liabilities	'	'
Accrued interest payable (includes $4,716 and $4,702, respectively, related to our consolidated VIEs)	6,217	6,803
Debt, net:	'	'
Total debt, net	1,903,551	1,940,751
Derivative liabilities, net	1,930	180
Other liabilities (Note 19) (includes $3 and $6, respectively, related to our consolidated VIEs)	5,900	5,492
Total liabilities	1,917,598	1,953,226
Commitments and contingencies (Notes 9, 14, and 17)	'	'
Equity	'	'
Senior preferred stock, at redemption value	72,336	72,336
Preferred stock, at redemption value	14,109	14,109
Common stock, $0.00 par value, 4,000,000,000 shares authorized, 725,863,886 shares issued and 650,040,391 shares and 650,039,533 shares outstanding, respectively	0	0
Additional paid-in capital	0	0
Retained earnings (accumulated deficit)	-79,080	-69,719
AOCI, net of taxes, related to:	'	'
Available-for-sale securities (includes $708 and ($1,100), respectively, related to net unrealized gains (losses) on securities for which other-than-temporary impairment has been recognized in earnings)	2,524	962
Cash flow hedge relationships	-849	-1,000
Defined benefit plans	31	32
Total AOCI, net of taxes	1,706	-6
Treasury stock, at cost, 75,823,495 shares and 75,824,353 shares, respectively	-3,885	-3,885
Total equity (See NOTE 11: STOCKHOLDERS’ EQUITY for information on our dividend obligation to Treasury)	5,186	12,835
Total liabilities and equity	1,922,784	1,966,061
Variable Interest Entity Primary Beneficiary	'	'
Assets	'	'
Cash and cash equivalents (includes $1 and $1, respectively, related to our consolidated VIEs)	1	1
Restricted cash and cash equivalents (includes $6,177 and $12,193, respectively, related to our consolidated VIEs)	6,177	12,193
Federal funds sold and securities purchased under agreements to resell (includes $12,375 and $3,150, respectively, related to our consolidated VIEs)	12,375	3,150
Held-for-investment, at amortized cost:	'	'
Total held-for-investment mortgage loans, net	1,549,533	1,529,905
Held-for-sale, at lower-of-cost-or-fair-value (includes $7,719 and $8,727 at fair value, respectively)	0	0
Total mortgage loans, net	1,549,533	1,529,905
Accrued interest receivable (includes $5,121 and $5,111, respectively, related to our consolidated VIEs)	5,121	5,111
Real estate owned, net (includes $41 and $49, respectively, related to our consolidated VIEs)	41	49
Other assets (Note 19) (includes $1,835 and $2,172, respectively, related to our consolidated VIEs)	1,835	2,172
Liabilities	'	'
Accrued interest payable (includes $4,716 and $4,702, respectively, related to our consolidated VIEs)	4,716	4,702
Debt, net:	'	'
Total debt, net	1,467,845	1,433,984
Other liabilities (Note 19) (includes $3 and $6, respectively, related to our consolidated VIEs)	3	6
Freddie Mac parent	'	'
Held-for-investment, at amortized cost:	'	'
Total held-for-investment mortgage loans, net	133,719	146,158
Held-for-sale, at lower-of-cost-or-fair-value (includes $7,719 and $8,727 at fair value, respectively)	7,719	8,727
Total mortgage loans, net	141,438	154,885
Debt, net:	'	'
Total debt, net	$435,706	$506,767

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Assets	'	'
Cash and cash equivalents related to consolidated VIEs	$16,191	$11,281
Restricted cash and cash equivalents related to consolidated VIEs	6,264	12,265
Federal funds sold and securities purchased under agreements to resell related to consolidated VIEs	29,956	62,383
Investments in securities:	'	'
Available-for-sale securities pledged as collateral that may be repledged	0	70
Trading securities pledged as collateral that may be repledged	1,393	365
Mortgage loans:	'	'
Allowance for loan losses, held-for-investment mortgage loans	22,574	24,618
Mortgage loans, held for sale, at fair value	7,719	8,727
Accrued interest receivable related to consolidated VIEs	6,039	6,150
Real estate owned, net related to consolidated VIEs	2,911	4,551
Other assets related to consolidated VIEs	7,863	8,539
Liabilities	'	'
Accrued interest payable related to consolidated VIEs	6,217	6,803
Other liabilities related to consolidated VIEs	5,900	5,492
Equity	'	'
Common stock, par value	'	'
Common stock, shares authorized	4,000,000,000	4,000,000,000
Common stock, shares issued	725,863,886	725,863,886
Common stock, shares outstanding	650,040,391	650,039,533
AOCI, net of taxes, related to:	'	'
Available for sale securities other-than-temporary impairment adjustment, related to net unrealized gains(losses) on securities for which other-than-temporary impairment has been recognized in earnings	708	-1,100
Treasury stock, shares	75,823,495	75,824,353
Variable Interest Entity Primary Beneficiary	'	'
Assets	'	'
Cash and cash equivalents related to consolidated VIEs	1	1
Restricted cash and cash equivalents related to consolidated VIEs	6,177	12,193
Federal funds sold and securities purchased under agreements to resell related to consolidated VIEs	12,375	3,150
Mortgage loans:	'	'
Allowance for loan losses, held-for-investment mortgage loans	3,101	3,006
Accrued interest receivable related to consolidated VIEs	5,121	5,111
Real estate owned, net related to consolidated VIEs	41	49
Other assets related to consolidated VIEs	1,835	2,172
Liabilities	'	'
Accrued interest payable related to consolidated VIEs	4,716	4,702
Debt securities recorded at fair value	45	59
Other liabilities related to consolidated VIEs	3	6
Freddie Mac parent	'	'
Mortgage loans:	'	'
Allowance for loan losses, held-for-investment mortgage loans	19,473	21,612
Liabilities	'	'
Debt securities recorded at fair value	$4,988	$2,683

Consolidated_Statements_of_Equ

Consolidated Statements of Equity (USD $)	Total	Senior Preferred Stock, at Redemption Value	Preferred Stock, at Redemption Value	Common Stock, at Par Value	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	AOCI, Net of Tax	Treasury Stock, at Cost
In Millions, unless otherwise specified
Beginning balance at Dec. 31, 2012	$8,827	$72,336	$14,109	$0	$1	($70,796)	($2,938)	($3,885)
Beginning balance, Shares at Dec. 31, 2012	'	1	464	650	'	'	'	'
Comprehensive income:	'	'	'	'	'	'	'	'
Net income	40,055	'	'	'	'	40,055	'	'
Other comprehensive income, net of taxes	1,710	'	'	'	'	'	1,710	'
Comprehensive income	41,765	'	'	'	'	40,055	1,710	'
Common stock issuances	-1	'	'	'	-1	'	'	'
Senior Preferred Stock Dividends Declared	-17,155	'	'	'	'	-17,155	'	'
Ending balance at Sep. 30, 2013	33,436	72,336	14,109	0	0	-47,896	-1,228	-3,885
Ending balance, Shares at Sep. 30, 2013	'	1	464	650	'	'	'	'
Beginning balance at Dec. 31, 2013	12,835	72,336	14,109	0	0	-69,719	-6	-3,885
Beginning balance, Shares at Dec. 31, 2013	'	1	464	650	'	'	'	'
Comprehensive income:	'	'	'	'	'	'	'	'
Net income	7,463	'	'	'	'	7,463	'	'
Other comprehensive income, net of taxes	1,712	'	'	'	'	'	1,712	'
Comprehensive income	9,175	'	'	'	'	7,463	1,712	'
Senior Preferred Stock Dividends Declared	-16,824	'	'	'	'	-16,824	'	'
Ending balance at Sep. 30, 2014	$5,186	$72,336	$14,109	$0	$0	($79,080)	$1,706	($3,885)
Ending balance, Shares at Sep. 30, 2014	'	1	464	650	'	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities	'	'
Net income	$7,463	$40,055
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Derivative losses (gains)	2,910	-4,408
Asset related amortization — premiums, discounts, and basis adjustments	2,454	3,939
Debt related amortization — premiums and discounts on certain debt securities and basis adjustments	-3,799	-5,638
Losses (gains) on extinguishment of debt securities of consolidated trusts and other debt	308	-333
Provision (benefit) for credit losses	41	-2,264
(Gains) losses on investment activity	-725	806
Deferred income tax expense (benefit)	3,313	-24,041
Purchases of held-for-sale mortgage loans	-11,875	-17,695
Sales of mortgage loans acquired as held-for-sale	13,350	20,866
Repayments of mortgage loans acquired as held-for-sale	60	147
Payments to servicers for pre-foreclosure expense and servicer incentive fees	-723	-974
Change in:	'	'
Accrued interest receivable	111	535
Accrued interest payable	-565	-1,149
Income taxes receivable	-698	5
Other, net	-311	-1,597
Net cash provided by operating activities	11,314	8,254
Cash flows from investing activities	'	'
Purchases of trading securities	-33,076	-48,608
Proceeds from sales of trading securities	13,674	30,319
Proceeds from maturities of trading securities	13,490	5,558
Purchases of available-for-sale securities	-22,080	-6,363
Proceeds from sales of available-for-sale securities	26,608	15,586
Proceeds from maturities of available-for-sale securities	15,742	27,348
Purchases of held-for-investment mortgage loans	-51,583	-66,848
Repayments of mortgage loans acquired as held-for-investment	175,728	346,931
Proceeds from sales of mortgage loans acquired as held-for-investment	454	7
Decrease in restricted cash	6,001	8,837
Advances to lenders	-67	0
Net proceeds from dispositions of real estate owned and other recoveries	6,357	8,231
Net decrease (increase) in federal funds sold and securities purchased under agreements to resell	32,427	-3,460
Derivative premiums and terminations and swap collateral, net	-1,262	4,545
Net cash provided by investing activities	182,413	322,083
Cash flows from financing activities	'	'
Payment of cash dividends on senior preferred stock	-16,824	-17,155
Payments of low-income housing tax credit partnerships notes payable	-5	-6
Net cash used in financing activities	-188,817	-329,318
Net increase in cash and cash equivalents	4,910	1,019
Cash and cash equivalents at beginning of period	11,281	8,513
Cash and cash equivalents at end of period	16,191	9,532
Cash paid for:	'	'
Debt interest	46,697	50,519
Net cash settlement on interest rate swaps	1,897	2,775
Income taxes	760	0
Non-cash investing and financing activities:	'	'
Underlying mortgage loans related to guarantor swap transactions	137,071	289,416
Debt securities of consolidated trusts held by third parties established for guarantor swap transactions	137,071	289,416
Net increase (decrease) in investment securities and debt securities of consolidated trusts held by third parties from the deconsolidation and/or consolidation of variable interest entities	5	-2,180
Investment securities received (transferred) as consideration for the issuance (extinguishment) of debt securities of consolidated trusts	1,184	0
Transfers from held-for-investment mortgage loans to held-for-sale mortgage loans	864	17
Transfers from held-for-sale mortgage loans to held-for-investment mortgage loans	231	0
Parent Company [Member]	'	'
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Losses (gains) on extinguishment of debt securities of consolidated trusts and other debt	0	-136
Cash flows from financing activities	'	'
Proceeds from issuance of debt	342,957	525,453
Repayments of debt	-414,285	-557,573
Variable Interest Entity Primary Beneficiary Member	'	'
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Losses (gains) on extinguishment of debt securities of consolidated trusts and other debt	308	-197
Cash flows from financing activities	'	'
Proceeds from issuance of debt	93,823	87,874
Repayments of debt	-194,483	-367,911
Cash and cash equivalents at beginning of period	1	'
Cash and cash equivalents at end of period	$1	'

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	'
	NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Freddie Mac is a GSE chartered by Congress in 1970 with a public mission to provide liquidity, stability, and affordability to the U.S. housing market. We are regulated by FHFA, the SEC, HUD, and Treasury, and are currently operating under the conservatorship of FHFA. For more information on the roles of FHFA and Treasury, see “NOTE 2: CONSERVATORSHIP AND RELATED MATTERS” in this Form 10-Q and in our Annual Report on Form 10-K for the year ended December 31, 2013, or our 2013 Annual Report.
	We are involved in the U.S. housing market by participating in the secondary mortgage market. We do not participate directly in the primary mortgage market. Our participation in the secondary mortgage market includes providing our credit guarantee for mortgages originated by mortgage lenders in the primary mortgage market and investing in mortgage loans and mortgage-related securities.
	Our operations consist of three reportable segments, which are based on the type of business activities each performs — Single-family Guarantee, Investments, and Multifamily. Our Single-family Guarantee segment reflects results from our single-family credit guarantee activities. In our Single-family Guarantee segment, we purchase and guarantee single-family mortgage loans originated by our seller/servicers in the primary mortgage market. In most instances, we use the mortgage securitization process to package the loans into guaranteed mortgage-related securities. We guarantee the payment of principal and interest on the mortgage-related securities in exchange for management and guarantee fees. Our Investments segment reflects results from three primary activities: (a) managing the company’s mortgage-related investments portfolio, excluding Multifamily segment investments; (b) managing the treasury function, including funding and liquidity, for the overall company; and (c) managing interest-rate risk for the overall company. In our Investments segment, we invest principally in mortgage-related securities and single-family performing mortgage loans. Our Multifamily segment reflects results from our investment (both purchases and sales), securitization, and guarantee activities in multifamily mortgage loans and securities. In our Multifamily segment, our primary business model is to purchase multifamily mortgage loans for aggregation and then securitization through issuance of multifamily K Certificates. See “NOTE 13: SEGMENT REPORTING” in our 2013 Annual Report for additional information.
	We are focused on the following primary business objectives: (a) reducing taxpayer exposure to losses by reducing and managing our overall risk profile, especially to mortgage-related risks; (b) supporting U.S. homeowners and renters by providing lenders with a constant source of liquidity for mortgage products even when other sources of financing are scarce; (c) building a commercially strong and efficient business enterprise; and (d) positioning the company, in particular our people and infrastructure, to succeed in a to-be-determined "future state." For information regarding our objectives, see “NOTE 2: CONSERVATORSHIP AND RELATED MATTERS — Business Objectives” in our 2013 Annual Report.
	Throughout our consolidated financial statements and related notes, we use certain acronyms and terms which are defined in the “GLOSSARY.”
	Basis of Presentation
	The accompanying unaudited consolidated financial statements have been prepared in accordance with GAAP for interim financial information and include our accounts as well as the accounts of other entities in which we have a controlling financial interest. All intercompany balances and transactions have been eliminated. These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes in our 2013 Annual Report. We are operating under the basis that we will realize assets and satisfy liabilities in the normal course of business as a going concern and in accordance with the delegation of authority from FHFA to our Board of Directors and management. Certain financial statement information that is normally included in annual financial statements prepared in conformity with GAAP, but is not required for interim reporting purposes, has been condensed or omitted. Certain amounts in prior periods’ consolidated financial statements have been reclassified to conform to the current presentation. In the opinion of management, all adjustments, which include only normal recurring adjustments, have been recorded for a fair presentation of our unaudited consolidated financial statements.
	Beginning in the first quarter of 2014, we reclassified net discounts paid on retirements of other debt and net premiums received from issuance of debt securities of consolidated trusts and other debt from cash flows from operating activities to cash flows from financing activities on our consolidated statements of cash flows. This reclassification resulted in a decrease of $1.1 billion to net cash provided by operating activities and an increase of $1.1 billion to net cash used in financing activities for the nine months ended September 30, 2013.
	Use of Estimates
	The preparation of financial statements requires us to make estimates and assumptions that affect: (a) the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements; and (b) the reported amounts of revenues and expenses and gains and losses during the reporting period. Management has made significant estimates in preparing the financial statements, including, but not limited to, establishing the allowance for loan losses and reserve for guarantee losses, valuing financial instruments and other assets and liabilities, assessing impairments on investments, and assessing our ability to realize net deferred tax assets. Actual results could be different from these estimates.
	Earnings Per Common Share
	The August 2012 amendment to the Purchase Agreement changed the manner in which the dividend on the senior preferred stock is determined. For each quarter from January 1, 2013 through and including December 31, 2017, the dividend payment will be the amount, if any, by which our Net Worth Amount at the end of the immediately preceding fiscal quarter, less the applicable Capital Reserve Amount, exceeds zero. See "NOTE 11: STOCKHOLDERS' EQUITY — Senior Preferred Stock" for additional information regarding the Capital Reserve Amount. For each quarter beginning January 1, 2018, the dividend payment will be the amount, if any, by which our Net Worth Amount at the end of the immediately preceding fiscal quarter exceeds zero. The dividend is presented in the period in which it is determinable for the senior preferred stock as a reduction to net income (loss) available to common stockholders and net income (loss) per common share. The dividend is declared and paid in the following period and recorded as a reduction to equity in the period declared.
	Because we have issued participating securities, we use the “two-class” method of computing earnings per common share. Basic earnings per common share is computed as net income attributable to common stockholders divided by the weighted average common shares outstanding for the period. The weighted average common shares outstanding for the period includes the weighted average number of shares that are associated with the warrant for our common stock issued to Treasury pursuant to the Purchase Agreement. This warrant is included since it is unconditionally exercisable by the holder at a minimal cost. See “NOTE 2: CONSERVATORSHIP AND RELATED MATTERS” in our 2013 Annual Report for further information.
	Diluted earnings per common share is computed as net income attributable to common stockholders divided by the weighted average common shares outstanding during the period adjusted for the dilutive effect of common equivalent shares outstanding. For periods with net income attributable to common stockholders, the calculation includes the effect of the weighted average shares related to stock options if the average market price during the period exceeds the exercise price. During periods in which a net loss attributable to common stockholders has been incurred, potential common equivalent shares outstanding are not included in the calculation because it would have an antidilutive effect. See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Earnings Per Common Share” in our 2013 Annual Report for further discussion of our significant accounting policies regarding our calculation of earnings per common share and “NOTE 11: STOCKHOLDERS’ EQUITY — Stock-Based Compensation” in this Form 10-Q for additional information on our earnings-per-share calculation.
	Recently Adopted Accounting Guidance
	Accounting for Investments in Qualified Affordable Housing Projects
	In the first quarter of 2014, we adopted an amendment to the accounting guidance related to accounting for investments in qualified affordable housing projects. This amendment permitted entities to elect to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions were met. The adoption of this amendment did not have a material impact on our consolidated financial statements.
	Recently Issued Accounting Guidance, Not Yet Adopted Within These Consolidated Financial Statements
	Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share Is More Akin to Debt or to Equity
	In November 2014, the FASB issued an amendment to the accounting guidance on derivatives and hedging related to evaluating host contracts in hybrid financial instruments that are issued in the form of a share. This accounting guidance clarifies that an entity should determine the nature of the host contract by considering all stated and implied substantive terms and features of the hybrid financial instrument, weighing each term and feature on the basis of relevant facts and circumstances. This accounting guidance is effective for interim and annual periods beginning after December 15, 2015. We do not expect that the adoption of this amendment will have a material impact on our consolidated financial statements.
	Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure
	In August 2014, the FASB issued an amendment to the accounting guidance for receivables related to certain government-guaranteed mortgage loans. This accounting guidance requires that a mortgage loan be de-recognized and a separate receivable be recognized upon foreclosure if certain conditions are met. If those conditions are met and such a receivable is recognized, the receivable should be measured based on the amount of principal and interest related to the loan expected to be recovered from the guarantor. This accounting guidance is effective for interim and annual periods beginning after December 15, 2014. We do not expect that the adoption of this amendment will have a material impact on our consolidated financial statements.
	Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures
	In June 2014, the FASB issued an amendment to the accounting guidance for transfers and servicing related to repurchase agreements and other similar transactions. This accounting guidance requires repurchase-to-maturity transactions to be accounted for as secured borrowings and requires separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty. This accounting guidance is effective for interim and annual periods beginning after December 15, 2014. We are evaluating the impact that the adoption of this amendment will have on our consolidated financial statements.
	Revenue from Contracts with Customers
	In May 2014, the FASB issued an amendment to the accounting guidance related to the recognition of revenue. This accounting guidance requires entities to recognize revenue to depict the transfer of promised goods or services to customers in amounts that reflect the consideration to which the entity expects to be entitled in exchange for those goods or services. This accounting guidance is effective for interim and annual periods beginning after December 15, 2016. We are evaluating the impact that the adoption of this amendment will have on our consolidated financial statements.
	Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure
	In January 2014, the FASB issued an amendment to the accounting guidance related to reclassifying residential real estate collateralized consumer mortgage loans upon foreclosure. This amendment clarifies that a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either: (a) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure; or (b) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. This amendment is effective for interim and annual periods beginning after December 15, 2014. We do not expect that the adoption of this amendment will have a material impact on our consolidated financial statements.

Conservatorship_and_Related_Ma

Conservatorship and Related Matters	9 Months Ended
	Sep. 30, 2014
Conservatorship and Related Matters [Abstract]	'
CONSERVATORSHIP AND RELATED MATTERS	'
	NOTE 2: CONSERVATORSHIP AND RELATED MATTERS
	Business Objectives
	We continue to operate under the conservatorship that commenced on September 6, 2008, conducting our business under the direction of FHFA, as our Conservator. The conservatorship and related matters have had a wide-ranging impact on us, including our management, business, financial condition and results of operations. Upon its appointment, FHFA, as Conservator, immediately succeeded to all rights, titles, powers and privileges of Freddie Mac, and of any stockholder, officer or director thereof, with respect to the company and its assets. The Conservator also succeeded to the title to all books, records, and assets of Freddie Mac held by any other legal custodian or third party. During the conservatorship, the Conservator has delegated certain authority to the Board of Directors to oversee, and management to conduct, business operations so that the company can continue to operate in the ordinary course. The directors serve on behalf of, and exercise authority as directed by, the Conservator.
	We are also subject to certain constraints on our business activities imposed by Treasury due to the terms of, and Treasury’s rights under, the Purchase Agreement. However, we believe that the support provided by Treasury pursuant to the Purchase Agreement currently enables us to maintain our access to the debt markets and to have adequate liquidity to conduct our normal business activities, although the costs of our debt funding could vary. Our ability to access funds from Treasury under the Purchase Agreement is critical to keeping us solvent.
	Our current business objectives reflect direction we have received from the Conservator (including the 2014 Conservatorship Scorecard). At the direction of the Conservator, we have made changes to certain business practices that are designed to provide support for the mortgage market in a manner that serves our public mission and other non-financial objectives but may not contribute to our profitability. Certain of these objectives are intended to help homeowners and the mortgage market and may help to mitigate future credit losses. However, some of our initiatives are expected to have an adverse impact on our near- and long-term financial results. Given the important role the Administration and our Conservator have placed on Freddie Mac in addressing housing and mortgage market conditions and our public mission, we may be required to take additional actions that could have a negative impact on our business, operating results or financial condition.
	The Conservator also stated that it is focusing on retaining value in the business operations of Freddie Mac and Fannie Mae, overseeing remediation of identified weaknesses in corporate operations and risk management, and ensuring that sound corporate governance principles are followed.
	On May 13, 2014, FHFA issued its 2014 Strategic Plan and the 2014 Conservatorship Scorecard. The 2014 Strategic Plan provides an updated vision for FHFA’s implementation of its obligations as conservator of Freddie Mac and Fannie Mae (the “Enterprises”). The 2014 Conservatorship Scorecard establishes objectives and performance targets and measures for 2014 for the Enterprises related to the strategic goals set forth in the 2014 Strategic Plan.
	The 2014 Strategic Plan establishes three reformulated strategic goals for the conservatorships of Freddie Mac and Fannie Mae:
	•	Maintain, in a safe and sound manner, foreclosure prevention activities and credit availability for new and refinanced mortgages to foster liquid, efficient, competitive and resilient national housing finance markets.
	•	Reduce taxpayer risk through increasing the role of private capital in the mortgage market.
	•	Build a new single-family securitization infrastructure for use by the Enterprises and adaptable for use by other participants in the secondary market in the future.
	As part of the first goal, the 2014 Strategic Plan describes various steps related to increasing access to mortgage credit for credit-worthy borrowers. These steps include FHFA evaluating and, when appropriate, implementing changes to the Enterprises’ representation and warranty framework designed to provide lenders with greater certainty regarding their origination and servicing obligations. The 2014 Strategic Plan also provides for the Enterprises to refine and improve their foreclosure prevention and servicing initiatives for distressed borrowers and communities. The 2014 Strategic Plan provides for the Enterprises to continue to play an ongoing role in supporting multifamily housing needs, particularly for low-income households. The plan states that FHFA will continue to impose a production cap on Freddie Mac’s and Fannie Mae’s multifamily businesses, but one that does not require contracting their multifamily business.
	FHFA stated that the second (“reduce”) goal builds upon and reformulates the “contract” goal used in the 2012 Strategic Plan. The reformulated goal no longer involves specific steps to contract the Enterprises’ market presence, but instead focuses on ways to shift risk to private market participants and away from the Enterprises in a responsible way that does not reduce liquidity or adversely impact the availability of mortgage credit. The second goal provides for us to increase the use of single-family credit risk transfer transactions (e.g., STACR debt note transactions). The 2014 Strategic Plan also provides for us to continue using credit risk transfer transactions in the multifamily business and to continue shrinking our mortgage-related investments portfolio consistent with the requirements in the Purchase Agreement, with a focus on selling less liquid assets. The second goal also describes steps to strengthen counterparty standards for mortgage insurers.
	The third goal includes the continued development of the Common Securitization Platform. In the 2014 Strategic Plan, FHFA refined the scope of this project to focus on making the new shared system operational for Freddie Mac’s and Fannie Mae’s existing single-family securitization activities. The third goal provides for the Enterprises to work towards the development of a single (common) security. The third goal also includes steps to continue to develop and implement mortgage data standards for the Enterprises and other market participants.
	We continue to align our resources and internal business plans to meet the goals and objectives provided to us by FHFA.
	As a result of the net worth sweep dividend provisions of the senior preferred stock, we cannot over the long term build and retain capital from the earnings generated by our business operations, or return capital to stockholders other than Treasury. There is significant uncertainty as to our future, as the conservatorship has no specified termination date, and it is unknown what changes may occur to our business model during or following conservatorship, including whether we will continue to exist. We are not aware of any current plans of our Conservator to significantly change our business model or capital structure in the near term. Our future structure and role will be determined by the Administration and Congress, and there are likely to be significant changes beyond the near term. We have no ability to predict the outcome of these deliberations.
	Impact of Conservatorship and Related Developments on the Mortgage-Related Investments Portfolio
	The UPB of our mortgage-related investments portfolio, for purposes of the limit imposed by the Purchase Agreement, as amended on August 17, 2012, and FHFA regulation, may not exceed $470 billion at December 31, 2014 and was $414 billion at September 30, 2014. The annual 15% reduction in our mortgage-related investments portfolio cap until it reaches $250 billion is calculated based on the maximum allowable size of the mortgage-related investments portfolio, rather than the actual UPB of the mortgage-related investments portfolio, as of December 31 of the preceding year. Our ability to acquire and sell mortgage assets is significantly constrained by limitations of the Purchase Agreement and those imposed by FHFA.
	Government Support for our Business
	We receive substantial support from Treasury and FHFA, as our Conservator and regulator, and are dependent upon their continued support in order to continue operating our business. This support includes our ability to access funds from Treasury under the Purchase Agreement, which is critical to: (a) keeping us solvent; (b) allowing us to focus on our primary business objectives under conservatorship; and (c) avoiding the appointment of a receiver by FHFA under statutory mandatory receivership provisions. At June 30, 2014, our assets exceeded our liabilities under GAAP; therefore FHFA did not request a draw on our behalf and, as a result, we did not receive any funding from Treasury under the Purchase Agreement during the three months ended September 30, 2014. Since conservatorship began through September 30, 2014, we have paid cash dividends of $88.2 billion to Treasury at the direction of the Conservator.
	At September 30, 2014, our assets exceeded our liabilities under GAAP; therefore no draw is being requested from Treasury under the Purchase Agreement for the third quarter of 2014.
	See "NOTE 2: CONSERVATORSHIP AND RELATED MATTERS," “NOTE 8: DEBT SECURITIES AND SUBORDINATED BORROWINGS” and “NOTE 11: STOCKHOLDERS’ EQUITY (DEFICIT)” in our 2013 Annual Report for more information on the conservatorship and the Purchase Agreement.

Variable_Interest_Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
VARIABLE INTEREST ENTITIES	'
	NOTE 3: VARIABLE INTEREST ENTITIES
	We have interests in various entities that are considered to be VIEs, including securitization trusts we use in our securities issuance process. We are required to evaluate VIEs at inception and on an ongoing basis. When we determine that we are the primary beneficiary of a VIE, we consolidate the assets and liabilities of the trust on our balance sheets. See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Consolidation and Equity Method of Accounting” and “NOTE 3: VARIABLE INTEREST ENTITIES” in our 2013 Annual Report for more information about VIEs.
	VIEs for which We are the Primary Beneficiary
	Based on our evaluation of whether we hold a controlling financial interest in these VIEs, we determined that we are the primary beneficiary of trusts that issue our single-family PCs and certain Other Guarantee Transactions. Therefore, we consolidate on our balance sheets the assets and liabilities of these trusts. At both September 30, 2014 and December 31, 2013, we were the primary beneficiary of, and therefore consolidated, single-family PC trusts with assets totaling $1.5 trillion as measured using the UPB of issued PCs. In addition, we concluded that we are the primary beneficiary of Other Guarantee Transactions with underlying assets totaling $7.4 billion and $8.9 billion at September 30, 2014 and December 31, 2013, respectively.
	VIEs for which We are not the Primary Beneficiary
	Our involvement with VIEs for which we are not the primary beneficiary generally takes one of two forms (or both): (a) purchasing an investment in these entities; or (b) providing a guarantee to these entities.
	The table below presents the carrying amounts and classification of the assets and liabilities recorded on our consolidated balance sheets related to our variable interests in non-consolidated VIEs, as well as our maximum exposure to loss as a result of our involvement with these VIEs.
	Table 3.1 — Variable Interests in VIEs for which We are not the Primary Beneficiary
		30-Sep-14
		Mortgage-Related						Unsecuritized
		Security Trusts						Multifamily
		Freddie  Mac			Non-Freddie Mac			Loans (3)			Other(2)
		Securities(1)			Securities(2)
		(in millions)
	Assets and Liabilities Recorded on our Consolidated Balance Sheets
	Assets:
	Restricted cash and cash equivalents	$	12		$	—		$	10		$	66
	Investments in securities:
	Available-for-sale, at fair value	41,363			68,921			—			—
	Trading, at fair value	14,900			6,372			—			—
	Mortgage loans:
	Held-for-investment, unsecuritized	—			—			43,942			—
	Held-for-sale	—			—			7,719			—
	Accrued interest receivable	233			182			217			7
	Other assets	876			3			268			470
	Liabilities:
	Derivative liabilities, net	—			—			—			(32		)
	Other liabilities	(959		)	—			(18		)	(602		)
	Maximum Exposure to Loss	$	81,383		$	72,919		$	52,156		$	10,282
	Total Assets of Non-Consolidated VIEs(4)	$	95,740		$	395,650		$	94,567		$	22,619
		December 31, 2013
		Mortgage-Related						Unsecuritized
		Security Trusts						Multifamily
		Freddie Mac			Non-Freddie Mac			Loans(3)			Other(2)
		Securities(1)			Securities(2)
		(in millions)
	Assets and Liabilities Recorded on our Consolidated Balance Sheets
	Assets:
	Restricted cash and cash equivalents	$	6		$	—		$	8		$	58
	Investments in securities:
	Available-for-sale, at fair value	40,659			84,765			—			—
	Trading, at fair value	9,349			7,414			—			—
	Mortgage loans:
	Held-for-investment, unsecuritized	—			—			50,306			—
	Held-for-sale	—			—			8,727			—
	Accrued interest receivable	232			226			261			7
	Other assets	833			14			407			477
	Liabilities:
	Derivative liabilities, net	(3		)	—			—			(35		)
	Other liabilities	(875		)	(2		)	(12		)	(558		)
	Maximum Exposure to Loss	$	72,072		$	92,559		$	59,710		$	10,415
	Total Assets of Non-Consolidated VIEs(4)	$	84,731		$	506,699		$	105,120		$	23,707
	-1	Freddie Mac securities include our variable interests in single-family multiclass REMICs and Other Structured Securities, multifamily PCs, multifamily Other Structured Securities, and Other Guarantee Transactions that we do not consolidate. Our maximum exposure to loss includes guaranteed UPB of assets held by the non-consolidated VIEs related to multifamily PCs, multifamily Other Structured Securities, and Other Guarantee Transactions for which we record a guarantee asset (component of Other Assets) and guarantee obligation (component of Other Liabilities) on our consolidated balance sheets. Our maximum exposure to loss on Freddie Mac securities excludes investments in single-family multiclass REMICs and Other Structured Securities, because we already consolidate the collateral of these trusts on our consolidated balance sheets.
	-2	For our involvement with non-consolidated non-Freddie Mac security trusts, and certain other VIEs where we do not provide a guarantee, our maximum exposure to loss is computed as the carrying amount if the security is classified as trading or the amortized cost if the security is classified as available-for-sale for our investments and related assets recorded on our consolidated balance sheets. See “NOTE 7: INVESTMENTS IN SECURITIES” for additional information regarding our non-Freddie Mac securities.
	-3	For unsecuritized multifamily loans, our maximum exposure to loss includes accrued interest receivable associated with these loans. See “NOTE 4: MORTGAGE LOANS AND LOAN LOSS RESERVES” for additional information about our unsecuritized multifamily loans.
	-4	Except for unsecuritized multifamily loans, this represents the remaining UPB of assets held by non-consolidated VIEs using the most current information available. For unsecuritized multifamily loans, this represents the fair value of the property serving as collateral for the loan. We do not include the assets of our non-consolidated trusts related to single-family REMICs and Other Structured Securities backed by our PCs in this amount as we already consolidate the underlying collateral of these trusts on our consolidated balance sheets.

Mortgage_Loans_and_Loan_Loss_R

Mortgage Loans and Loan Loss Reserves	9 Months Ended
	Sep. 30, 2014
Mortgage Loans on Real Estate [Abstract]	'
MORTGAGE LOANS AND LOAN LOSS RESERVES	'
	NOTE 4: MORTGAGE LOANS AND LOAN LOSS RESERVES
	We own both single-family mortgage loans, which are secured by one to four unit residential properties, and multifamily mortgage loans, which are secured by properties with five or more residential rental units. Our single-family loans are predominately first lien, fixed-rate mortgages secured by the borrower’s primary residence. For a discussion of our significant accounting policies regarding our mortgage loans and loan loss reserves, see “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES” in our 2013 Annual Report.
	The table below summarizes the types of loans on our consolidated balance sheets as of September 30, 2014 and December 31, 2013.
	Table 4.1 — Mortgage Loans
		30-Sep-14									31-Dec-13
		Unsecuritized			Held By			Total			Unsecuritized			Held By			Total
					Consolidated									Consolidated
					Trusts									Trusts
		(in millions)
	Single-family:(1)
	Fixed-rate
	Amortizing	$	106,068		$	1,424,474		$	1,530,542		$	113,597		$	1,402,841		$	1,516,438
	Interest-only	1,031			3,607			4,638			1,476			4,826			6,302
	Total fixed-rate	107,099			1,428,081			1,535,180			115,073			1,407,667			1,522,740
	Adjustable-rate
	Amortizing	1,644			67,330			68,974			1,935			65,429			67,364
	Interest-only	3,522			21,054			24,576			4,576			23,841			28,417
	Total adjustable-rate	5,166			88,384			93,550			6,511			89,270			95,781
	Other Guarantee Transactions	—			7,366			7,366			—			8,431			8,431
	FHA/VA and other governmental	503			3,191			3,694			553			3,354			3,907
	Total single-family	112,768			1,527,022			1,639,790			122,137			1,508,722			1,630,859
	Multifamily:(1)
	Fixed-rate	44,038			525			44,563			50,701			444			51,145
	Adjustable-rate	7,613			—			7,613			8,467			—			8,467
	Other governmental	3			—			3			3			—			3
	Total multifamily	51,654			525			52,179			59,171			444			59,615
	Total UPB of mortgage loans	164,422			1,527,547			1,691,969			181,308			1,509,166			1,690,474
	Deferred fees, unamortized premiums, discounts and other cost basis adjustments	(3,615		)	25,087			21,472			(4,817		)	23,745			18,928
	Fair value adjustments on loans held-for sale(2)	104			—			104			6			—			6
	Allowance for loan losses on mortgage loans held-for-investment	(19,473		)	(3,101		)	(22,574		)	(21,612		)	(3,006		)	(24,618		)
	Total mortgage loans, net	$	141,438		$	1,549,533		$	1,690,971		$	154,885		$	1,529,905		$	1,684,790
	Mortgage loans, net:
	Held-for-investment	$	133,719		$	1,549,533		$	1,683,252		$	146,158		$	1,529,905		$	1,676,063
	Held-for-sale	7,719			—			7,719			8,727			—			8,727
	Total mortgage loans, net	$	141,438		$	1,549,533		$	1,690,971		$	154,885		$	1,529,905		$	1,684,790
	-1	Based on UPB.
	-2	Consists of fair value adjustments associated with multifamily mortgage loans (for which we have made a fair value election).
	During the three months ended September 30, 2014 and 2013, we purchased $75.8 billion and $94.6 billion, respectively, in UPB of single-family mortgage loans, and $0.3 billion during each of these periods in UPB of multifamily loans that were classified as held-for-investment. During the nine months ended September 30, 2014 and 2013, we purchased $182.2 billion and $351.2 billion, respectively, in UPB of single-family mortgage loans and $1.6 billion and $0.7 billion, respectively, in UPB of multifamily loans that were classified as held-for-investment. Our sales of multifamily mortgage loans occur primarily through the issuance of multifamily K Certificates, which we categorize as Other Guarantee Transactions. During the three months ended September 30, 2014 and 2013, we sold $4.5 billion and $6.4 billion, respectively, of held-for-sale multifamily mortgage loans. During the nine months ended September 30, 2014 and 2013, we sold $12.9 billion and $20.8 billion, respectively, of held-for-sale multifamily mortgage loans. See “NOTE 14: FINANCIAL GUARANTEES” for more information on our issuances of Other Guarantee Transactions.
	In April 2014, we received FHFA's approval for a pilot transaction to sell certain seriously delinquent unsecuritized single-family loans held on our consolidated balance sheet. In connection with this transaction, during the second quarter of 2014, we reclassified $0.9 billion in recorded investment of mortgage loans from held-for-investment to held-for-sale. We subsequently reclassified certain of these loans back to held-for-investment during the second and third quarters of 2014. We completed the sale in the third quarter of 2014. We may pursue additional sales in the future, subject to FHFA approval. For additional information regarding fair value of our loans classified as held-for-sale, see "NOTE 16: FAIR VALUE DISCLOSURES."
	Credit Quality of Mortgage Loans
	We evaluate impairment for single-family loans using different criteria than the criteria we use to evaluate multifamily loans. The current LTV ratio is one key factor we consider when estimating our loan loss reserves for single-family loans. As estimated current LTV ratios increase, the borrower’s equity in the home decreases, which negatively affects the borrower’s ability to refinance (outside of HARP) or to sell the property for an amount at or above the balance of the outstanding mortgage loan. A second-lien mortgage also reduces the borrower’s equity in the home, and has a similar negative effect on the borrower’s ability to refinance or sell the property for an amount at or above the combined balances of the first and second mortgages. As of both September 30, 2014 and December 31, 2013, based on data collected by us at loan delivery, approximately 14% of loans in our single-family credit guarantee portfolio had second-lien financing by third parties at origination of the first mortgage. However, borrowers are free to obtain second-lien financing after origination, and we are not entitled to receive notification when a borrower does so. Therefore, it is likely that additional borrowers have post-origination second-lien mortgages. For further information about concentrations of risk associated with our single-family and multifamily mortgage loans, see “NOTE 15: CONCENTRATION OF CREDIT AND OTHER RISKS.”
	The table below presents information on the estimated current LTV ratios of single-family held-for-investment loans on our consolidated balance sheets. Our current LTV ratio estimates are based on available data through the end of each respective period presented.
	Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio
		As of September 30, 2014												As of December 31, 2013
		Estimated Current LTV Ratio(1)												Estimated Current LTV Ratio(1)
		≤ 80			> 80 to 100			> 100(2)			Total			≤ 80			> 80 to 100			> 100(2)			Total
		(in millions)
	Single-family loans:
	20 and 30-year or more, amortizing fixed-rate(3)	$	890,035		$	258,552		$	94,120		$	1,242,707		$	819,509		$	269,110		$	124,491		$	1,213,110
	15-year amortizing fixed-rate(3)	266,528			15,039			3,931			285,498			270,211			19,658			5,748			295,617
	Adjustable-rate(4)	59,173			6,641			871			66,685			56,208			6,714			1,578			64,500
	Alt-A, interest-only, and option ARM(5)	29,261			18,985			18,142			66,388			29,927			21,564			25,089			76,580
	Total single-family loans	$	1,244,997		$	299,217		$	117,064		1,661,278			$	1,175,855		$	317,046		$	156,906		1,649,807
	Multifamily loans										44,548												50,874
	Total recorded investment of held-for-investment loans										$	1,705,826											$	1,700,681
	-1	The current LTV ratios are management estimates, which are updated on a monthly basis. Current market values are estimated by adjusting the value of the property at origination based on changes in the market value of homes in the same geographic area since that time. The value of a property at origination is based on: (a) for purchase mortgages, either the lesser of the appraised value of the property at the time of mortgage origination or the mortgage borrower’s purchase price; or (b) for refinance mortgages, a third-party appraisal. Changes in market value are derived from our internal index which measures price changes for repeat sales and refinancing activity on the same properties using Freddie Mac and Fannie Mae single-family mortgage acquisitions, including foreclosure sales. Estimates of the current LTV ratio include the credit-enhanced portion of the loan and exclude any secondary financing by third parties. The existence of a second lien reduces the borrower’s equity in the property and, therefore, can increase the risk of default.
	-2	The serious delinquency rate for the total of single-family held-for-investment mortgage loans with estimated current LTV ratios in excess of 100% was 8.9% and 9.9% as of September 30, 2014 and December 31, 2013, respectively.
	-3	The majority of our loan modifications result in new terms that include fixed interest rates after modification. As of September 30, 2014 and December 31, 2013, we have categorized UPB of approximately $42.8 billion and $43.8 billion, respectively, of modified loans as fixed-rate loans (instead of as adjustable rate loans), even though the modified loans have rate adjustment provisions. In these cases, while the terms of the modified loans provide for the interest rate to adjust in the future, such future rates are determined at the time of modification rather than at a subsequent date.
	-4	Includes balloon/reset mortgage loans and excludes option ARMs.
	-5	We have discontinued our purchases of Alt-A, interest-only, and option ARM loans. For reporting purposes: (a) loans within the Alt-A category continue to be presented in that category following modification, even though the borrower may have provided full documentation of assets and income to complete the modification; and (b) loans within the option ARM category continue to be presented in that category following modification, even though the modified loan no longer provides for optional payment provisions.
	For information about the payment status of single-family and multifamily mortgage loans, including the amount of such loans we deem impaired, see “NOTE 5: IMPAIRED LOANS.” For a discussion of certain indicators of credit quality for the multifamily loans on our consolidated balance sheets, see “NOTE 15: CONCENTRATION OF CREDIT AND OTHER RISKS — Multifamily Mortgage Portfolio.”
	Allowance for Loan Losses and Reserve for Guarantee Losses, or Loan Loss Reserves
	Our loan loss reserves consist of our: (a) allowance for loan losses on mortgage loans that we classify as held-for-investment on our consolidated balance sheets; and (b) reserve for guarantee losses associated with Freddie Mac mortgage-related securities backed by multifamily loans, certain single-family Other Guarantee Transactions, and other guarantee commitments, for which we have incremental credit risk.
A significant portion of the unsecuritized single-family loans on our consolidated balance sheets are seriously delinquent and/or TDR loans that we previously removed from our PC pools. These seriously delinquent and TDR loans typically have a higher associated allowance for loan loss than loans that remain in consolidated trusts.
The table below presents our loan loss reserves activity for the single-family and multifamily loans that we own or guarantee.
Table 4.3 — Detail of Loan Loss Reserves
	Three Months Ended September 30,
	2014												2013
	Allowance for Loan Losses						Reserve  for						Allowance for Loan Losses						Reserve  for
							Guarantee												Guarantee
	Unsecuritized			Held By			Losses(1)			Total			Unsecuritized			Held By			Losses(1)			Total
				Consolidated												Consolidated
				Trusts												Trusts
	(dollars in millions)
Single-family:
Beginning balance	$	19,956		$	2,652		$	100		$	22,708		$	22,862		$	3,222		$	113		$	26,197
Provision (benefit) for credit losses	211			378			(5		)	584			(1,528		)	430			(12		)	(1,110		)
Charge-offs(2)	(1,014		)	(72		)	(2		)	(1,088		)	(1,917		)	(379		)	(2		)	(2,298		)
Recoveries(3)	184			6			—			190			1,470			260			—			1,730
Transfers, net(4)	55			137			—			192			1,064			(800		)	—			264
Ending balance	$	19,392		$	3,101		$	93		$	22,586		$	21,951		$	2,733		$	99		$	24,783
Multifamily:
Beginning balance	$	91		$	—		$	16		$	107		$	206		$	—		$	30		$	236
Provision (benefit) for credit losses	(11		)	—			1			(10		)	(26		)	—			(2		)	(28		)
Charge-offs(2)	—			—			—			—			(3		)	—			—			(3		)
Recoveries(3)	1			—			—			1			—			—			—			—
Ending balance	$	81		$	—		$	17		$	98		$	177		$	—		$	28		$	205
Total:
Beginning balance	$	20,047		$	2,652		$	116		$	22,815		$	23,068		$	3,222		$	143		$	26,433
Provision (benefit) for credit losses	200			378			(4		)	574			(1,554		)	430			(14		)	(1,138		)
Charge-offs(2)	(1,014		)	(72		)	(2		)	(1,088		)	(1,920		)	(379		)	(2		)	(2,301		)
Recoveries(3)	185			6			—			191			1,470			260			—			1,730
Transfers, net(4)	55			137			—			192			1,064			(800		)	—			264
Ending balance	$	19,473		$	3,101		$	110		$	22,684		$	22,128		$	2,733		$	127		$	24,988
Ratio of total loan loss reserves (excluding TDR concessions) to net charge-offs for single-family loans(5)										3.1												1.9
Ratio of total loan loss reserves to net charge-offs for single-family loans(6)										6.3												3.4
	Nine Months Ended September 30,
	2014												2013
	Allowance for Loan Losses						Reserve  for						Allowance for Loan Losses						Reserve  for
							Guarantee												Guarantee
	Unsecuritized			Held By			Losses(1)			Total			Unsecuritized			Held By			Losses(1)			Total
				Consolidated												Consolidated
				Trusts												Trusts
	(in millions)
Single-family:
Beginning balance	$	21,487		$	3,006		$	85		$	24,578		$	25,449		$	4,918		$	141		$	30,508
Provision (benefit) for credit losses	(665		)	745			13			93			(3,182		)	1,117			(32		)	(2,097		)
Charge-offs(2)	(3,464		)	(298		)	(5		)	(3,767		)	(6,594		)	(691		)	(7		)	(7,292		)
Recoveries(3)	848			252			—			1,100			2,597			319			—			2,916
Transfers, net(4)	1,186			(604		)	—			582			3,681			(2,930		)	(3		)	748
Ending balance	$	19,392		$	3,101		$	93		$	22,586		$	21,951		$	2,733		$	99		$	24,783
Multifamily:
Beginning balance	$	125		$	—		$	26		$	151		$	339		$	1		$	42		$	382
Provision (benefit) for credit losses	(43		)	—			(9		)	(52		)	(159		)	(1		)	(7		)	(167		)
Charge-offs(2)	(2		)	—			—			(2		)	(4		)	—			—			(4		)
Recoveries(3)	1			—			—			1			1			—			—			1
Transfers, net(4)	—			—			—			—			—			—			(7		)	(7		)
Ending balance	$	81		$	—		$	17		$	98		$	177		$	—		$	28		$	205
Total:
Beginning balance	$	21,612		$	3,006		$	111		$	24,729		$	25,788		$	4,919		$	183		$	30,890
Provision (benefit) for credit losses	(708		)	745			4			41			(3,341		)	1,116			(39		)	(2,264		)
Charge-offs(2)	(3,466		)	(298		)	(5		)	(3,769		)	(6,598		)	(691		)	(7		)	(7,296		)
Recoveries(3)	849			252			—			1,101			2,598			319			—			2,917
Transfers, net(4)	1,186			(604		)	—			582			3,681			(2,930		)	(10		)	741
Ending balance	$	19,473		$	3,101		$	110		$	22,684		$	22,128		$	2,733		$	127		$	24,988
-1	Loans associated with our reserve for guarantee losses are those loans that underlie our non-consolidated securitization trusts and other guarantee commitments and are evaluated for impairment on a collective basis. Our reserve for guarantee losses is included in other liabilities on our consolidated balance sheets.
-2	Charge-offs represent the amount of a loan that has been discharged to remove the loan from our consolidated balance sheet principally due to either foreclosure transfers or short sales. Charge-offs exclude $21 million and $63 million for the three months ended September 30, 2014 and 2013, respectively, and $59 million and $204 million for the nine months ended September 30, 2014 and 2013, respectively, related to: (a) amounts recorded as losses on loans purchased within other expenses on our consolidated statements of comprehensive income, which relate to certain loans purchased under financial guarantees; or (b) cumulative fair value losses recognized through the date of foreclosure for multifamily loans which we elected to carry at fair value at the time of our purchase. We record charge-offs and recoveries on loans held by consolidated trusts when a loss event (such as a foreclosure transfer or foreclosure alternative) occurs on a loan while it remains in a consolidated trust.
-3	Recoveries of charge-offs primarily result from foreclosure alternatives and REO acquisitions on loans where: (a) a share of default risk has been assumed by mortgage insurers, servicers, or other third parties through certain credit enhancements; or (b) we received a reimbursement of our losses from a seller/servicer associated with a repurchase request on a loan that experienced a foreclosure transfer or a foreclosure alternative.
-4	Consists of: (a) approximately $(0.1) billion and $0.8 billion during the three months ended September 30, 2014 and 2013, respectively, and $0.6 billion and $2.9 billion during the nine months ended September 30, 2014 and 2013, respectively, of reclassified single-family reserves related to our removal of loans previously held by consolidated trusts, net of reclassifications for single-family loans subsequently resecuritized after such removal; and (b) approximately $0.2 billion and $0.3 billion during the three months ended September 30, 2014 and 2013, respectively, and $0.6 billion and $0.7 billion during the nine months ended September 30, 2014 and 2013, respectively, attributable to capitalization of past due interest on modified mortgage loans.
-5	Calculated as: (a) the total loan loss reserve balance for single-family loans less our estimate of reserve amounts associated with TDR concessions as of September 30, 2014 and September 30, 2013; divided by (b) the annualized charge-offs, net of recoveries (excluding recoveries for settlement related amounts), associated with single-family loans during the three months ended September 30, 2014 and September 30, 2013, respectively. Both the charge-offs and loan loss reserves exclude amounts associated with loans acquired with deteriorated credit (at the time of our acquisition).
-6	Calculated as: (a) the total loan loss reserve balance for single-family loans as of September 30, 2014 and September 30, 2013; divided by (b) the annualized charge-offs, net of recoveries (excluding recoveries for settlement related amounts), associated with single-family loans during the three months ended September 30, 2014 and September 30, 2013, respectively. Both the charge-offs and loan loss reserves exclude amounts associated with loans acquired with deteriorated credit quality (at the time of our acquisition).
The table below presents our allowance for loan losses and our recorded investment in mortgage loans, held-for-investment, by impairment evaluation methodology.
Table 4.4 — Net Investment in Mortgage Loans
	30-Sep-14									31-Dec-13
	Single-family			Multifamily			Total			Single-family			Multifamily			Total
	(in millions)
Recorded investment:
Collectively evaluated	$	1,561,107		$	43,559		$	1,604,666		$	1,551,667		$	49,598		$	1,601,265
Individually evaluated	100,171			989			101,160			98,140			1,276			99,416
Total recorded investment	1,661,278			44,548			1,705,826			1,649,807			50,874			1,700,681
Ending balance of the allowance for loan losses:
Collectively evaluated	(4,294		)	(28		)	(4,322		)	(5,939		)	(45		)	(5,984		)
Individually evaluated	(18,199		)	(53		)	(18,252		)	(18,554		)	(80		)	(18,634		)
Total ending balance of the allowance	(22,493		)	(81		)	(22,574		)	(24,493		)	(125		)	(24,618		)
Net investment in mortgage loans	$	1,638,785		$	44,467		$	1,683,252		$	1,625,314		$	50,749		$	1,676,063
A significant number of unsecuritized single-family mortgage loans on our consolidated balance sheets are individually evaluated for impairment while substantially all single-family mortgage loans held by our consolidated trusts are collectively evaluated for impairment. The ending balance of the allowance for loan losses associated with our held-for-investment unsecuritized mortgage loans represented approximately 12.7% and 12.9% of the recorded investment in such loans at September 30, 2014 and December 31, 2013, respectively, and a substantial portion of the allowance associated with these loans represented concessions provided to borrowers as part of loan modifications. The ending balance of the allowance for loan losses associated with mortgage loans held by our consolidated trusts represented approximately 0.2% of the recorded investment in such loans as of both September 30, 2014 and December 31, 2013.
Credit Protection and Other Forms of Credit Enhancement
In connection with many of our mortgage loans and other mortgage-related guarantees, we have credit protection in the form of primary mortgage insurance, pool insurance, recourse to lenders, credit risk transfer transactions, and other forms of credit enhancements.
The table below presents the UPB of loans on our consolidated balance sheets or underlying our financial guarantees with credit protection and the maximum amounts of potential loss recovery by type of credit protection.
Table 4.5 — Recourse and Other Forms of Credit Protection(1)
	UPB at						Maximum Coverage(2) at
	30-Sep-14			31-Dec-13			30-Sep-14			31-Dec-13
	(in millions)
Single-family:
Primary mortgage insurance	$	220,471		$	203,470		$	55,941		$	50,823
Other credit protection:
Credit risk transfer transactions(3)	132,172			56,903			5,515			1,183
Lender recourse and indemnifications	6,693			7,119			6,235			6,726
Pool insurance(4)	3,380			4,683			988			1,186
HFA indemnification(5)	3,466			4,051			3,323			3,323
Subordination(6)	2,442			2,644			347			399
Other credit enhancements	20			38			20			38
Total	$	368,644		$	278,908		$	72,369		$	63,678
Multifamily:
K Certificates(7)	$	69,218		$	59,326		$	12,412		$	10,601
Subordination(6)	4,418			4,435			756			756
HFA indemnification(5)	827			905			699			699
Other credit enhancements	5,855			6,666			1,685			1,834
Total	$	80,318		$	71,332		$	15,552		$	13,890
-1	Excludes: (a) FHA/VA and other governmental loans; (b) purchased credit protection associated with $10.2 billion and $11.5 billion in UPB of single-family loans underlying Other Guarantee Transactions as of September 30, 2014 and December 31, 2013, respectively; and (c) repurchase rights (subject to certain conditions and limitations) we have under representations and warranties provided by our agreements with seller/servicers to underwrite loans and service them in accordance with our standards.
-2	Except for subordination and K Certificates, this represents the remaining amount of loss recovery that is available subject to terms of counterparty agreements. For subordination and K Certificates coverage, this represents the UPB of the securities that are subordinate to our guarantee, which could provide protection by absorbing first losses.
-3	Represents: (a) STACR debt note transactions in which we issue and sell debt securities, the principal balance of which is subject to the performance of a reference pool of single-family mortgage loans owned or guaranteed by Freddie Mac; and (b) transactions in which we purchased insurance policies on a portion of the mezzanine loss positions that were not issued to third parties in certain STACR debt note transactions. UPB amounts presented represent the UPB of the loans in the associated reference pools as of the respective dates, excluding $42.0 billion at September 30, 2014 where the related loans are also covered by primary mortgage insurance. Maximum coverage amounts presented represent the outstanding balance of the debt securities held by third parties as well as the remaining aggregate limit of insurance purchased from third parties in ACIS transactions.
-4	Maximum coverage amounts presented have been limited to the UPB at period end. Excludes approximately $1.4 billion and $1.8 billion in UPB at September 30, 2014 and December 31, 2013, respectively, where the related loans are also covered by primary mortgage insurance.
-5	Represents the amount of potential reimbursement of losses on securities we have guaranteed that are backed by state and local HFA bonds related to the HFA initiative.
-6	Represents Freddie Mac issued mortgage-related securities with subordination protection, excluding multifamily K Certificates and those securities backed by state and local HFA bonds related to the HFA initiative.
-7	Represents multifamily K Certificates with subordination protection.
Primary mortgage insurance is the most prevalent type of credit enhancement protecting our single-family credit guarantee portfolio, and is provided on a loan-level basis. For information about counterparty risk associated with mortgage insurers, see “NOTE 15: CONCENTRATION OF CREDIT AND OTHER RISKS — Mortgage Insurers.”
Our structured agency credit risk (STACR) debt note transactions, in which we issue unsecured debt securities that reduce our exposure to credit risk, also provide credit enhancement protecting our single-family credit guarantee portfolio. Our agency credit insurance structures (ACIS) are insurance contracts that obligate the counterparty to reimburse us for credit losses based on a fixed severity schedule up to an aggregate limit that are incurred on our mezzanine credit loss positions associated with STACR debt note transactions in exchange for our payment of periodic premiums. We executed five STACR debt note transactions and two ACIS transactions during the nine months ended September 30, 2014. For more information about our STACR debt note transactions, see "NOTE 4: MORTGAGE LOANS AND LOAN LOSS RESERVES" in our 2013 Annual Report.
We also have credit enhancements protecting our multifamily mortgage portfolio. Subordination, primarily through our K Certificates, is the most prevalent type, whereby we mitigate our credit risk exposure by structuring our securities to sell the expected credit risk to private investors who purchase the subordinate tranches.
We also have credit protection for certain mortgage loans on our consolidated balance sheets that are covered by insurance or partial guarantees issued by federal agencies (such as FHA, VA, and USDA). The total UPB of these loans was $3.7 billion and $3.9 billion as of September 30, 2014 and December 31, 2013, respectively.

Impaired_Loans

Impaired Loans	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
IMPAIRED LOANS	'
	NOTE 5: IMPAIRED LOANS
	Individually Impaired Loans
	Individually impaired single-family loans include TDRs, as well as loans acquired under our financial guarantees with deteriorated credit quality. Individually impaired multifamily loans include TDRs, loans three monthly payments or more past due, and loans that are impaired based on management judgment. For a discussion of our significant accounting policies regarding impaired and non-accrual mortgage loans, which are applied consistently for multifamily loans and single-family loan classes, see “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES” in our 2013 Annual Report.
	Total loan loss reserves consist of a specific valuation allowance related to individually impaired mortgage loans, and a general reserve for other probable incurred losses. Our recorded investment in individually impaired mortgage loans and the related specific valuation allowance are summarized in the table below by product class (for single-family loans).
	Table 5.1 — Individually Impaired Loans
			Balance at September 30, 2014															For the Three Months Ended September 30, 2014								For the Nine Months Ended September 30, 2014
			UPB				Recorded				Associated				Net			Average			Interest			Interest		Average		Interest		Interest
							Investment				Allowance				Investment			Recorded			Income			Income		Recorded		Income		Income
																		Investment			Recognized			Recognized		Investment		Recognized		Recognized
																								On Cash						On Cash
																								Basis(1)						Basis(1)
			(in millions)
	Single-family —
	With no specific allowance recorded(2):
	20 and 30-year or more, amortizing fixed-rate(3)		$	6,051			$	3,932			N/A				$	3,932		$	3,941		$	105		$	12	$	3,618	$	277	$	27
	15-year amortizing fixed-rate(3)		66				45				N/A				45			45			3			—		37		7		1
	Adjustable-rate(4)		29				22				N/A				22			22			—			—		15		1		—
	Alt-A, interest-only, and option ARM(5)		1,718				1,149				N/A				1,149			1,151			22			2		1,119		60		4
	Total with no specific allowance recorded		7,864				5,148				N/A				5,148			5,159			130			14		4,789		345		32
	With specific allowance recorded:(6)
	20 and 30-year or more, amortizing fixed-rate(3)		77,543				76,419				$	(14,311	)		62,108			76,001			588			82		75,562		1,760		213
	15-year amortizing fixed-rate(3)		1,253				1,259				(40		)		1,219			1,225			13			3		1,255		41		7
	Adjustable-rate(4)		874				872				(68		)		804			857			5			2		891		17		4
	Alt-A, interest-only, and option ARM(5)		16,881				16,473				(3,780		)		12,693			16,410			95			19		16,531		286		46
	Total with specific allowance recorded		96,551				95,023				(18,199		)		76,824			94,493			701			106		94,239		2,104		270
	Combined single-family:
	20 and 30-year or more, amortizing fixed-rate(3)		83,594				80,351				(14,311		)		66,040			79,942			693			94		79,180		2,037		240
	15-year amortizing fixed-rate(3)		1,319				1,304				(40		)		1,264			1,270			16			3		1,292		48		8
	Adjustable-rate(4)		903				894				(68		)		826			879			5			2		906		18		4
	Alt-A, interest-only, and option ARM(5)		18,599				17,622				(3,780		)		13,842			17,561			117			21		17,650		346		50
	Total single-family(7)		$	104,415			$	100,171			$	(18,199	)		$	81,972		$	99,652		$	831		$	120	$	99,028	$	2,449	$	302
	Multifamily —
	With no specific allowance recorded(8)		$	532			$	521			N/A				$	521		$	526		$	8		$	2	$	656	$	24	$	7
	With specific allowance recorded		476				468				$	(53	)		415			474			6			4		521		19		13
	Total multifamily		$	1,008			$	989			$	(53	)		$	936		$	1,000		$	14		$	6	$	1,177	$	43	$	20
	Total single-family and multifamily		$	105,423			$	101,160			$	(18,252	)		$	82,908		$	100,652		$	845		$	126	$	100,205	$	2,492	$	322
			Balance at December 31, 2013															For the Three Months Ended September 30, 2013								For the Nine Months Ended September 30, 2013
			UPB				Recorded Investment				Associated				Net			Average			Interest			Interest		Average		Interest		Interest
											Allowance				Investment			Recorded			Income			Income		Recorded		Income		Income
																		Investment			Recognized			Recognized		Investment		Recognized		Recognized
																								On Cash						On Cash
																								Basis(1)						Basis(1)
		(in millions)
	Single-family —
	With no specific allowance recorded(2):
	20 and 30-year or more, amortizing fixed-rate(3)		$	5,927			$	3,355			N/A				$	3,355		$	3,430		$	100		$	7	$	3,346	$	304	$	27
	15-year amortizing fixed-rate(3)		62				34				N/A				34			32			1			—		30		5		1
	Adjustable rate(4)		19				13				N/A				13			14			—			—		13		1		—
	Alt-A, interest-only, and option ARM(5)		1,758				1,038				N/A				1,038			1,016			18			—		957		53		5
	Total with no specific allowance recorded		7,766				4,440				N/A				4,440			4,492			119			7		4,346		363		33
	With specific allowance recorded:(6)
	20 and 30-year or more, amortizing fixed-rate(3)		75,633				74,554				$	(14,431	)		60,123			70,632			518			63		68,962		1,571		218
	15-year amortizing fixed-rate(3)		1,324				1,324				(43		)		1,281			1,115			12			3		1,095		37		8
	Adjustable rate(4)		967				962				(84		)		878			862			5			1		848		16		4
	Alt-A, interest-only, and option ARM(5)		17,210				16,860				(3,996		)		12,864			16,514			84			10		16,508		273		53
	Total with specific allowance recorded		95,134				93,700				(18,554		)		75,146			89,123			619			77		87,413		1,897		283
	Combined single-family:
	20 and 30-year or more, amortizing fixed-rate(3)		81,560				77,909				(14,431		)		63,478			74,062			618			70		72,308		1,875		245
	15-year amortizing fixed-rate(3)		1,386				1,358				(43		)		1,315			1,147			13			3		1,125		42		9
	Adjustable rate (4)		986				975				(84		)		891			876			5			1		861		17		4
	Alt-A, interest-only, and option ARM(5)		18,968				17,898				(3,996		)		13,902			17,530			102			10		17,465		326		58
	Total single-family(7)		$	102,900			$	98,140			$	(18,554	)		$	79,586		$	93,615		$	738		$	84	$	91,759	$	2,260	$	316
	Multifamily —
With no specific allowance recorded(8)		$	694			$	681			N/A				$	681		$	848		$	11		$	4	$	1,099	$	39	$	16
With specific allowance recorded		608				595				$	(80	)		515			761			10			8		888		33		27
Total multifamily		$	1,302			$	1,276			$	(80	)		$	1,196		$	1,609		$	21		$	12	$	1,987	$	72	$	43
Total single-family and multifamily		$	104,202			$	99,416			$	(18,634	)		$	80,782		$	95,224		$	759		$	96	$	93,746	$	2,332	$	359
-1	Consists of income recognized during the period related to loans categorized as non-accrual.
-2	Individually impaired loans with no specific related valuation allowance primarily represent mortgage loans removed from PC pools and accounted for in accordance with the accounting guidance for loans and debt securities acquired with deteriorated credit quality that have not experienced further deterioration.
-3	See endnote (3) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
-4	Includes balloon/reset mortgage loans and excludes option ARMs.
-5	See endnote (5) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
-6	Consists primarily of mortgage loans classified as TDRs.
-7	As of September 30, 2014 and December 31, 2013 includes $96.6 billion and $95.1 billion, respectively, of UPB associated with loans for which we have recorded a specific allowance, and $7.9 billion and $7.8 billion, respectively, of UPB associated with loans that have no specific allowance recorded. See endnote (2) for additional information.
-8	Individually impaired multifamily loans with no specific related valuation allowance primarily represent those loans for which the collateral value is sufficiently in excess of the loan balance to result in recovery of the entire recorded investment if the property were foreclosed upon or otherwise subject to disposition.
Mortgage Loan Performance
The table below presents the recorded investment of our single-family and multifamily mortgage loans, held-for-investment, by payment status.
Table 5.2 — Payment Status of Mortgage Loans(1)
	30-Sep-14
	Current				One				Two				Three Months or			Total			Non-accrual
					Month				Months				More Past Due,
					Past Due				Past Due				or in Foreclosure
	(in millions)
Single-family:
20 and 30-year or more, amortizing fixed-rate(2)	$	1,194,713			$	17,839			$	5,955			$	24,200		$	1,242,707		$	24,195
15-year amortizing fixed-rate(2)	283,527				1,021				234				716			285,498			716
Adjustable-rate(3)	65,472				426				121				666			66,685			666
Alt-A, interest-only, and option ARM(4)	55,466				2,367				969				7,586			66,388			7,584
Total single-family	1,599,178				21,653				7,279				33,168			1,661,278			33,161
Total multifamily	44,535				—				4				9			44,548			411
Total single-family and multifamily	$	1,643,713			$	21,653			$	7,283			$	33,177		$	1,705,826		$	33,572
	December 31, 2013
	Current				One				Two				Three Months or			Total			Non-accrual
					Month				Months				More Past Due,
					Past Due				Past Due				or in Foreclosure
	(in millions)
Single-family:
20 and 30-year or more, amortizing fixed-rate(2)	$	1,157,057			$	19,743			$	6,675			$	29,635		$	1,213,110		$	29,620
15-year amortizing fixed-rate(2)	293,286				1,196				271				864			295,617			863
Adjustable-rate(3)	62,987				495				147				871			64,500			871
Alt-A, interest-only, and option ARM(4)	62,356				2,898				1,157				10,169			76,580			10,162
Total single-family	1,575,686				24,332				8,250				41,539			1,649,807			41,516
Total multifamily	50,827				—				21				26			50,874			627
Total single-family and multifamily	$	1,626,513			$	24,332			$	8,271			$	41,565		$	1,700,681		$	42,143
-1	Based on recorded investment in the loan. Mortgage loans that have been modified are not counted as past due as long as the borrower is current under the modified terms. The payment status of a loan may be affected by temporary timing differences, or lags, in the reporting of this information to us by our servicers.
-2	See endnote (3) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
-3	Includes balloon/reset mortgage loans and excludes option ARMs.
-4	See endnote (5) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
We have the option under our PC master trust agreement to remove mortgage loans that underlie our PCs under certain circumstances to resolve an existing or impending delinquency or default. Our practice generally has been to remove loans from PC trusts when the loans have been delinquent for 120 days or more. As of September 30, 2014, there were $0.8 billion in UPB of loans underlying our PCs that were 120 days or more delinquent, and that met our criteria for removing the loan from the PC trust. Generally, we remove these delinquent loans from the PC trust, and thereby extinguish the related PC debt at the next scheduled PC payment date, unless the loans proceed to foreclosure transfer, complete a foreclosure alternative or are paid in full by the borrower before such date.
When we remove mortgage loans from PC trusts, we reclassify the loans from mortgage loans held-for-investment by consolidated trusts to unsecuritized mortgage loans held-for-investment and record an extinguishment of the corresponding portion of the debt securities of the consolidated trusts. We removed $2.5 billion and $8.8 billion in UPB of loans from PC trusts (or purchased delinquent loans associated with other guarantee commitments) for the three and nine months ended September 30, 2014, respectively, compared to $4.0 billion and $14.6 billion in UPB for the three and nine months ended September 30, 2013, respectively.
The table below summarizes the delinquency rates of mortgage loans within our single-family credit guarantee and multifamily mortgage portfolios.
Table 5.3 — Delinquency Rates
	30-Sep-14				31-Dec-13
Single-family:(1)
Non-credit-enhanced portfolio
Serious delinquency rate	1.8		%		2.09		%
Total number of seriously delinquent loans	155,955				190,119
Credit-enhanced portfolio:(2)
Primary mortgage insurance:
Serious delinquency rate	2.84		%		4.4		%
Total number of seriously delinquent loans	40,003				51,600
Other credit protection:(3)
Serious delinquency rate	1.41		%		3.66		%
Total number of seriously delinquent loans	13,064				15,828
Total single-family:
Serious delinquency rate	1.96		%		2.39		%
Total number of seriously delinquent loans	207,862				255,325
Multifamily:(4)
Non-credit-enhanced portfolio:
Delinquency rate	0.02		%		0.07		%
UPB of delinquent loans (in millions)	$	13			$	46
Credit-enhanced portfolio:
Delinquency rate	0.03		%		0.11		%
UPB of delinquent loans (in millions)	$	26			$	75
Total Multifamily:
Delinquency rate	0.03		%		0.09		%
UPB of delinquent loans (in millions)	$	39			$	121
-1	Single-family mortgage loans that have been modified are not counted as seriously delinquent if the borrower is less than three monthly payments past due under the modified terms. Serious delinquencies on single-family mortgage loans underlying certain REMICs and Other Structured Securities, Other Guarantee Transactions, and other guarantee commitments may be reported on a different schedule due to variances in industry practice. In the third quarter of 2014, we revised our presentation of single-family non-credit enhanced and credit-enhanced serious delinquency rates. This revision did not impact our total single-family serious delinquency rate. Prior periods have been revised to conform with the current presentation.
-2	The credit enhanced categories are not mutually exclusive as a single loan may be covered by both primary mortgage insurance and other credit protection.
-3	Consists of single-family mortgage loans covered by financial arrangements (other than primary mortgage insurance) that are designed to reduce our credit risk exposure, including loans in reference pools of mortgages covered by STACR transactions as well as other forms of credit protection. See "Table 4.5 — Recourse and Other Forms of Credit Protection " for more information.
-4	Multifamily delinquency performance is based on UPB of mortgage loans that are two monthly payments or more past due or those in the process of foreclosure and includes multifamily Other Guarantee Transactions (e.g., K Certificates). Excludes mortgage loans that have been modified as long as the borrower is less than two monthly payments past due under the modified contractual terms.
We continue to implement a number of initiatives to refinance and modify loans, including the MHA Program and the servicing alignment initiative. As part of accomplishing certain of these initiatives, we pay various incentives to servicers and borrowers. We bear the full costs associated with these loan workout and foreclosure alternatives on mortgages that we own or guarantee, including the cost of any monthly payment reductions.
Troubled Debt Restructurings
Single-Family TDRs
For information about our loss mitigation activities that can result in our granting a concession to a borrower, including our participation in HAMP, see “NOTE 5: INDIVIDUALLY IMPAIRED AND NON-PERFORMING LOANS” in our 2013 Annual Report.
During the three and nine months ended September 30, 2014 approximately 47% and 53% of completed single-family loan modifications that were classified as TDRs involved interest rate reductions and, in certain cases, term extensions and approximately 22% and 27%, respectively, involved principal forbearance in addition to interest rate reductions and, in certain cases, term extensions. During the three and nine months ended September 30, 2014, the average term extension was 194 and 180 months and the average interest rate reduction was 1.1% and 1.4%, respectively, on completed single-family loan modifications classified as TDRs.
TDR Activity and Performance
The table below presents the volume of single-family and multifamily loans that were newly classified as TDRs during the three and nine months ended September 30, 2014 and 2013, based on the original category of the loan before the loan was classified as a TDR. Loans classified as a TDR in one period may be subject to further action (such as a modification or remodification) in a subsequent period. In such cases, the subsequent action would not be reflected in the table below since the loan would already have been classified as a TDR.
Table 5.4 — TDR Activity, by Segment
	Three Months Ended September 30,														Nine Months Ended September 30,
	2014							2013							2014					2013
	Number of Loans			Post-TDR				Number of Loans			Post-TDR				Number of Loans		Post-TDR			Number of Loans		Post-TDR
				Recorded							Recorded						Recorded					Recorded
				Investment							Investment						Investment					Investment
	(dollars in millions)
Single-family:(1)
20 and 30-year or more, amortizing fixed-rate(2)	17,194			$	2,518			25,289			$	3,916			52,356		$	7,863		69,681		$	11,149
15-year amortizing fixed-rate	1,931			139				2,020			156				5,278		394			6,617		486
Adjustable-rate(3)	397			61				694			122				1,336		207			2,372		382
Alt-A, interest-only, and option ARM(4)	2,070			418				4,356			952				7,206		1,472			13,063		2,960
Total Single-family	21,592			3,136				32,359			5,146				66,176		9,936			91,733		14,977
Multifamily	—			—				3			25				1		10			8		98
Total	21,592			$	3,136			32,362			$	5,171			66,177		$	9,946		91,741		$	15,075
-1	The pre-TDR recorded investment for single-family loans initially classified as TDR during the three and nine months ended September 30, 2014 was $3.1 billion and $9.9 billion, respectively, compared to $5.1 billion and $14.9 billion during the three and nine months ended September 30, 2013, respectively.
-2	See endnote (3) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
-3	Includes balloon/reset mortgage loans and excludes option ARMs.
-4	See endnote (5) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
The table below presents the volume of our TDR modifications that experienced payment defaults (i.e., loans that became two months delinquent or completed a loss event) during the applicable periods and had completed a modification during the year preceding the payment default. The table presents loans based on their original product category before modification and excludes loans subject to other loss mitigation activity. Substantially all of our completed single-family loan modifications classified as a TDR during the nine months ended September 30, 2014 resulted in a modified loan with a fixed interest rate. However, many of these fixed-rate loans include provisions for the reduced interest rates to remain fixed for the first five years of the modification and then increase at a rate of up to one percent per year until the interest rate has been adjusted to the market rate that was in effect at the time of the modification.
Table 5.5 — Payment Defaults of Completed TDR Modifications, by Segment(1)
	Three Months Ended September 30,														Nine Months Ended September 30,
	2014							2013							2014					2013
	Number of Loans			Post-TDR				Number of Loans			Post-TDR				Number of Loans		Post-TDR			Number of Loans		Post-TDR
				Recorded							Recorded						Recorded					Recorded
				Investment(2)							Investment(2)						Investment(2)					Investment(2)
	(dollars in millions)
Single-family:
20 and 30-year or more, amortizing fixed-rate(3)	5,190			$	922			3,943			$	726			13,814		$	2,483		10,726		$	1,989
15-year amortizing fixed-rate	170			16				106			12				461		45			323		36
Adjustable-rate	88			15				64			14				250		46			167		34
Alt-A, interest-only, and option ARM(4)	604			138				590			155				1,778		428			1,652		437
Total single-family	6,052			$	1,091			4,703			$	907			16,303		$	3,002		12,868		$	2,496
Multifamily	—			$	—			—			$	—			—		$	—		—		$	—
-1	Represents TDR loans that experienced a payment default during the period and had completed a modification during the year preceding the payment default. A payment default occurs when a borrower either: (a) became two or more months delinquent; or (b) completed a loss event, such as a short sale or foreclosure transfer. We only include payment defaults for a single loan once during each quarterly period within a year; however, a single loan will be reflected more than once if the borrower experienced another payment default in a subsequent quarterly period.
-2	Represents the recorded investment at the end of the period in which the loan was modified and does not represent the recorded investment as of September 30.
-3	See endnote (3) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
-4	See endnote (5) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
In addition to modifications, loans may be initially classified as TDRs as a result of other loss mitigation activities (i.e., repayment plans, forbearance agreements, or trial period modifications). During the nine months ended September 30, 2014 and 2013, 6,779 and 6,136, respectively, of such loans (with a post-TDR recorded investment of $1.0 billion for both periods) experienced a payment default within a year after the loss mitigation activity occurred.
Loans may also be initially classified as TDRs because the borrowers’ debts were discharged in Chapter 7 bankruptcy (and the loan was not already classified as a TDR for other reasons). During the nine months ended September 30, 2014 and 2013, 3,027 and 15,611, respectively, of such loans (with a post-TDR recorded investment of $0.5 billion and $2.6 billion, respectively) experienced a payment default within a year after the borrowers' bankruptcy.

Real_Estate_Owned

Real Estate Owned	9 Months Ended
	Sep. 30, 2014
Repossessed Assets [Abstract]	'
REAL ESTATE OWNED	'
	NOTE 6: REAL ESTATE OWNED
	We obtain REO properties: (a) when we are the highest bidder at foreclosure sales of properties that collateralize single-family and multifamily mortgage loans owned by us; or (b) when a delinquent borrower chooses to transfer the mortgaged property to us in lieu of going through the foreclosure process (i.e., deed in lieu of foreclosure). See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES” in our 2013 Annual Report for a discussion of our significant accounting policies for REO.
	The table below provides a summary of the change in the carrying value of our combined single-family and multifamily REO balances. For the periods presented in the table below, the weighted average holding period for our disposed properties was less than one year.
	Table 6.1 — REO
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
		(in millions)
	Beginning balance — REO	$	3,696		$	4,073		$	4,602		$	4,407
	Additions	815			1,832			3,293			4,820
	Dispositions	(1,475		)	(1,523		)	(4,859		)	(4,845		)
	Ending balance — REO	3,036			4,382			3,036			4,382
	Beginning balance, valuation allowance	(19		)	(22		)	(51		)	(29		)
	Change in valuation allowance	(106		)	8			(74		)	15
	Ending balance, valuation allowance	(125		)	(14		)	(125		)	(14		)
	Ending balance — REO, net	$	2,911		$	4,368		$	2,911		$	4,368
	The REO balance, net at September 30, 2014 and December 31, 2013 associated with single-family properties was $2.9 billion and $4.5 billion, respectively, and the balance associated with multifamily properties was $0 million and $10 million, respectively. The Southeast region represented approximately 35% and 34% of our single-family REO additions during the three months ended September 30, 2014 and 2013, respectively, based on the number of properties, and the North Central region represented approximately 26% and 28% of our single-family REO additions during these periods. Our single-family REO inventory consisted of 29,344 properties and 47,307 properties at September 30, 2014 and December 31, 2013, respectively. In recent years, the foreclosure process has been significantly slowed in many geographic areas, particularly in states that require a judicial foreclosure process, which extends the time it takes for loans to be foreclosed upon and the underlying property to transition to REO. See “NOTE 15: CONCENTRATION OF CREDIT AND OTHER RISKS” for additional information about regional concentrations in our portfolio.
	Excluding holding period valuation adjustments and recoveries, we recognized gains of $132 million and $212 million on REO dispositions during the three months ended September 30, 2014 and 2013, respectively, and $415 million and $608 million on REO dispositions during the nine months ended September 30, 2014 and 2013, respectively. We increased (decreased) our valuation allowance for properties in our REO inventory by $111 million and $(5) million during the three months ended September 30, 2014 and 2013, respectively, and $110 million and $12 million during the nine months ended September 30, 2014 and 2013, respectively.
	REO property acquisitions that result from extinguishment of our mortgage loans held on our consolidated balance sheets are treated as non-cash transfers. The amount of non-cash acquisitions of REO properties during the nine months ended September 30, 2014 and 2013 was $3.1 billion and $4.5 billion, respectively.

Investments_in_Securities

Investments in Securities	9 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
INVESTMENTS IN SECURITIES	'
	NOTE 7: INVESTMENTS IN SECURITIES
	The table below summarizes amortized cost, estimated fair values, and corresponding gross unrealized gains and gross unrealized losses for available-for-sale securities by major security type. At September 30, 2014 and December 31, 2013, all available-for-sale securities are mortgage-related securities.
	Table 7.1 — Available-For-Sale Securities
								Gross Unrealized Losses
	30-Sep-14	Amortized			Gross			Other-Than-Temporary Impairment(1)			Temporary Impairment(2)			Fair
		Cost			Unrealized									Value
					Gains
		(in millions)
	Available-for-sale securities:
	Freddie Mac	$	40,070		$	1,376		$	—		$	(83	)	$	41,363
	Fannie Mae	9,845			686			—			(5		)	10,526
	Ginnie Mae	194			17			—			(1		)	210
	CMBS	22,735			982			(3		)	(100		)	23,614
	Subprime	22,543			1,038			(780		)	(100		)	22,701
	Option ARM	5,575			355			(219		)	(4		)	5,707
	Alt-A and other	4,897			649			(26		)	(7		)	5,513
	Obligations of states and political subdivisions	2,461			35			—			(3		)	2,493
	Manufactured housing	574			79			(2		)	(1		)	650
	Total available-for-sale securities	$	108,894		$	5,217		$	(1,030	)	$	(304	)	$	112,777
	31-Dec-13
	Available-for-sale securities:
	Freddie Mac	$	39,001		$	1,847		$	—		$	(189	)	$	40,659
	Fannie Mae	10,140			660			—			(3		)	10,797
	Ginnie Mae	149			18			—			—			167
	CMBS	29,151			1,524			(23		)	(314		)	30,338
	Subprime	29,897			382			(2,467		)	(313		)	27,499
	Option ARM	6,617			338			(376		)	(5		)	6,574
	Alt-A and other	8,322			526			(118		)	(24		)	8,706
	Obligations of states and political subdivisions	3,533			23			(7		)	(54		)	3,495
	Manufactured housing	629			61			(4		)	(2		)	684
	Total available-for-sale securities	$	127,439		$	5,379		$	(2,995	)	$	(904	)	$	128,919
	-1	Represents the gross unrealized losses for securities for which we have previously recognized other-than-temporary impairments in earnings.
	-2	Represents the gross unrealized losses for securities for which we have not previously recognized other-than-temporary impairments in earnings.
	Available-For-Sale Securities in a Gross Unrealized Loss Position
	The table below shows the fair value of available-for-sale securities in a gross unrealized loss position, and whether they have been in that position less than 12 months, or 12 months or greater.
	Table 7.2 — Available-For-Sale Securities in a Gross Unrealized Loss Position
		Less than 12 Months						12 Months or Greater
	30-Sep-14	Fair			Gross Unrealized Losses			Fair			Gross Unrealized Losses
		Value						Value
		(in millions)
	Available-for-sale securities:
	Freddie Mac	$	5,838		$	(36	)	$	1,163		$	(47	)
	Fannie Mae	467			(3		)	48			(2		)
	Ginnie Mae	69			(1		)	—			—
	CMBS	582			(12		)	1,643			(91		)
	Subprime	606			(9		)	8,852			(871		)
	Option ARM	513			(4		)	1,790			(219		)
	Alt-A and other	204			(4		)	562			(29		)
	Obligations of states and political subdivisions	5			—			188			(3		)
	Manufactured housing	18			—			32			(3		)
	Total available-for-sale securities in a gross unrealized loss position	$	8,302		$	(69	)	$	14,278		$	(1,265	)
	31-Dec-13
	Available-for-sale securities:
	Freddie Mac	$	7,957		$	(144	)	$	649		$	(45	)
	Fannie Mae	248			(2		)	19			(1		)
	CMBS	1,147			(85		)	1,992			(252		)
	Subprime	472			(19		)	19,103			(2,761		)
	Option ARM	77			(2		)	2,608			(379		)
	Alt-A and other	262			(5		)	1,854			(137		)
	Obligations of states and political subdivisions	1,885			(56		)	24			(5		)
	Manufactured housing	—			—			65			(6		)
	Total available-for-sale securities in a gross unrealized loss position	$	12,048		$	(313	)	$	26,314		$	(3,586	)
	At September 30, 2014, total gross unrealized losses on available-for-sale securities were $1.3 billion. The gross unrealized losses relate to 458 individual lots representing 426 separate securities. We purchase multiple lots of individual securities at different times and at different costs. We determine gross unrealized gains and gross unrealized losses by specifically evaluating investment positions at the lot level; therefore, some of the lots we hold for a single security may be in an unrealized gain position while other lots for that security may be in an unrealized loss position, depending upon the amortized cost of the specific lot.
Impairment Recognition on Investments in Securities
We recognize impairment losses on available-for-sale securities within our consolidated statements of comprehensive income as net impairment of available-for-sale securities recognized in earnings when we conclude that a decrease in the fair value of a security is other-than-temporary. For information regarding our evaluation of our available-for-sale securities for impairment, see "NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Investments in Securities" and "NOTE 7: INVESTMENTS IN SECURITIES" in our 2013 Annual Report.
See “Table 7.2 — Available-For-Sale Securities in a Gross Unrealized Loss Position” for the length of time our available-for-sale securities have been in an unrealized loss position. Also see “Table 7.3 — Significant Modeled Attributes for Certain Available-For-Sale Non-Agency Mortgage-Related Securities” for the modeled default rates and severities that were used to determine whether our senior interests in certain non-agency mortgage-related securities would experience a cash shortfall.
As noted in “Table 7.4 — Net Impairment of Available-For-Sale Securities Recognized in Earnings,” our net impairment on available-for-sale securities during 2014 includes certain securities that we have the intent to sell prior to the recovery of the unrealized loss. In cases where we have the intent to sell or it is more likely than not that we will be required to sell the security before recovery of its amortized cost, the security’s entire decline in fair value would be deemed to be other-than-temporary and is recorded within our consolidated statements of comprehensive income as net impairment of available-for-sale securities recognized in earnings. For the remaining available-for-sale securities in an unrealized loss position at September 30, 2014, we have asserted that we have no intent to sell and that we believe it is not more likely than not that we will be required to sell the security before recovery of its amortized cost basis.
The table below presents the modeled attributes, including default rates, prepayment rates, and severities, without regard to subordination, that are used to determine whether our interests in certain available-for-sale non-agency mortgage-related securities will experience a cash shortfall.
Table 7.3 — Significant Modeled Attributes for Certain Available-For-Sale Non-Agency Mortgage-Related Securities
	30-Sep-14
							Alt-A(1)
	Subprime			Option ARM			Fixed Rate			Variable Rate			Hybrid Rate
	(dollars in millions)
Issuance Date
2004 and prior:
UPB	$	563		$	40		$	363		$	266		$	195
Weighted average collateral defaults(2)	34		%	21		%	13		%	30		%	17		%
Weighted average collateral severities(3)	57		%	45		%	46		%	43		%	39		%
Weighted average voluntary prepayment rates(4)	7		%	9		%	12		%	8		%	9		%
Average credit enhancements(5)	30		%	—		%	14		%	11		%	13		%
2005:00:00
UPB	$	2,839		$	1,786		$	535		$	386		$	1,283
Weighted average collateral defaults(2)	44		%	29		%	18		%	39		%	24		%
Weighted average collateral severities(3)	59		%	48		%	45		%	51		%	41		%
Weighted average voluntary prepayment rates(4)	4		%	8		%	11		%	7		%	10		%
Average credit enhancements(5)	48		%	1		%	(1		)%	17		%	2		%
2006:00:00
UPB	$	12,785		$	4,158		$	308		$	432		$	431
Weighted average collateral defaults(2)	50		%	38		%	26		%	42		%	33		%
Weighted average collateral severities(3)	59		%	49		%	45		%	49		%	41		%
Weighted average voluntary prepayment rates(4)	3		%	7		%	9		%	7		%	9		%
Average credit enhancements(5)	7		%	(3		)%	(2		)%	1		%	(4		)%
2007:00:00
UPB	$	14,519		$	2,509		$	121		$	467		$	208
Weighted average collateral defaults(2)	50		%	37		%	41		%	41		%	37		%
Weighted average collateral severities(3)	59		%	48		%	52		%	50		%	46		%
Weighted average voluntary prepayment rates(4)	2		%	7		%	7		%	7		%	8		%
Average credit enhancements(5)	3		%	3		%	(1		)%	(18		)%	—		%
Total:
UPB	$	30,706		$	8,493		$	1,327		$	1,551		$	2,117
Weighted average collateral defaults(2)	49		%	36		%	21		%	39		%	26		%
Weighted average collateral severities(3)	59		%	48		%	46		%	49		%	41		%
Weighted average voluntary prepayment rates(4)	3		%	7		%	10		%	7		%	10		%
Average credit enhancements(5)	9		%	—		%	3		%	1		%	2		%
-1	Excludes non-agency mortgage-related securities backed by other loans, which primarily consist of securities backed by home equity lines of credit.
-2	The expected cumulative default rate is expressed as a percentage of the current collateral UPB.
-3	The expected average loss given default is calculated as the ratio of cumulative loss over cumulative default for each security.
-4	The security’s voluntary prepayment rate represents the average of the monthly voluntary prepayment rate weighted by the security’s outstanding UPB.
-5	Positive values reflect the amount of subordination and other financial support (excluding credit enhancement provided by bond insurance) that will incur losses in the securitization structure before any losses are allocated to securities that we own. Percentage generally calculated based on: (a) the total UPB of securities subordinate to the securities we own; divided by (b) the total UPB of all of the securities issued by the trust (excluding notional balances). Negative values are shown when unallocated collateral losses will be allocated to the securities that we own in excess of current remaining credit enhancement, if any. The unallocated collateral losses have been considered in our assessment of other-than-temporary impairment.
Other-Than-Temporary Impairments on Available-for-Sale Securities
The table below summarizes our net impairment of available-for-sale securities recognized in earnings by security type.
Table 7.4 — Net Impairment of Available-For-Sale Securities Recognized in Earnings
	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
	(in millions)
Available-for-sale securities:(1)
CMBS	$	—		$	(3	)	$	—		$	(13	)
Subprime	(125		)	(45		)	(582		)	(91		)
Option ARM	(39		)	(12		)	(72		)	(17		)
Alt-A and other	(2		)	(66		)	(33		)	(91		)
Manufactured housing	—			—			—			(1		)
Total net impairment of available-for-sale securities recognized in earnings	$	(166	)	$	(126	)	$	(687	)	$	(213	)
-1	Includes $132 million and $598 million during the three and nine months ended September 30, 2014, respectively, compared to $118 million and $134 million during the three and nine months ended September 30, 2013, respectively, as we had the intent to sell the related securities before recovery of their amortized cost basis.
The table below presents the changes in the unrealized credit-related other-than-temporary impairment component of the amortized cost related to available-for-sale securities: (a) that we have written down for other-than-temporary impairment; and (b) for which the credit component of the loss has been recognized in earnings. The credit-related other-than-temporary impairment component of the amortized cost represents the difference between: (a) the present value of expected future cash flows at the time of impairment, including the estimated proceeds from bond insurance; and (b) the amortized cost basis of the security prior to considering credit losses. The beginning balances represent the other-than-temporary impairment credit loss components related to available-for-sale securities for which other-than-temporary impairment occurred prior to July 1, 2014, July 1, 2013, January 1, 2014, and January 1, 2013, respectively, but will not be realized until the securities are sold, written off, or mature. Net impairment of available-for-sale securities recognized in earnings is presented as additions in two components based upon whether the current period is: (a) the first time the debt security was credit-impaired; or (b) not the first time the debt security was credit-impaired. The credit loss component is reduced if we sell, intend to sell or believe we will be required to sell previously credit-impaired available-for-sale securities. Additionally, the credit loss component is reduced by the amortization resulting from significant increases in cash flows expected to be collected that are recognized over the remaining life of the security.
Table 7.5 — Other-Than-Temporary Impairments Related to Credit Losses on Available-For-Sale Securities
	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
	(in millions)
Credit-related other-than-temporary impairments on available-for-sale securities recognized in earnings:
Beginning balance — remaining credit losses on available-for-sale securities where other-than-temporary impairments were recognized in earnings	$	11,118		$	15,772		$	14,463		$	16,745
Additions:
Amounts related to credit losses for which an other-than-temporary impairment was not previously recognized	—			4			—			20
Amounts related to credit losses for which an other-than-temporary impairment was previously recognized	34			4			89			59
Reductions:
Amounts related to securities which were sold, written off, or matured	(807		)	(261		)	(1,141		)	(1,066		)
Amounts for which we intend to sell the security or it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis	(1,949		)	(182		)	(4,736		)	(291		)
Amounts related to amortization resulting from significant increases in cash flows expected to be collected and/or due to the passage of time that are recognized over the remaining life of the security	(110		)	(137		)	(389		)	(267		)
Ending balance — remaining credit losses on available-for-sale securities where other-than-temporary impairments were recognized in earnings(1)	$	8,286		$	15,200		$	8,286		$	15,200
-1	Excludes other-than-temporary impairments on securities that we intend to sell or it is more likely than not that we will be required to sell before recovery of the unrealized losses.
Realized Gains and Losses on Sales of Available-For-Sale Securities
The table below illustrates the gross realized gains and gross realized losses from the sale of available-for-sale securities.
Table 7.6 — Gross Realized Gains and Gross Realized Losses on Sales of Available-For-Sale Securities
	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
	(in millions)
Gross realized gains
Mortgage-related securities:
Freddie Mac	$	81		$	172		$	745		$	248
Fannie Mae	11			1			52			17
CMBS	11			685			151			892
Alt-A and other	38			10			242			56
Obligations of states and political subdivisions	—			1			1			13
Subprime	74			—			141			—
Option ARM	58			—			62			—
Total mortgage-related securities gross realized gains	273			869			1,394			1,226
Gross realized gains	273			869			1,394			1,226
Gross realized losses
Mortgage related securities:(1)
Freddie Mac	(9		)	(19		)	(11		)	(19		)
Option ARM	(24		)	(4		)	(24		)	(4		)
Alt-A and other	(5		)	(18		)	(6		)	(18		)
Subprime	(128		)	(1		)	(141		)	(3		)
Total mortgage-related securities gross realized losses	(166		)	(42		)	(182		)	(44		)
Gross realized losses	(166		)	(42		)	(182		)	(44		)
Net realized gains (losses)	$	107		$	827		$	1,212		$	1,182
-1	The individual sales do not change our conclusion, at period end, that we do not intend to sell our remaining mortgage-related available-for-sale securities that are in an unrealized loss position and it is not more likely than not that we will be required to sell these securities before a sufficient time to recover all unrealized losses.
Maturities of Available-For-Sale Securities
The table below summarizes the remaining contractual maturities of available-for-sale securities.
Table 7.7 — Maturities of Available-For-Sale Securities(1)
	As of September 30, 2014
													After One Year Through Five Years					After Five Years Through Ten Years
	Total Amortized Cost			Total Fair Value			One Year or Less															After Ten Years
							Amortized Cost			Fair Value			Amortized Cost			Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(in millions)
Available-for-sale securities:
Freddie Mac	$	40,070		$	41,363		$	—		$	—		$	428		$	443	$	585	$	619	$	39,057	$	40,301
Fannie Mae	9,845			10,526			1			1			73			77		117		129		9,654		10,319
Ginnie Mae	194			210			—			—			5			5		23		27		166		178
CMBS	22,735			23,614			—			—			316			332		8		8		22,411		23,274
Subprime	22,543			22,701			—			—			—			—		—		—		22,543		22,701
Option ARM	5,575			5,707			—			—			—			—		—		—		5,575		5,707
Alt-A and other	4,897			5,513			2			2			46			47		3		3		4,846		5,461
Obligations of states and political subdivisions	2,461			2,493			—			—			40			42		60		60		2,361		2,391
Manufactured housing	574			650			—			—			—			—		9		12		565		638
Total available-for-sale securities	$	108,894		$	112,777		$	3		$	3		$	908		$	946	$	805	$	858	$	107,178	$	110,970
-1	Maturity information provided is based on contractual maturities, which may not represent the expected life as obligations underlying these securities may be prepaid at any time without penalty.
Trading Securities
The table below summarizes the estimated fair values by major security type for trading securities. Our trading securities mainly consist of Treasury securities, agency fixed-rate and variable-rate pass-through mortgage-related securities, and agency REMICs, including inverse floating rate, interest-only and principal-only securities.
Table 7.8 — Trading Securities
	30-Sep-14			31-Dec-13
	(in millions)
Mortgage-related securities:
Freddie Mac	$	14,900		$	9,349
Fannie Mae	6,238			7,180
Ginnie Mae	17			98
Other	120			141
Total mortgage-related securities	21,275			16,768
U.S. Treasury securities	9,159			6,636
Total fair value of trading securities	$	30,434		$	23,404
With the exception of principal-only securities, our agency securities, classified as trading, were valued at a net premium (i.e., net fair value was higher than UPB) as of September 30, 2014.
For the three and nine months ended September 30, 2014, we recorded net unrealized gains (losses) on trading securities held at those dates of $(142) million and $(141) million, respectively. For the three and nine months ended September 30, 2013, we recorded net unrealized gains (losses) on trading securities held at those dates of $(0.2) billion and $(1.3) billion, respectively.

Debt_Securities_and_Subordinat

Debt Securities and Subordinated Borrowings	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
DEBT SECURITIES AND SUBORDINATED BORROWINGS	'
	NOTE 8: DEBT SECURITIES AND SUBORDINATED BORROWINGS
	Debt securities that we issue are classified on our consolidated balance sheets as either debt securities of consolidated trusts held by third parties or other debt. We issue other debt to fund our operations.
	Under the Purchase Agreement, without the prior written consent of Treasury, we may not incur indebtedness that would result in the par value of our aggregate indebtedness exceeding 120% of the amount of mortgage assets we are allowed to own on December 31 of the immediately preceding calendar year. Because of this debt limit, we may be restricted in the amount of debt we are allowed to issue to fund our operations. Under the Purchase Agreement, the amount of our “indebtedness” is determined without giving effect to the January 1, 2010 change in the accounting guidance related to transfers of financial assets and consolidation of VIEs. Therefore, “indebtedness” does not include debt securities of consolidated trusts held by third parties. We also cannot become liable for any subordinated indebtedness without the prior consent of Treasury. See “NOTE 2: CONSERVATORSHIP AND RELATED MATTERS” for information regarding restrictions on the amount of mortgage-related securities that we may own.
	Our debt cap under the Purchase Agreement is $663.0 billion in 2014 and will decline to $563.6 billion on January 1, 2015. As of September 30, 2014, our aggregate indebtedness was $439.5 billion. Our aggregate indebtedness is calculated as the par value of other debt.
	In the tables below, the categories of short-term debt (due within one year) and long-term debt (due after one year) are based on the original contractual maturity of the debt instruments classified as other debt.
	Other Debt
	The table below summarizes the balances and effective interest rates for other debt. We had no balances in federal funds purchased and securities sold under agreements to repurchase at either September 30, 2014 or December 31, 2013.
	Table 8.1 — Other Debt
		30-Sep-14											31-Dec-13
		Par Value				Balance,  Net(1)				Weighted			Par Value			Balance,  Net(1)		Weighted
										Average								Average
										Effective Rate(2)								Effective Rate(2)
		(dollars in millions)
	Other short-term debt:
	Reference Bills® securities and discount notes	$	111,857			$	111,817			0.12	%		$	137,767		$	137,712	0.13	%
	Medium-term notes	—				—				—			4,000			4,000		0.16
	Total other short-term debt	$	111,857			$	111,817			0.12			$	141,767		$	141,712	0.13
	Other long-term debt:
	Original maturities on or before December 31,
	2014	$	19,239			$	19,226			1.41	%		$	78,115		$	78,041	1.91	%
	2015	58,778				58,764				1.62			70,303			70,284		1.44
	2016	66,933				67,142				2.03			63,564			63,669		2.19
	2017	72,122				72,118				1.82			51,908			51,885		2.14
	2018	31,692				31,652				1.7			33,418			33,372		1.74
	Thereafter	78,913				74,987				2.83			72,270			67,804		2.93
	Total other long-term debt(3)	327,677				323,889				2.02			369,578			365,055		2.08
	Total other debt	$	439,534			$	435,706						$	511,345		$	506,767
	-1	Represents par value, net of associated discounts or premiums, and hedge-related basis adjustments. Includes $5.0 billion and $2.7 billion at September 30, 2014 and December 31, 2013, respectively, of other long-term debt that represents the fair value of debt securities with the fair value option elected.
	-2	Represents the weighted average effective rate that remains constant over the life of the instrument, which includes the amortization of discounts or premiums, issuance costs, and hedge-related basis adjustments.
	-3	Balance, net for other long-term debt includes callable debt of $106.2 billion and $107.5 billion at September 30, 2014 and December 31, 2013, respectively, which gives us the option to call or not call debt for a variety of reasons that include managing the composition of liabilities or economic reasons.
	Debt Securities of Consolidated Trusts Held by Third Parties
	Debt securities of consolidated trusts held by third parties represents our liability to third parties that hold beneficial interests in our consolidated securitization trusts (i.e., single-family PC trusts and certain single-family and multifamily Other Guarantee Transactions).
	The table below summarizes the debt securities of consolidated trusts held by third parties based on underlying mortgage product type.
	Table 8.2 — Debt Securities of Consolidated Trusts Held by Third Parties
		30-Sep-14													31-Dec-13
		Contractual		UPB				Balance,				Weighted			Contractual	UPB		Balance,		Weighted
		Maturity(1)						Net(2)				Average			Maturity(1)			Net(2)		Average
												Coupon(1)								Coupon(1)
		(dollars in millions)													(dollars in millions)
	Single-family:(3)
	30-year or more, fixed-rate	2014 - 2053		$	1,004,733			$	1,032,252			4.07	%		2014 - 2052	$	969,270	$	993,683	4.14	%
	20-year fixed-rate	2014 - 2034		72,710				74,974				3.77			2014 - 2034	75,910		78,252		3.81
	15-year fixed-rate	2014 - 2029		268,564				275,018				3.15			2014 - 2029	270,513		277,018		3.23
	Adjustable-rate	2014 - 2047		64,058				65,421				2.63			2014 - 2047	60,683		61,830		2.64
	Interest-only(4)	2026 - 2041		18,243				18,290				3.36			2026 - 2041	21,352		21,390		3.7
	FHA/VA	2015 - 2044		1,281				1,307				5.44			2014 - 2041	1,284		1,303		5.67
	Total single-family			1,429,589				1,467,262								1,399,012		1,433,476
	Multifamily(5)	2017 - 2019		525				583				4.77			2018 - 2019	444		508		4.96
	Total debt securities of consolidated trusts held by third parties(6)			$	1,430,114			$	1,467,845							$	1,399,456	$	1,433,984
	-1	Based on the contractual maturity and interest rate of debt securities of our consolidated trusts held by third parties.
	-2	Represents par value, net of associated discounts, premiums, and other basis adjustments.
	-3	Debt securities of consolidated trusts held by third parties are prepayable as the loans that collateralize the debt may prepay without penalty at any time.
	-4	Includes interest-only securities and interest-only mortgage loans that allow the borrowers to pay only interest for a fixed period of time before the loans begin to amortize.
	-5	Balance, Net includes interest-only securities recorded at fair value.
	-6	The effective rate for debt securities of consolidated trusts held by third parties was 3.21% and 3.39% as of September 30, 2014 and December 31, 2013, respectively.
	Subordinated Debt Interest and Principal Payments
	The terms of certain of our subordinated debt securities provide for us to defer payments of interest in the event we fail to maintain specified capital levels. However, in a September 23, 2008 statement concerning the conservatorship, the Director of FHFA stated that we would continue to make interest and principal payments on our subordinated debt, even if we fail to maintain required capital levels.

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
DERIVATIVES	'
	NOTE 9: DERIVATIVES
	Use of Derivatives
	We use derivatives primarily to manage the interest rate and prepayment risk associated with our investments in mortgage-related assets, net of related liabilities. When we use derivatives to mitigate our exposures, we consider a number of factors, including cost, exposure to counterparty risk, and our overall risk management strategy.
	We classify derivatives into three categories: (a) exchange-traded derivatives; (b) cleared derivatives; and (c) OTC derivatives. Exchange-traded derivatives include standardized interest-rate futures contracts and options on futures contracts. Cleared derivatives refer to those interest-rate swaps that the U.S. Commodity Futures Trading Commission has determined are subject to the central clearing requirement of the Dodd-Frank Act. OTC derivatives refer to those derivatives that are neither exchange-traded derivatives nor cleared derivatives.
	Types of Derivatives
	We principally use the following types of derivatives:
	•	LIBOR-based interest-rate swaps;
	•	LIBOR- and Treasury-based options (including swaptions); and
	•	LIBOR- and Treasury-based exchange-traded futures.
	In addition to swaps, futures, and purchased options, our derivative positions include written options and swaptions, commitments, swap guarantees, and credit derivatives. Our last foreign-currency swaps matured in January 2014.
	For additional information about our use of derivatives, and the types of derivatives that we use, see "NOTE 9: DERIVATIVES" in our 2013 Annual Report. For a discussion of our significant accounting policies related to derivatives, see “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Derivatives” in our 2013 Annual Report.
	Derivative Assets and Liabilities at Fair Value
	The table below presents the notional value and fair value of derivatives reported on our consolidated balance sheets.
	Table 9.1 — Derivative Assets and Liabilities at Fair Value
		30-Sep-14									31-Dec-13
		Notional or			Derivatives at Fair Value						Notional or			Derivatives at Fair Value
		Contractual									Contractual
		Amount			Assets			Liabilities			Amount			Assets			Liabilities
		(in millions)
	Total derivative portfolio
	Derivatives not designated as hedging instruments under the accounting guidance for derivatives and hedging
	Interest-rate swaps:
	Receive-fixed	$	219,773		$	4,145		$	(823	)	$	281,727		$	4,475		$	(2,438	)
	Pay-fixed	215,723			1,763			(9,436		)	242,597			5,540			(10,879		)
	Basis (floating to floating)	300			2			—			300			4			—
	Total interest-rate swaps	435,796			5,910			(10,259		)	524,624			10,019			(13,317		)
	Option-based:
	Call swaptions
	Purchased	53,800			2,012			—			59,290			2,373			—
	Written	5,855			—			(57		)	5,945			—			(201		)
	Put Swaptions
	Purchased	26,475			351			—			33,410			698			—
	Written	1,345			—			(2		)	—			—			—
	Other option-based derivatives(1)	13,915			692			—			23,365			1,041			(3		)
	Total option-based	101,390			3,055			(59		)	122,010			4,112			(204		)
	Futures	40,000			—			—			50,270			—			—
	Foreign-currency swaps	—			—			—			528			39			—
	Commitments	47,070			88			(66		)	18,731			61			(69		)
	Credit derivatives	5,307			14			(19		)	5,386			—			(6		)
	Swap guarantee derivatives	3,305			—			(28		)	3,477			—			(31		)
	Total derivatives not designated as hedging instruments	632,868			9,067			(10,431		)	725,026			14,231			(13,627		)
	Derivative interest receivable (payable)				803			(1,513		)				1,243			(1,835		)
	Netting adjustments(2)				(8,973		)	10,014						(14,411		)	15,282
	Total derivative portfolio, net	$	632,868		$	897		$	(1,930	)	$	725,026		$	1,063		$	(180	)
	-1	Primarily includes purchased interest-rate caps and floors.
	-2	Represents counterparty netting and cash collateral netting. Net cash collateral posted was $1.0 billion and $871 million at September 30, 2014 and December 31, 2013, respectively.
	The carrying value of our derivatives on our consolidated balance sheets is equal to their fair value, including net derivative interest receivable or payable and net trade/settle receivable or payable, and is net of cash collateral held or posted, where allowable. Derivatives in a net asset position are reported as derivative assets, net. Similarly, derivatives in a net liability position are reported as derivative liabilities, net.
	Non-cash collateral held is not recognized on our consolidated balance sheets as we do not obtain effective control over the collateral, and non-cash collateral posted is not de-recognized from our consolidated balance sheets as we do not relinquish effective control over the collateral. Therefore, non-cash collateral held or posted is not presented as an offset against derivative assets or derivative liabilities on our consolidated balance sheets.
	See “NOTE 10: COLLATERAL AND OFFSETTING OF ASSETS AND LIABILITIES” for information related to our derivative counterparties and collateral held and posted.
	Gains and Losses on Derivatives
	The table below presents the gains and losses on derivatives reported in our consolidated statements of comprehensive income.
	Table 9.2 — Gains and Losses on Derivatives
	Derivatives not designated as hedging	Derivative Gains (Losses)(1)
	instruments under the accounting	Three Months Ended September 30,						Nine Months Ended September 30,
	guidance for derivatives and hedging	2014			2013			2014			2013
		(in millions)
	Interest-rate swaps:
	Receive-fixed
	Foreign-currency denominated	$	—		$	(5	)	$	(1	)	$	(16	)
	U.S. dollar denominated	(751		)	(68		)	2,301			(8,326		)
	Total receive-fixed swaps	(751		)	(73		)	2,300			(8,342		)
	Pay-fixed	568			1,184			(5,804		)	14,752
	Basis (floating to floating)	(1		)	1			(1		)	(2		)
Total interest-rate swaps	(184		)	1,112			(3,505		)	6,408
Option based:
Call swaptions
Purchased	99			(94		)	1,172			(1,954		)
Written	7			42			(145		)	424
Put swaptions
Purchased	(41		)	(157		)	(817		)	(29		)
Other option-based derivatives(2)	13			(29		)	134			(338		)
Total option-based	78			(238		)	344			(1,897		)
Futures	(3		)	(2		)	(43		)	54
Foreign-currency swaps	—			20			(7		)	20
Commitments	100			(59		)	296			(180		)
Credit derivatives	19			—			(9		)	—
Swap guarantee derivatives	1			2			6			7
Other(3)	(1		)	(1		)	(2		)	(2		)
Subtotal	10			834			(2,920		)	4,410
Accrual of periodic settlements:(4)
Receive-fixed interest-rate swaps	726			1,005			2,343			2,831
Pay-fixed interest-rate swaps	(1,354		)	(1,913		)	(4,319		)	(5,579		)
Other	1			—			2			1
Total accrual of periodic settlements	(627		)	(908		)	(1,974		)	(2,747		)
Total	$	(617	)	$	(74	)	$	(4,894	)	$	1,663
-1	Gains (losses) are reported as derivative gains (losses) on our consolidated statements of comprehensive income.
-2	Primarily includes purchased interest-rate caps and floors.
-3	Includes fees and commissions paid on cleared and exchange-traded derivatives.
-4	The accrual of periodic cash settlements is recorded in derivative gains (losses) on our consolidated statements of comprehensive income.
Hedge Designation of Derivatives
At September 30, 2014 and December 31, 2013, we did not have any derivatives in hedge accounting relationships; however, there are deferred net losses recorded in AOCI related to closed cash flow hedges. Net deferred gains and losses on closed cash flow hedges (i.e., where the derivative is either terminated or redesignated) are included in AOCI until the related forecasted transaction affects earnings or is determined to be probable of not occurring. Amounts reclassified from AOCI linked to interest payments on other debt are recorded in other debt interest expense and amounts not linked to interest payments on other debt are recorded in expense related to derivatives. In the three months ended September 30, 2014 and 2013, we reclassified from AOCI into earnings, losses of $76 million and $110 million, respectively, related to closed cash flow hedges. In the nine months ended September 30, 2014 and 2013, we reclassified from AOCI into earnings, losses of $232 million and $365 million, respectively, related to closed cash flow hedges. See “NOTE 11: STOCKHOLDERS’ EQUITY — Accumulated Other Comprehensive Income — Future Reclassifications from AOCI to Net Income Related to Closed Cash Flow Hedges” for information about future reclassifications of deferred net losses related to closed cash flow hedges to net income.

Collateral_and_Offsetting_of_A

Collateral and Offsetting of Assets and Liabilities	9 Months Ended
	Sep. 30, 2014
Offsetting [Abstract]	'
COLLATERAL AND OFFSETTING OF ASSETS AND LIABILITIES	'
	NOTE 10: COLLATERAL AND OFFSETTING OF ASSETS AND LIABILITIES
	Derivative Portfolio
	Derivative Counterparties
	Our use of cleared derivatives, exchange-traded derivatives, and OTC derivatives exposes us to institutional credit risk. The requirement that we post initial and variation margin in connection with cleared and exchange-traded derivatives, such as cleared interest-rate swaps and futures contracts, exposes us to institutional credit risk in the event that our clearing members or the financial clearinghouses fail to meet their obligations. The use of cleared and exchange-traded derivatives decreases our credit risk exposure to individual counterparties because a central counterparty is substituted for individual counterparties. OTC derivatives expose us to the credit risk of individual counterparties because transactions are executed and settled between us and each counterparty, exposing us to potential losses if a counterparty fails to meet its obligations.
	Our use of interest rate swaps and option-based derivatives is subject to internal credit and legal reviews. On an ongoing basis, we review the credit fundamentals of all of our derivative counterparties, clearinghouses, and clearing members to confirm that they continue to meet our internal risk management standards.
	Master Netting and Collateral Agreements
	We use master netting and collateral agreements to reduce our credit risk exposure to our derivative counterparties for interest-rate swap and option-based derivatives. Master netting agreements provide for the netting of amounts receivable and payable from an individual counterparty, which reduces our exposure to a single counterparty in the event of default. On a daily basis, the market value of each counterparty’s derivatives outstanding is calculated to determine the amount of our net credit exposure, which is equal to derivatives in a net gain position by counterparty after giving consideration to collateral posted.
	Our collateral agreements require most counterparties to post collateral to us for the amount of our net exposure to them above the counterparty’s collateral posting threshold. Collateral posting thresholds are tied to a counterparty’s credit rating. Bilateral collateral agreements are in place for all of our active OTC derivative counterparties. For OTC derivatives, we are subject to collateral posting thresholds based on S&P or Moody’s credit rating of our long-term senior unsecured debt securities. The amount of margin we must post for cleared and exchange-traded derivatives may be based, in part, on S&P or Moody’s credit rating of our long-term senior unsecured debt securities. The lowering or withdrawal of our credit rating by S&P or Moody’s may increase our obligation to post collateral, depending on the amount of the counterparty’s exposure to Freddie Mac with respect to the derivative transactions. Collateral is typically transferred within one business day based on the values of the related derivatives. This time lag in posting collateral can affect our net uncollateralized exposure to derivative counterparties.
	Collateral posted by a derivative counterparty is typically in the form of cash, although U.S. Treasury securities and Freddie Mac mortgage-related securities may also be posted. In the event a counterparty defaults on its obligations under the derivatives agreement and the default is not remedied in the manner prescribed in the agreement, we have the right under the agreement to direct the custodian bank to transfer the collateral to us or to sell the collateral and transfer the proceeds to us. At September 30, 2014 and December 31, 2013, all amounts of cash collateral related to derivatives were offset against derivative assets, net or derivative liabilities, net, as applicable.
	Our net uncollateralized exposure to derivative counterparties for OTC interest-rate swap, option-based, and foreign-currency swap derivatives was $66 million and $188 million at September 30, 2014 and December 31, 2013, respectively. In the event that all of our counterparties for these derivatives were to have defaulted simultaneously on September 30, 2014, our maximum loss for accounting purposes after applying netting agreements and collateral on an individual counterparty basis would have been approximately $66 million. Four counterparties each accounted for greater than 10% and collectively accounted for 84% of our net uncollateralized exposure to derivative counterparties, excluding cleared and exchange-traded derivatives, commitments, swap guarantee derivatives, certain written options, and certain credit derivatives at September 30, 2014. Three of these counterparties, Toronto Dominion Bank, JP Morgan Chase Bank, and Barclays Bank PLC, were rated “A” or above and Royal Bank of Scotland PLC was rated "BBB+" using the lower of S&P’s or Moody’s rating stated in terms of the S&P equivalent as of September 30, 2014.
	Beginning with contracts executed or modified on or after June 10, 2013, the types of interest-rate swaps that we use most frequently became subject to the central clearing requirement. Our exposure to cleared and exchange-traded derivatives was $302 million and $382 million as of September 30, 2014 and December 31, 2013, respectively, which includes the consideration of cash collateral that has been posted for initial and variation margin. We net our exposure to cleared derivatives by clearinghouse and clearing member. Exchange-traded derivatives are settled on a daily basis through the payment of variation margin. We post initial and variation margin in connection with our cleared and exchange-traded derivatives. For information about margin we have posted in connection with cleared and exchange-traded derivatives, see “— Collateral Pledged.”
	The total exposure on our forward purchase and sale commitments, which are treated as derivatives, was $88 million and $61 million at September 30, 2014 and December 31, 2013, respectively. Many of our transactions involving forward purchase and sale commitments of mortgage-related securities, including our dollar roll transactions, utilize the Mortgage Backed Securities Division of the Fixed Income Clearing Corporation (“MBSD/FICC”) as a clearinghouse. As a clearing member of the clearinghouse, we post margin to the MBSD/FICC and are exposed to the institutional credit risk of the organization.
	The table below displays information related to derivatives and securities purchased under agreements to resell on our consolidated balance sheets.
	Table 10.1 — Offsetting of Financial Assets and Liabilities
		30-Sep-14
		Gross			Amount Offset			Net Amount			Gross Amount			Net
		Amount			in the Consolidated			Presented in			Not Offset in			Amount
		Recognized(1)			Balance Sheets			the Consolidated			the Consolidated
								Balance Sheets(2)			Balance Sheets(3)
		(in millions)
	Assets:
	Derivatives:
	Over-the-counter interest-rate swaps and option-based derivatives	$	9,312		$	(8,819	)	$	493		$	(427	)	$	66
	Cleared and exchange-traded derivatives	456			(154		)	302			—			302
	Other(4)	102			—			102			—			102
	Total derivatives	9,870			(8,973		)	897			(427		)	470
	Securities purchased under agreements to resell	29,956			—			29,956			(29,956		)	—
	Total	$	39,826		$	(8,973	)	$	30,853		$	(30,383	)	$	470
	Liabilities:
	Derivatives:
	Over-the-counter interest-rate swaps and option-based derivatives	$	(9,930	)	$	8,113		$	(1,817	)	$	1,782		$	(35	)
	Cleared and exchange-traded derivatives	(1,901		)	1,901			—			—			—
	Other(4)	(113		)	—			(113		)	—			(113		)
	Total	$	(11,944	)	$	10,014		$	(1,930	)	$	1,782		$	(148	)
		December 31, 2013
		Gross			Amount Offset in			Net Amount			Gross Amount			Net
		Amount			the Consolidated			Presented in the			Not Offset in the			Amount
		Recognized(1)			Balance Sheets			Consolidated			Consolidated
								Balance Sheets(2)			Balance Sheets(3)
		(in millions)
	Assets:
	Derivatives:
	Over-the-counter interest-rate and foreign-currency swaps, and option-based derivatives	$	13,886		$	(13,266	)	$	620		$	(432	)	$	188
	Cleared and exchange-traded derivatives	1,527			(1,145		)	382			—			382
	Other(4)	61			—			61			—			61
	Total derivatives	15,474			(14,411		)	1,063			(432		)	631
	Securities purchased under agreements to resell	62,383			—			62,383			(62,383		)	—
	Total	$	77,857		$	(14,411	)	$	63,446		$	(62,815	)	$	631
	Liabilities:
	Derivatives:
	Over-the-counter interest-rate and foreign-currency swaps, and option-based derivatives	$	(14,616	)	$	14,545		$	(71	)	$	—		$	(71	)
	Cleared and exchange-traded derivatives	(737		)	737			—			—			—
	Other(4)	(109		)	—			(109		)	—			(109		)
	Total	$	(15,462	)	$	15,282		$	(180	)	$	—		$	(180	)
	-1	For derivatives, includes interest receivable or payable and trade/settle receivable or payable.
	-2	For derivatives, includes cash collateral posted or held in excess of exposure.
	-3	Does not include the fair value amount of non-cash collateral posted or held that exceeds the associated net asset or liability presented on the consolidated balance sheets. For cleared and exchange-traded derivatives, does not include non-cash collateral posted by us with an aggregate fair value of $1.7 billion and $0.6 billion as of September 30, 2014 and December 31, 2013, respectively.
	-4	Includes commitments, swap guarantee derivatives, certain written options and credit derivatives.
	Collateral Pledged
	Collateral Pledged to Freddie Mac
	Our counterparties are required to pledge collateral for transactions involving securities purchased under agreements to resell. Also, most derivative instruments are subject to collateral posting thresholds as prescribed by the collateral agreements with our counterparties. Under the derivative collateral agreements, U.S. Treasury securities, Freddie Mac mortgage-related securities, and cash may be pledged. We consider the types of securities being pledged to us as collateral when determining how much we lend in transactions involving securities purchased under agreements to resell. Additionally, we regularly review the market values of these securities compared to amounts loaned and derivative counterparty collateral posting thresholds in an effort to manage our exposure to losses.
	We had cash and cash equivalents pledged to us related to OTC derivative instruments of $1.4 billion and $1.9 billion at September 30, 2014 and December 31, 2013, respectively. At September 30, 2014 and December 31, 2013, we had $427 million and $432 million, respectively, of collateral in the form of securities pledged to and held by us related to OTC derivative instruments. Although it is our practice not to repledge assets held as collateral, a portion of the collateral may be repledged based on master netting agreements related to our derivative instruments. In addition, we had $0 million and $646 million of cash pledged to us related to cleared derivatives at September 30, 2014 and December 31, 2013, respectively.
	Also, at September 30, 2014 and December 31, 2013, we had $0 billion and $5 billion, respectively, of securities pledged to us for transactions involving securities purchased under agreements to resell that we had the right to repledge. From time to time we may obtain pledges of collateral from certain seller/servicers as additional security for certain of their obligations to us, including their obligations to repurchase mortgages sold to us in breach of representations and warranties. This collateral may, at our discretion, take the form of cash, cash equivalents, or agency securities.
In addition, we hold cash and cash equivalents as collateral in connection with certain of our multifamily guarantees and mortgage loans as credit enhancements. The cash and cash equivalents held as collateral related to these transactions at September 30, 2014 and December 31, 2013 was $84 million and $66 million, respectively.
We consider federal funds sold to be overnight unsecured trades executed with insured depository institutions that are members of the Federal Reserve System. Federal funds sold trades are uninsured. We did not hold any federal funds sold at September 30, 2014 and December 31, 2013.
Collateral Pledged by Freddie Mac
We are required to pledge collateral for margin requirements with third-party custodians in connection with secured financings and derivative transactions with some counterparties. The amount of collateral pledged related to our derivative instruments is determined after giving consideration to our credit rating.
The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position on September 30, 2014, was $2.5 billion for which we posted cash and non-cash collateral of $2.5 billion in the normal course of business. Since we were fully collateralized as of September 30, 2014, we would not have been required to post additional collateral on that day if the credit-risk-related contingent features underlying these agreements were triggered.
The table below summarizes all securities pledged as collateral by us, including assets that the secured party may repledge.
Table 10.2 — Collateral in the Form of Securities Pledged
	30-Sep-14			31-Dec-13
	(in millions)
Securities pledged with the ability for the secured party to repledge:
Debt securities of consolidated trusts held by third parties(1)	$	2,152		$	10,654
Available-for-sale securities	—			70
Trading securities	1,393			365
Total securities pledged	$	3,545		$	11,089
-1	Represents PCs held by us in our Investments segment mortgage investments portfolio and pledged as collateral which are recorded as a reduction to debt securities of consolidated trusts held by third parties on our consolidated balance sheets.
Securities Pledged with the Ability of the Secured Party to Repledge
At September 30, 2014, we pledged securities with the ability of the secured party to repledge of $3.5 billion in connection with derivatives and securities transactions.
At December 31, 2013, we pledged securities with the ability of the secured party to repledge of $11.1 billion, of which $10.5 billion was collateral posted in connection with our secured uncommitted intraday line of credit with a third party. This line of credit expired in July 2014. Of the remainder at December 31, 2013, we pledged $0.6 billion in connection with derivative transactions.
Cash Pledged
At September 30, 2014, we pledged $2.6 billion of collateral in the form of cash and cash equivalents, of which $0.7 billion related to our OTC derivative agreements as we had $2.5 billion of such derivatives in a net loss position. At December 31, 2013, we pledged $3.4 billion of collateral in the form of cash and cash equivalents, of which $3.2 billion related to our OTC derivative agreements as we had $3.2 billion of such derivatives in a net loss position. The remaining $1.9 billion and $275 million was posted at clearing members or clearinghouses in connection with derivatives and securities transactions at September 30, 2014 and December 31, 2013, respectively.

Stockholders_Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2014
Stockholders' Equity Note [Abstract]	'
STOCKHOLDERS' EQUITY (DEFICIT)	'
	NOTE 11: STOCKHOLDERS’ EQUITY
	Senior Preferred Stock
	No cash was received from Treasury under the Purchase Agreement during the three months ended September 30, 2014, because we had positive net worth at June 30, 2014 and, consequently, FHFA did not request a draw on our behalf. At September 30, 2014, our assets exceeded our liabilities under GAAP; therefore no draw is being requested from Treasury under the Purchase Agreement. Our quarterly senior preferred stock dividend is the amount, if any, by which our Net Worth Amount at the end of the immediately preceding fiscal quarter exceeds the applicable Capital Reserve Amount, which was established at $3 billion for 2013 and declines to zero in 2018. Based on our Net Worth Amount at September 30, 2014 and the Capital Reserve Amount of $2.4 billion in 2014, our dividend obligation to Treasury in December 2014 will be $2.8 billion. See “NOTE 2: CONSERVATORSHIP AND RELATED MATTERS — Government Support for our Business” in our 2013 Annual Report for additional information. The aggregate liquidation preference on the senior preferred stock owned by Treasury was $72.3 billion and $72.3 billion as of September 30, 2014 and December 31, 2013, respectively. See “NOTE 18: REGULATORY CAPITAL” for additional information.
	Stock-Based Compensation
	We did not repurchase or issue any of our common shares or non-cumulative preferred stock during the three and nine months ended September 30, 2014. For a discussion regarding our stock-based compensation plans, see “NOTE 11: STOCKHOLDERS’ EQUITY (DEFICIT)” in our 2013 Annual Report.
	For purposes of the earnings-per-share calculation, all stock options outstanding at September 30, 2014 and 2013 were out of the money and excluded from the computation of dilutive potential common shares for the three and nine months ended September 30, 2014 and 2013, respectively. The weighted average common shares outstanding for the period includes the weighted average number of shares that are associated with the warrant for our common stock issued to Treasury pursuant to the Purchase Agreement.
	Dividends Declared
	No common dividends were declared during the nine months ended September 30, 2014. During the three months ended March 31, 2014, June 30, 2014, and September 30, 2014 we paid dividends of $10.4 billion, $4.5 billion, and $1.9 billion, respectively, in cash on the senior preferred stock at the direction of our Conservator. We did not declare or pay dividends on any other series of Freddie Mac preferred stock outstanding during the nine months ended September 30, 2014.
	Accumulated Other Comprehensive Income
	The table below presents changes in AOCI after the effects of our 35% federal statutory tax rate related to available-for-sale securities, closed cash flow hedges, and our defined benefit plans.
	Table 11.1 — Changes in AOCI by Component, Net of Tax
		Nine Months Ended September 30, 2014
		AOCI Related				AOCI Related				AOCI Related				Total
		to Available-				to Cash Flow				to Defined
		For-Sale				Hedge				Benefit Plans
		Securities(1)				Relationships(2)
		(in millions)
	Beginning balance	$	962			$	(1,000	)		$	32			$	(6	)
	Other comprehensive income before reclassifications(3)	1,903				—				1				1,904
	Amounts reclassified from accumulated other comprehensive income	(341		)		151				(2		)		(192		)
	Changes in AOCI by component	1,562				151				(1		)		1,712
	Ending balance	$	2,524			$	(849	)		$	31			$	1,706
		Nine Months Ended September 30, 2013
		AOCI Related				AOCI Related				AOCI Related				Total
		to Available-				to Cash Flow				to Defined
		For-Sale				Hedge				Benefit Plans
		Securities(1)				Relationships(2)
		(in millions)
	Beginning balance	$	(1,444	)		$	(1,316	)		$	(178	)		$	(2,938	)
	Other comprehensive income before reclassifications(3)	2,066				—				18				2,084
	Amounts reclassified from accumulated other comprehensive income	(630		)		250				6				(374		)
	Changes in AOCI by component	1,436				250				24				1,710
	Ending balance	$	(8	)		$	(1,066	)		$	(154	)		$	(1,228	)
	-1	The amounts reclassified from AOCI represent the gain or loss recognized in earnings due to a sale of an available-for-sale security or the recognition of a net impairment recognized in earnings. See “NOTE 7: INVESTMENTS IN SECURITIES” for more information.
	-2	The amounts reclassified from AOCI represent the AOCI amount that was recognized in earnings as the originally hedged forecasted transactions affected earnings, unless it was deemed probable that the forecasted transaction would not occur. If it is probable that the forecasted transaction will not occur, then the deferred gain or loss associated with the hedge related to the forecasted transaction would be reclassified into earnings immediately. See “NOTE 9: DERIVATIVES” for more information about our derivatives.
	-3	For the nine months ended September 30, 2014 and 2013, net of tax expense of $1.0 billion and $1.1 billion, respectively, for AOCI related to available-for-sale securities.
	Reclassifications from AOCI to Net Income
	The table below presents reclassifications from AOCI to net income, including the affected line item in our consolidated statements of comprehensive income.
	Table 11.2 — Reclassifications from AOCI to Net Income
	Details about Accumulated Other		Three Months Ended September 30,								Nine Months Ended September 30,							Affected Line Item in the Consolidated
	Comprehensive Income Components																	Statements of Comprehensive Income
			2014				2013				2014				2013
			(in millions)
	AOCI related to available-for-sale  securities
			$	107			$	827			$	1,212			$	1,182		Other gains (losses) on investment securities recognized in earnings
			(166		)		(126		)		(687		)		(213		)	Net impairment of available-for-sale securities recognized in earnings
			(59		)		701				525				969			Total before tax
			21				(246		)		(184		)		(339		)	Tax (expense) or benefit
			(38		)		455				341				630			Net of tax
	AOCI related to cash flow hedge relationships
			(1		)		(3		)		(2		)		(5		)	Interest expense — Other debt
			(75		)		(107		)		(230		)		(360		)	Expense related to derivatives
			(76		)		(110		)		(232		)		(365		)	Total before tax
			26				34				81				115			Tax (expense) or benefit
			(50		)		(76		)		(151		)		(250		)	Net of tax
	AOCI related to defined benefit plans
			1				(2		)		3				(6		)	Salaries and employee benefits
			—				—				(1		)		—			Tax (expense) or benefit
			1				(2		)		2				(6		)	Net of tax
	Total reclassifications in the period		$	(87	)		$	377			$	192			$	374		Net of tax
	Future Reclassifications from AOCI to Net Income Related to Closed Cash Flow Hedges
	As shown in “Table 11.1 — Changes in AOCI by Component, Net of Tax,” the total AOCI related to derivatives designated as cash flow hedges was a loss of $0.8 billion and $1.1 billion at September 30, 2014 and 2013, respectively, composed of deferred net losses on closed cash flow hedges. Closed cash flow hedges involve derivatives that have been terminated or are no longer designated as cash flow hedges. Fluctuations in prevailing market interest rates have no effect on the deferred portion of AOCI relating to losses on closed cash flow hedges.
	The previously deferred amount related to closed cash flow hedges remains in our AOCI balance and will be recognized into earnings over the expected time period for which the forecasted transactions affect earnings, unless it is deemed probable that the forecasted transactions will not occur. Over the next 12 months, we estimate that approximately $178 million, net of taxes, of the $0.8 billion of cash flow hedge losses in AOCI at September 30, 2014 will be reclassified into earnings. The maximum remaining length of time over which we have hedged the exposure related to the variability in future cash flows on forecasted transactions, primarily forecasted debt issuances, is 20 years.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
INCOME TAXES	'
	NOTE 12: INCOME TAXES
	Income Tax (Expense) Benefit
	For the three months ended September 30, 2014 and 2013, we reported an income tax (expense) benefit of $(1.0) billion and $24.0 billion, respectively, resulting in effective tax rates of 31.5% and (367.1)%, respectively. For the nine months ended September 30, 2014 and 2013, we reported an income tax (expense) benefit of $(3.4) billion and $24.0 billion, respectively, resulting in effective tax rates of 31.1% and (150.0)%, respectively. The change to income tax expense in the 2014 periods from income tax benefit in the 2013 periods results from the release of the valuation allowance in the third quarter of 2013. For the three and nine months ended September 30, 2014, our effective tax rate was different from the statutory rate of 35% primarily due to our recognition of low income housing tax credits.
	Deferred Tax Assets and Liabilities
	We had a net deferred tax asset of $18.5 billion and $22.7 billion as of September 30, 2014 and December 31, 2013, respectively. At September 30, 2014, our net deferred tax asset consisted primarily of basis differences related to derivative instruments and deferred fees. The net deferred tax asset decreased compared to December 31, 2013, primarily due to a decrease in the net operating loss carryforward as a result of taxable income estimated to be generated in 2014.
	Based on all positive and negative evidence available as of September 30, 2014, we have determined that it is more likely than not that our net deferred tax asset will be realized. Therefore, a valuation allowance is not needed.
	Unrecognized Tax Benefits and IRS Examinations
	We have evaluated all income tax positions and determined that there are no uncertain tax positions that require reserves as of September 30, 2014.
	The IRS is currently examining our income tax returns for tax years 2008 through 2011. We are currently working with the IRS to finalize the stipulation of settled issues and closing agreement for years 1998 through 2010 related to our tax accounting method for certain hedging transactions, and expect that a final decision can be entered within the next 12 months. For additional information, see “NOTE 17: LEGAL CONTINGENCIES.”
	For a discussion of our significant accounting policies related to income taxes, please see “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES" and "NOTE 12: INCOME TAXES" in our 2013 Annual Report

Segment_Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
SEGMENT REPORTING	'
	NOTE 13: SEGMENT REPORTING
	We evaluate segment performance and allocate resources based on a Segment Earnings approach, subject to the conduct of our business under the direction of the Conservator. See “NOTE 2: CONSERVATORSHIP AND RELATED MATTERS” for additional information about the conservatorship.
	We present Segment Earnings by: (a) reclassifying certain credit guarantee-related activities and investment-related activities between various line items on our GAAP consolidated statements of comprehensive income; and (b) allocating certain revenues and expenses, including certain returns on assets and funding costs, and all administrative expenses to our three reportable segments. The reclassifications are described in “NOTE 13: SEGMENT REPORTING” in our 2013 Annual Report, and the allocations are described below.
	We do not consider our assets by segment when evaluating segment performance or allocating resources. We operate our business solely in the U.S. and its territories. Therefore, we do not generate any revenue from and do not have any long-lived assets other than financial instruments in geographic locations outside of the U.S. and its territories.
	Segments
	Our operations consist of three reportable segments, which are based on the type of business activities each performs — Single-family Guarantee, Investments, and Multifamily. See “NOTE 13: SEGMENT REPORTING” in our 2013 Annual Report for a description of our reportable segments and the activities and items included in each.
	Segment Earnings
	The financial performance of our Single-family Guarantee segment is measured based on its contribution to GAAP net income (loss). Our Investments segment and Multifamily segment are measured based on each segment's contribution to GAAP comprehensive income (loss), which consists of the sum of its contribution to: (a) GAAP net income (loss); and (b) GAAP total other comprehensive income (loss), net of taxes. Taxes for the reportable segments are generally calculated by applying our corporate estimated annual effective tax rate to each segment's pre-tax income.
	The sum of Segment Earnings for each segment and the All Other category equals GAAP net income (loss). Likewise, the sum of comprehensive income (loss) for each segment and the All Other category equals GAAP comprehensive income (loss). However, the accounting principles we apply to present certain financial statement line items in Segment Earnings for our reportable segments, in particular Segment Earnings management and guarantee income and net interest income, differ significantly from those applied in preparing the comparable line items in our consolidated financial statements prepared in accordance with GAAP. Accordingly, the results of such line items differ significantly from, and should not be used as a substitute for, the comparable line items as determined in accordance with GAAP. For reconciliations of the Segment Earnings line items to the comparable line items in our consolidated financial statements prepared in accordance with GAAP, see “Table 13.2 — Segment Earnings and Reconciliation to GAAP Results.”
	In the first quarter of 2014, we revised our inter-segment allocations between the Multifamily and the Investments segments for the Multifamily segment's investment securities and held-for-sale loans. With this change, the Multifamily segment reflects the entire change in fair value of these assets in its financial results, and the Investments segment transfers the change in fair value of the derivatives associated with the Multifamily segment's investments securities and held-for-sale loans to the Multifamily segment. The purpose of this change is to better reflect the operations of the Multifamily segment on a stand-alone basis. Prior period results have been revised to conform with the current period presentation.
	Segment Adjustments
	In presenting Segment Earnings management and guarantee income and net interest income, we make adjustments to better reflect how management measures and assesses the performance of each segment and the company as a whole. These adjustments relate to amounts that are not reflected in net income (loss) as determined in accordance with GAAP. These adjustments are reversed through the segment adjustments line item within Segment Earnings, so that Segment Earnings (loss) for each segment equals GAAP net income (loss) for each segment. Segment adjustments consist of the following:
	•	We adjust our Segment Earnings management and guarantee income for the Single-family Guarantee segment to include the amortization of buy-down fees and credit delivery fees recorded in periods prior to the January 1, 2010 adoption of accounting guidance for the transfers of financial assets and the consolidation of VIEs. As of September 30, 2014, the unamortized balance of buy-down fees was $0.3 billion and the unamortized balance of credit delivery fees was $0.8 billion. We consider such fees to be part of the effective rate of the guarantee fee on guaranteed mortgage loans. These adjustments are necessary to better reflect the realization of revenue associated with guarantee contracts over the life of the underlying loans.
	•	We adjust our Segment Earnings net interest income for the Investments segment to include the amortization of cash premiums and discounts, as well as buy-up fees, on the consolidated Freddie Mac mortgage-related securities we purchase as investments. As of September 30, 2014, the unamortized balance of such premiums and discounts, net was $3.3 billion and the unamortized balance of buy-up fees was $0.4 billion. These adjustments are necessary to reflect the effective yield realized on investments in consolidated Freddie Mac mortgage-related securities purchased at a premium or discount or with buy-up fees.
	Segment Allocations
	The results of each reportable segment include directly attributable revenues and expenses. Administrative expenses that are not directly attributable to a segment are allocated to our segments using various methodologies, depending on the nature of the expense (i.e., semi-direct versus indirect). Net interest income for each segment includes allocated debt funding and hedging costs related to certain assets of each segment. The Investments segment manages the funding and interest rate risk for all business segments. In connection with this activity, the Investments segment transfers a cost to the other segments. The actual costs may vary relative to these intra-company transfers. In addition, the financial statement volatility associated with the use of derivatives to hedge certain assets outside the Investments segment is not fully allocated to other segments. These allocations do not include the effects of dividends paid on our senior preferred stock.
	The table below presents Segment Earnings by segment.
	Table 13.1 — Summary of Segment Earnings and Comprehensive Income (Loss)
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
		(in millions)
	Segment Earnings (loss), net of taxes:
	Single-family Guarantee	$	196		$	2,019		$	1,077		$	4,546
	Investments	1,440			3,902			5,060			9,051
	Multifamily	445			639			1,339			2,560
	All Other	—			23,926			(13		)	23,898
	Total Segment Earnings, net of taxes	2,081			30,486			7,463			40,055
	Net income	$	2,081		$	30,486		$	7,463		$	40,055
	Comprehensive income (loss) of segments:
	Single-family Guarantee	$	195		$	2,021		$	1,076		$	4,560
	Investments	2,259			4,335			6,953			12,016
	Multifamily	332			155			1,159			1,291
	All Other	—			23,926			(13		)	23,898
	Comprehensive income of segments	2,786			30,437			9,175			41,765
	Comprehensive income	$	2,786		$	30,437		$	9,175		$	41,765
	The table below presents detailed reconciliations between our GAAP financial statements and Segment Earnings by financial statement line item for our reportable segments and All Other.
	Table 13.2 — Segment Earnings and Reconciliation to GAAP Results
		Three Months Ended September 30, 2014
														Total Segment			Reconciliation to Consolidated Statements of									Total per
														Earnings (Loss),			Comprehensive Income									Consolidated
														Net of Tax												Statements of
																										Comprehensive
		Single-family			Investments			Multifamily			All						Reclassifications(1)			Segment			Total			Income
		Guarantee									Other									Adjustments(2)			Reconciling
																							Items
		(in millions)
	Net interest income	$	19		$	762		$	240		$	—		$	1,021		$	2,474		$	168		$	2,642		$	3,663
	(Provision) benefit for credit losses	(818		)	—			10			—			(808		)	234			—			234			(574		)
	Non-interest income (loss):
	Management and guarantee income(3)	1,341			—			65			—			1,406			(1,247		)	(75		)	(1,322		)	84
	Net impairment of available-for-sale securities recognized in earnings	—			37			—			—			37			(203		)	—			(203		)	(166		)
	Derivative gains (losses)	19			(133		)	310			—			196			(813		)	—			(813		)	(617		)
	Gains (losses) on trading securities	—			(202		)	(14		)	—			(216		)	—			—			—			(216		)
	Gains (losses) on mortgage loans	52			—			116			—			168			—			—			—			168
	Other non-interest income (loss)	351			1,594			11			—			1,956			(445		)	—			(445		)	1,511
	Non-interest expense:
	Administrative expenses	(302		)	(104		)	(66		)	—			(472		)	—			—			—			(472		)
	REO operations income (expense)	(109		)	—			6			—			(103		)	—			—			—			(103		)
	Temporary Payroll Tax Cut Continuation Act of 2011 expense	(198		)	—			—			—			(198		)	—			—			—			(198		)
	Other non-interest expense	(40		)	—			(3		)	—			(43		)	—			—			—			(43		)
	Segment adjustments(2)	(75		)	168			—			—			93			—			(93		)	(93		)	—
	Income tax expense	(44		)	(682		)	(230		)	—			(956		)	—			—			—			(956		)
	Net income	196			1,440			445			—			2,081			—			—			—			2,081
Changes in unrealized gains (losses) related to available-for-sale securities	—			769			(113		)	—			656			—			—			—			656
Changes in unrealized gains (losses) related to cash flow hedge relationships	—			50			—			—			50			—			—			—			50
Changes in defined benefit plans	(1		)	—			—			—			(1		)	—			—			—			(1		)
Total other comprehensive income (loss), net of taxes	(1		)	819			(113		)	—			705			—			—			—			705
Comprehensive income	$	195		$	2,259		$	332		$	—		$	2,786		$	—		$	—		$	—		$	2,786
	Nine Months Ended September 30, 2014
													Total Segment			Reconciliation to Consolidated Statements of									Total per
													Earnings (Loss),			Comprehensive Income									Consolidated
													Net of Tax												Statements of
																									Comprehensive
	Single-family			Investments			Multifamily			All						Reclassifications(1)			Segment			Total			Income
	Guarantee									Other									Adjustments(2)			Reconciling
																						Items
	(in millions)
Net interest income	$	(27	)	$	2,324		$	705		$	—		$	3,002		$	7,206		$	468		$	7,674		$	10,676
(Provision) benefit for credit losses	(742		)	—			52			—			(690		)	649			—			649			(41		)
Non-interest income (loss):
Management and guarantee income(3)	3,764			—			186			—			3,950			(3,473		)	(233		)	(3,706		)	244
Net impairment of available-for-sale securities recognized in earnings	—			(95		)	—			—			(95		)	(592		)	—			(592		)	(687		)
Derivative gains (losses)	(9		)	(2,745		)	507			—			(2,247		)	(2,647		)	—			(2,647		)	(4,894		)
Gains (losses) on trading securities	—			(243		)	60			—			(183		)	—			—			—			(183		)
Gains (losses) on mortgage loans	(143		)	—			526			—			383			—			—			—			383
Other non-interest income	602			8,004			143			—			8,749			(1,143		)	—			(1,143		)	7,606
Non-interest expense:
Administrative expenses	(855		)	(339		)	(199		)	—			(1,393		)	—			—			—			(1,393		)
REO operations income (expense)	(120		)	—			8			—			(112		)	—			—			—			(112		)
Temporary Payroll Tax Cut Continuation Act of 2011 expense	(563		)	—			—			—			(563		)	—			—			—			(563		)
Other non-interest expense	(159		)	(6		)	(16		)	(18		)	(199		)	—			—			—			(199		)
Segment adjustments(2)	(233		)	468			—			—			235			—			(235		)	(235		)	—
Income tax (expense) benefit	(438		)	(2,308		)	(633		)	5			(3,374		)	—			—			—			(3,374		)
Net income (loss)	1,077			5,060			1,339			(13		)	7,463			—			—			—			7,463
Changes in unrealized gains (losses) related to available-for-sale securities	—			1,742			(180		)	—			1,562			—			—			—			1,562
Changes in unrealized gains (losses) related to cash flow hedge relationships	—			151			—			—			151			—			—			—			151
Changes in defined benefit plans	(1		)	—			—			—			(1		)	—			—			—			(1		)
Total other comprehensive income (loss), net of taxes	(1		)	1,893			(180		)	—			1,712			—			—			—			1,712
Comprehensive income (loss)	$	1,076		$	6,953		$	1,159		$	(13	)	$	9,175		$	—		$	—		$	—		$	9,175
	Three Months Ended September 30, 2013
													Total Segment			Reconciliation to Consolidated Statements of									Total per
													Earnings (Loss),			Comprehensive Income									Consolidated
													Net of Tax												Statements of
																									Comprehensive
	Single-family			Investments			Multifamily			All						Reclassifications(1)			Segment			Total			Income
	Guarantee									Other									Adjustments(2)			Reconciling
																						Items
	(in millions)
Net interest income	$	203		$	883		$	321		$	—		$	1,407		$	2,600		$	269		$	2,869		$	4,276
Benefit for credit losses	885			—			28			—			913			225			—			225			1,138
Non-interest income (loss):
Management and guarantee income(3)	1,230			—			52			—			1,282			(1,058		)	(154		)	(1,212		)	70
Net impairment of available-for-sale securities recognized in earnings	—			16			(4		)	—			12			(138		)	—			(138		)	(126		)
Derivative gains (losses)	—			1,624			(615		)	—			1,009			(1,083		)	—			(1,083		)	(74		)
Gains (losses) on trading securities	—			(184		)	(23		)	—			(207		)	—			—			—			(207		)
Gains (losses) on mortgage loans	—			—			114			—			114			—			—			—			114
Other non-interest income	246			1,503			709			—			2,458			(546		)	—			(546		)	1,912
Non-interest expense:
Administrative expenses	(263		)	(133		)	(59		)	—			(455		)	—			—			—			(455		)
REO operations income (expense)	67			—			12			—			79			—			—			—			79
Temporary Payroll Tax Cut Continuation Act of 2011 expense	(150		)	—			—			—			(150		)	—			—			—			(150		)
Other non-interest expense	(45		)	—			(6		)	—			(51		)	—			—			—			(51		)
Segment adjustments(2)	(154		)	269			—			—			115			—			(115		)	(115		)	—
Income tax (expense) benefit	—			(76		)	110			23,926			23,960			—			—			—			23,960
Net income	2,019			3,902			639			23,926			30,486			—			—			—			30,486
Changes in unrealized gains (losses) related to available-for-sale securities	—			357			(484		)	—			(127		)	—			—			—			(127		)
Changes in unrealized gains (losses) related to cash flow hedge relationships	—			76			—			—			76			—			—			—			76
Changes in defined benefit plans	2			—			—			—			2			—			—			—			2
Total other comprehensive income (loss), net of taxes	2			433			(484		)	—			(49		)	—			—			—			(49		)
Comprehensive income	$	2,021		$	4,335		$	155		$	23,926		$	30,437		$	—		$	—		$	—		$	30,437
	Nine Months Ended September 30, 2013
													Total Segment			Reconciliation to Consolidated Statements of									Total per
													Earnings (Loss),			Comprehensive Income									Consolidated
													Net of Tax												Statements of
																									Comprehensive
	Single-family			Investments			Multifamily			All						Reclassifications(1)			Segment			Total			Income
	Guarantee									Other									Adjustments(2)			Reconciling
																						Items
	(in millions)
Net interest income	$	300		$	2,752		$	944		$	—		$	3,996		$	7,835		$	854		$	8,689		$	12,685
Benefit for credit losses	1,474			—			167			—			1,641			623			—			623			2,264
Non-interest income (loss):
Management and guarantee income(3)	3,771			—			147			—			3,918			(3,129		)	(596		)	(3,725		)	193
Net impairment of available-for-sale securities recognized in earnings	—			73			(15		)	—			58			(271		)	—			(271		)	(213		)
Derivative gains (losses)	—			3,235			1,550			—			4,785			(3,122		)	—			(3,122		)	1,663
Gains (losses) on trading securities	—			(1,213		)	(122		)	—			(1,335		)	—			—			—			(1,335		)
Gains (losses) on mortgage loans	—			—			(440		)	—			(440		)	—			—			—			(440		)
Other non-interest income	695			3,214			928			—			4,837			(1,936		)	—			(1,936		)	2,901
Non-interest expense:
Administrative expenses	(756		)	(377		)	(198		)	—			(1,331		)	—			—			—			(1,331		)
REO operations income (expense)	168			—			15			—			183			—			—			—			183
Temporary Payroll Tax Cut Continuation Act of 2011 expense	(366		)	—			—			—			(366		)	—			—			—			(366		)
Other non-interest expense	(139		)	(1		)	(18		)	(27		)	(185		)	—			—			—			(185		)
Segment adjustments(2)	(596		)	854			—			—			258			—			(258		)	(258		)	—
Income tax (expense) benefit	(5		)	514			(398		)	23,925			24,036			—			—			—			24,036
Net income (loss)	4,546			9,051			2,560			23,898			40,055			—			—			—			40,055
Changes in unrealized gains (losses) related to available-for-sale securities	—			2,707			(1,271		)	—			1,436			—			—			—			1,436
Changes in unrealized gains (losses) related to cash flow hedge relationships	—			250			—			—			250			—			—			—			250
Changes in defined benefit plans	14			8			2			—			24			—			—			—			24
Total other comprehensive income (loss), net of taxes	14			2,965			(1,269		)	—			1,710			—			—			—			1,710
Comprehensive income	$	4,560		$	12,016		$	1,291		$	23,898		$	41,765		$	—		$	—		$	—		$	41,765
-1	See “NOTE 13: SEGMENT REPORTING — Segment Earnings — Investment Activity-Related Reclassifications” and “— Credit Guarantee Activity-Related Reclassifications” in our 2013 Annual Report for information regarding these reclassifications.
-2	See “Segment Adjustments” for information regarding these adjustments.
-3	Management and guarantee income total per consolidated statements of comprehensive income is included in other income on our GAAP consolidated statements of comprehensive income.

Financial_Guarantees

Financial Guarantees	9 Months Ended
	Sep. 30, 2014
Guarantees [Abstract]	'
FINANCIAL GUARANTEES	'
	NOTE 14: FINANCIAL GUARANTEES
	We provide financial guarantees to securitization trusts that issue mortgage-related securities backed by single-family mortgage loans, which we consolidate. During the three and nine months ended September 30, 2014, we issued approximately $77.4 billion and $186.9 billion, respectively, compared to $98.0 billion and $362.0 billion during the three and nine months ended September 30, 2013, respectively, in UPB of Freddie Mac mortgage-related securities backed by single-family mortgage loans (excluding those backed by HFA bonds). For guarantees to consolidated securitization trusts, our exposure to these guarantees is generally the UPB of the loans recorded on our consolidated balance sheets. See "NOTE 14: FINANCIAL GUARANTEES" in our 2013 Annual Report for a description of the nature of the transactions that give rise to our financial guarantees.
	We also provide guarantees to non-consolidated securitization trusts that issue mortgage-related securities as well as in other guarantee commitments. If we are exposed to incremental credit risk by providing these guarantees, we charge a management and guarantee fee and recognize a guarantee asset, guarantee obligation, and a reserve for guarantee losses, as necessary.
	The table below presents our maximum potential exposure, our recognized liability, and the maximum remaining term of our financial guarantees that are not consolidated on our balance sheets.
	Table 14.1 — Financial Guarantees
		September 30, 2014					31-Dec-13
		Maximum		Recognized		Maximum	Maximum		Recognized		Maximum
		Exposure(1)		Liability(2)		Remaining	Exposure(1)		Liability(2)		Remaining
						Term					Term
		(dollars in millions, terms in years)
	Non-consolidated Freddie Mac securities(3)	$	81,117	$	806	39	$	71,809	$	731	40
	Other guarantee commitments	26,076		754		35	29,160		791		36
	Derivative instruments(4)	10,740		90		31	9,856		239		32
	-1	Maximum exposure represents the contractual amounts that could be lost under the non-consolidated guarantees if counterparties or borrowers defaulted, without consideration of possible recoveries under credit enhancement arrangements, such as recourse provisions, third-party insurance contracts, or from collateral held or pledged. The maximum exposure disclosed above is not representative of the actual loss we are likely to incur, based on our historical loss experience and after consideration of proceeds from related collateral liquidation. The maximum exposure for our liquidity guarantees is not mutually exclusive of our default guarantees on the same securities; therefore, these amounts are included within the maximum exposure of non-consolidated Freddie Mac securities and other guarantee commitments.
	-2	For non-consolidated Freddie Mac securities and other guarantee commitments, this amount represents the guarantee obligation on our consolidated balance sheets. This amount excludes our reserve for guarantee losses, which totaled $110 million and $111 million as of September 30, 2014 and December 31, 2013, respectively, and is included within other liabilities on our consolidated balance sheets.
	-3	In addition to our guarantee of principal and interest, we also provide liquidity guarantees for certain multifamily housing revenue bonds included in this category. However, no advances under these liquidity guarantees were outstanding at September 30, 2014 or December 31, 2013.
	-4	See “NOTE 9: DERIVATIVES” for information about these derivative guarantees.
	Non-Consolidated Freddie Mac Securities
	During the three and nine months ended September 30, 2014, we issued approximately $3.9 billion and $11.0 billion, respectively, compared to $5.3 billion and $17.5 billion during the three and nine months ended September 30, 2013, respectively, in UPB of Other Guarantee Transactions, all of which were backed by multifamily mortgage loans, for which a guarantee asset and guarantee obligation were recognized.
	For many of the loans underlying our non-consolidated guarantees, there are credit protections from third parties, including subordination, covering a portion of our exposure. See “NOTE 4: MORTGAGE LOANS AND LOAN LOSS RESERVES” for information about credit protections on loans we guarantee.
	Other Guarantee Commitments
	We provide long-term standby commitments to certain of our customers, which obligate us to purchase seriously delinquent loans that are covered by those agreements. During the nine months ended September 30, 2014 and 2013, we issued and guaranteed $2.1 billion and $8.4 billion, respectively, in UPB of long-term standby commitments. These long-term standby commitments totaled $16.5 billion and $19.2 billion in UPB at September 30, 2014 and December 31, 2013, respectively. We also had other guarantee commitments on multifamily housing revenue bonds that were issued by HFAs of $9.1 billion in UPB at both September 30, 2014 and December 31, 2013. In addition, as of September 30, 2014 and December 31, 2013, we had issued guarantees under the TCLFP on securities backed by HFA bonds with UPB of $0.4 billion and $0.9 billion, respectively.

Concentration_of_Credit_and_Ot

Concentration of Credit and Other Risks	9 Months Ended
	Sep. 30, 2014
Risks and Uncertainties [Abstract]	'
CONCENTRATION OF CREDIT AND OTHER RISKS	'
	NOTE 15: CONCENTRATION OF CREDIT AND OTHER RISKS
	Single-Family Credit Guarantee Portfolio
	Our business activity is to participate in and support the residential mortgage market in the United States, which we pursue by both issuing guaranteed mortgage securities and investing in mortgage loans and mortgage-related securities.
	The table below summarizes the concentration by year of origination and geographic area of the approximately $1.7 trillion UPB of our single-family credit guarantee portfolio at both September 30, 2014 and December 31, 2013. See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES” in our 2013 Annual Report and "NOTE 4: MORTGAGE LOANS AND LOAN LOSS RESERVES” and “NOTE 7: INVESTMENTS IN SECURITIES” for more information about credit risk associated with loans and mortgage-related securities that we hold.
	Table 15.1 — Concentration of Credit Risk — Single-Family Credit Guarantee Portfolio
		30-Sep-14					31-Dec-13						Percent of Credit Losses(1)(2 ) Nine Months Ended
		Percentage  of		Serious			Percentage  of			Serious			30-Sep-14		30-Sep-13
		Portfolio(2)(3)		Delinquency			Portfolio(2)(3)			Delinquency
				Rate						Rate
	Year of Origination
	2014	8	%	0.01	%		N/A			N/A			—	%	N/A
	2013	16		0.04			16	%		0.01	%		—		—	%
	2012	15		0.07			16			0.04			—		—
	2011	7		0.23			8			0.18			—		—
	2010	6		0.44			7			0.39			—		1
	2009	6		0.89			7			0.88			2		2
	Subtotal - New single-family book	58		0.23			54			0.24			2		3
	HARP and other relief refinance loans(4)	20		0.7			21			0.64			7		6
	2005 to 2008 Legacy single-family book	14		7.66			16			8.77			83		82
	Pre-2005 Legacy single-family book	8		3.12			9			3.24			8		9
	Total	100	%	1.96	%		100	%		2.39	%		100	%	100	%
	Region(5)
	West	29	%	1.31	%		28	%		1.73	%		13	%	27	%
	Northeast	26		2.87			26			3.23			26		13
	North Central	17		1.53			18			1.81			21		23
	Southeast	16		2.56			16			3.42			36		34
	Southwest	12		1.17			12			1.36			4		3
	Total	100	%	1.96	%		100	%		2.39	%		100	%	100	%
	State
	Arizona, California, Florida, and Nevada(6)	26	%	2.09	%		26	%		3.01	%		37	%	49	%
	Illinois, Michigan, and Ohio(7)	10		1.77			11			2.11			17		19
	New York and New Jersey(8)	9		4.69			9			5.11			10		3
	All other	55		1.57			54			1.85			36		29
	Total	100	%	1.96	%		100	%		2.39	%		100	%	100	%
	-1	Credit losses consist of the aggregate amount of charge-offs, net of recoveries, and REO operations expense in each of the respective periods and exclude foregone interest on TDRs and non-accrual loans and other market-based losses recognized on our consolidated statements of comprehensive income.
	-2	Within these columns, "—" represents less than 0.5%.
	-3	Based on the UPB of our single-family credit guarantee portfolio, which includes unsecuritized single-family mortgage loans held by us on our consolidated balance sheets and those underlying Freddie Mac mortgage-related securities, or covered by our other guarantee commitments.
	-4	HARP and other relief refinance loans are presented separately rather than in the year that the refinancing occurred (from 2009 to 2014). All other refinance loans are presented in the year that the refinancing occurred. Prior period information has been revised to conform with the current period presentation.
	-5	Region designation: West (AK, AZ, CA, GU, HI, ID, MT, NV, OR, UT, WA); Northeast (CT, DE, DC, MA, ME, MD, NH, NJ, NY, PA, RI, VT, VA, WV); North Central (IL, IN, IA, MI, MN, ND, OH, SD, WI); Southeast (AL, FL, GA, KY, MS, NC, PR, SC, TN, VI); Southwest (AR, CO, KS, LA, MO, NE, NM, OK, TX, WY).
	-6	Represents the four states that had the largest cumulative declines in home prices during the housing crisis that began in 2006, as measured using Freddie Mac’s home price index.
	-7	Represents selected states in the North Central region that have experienced adverse economic conditions since 2006.
	-8	Represents two states with a judicial foreclosure process in which there are a significant number of seriously delinquent loans within our single-family credit guarantee portfolio.
	Credit Performance of Certain Higher Risk Single-Family Loan Categories
	Participants in the mortgage market often characterize single-family loans based upon their overall credit quality at the time of origination, generally considering them to be prime or subprime. Many mortgage market participants classify single-family loans with credit characteristics that range between their prime and subprime categories as Alt-A because these loans have a combination of characteristics of each category, may be underwritten with lower or alternative income or asset documentation requirements compared to a full documentation mortgage loan, or both. However, there is no universally accepted definition of subprime or Alt-A. Although we discontinued new purchases of mortgage loans with lower documentation standards for assets or income beginning March 1, 2009, we continued to purchase certain amounts of these mortgages in cases where the loan was either: (a) purchased pursuant to a previously issued other guarantee commitment; (b) part of our relief refinance mortgage initiative; or (c) in another refinance mortgage initiative and the pre-existing mortgage (including Alt-A loans) was originated under less than full documentation standards. In the event we purchase a refinance mortgage and the original loan had been previously identified as Alt-A, such refinance loan may no longer be categorized or reported as Alt-A in the table below because the new refinance loan replacing the original loan would not be identified by the seller/servicer as an Alt-A loan. As a result, our reported Alt-A balances may be lower than would otherwise be the case had such refinancing not occurred.
	Although we do not categorize single-family mortgage loans we purchase or guarantee as prime or subprime, we recognize that there are a number of mortgage loan types with certain characteristics that indicate a higher degree of credit risk. For example, a borrower’s credit score is a useful measure for assessing the credit quality of the borrower. Statistically, borrowers with higher credit scores are more likely to repay or have the ability to refinance than those with lower scores.
	Presented below is a summary of the serious delinquency rates of certain higher-risk categories (based on characteristics of the loan at origination) of single-family loans in our single-family credit guarantee portfolio. The table includes a presentation of each higher-risk category in isolation. A single loan may fall within more than one category (for example, an interest-only loan may also have an original LTV ratio greater than 90%). Loans with a combination of these attributes will have an even higher risk of delinquency than those with an individual attribute.
	Table 15.2 — Certain Higher-Risk Categories in the Single-Family Credit Guarantee Portfolio(1)
		Percentage of Portfolio(1)					Serious Delinquency Rate
		30-Sep-14		31-Dec-13			30-Sep-14			31-Dec-13
	Interest-only	2	%	2	%		9.89	%		12.51	%
	Option ARM(2)	—		—			10.39			12.3
	Alt-A	3		3			8.81			10.06
	Original LTV ratio greater than 90%(3)	16		16			2.64			3.22
	Lower FICO scores at origination (less than 620)	3		3			8.71			9.99
	-1	Based on UPB. Excludes loans underlying certain Other Guarantee Transactions for which data was not available. Within these columns, "—" represents less than 0.5%.
	-2	For reporting purposes, loans within the option ARM category continue to be reported in that category following modification, even though the modified loan no longer provides for optional payment provisions.
	-3	Includes HARP loans, which we are required to purchase as part of our participation in the MHA Program.
	The percentage of borrowers in our single-family credit guarantee portfolio, based on UPB, with estimated current LTV ratios greater than 100% was 7% and 10% at September 30, 2014 and December 31, 2013, respectively. An increase in the estimated current LTV ratio of a loan indicates that the borrower’s equity in the home has declined, and can negatively affect the borrower’s ability to refinance (outside of HARP) or to sell the property for an amount at or above the balance of the outstanding mortgage loan. The serious delinquency rate for single-family loans with estimated current LTV ratios greater than 100% was 8.92% and 9.94% as of September 30, 2014 and December 31, 2013, respectively. Loans in our 2005-2008 Legacy single-family book have been more affected by declines in home prices during the housing crisis that began in 2006 than loans originated in other years. Our 2005-2008 Legacy single-family book comprised approximately 14% of our single-family credit guarantee portfolio, based on UPB at September 30, 2014, and these loans accounted for approximately 83% of our credit losses during the nine months ended September 30, 2014.
	We categorize our investments in non-agency mortgage-related securities as subprime, option ARM, or Alt-A if the securities were identified as such based on information provided to us when we entered into these transactions. We have not identified option ARM, CMBS, obligations of states and political subdivisions, and manufactured housing securities as either subprime or Alt-A securities. See “NOTE 7: INVESTMENTS IN SECURITIES” for further information on these categories and other concentrations in our investments in securities.
	Multifamily Mortgage Portfolio
	The table below summarizes the concentration of multifamily mortgages in our multifamily mortgage portfolio by certain attributes. Information presented for multifamily mortgage loans includes certain categories based on loan or borrower characteristics present at origination. The table includes a presentation of each category in isolation. A single loan may fall within more than one category (for example, a loan with an original LTV ratio greater than 80% may also have an original DSCR below 1.10).
	Table 15.3 — Concentration of Credit Risk — Multifamily Mortgage Portfolio
		30-Sep-14						31-Dec-13
	UPB			Delinquency			UPB				Delinquency
				Rate(1)							Rate(1)
	(dollars in billions)
State(2)
California	$	22.9		—	%		$	22.4			0.03	%
Texas	16.9			—			16.7				0.02
New York	11.2			0.11			11.4				0.12
Florida	9.4			0.05			9.3				0.28
Virginia	6.9			—			7				0.37
Maryland	6.8			—			6.7				—
All other states	61.1			0.03			59.3				0.08
Total	$	135.2		0.03	%		$	132.8			0.09	%
Region(3)
Northeast	$	37.4		0.03	%		$	37.5			0.1	%
West	35			—			33.8				0.07
Southwest	26.9			—			26.2				0.05
Southeast	24.7			0.07			24.1				0.16
North Central	11.2			0.07			11.2				0.07
Total	$	135.2		0.03	%		$	132.8			0.09	%
Other Categories(4)
Original LTV ratio greater than 80%	$	5.7		0.04	%		$	5.6			0.19	%
Original DSCR below 1.10	2.1			—			2.2				—
-1	Based on the UPB of multifamily mortgages two monthly payments or more delinquent or in foreclosure.
-2	Represents the six states with the highest UPB at September 30, 2014.
-3	See endnote (5) to “Table 15.1 — Concentration of Credit Risk — Single-Family Credit Guarantee Portfolio” for a description of these regions.
-4	These categories are not mutually exclusive and a loan in one category may also be included within another category.
One indicator of risk for mortgage loans in our multifamily mortgage portfolio is the amount of a borrower’s equity in the underlying property. A borrower’s equity in a property decreases as the LTV ratio increases. Higher LTV ratios negatively affect a borrower’s ability to refinance or sell a property for an amount at or above the balance of the outstanding mortgage. The DSCR is another indicator of future credit performance. The DSCR estimates a multifamily borrower’s ability to service its mortgage obligation using the secured property’s cash flow, after deducting non-mortgage expenses from income. The higher the DSCR, the more likely it is that a multifamily borrower will be able to continue servicing its mortgage obligation.
We estimate that the percentage of loans in our multifamily mortgage portfolio with a current LTV ratio greater than 100% was approximately 1% and 2% at September 30, 2014 and December 31, 2013, respectively, and our estimate of the current average DSCR for these loans was 1.07 and 0.95, respectively. We estimate that the percentage of loans in our multifamily mortgage portfolio with a current DSCR less than 1.0 was 2% and 3% at September 30, 2014 and December 31, 2013, respectively, and the average current LTV ratio of these loans was 87% and 95%, respectively. Our estimates of current DSCRs are based on the latest reported net operating income for these properties. Our estimates of the current LTV ratios are based on either values we receive from a third-party service provider or our internal estimates of property value. Our internal estimates of property value are primarily derived using techniques that include income capitalization and comparable sales analysis using third party market data.
Seller/Servicers
We acquire a significant portion of our single-family mortgage purchase volume from several large seller/servicers and we are exposed to the risk that we could lose purchase volume to the extent certain arrangements with these lenders are terminated. Our top 10 single-family seller/servicers provided approximately 50% of our single-family purchase volume during the nine months ended September 30, 2014. Wells Fargo Bank, N.A. accounted for 13% of our single-family mortgage purchase volume and was the only single-family seller/servicer that comprised 10% or more of our purchase volume during the nine months ended September 30, 2014.
We are exposed to institutional credit risk arising from the potential insolvency or non-performance by our seller/servicers of their obligations to repurchase mortgages or (at our option) indemnify us in the event of: (a) breaches of the representations and warranties they made when they sold the mortgages to us; or (b) failure to comply with our servicing requirements. Our contracts require that a seller/servicer repurchase a mortgage after we issue a repurchase request, unless the seller/servicer avails itself of an appeals process provided for in our contracts, in which case the deadline for repurchase is extended until we decide on the appeal. As of September 30, 2014 and December 31, 2013, the UPB of loans subject to our repurchase requests (seller and servicer related) issued to our single-family seller/servicers was approximately $0.8 billion and $2.2 billion, respectively (these figures include repurchase requests for which appeals were pending). During the three and nine months ended September 30, 2014, we recovered amounts that covered losses with respect to $0.3 billion and $1.7 billion, respectively, in UPB of loans subject to our repurchase requests.
During the nine months ended September 30, 2014, we entered into settlement agreements with certain counterparties to release specified loans from certain seller repurchase obligations in exchange for one-time cash payments, which totaled approximately $0.4 billion in aggregate. These agreements related to loans with $26.1 billion in aggregate principal amount (as of the dates of the respective agreements) and we recognized a benefit for credit losses of $0.3 billion included within our consolidated statement of comprehensive income during the nine months ended September 30, 2014 related to these agreements.
The ultimate amounts of recovery payments we receive from seller/servicers related to their repurchase obligations may be significantly less than the amount of our estimates of potential exposure to losses. Our estimate of probable incurred losses for exposure to seller/servicers for their repurchase obligations is considered in our allowance for loan losses. See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Allowance for Loan Losses and Reserve for Guarantee Losses” and "NOTE 15: CONCENTRATION OF CREDIT AND OTHER RISKS" in our 2013 Annual Report for further information.
We are also exposed to the risk that seller/servicers might fail to service mortgages in accordance with our contractual requirements, resulting in increased credit losses. For example, our seller/servicers have an active role in our loss mitigation efforts, including under the servicing alignment initiative and the MHA Program, and therefore, we have exposure to them to the extent a decline in their performance results in a failure to realize the anticipated benefits of our loss mitigation plans. Since we do not have our own servicing operation, if our servicers lack appropriate process controls, experience a failure in their controls, or experience an operating disruption in their ability to service mortgage loans, our business and financial results could be adversely affected.
A significant portion of our single-family mortgage loans are serviced by several large seller/servicers. Our top two single-family loan servicers, Wells Fargo Bank, N.A. and JPMorgan Chase Bank, N.A., serviced approximately 23% and 12%, respectively, of our single-family mortgage loans, and were the only seller/servicers that serviced more than 10% of our loans, as of September 30, 2014. In recent years, there has been a shift in our servicing from depository institutions to non-depository specialty servicers that specialize in workouts of problem loans. Some of these specialty servicers have grown rapidly in recent years and now service a large share of our loans. As of both September 30, 2014 and December 31, 2013, approximately 10% of our total single-family credit guarantee portfolio were serviced by our three largest non-depository specialty servicers. Several of these specialty servicers also service a large share of the loans underlying our investments in non-agency mortgage-related securities. As of September 30, 2014, approximately 42% of our investments in single-family non-agency mortgage-related securities, based on UPB, were serviced by subsidiaries of Ocwen Financial Corp., and this was the only specialty servicer who serviced 10% or more of our recorded investment in non-agency mortgage-related securities at that date. Specialty servicers, including subsidiaries of Ocwen Financial Corp., or Ocwen, have recently been the subject of significant adverse regulatory scrutiny from regulators, and Ocwen's credit rating has been downgraded.
As of September 30, 2014 our top three multifamily servicers, Berkadia Commercial Mortgage LLC, Wells Fargo Bank, N.A., and CBRE Capital Markets, Inc., each serviced more than 10% of our multifamily mortgage portfolio, excluding K Certificates, and together serviced approximately 38% of this portfolio.
Mortgage Insurers
We have institutional credit risk relating to the potential insolvency of, or non-performance by, mortgage insurers that insure single-family mortgages we purchase or guarantee. We evaluate the recovery and collectability from insurance policies for mortgage loans that we hold for investment as well as loans underlying our non-consolidated Freddie Mac mortgage-related securities or covered by other guarantee commitments as part of the estimate of our loan loss reserves. See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Allowance for Loan Losses and Reserve for Guarantee Losses” in our 2013 Annual Report for additional information. As of September 30, 2014, mortgage insurers provided coverage with maximum loss limits of $56.9 billion, for $225.3 billion of UPB, in connection with our single-family credit guarantee portfolio. These amounts are based on gross coverage without regard to netting of coverage that may exist to the extent an affected mortgage is covered under both primary and pool insurance. Our top four mortgage insurer counterparties, Radian Guaranty Inc., Mortgage Guaranty Insurance Corporation, United Guaranty Residential Insurance Company, and Genworth Mortgage Insurance Corporation each accounted for more than 10% and collectively represented approximately 80% of our overall mortgage insurance coverage at September 30, 2014. Of our four largest counterparties, three are rated BB-, and one is rated BBB+, as of September 30, 2014, based on the lower of the S&P or Moody’s rating scales and stated in terms of the S&P equivalent. PMI Mortgage Insurance Co. (PMI), Republic Mortgage Insurance Co. (RMIC), and Triad Guaranty Insurance Corp. (Triad) are no longer rated by either S&P or Moody’s because they are in rehabilitation or under regulatory supervision.
We received proceeds of $1.0 billion and $1.6 billion during the nine months ended September 30, 2014 and 2013, respectively, from our primary and pool mortgage insurance policies for recovery of losses on our single-family loans. We had outstanding receivables from mortgage insurers of $0.4 billion and $0.7 billion (excluding deferred payment obligations associated with unpaid claim amounts) as of September 30, 2014 and December 31, 2013, respectively. The balance of our outstanding accounts receivable from mortgage insurers, net of associated reserves, was approximately $0.3 billion and $0.5 billion at September 30, 2014 and December 31, 2013, respectively.
PMI and Triad are paying a portion of their claims in cash and the remaining portion of the claims represents a deferred payment obligation. It is not clear how the regulators of these companies will administer their respective deferred payment plans, nor when or if those obligations will be paid.
In June 2014, RMIC announced that it would: (a) resume paying valid claims at 100% of the claim amount without further deferrals, effective with claims settled on or after July 1, 2014, and (b) pay, in full, all deferred payment obligations outstanding as of June 30, 2014. In July 2014, we received RMIC's payment of all deferred payment obligations owed to us. Previously, RMIC had been paying all valid claims 60% in cash and 40% in deferred payment obligations.
See "NOTE 15: CONCENTRATION OF CREDIT AND OTHER RISKS" in our 2013 Annual Report for further information on our mortgage insurance counterparties.
Bond Insurers
Bond insurance, which may be either primary or secondary policies, is a credit enhancement covering some of the non-agency mortgage-related securities we hold. Primary policies are acquired by the securitization trust issuing the securities we purchase, while secondary policies are acquired by us. At September 30, 2014, the maximum principal exposure to credit losses related to such policies was $7.1 billion. At September 30, 2014, our top four bond insurers, Ambac Assurance Corporation (or Ambac), Financial Guaranty Insurance Company (or FGIC), National Public Finance Guarantee Corp., and MBIA Insurance Corp., each accounted for more than 10% of our overall bond insurance coverage and collectively represented approximately 92% of our total coverage.
We expect to receive substantially less than full payment of our claims from Ambac and FGIC as these companies are either insolvent or in rehabilitation. We believe that we will also likely receive substantially less than full payment of our claims from some of our other bond insurers, because we believe they also lack sufficient ability to fully meet all of their expected lifetime claims-paying obligations to us as such claims emerge. We evaluate the expected recovery from primary bond insurance policies as part of our impairment analysis for our investments in securities. See “NOTE 7: INVESTMENTS IN SECURITIES” in our 2013 Annual Report for further information on our evaluation of impairment on securities covered by bond insurance.
Cash and Other Investments Counterparties
We are exposed to institutional credit risk arising from the potential insolvency or non-performance of counterparties of non-mortgage-related investment agreements and cash equivalent transactions, including those entered into on behalf of our securitization trusts. Our policies require that the issuer be rated as investment grade at the time the financial instrument is purchased. We base the permitted term and dollar limits for each of these transactions on the counterparty's financial strength in order to further mitigate our risk.
Our cash and other investment counterparties are primarily major institutions, Treasury, and the Federal Reserve Bank of New York. As of September 30, 2014 and December 31, 2013, including amounts related to our consolidated VIEs, there were $52.4 billion and $85.9 billion, respectively, of: (a) cash and securities purchased under agreements to resell invested with institutional counterparties; (b) Treasury securities classified as cash equivalents; or (c) cash deposited with the Federal Reserve Bank of New York. As of September 30, 2014 these included:
•	$20.9 billion of securities purchased under agreements to resell with 14 counterparties that had short-term S&P ratings of A-1 or above;
•	$0.6 billion of securities purchased under agreements to resell with one counterparty that had a short-term S&P rating of A-2;
•	$8.5 billion of securities purchased under agreements to resell with three counterparties that do not have short-term S&P or other third-party credit ratings, but were evaluated under the company's counterparty credit risk system and were determined to be eligible for these transactions (by providing more than 100% in approved collateral);
•	$0.4 billion of cash equivalents invested in Treasury securities; and
•	$21.9 billion of cash deposited with the Federal Reserve Bank of New York (as a non-interest-bearing deposit).
Non-Agency Mortgage-Related Security Issuers
We are engaged in various loss mitigation efforts concerning certain investments in non-agency mortgage-related securities, including the activities discussed below. The effectiveness of these various loss mitigation efforts is uncertain, in part because our rights as an investor are limited, and any potential recoveries may take significant time to realize. Lawsuits against a number of parties are currently pending. These parties include some of our significant seller/servicers and counterparties, including counterparties to debt funding and derivatives transactions.
In 2011, FHFA, as Conservator for Freddie Mac and Fannie Mae, filed lawsuits against 18 corporate families of financial institutions and related defendants alleging securities laws violations and, in some cases, fraud. These lawsuits seek to recover losses and damages sustained by Freddie Mac and Fannie Mae as a result of their investments in certain residential non-agency mortgage-related securities issued or sold by, or backed by mortgages originated by, these financial institutions or control persons thereof. As of September 30, 2014, most of these lawsuits have been resolved through settlements. We and FHFA reached settlements with the following parties in these FHFA-filed lawsuits in the nine months ended September 30, 2014:
•	Morgan Stanley (February 2014)
•	Societe Generale (February 2014)
•	Credit Suisse Holdings (USA), Inc. (March 2014)
•	Bank of America Corporation (March 2014)
•	Barclays Bank PLC (April 2014)
•	First Horizon National Corporation (April 2014)
•	RBS Securities, Inc. (June 2014); resolved claims against RBS in FHFA's lawsuit against Ally Financial Inc.
•	Goldman Sachs and Co. (August 2014)
•	HSBC North America Holdings, Inc. (September 2014)
At the direction of our Conservator, we are also working to enforce contractual rights of certain trusts with respect to the non-agency mortgage-related securities we hold, and have directed certain trustees to initiate litigation on behalf of certificate holders against several financial institutions for breach of contract claims. We reached a settlement with WMC Mortgage LLC in March 2014.
During the nine months ended September 30, 2014, we recognized $6.1 billion within non-interest income on our consolidated statements of comprehensive income from the settlements discussed above.
We have also been participating with other investors in non-agency mortgage-related securities in certain investor consortiums that seek to enforce certain claims relating to such securities. In April 2014, Citigroup Inc. announced a settlement with an investor consortium to resolve certain claims with respect to a number of mortgage securitization trusts. The settlement is subject to various conditions, and it is not possible to predict the timing or ultimate outcome of the approval process, which could take substantial time. We have investments in certain of these securitization trusts and would expect to benefit from this settlement, if it is ultimately approved. For more information, see “NOTE 15: CONCENTRATION OF CREDIT AND OTHER RISKS — Non-Agency Mortgage-Related Security Issuers” in our 2013 Annual Report.
In November 2013, J.P. Morgan Chase & Co. announced a settlement with an investor consortium to resolve certain claims with respect to a number of mortgage securitization trusts in which we have investments. In October 2014, the trustees of the securitizations filed suit in New York state court seeking approval of the settlement. If the settlement is approved, Freddie Mac would expect to receive a benefit from this settlement for those covered securitizations that Freddie Mac holds at the time settlement proceeds are distributed to the trusts. Freddie Mac would expect to similarly benefit from other outstanding investor consortium settlements with respect to mortgage securitization trusts in which we have investments, to the extent such settlements are approved.
See "Seller/Servicers" for information about specialty servicers that service mortgage loans underlying our non-agency mortgage-related securities.
Derivative Portfolio
For a discussion of our derivative counterparties as well as related master netting and collateral agreements, see “NOTE 10: COLLATERAL AND OFFSETTING OF ASSETS AND LIABILITIES.”

Fair_Value_Disclosures

Fair Value Disclosures	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
FAIR VALUE DISCLOSURES	'
	NOTE 16: FAIR VALUE DISCLOSURES
	The accounting guidance for fair value measurements and disclosures defines fair value, establishes a framework for measuring fair value, and sets forth disclosure requirements regarding fair value measurements. This guidance applies whenever other accounting guidance requires or permits assets or liabilities to be measured at fair value. Fair value measurement assumes that the transaction to sell the asset or transfer the liability takes place either in the principal market for the asset or liability, or, in the absence of a principal market, in the most advantageous market for the asset or liability.
	We use fair value measurements for the initial recording of certain assets and liabilities and periodic remeasurement of certain assets and liabilities on a recurring or non-recurring basis.
	Fair Value Measurements
	The accounting guidance for fair value measurements and disclosures establishes a three-level fair value hierarchy that prioritizes the inputs into the valuation techniques used to measure fair value. The fair value hierarchy gives the highest priority, Level 1, to measurements based on quoted prices in active markets for identical assets or liabilities. The next highest priority, Level 2, is given to measurements based on observable inputs other than quoted prices in active markets for identical assets or liabilities. The lowest priority, Level 3, is given to measurements based on unobservable inputs. Assets and liabilities are classified in their entirety within the fair value hierarchy based on the lowest level input that is significant to the fair value measurement.
	Assets and Liabilities on Our Consolidated Balance Sheets Measured at Fair Value on a Recurring Basis
	The table below presents our assets and liabilities measured on our consolidated balance sheets at fair value on a recurring basis subsequent to initial recognition, including instruments where we have elected the fair value option, as of September 30, 2014 and December 31, 2013.
	Table 16.1 — Assets and Liabilities on Our Consolidated Balance Sheets Measured at Fair Value on a Recurring Basis
		September 30, 2014
		Level 1			Level 2			Level 3			Netting				Total
											Adjustment(1)
		(in millions)
	Assets:
	Investments in securities:
	Available-for-sale, at fair value:
	Mortgage-related securities:
	Freddie Mac	$	—		$	37,057		$	4,306		$	—			$	41,363
	Fannie Mae	—			10,420			106			—				10,526
	Ginnie Mae	—			206			4			—				210
	CMBS	—			20,262			3,352			—				23,614
	Subprime	—			—			22,701			—				22,701
	Option ARM	—			—			5,707			—				5,707
	Alt-A and other	—			—			5,513			—				5,513
	Obligations of states and political subdivisions	—			—			2,493			—				2,493
	Manufactured housing	—			—			650			—				650
	Total available-for-sale securities, at fair value	—			67,945			44,832			—				112,777
	Trading, at fair value:
	Mortgage-related securities:
	Freddie Mac	—			14,005			895			—				14,900
	Fannie Mae	—			6,061			177			—				6,238
	Ginnie Mae	—			17			—			—				17
	Other	—			116			4			—				120
	Total mortgage-related securities	—			20,199			1,076			—				21,275
	U.S. Treasury securities	9,159			—			—			—				9,159
	Total trading securities, at fair value	9,159			20,199			1,076			—				30,434
	Total investments in securities	9,159			88,144			45,908			—				143,211
	Mortgage loans:
	Held-for-sale, at fair value	—			7,719			—			—				7,719
	Derivative assets, net:
	Interest-rate swaps	—			5,910			—			—				5,910
	Option-based derivatives	—			3,055			—			—				3,055
	Other	—			66			36			—				102
	Subtotal, before netting adjustments	—			9,031			36			—				9,067
	Netting adjustments(1)	—			—			—			(8,170		)		(8,170		)
	Total derivative assets, net	—			9,031			36			(8,170		)		897
	Other assets:
	Guarantee asset, at fair value	—			—			1,570			—				1,570
	All other, at fair value	—			—			8			—				8
	Total other assets	—			—			1,578			—				1,578
	Total assets carried at fair value on a recurring basis	$	9,159		$	104,894		$	47,522		$	(8,170	)		$	153,405
	Liabilities:
	Debt securities of consolidated trusts held by third parties, at fair value	$	—		$	45		$	—		$	—			$	45
	Other debt, at fair value	—			4,988			—			—				4,988
	Derivative liabilities, net:
	Interest-rate swaps	—			10,259			—			—				10,259
	Option-based derivatives	—			59			—			—				59
	Other	—			66			47			—				113
	Subtotal, before netting adjustments	—			10,384			47			—				10,431
	Netting adjustments(1)	—			—			—			(8,501		)		(8,501		)
	Total derivative liabilities, net	—			10,384			47			(8,501		)		1,930
	Total liabilities carried at fair value on a recurring basis	$	—		$	15,417		$	47		$	(8,501	)		$	6,963
		Fair Value at December 31, 2013
		Level 1			Level 2			Level 3			Netting				Total
Adjustment(1)
	(in millions)
Assets:
Investments in securities:
Available-for-sale, at fair value:
Mortgage-related securities:
Freddie Mac	$	—		$	38,720		$	1,939		$	—			$	40,659
Fannie Mae	—			10,666			131			—				10,797
Ginnie Mae	—			155			12			—				167
CMBS	—			27,229			3,109			—				30,338
Subprime	—			—			27,499			—				27,499
Option ARM	—			—			6,574			—				6,574
Alt-A and other	—			—			8,706			—				8,706
Obligations of states and political subdivisions	—			—			3,495			—				3,495
Manufactured housing	—			—			684			—				684
Total available-for-sale securities, at fair value	—			76,770			52,149			—				128,919
Trading, at fair value:
Mortgage-related securities:
Freddie Mac	—			9,006			343			—				9,349
Fannie Mae	—			6,959			221			—				7,180
Ginnie Mae	—			24			74			—				98
Other	—			133			8			—				141
Total mortgage-related securities	—			16,122			646			—				16,768
U.S. Treasury securities	6,636			—			—			—				6,636
Total trading securities, at fair value	6,636			16,122			646			—				23,404
Total investments in securities	6,636			92,892			52,795			—				152,323
Mortgage loans:
Held-for-sale, at fair value	—			8,727			—			—				8,727
Derivative assets, net:
Interest-rate swaps	—			10,009			10			—				10,019
Option-based derivatives	—			4,112			—			—				4,112
Other	—			99			1			—				100
Subtotal, before netting adjustments	—			14,220			11			—				14,231
Netting adjustments(1)	—			—			—			(13,168		)		(13,168		)
Total derivative assets, net	—			14,220			11			(13,168		)		1,063
Other assets:
Guarantee asset, at fair value	—			—			1,611			—				1,611
All other, at fair value	—			—			9			—				9
Total other assets	—			—			1,620			—				1,620
Total assets carried at fair value on a recurring basis	$	6,636		$	115,839		$	54,426		$	(13,168	)		$	163,733
Liabilities:
Debt securities of consolidated trusts held by third parties, at fair value	$	—		$	59		$	—		$	—			$	59
Other debt, at fair value	—			1,155			1,528			—				2,683
Derivative liabilities, net:
Interest-rate swaps	—			13,022			295			—				13,317
Option-based derivatives	—			201			3			—				204
Other	—			68			38			—				106
Subtotal, before netting adjustments	—			13,291			336			—				13,627
Netting adjustments(1)	—			—			—			(13,447		)		(13,447		)
Total derivative liabilities, net	—			13,291			336			(13,447		)		180
Total liabilities carried at fair value on a recurring basis	$	—		$	14,505		$	1,864		$	(13,447	)		$	2,922
-1	Represents counterparty netting, cash collateral netting and net derivative interest receivable or payable. The net cash collateral posted was $1.0 billion and $871 million, respectively, at September 30, 2014 and December 31, 2013. The net interest receivable (payable) of derivative assets and derivative liabilities was $(0.7) billion and $(0.6) billion at September 30, 2014 and December 31, 2013, respectively, which was mainly related to interest rate swaps.
Changes in Fair Value Levels
We monitor the availability of observable market data to: (a) assess the appropriate classification of financial instruments within the fair value hierarchy; and (b) transfer assets and liabilities between Level 1, Level 2, and Level 3 accordingly. Observable market data includes, but is not limited to, quoted prices and market transactions. Changes in economic conditions or the volume and level of activity in a market generally will drive changes in availability of observable market data. Changes in availability of observable market data, which also may result in changing the valuation technique used, are generally the cause of transfers between Level 1, 2, or 3.
For both the three and nine months ended September 30, 2014 and 2013, our transfers between Level 1 and Level 2 assets and liabilities were less than $1 million.
The table below presents a reconciliation of all assets and liabilities measured on our consolidated balance sheets at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and nine months ended September 30, 2014 and 2013, including transfers into and out of Level 3 assets and liabilities. The table also presents gains and losses due to changes in fair value, including both realized and unrealized gains and losses, recognized in our consolidated statements of comprehensive income for Level 3 assets and liabilities for the three and nine months ended September 30, 2014 and 2013. When assets and liabilities are transferred between levels, we recognize the transfer as of the beginning of the period.
Table 16.2 — Assets and Liabilities on Our Consolidated Balance Sheets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs
	Three Months Ended September 30, 2014
				Realized and unrealized gains (losses)
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	June 30,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		gains (losses)
	2014						comprehensive																		Level 3(5)		Level 3(5)			2014		still held(6)
							income(1)
	(in millions)
Assets
Investments in securities:
Available-for-sale, at fair value:
Mortgage-related securities:
Freddie Mac	$	2,892		$	3		$	1		$	4			$	4,364		$	—	$	(2,077	)	$	(34	)	$	—	$	(843	)	$	4,306	$	—
Fannie Mae	136			—			(1		)	(1		)		—			—		—			(4		)	45		(70		)	106		—
Ginnie Mae	5			—			—			—				—			—		—			(1		)	—		—			4		—
CMBS	3,326			—			41			41				—			—		—			(15		)	—		—			3,352		—
Subprime	24,291			(53		)	1,068			1,015				—			—		(2,423		)	(182		)	—		—			22,701		(125		)
Option ARM	6,231			(12		)	172			160				—			—		(616		)	(68		)	—		—			5,707		(39		)
Alt-A and other	6,454			(85		)	96			11				—			—		(1,021		)	69			—		—			5,513		(2		)
Obligations of states and political subdivisions	2,898			—			(1		)	(1		)		—			—		—			(404		)	—		—			2,493		—
Manufactured housing	668			—			—			—				—			—		—			(18		)	—		—			650		—
Total available-for-sale mortgage-related securities	46,901			(147		)	1,376			1,229				4,364			—		(6,137		)	(657		)	45		(913		)	44,832		(166		)
Trading, at fair value:
Mortgage-related securities:
Freddie Mac	1,252			41			—			41				915			7		(443		)	(13		)	—		(864		)	895		42
Fannie Mae	167			(2		)	—			(2		)		—			—		—			(3		)	15		—			177		(2		)
Ginnie Mae	—			—			—			—				—			—		—			—			—		—			—		—
Other	6			—			—			—				—			—		—			(2		)	—		—			4		—
Total trading mortgage-related securities	1,425			39			—			39				915			7		(443		)	(18		)	15		(864		)	1,076		40
Other assets:
Guarantee asset(7)	1,587			(41		)	—			(41		)		—			142		—			(118		)	—		—			1,570		(41		)
All other, at fair value	12			(4		)	—			(4		)		—			—		—			—			—		—			8		(4		)
Total other assets	1,599			(45		)	—			(45		)		—			142		—			(118		)	—		—			1,578		(45		)
				Realized and unrealized (gains) losses
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	June 30,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		(gains)
	2014						comprehensive																		Level 3(5)		Level 3(5)			2014		losses
							income(1)																									still held(6)
	(in millions)
Liabilities
Other debt, at fair value	$	1,000		$	—		$	—		$	—			$	—		$	—	$	—		$	(1,000	)	$	—	$	—		$	—	$	—
Net derivatives(8)	58			(66		)	—			(66		)		—			—		—			19			—		—			11		(49		)
	Nine Months Ended September 30, 2014
				Realized and unrealized gains (losses)
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	January 1,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		gains (losses)
	2014						comprehensive																		Level 3(5)		Level 3(5)			2014		still held(6)
							income(1)
	(in millions)
Assets
Investments in securities:
Available-for-sale, at fair value:
Mortgage-related securities:
Freddie Mac	$	1,939		$	1		$	3		$	4			$	5,567		$	—	$	(3,086	)	$	(79	)	$	3	$	(42	)	$	4,306	$	—
Fannie Mae	131			—			(4		)	(4		)		48			—		(55		)	(15		)	1		—			106		—
Ginnie Mae	12			—			—			—				—			—		(6		)	(3		)	1		—			4		—
CMBS	3,109			—			269			269				—			—		—			(26		)	—		—			3,352		—
Subprime	27,499			(456		)	2,556			2,100				—			—		(5,628		)	(1,270		)	—		—			22,701		(582		)
Option ARM	6,574			(41		)	174			133				—			—		(791		)	(209		)	—		—			5,707		(72		)
Alt-A and other	8,706			86			232			318				—			—		(3,409		)	(102		)	—		—			5,513		(33		)
Obligations of states and political subdivisions	3,495			1			71			72				1			—		(13		)	(1,062		)	—		—			2,493		—
Manufactured housing	684			—			21			21				—			—		—			(55		)	—		—			650		—
Total available-for-sale mortgage-related securities	52,149			(409		)	3,322			2,913				5,616			—		(12,988		)	(2,821		)	5		(42		)	44,832		(687		)
Trading, at fair value:
Mortgage-related securities:
Freddie Mac	343			26			—			26				2,064			42		(1,480		)	(33		)	—		(67		)	895		30
Fannie Mae	221			(20		)	—			(20		)		14			—		—			(7		)	—		(31		)	177		(20		)
Ginnie Mae	74			—			—			—				—			—		(70		)	(4		)	—		—			—		(2		)
Other	8			(1		)	—			(1		)		—			—		—			(3		)	—		—			4		(1		)
Total trading mortgage-related securities	646			5			—			5				2,078			42		(1,550		)	(47		)	—		(98		)	1,076		7
Other assets:
Guarantee asset(7)	1,611			(146		)	—			(146		)		—			290		—			(185		)	—		—			1,570		(145		)
All other, at fair value	9			(1		)	—			(1		)		—			—		—			—			—		—			8		(1		)
Total other assets	1,620			(147		)	—			(147		)		—			290		—			(185		)	—		—			1,578		(146		)
				Realized and unrealized (gains) losses
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	January 1,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		(gains)
	2014						comprehensive																		Level 3(5)		Level 3(5)			2014		losses
							income(1)																									still held(6)
	(in millions)
Liabilities
Other debt, at fair value	$	1,528		$	(7	)	$	—		$	(7	)		$	—		$	—	$	—		$	(1,521	)	$	—	$	—		$	—	$	—
Net derivatives(8)	325			(95		)	—			(95		)		—			—		—			62			—		(281		)	11		(30		)
	Three Months Ended September 30, 2013
				Realized and unrealized gains (losses)
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	June 30,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		gains (losses)
	2013						comprehensive																		Level 3		Level 3			2013		still held(6)
							income(1)
	(in millions)
Assets
Investments in securities:
Available-for-sale, at fair value:
Mortgage-related securities:
Freddie Mac	$	2,325		$	—		$	122		$	122			$	1,781		$	—	$	—		$	(67	)	$	—	$	(575	)	$	3,586	$	—
Fannie Mae	143			—			(1		)	(1		)		—			—		—			(5		)	—		—			137		—
Ginnie Mae	14			—			—			—				—			—		—			(1		)	—		—			13		—
CMBS	3,239			—			(40		)	(40		)		—			—		—			(5		)	—		—			3,194		—
Subprime	28,004			(46		)	639			593				—			—		(46		)	(979		)	—		—			27,572		(45		)
Option ARM	6,636			(16		)	20			4				—			—		(38		)	(178		)	—		—			6,424		(12		)
Alt-A and other	10,055			(73		)	353			280				—			—		(826		)	(406		)	—		—			9,103		(65		)
Obligations of states and political subdivisions	4,281			—			(51		)	(51		)		—			—		(7		)	(462		)	—		—			3,761		—
Manufactured housing	681			—			28			28				—			—		—			(21		)	—		—			688		—
Total available-for-sale mortgage-related securities	55,378			(135		)	1,070			935				1,781			—		(917		)	(2,124		)	—		(575		)	54,478		(122		)
Trading, at fair value:
Mortgage-related securities:
Freddie Mac	597			9			—			9				1,360			—		(335		)	(5		)	—		(319		)	1,307		5
Fannie Mae	188			(8		)	—			(8		)		—			—		—			(4		)	—		—			176		(8		)
Ginnie Mae	81			—			—			—				—			—		—			(3		)	—		—			78		—
Other	9			—			—			—				—			—		—			(1		)	—		—			8		—
Total trading mortgage-related securities	875			1			—			1				1,360			—		(335		)	(13		)	—		(319		)	1,569		(3		)
Mortgage loans:
Held-for-sale, at fair value	11,696			—			—			—				—			—		—			—			—		(11,696		)	—		—
Other assets:
Guarantee asset(7)	1,289			14			—			14				—			156		—			(27		)	—		—			1,432		14
All other, at fair value	8			2			—			2				—			—		—			—			—		—			10		2
Total other assets	1,297			16			—			16				—			156		—			(27		)	—		—			1,442		16
				Realized and unrealized (gains) losses
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	June 30,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		(gains) losses
	2013						comprehensive																		Level 3		Level 3			2013		still held(6)
							income(1)
	(in millions)
Liabilities
Other debt, at fair value	$	1,508		$	31		$	—		$	31			$	—		$	500	$	—		$	(8	)	$	—	$	—		$	2,031	$	31
Net derivatives(8)	343			(96		)	—			(96		)		—			2		—			2			—		(2		)	249		(84		)
	Nine Months Ended September 30, 2013
				Realized and unrealized gains (losses)
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	January 1,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		gains (losses)
	2013						comprehensive																		Level 3		Level 3			2013		still held(6)
							income(1)
	(in millions)
Assets
Investments in securities:
Available-for-sale, at fair value:
Mortgage-related securities:
Freddie Mac	$	1,802		$	—		$	113		$	113			$	1,780		$	—	$	—		$	(109	)	$	—	$	—		$	3,586	$	—
Fannie Mae	163			—			(3		)	(3		)		—			—		—			(23		)	—		—			137		—
Ginnie Mae	16			—			—			—				—			—		—			(3		)	—		—			13		—
CMBS	3,429			—			(216		)	(216		)		—			—		—			(19		)	—		—			3,194		—
Subprime	26,457			(94		)	4,632			4,538				—			—		(346		)	(3,077		)	—		—			27,572		(91		)
Option ARM	5,717			(21		)	1,346			1,325				—			—		(38		)	(580		)	—		—			6,424		(17		)
Alt-A and other	10,904			(52		)	980			928				—			—		(1,572		)	(1,157		)	—		—			9,103		(91		)
Obligations of states and political subdivisions	5,798			13			(173		)	(160		)		(10		)	—		(533		)	(1,334		)	—		—			3,761		—
Manufactured housing	709			(1		)	46			45				—			—		—			(66		)	—		—			688		(1		)
Total available-for-sale mortgage-related securities	54,995			(155		)	6,725			6,570				1,770			—		(2,489		)	(6,368		)	—		—			54,478		(200		)
Trading, at fair value:
Mortgage-related securities:
Freddie Mac	1,165			(51		)	—			(51		)		1,177			229		(360		)	(37		)	—		(816		)	1,307		(54		)
Fannie Mae	312			(57		)	—			(57		)		2			—		(2		)	(12		)	—		(67		)	176		(57		)
Ginnie Mae	92			(1		)	—			(1		)		3			—		—			(12		)	—		(4		)	78		(1		)
Other	21			—			—			—				—			—		—			(3		)	—		(10		)	8		—
Total trading mortgage-related securities	1,590			(109		)	—			(109		)		1,182			229		(362		)	(64		)	—		(897		)	1,569		(112		)
Mortgage loans:
Held-for-sale, at fair value	14,238			—			—			—				—			—		—			—			—		(14,238		)	—		—
Other assets:
Guarantee asset(7)	1,029			(2		)	—			(2		)		—			484		—			(79		)	—		—			1,432		(2		)
All other, at fair value	114			31			—			31				—			—		(135		)	—			—		—			10		8
Total other assets	1,143			29			—			29				—			484		(135		)	(79		)	—		—			1,442		6
				Realized and unrealized (gains) losses
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	January 1,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		(gains) losses
	2013						comprehensive																		Level 3		Level 3			2013		still held(6)
							income(1)
	(in millions)
Liabilities
Other debt, at fair value	$	2,187		$	23		$	—		$	23			$	—		$	500	$	—		$	(679	)	$	—	$	—		$	2,031	$	(15	)
Net derivatives(8)	47			232			—			232				—			6		—			(36		)	—		—			249		200
-1	Changes in fair value for available-for-sale securities are recorded in AOCI, while gains and losses from sales are recorded in other gains (losses) on investment securities recognized in earnings on our consolidated statements of comprehensive income. For mortgage-related securities classified as trading, the realized and unrealized gains (losses) are recorded in other gains (losses) on investment securities recognized in earnings on our consolidated statements of comprehensive income.
-2	Changes in fair value of derivatives not designated as accounting hedges are recorded in derivative gains (losses) on our consolidated statements of comprehensive income.
-3	Changes in fair value of the guarantee asset are recorded in other income on our consolidated statements of comprehensive income.
-4	For held-for-sale mortgage loans with the fair value option elected, gains (losses) on fair value changes and from sales of mortgage loans are recorded in other income on our consolidated statements of comprehensive income.
-5	Transfers out of Level 3 during the three and nine months ended September 30, 2014 consist primarily of certain mortgage-related securities and certain derivatives due to an increased volume and level of activity in the market and availability of price quotes from dealers and third-party pricing services. Transfers into Level 3 during the three and nine months ended September 30, 2014 consist primarily of certain mortgage-related securities due to a lack of relevant price quotes from dealers and third-party pricing services.
-6	Represents the amount of total gains or losses for the period, included in earnings, attributable to the change in unrealized gains and losses related to assets and liabilities classified as Level 3 that were still held at September 30, 2014 and 2013, respectively. Included in these amounts are other-than-temporary impairments recorded on available-for-sale securities.
-7	We estimate that all amounts recorded for unrealized gains and losses on our guarantee asset relate to those guarantee asset amounts still recorded on our balance sheet. The amounts reflected as included in earnings represent the periodic fair value changes of our guarantee asset.
-8	Net derivatives include derivative assets and derivative liabilities prior to counterparty netting, cash collateral netting, net trade/settle receivable or payable and net derivative interest receivable or payable.
Assets on Our Consolidated Balance Sheets Measured at Fair Value on a Non-Recurring Basis
We may be required, from time to time, to measure certain assets at fair value on a non-recurring basis after our initial recognition. These adjustments usually result from the application of lower-of-cost-or-fair-value accounting or measurement of impairment based on the fair value of the underlying collateral. These assets include impaired held-for-investment single-family and multifamily mortgage loans and REO, net.
The table below presents assets measured on our consolidated balance sheets at fair value on a non-recurring basis at September 30, 2014 and December 31, 2013, respectively.
Table 16.3 — Assets on Our Consolidated Balance Sheets Measured at Fair Value on a Non-Recurring Basis
	September 30, 2014													31-Dec-13
	Level 1			Level 2			Level 3			Total				Level 1			Level 2		Level 3			Total
	(in millions)
Assets measured at fair value on a non-recurring basis:
Mortgage loans:(1)	$	—		$	—		$	9,265		$	9,265			$	—		$	—	$	515		$	515
REO, net(2)	—			—			1,259			1,259				—			—		1,837			1,837
Total assets measured at fair value on a non-recurring basis	$	—		$	—		$	10,524		$	10,524			$	—		$	—	$	2,352		$	2,352
-1	These loans include impaired single-family and multifamily mortgage loans that are classified as held-for-investment and have a related valuation allowance based on the fair value of the underlying collateral.
-2	Represents the fair value and related losses of foreclosed properties that were measured at fair value subsequent to their initial classification as REO, net. The carrying amount of REO, net was written down to fair value of $1.3 billion, less estimated costs to sell of $83 million (or approximately $1.2 billion) at September 30, 2014. The carrying amount of REO, net was written down to fair value of $1.8 billion, less estimated costs to sell of $118 million (or approximately $1.7 billion) at December 31, 2013.
Valuation Processes and Controls Over Fair Value Measurement
We designed our control processes so that our fair value measurements are appropriate and reliable, that they are based on observable inputs where possible, and that our valuation approaches are consistently applied and the assumptions and inputs are reasonable. Our control processes provide a framework for segregation of duties and oversight of our fair value methodologies, techniques, validation procedures, and results.
Groups within our Finance division, independent of our business functions, execute and validate the valuation processes and are responsible for determining the fair values of the majority of our financial assets and liabilities. In determining fair value, we consider the credit risk of our counterparties in estimating the fair values of our assets and our own credit risk in estimating the fair values of our liabilities. The fair values determined by our Finance division are further verified by an independent group within our Enterprise Risk Management (ERM) division.
The validation procedures performed by ERM are intended to ensure that the prices we receive from third parties are consistent with our observations of market activity, and that fair value measurements developed using internal data reflect the assumptions that a market participant would use in pricing our assets and liabilities. These validation procedures include performing a monthly independent verification of fair value measurements through independent modeling, analytics, and comparisons to other market source data, if available. Where applicable, prices are back-tested by comparing actual settlement prices to our fair value measurements. Analytical procedures include automated checks consisting of prior-period variance analysis, comparisons of actual prices to internally calculated expected prices based on observable market changes, analysis of changes in pricing ranges, relative value comparisons, and comparisons using modeled yields. Thresholds are set for each product category by ERM to identify exceptions that require further analysis. If a price is outside of our established thresholds, we perform additional validation procedures, including supplemental analytics and/or follow up discussions with the third-party provider. If we are unable to validate the reasonableness of a given price, we ultimately do not use that price for fair value measurements in our consolidated financial statements. These reviews are risk-based, cover all product categories, and are executed before we finalize the prices used in preparing our fair value measurements for our financial statements.
In addition to performing the validation procedures noted above, ERM provides independent risk governance over all valuation processes by establishing and maintaining a corporate-wide valuation control policy. ERM also independently reviews key judgments, methodologies, and valuation techniques to ensure compliance with established policies.
Our Valuation & Finance Model Committee (“Valuation Committee”), which includes representation from our business areas, ERM, and Finance divisions, provides senior management’s governance over valuation processes, methodologies, controls and fair value measurements. Identified exceptions are reviewed and resolved through the verification process and reviewed at the Valuation Committee.
Where models are employed to assist in the measurement and verification of fair values, changes made to those models during the period are reviewed and approved according to the corporate model change governance process, with all material changes reviewed at the Valuation Committee. Inputs used by models are regularly updated for changes in the underlying data, assumptions, valuation inputs, and market conditions, and are subject to the valuation controls noted above.
Use of Third-Party Pricing Data in Fair Value Measurement
As discussed in the sections that follow, many of our valuation techniques use, either directly or indirectly, data provided by third-party pricing services or dealers. The techniques used by these pricing services and dealers to develop the prices generally are either: (a) a comparison to transactions involving instruments with similar collateral and risk profiles, adjusted as necessary based on specific characteristics of the asset or liability being valued; or (b) industry-standard modeling, such as a discounted cash flow model. The prices provided by the pricing services and dealers reflect their observations and assumptions related to market activity, including risk premiums and liquidity adjustments. The models and related assumptions used by the pricing services and dealers are owned and managed by them and, in many cases, the significant inputs used in the valuation techniques are not reasonably available to us. However, we have an understanding of the processes and assumptions used to develop the prices based on our ongoing due diligence, which includes discussions with our vendors at least annually and often more frequently. We believe that the procedures executed by the pricing services and dealers, combined with our internal verification and analytical procedures, provide assurance that the prices used in our financial statements comply with the accounting guidance for fair value measurements and disclosures and reflect the assumptions that a market participant would use in pricing our assets and liabilities. The price quotes we receive are non-binding both to us and to our counterparties.
In many cases, we receive prices from third-party pricing services or dealers and use those prices without adjustment. For a large majority of the assets and liabilities we value using pricing services and dealers, we obtain prices from multiple external sources and use the median of the prices to measure fair value. This technique is referred to below as “median of external sources.” The significant inputs used in the fair value measurement of assets and liabilities that are valued using the median of external sources pricing technique are the third-party prices. Significant increases (decreases) in any of the third-party prices in isolation may result in a significantly higher (lower) fair value measurement. In limited circumstances, we may be able to receive pricing information from only a single external source. This technique is referred to below as “single external source.”
In limited circumstances, we receive prices or pricing-related data that we adjust or use as an input to our models or other valuation techniques to measure fair value, as described in “Valuation Techniques for Assets and Liabilities Measured on Our Consolidated Balance Sheets at Fair Value — Derivative Assets, Net and Derivative Liabilities, Net.” In other limited circumstances, we receive prices from a third-party provider and use those prices without adjustment, but the inputs used by the third-party provider to develop the prices are reasonably available to us, as described in “Valuation Techniques for Assets and Liabilities Measured on Our Consolidated Balance Sheets at Fair Value — Mortgage Loans, Held-for-Sale” and “— Other Assets and Other Liabilities.”
Valuation Techniques for Assets and Liabilities Measured on Our Consolidated Balance Sheets at Fair Value
We categorize assets and liabilities that we measure and report on our consolidated balance sheets at fair value within the fair value hierarchy based on the valuation techniques used to derive the fair value and our judgment regarding the observability of the related inputs. The following is a description of the valuation techniques we use for fair value measurement and disclosure; the significant inputs used in those techniques (if applicable); our basis for classifying the measurements as Level 1, Level 2, or Level 3 of the fair value hierarchy; and, for those measurements classified as Level 3 of the hierarchy, a narrative description of the sensitivity of the fair value measurement to changes in significant unobservable inputs and a description of any interrelationships between those unobservable inputs. Although the sensitivities of the unobservable inputs are generally discussed below in isolation, interrelationships exist among the inputs such that a change in one unobservable input typically results in a change to one or more of the other inputs. For example, the most common interrelationship that impacts the majority of our fair value measurements is between future interest rates, prepayment speeds, and probabilities of default. Generally, a change in the assumption used for future interest rates results in a directionally opposite change in the assumption used for prepayment speeds and a directionally similar change in the assumption used for probabilities of default.
Each technique discussed below may not be used in a given reporting period, depending on the composition of our assets and liabilities measured at fair value and relevant market activity during that period.
Investments in Securities
Mortgage-Related Securities
Agency Securities
Agency securities, both trading and available-for-sale, consist of mortgage-related securities issued and guaranteed by Freddie Mac, Fannie Mae, and Ginnie Mae. The valuation techniques for agency securities vary depending on the type of security.
Fixed-rate single-class securities are valued using observable prices for similar securities in the TBA market. The observable TBA prices vary based on agency, term, coupon, and settlement date. In addition, we may adjust the TBA price accordingly based on matrices we receive from external dealers for securities with specific collateral characteristics if we observe those collateral characteristics to be trading at a premium or discount to the TBA price. Significant inputs used in this technique are the TBA prices and the security characteristics mentioned above. These securities have observable market pricing and are classified as Level 2.
Adjustable-rate single-class securities and the majority of multiclass securities are valued using the median of external sources. For certain multiclass securities we are able to receive prices from only a single external source. Adjustable-rate single-class securities and the multiclass securities valued using these techniques generally have observable market prices and are classified as Level 2. However, certain multiclass securities valued using these techniques are classified as Level 3 when there is a low volume or level of activity in the market for those securities.
Certain multiclass securities for which we are not able to obtain external prices due to limited relevant market activity are valued using a discounted cash flow technique. Under this technique, securities are valued by starting with a third-party market price for a similar security within our portfolio. We then use our proprietary prepayment and interest rate models to calculate an OAS for the similar security, which is used to determine the net present value of the projected cash flows for the security to be valued. The significant unobservable input used in the fair value measurement of these securities is the OAS. Significant increases (decreases) in the OAS in isolation would result in a significantly lower (higher) fair value measurement. These securities are classified as Level 3 as significant inputs used in the fair value measurement are unobservable.
Certain complex multiclass securities for which current cash flow information is not readily available are valued using a risk-metric pricing technique. Under this technique, securities are valued by starting with a prior period price and adjusting that price for market changes in certain key risk metrics such as key rate durations. If necessary, our judgment is applied to adjust the price based on specific security characteristics. The significant unobservable inputs used in the fair value measurement of these securities are the key risk metrics. Significant increases (decreases) in key rate durations in isolation would result in a significantly lower (higher) fair value measurement. These securities are classified as Level 3 as significant inputs used in the fair value measurement are unobservable.
Commercial Mortgage-Backed Securities
The majority of our CMBS are valued using the median of external sources. For a small number of CMBS, we are able to receive prices from only a single external source. CMBS valued using these techniques generally have observable market pricing and are classified as Level 2. However, certain CMBS valued using these techniques are classified as Level 3 when there is a low volume or level of activity in the market for those securities.
Subprime, Option ARM, and Alt-A and Other (Mortgage-Related); Obligations of States and Political Subdivisions; and Manufactured Housing
Subprime, option ARM, and Alt-A and other securities consist of non-agency mortgage-related securities backed by subprime, option ARM, and/or Alt-A and other collateral. Obligations of states and political subdivisions consist primarily of housing revenue bonds. Manufactured housing securities consist of non-agency mortgage-related securities backed by loans on manufactured housing properties. These types of securities are all valued based on the median of external sources and are classified as Level 3 due to the low volume and level of activity in the markets for these securities.
U.S. Treasury Securities
U.S. Treasury securities are valued using quoted prices in active markets for identical assets and are classified as Level 1.
Mortgage Loans, Held-for-Sale
Mortgage loans, held-for-sale consist of multifamily mortgage loans with the fair value option elected that are measured at fair value on a recurring basis.
Our multifamily mortgage loans, held-for-sale are primarily valued using market prices from a third-party pricing service that uses a discounted cash flow technique calibrated to the exit price for these loans as reflected in the K Certificate securitization market. Under this technique, the pricing service forecasts cash flows for the various mortgage loans and discounts them at a market rate, including a spread that is based on our recent securitization activity, which we have defined as our principal exit market. These loans are classified as Level 2 given the observable nature of our securitization pricing.
Mortgage Loans, Held-for-Investment
Mortgage loans, held-for-investment consist of single-family and multifamily mortgage loans where the measurement of impairment is based on the fair value of the underlying collateral. These loans are measured at fair value on a non-recurring basis and are classified as Level 3 as significant inputs used in the fair value measurement are unobservable.
Single-family
The collateral is valued using our internal model that uses REO disposition, short sale and third-party sale values, combined with loan level characteristics using the repeat housing sales index to estimate the current fair value of the loan. The significant unobservable inputs used in the fair value measurement are the historical average sales proceeds and the repeat housing sales index. Significant increases (decreases) in the historical average sales proceeds per loan in isolation would result in significantly higher (lower) fair value measurements.
Multifamily
The underlying collateral is primarily valued using either an income capitalization technique or third-party appraisals.
Under the income capitalization technique, the collateral is valued by discounting the present value of future cash flows by applying an overall capitalization rate to the forecasted net operating income. The significant unobservable input used in the fair value measurement of these loans is the capitalization rate, which is determined through analysis of the DSCR. Significant increases (decreases) in the capitalization rate in isolation would result in a significantly lower (higher) fair value measurement.
Under the third-party appraisal technique, we use the prices provided by third-party appraisers without adjustment. The third-party appraisers consider the physical condition of the property and use comparable sales and other market data in determining the appraised value.
Derivative Assets, Net and Derivative Liabilities, Net
Derivative assets and derivative liabilities consist of interest-rate swaps, option-based derivatives, and other derivatives, such as exchange-traded futures and certain forward purchase and sale commitments.
Interest-Rate Swaps
Interest-rate swaps consist of receive-fixed, pay-fixed, and basis swaps. The majority of our interest-rate swaps are valued using a discounted cash flow technique. Under this technique, interest-rate swaps are valued by using the appropriate yield curves to discount the expected cash flows of both the fixed and variable rate components of the swap contracts. The significant inputs used in the fair value measurement of these derivatives are market-based interest rates. These derivatives are classified as Level 2 as the significant inputs used in the fair value measurement are observable in active markets.
Option-Based Derivatives
Option-based derivatives consist of interest rate caps, interest rate floors, call swaptions, and put swaptions. We value the majority of our option-based derivatives using an option-pricing model. Dealer-supplied interest rate volatility matrices are a key input into the model. Within each matrix, prices are provided for a range of option terms, swap terms, and strikes. Our model then interpolates between swaption terms to determine the volatility for each instrument. This volatility is the input to the option-pricing model to establish the price. These derivatives are classified as Level 2 as the significant inputs used are observable in active markets.
Other Derivatives
Other derivatives consist of exchange-traded futures and certain forward purchase and sale commitments.
Exchange-traded futures are valued using quoted prices in active markets for identical assets or liabilities and are classified as Level 1.
Certain purchase and sale commitments are also considered to be derivatives and are valued using the same techniques we use to value the underlying instruments we are committing to purchase or sell. These instruments generally have observable market pricing and are classified as Level 2. Valuation techniques for commitments to purchase or sell investment securities and to extinguish or issue debt securities of consolidated trusts are further discussed in “Investments in Securities.” Valuation techniques for commitments to purchase single-family mortgage loans are further discussed in “Valuation Techniques for Assets and Liabilities Not Measured on Our Consolidated Balance Sheets at Fair Value, but for Which the Fair Value is Disclosed — Mortgage Loans.”
Other Assets and Other Liabilities
Other assets consist of our guarantee asset related to guarantees issued to unconsolidated securitization trusts and mortgage servicing rights. Other liabilities, from time to time, consist of mortgage servicing rights.
Guarantee Asset
Our guarantee asset is primarily related to our multifamily guarantees. The multifamily guarantee asset is valued using a discounted cash flow technique. Under this technique, the present value of future cash flows related to our management and guarantee fee is discounted based on the current OAS-to-benchmark interest rates for new guarantees, which are driven by changes in our estimates of credit risk and changes in the credit profile of the multifamily guarantee portfolio. The significant unobservable input used in the fair value measurement of the guarantee asset is the OAS-to-benchmark rates. Significant increases (decreases) in the OAS in isolation would result in a significantly lower (higher) fair value measurement.
Our guarantee asset also consists of single family guarantees primarily related to long-term standby commitments, the vast majority of which is valued using the median of external sources. Under this technique, we obtain multiple price quotes from dealers, who provide estimates based on pricing for comparable benchmark securities with specific adjustments to reflect the unique characteristics of this asset class.
The guarantee asset is classified as Level 3 as significant inputs used in the fair value measurement are unobservable.
All Other Assets and Liabilities
All other assets and, from time to time, other liabilities consist primarily of mortgage servicing rights. Mortgage servicing rights are valued using a discounted cash flow technique by a third-party vendor that specializes in valuing and brokering sales of mortgage servicing rights. Under this technique, the cash flows from the mortgage servicing rights are discounted based on estimated prepayment rates, estimated costs to service both performing and non-accrual loans, and estimated servicing income per loan (including ancillary income). The significant unobservable inputs used in the fair value measurement of mortgage servicing rights are the estimates of prepayment rates, costs to service per loan, and servicing income per loan. Significant increases (decreases) in cost to service per loan, and prepayment rate in isolation would result in a significantly lower (higher) fair value measurement. Significant increases (decreases) in servicing income per loan in isolation would result in a significantly higher (lower) fair value measurement. Mortgage servicing rights are classified as Level 3 as significant inputs used in the fair value measurement are unobservable.
REO, Net
REO, net consists primarily of single-family REO. REO, net is initially measured at its fair value less costs to sell, and is subsequently measured at the lower of cost or fair value less costs to sell. REO, net is valued using an internal model and is classified as Level 3 as significant inputs used in the fair value measurement are unobservable.
As of September 30, 2014, our internal model uses REO disposition prices combined with loan level characteristics using the repeat housing sales index to estimate the current fair value of the REO. This valuation technique is used to measure both the initial value of REO and the valuation of REO at the lower of cost or fair value, as necessary. The significant unobservable inputs used in the fair value measurement of REO, net are the historical sales proceeds per property and the repeat housing sales index. Significant increases (decreases) in the historical sales proceeds per property in isolation would result in significantly higher (lower) fair value measurement.
As of December 31, 2013, our internal model used actual REO disposition prices for the prior three months, calibrated to the most recent month's disposition prices, to determine the average sales proceeds per property at the state level, expressed as a fixed percentage based on the ratio of the disposition price to the UPB of the associated loan. This fixed percentage was then applied to the UPB immediately prior to the acquisition to determine the fair value of the individual property. Certain adjustments, such as state-level adjustments, were made to the estimated fair value, as applicable. The significant unobservable input used in the fair value measurement of REO, net was the historical average sales proceeds per property by state. Significant increases (decreases) in the historical average sales proceeds per property by state in isolation would result in a significantly higher (lower) fair value measurement.
Debt Securities of Consolidated Trusts Held by Third Parties, at Fair Value
We elected the fair value option for interest-only debt securities of consolidated trusts held by third parties. These consist of a multifamily K Certificate where we are in a first loss position and certain REMICs. These are valued using either the median of external sources or a single external source (which may be the counterparty to the transaction) and are classified as Level 2 due to market pricing that is observable. See “Fair Value Option — Debt Securities of Consolidated Trusts Held by Third Parties” for additional information.
Other Debt, at Fair Value
We elected the fair value option on our STACR debt notes. Our STACR debt notes are valued using the median of external sources and are classified as Level 2 based on observable market prices. See “Fair Value Option — Other Debt” for additional information.
Quantitative Information about Level 3 Fair Value Measurements for Assets and Liabilities Measured on Our Consolidated Balance Sheets at Fair Value
The table below provides valuation techniques, the range, and the weighted average of significant unobservable inputs for assets and liabilities measured on our consolidated balance sheets at fair value on a recurring basis using unobservable inputs (Level 3) as of September 30, 2014 and December 31, 2013.
Table 16.4 — Quantitative Information about Recurring Level 3 Fair Value Measurements
	30-Sep-14
	Total			Level  3			Predominant		Unobservable Inputs(1)
	Fair			Fair			Valuation
	Value			Value			Technique(s)		Type	Range		Weighted
												Average
	(dollars in millions)
Recurring fair value measurements
Assets
Investments in securities
Available-for-sale, at fair value
Mortgage-related securities
Freddie Mac				$	1,966		Risk metric		Effective duration(2)	0.96 - 8.84 years		2.11 years
				1,781			Discounted cash flows		OAS	(146) - 141 bps		37 bps
				559			Other
Total Freddie Mac	$	41,363		4,306
Fannie Mae				60			Discounted cash flows		OAS	(5,649) - 1,082 bps		91 bps
				43			Median of external sources		External pricing sources	$107.9 - $112.5		$	110.2
				3			Other
Total Fannie Mae	10,526			106
Ginnie Mae				4			Discounted cash flows
Total Ginnie Mae	210			4
CMBS				2,446			Single external source		External pricing source	$99.0 - $99.0		$	99
				369			Risk Metrics		Effective duration(2)	5.67 - 10.04 years		7.49 years
				537			Other
Total CMBS	23,614			3,352
Subprime, option ARM, and Alt-A:
Subprime				21,170			Median of external sources		External pricing sources	$70.4 - $75.8		$	73.1
				1,531			Other
Total subprime	22,701			22,701
Option ARM				4,342			Median of external sources		External pricing sources	$65.7 - $71.0		$	68.3
				16			Single external source		External pricing source	$51.1 - $51.1		$	51.1
				1,349			Other
Total option ARM	5,707			5,707
Alt-A and other				4,643			Median of external sources		External pricing sources	$83.8 - $86.5		$	85.2
				870			Other
Total Alt-A and other	5,513			5,513
Obligations of states and political subdivisions				2,289			Median of external sources		External pricing sources	$101.0 - $101.8		$	101.4
				204			Other
Total obligations of states and political subdivisions	2,493			2,493
Manufactured housing				478			Single external source		External pricing source	$91.0 - $91.0		$	91
				146			Discounted cash flows		OAS	290- 640 bps		373 bps
				26			Other
Total manufactured housing	650			650
Total available-for-sale mortgage-related securities	112,777			44,832
Trading, at fair value
Mortgage-related securities
Freddie Mac				628			Discounted cash flows		OAS	(197) - 9,748 bps		268 bps
				110			Risk Metrics		Effective duration(2)	(19.99) - 2.83 years		1.41 years
				157			Other
Total Freddie Mac	14,900			895
Fannie Mae				177			Discounted cash flows		OAS	(97) - 2,039 bps		427 bps
Total Fannie Mae	6,238			177
Ginnie Mae	17			—
Other				3			Median of external sources
				1			Discounted cash flows
Total other	120			4
Total trading mortgage-related securities	21,275			1,076
Total investments in securities	$	134,052		$	45,908
Other assets:
Guarantee asset, at fair value				$	1,201		Discounted cash flows		OAS	17- 202 bps		55 bps
				369			Median of external sources		External pricing sources	$10.8 - $23.7		$	18
Total guarantee asset, at fair value	$	1,570		1,570
All other, at fair value				8			Other
Total all other, at fair value	8			8
Total other assets	1,578			1,578
Liabilities
Net derivatives				11			Other
Total net derivatives	1,033			11
	December 31, 2013
	Total			Level  3			Predominant		Unobservable Inputs(1)
	Fair			Fair			Valuation
	Value			Value			Technique(s)		Type	Range		Weighted
												Average
	(dollars in millions)
Recurring fair value measurements
Assets
Investments in securities
Available-for-sale, at fair value
Mortgage-related securities
Freddie Mac				$	1,547		Risk metric		Effective duration(2)	2.25 -5.17 years		2.44 years
				133			Single external source		External pricing source	$99.3 - $99.3		$	99.3
				259			Other
Total Freddie Mac	$	40,659		1,939
Fannie Mae				91			Single external source		External pricing source	$110.5 - $110.5		$	110.5
				26			Median of external sources		External pricing sources	$104.1 - $105.3		$	104.7
				14			Other
Total Fannie Mae	10,797			131
Ginnie Mae				6			Median of external sources
				6			Discounted cash flows
Total Ginnie Mae	167			12
CMBS				2,942			Single external source		External pricing source	$90.9 - $90.9		$	90.9
				167			Other
Total CMBS	30,338			3,109
Subprime, option ARM, and Alt-A:
Subprime				25,367			Median of external sources		External pricing sources	$64.5 - $73.8		$	68.7
				2,132			Other
Total subprime	27,499			27,499
Option ARM				4,995			Median of external sources		External pricing sources	$60.8 - $67.0		$	64.4
				705			Discounted cash flows		OAS	461 - 944 bps		729 bps
				874			Other
Total option ARM	6,574			6,574
Alt-A and other				4,028			Single external source		External pricing source	$83.4 - $83.4		$	83.4
				3,503			Median of external sources		External pricing sources	$72.5 - $79.1		$	75.7
				1,175			Other
Total Alt-A and other	8,706			8,706
Obligations of states and political subdivisions				3,067			Median of external sources		External pricing sources	$98.7 - $99.7		$	99.2
				428			Other
Total obligations of states and political subdivisions	3,495			3,495
Manufactured housing				577			Median of external sources		External pricing sources	$86.7 - $92.8		$	89.7
				107			Other
Total manufactured housing	684			684
Total available-for-sale mortgage-related securities	128,919			52,149
Trading, at fair value
Mortgage-related securities
Freddie Mac				297			Discounted cash flows		OAS	(5) - 9,441 bps		364 bps
				46			Other
Total Freddie Mac	9,349			343
Fannie Mae				191			Discounted cash flows		OAS	(2,257) - 2,295 bps		199 bps
				30			Other
Total Fannie Mae	7,180			221
Ginnie Mae				74			Median of external sources
Total Ginnie Mae	98			74
Other				7			Single external source
				1			Other
Total other	141			8
Total trading mortgage-related securities	16,768			646
Total investments in securities	$	145,687		$	52,795
Other assets:
Guarantee asset, at fair value				$	1,163		Discounted cash flows		OAS	16 - 202 bps		53 bps
				448			Median of external sources		External pricing sources	$11.6 - $25.4		$	19.2
Total guarantee asset, at fair value	$	1,611		1,611
All other, at fair value				9			Other
Total all other, at fair value	9			9
Total other assets	1,620			1,620
Liabilities
Other debt, at fair value				1,000			Single external source		External pricing source	$100.0 - $100.0		$	100
				528			Median of external sources		External pricing sources	$100.0 - $100.1		$	100
Total other debt recorded at fair value	2,683			1,528
Net derivatives				283			Single external source		External pricing source	$0.8 - $0.8		$	0.8
				37			Discounted cash flows
				5			Other
Total net derivatives	(883		)	325
-1	Certain unobservable input types, range, and weighted average data are not disclosed in this table if they are associated with a class: (a) that has a Level 3 fair value measurement that is not considered material; or (b) where we have disclosed the predominant valuation technique with related unobservable inputs for the most significant portion of that class.
-2	Effective duration is used as a proxy to represent the aggregate impact of key rate durations.
The table below provides valuation techniques, the range, and the weighted average of significant unobservable inputs for assets and liabilities measured on our consolidated balance sheets at fair value on a non-recurring basis using unobservable inputs (Level 3) as of September 30, 2014 and December 31, 2013.
Table 16.5 — Quantitative Information about Non-Recurring Level 3 Fair Value Measurements
	30-Sep-14
	Total			Level 3			Predominant		Unobservable Inputs(1)
	Fair			Fair			Valuation
	Value			Value			Technique(s)		Type	Range		Weighted
												Average
	(dollars in millions)
Non-recurring fair value measurements
Mortgage loans	$	9,265		$	9,265
							Internal model(2)		Historical sales	$3,000 - $815,800		$122,124
									proceeds
							Internal model(2)		Housing sales index	37 - 305 bps		84 bps
							Third-party appraisal		Property value	$9 million - $44 million		$33 million
							Income capitalization		Capitalization rates(3)	6% - 9%		7%
REO, net	$	1,259		$	1,259
							Internal model(2)		Historical sales	$3,000 - $733,643		$114,287
									proceeds
							Internal model(2)		Housing sales index	37 - 305 bps		84 bps
	31-Dec-13
	Total			Level  3			Predominant		Unobservable Inputs(1)
	Fair			Fair			Valuation
	Value			Value			Technique(s)		Type	Range		Weighted
												Average
	(dollars in millions)
Non-recurring fair value measurements
Mortgage loans	$	515		$	515
							Income capitalization		Capitalization rates(3)	6% - 9%		7%
							Third-party appraisal		Property value	$4 million - $44 million		$27 million
REO, net	$	1,837		$	1,837		Internal model(4)		Historical average sales	$17,500- $318,391		$105,508
									proceeds per property
									by state(5)
-1	Certain unobservable input types, range, and weighted average data are not disclosed in this table if they are associated with a class: (a) that has a Level 3 fair value measurement that is not considered material; or (b) where we have disclosed the predominant valuation technique with related unobservable inputs for the most significant portion of that class.
-2	Represents an internal model that uses REO disposition, short sale and third-party sale values for loans, combined with loan level characteristics using the repeat housing sales index to estimate the current fair value of the REO or loan. This valuation technique is used to measure both the initial value of REO and the valuation of REO at the lower of cost or fair value, as necessary, and the allowance for held-for-investment mortgage loans to collateral value.
-3	The capitalization rate “Range” and “Weighted Average” represent those loans that are valued using the Income Capitalization approach, which is the predominant valuation technique used for this population of multifamily mortgage loans. Certain loans in this population are valued using other techniques, and the capitalization rate for those is not represented in the “Range” or “Weighted Average” above.
-4	Represents an internal model that uses actual REO disposition prices for the prior three months, calibrated to the most recent month's disposition prices, to determine the average sales proceeds per property at the state level, expressed as a fixed percentage based on the ratio of the disposition price to the UPB of the associated loan. This valuation technique is used to measure both the initial value of REO and the valuation of REO at the lower of cost or fair value, as necessary.
-5	Represents the average of three months of REO sales proceeds by state. The national average REO disposition severity ratio for our REO properties was 35.8% for the three months ended December 31, 2013.
Fair Value of Financial Instruments
The table below presents the carrying value and estimated fair value of our financial instruments as of September 30, 2014 and December 31, 2013.
Table 16.6 — Fair Value of Financial Instruments
	30-Sep-14
				Fair Value
	Carrying  Amount(1)			Level 1			Level 2			Level 3				Netting Adjustments			Total
	(in millions)
Financial Assets
Cash and cash equivalents	$	16,191		$	16,191		$	—		$	—			$	—		$	16,191
Restricted cash and cash equivalents	6,264			6,264			—			—				—			6,264
Federal funds sold and securities purchased under agreements to resell	29,956			—			29,956			—				—			29,956
Investments in securities:
Available-for-sale, at fair value	112,777			—			67,945			44,832				—			112,777
Trading, at fair value	30,434			9,159			20,199			1,076				—			30,434
Total investments in securities	143,211			9,159			88,144			45,908				—			143,211
Mortgage loans:
Mortgage loans held by consolidated trusts	1,549,533			—			1,353,333			203,835				—			1,557,168
Unsecuritized mortgage loans	141,438			—			17,416			120,973				—			138,389
Total mortgage loans	1,690,971			—			1,370,749			324,808				—			1,695,557
Derivative assets, net	897			—			9,031			36				(8,170		)	897
Guarantee asset	1,570			—			—			1,794				—			1,794
Advances to lenders	67			—			67			—				—			67
Total financial assets	$	1,889,127		$	31,614		$	1,497,947		$	372,546			$	(8,170	)	$	1,893,937
Financial Liabilities
Debt, net:
Debt securities of consolidated trusts held by third parties	$	1,467,845		$	—		$	1,494,687		$	2,228			$	—		$	1,496,915
Other debt	435,706			—			432,829			9,983				—			442,812
Total debt, net	1,903,551			—			1,927,516			12,211				—			1,939,727
Derivative liabilities, net	1,930			—			10,384			47				(8,501		)	1,930
Guarantee obligation	1,561			—			—			3,211				—			3,211
Total financial liabilities	$	1,907,042		$	—		$	1,937,900		$	15,469			$	(8,501	)	$	1,944,868
	December 31, 2013
				Fair Value
	Carrying Amount(1)			Level 1			Level 2			Level 3				Netting Adjustments			Total
	(in millions)
Financial Assets
Cash and cash equivalents	$	11,281		$	11,281		$	—		$	—			$	—		$	11,281
Restricted cash and cash equivalents	12,265			12,264			1			—				—			12,265
Federal funds sold and securities purchased under agreements to resell	62,383			—			62,383			—				—			62,383
Investments in securities:
Available-for-sale, at fair value	128,919			—			76,770			52,149				—			128,919
Trading, at fair value	23,404			6,636			16,122			646				—			23,404
Total investments in securities	152,323			6,636			92,892			52,795				—			152,323
Mortgage loans:
Mortgage loans held by consolidated trusts	1,529,905			—			1,258,049			249,693				—			1,507,742
Unsecuritized mortgage loans	154,885			—			16,145			122,065				—			138,210
Total mortgage loans	1,684,790			—			1,274,194			371,758				—			1,645,952
Derivative assets, net	1,063			—			14,220			11				(13,168		)	1,063
Guarantee asset	1,611			—			—			1,879				—			1,879
Total financial assets	$	1,925,716		$	30,181		$	1,443,690		$	426,443			$	(13,168	)	$	1,887,146
Financial Liabilities
Debt, net:
Debt securities of consolidated trusts held by third parties	$	1,433,984		$	—		$	1,434,208		$	2,690			$	—		$	1,436,898
Other debt	506,767			—			499,756			13,089				—			512,845
Total debt, net	1,940,751			—			1,933,964			15,779				—			1,949,743
Derivative liabilities, net	180			—			13,291			336				(13,447		)	180
Guarantee obligation	1,522			—			—			3,067				—			3,067
Total financial liabilities	$	1,942,453		$	—		$	1,947,255		$	19,182			$	(13,447	)	$	1,952,990
-1	Equals the amount reported on our GAAP consolidated balance sheets.
Valuation Techniques for Assets and Liabilities Not Measured on Our Consolidated Balance Sheets at Fair Value, but for Which the Fair Value is Disclosed
The following is a description of the valuation techniques we use for items not measured on our consolidated balance sheets at fair value, but for which the fair value is disclosed, the significant inputs used in those techniques (if applicable), and our basis for classifying the measurements as Level 1, Level 2, or Level 3 of the valuation hierarchy. Each technique discussed below may not be used in a given reporting period, depending on the composition of our assets and liabilities measured at fair value and relevant market activity during that period.
Cash and Cash Equivalents (including Restricted Cash and Cash Equivalents)
Cash and cash equivalents (including restricted cash and cash equivalents) largely consist of highly liquid investment securities with an original maturity of three months or less used for cash management purposes, as well as cash held at financial institutions and cash collateral posted by our derivative counterparties. Given that these assets are short-term in nature with limited market value volatility, the carrying amount on our GAAP consolidated balance sheets is deemed to be a reasonable approximation of fair value. Cash and restricted cash are classified as Level 1. Cash equivalents (including restricted cash equivalents) may be classified as Level 2 in cases where we use observable inputs other than quoted prices in active markets for identical assets to determine the fair value measurement, or Level 1 in cases where we can obtain quoted prices in active markets for identical assets.
Federal Funds Sold and Securities Purchased Under Agreements to Resell
Federal funds sold and securities purchased under agreements to resell principally consist of short-term contractual agreements such as reverse repurchase agreements involving U.S. Treasury and agency securities and federal funds sold. Given that these assets are short-term in nature, the carrying amount on our GAAP consolidated balance sheets is deemed to be a reasonable approximation of fair value. Federal funds sold and securities purchased under agreements to resell are classified as Level 2 because these assets have observable market pricing, but quoted prices for identical assets are not available.
Mortgage Loans
Single-family and multifamily mortgage loans classified as held-for-investment are recorded at amortized cost. Certain held-for-investment multifamily mortgage loans are recorded at the fair value of the underlying collateral upon impairment. Multifamily held-for-sale mortgage loans are recorded at fair value due to the election of the fair value option.
Single-Family Loans
Determination of Principal Market
In determining the fair value of single-family mortgage loans, valuation outcomes can vary widely based on management judgments and decisions used in determining: (a) the principal market; (b) modeling assumptions, including default, severity, home prices, and risk premiums; and (c) inputs used to determine variables including risk premiums, credit costs, security pricing, and implied management and guarantee fees. Our principal markets include the GSE securitization market and the whole loan market. To determine the principal market, we considered the market with the greatest volume and level of activity and our ability to access that market. In the absence of a market with active trading, we determined the market that would maximize the amount we would receive upon sale. We determined that the principal market is the whole loan market for loans that: (a) are four or more months delinquent; (b) are in foreclosure; (c) have completed a loan modification but have not been current for at least 6 consecutive months; (d) have completed a loan modification and have a current LTV ratio greater than 125%; or (e) have been modified through a process that included forbearance on a portion of the outstanding balance. The total UPB of loans where the whole loan market is the principal market was approximately $73.5 billion and $101.2 billion as of September 30, 2014 and December 31, 2013, respectively. We determined that the principal market for all other loans, regardless of whether the loan is currently securitized or whether the loan is eligible for purchase under current underwriting standards, is the GSE securitization market. The total UPB of loans where the GSE securitization market is the principal market was approximately $1.6 trillion and $1.5 trillion as of September 30, 2014 and December 31, 2013, respectively.
Whole Loan Market as Principal Market
Loans where we determine that the principal market is the whole loan market are valued using the median of external sources. Under the median of external sources technique, prices for single-family loans are obtained from multiple dealers. These dealers reference market activity for deeply delinquent and modified loans, where available, and use internal models and their judgment to determine default rates, severity rates, home prices, and risk premiums. Single-family mortgage loans valued using this technique are classified as Level 3 due to the low volume and level of activity in this market.
GSE Securitization Market as Principal Market
Loans where we determine that the principal market is the GSE securitization market are valued using the build-up technique. Under the build-up technique, the fair value of single-family mortgage loans is based on the estimate of the price we would receive if we were to securitize the loans. These loans are valued by starting with benchmark security pricing for actively traded mortgage-related securities with similar characteristics; adding in the value of our management and guarantee fee, which is the compensation we receive for performing our management and guarantee activities; and subtracting the value of the credit obligation related to performing our guarantee.
The security price is based on benchmark security pricing for similar actively traded mortgage-related securities, adjusted as necessary based on security characteristics. This security pricing process is consistent with our approach for valuing similar securities retained in our investment portfolio or issued as debt to third parties. See “Valuation Techniques for Assets and Liabilities Measured on Our Consolidated Balance Sheets at Fair Value — Investments in Securities.”
The management and guarantee fee is valued by estimating the present value of the additional cash flows related to our management and guarantee fee. The management and guarantee fees for the majority of our loans are valued using third-party dealer prices on hypothetical interest-only securities based on collateral characteristics from our single-family credit guarantee portfolio. For loans where third-party market data is not readily available, we use a discounted cash flow approach, leveraging the dealer prices received for the majority of our loans and including only those cash flows related to our management and guarantee fee.
The credit obligation related to performing our guarantee is valued by estimating the fair value of the related credit and other costs (such as general and administrative expenses) and benefits (such as credit enhancements) inherent in our guarantee obligation. For loans that qualify for purchase under current underwriting standards, we use the delivery and guarantee fees that we charge under our current market pricing as a market observation. For loans that do not qualify for purchase based on current underwriting standards, we use our internal credit models, which incorporate factors such as loan characteristics, loan performance status information, expected losses, and risk premiums.
Single-family mortgage loans that qualify for purchase under current underwriting standards are classified as Level 2 as the significant inputs used for the valuation of these loans, such as security pricing, our externally published credit pricing matrices, and third-party prices used in valuing the management and guarantee fee, are observable, while the unobservable inputs, such as general and administrative expenses and credit enhancements, are not significant to the fair value measurement. Single-family mortgage loans that do not qualify for purchase under current underwriting standards are classified as Level 3 as the credit cost is based on our internal credit models which use unobservable inputs that are significant to the fair value measurement.
HARP Loans
For loans that have been refinanced under HARP, we value our guarantee obligation using the delivery and guarantee fees currently charged by us under that initiative. HARP loans valued using this technique are classified as Level 2, as the fees charged by us are observable. If, subsequent to delivery, the refinanced loan no longer qualifies for purchase based on current underwriting standards (such as becoming past due or being modified), the fair value of the guarantee obligation is then measured using: (a) our internal credit models; or (b) the median of external sources, if the loan’s principal market has changed to the whole loan market. HARP loans valued using either of these techniques are classified as Level 3 as significant inputs are unobservable. The majority of our HARP loans are classified as Level 2.
The total compensation that we receive for the delivery of a HARP loan reflects the pricing that we are willing to offer because HARP is a part of a broader government program intended to provide assistance to homeowners and prevent foreclosures. When HARP ends (currently scheduled for December 31, 2015), the beneficial pricing afforded to HARP loans will no longer be reflected in our delivery and guarantee fee pricing structure. If these benefits were not reflected in the pricing for these loans, the fair value of our mortgage loans would have decreased by $21.3 billion and $18.5 billion as of September 30, 2014 and December 31, 2013, respectively. The total fair value of the loans in our portfolio that reflects the pricing afforded to HARP loans as of September 30, 2014 and December 31, 2013 as presented on our consolidated fair value balance sheets is $126.3 billion and $145.0 billion, respectively.
Multifamily Loans
For a discussion of the techniques used to determine the fair value of held-for-sale and impaired held-for-investment multifamily mortgage loans, see “Valuation Techniques for Assets and Liabilities Measured on Our Consolidated Balance Sheets at Fair Value — Mortgage Loans, Held-for-Sale” and “— Mortgage Loans, Held-for-Investment,” respectively. Non-impaired multifamily mortgage loans are primarily valued using market prices from a third-party pricing service that uses a discounted cash-flow technique. Under this technique, the pricing service forecasts cash flows for the various mortgage loans and discounts them at a market rate, including a spread that is based on pricing data obtained from purchases and sales of similar mortgage loans, adjusted based on the mortgage's current LTV ratio and DSCR. The significant unobservable inputs used in the fair value measurement of these loans are the current LTV ratio and DSCR. These loans are classified as Level 3 as significant inputs used in the fair value measurement are unobservable.
Total Debt, Net
Total debt, net represents debt securities of consolidated trusts held by third parties and other debt that we issued to finance our assets. On our consolidated GAAP balance sheets, total debt, net, excluding debt securities for which the fair value option has been elected, is reported at amortized cost, which is net of deferred items, including premiums, discounts, and hedging-related basis adjustments.
For debt securities of consolidated trusts, the valuation techniques we use are similar to the techniques we use to value our investments in agency securities for GAAP purposes. See “Valuation Techniques for Assets and Liabilities Measured on Our Consolidated Balance Sheets at Fair Value — Investments in Securities — Mortgage-Related Securities — Agency Securities” for additional information regarding the valuation techniques we use.
Other debt includes short-term zero-coupon discount notes, callable debt, and non-callable debt. Short-term zero-coupon discount notes are valued using a yield analysis technique. Under this technique, the debt instruments are valued using published yield matrices which are based on the days to maturity of the debt and converted into a price. Significant inputs used in this technique are the published yield matrices. Short-term zero-coupon discount notes are classified as Level 2 as the significant inputs used are observable in active markets. Other debt securities, including both callable and non-callable debt, are valued using a single external source or median of external sources. These debt securities generally have observable market pricing and are classified as Level 2. However, certain other debt securities are classified as Level 3 when there is a low volume or level of activity in the market for those types of debt securities.
Total debt, net for which we have elected the fair value option includes certain debt securities of consolidated trusts held by third parties and certain other debt. We report these items at fair value on our GAAP consolidated balance sheets. See “Valuation Techniques for Assets and Liabilities Measured on Our Consolidated Balance Sheets at Fair Value — Debt Securities of Consolidated Trusts Held by Third Parties, at Fair Value” and “— Other Debt, at Fair Value” for additional information.
Guarantee Obligation
Our guarantee obligation is classified as Level 3 as significant inputs used in the fair value measurement are unobservable. The technique for estimating the fair value of our guarantee obligation is described in the “Mortgage Loans — Single-Family Loans” section above.
Fair Value Option
We elected the fair value option for certain types of investments in securities, multifamily held-for-sale mortgage loans, and certain debt.
Investments in Securities
We elected the fair value option for certain mortgage-related securities to better reflect the natural offset these securities provide to fair value changes recorded historically on our guarantee asset at the time of our election. In addition, upon adoption of the accounting guidance for the fair value option, we elected this option for securities within the scope of the accounting guidance for investments in beneficial interests in securitized financial assets to better reflect any valuation changes that would occur subsequent to impairment write-downs previously recorded on these instruments. Related interest income continues to be reported as interest income in our consolidated statements of comprehensive income. See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Investments in Securities” in our 2013 Annual Report for additional information about the measurement and recognition of interest income on investments in securities. For information regarding the net unrealized gains (losses) on trading securities, which include gains (losses) for other items that are not selected for the fair value option, see Gains (losses) on trading securities within “Table 13.2 — Segment Earnings and Reconciliation to GAAP Results."
Multifamily Held-For-Sale Mortgage Loans
We elected the fair value option for multifamily mortgage loans that were purchased for securitization. These multifamily mortgage loans are classified as held-for-sale mortgage loans on our consolidated balance sheets to reflect our intent to sell in the future. Related interest income continues to be reported as interest income in our consolidated statements of comprehensive income. See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Mortgage Loans” in our 2013 Annual Report for additional information about the measurement and recognition of interest income on our mortgage loans.
Debt Securities of Consolidated Trusts Held by Third Parties
We elected the fair value option for certain debt securities of consolidated trusts held by third parties. These consist of a multifamily K Certificate where we are in a first loss position and certain REMIC interest-only mortgage-related debt securities. We elected the fair value option on these debt instruments as they contain embedded derivatives that require bifurcation. Fair value changes for debt securities of consolidated trusts held by third parties are recorded in other income in our consolidated statements of comprehensive income. Related interest expense continues to be reported as interest expense in our consolidated statements of comprehensive income. See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Debt Securities Issued” in our 2013 Annual Report for additional information about the measurement and recognition of interest expense on debt securities issued.
Other Debt
We elected the fair value option on our STACR debt notes. We elected the fair value option on these debt instruments to better reflect the economic offset that naturally results from the debt due to changes in interest rates. Fair value changes for debt for which we have elected the fair value option are recorded in other income in our consolidated statements of comprehensive income. Related interest expense continues to be reported as interest expense in our consolidated statements of comprehensive income. See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Debt Securities Issued” in our 2013 Annual Report for additional information about the measurement and recognition of interest expense on debt securities issued.
The table below presents the fair value and UPB related to certain items for which we have elected the fair value option at September 30, 2014 and December 31, 2013.
Table 16.7 — Difference between Fair Value and Unpaid Principal Balance for Certain Financial Instruments with Fair Value Option Elected
	30-Sep-14						31-Dec-13
	Multifamily			Other Debt -			Multifamily			Other Debt -
	Held-For-Sale			Long Term			Held-For-Sale			Long Term
	Mortgage Loans						Mortgage Loans
	(in millions)
Fair value	$	7,719		$	4,988		$	8,727		$	2,683
Unpaid principal balance	7,615			4,901			8,721			2,635
Difference	$	104		$	87		$	6		$	48
Changes in Fair Value under the Fair Value Option Election
We recorded gains (losses) of $117 million and $113 million for the three months ended September 30, 2014 and 2013, respectively, and $526 million and $(441) million for the nine months ended September 30, 2014 and 2013, respectively, from the change in fair value on multifamily held-for-sale mortgage loans recorded at fair value in other income in our consolidated statements of comprehensive income.
Gains (losses) on debt securities with the fair value option elected were $156 million and $(28) million for the three months ended September 30, 2014 and 2013, respectively, and $(22) million and $(13) million for the nine months ended September 30, 2014 and 2013, respectively, and were recorded in other income in our consolidated statements of comprehensive income.
Changes in fair value attributable to instrument-specific credit risk were not material for the three and nine months ended September 30, 2014 and 2013 for any assets or liabilities for which we elected the fair value option.

Legal_Contingencies

Legal Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
LEGAL CONTINGENCIES	'
	NOTE 17: LEGAL CONTINGENCIES
	We are involved as a party in a variety of legal and regulatory proceedings arising from time to time in the ordinary course of business including, among other things, contractual disputes, personal injury claims, employment-related litigation and other legal proceedings incidental to our business. We are frequently involved, directly or indirectly, in litigation involving mortgage foreclosures. From time to time, we are also involved in proceedings arising from our termination of a seller/servicer’s eligibility to sell mortgages to, and/or service mortgages for, us. In these cases, the former seller/servicer sometimes seeks damages against us for wrongful termination under a variety of legal theories. In addition, we are sometimes sued in connection with the origination or servicing of mortgages. These suits typically involve claims alleging wrongful actions of seller/servicers. Our contracts with our seller/servicers generally provide for indemnification of Freddie Mac against liability arising from seller/servicers' wrongful actions with respect to mortgages sold to or serviced for Freddie Mac.
	Litigation and claims resolution are subject to many uncertainties and are not susceptible to accurate prediction. In accordance with the accounting guidance for contingencies, we reserve for litigation claims and assessments asserted or threatened against us when a loss is probable (as defined in such guidance) and the amount of the loss can be reasonably estimated.
	During the nine months ended September 30, 2014, we paid approximately $11 million for the advancement of legal fees and expenses of former officers pursuant to our indemnification obligations to them. These fees and expenses related to certain of the matters described below, and are being partially offset by insurance payments. This figure does not include certain administrative support costs and certain costs related to document production and storage.
	Putative Securities Class Action Lawsuit: Ohio Public Employees Retirement System (“OPERS”) vs. Freddie Mac, Syron, et al.
	This putative securities class action lawsuit was filed against Freddie Mac and certain former officers on January 18, 2008 in the U.S. District Court for the Northern District of Ohio purportedly on behalf of a class of purchasers of Freddie Mac stock from August 1, 2006 through November 20, 2007. FHFA later intervened as Conservator, and the plaintiff amended its complaint on several occasions. The plaintiff alleged, among other things, that the defendants violated federal securities laws by making false and misleading statements concerning our business, risk management, and the procedures we put into place to protect the company from problems in the mortgage industry. The plaintiff sought unspecified damages and interest, and reasonable costs and expenses, including attorney and expert fees.
	Defendants filed motions to dismiss the second and third amended complaints, which the Court initially denied. On April 13, 2013, the judge who had presided over the case since 2008 recused himself, and the case was reassigned to a new judge. On August 23, 2013, the new judge granted defendants' motion to vacate the previous judge's orders denying defendants' motions to dismiss. Defendants filed new motions to dismiss the complaint on October 8, 2013. On October 31, 2014, the Court granted defendants’ motions and dismissed the case in its entirety against all defendants, with prejudice.
	At present, it is not possible for us to predict the probable outcome of this lawsuit or any potential effect on our business, financial condition, liquidity, or results of operations. In addition, we are unable to reasonably estimate the possible loss or range of possible loss in the event of an adverse judgment in the foregoing matter due to the following factors, among others: the possibility that plaintiff will appeal the judgment of the District Court; the inherent uncertainty of the appellate process, including the outcome of any petition for certiorari; the inherent uncertainty of pre-trial litigation in the event the case is ultimately remanded to the District Court in whole or in part; and the fact that the parties have not briefed and the District Court has not yet ruled upon motions for class certification or summary judgment. In particular, absent resolution of the appellate process, the certification of a class, the identification of a class period, and the identification of the alleged statement or statements that survive dispositive motions, we cannot reasonably estimate any possible loss or range of possible loss.
	Related Third Party Litigation
	On December 16, 2011, the SEC announced that it had charged three former executives of Freddie Mac with securities laws violations. These executives are former Chairman of the Board and Chief Executive Officer Richard F. Syron, former Executive Vice President and Chief Business Officer Patricia L. Cook, and former Executive Vice President for the single-family guarantee business Donald J. Bisenius.
	On July 6, 2011, a lawsuit styled Liberty Mutual Insurance Company, Peerless Insurance Company, Employers Insurance Company of Wausau, Safeco Corporation and Liberty Life Assurance Company of Boston vs. Goldman, Sachs & Co. was filed in the U.S. District Court for Massachusetts. The case was subsequently transferred to the U.S. District Court for the Southern District of New York. The defendants in the case were underwriters of the company’s November 2007 public offering of preferred stock. The plaintiffs generally allege that the underwriters made materially misleading statements and omissions in connection with the offering. Freddie Mac is not named as a defendant in the lawsuit.
	Litigation Related to the Taylor, Bean & Whitaker (TBW) Bankruptcy
	On August 24, 2009, TBW, which had been one of our single-family seller/servicers, filed for bankruptcy in the U.S. Bankruptcy Court for the Middle District of Florida. We entered into a settlement with TBW and the TBW creditors' committee regarding the TBW bankruptcy in 2011. However, we continue to be involved in litigation with other parties relating to the TBW bankruptcy, as described below.
	On or about May 14, 2010, certain underwriters at Lloyds, London and London Market Insurance Companies brought an adversary proceeding in the U.S. Bankruptcy Court for the Middle District of Florida against TBW, Freddie Mac and other parties seeking a declaration rescinding $90 million of mortgage bankers bonds providing fidelity and errors and omissions insurance coverage. Several excess insurers on the bonds thereafter filed similar claims in that action. Freddie Mac has filed a proof of loss under the bonds. The underwriters moved for partial summary judgment against Freddie Mac in April 2013. The Court denied this motion on March 27, 2014, and the underwriters subsequently appealed the denial of the motion to the U.S. District Court. Numerous additional motions for summary judgment have been filed by the parties, including by Freddie Mac. These motions are pending. Discovery is proceeding. At present, it is not possible for us to predict the probable outcome of this lawsuit.
	On September 15, 2014, Freddie Mac filed a lawsuit in the Circuit Court of the 11th Judicial Circuit in Miami-Dade County, Florida against Deloitte & Touche LLP (Deloitte) for negligent misrepresentation / false information negligently supplied for the guidance of others. The complaint alleges, among other items, that Deloitte, as TBW’s independent auditor, made and supplied false information during the course of its professional audits of TBW, as a result of which Freddie Mac incurred damages in excess of $1.3 billion. Freddie Mac seeks damages and interest, as well as costs. On October 8, 2014, Deloitte removed the case from state court to the U.S. District Court for the Southern District of Florida. At present, it is not possible for us to predict the probable outcome of this lawsuit.
	IRS Litigation
	In 2010 and 2011, we received Statutory Notices from the IRS assessing a total of $3.0 billion of additional income taxes and penalties for the 1998 to 2007 tax years. We filed a petition with the U.S. Tax Court on October 22, 2010 in response to the Statutory Notices for the 1998 to 2005 tax years and, in 2012, paid the tax assessed in the Statutory Notices for the years 2006 and 2007 of $36 million. In the fourth quarter of 2012 we reached an agreement in principle with the IRS for all years, including 2006 and 2007, to favorably resolve the matters in dispute and reduced the previously unrecognized tax benefits to zero. We are currently working with the IRS to finalize the stipulation of settled issues and closing agreement for years 1998 through 2010 related to our tax accounting method for certain hedging transactions, and expect that a final decision can be entered within the next 12 months.
	LIBOR Lawsuit
	On March 14, 2013, Freddie Mac filed a lawsuit in the U.S. District Court for the Eastern District of Virginia against the British Bankers Association and the 16 U.S. Dollar LIBOR panel banks and a number of their affiliates. The case was subsequently transferred to the U.S. District Court for the Southern District of New York. The complaint alleges, among other things, that the defendants fraudulently and collusively depressed LIBOR, a benchmark interest rate indexed to trillions of dollars of financial products, and asserts claims for antitrust violations, breach of contract, tortious interference with contract and fraud. Freddie Mac filed an amended complaint on July 22, 2013, and a second amended complaint on October 6, 2014.
	Litigation Concerning the Purchase Agreement
	Since July 2013, a number of lawsuits have been filed against us concerning the August 2012 amendment to the Purchase Agreement, which created the net worth sweep dividend provisions of the senior preferred stock. The plaintiffs in the lawsuits allege that they are holders of common stock and/or junior preferred stock issued by Freddie Mac and Fannie Mae. (For purposes of this discussion, junior preferred stock refers to the various series of preferred stock of Freddie Mac and Fannie Mae other than the senior preferred stock issued to Treasury.) It is possible that similar lawsuits will be filed in the future. The lawsuits against us are described below.
	In re Fannie Mae/Freddie Mac Senior Preferred Stock Purchase Agreement Class Action Litigations. This case is the result of the consolidation of three putative class action lawsuits filed in the U.S. District Court for the District of Columbia: Cacciapelle and Bareiss vs. Federal National Mortgage Association, Federal Home Loan Mortgage Corporation and FHFA, filed on July 29, 2013; American European Insurance Company vs. Federal National Mortgage Association, Federal Home Loan Mortgage Corporation and FHFA, filed on July 30, 2013; and Marneu Holdings, Co. vs. FHFA, Treasury, Federal National Mortgage Association and Federal Home Loan Mortgage Corporation, filed on September 18, 2013. (The Marneu case was also filed as a shareholder derivative lawsuit.) A consolidated amended complaint was filed on December 3, 2013. In the consolidated amended complaint, plaintiffs allege, among other items, that the August 2012 amendment to the Purchase Agreement breached Freddie Mac's and Fannie Mae's respective contracts with the holders of junior preferred stock and common stock and the covenant of good faith and fair dealing inherent in such contracts. Plaintiffs seek unspecified damages, equitable and injunctive relief, and costs and expenses, including attorney and expert fees.
	The Cacciapelle and American European Insurance Company lawsuits were filed purportedly on behalf of a class of purchasers of junior preferred stock issued by Freddie Mac or Fannie Mae who held stock prior to, and as of, August 17, 2012. The Marneu lawsuit was filed purportedly on behalf of a class of purchasers of junior preferred stock and purchasers of common stock issued by Freddie Mac or Fannie Mae over a not-yet-defined period of time.
	FHFA, joined by Freddie Mac and Fannie Mae, moved to dismiss the consolidated complaint and the other related cases (including the Arrowood case described below) on January 17, 2014. Treasury filed a motion to dismiss the same day. On September 30, 2014, the District Court granted the motions and dismissed the plaintiffs’ claims. On October 15, 2014, plaintiffs filed a notice of appeal of the District Court’s decision. The scope of this appeal includes the American European Insurance Company case described below.
	Arrowood Indemnity Company vs. Federal National Mortgage Association, Federal Home Loan Mortgage Corporation, FHFA and Treasury. This case was filed in the U.S. District Court for the District of Columbia on September 20, 2013. The allegations and demands made by plaintiffs in this case were generally similar to those made by the plaintiffs in the In re Fannie Mae/Freddie Mac Senior Preferred Stock Purchase Agreement Class Action Litigations case described above. Plaintiffs in the Arrowood lawsuit also requested that, if injunctive relief were not granted, the Arrowood plaintiffs be awarded damages against the defendants in an amount to be determined including, but not limited to, the aggregate par value of their junior preferred stock, the total of which they state is $42,297,500. On September 30, 2014, the District Court granted the motion to dismiss the Arrowood complaint and dismissed plaintiffs’ claims. On October 9, 2014, Arrowood filed a notice of appeal of the District Court’s decision.
	American European Insurance Company, Cacciapalle and Miller vs. Treasury and FHFA. This case was filed as a derivative lawsuit, purportedly on behalf of Freddie Mac as a “nominal” defendant, in the U.S. District Court for the District of Columbia on July 30, 2014. The complaint alleges that, through the August 2012 amendment to the Purchase Agreement, Treasury and FHFA breached their respective fiduciary duties to Freddie Mac, causing Freddie Mac to suffer damages. The plaintiffs ask that Freddie Mac be awarded compensatory damages and disgorgement, as well as attorneys’ fees, costs and other expenses. On September 30, 2014, the District Court dismissed plaintiffs’ claims. However, the scope of the October 15, 2014 appeal described above includes this action.
	Reid and Fisher vs. the United States of America and Federal Home Loan Mortgage Corporation. This case was filed as a derivative lawsuit, purportedly on behalf of Freddie Mac as a “nominal” defendant, in the U.S. Court of Federal Claims on February 26, 2014. The complaint alleges, among other items, that the net worth sweep dividend provisions of the senior preferred stock constitute an unlawful taking of private property for public use without just compensation. The plaintiffs ask that Freddie Mac be awarded just compensation for the U.S. government’s alleged taking of its property, attorneys’ fees, costs and other expenses.
	Rafter, Rattien and Pershing Square Capital Management vs. the United States of America, Federal National Mortgage Association and Federal Home Loan Mortgage Corporation. This case was filed as a derivative lawsuit, purportedly on behalf of Freddie Mac as a “nominal” defendant, in the U.S. Court of Federal Claims on August 14, 2014. The complaint alleges that: (a) the net worth sweep dividend provisions of the senior preferred stock constitute an unlawful taking of private property for public use without just compensation; and (b) the U.S government breached an implied-in-fact contract with Freddie Mac. The plaintiffs ask that they be awarded just compensation for the U.S. government’s alleged taking of their property, attorneys’ fees, costs and expenses, and that Freddie Mac be awarded damages or other appropriate relief for the alleged breach of contract.
	At present, it is not possible for us to predict the probable outcome of these lawsuits (including the outcome of any appeal) or any potential effect on our business, financial condition, liquidity, or results of operations. In addition, we are unable to reasonably estimate the possible loss or range of possible loss in the event of an adverse judgment in the foregoing matters due to a number of factors, including the inherent uncertainty of pre-trial litigation. In addition, with respect to the In re Fannie Mae/Freddie Mac Senior Preferred Stock Purchase Agreement Class Action Litigations case, the plaintiffs have not demanded a stated amount of damages they believe are due, and the Court has not certified a class.
	Since October 2013, we have received a number of letters from purported holders of common stock and/or junior preferred stock. The purported shareholders made various demands in these letters, including that Freddie Mac take action to terminate the August 2012 amendment to the Purchase Agreement and commence legal action against the U.S. government to recover all losses sustained by Freddie Mac as a result of such amendment. FHFA (as Conservator) has generally informed the purported shareholders that the Conservator does not intend to authorize Freddie Mac or its directors or officers to take the various actions that such shareholders demand. All of the purported shareholders subsequently filed shareholder derivative lawsuits against Freddie Mac. These cases are among those described above. It is possible we could receive additional demand letters from purported shareholders, which could ultimately lead to additional lawsuits against us.

Regulatory_Capital

Regulatory Capital	9 Months Ended
	Sep. 30, 2014
Mortgage Banking [Abstract]	'
REGULATORY CAPITAL	'
	NOTE 18: REGULATORY CAPITAL
	On October 9, 2008, FHFA announced that it was suspending capital classification of us during conservatorship in light of the Purchase Agreement. FHFA continues to closely monitor our capital levels, but the existing statutory and FHFA-directed regulatory capital requirements are not binding during conservatorship. We continue to provide quarterly submissions to FHFA on minimum capital, but no longer provide submissions on risk-based capital. For more information on regulatory capital, see "NOTE 18: REGULATORY CAPITAL" in our 2013 Annual Report.
	The table below summarizes our minimum capital requirements and deficits and net worth.
	Table 18.1 — Net Worth and Minimum Capital
		30-Sep-14			31-Dec-13
		(in millions)
	GAAP net worth(1)	$	5,186		$	12,835
	Core capital (deficit)(2)(3)	$	(68,856	)	$	(59,495	)
	Less: Minimum capital requirement(2)	19,711			21,404
	Minimum capital surplus (deficit)(2)	$	(88,567	)	$	(80,899	)
	-1	Net worth (deficit) represents the difference between our assets and liabilities under GAAP.
	-2	Core capital and minimum capital figures for September 30, 2014 are estimates. FHFA is the authoritative source for our regulatory capital.
	-3	Core capital excludes certain components of GAAP total equity (i.e., AOCI and the liquidation preference of the senior preferred stock) as these items do not meet the statutory definition of core capital.
	Following our entry into conservatorship and consistent with the objectives of conservatorship, we have focused our risk and capital management on, among other things, maintaining a positive balance of GAAP equity in order to reduce the likelihood that we will need to make additional draws on the Purchase Agreement with Treasury. The Purchase Agreement provides that, if FHFA determines as of quarter end that our liabilities have exceeded our assets under GAAP, Treasury will contribute funds to us in an amount at least equal to the difference between such liabilities and assets.
	Under the GSE Act, FHFA must place us into receivership if FHFA determines in writing that our assets are and have been less than our obligations for a period of 60 days. FHFA has notified us that the measurement period for any mandatory receivership determination with respect to our assets and obligations would commence no earlier than the SEC public filing deadline for our quarterly or annual financial statements and would continue for 60 calendar days after that date. FHFA has advised us that, if, during that 60-day period, we receive funds from Treasury in an amount at least equal to the deficiency amount under the Purchase Agreement, the Director of FHFA will not make a mandatory receivership determination. If funding has been requested under the Purchase Agreement to address a deficit in our net worth, and Treasury is unable to provide us with such funding within the 60-day period specified by FHFA, FHFA would be required to place us into receivership if our assets remain less than our obligations during that 60-day period.
	At September 30, 2014, our assets exceeded our liabilities under GAAP; therefore no draw is being requested from Treasury under the Purchase Agreement. As of September 30, 2014, our aggregate funding received from Treasury under the Purchase Agreement was $71.3 billion. This aggregate funding amount does not include the initial $1 billion liquidation preference of senior preferred stock that we issued to Treasury in September 2008 as an initial commitment fee and for which no cash was received. We paid quarterly dividends of $10.4 billion, $4.5 billion, and $1.9 billion on the senior preferred stock in cash in March 2014, June 2014, and September 2014, respectively, at the direction of the Conservator.

Selected_Financial_Statement_L

Selected Financial Statement Line Items	9 Months Ended
	Sep. 30, 2014
Selected Financial Statement Data [Abstract]	'
Selected Financial Statement Line Items	'
	NOTE 19: SELECTED FINANCIAL STATEMENT LINE ITEMS
	The table below presents the significant components of other income (loss) on our consolidated statements of comprehensive income.
	Table 19.1 — Significant Components of Other Income (Loss) on Our Consolidated Statements of Comprehensive Income
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
		(in millions)
	Other income (loss):
	Non-agency mortgage-related securities settlements(1)	$	1,187	$	549	$	6,084	$	660
	Gains (losses) on mortgage loans	168		114		383		(440		)
	Other	441		328		862		919
	Total other income (loss)	$	1,796	$	991	$	7,329	$	1,139
	-1	Settlement agreements primarily related to lawsuits regarding our investments in certain non-agency mortgage-related securities is a significant component of other income during the three and nine months ended September 30, 2014. For more information, see “NOTE 15: CONCENTRATION OF CREDIT AND OTHER RISKS — Non-Agency Mortgage-Related Security Issuers.”
	The table below presents the significant components of other assets and other liabilities on our consolidated balance sheets.
	Table 19.2 — Significant Components of Other Assets and Other Liabilities on Our Consolidated Balance Sheets
		30-Sep-14		31-Dec-13
		(in millions)
	Other assets:
	Accounts and other receivables(1)	$	3,073	$	4,367
	Current income tax receivable	2,014		1,316
	Guarantee asset	1,570		1,611
	All other	1,206		1,245
	Total other assets	$	7,863	$	8,539
	Other liabilities:
	Servicer liabilities	$	1,916	$	2,277
	Guarantee obligation	1,561		1,522
	Accounts payable and accrued expenses	886		886
	All other	1,537		807
	Total other liabilities	$	5,900	$	5,492
	-1	Primarily consists of servicer receivables and other non-interest receivables.
	END OF CONSOLIDATED FINANCIAL STATEMENTS AND ACCOMPANYING NOTES

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Segment Reporting	'
	Our operations consist of three reportable segments, which are based on the type of business activities each performs — Single-family Guarantee, Investments, and Multifamily. Our Single-family Guarantee segment reflects results from our single-family credit guarantee activities. In our Single-family Guarantee segment, we purchase and guarantee single-family mortgage loans originated by our seller/servicers in the primary mortgage market. In most instances, we use the mortgage securitization process to package the loans into guaranteed mortgage-related securities. We guarantee the payment of principal and interest on the mortgage-related securities in exchange for management and guarantee fees. Our Investments segment reflects results from three primary activities: (a) managing the company’s mortgage-related investments portfolio, excluding Multifamily segment investments; (b) managing the treasury function, including funding and liquidity, for the overall company; and (c) managing interest-rate risk for the overall company. In our Investments segment, we invest principally in mortgage-related securities and single-family performing mortgage loans. Our Multifamily segment reflects results from our investment (both purchases and sales), securitization, and guarantee activities in multifamily mortgage loans and securities. In our Multifamily segment, our primary business model is to purchase multifamily mortgage loans for aggregation and then securitization through issuance of multifamily K Certificates. See “NOTE 13: SEGMENT REPORTING” in our 2013 Annual Report for additional information.
Basis of Presentation	'
	Basis of Presentation
	The accompanying unaudited consolidated financial statements have been prepared in accordance with GAAP for interim financial information and include our accounts as well as the accounts of other entities in which we have a controlling financial interest. All intercompany balances and transactions have been eliminated. These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes in our 2013 Annual Report. We are operating under the basis that we will realize assets and satisfy liabilities in the normal course of business as a going concern and in accordance with the delegation of authority from FHFA to our Board of Directors and management. Certain financial statement information that is normally included in annual financial statements prepared in conformity with GAAP, but is not required for interim reporting purposes, has been condensed or omitted. Certain amounts in prior periods’ consolidated financial statements have been reclassified to conform to the current presentation. In the opinion of management, all adjustments, which include only normal recurring adjustments, have been recorded for a fair presentation of our unaudited consolidated financial statements.
Reclassification	'
	Beginning in the first quarter of 2014, we reclassified net discounts paid on retirements of other debt and net premiums received from issuance of debt securities of consolidated trusts and other debt from cash flows from operating activities to cash flows from financing activities on our consolidated statements of cash flows. This reclassification resulted in a decrease of $1.1 billion to net cash provided by operating activities and an increase of $1.1 billion to net cash used in financing activities for the nine months ended September 30, 2013.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements requires us to make estimates and assumptions that affect: (a) the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements; and (b) the reported amounts of revenues and expenses and gains and losses during the reporting period. Management has made significant estimates in preparing the financial statements, including, but not limited to, establishing the allowance for loan losses and reserve for guarantee losses, valuing financial instruments and other assets and liabilities, assessing impairments on investments, and assessing our ability to realize net deferred tax assets. Actual results could be different from these estimates.
Earnings Per Common Share	'
	Earnings Per Common Share
	The August 2012 amendment to the Purchase Agreement changed the manner in which the dividend on the senior preferred stock is determined. For each quarter from January 1, 2013 through and including December 31, 2017, the dividend payment will be the amount, if any, by which our Net Worth Amount at the end of the immediately preceding fiscal quarter, less the applicable Capital Reserve Amount, exceeds zero. See "NOTE 11: STOCKHOLDERS' EQUITY — Senior Preferred Stock" for additional information regarding the Capital Reserve Amount. For each quarter beginning January 1, 2018, the dividend payment will be the amount, if any, by which our Net Worth Amount at the end of the immediately preceding fiscal quarter exceeds zero. The dividend is presented in the period in which it is determinable for the senior preferred stock as a reduction to net income (loss) available to common stockholders and net income (loss) per common share. The dividend is declared and paid in the following period and recorded as a reduction to equity in the period declared.
	Because we have issued participating securities, we use the “two-class” method of computing earnings per common share. Basic earnings per common share is computed as net income attributable to common stockholders divided by the weighted average common shares outstanding for the period. The weighted average common shares outstanding for the period includes the weighted average number of shares that are associated with the warrant for our common stock issued to Treasury pursuant to the Purchase Agreement. This warrant is included since it is unconditionally exercisable by the holder at a minimal cost. See “NOTE 2: CONSERVATORSHIP AND RELATED MATTERS” in our 2013 Annual Report for further information.
	Diluted earnings per common share is computed as net income attributable to common stockholders divided by the weighted average common shares outstanding during the period adjusted for the dilutive effect of common equivalent shares outstanding. For periods with net income attributable to common stockholders, the calculation includes the effect of the weighted average shares related to stock options if the average market price during the period exceeds the exercise price. During periods in which a net loss attributable to common stockholders has been incurred, potential common equivalent shares outstanding are not included in the calculation because it would have an antidilutive effect. See “NOTE 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES — Earnings Per Common Share” in our 2013 Annual Report for further discussion of our significant accounting policies regarding our calculation of earnings per common share and “NOTE 11: STOCKHOLDERS’ EQUITY — Stock-Based Compensation” in this Form 10-Q for additional information on our earnings-per-share calculation.
Recently Adopted or Issued Accounting Guidance	'
	Recently Adopted Accounting Guidance
	Accounting for Investments in Qualified Affordable Housing Projects
	In the first quarter of 2014, we adopted an amendment to the accounting guidance related to accounting for investments in qualified affordable housing projects. This amendment permitted entities to elect to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions were met. The adoption of this amendment did not have a material impact on our consolidated financial statements.
	Recently Issued Accounting Guidance, Not Yet Adopted Within These Consolidated Financial Statements
	Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share Is More Akin to Debt or to Equity
	In November 2014, the FASB issued an amendment to the accounting guidance on derivatives and hedging related to evaluating host contracts in hybrid financial instruments that are issued in the form of a share. This accounting guidance clarifies that an entity should determine the nature of the host contract by considering all stated and implied substantive terms and features of the hybrid financial instrument, weighing each term and feature on the basis of relevant facts and circumstances. This accounting guidance is effective for interim and annual periods beginning after December 15, 2015. We do not expect that the adoption of this amendment will have a material impact on our consolidated financial statements.
	Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure
	In August 2014, the FASB issued an amendment to the accounting guidance for receivables related to certain government-guaranteed mortgage loans. This accounting guidance requires that a mortgage loan be de-recognized and a separate receivable be recognized upon foreclosure if certain conditions are met. If those conditions are met and such a receivable is recognized, the receivable should be measured based on the amount of principal and interest related to the loan expected to be recovered from the guarantor. This accounting guidance is effective for interim and annual periods beginning after December 15, 2014. We do not expect that the adoption of this amendment will have a material impact on our consolidated financial statements.
	Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures
	In June 2014, the FASB issued an amendment to the accounting guidance for transfers and servicing related to repurchase agreements and other similar transactions. This accounting guidance requires repurchase-to-maturity transactions to be accounted for as secured borrowings and requires separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty. This accounting guidance is effective for interim and annual periods beginning after December 15, 2014. We are evaluating the impact that the adoption of this amendment will have on our consolidated financial statements.
	Revenue from Contracts with Customers
	In May 2014, the FASB issued an amendment to the accounting guidance related to the recognition of revenue. This accounting guidance requires entities to recognize revenue to depict the transfer of promised goods or services to customers in amounts that reflect the consideration to which the entity expects to be entitled in exchange for those goods or services. This accounting guidance is effective for interim and annual periods beginning after December 15, 2016. We are evaluating the impact that the adoption of this amendment will have on our consolidated financial statements.
	Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure
	In January 2014, the FASB issued an amendment to the accounting guidance related to reclassifying residential real estate collateralized consumer mortgage loans upon foreclosure. This amendment clarifies that a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either: (a) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure; or (b) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. This amendment is effective for interim and annual periods beginning after December 15, 2014. We do not expect that the adoption of this amendment will have a material impact on our consolidated financial statements.

Variable_Interest_Entities_Tab

Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Table - Variable Interests in VIEs for Which We are not the Primary Beneficiary	'
	Table 3.1 — Variable Interests in VIEs for which We are not the Primary Beneficiary
		30-Sep-14
		Mortgage-Related						Unsecuritized
		Security Trusts						Multifamily
		Freddie  Mac			Non-Freddie Mac			Loans (3)			Other(2)
		Securities(1)			Securities(2)
		(in millions)
	Assets and Liabilities Recorded on our Consolidated Balance Sheets
	Assets:
	Restricted cash and cash equivalents	$	12		$	—		$	10		$	66
	Investments in securities:
	Available-for-sale, at fair value	41,363			68,921			—			—
	Trading, at fair value	14,900			6,372			—			—
	Mortgage loans:
	Held-for-investment, unsecuritized	—			—			43,942			—
	Held-for-sale	—			—			7,719			—
	Accrued interest receivable	233			182			217			7
	Other assets	876			3			268			470
	Liabilities:
	Derivative liabilities, net	—			—			—			(32		)
	Other liabilities	(959		)	—			(18		)	(602		)
	Maximum Exposure to Loss	$	81,383		$	72,919		$	52,156		$	10,282
	Total Assets of Non-Consolidated VIEs(4)	$	95,740		$	395,650		$	94,567		$	22,619
		December 31, 2013
		Mortgage-Related						Unsecuritized
		Security Trusts						Multifamily
		Freddie Mac			Non-Freddie Mac			Loans(3)			Other(2)
		Securities(1)			Securities(2)
		(in millions)
	Assets and Liabilities Recorded on our Consolidated Balance Sheets
	Assets:
	Restricted cash and cash equivalents	$	6		$	—		$	8		$	58
	Investments in securities:
	Available-for-sale, at fair value	40,659			84,765			—			—
	Trading, at fair value	9,349			7,414			—			—
	Mortgage loans:
	Held-for-investment, unsecuritized	—			—			50,306			—
	Held-for-sale	—			—			8,727			—
	Accrued interest receivable	232			226			261			7
	Other assets	833			14			407			477
	Liabilities:
	Derivative liabilities, net	(3		)	—			—			(35		)
	Other liabilities	(875		)	(2		)	(12		)	(558		)
	Maximum Exposure to Loss	$	72,072		$	92,559		$	59,710		$	10,415
	Total Assets of Non-Consolidated VIEs(4)	$	84,731		$	506,699		$	105,120		$	23,707
	-1	Freddie Mac securities include our variable interests in single-family multiclass REMICs and Other Structured Securities, multifamily PCs, multifamily Other Structured Securities, and Other Guarantee Transactions that we do not consolidate. Our maximum exposure to loss includes guaranteed UPB of assets held by the non-consolidated VIEs related to multifamily PCs, multifamily Other Structured Securities, and Other Guarantee Transactions for which we record a guarantee asset (component of Other Assets) and guarantee obligation (component of Other Liabilities) on our consolidated balance sheets. Our maximum exposure to loss on Freddie Mac securities excludes investments in single-family multiclass REMICs and Other Structured Securities, because we already consolidate the collateral of these trusts on our consolidated balance sheets.
	-2	For our involvement with non-consolidated non-Freddie Mac security trusts, and certain other VIEs where we do not provide a guarantee, our maximum exposure to loss is computed as the carrying amount if the security is classified as trading or the amortized cost if the security is classified as available-for-sale for our investments and related assets recorded on our consolidated balance sheets. See “NOTE 7: INVESTMENTS IN SECURITIES” for additional information regarding our non-Freddie Mac securities.
	-3	For unsecuritized multifamily loans, our maximum exposure to loss includes accrued interest receivable associated with these loans. See “NOTE 4: MORTGAGE LOANS AND LOAN LOSS RESERVES” for additional information about our unsecuritized multifamily loans.
	-4	Except for unsecuritized multifamily loans, this represents the remaining UPB of assets held by non-consolidated VIEs using the most current information available. For unsecuritized multifamily loans, this represents the fair value of the property serving as collateral for the loan. We do not include the assets of our non-consolidated trusts related to single-family REMICs and Other Structured Securities backed by our PCs in this amount as we already consolidate the underlying collateral of these trusts on our consolidated balance sheets.

Mortgage_Loans_and_Loan_Loss_R1

Mortgage Loans and Loan Loss Reserves (Tables)	9 Months Ended
	Sep. 30, 2014
Mortgage Loans on Real Estate [Abstract]	'
Table - Mortgage Loans	'
	Table 4.1 — Mortgage Loans
		30-Sep-14									31-Dec-13
		Unsecuritized			Held By			Total			Unsecuritized			Held By			Total
					Consolidated									Consolidated
					Trusts									Trusts
		(in millions)
	Single-family:(1)
	Fixed-rate
	Amortizing	$	106,068		$	1,424,474		$	1,530,542		$	113,597		$	1,402,841		$	1,516,438
	Interest-only	1,031			3,607			4,638			1,476			4,826			6,302
	Total fixed-rate	107,099			1,428,081			1,535,180			115,073			1,407,667			1,522,740
	Adjustable-rate
	Amortizing	1,644			67,330			68,974			1,935			65,429			67,364
	Interest-only	3,522			21,054			24,576			4,576			23,841			28,417
	Total adjustable-rate	5,166			88,384			93,550			6,511			89,270			95,781
	Other Guarantee Transactions	—			7,366			7,366			—			8,431			8,431
	FHA/VA and other governmental	503			3,191			3,694			553			3,354			3,907
	Total single-family	112,768			1,527,022			1,639,790			122,137			1,508,722			1,630,859
	Multifamily:(1)
	Fixed-rate	44,038			525			44,563			50,701			444			51,145
	Adjustable-rate	7,613			—			7,613			8,467			—			8,467
	Other governmental	3			—			3			3			—			3
	Total multifamily	51,654			525			52,179			59,171			444			59,615
	Total UPB of mortgage loans	164,422			1,527,547			1,691,969			181,308			1,509,166			1,690,474
	Deferred fees, unamortized premiums, discounts and other cost basis adjustments	(3,615		)	25,087			21,472			(4,817		)	23,745			18,928
	Fair value adjustments on loans held-for sale(2)	104			—			104			6			—			6
	Allowance for loan losses on mortgage loans held-for-investment	(19,473		)	(3,101		)	(22,574		)	(21,612		)	(3,006		)	(24,618		)
	Total mortgage loans, net	$	141,438		$	1,549,533		$	1,690,971		$	154,885		$	1,529,905		$	1,684,790
	Mortgage loans, net:
	Held-for-investment	$	133,719		$	1,549,533		$	1,683,252		$	146,158		$	1,529,905		$	1,676,063
	Held-for-sale	7,719			—			7,719			8,727			—			8,727
	Total mortgage loans, net	$	141,438		$	1,549,533		$	1,690,971		$	154,885		$	1,529,905		$	1,684,790
	-1	Based on UPB.
	-2	Consists of fair value adjustments associated with multifamily mortgage loans (for which we have made a fair value election).
Table - Recorded Investment of Held-For-Invstment Mortgage Loans, by LTV Ratio	'
	Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio
		As of September 30, 2014												As of December 31, 2013
		Estimated Current LTV Ratio(1)												Estimated Current LTV Ratio(1)
		≤ 80			> 80 to 100			> 100(2)			Total			≤ 80			> 80 to 100			> 100(2)			Total
		(in millions)
	Single-family loans:
	20 and 30-year or more, amortizing fixed-rate(3)	$	890,035		$	258,552		$	94,120		$	1,242,707		$	819,509		$	269,110		$	124,491		$	1,213,110
	15-year amortizing fixed-rate(3)	266,528			15,039			3,931			285,498			270,211			19,658			5,748			295,617
	Adjustable-rate(4)	59,173			6,641			871			66,685			56,208			6,714			1,578			64,500
	Alt-A, interest-only, and option ARM(5)	29,261			18,985			18,142			66,388			29,927			21,564			25,089			76,580
	Total single-family loans	$	1,244,997		$	299,217		$	117,064		1,661,278			$	1,175,855		$	317,046		$	156,906		1,649,807
	Multifamily loans										44,548												50,874
	Total recorded investment of held-for-investment loans										$	1,705,826											$	1,700,681
	-1	The current LTV ratios are management estimates, which are updated on a monthly basis. Current market values are estimated by adjusting the value of the property at origination based on changes in the market value of homes in the same geographic area since that time. The value of a property at origination is based on: (a) for purchase mortgages, either the lesser of the appraised value of the property at the time of mortgage origination or the mortgage borrower’s purchase price; or (b) for refinance mortgages, a third-party appraisal. Changes in market value are derived from our internal index which measures price changes for repeat sales and refinancing activity on the same properties using Freddie Mac and Fannie Mae single-family mortgage acquisitions, including foreclosure sales. Estimates of the current LTV ratio include the credit-enhanced portion of the loan and exclude any secondary financing by third parties. The existence of a second lien reduces the borrower’s equity in the property and, therefore, can increase the risk of default.
	-2	The serious delinquency rate for the total of single-family held-for-investment mortgage loans with estimated current LTV ratios in excess of 100% was 8.9% and 9.9% as of September 30, 2014 and December 31, 2013, respectively.
	-3	The majority of our loan modifications result in new terms that include fixed interest rates after modification. As of September 30, 2014 and December 31, 2013, we have categorized UPB of approximately $42.8 billion and $43.8 billion, respectively, of modified loans as fixed-rate loans (instead of as adjustable rate loans), even though the modified loans have rate adjustment provisions. In these cases, while the terms of the modified loans provide for the interest rate to adjust in the future, such future rates are determined at the time of modification rather than at a subsequent date.
	-4	Includes balloon/reset mortgage loans and excludes option ARMs.
	-5	We have discontinued our purchases of Alt-A, interest-only, and option ARM loans. For reporting purposes: (a) loans within the Alt-A category continue to be presented in that category following modification, even though the borrower may have provided full documentation of assets and income to complete the modification; and (b) loans within the option ARM category continue to be presented in that category following modification, even though the modified loan no longer provides for optional payment provisions.
Table - Detail of Loan Loss Reserves	'
	Table 4.3 — Detail of Loan Loss Reserves
		Three Months Ended September 30,
		2014												2013
		Allowance for Loan Losses						Reserve  for						Allowance for Loan Losses						Reserve  for
								Guarantee												Guarantee
		Unsecuritized			Held By			Losses(1)			Total			Unsecuritized			Held By			Losses(1)			Total
					Consolidated												Consolidated
					Trusts												Trusts
		(dollars in millions)
	Single-family:
	Beginning balance	$	19,956		$	2,652		$	100		$	22,708		$	22,862		$	3,222		$	113		$	26,197
	Provision (benefit) for credit losses	211			378			(5		)	584			(1,528		)	430			(12		)	(1,110		)
	Charge-offs(2)	(1,014		)	(72		)	(2		)	(1,088		)	(1,917		)	(379		)	(2		)	(2,298		)
	Recoveries(3)	184			6			—			190			1,470			260			—			1,730
	Transfers, net(4)	55			137			—			192			1,064			(800		)	—			264
	Ending balance	$	19,392		$	3,101		$	93		$	22,586		$	21,951		$	2,733		$	99		$	24,783
	Multifamily:
	Beginning balance	$	91		$	—		$	16		$	107		$	206		$	—		$	30		$	236
	Provision (benefit) for credit losses	(11		)	—			1			(10		)	(26		)	—			(2		)	(28		)
	Charge-offs(2)	—			—			—			—			(3		)	—			—			(3		)
	Recoveries(3)	1			—			—			1			—			—			—			—
	Ending balance	$	81		$	—		$	17		$	98		$	177		$	—		$	28		$	205
	Total:
	Beginning balance	$	20,047		$	2,652		$	116		$	22,815		$	23,068		$	3,222		$	143		$	26,433
	Provision (benefit) for credit losses	200			378			(4		)	574			(1,554		)	430			(14		)	(1,138		)
	Charge-offs(2)	(1,014		)	(72		)	(2		)	(1,088		)	(1,920		)	(379		)	(2		)	(2,301		)
	Recoveries(3)	185			6			—			191			1,470			260			—			1,730
	Transfers, net(4)	55			137			—			192			1,064			(800		)	—			264
	Ending balance	$	19,473		$	3,101		$	110		$	22,684		$	22,128		$	2,733		$	127		$	24,988
	Ratio of total loan loss reserves (excluding TDR concessions) to net charge-offs for single-family loans(5)										3.1												1.9
	Ratio of total loan loss reserves to net charge-offs for single-family loans(6)										6.3												3.4
		Nine Months Ended September 30,
		2014												2013
		Allowance for Loan Losses						Reserve  for						Allowance for Loan Losses						Reserve  for
								Guarantee												Guarantee
		Unsecuritized			Held By			Losses(1)			Total			Unsecuritized			Held By			Losses(1)			Total
					Consolidated												Consolidated
					Trusts												Trusts
		(in millions)
	Single-family:
	Beginning balance	$	21,487		$	3,006		$	85		$	24,578		$	25,449		$	4,918		$	141		$	30,508
	Provision (benefit) for credit losses	(665		)	745			13			93			(3,182		)	1,117			(32		)	(2,097		)
	Charge-offs(2)	(3,464		)	(298		)	(5		)	(3,767		)	(6,594		)	(691		)	(7		)	(7,292		)
	Recoveries(3)	848			252			—			1,100			2,597			319			—			2,916
	Transfers, net(4)	1,186			(604		)	—			582			3,681			(2,930		)	(3		)	748
	Ending balance	$	19,392		$	3,101		$	93		$	22,586		$	21,951		$	2,733		$	99		$	24,783
	Multifamily:
	Beginning balance	$	125		$	—		$	26		$	151		$	339		$	1		$	42		$	382
	Provision (benefit) for credit losses	(43		)	—			(9		)	(52		)	(159		)	(1		)	(7		)	(167		)
	Charge-offs(2)	(2		)	—			—			(2		)	(4		)	—			—			(4		)
	Recoveries(3)	1			—			—			1			1			—			—			1
	Transfers, net(4)	—			—			—			—			—			—			(7		)	(7		)
	Ending balance	$	81		$	—		$	17		$	98		$	177		$	—		$	28		$	205
	Total:
	Beginning balance	$	21,612		$	3,006		$	111		$	24,729		$	25,788		$	4,919		$	183		$	30,890
	Provision (benefit) for credit losses	(708		)	745			4			41			(3,341		)	1,116			(39		)	(2,264		)
	Charge-offs(2)	(3,466		)	(298		)	(5		)	(3,769		)	(6,598		)	(691		)	(7		)	(7,296		)
	Recoveries(3)	849			252			—			1,101			2,598			319			—			2,917
	Transfers, net(4)	1,186			(604		)	—			582			3,681			(2,930		)	(10		)	741
	Ending balance	$	19,473		$	3,101		$	110		$	22,684		$	22,128		$	2,733		$	127		$	24,988
	-1	Loans associated with our reserve for guarantee losses are those loans that underlie our non-consolidated securitization trusts and other guarantee commitments and are evaluated for impairment on a collective basis. Our reserve for guarantee losses is included in other liabilities on our consolidated balance sheets.
	-2	Charge-offs represent the amount of a loan that has been discharged to remove the loan from our consolidated balance sheet principally due to either foreclosure transfers or short sales. Charge-offs exclude $21 million and $63 million for the three months ended September 30, 2014 and 2013, respectively, and $59 million and $204 million for the nine months ended September 30, 2014 and 2013, respectively, related to: (a) amounts recorded as losses on loans purchased within other expenses on our consolidated statements of comprehensive income, which relate to certain loans purchased under financial guarantees; or (b) cumulative fair value losses recognized through the date of foreclosure for multifamily loans which we elected to carry at fair value at the time of our purchase. We record charge-offs and recoveries on loans held by consolidated trusts when a loss event (such as a foreclosure transfer or foreclosure alternative) occurs on a loan while it remains in a consolidated trust.
	-3	Recoveries of charge-offs primarily result from foreclosure alternatives and REO acquisitions on loans where: (a) a share of default risk has been assumed by mortgage insurers, servicers, or other third parties through certain credit enhancements; or (b) we received a reimbursement of our losses from a seller/servicer associated with a repurchase request on a loan that experienced a foreclosure transfer or a foreclosure alternative.
-4	Consists of: (a) approximately $(0.1) billion and $0.8 billion during the three months ended September 30, 2014 and 2013, respectively, and $0.6 billion and $2.9 billion during the nine months ended September 30, 2014 and 2013, respectively, of reclassified single-family reserves related to our removal of loans previously held by consolidated trusts, net of reclassifications for single-family loans subsequently resecuritized after such removal; and (b) approximately $0.2 billion and $0.3 billion during the three months ended September 30, 2014 and 2013, respectively, and $0.6 billion and $0.7 billion during the nine months ended September 30, 2014 and 2013, respectively, attributable to capitalization of past due interest on modified mortgage loans.
-5	Calculated as: (a) the total loan loss reserve balance for single-family loans less our estimate of reserve amounts associated with TDR concessions as of September 30, 2014 and September 30, 2013; divided by (b) the annualized charge-offs, net of recoveries (excluding recoveries for settlement related amounts), associated with single-family loans during the three months ended September 30, 2014 and September 30, 2013, respectively. Both the charge-offs and loan loss reserves exclude amounts associated with loans acquired with deteriorated credit (at the time of our acquisition).
-6	Calculated as: (a) the total loan loss reserve balance for single-family loans as of September 30, 2014 and September 30, 2013; divided by (b) the annualized charge-offs, net of recoveries (excluding recoveries for settlement related amounts), associated with single-family loans during the three months ended September 30, 2014 and September 30, 2013, respectively. Both the charge-offs and loan loss reserves exclude amounts associated with loans acquired with deteriorated credit quality (at the time of our acquisition).
Table - Net Investment in Mortgage Loans	'
	Table 4.4 — Net Investment in Mortgage Loans
		30-Sep-14									31-Dec-13
		Single-family			Multifamily			Total			Single-family			Multifamily			Total
		(in millions)
	Recorded investment:
	Collectively evaluated	$	1,561,107		$	43,559		$	1,604,666		$	1,551,667		$	49,598		$	1,601,265
	Individually evaluated	100,171			989			101,160			98,140			1,276			99,416
	Total recorded investment	1,661,278			44,548			1,705,826			1,649,807			50,874			1,700,681
	Ending balance of the allowance for loan losses:
	Collectively evaluated	(4,294		)	(28		)	(4,322		)	(5,939		)	(45		)	(5,984		)
	Individually evaluated	(18,199		)	(53		)	(18,252		)	(18,554		)	(80		)	(18,634		)
	Total ending balance of the allowance	(22,493		)	(81		)	(22,574		)	(24,493		)	(125		)	(24,618		)
	Net investment in mortgage loans	$	1,638,785		$	44,467		$	1,683,252		$	1,625,314		$	50,749		$	1,676,063
Table - Recourse and other forms of credit protection	'
	Table 4.5 — Recourse and Other Forms of Credit Protection(1)
		UPB at						Maximum Coverage(2) at
		30-Sep-14			31-Dec-13			30-Sep-14			31-Dec-13
		(in millions)
	Single-family:
	Primary mortgage insurance	$	220,471		$	203,470		$	55,941		$	50,823
	Other credit protection:
	Credit risk transfer transactions(3)	132,172			56,903			5,515			1,183
	Lender recourse and indemnifications	6,693			7,119			6,235			6,726
	Pool insurance(4)	3,380			4,683			988			1,186
	HFA indemnification(5)	3,466			4,051			3,323			3,323
	Subordination(6)	2,442			2,644			347			399
	Other credit enhancements	20			38			20			38
	Total	$	368,644		$	278,908		$	72,369		$	63,678
	Multifamily:
	K Certificates(7)	$	69,218		$	59,326		$	12,412		$	10,601
	Subordination(6)	4,418			4,435			756			756
	HFA indemnification(5)	827			905			699			699
	Other credit enhancements	5,855			6,666			1,685			1,834
	Total	$	80,318		$	71,332		$	15,552		$	13,890
	-1	Excludes: (a) FHA/VA and other governmental loans; (b) purchased credit protection associated with $10.2 billion and $11.5 billion in UPB of single-family loans underlying Other Guarantee Transactions as of September 30, 2014 and December 31, 2013, respectively; and (c) repurchase rights (subject to certain conditions and limitations) we have under representations and warranties provided by our agreements with seller/servicers to underwrite loans and service them in accordance with our standards.
	-2	Except for subordination and K Certificates, this represents the remaining amount of loss recovery that is available subject to terms of counterparty agreements. For subordination and K Certificates coverage, this represents the UPB of the securities that are subordinate to our guarantee, which could provide protection by absorbing first losses.
	-3	Represents: (a) STACR debt note transactions in which we issue and sell debt securities, the principal balance of which is subject to the performance of a reference pool of single-family mortgage loans owned or guaranteed by Freddie Mac; and (b) transactions in which we purchased insurance policies on a portion of the mezzanine loss positions that were not issued to third parties in certain STACR debt note transactions. UPB amounts presented represent the UPB of the loans in the associated reference pools as of the respective dates, excluding $42.0 billion at September 30, 2014 where the related loans are also covered by primary mortgage insurance. Maximum coverage amounts presented represent the outstanding balance of the debt securities held by third parties as well as the remaining aggregate limit of insurance purchased from third parties in ACIS transactions.
	-4	Maximum coverage amounts presented have been limited to the UPB at period end. Excludes approximately $1.4 billion and $1.8 billion in UPB at September 30, 2014 and December 31, 2013, respectively, where the related loans are also covered by primary mortgage insurance.
	-5	Represents the amount of potential reimbursement of losses on securities we have guaranteed that are backed by state and local HFA bonds related to the HFA initiative.
	-6	Represents Freddie Mac issued mortgage-related securities with subordination protection, excluding multifamily K Certificates and those securities backed by state and local HFA bonds related to the HFA initiative.
	-7	Represents multifamily K Certificates with subordination protection.

Impaired_Loans_Tables

Impaired Loans (Tables)	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Table - Individually Impaired Loans	'
	Table 5.1 — Individually Impaired Loans
			Balance at September 30, 2014															For the Three Months Ended September 30, 2014								For the Nine Months Ended September 30, 2014
			UPB				Recorded				Associated				Net			Average			Interest			Interest		Average		Interest		Interest
							Investment				Allowance				Investment			Recorded			Income			Income		Recorded		Income		Income
																		Investment			Recognized			Recognized		Investment		Recognized		Recognized
																								On Cash						On Cash
																								Basis(1)						Basis(1)
			(in millions)
	Single-family —
	With no specific allowance recorded(2):
	20 and 30-year or more, amortizing fixed-rate(3)		$	6,051			$	3,932			N/A				$	3,932		$	3,941		$	105		$	12	$	3,618	$	277	$	27
	15-year amortizing fixed-rate(3)		66				45				N/A				45			45			3			—		37		7		1
	Adjustable-rate(4)		29				22				N/A				22			22			—			—		15		1		—
	Alt-A, interest-only, and option ARM(5)		1,718				1,149				N/A				1,149			1,151			22			2		1,119		60		4
	Total with no specific allowance recorded		7,864				5,148				N/A				5,148			5,159			130			14		4,789		345		32
	With specific allowance recorded:(6)
	20 and 30-year or more, amortizing fixed-rate(3)		77,543				76,419				$	(14,311	)		62,108			76,001			588			82		75,562		1,760		213
	15-year amortizing fixed-rate(3)		1,253				1,259				(40		)		1,219			1,225			13			3		1,255		41		7
	Adjustable-rate(4)		874				872				(68		)		804			857			5			2		891		17		4
	Alt-A, interest-only, and option ARM(5)		16,881				16,473				(3,780		)		12,693			16,410			95			19		16,531		286		46
	Total with specific allowance recorded		96,551				95,023				(18,199		)		76,824			94,493			701			106		94,239		2,104		270
	Combined single-family:
	20 and 30-year or more, amortizing fixed-rate(3)		83,594				80,351				(14,311		)		66,040			79,942			693			94		79,180		2,037		240
	15-year amortizing fixed-rate(3)		1,319				1,304				(40		)		1,264			1,270			16			3		1,292		48		8
	Adjustable-rate(4)		903				894				(68		)		826			879			5			2		906		18		4
	Alt-A, interest-only, and option ARM(5)		18,599				17,622				(3,780		)		13,842			17,561			117			21		17,650		346		50
	Total single-family(7)		$	104,415			$	100,171			$	(18,199	)		$	81,972		$	99,652		$	831		$	120	$	99,028	$	2,449	$	302
	Multifamily —
	With no specific allowance recorded(8)		$	532			$	521			N/A				$	521		$	526		$	8		$	2	$	656	$	24	$	7
	With specific allowance recorded		476				468				$	(53	)		415			474			6			4		521		19		13
	Total multifamily		$	1,008			$	989			$	(53	)		$	936		$	1,000		$	14		$	6	$	1,177	$	43	$	20
	Total single-family and multifamily		$	105,423			$	101,160			$	(18,252	)		$	82,908		$	100,652		$	845		$	126	$	100,205	$	2,492	$	322
			Balance at December 31, 2013															For the Three Months Ended September 30, 2013								For the Nine Months Ended September 30, 2013
			UPB				Recorded Investment				Associated				Net			Average			Interest			Interest		Average		Interest		Interest
											Allowance				Investment			Recorded			Income			Income		Recorded		Income		Income
																		Investment			Recognized			Recognized		Investment		Recognized		Recognized
																								On Cash						On Cash
																								Basis(1)						Basis(1)
		(in millions)
	Single-family —
	With no specific allowance recorded(2):
	20 and 30-year or more, amortizing fixed-rate(3)		$	5,927			$	3,355			N/A				$	3,355		$	3,430		$	100		$	7	$	3,346	$	304	$	27
	15-year amortizing fixed-rate(3)		62				34				N/A				34			32			1			—		30		5		1
	Adjustable rate(4)		19				13				N/A				13			14			—			—		13		1		—
	Alt-A, interest-only, and option ARM(5)		1,758				1,038				N/A				1,038			1,016			18			—		957		53		5
	Total with no specific allowance recorded		7,766				4,440				N/A				4,440			4,492			119			7		4,346		363		33
	With specific allowance recorded:(6)
	20 and 30-year or more, amortizing fixed-rate(3)		75,633				74,554				$	(14,431	)		60,123			70,632			518			63		68,962		1,571		218
	15-year amortizing fixed-rate(3)		1,324				1,324				(43		)		1,281			1,115			12			3		1,095		37		8
	Adjustable rate(4)		967				962				(84		)		878			862			5			1		848		16		4
	Alt-A, interest-only, and option ARM(5)		17,210				16,860				(3,996		)		12,864			16,514			84			10		16,508		273		53
	Total with specific allowance recorded		95,134				93,700				(18,554		)		75,146			89,123			619			77		87,413		1,897		283
	Combined single-family:
	20 and 30-year or more, amortizing fixed-rate(3)		81,560				77,909				(14,431		)		63,478			74,062			618			70		72,308		1,875		245
	15-year amortizing fixed-rate(3)		1,386				1,358				(43		)		1,315			1,147			13			3		1,125		42		9
	Adjustable rate (4)		986				975				(84		)		891			876			5			1		861		17		4
	Alt-A, interest-only, and option ARM(5)		18,968				17,898				(3,996		)		13,902			17,530			102			10		17,465		326		58
	Total single-family(7)		$	102,900			$	98,140			$	(18,554	)		$	79,586		$	93,615		$	738		$	84	$	91,759	$	2,260	$	316
	Multifamily —
	With no specific allowance recorded(8)		$	694			$	681			N/A				$	681		$	848		$	11		$	4	$	1,099	$	39	$	16
	With specific allowance recorded		608				595				$	(80	)		515			761			10			8		888		33		27
	Total multifamily		$	1,302			$	1,276			$	(80	)		$	1,196		$	1,609		$	21		$	12	$	1,987	$	72	$	43
	Total single-family and multifamily		$	104,202			$	99,416			$	(18,634	)		$	80,782		$	95,224		$	759		$	96	$	93,746	$	2,332	$	359
-1	Consists of income recognized during the period related to loans categorized as non-accrual.
-2	Individually impaired loans with no specific related valuation allowance primarily represent mortgage loans removed from PC pools and accounted for in accordance with the accounting guidance for loans and debt securities acquired with deteriorated credit quality that have not experienced further deterioration.
-3	See endnote (3) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
-4	Includes balloon/reset mortgage loans and excludes option ARMs.
-5	See endnote (5) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
-6	Consists primarily of mortgage loans classified as TDRs.
-7	As of September 30, 2014 and December 31, 2013 includes $96.6 billion and $95.1 billion, respectively, of UPB associated with loans for which we have recorded a specific allowance, and $7.9 billion and $7.8 billion, respectively, of UPB associated with loans that have no specific allowance recorded. See endnote (2) for additional information.
-8	Individually impaired multifamily loans with no specific related valuation allowance primarily represent those loans for which the collateral value is sufficiently in excess of the loan balance to result in recovery of the entire recorded investment if the property were foreclosed upon or otherwise subject to disposition.
Table - Payment Status of Mortgage Loans	'
	Table 5.2 — Payment Status of Mortgage Loans(1)
		30-Sep-14
		Current				One				Two				Three Months or			Total			Non-accrual
						Month				Months				More Past Due,
						Past Due				Past Due				or in Foreclosure
		(in millions)
	Single-family:
	20 and 30-year or more, amortizing fixed-rate(2)	$	1,194,713			$	17,839			$	5,955			$	24,200		$	1,242,707		$	24,195
	15-year amortizing fixed-rate(2)	283,527				1,021				234				716			285,498			716
	Adjustable-rate(3)	65,472				426				121				666			66,685			666
	Alt-A, interest-only, and option ARM(4)	55,466				2,367				969				7,586			66,388			7,584
	Total single-family	1,599,178				21,653				7,279				33,168			1,661,278			33,161
	Total multifamily	44,535				—				4				9			44,548			411
	Total single-family and multifamily	$	1,643,713			$	21,653			$	7,283			$	33,177		$	1,705,826		$	33,572
		December 31, 2013
		Current				One				Two				Three Months or			Total			Non-accrual
						Month				Months				More Past Due,
						Past Due				Past Due				or in Foreclosure
		(in millions)
	Single-family:
	20 and 30-year or more, amortizing fixed-rate(2)	$	1,157,057			$	19,743			$	6,675			$	29,635		$	1,213,110		$	29,620
	15-year amortizing fixed-rate(2)	293,286				1,196				271				864			295,617			863
	Adjustable-rate(3)	62,987				495				147				871			64,500			871
	Alt-A, interest-only, and option ARM(4)	62,356				2,898				1,157				10,169			76,580			10,162
	Total single-family	1,575,686				24,332				8,250				41,539			1,649,807			41,516
	Total multifamily	50,827				—				21				26			50,874			627
	Total single-family and multifamily	$	1,626,513			$	24,332			$	8,271			$	41,565		$	1,700,681		$	42,143
	-1	Based on recorded investment in the loan. Mortgage loans that have been modified are not counted as past due as long as the borrower is current under the modified terms. The payment status of a loan may be affected by temporary timing differences, or lags, in the reporting of this information to us by our servicers.
	-2	See endnote (3) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
	-3	Includes balloon/reset mortgage loans and excludes option ARMs.
	-4	See endnote (5) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
Table - Delinquency Rates	'
	Table 5.3 — Delinquency Rates
		30-Sep-14				31-Dec-13
	Single-family:(1)
	Non-credit-enhanced portfolio
	Serious delinquency rate	1.8		%		2.09		%
	Total number of seriously delinquent loans	155,955				190,119
	Credit-enhanced portfolio:(2)
	Primary mortgage insurance:
	Serious delinquency rate	2.84		%		4.4		%
	Total number of seriously delinquent loans	40,003				51,600
	Other credit protection:(3)
	Serious delinquency rate	1.41		%		3.66		%
	Total number of seriously delinquent loans	13,064				15,828
	Total single-family:
	Serious delinquency rate	1.96		%		2.39		%
	Total number of seriously delinquent loans	207,862				255,325
	Multifamily:(4)
	Non-credit-enhanced portfolio:
	Delinquency rate	0.02		%		0.07		%
	UPB of delinquent loans (in millions)	$	13			$	46
	Credit-enhanced portfolio:
	Delinquency rate	0.03		%		0.11		%
	UPB of delinquent loans (in millions)	$	26			$	75
	Total Multifamily:
	Delinquency rate	0.03		%		0.09		%
	UPB of delinquent loans (in millions)	$	39			$	121
	-1	Single-family mortgage loans that have been modified are not counted as seriously delinquent if the borrower is less than three monthly payments past due under the modified terms. Serious delinquencies on single-family mortgage loans underlying certain REMICs and Other Structured Securities, Other Guarantee Transactions, and other guarantee commitments may be reported on a different schedule due to variances in industry practice. In the third quarter of 2014, we revised our presentation of single-family non-credit enhanced and credit-enhanced serious delinquency rates. This revision did not impact our total single-family serious delinquency rate. Prior periods have been revised to conform with the current presentation.
	-2	The credit enhanced categories are not mutually exclusive as a single loan may be covered by both primary mortgage insurance and other credit protection.
	-3	Consists of single-family mortgage loans covered by financial arrangements (other than primary mortgage insurance) that are designed to reduce our credit risk exposure, including loans in reference pools of mortgages covered by STACR transactions as well as other forms of credit protection. See "Table 4.5 — Recourse and Other Forms of Credit Protection " for more information.
	-4	Multifamily delinquency performance is based on UPB of mortgage loans that are two monthly payments or more past due or those in the process of foreclosure and includes multifamily Other Guarantee Transactions (e.g., K Certificates). Excludes mortgage loans that have been modified as long as the borrower is less than two monthly payments past due under the modified contractual terms.
Table - TDR Activity, by Segment	'
	Table 5.4 — TDR Activity, by Segment
		Three Months Ended September 30,														Nine Months Ended September 30,
		2014							2013							2014					2013
		Number of Loans			Post-TDR				Number of Loans			Post-TDR				Number of Loans		Post-TDR			Number of Loans		Post-TDR
					Recorded							Recorded						Recorded					Recorded
					Investment							Investment						Investment					Investment
		(dollars in millions)
	Single-family:(1)
	20 and 30-year or more, amortizing fixed-rate(2)	17,194			$	2,518			25,289			$	3,916			52,356		$	7,863		69,681		$	11,149
	15-year amortizing fixed-rate	1,931			139				2,020			156				5,278		394			6,617		486
	Adjustable-rate(3)	397			61				694			122				1,336		207			2,372		382
	Alt-A, interest-only, and option ARM(4)	2,070			418				4,356			952				7,206		1,472			13,063		2,960
	Total Single-family	21,592			3,136				32,359			5,146				66,176		9,936			91,733		14,977
	Multifamily	—			—				3			25				1		10			8		98
	Total	21,592			$	3,136			32,362			$	5,171			66,177		$	9,946		91,741		$	15,075
	-1	The pre-TDR recorded investment for single-family loans initially classified as TDR during the three and nine months ended September 30, 2014 was $3.1 billion and $9.9 billion, respectively, compared to $5.1 billion and $14.9 billion during the three and nine months ended September 30, 2013, respectively.
	-2	See endnote (3) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
	-3	Includes balloon/reset mortgage loans and excludes option ARMs.
	-4	See endnote (5) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
Table - Payment Defaults of Completed TDR Modifications, by Segment	'
	Table 5.5 — Payment Defaults of Completed TDR Modifications, by Segment(1)
		Three Months Ended September 30,														Nine Months Ended September 30,
		2014							2013							2014					2013
		Number of Loans			Post-TDR				Number of Loans			Post-TDR				Number of Loans		Post-TDR			Number of Loans		Post-TDR
					Recorded							Recorded						Recorded					Recorded
					Investment(2)							Investment(2)						Investment(2)					Investment(2)
		(dollars in millions)
	Single-family:
	20 and 30-year or more, amortizing fixed-rate(3)	5,190			$	922			3,943			$	726			13,814		$	2,483		10,726		$	1,989
	15-year amortizing fixed-rate	170			16				106			12				461		45			323		36
	Adjustable-rate	88			15				64			14				250		46			167		34
	Alt-A, interest-only, and option ARM(4)	604			138				590			155				1,778		428			1,652		437
	Total single-family	6,052			$	1,091			4,703			$	907			16,303		$	3,002		12,868		$	2,496
	Multifamily	—			$	—			—			$	—			—		$	—		—		$	—
	-1	Represents TDR loans that experienced a payment default during the period and had completed a modification during the year preceding the payment default. A payment default occurs when a borrower either: (a) became two or more months delinquent; or (b) completed a loss event, such as a short sale or foreclosure transfer. We only include payment defaults for a single loan once during each quarterly period within a year; however, a single loan will be reflected more than once if the borrower experienced another payment default in a subsequent quarterly period.
	-2	Represents the recorded investment at the end of the period in which the loan was modified and does not represent the recorded investment as of September 30.
	-3	See endnote (3) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”
	-4	See endnote (5) of “Table 4.2 — Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio.”

Real_Estate_Owned_Tables

Real Estate Owned (Tables)	9 Months Ended
	Sep. 30, 2014
Repossessed Assets [Abstract]	'
Table - REO	'
	Table 6.1 — REO
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
		(in millions)
	Beginning balance — REO	$	3,696		$	4,073		$	4,602		$	4,407
	Additions	815			1,832			3,293			4,820
	Dispositions	(1,475		)	(1,523		)	(4,859		)	(4,845		)
	Ending balance — REO	3,036			4,382			3,036			4,382
	Beginning balance, valuation allowance	(19		)	(22		)	(51		)	(29		)
	Change in valuation allowance	(106		)	8			(74		)	15
	Ending balance, valuation allowance	(125		)	(14		)	(125		)	(14		)
	Ending balance — REO, net	$	2,911		$	4,368		$	2,911		$	4,368

Investments_in_Securities_Tabl

Investments in Securities (Tables)	9 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Table - Available-For-Sale Securities	'
	Table 7.1 — Available-For-Sale Securities
								Gross Unrealized Losses
	30-Sep-14	Amortized			Gross			Other-Than-Temporary Impairment(1)			Temporary Impairment(2)			Fair
		Cost			Unrealized									Value
					Gains
		(in millions)
	Available-for-sale securities:
	Freddie Mac	$	40,070		$	1,376		$	—		$	(83	)	$	41,363
	Fannie Mae	9,845			686			—			(5		)	10,526
	Ginnie Mae	194			17			—			(1		)	210
	CMBS	22,735			982			(3		)	(100		)	23,614
	Subprime	22,543			1,038			(780		)	(100		)	22,701
	Option ARM	5,575			355			(219		)	(4		)	5,707
	Alt-A and other	4,897			649			(26		)	(7		)	5,513
	Obligations of states and political subdivisions	2,461			35			—			(3		)	2,493
	Manufactured housing	574			79			(2		)	(1		)	650
	Total available-for-sale securities	$	108,894		$	5,217		$	(1,030	)	$	(304	)	$	112,777
	31-Dec-13
	Available-for-sale securities:
	Freddie Mac	$	39,001		$	1,847		$	—		$	(189	)	$	40,659
	Fannie Mae	10,140			660			—			(3		)	10,797
	Ginnie Mae	149			18			—			—			167
	CMBS	29,151			1,524			(23		)	(314		)	30,338
	Subprime	29,897			382			(2,467		)	(313		)	27,499
	Option ARM	6,617			338			(376		)	(5		)	6,574
	Alt-A and other	8,322			526			(118		)	(24		)	8,706
	Obligations of states and political subdivisions	3,533			23			(7		)	(54		)	3,495
	Manufactured housing	629			61			(4		)	(2		)	684
	Total available-for-sale securities	$	127,439		$	5,379		$	(2,995	)	$	(904	)	$	128,919
	-1	Represents the gross unrealized losses for securities for which we have previously recognized other-than-temporary impairments in earnings.
	-2	Represents the gross unrealized losses for securities for which we have not previously recognized other-than-temporary impairments in earnings.
Table - Available-For-Sale Securities in a Gross Unrealized Loss Position	'
	Table 7.2 — Available-For-Sale Securities in a Gross Unrealized Loss Position
		Less than 12 Months						12 Months or Greater
	30-Sep-14	Fair			Gross Unrealized Losses			Fair			Gross Unrealized Losses
		Value						Value
		(in millions)
	Available-for-sale securities:
	Freddie Mac	$	5,838		$	(36	)	$	1,163		$	(47	)
	Fannie Mae	467			(3		)	48			(2		)
	Ginnie Mae	69			(1		)	—			—
	CMBS	582			(12		)	1,643			(91		)
	Subprime	606			(9		)	8,852			(871		)
	Option ARM	513			(4		)	1,790			(219		)
	Alt-A and other	204			(4		)	562			(29		)
	Obligations of states and political subdivisions	5			—			188			(3		)
	Manufactured housing	18			—			32			(3		)
	Total available-for-sale securities in a gross unrealized loss position	$	8,302		$	(69	)	$	14,278		$	(1,265	)
	31-Dec-13
	Available-for-sale securities:
	Freddie Mac	$	7,957		$	(144	)	$	649		$	(45	)
	Fannie Mae	248			(2		)	19			(1		)
	CMBS	1,147			(85		)	1,992			(252		)
	Subprime	472			(19		)	19,103			(2,761		)
	Option ARM	77			(2		)	2,608			(379		)
	Alt-A and other	262			(5		)	1,854			(137		)
	Obligations of states and political subdivisions	1,885			(56		)	24			(5		)
	Manufactured housing	—			—			65			(6		)
	Total available-for-sale securities in a gross unrealized loss position	$	12,048		$	(313	)	$	26,314		$	(3,586	)
Table - Significant Modeled Attributes for Certain Available-For-Sale Non-Agency Mortgage-Related Securities	'
	Table 7.3 — Significant Modeled Attributes for Certain Available-For-Sale Non-Agency Mortgage-Related Securities
		30-Sep-14
								Alt-A(1)
		Subprime			Option ARM			Fixed Rate			Variable Rate			Hybrid Rate
		(dollars in millions)
	Issuance Date
	2004 and prior:
	UPB	$	563		$	40		$	363		$	266		$	195
	Weighted average collateral defaults(2)	34		%	21		%	13		%	30		%	17		%
	Weighted average collateral severities(3)	57		%	45		%	46		%	43		%	39		%
	Weighted average voluntary prepayment rates(4)	7		%	9		%	12		%	8		%	9		%
	Average credit enhancements(5)	30		%	—		%	14		%	11		%	13		%
	2005:00:00
	UPB	$	2,839		$	1,786		$	535		$	386		$	1,283
	Weighted average collateral defaults(2)	44		%	29		%	18		%	39		%	24		%
	Weighted average collateral severities(3)	59		%	48		%	45		%	51		%	41		%
	Weighted average voluntary prepayment rates(4)	4		%	8		%	11		%	7		%	10		%
	Average credit enhancements(5)	48		%	1		%	(1		)%	17		%	2		%
	2006:00:00
	UPB	$	12,785		$	4,158		$	308		$	432		$	431
	Weighted average collateral defaults(2)	50		%	38		%	26		%	42		%	33		%
	Weighted average collateral severities(3)	59		%	49		%	45		%	49		%	41		%
	Weighted average voluntary prepayment rates(4)	3		%	7		%	9		%	7		%	9		%
	Average credit enhancements(5)	7		%	(3		)%	(2		)%	1		%	(4		)%
	2007:00:00
	UPB	$	14,519		$	2,509		$	121		$	467		$	208
	Weighted average collateral defaults(2)	50		%	37		%	41		%	41		%	37		%
	Weighted average collateral severities(3)	59		%	48		%	52		%	50		%	46		%
	Weighted average voluntary prepayment rates(4)	2		%	7		%	7		%	7		%	8		%
	Average credit enhancements(5)	3		%	3		%	(1		)%	(18		)%	—		%
	Total:
	UPB	$	30,706		$	8,493		$	1,327		$	1,551		$	2,117
	Weighted average collateral defaults(2)	49		%	36		%	21		%	39		%	26		%
	Weighted average collateral severities(3)	59		%	48		%	46		%	49		%	41		%
	Weighted average voluntary prepayment rates(4)	3		%	7		%	10		%	7		%	10		%
	Average credit enhancements(5)	9		%	—		%	3		%	1		%	2		%
	-1	Excludes non-agency mortgage-related securities backed by other loans, which primarily consist of securities backed by home equity lines of credit.
	-2	The expected cumulative default rate is expressed as a percentage of the current collateral UPB.
	-3	The expected average loss given default is calculated as the ratio of cumulative loss over cumulative default for each security.
	-4	The security’s voluntary prepayment rate represents the average of the monthly voluntary prepayment rate weighted by the security’s outstanding UPB.
	-5	Positive values reflect the amount of subordination and other financial support (excluding credit enhancement provided by bond insurance) that will incur losses in the securitization structure before any losses are allocated to securities that we own. Percentage generally calculated based on: (a) the total UPB of securities subordinate to the securities we own; divided by (b) the total UPB of all of the securities issued by the trust (excluding notional balances). Negative values are shown when unallocated collateral losses will be allocated to the securities that we own in excess of current remaining credit enhancement, if any. The unallocated collateral losses have been considered in our assessment of other-than-temporary impairment.
Table - Net Impairment of Available-For-Sale Securities Recognized in Earnings	'
	Table 7.4 — Net Impairment of Available-For-Sale Securities Recognized in Earnings
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
		(in millions)
	Available-for-sale securities:(1)
	CMBS	$	—		$	(3	)	$	—		$	(13	)
	Subprime	(125		)	(45		)	(582		)	(91		)
	Option ARM	(39		)	(12		)	(72		)	(17		)
	Alt-A and other	(2		)	(66		)	(33		)	(91		)
	Manufactured housing	—			—			—			(1		)
	Total net impairment of available-for-sale securities recognized in earnings	$	(166	)	$	(126	)	$	(687	)	$	(213	)
	-1	Includes $132 million and $598 million during the three and nine months ended September 30, 2014, respectively, compared to $118 million and $134 million during the three and nine months ended September 30, 2013, respectively, as we had the intent to sell the related securities before recovery of their amortized cost basis.
Table - Other-Than-Temporary Impairments Related to Credit Losses on Available-For-Sale Securities	'
	Table 7.5 — Other-Than-Temporary Impairments Related to Credit Losses on Available-For-Sale Securities
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
		(in millions)
	Credit-related other-than-temporary impairments on available-for-sale securities recognized in earnings:
	Beginning balance — remaining credit losses on available-for-sale securities where other-than-temporary impairments were recognized in earnings	$	11,118		$	15,772		$	14,463		$	16,745
	Additions:
	Amounts related to credit losses for which an other-than-temporary impairment was not previously recognized	—			4			—			20
	Amounts related to credit losses for which an other-than-temporary impairment was previously recognized	34			4			89			59
	Reductions:
	Amounts related to securities which were sold, written off, or matured	(807		)	(261		)	(1,141		)	(1,066		)
	Amounts for which we intend to sell the security or it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis	(1,949		)	(182		)	(4,736		)	(291		)
	Amounts related to amortization resulting from significant increases in cash flows expected to be collected and/or due to the passage of time that are recognized over the remaining life of the security	(110		)	(137		)	(389		)	(267		)
	Ending balance — remaining credit losses on available-for-sale securities where other-than-temporary impairments were recognized in earnings(1)	$	8,286		$	15,200		$	8,286		$	15,200
	-1	Excludes other-than-temporary impairments on securities that we intend to sell or it is more likely than not that we will be required to sell before recovery of the unrealized losses.
Table - Gross Realized Gains and Gross Realized Losses on Sales of Available-For-Sale Securities	'
	Table 7.6 — Gross Realized Gains and Gross Realized Losses on Sales of Available-For-Sale Securities
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
		(in millions)
	Gross realized gains
	Mortgage-related securities:
	Freddie Mac	$	81		$	172		$	745		$	248
	Fannie Mae	11			1			52			17
	CMBS	11			685			151			892
	Alt-A and other	38			10			242			56
	Obligations of states and political subdivisions	—			1			1			13
	Subprime	74			—			141			—
	Option ARM	58			—			62			—
	Total mortgage-related securities gross realized gains	273			869			1,394			1,226
	Gross realized gains	273			869			1,394			1,226
	Gross realized losses
	Mortgage related securities:(1)
	Freddie Mac	(9		)	(19		)	(11		)	(19		)
	Option ARM	(24		)	(4		)	(24		)	(4		)
	Alt-A and other	(5		)	(18		)	(6		)	(18		)
	Subprime	(128		)	(1		)	(141		)	(3		)
	Total mortgage-related securities gross realized losses	(166		)	(42		)	(182		)	(44		)
	Gross realized losses	(166		)	(42		)	(182		)	(44		)
	Net realized gains (losses)	$	107		$	827		$	1,212		$	1,182
	-1	The individual sales do not change our conclusion, at period end, that we do not intend to sell our remaining mortgage-related available-for-sale securities that are in an unrealized loss position and it is not more likely than not that we will be required to sell these securities before a sufficient time to recover all unrealized losses.
Table - Maturities of Available-For-Sale Securities	'
	Table 7.7 — Maturities of Available-For-Sale Securities(1)
		As of September 30, 2014
														After One Year Through Five Years					After Five Years Through Ten Years
		Total Amortized Cost			Total Fair Value			One Year or Less															After Ten Years
								Amortized Cost			Fair Value			Amortized Cost			Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
		(in millions)
	Available-for-sale securities:
	Freddie Mac	$	40,070		$	41,363		$	—		$	—		$	428		$	443	$	585	$	619	$	39,057	$	40,301
	Fannie Mae	9,845			10,526			1			1			73			77		117		129		9,654		10,319
	Ginnie Mae	194			210			—			—			5			5		23		27		166		178
	CMBS	22,735			23,614			—			—			316			332		8		8		22,411		23,274
	Subprime	22,543			22,701			—			—			—			—		—		—		22,543		22,701
	Option ARM	5,575			5,707			—			—			—			—		—		—		5,575		5,707
	Alt-A and other	4,897			5,513			2			2			46			47		3		3		4,846		5,461
	Obligations of states and political subdivisions	2,461			2,493			—			—			40			42		60		60		2,361		2,391
	Manufactured housing	574			650			—			—			—			—		9		12		565		638
	Total available-for-sale securities	$	108,894		$	112,777		$	3		$	3		$	908		$	946	$	805	$	858	$	107,178	$	110,970
	-1	Maturity information provided is based on contractual maturities, which may not represent the expected life as obligations underlying these securities may be prepaid at any time without penalty.
Table - Trading Securities	'
	Table 7.8 — Trading Securities
		30-Sep-14			31-Dec-13
		(in millions)
	Mortgage-related securities:
	Freddie Mac	$	14,900		$	9,349
	Fannie Mae	6,238			7,180
	Ginnie Mae	17			98
	Other	120			141
	Total mortgage-related securities	21,275			16,768
	U.S. Treasury securities	9,159			6,636
	Total fair value of trading securities	$	30,434		$	23,404

Debt_Securities_and_Subordinat1

Debt Securities and Subordinated Borrowings (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Table - Other Debt	'
	Table 8.1 — Other Debt
		30-Sep-14											31-Dec-13
		Par Value				Balance,  Net(1)				Weighted			Par Value			Balance,  Net(1)		Weighted
										Average								Average
										Effective Rate(2)								Effective Rate(2)
		(dollars in millions)
	Other short-term debt:
	Reference Bills® securities and discount notes	$	111,857			$	111,817			0.12	%		$	137,767		$	137,712	0.13	%
	Medium-term notes	—				—				—			4,000			4,000		0.16
	Total other short-term debt	$	111,857			$	111,817			0.12			$	141,767		$	141,712	0.13
	Other long-term debt:
	Original maturities on or before December 31,
	2014	$	19,239			$	19,226			1.41	%		$	78,115		$	78,041	1.91	%
	2015	58,778				58,764				1.62			70,303			70,284		1.44
	2016	66,933				67,142				2.03			63,564			63,669		2.19
	2017	72,122				72,118				1.82			51,908			51,885		2.14
	2018	31,692				31,652				1.7			33,418			33,372		1.74
	Thereafter	78,913				74,987				2.83			72,270			67,804		2.93
	Total other long-term debt(3)	327,677				323,889				2.02			369,578			365,055		2.08
	Total other debt	$	439,534			$	435,706						$	511,345		$	506,767
	-1	Represents par value, net of associated discounts or premiums, and hedge-related basis adjustments. Includes $5.0 billion and $2.7 billion at September 30, 2014 and December 31, 2013, respectively, of other long-term debt that represents the fair value of debt securities with the fair value option elected.
	-2	Represents the weighted average effective rate that remains constant over the life of the instrument, which includes the amortization of discounts or premiums, issuance costs, and hedge-related basis adjustments.
	-3	Balance, net for other long-term debt includes callable debt of $106.2 billion and $107.5 billion at September 30, 2014 and December 31, 2013, respectively, which gives us the option to call or not call debt for a variety of reasons that include managing the composition of liabilities or economic reasons.
Table - Debt Securities of Consolidated Trusts Held by Third Parties	'
	Table 8.2 — Debt Securities of Consolidated Trusts Held by Third Parties
		30-Sep-14													31-Dec-13
		Contractual		UPB				Balance,				Weighted			Contractual	UPB		Balance,		Weighted
		Maturity(1)						Net(2)				Average			Maturity(1)			Net(2)		Average
												Coupon(1)								Coupon(1)
		(dollars in millions)													(dollars in millions)
	Single-family:(3)
	30-year or more, fixed-rate	2014 - 2053		$	1,004,733			$	1,032,252			4.07	%		2014 - 2052	$	969,270	$	993,683	4.14	%
	20-year fixed-rate	2014 - 2034		72,710				74,974				3.77			2014 - 2034	75,910		78,252		3.81
	15-year fixed-rate	2014 - 2029		268,564				275,018				3.15			2014 - 2029	270,513		277,018		3.23
	Adjustable-rate	2014 - 2047		64,058				65,421				2.63			2014 - 2047	60,683		61,830		2.64
	Interest-only(4)	2026 - 2041		18,243				18,290				3.36			2026 - 2041	21,352		21,390		3.7
	FHA/VA	2015 - 2044		1,281				1,307				5.44			2014 - 2041	1,284		1,303		5.67
	Total single-family			1,429,589				1,467,262								1,399,012		1,433,476
	Multifamily(5)	2017 - 2019		525				583				4.77			2018 - 2019	444		508		4.96
	Total debt securities of consolidated trusts held by third parties(6)			$	1,430,114			$	1,467,845							$	1,399,456	$	1,433,984
	-1	Based on the contractual maturity and interest rate of debt securities of our consolidated trusts held by third parties.
	-2	Represents par value, net of associated discounts, premiums, and other basis adjustments.
	-3	Debt securities of consolidated trusts held by third parties are prepayable as the loans that collateralize the debt may prepay without penalty at any time.
	-4	Includes interest-only securities and interest-only mortgage loans that allow the borrowers to pay only interest for a fixed period of time before the loans begin to amortize.
	-5	Balance, Net includes interest-only securities recorded at fair value.
	-6	The effective rate for debt securities of consolidated trusts held by third parties was 3.21% and 3.39% as of September 30, 2014 and December 31, 2013, respectively.

Derivatives_Tables

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Table - Derivative Assets and Liabilities at Fair Value	'
	Table 9.1 — Derivative Assets and Liabilities at Fair Value
		30-Sep-14									31-Dec-13
		Notional or			Derivatives at Fair Value						Notional or			Derivatives at Fair Value
		Contractual									Contractual
		Amount			Assets			Liabilities			Amount			Assets			Liabilities
		(in millions)
	Total derivative portfolio
	Derivatives not designated as hedging instruments under the accounting guidance for derivatives and hedging
	Interest-rate swaps:
	Receive-fixed	$	219,773		$	4,145		$	(823	)	$	281,727		$	4,475		$	(2,438	)
	Pay-fixed	215,723			1,763			(9,436		)	242,597			5,540			(10,879		)
	Basis (floating to floating)	300			2			—			300			4			—
	Total interest-rate swaps	435,796			5,910			(10,259		)	524,624			10,019			(13,317		)
	Option-based:
	Call swaptions
	Purchased	53,800			2,012			—			59,290			2,373			—
	Written	5,855			—			(57		)	5,945			—			(201		)
	Put Swaptions
	Purchased	26,475			351			—			33,410			698			—
	Written	1,345			—			(2		)	—			—			—
	Other option-based derivatives(1)	13,915			692			—			23,365			1,041			(3		)
	Total option-based	101,390			3,055			(59		)	122,010			4,112			(204		)
	Futures	40,000			—			—			50,270			—			—
	Foreign-currency swaps	—			—			—			528			39			—
	Commitments	47,070			88			(66		)	18,731			61			(69		)
	Credit derivatives	5,307			14			(19		)	5,386			—			(6		)
	Swap guarantee derivatives	3,305			—			(28		)	3,477			—			(31		)
	Total derivatives not designated as hedging instruments	632,868			9,067			(10,431		)	725,026			14,231			(13,627		)
	Derivative interest receivable (payable)				803			(1,513		)				1,243			(1,835		)
	Netting adjustments(2)				(8,973		)	10,014						(14,411		)	15,282
	Total derivative portfolio, net	$	632,868		$	897		$	(1,930	)	$	725,026		$	1,063		$	(180	)
	-1	Primarily includes purchased interest-rate caps and floors.
	-2	Represents counterparty netting and cash collateral netting. Net cash collateral posted was $1.0 billion and $871 million at September 30, 2014 and December 31, 2013, respectively.
Table - Gains and Losses on Derivatives	'
	Table 9.2 — Gains and Losses on Derivatives
	Derivatives not designated as hedging	Derivative Gains (Losses)(1)
	instruments under the accounting	Three Months Ended September 30,						Nine Months Ended September 30,
	guidance for derivatives and hedging	2014			2013			2014			2013
		(in millions)
	Interest-rate swaps:
	Receive-fixed
	Foreign-currency denominated	$	—		$	(5	)	$	(1	)	$	(16	)
	U.S. dollar denominated	(751		)	(68		)	2,301			(8,326		)
	Total receive-fixed swaps	(751		)	(73		)	2,300			(8,342		)
	Pay-fixed	568			1,184			(5,804		)	14,752
	Basis (floating to floating)	(1		)	1			(1		)	(2		)
	Total interest-rate swaps	(184		)	1,112			(3,505		)	6,408
	Option based:
	Call swaptions
	Purchased	99			(94		)	1,172			(1,954		)
	Written	7			42			(145		)	424
	Put swaptions
	Purchased	(41		)	(157		)	(817		)	(29		)
	Other option-based derivatives(2)	13			(29		)	134			(338		)
	Total option-based	78			(238		)	344			(1,897		)
	Futures	(3		)	(2		)	(43		)	54
	Foreign-currency swaps	—			20			(7		)	20
	Commitments	100			(59		)	296			(180		)
	Credit derivatives	19			—			(9		)	—
	Swap guarantee derivatives	1			2			6			7
	Other(3)	(1		)	(1		)	(2		)	(2		)
	Subtotal	10			834			(2,920		)	4,410
	Accrual of periodic settlements:(4)
	Receive-fixed interest-rate swaps	726			1,005			2,343			2,831
	Pay-fixed interest-rate swaps	(1,354		)	(1,913		)	(4,319		)	(5,579		)
	Other	1			—			2			1
	Total accrual of periodic settlements	(627		)	(908		)	(1,974		)	(2,747		)
	Total	$	(617	)	$	(74	)	$	(4,894	)	$	1,663
	-1	Gains (losses) are reported as derivative gains (losses) on our consolidated statements of comprehensive income.
	-2	Primarily includes purchased interest-rate caps and floors.
	-3	Includes fees and commissions paid on cleared and exchange-traded derivatives.
	-4	The accrual of periodic cash settlements is recorded in derivative gains (losses) on our consolidated statements of comprehensive income.

Collateral_and_Offsetting_of_A1

Collateral and Offsetting of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2014
Offsetting [Abstract]	'
Table - Offsetting of Financial Assets and Liabilities	'
	Table 10.1 — Offsetting of Financial Assets and Liabilities
		30-Sep-14
		Gross			Amount Offset			Net Amount			Gross Amount			Net
		Amount			in the Consolidated			Presented in			Not Offset in			Amount
		Recognized(1)			Balance Sheets			the Consolidated			the Consolidated
								Balance Sheets(2)			Balance Sheets(3)
		(in millions)
	Assets:
	Derivatives:
	Over-the-counter interest-rate swaps and option-based derivatives	$	9,312		$	(8,819	)	$	493		$	(427	)	$	66
	Cleared and exchange-traded derivatives	456			(154		)	302			—			302
	Other(4)	102			—			102			—			102
	Total derivatives	9,870			(8,973		)	897			(427		)	470
	Securities purchased under agreements to resell	29,956			—			29,956			(29,956		)	—
	Total	$	39,826		$	(8,973	)	$	30,853		$	(30,383	)	$	470
	Liabilities:
	Derivatives:
	Over-the-counter interest-rate swaps and option-based derivatives	$	(9,930	)	$	8,113		$	(1,817	)	$	1,782		$	(35	)
	Cleared and exchange-traded derivatives	(1,901		)	1,901			—			—			—
	Other(4)	(113		)	—			(113		)	—			(113		)
	Total	$	(11,944	)	$	10,014		$	(1,930	)	$	1,782		$	(148	)
		December 31, 2013
		Gross			Amount Offset in			Net Amount			Gross Amount			Net
		Amount			the Consolidated			Presented in the			Not Offset in the			Amount
		Recognized(1)			Balance Sheets			Consolidated			Consolidated
								Balance Sheets(2)			Balance Sheets(3)
		(in millions)
	Assets:
	Derivatives:
	Over-the-counter interest-rate and foreign-currency swaps, and option-based derivatives	$	13,886		$	(13,266	)	$	620		$	(432	)	$	188
	Cleared and exchange-traded derivatives	1,527			(1,145		)	382			—			382
	Other(4)	61			—			61			—			61
	Total derivatives	15,474			(14,411		)	1,063			(432		)	631
	Securities purchased under agreements to resell	62,383			—			62,383			(62,383		)	—
	Total	$	77,857		$	(14,411	)	$	63,446		$	(62,815	)	$	631
	Liabilities:
	Derivatives:
	Over-the-counter interest-rate and foreign-currency swaps, and option-based derivatives	$	(14,616	)	$	14,545		$	(71	)	$	—		$	(71	)
	Cleared and exchange-traded derivatives	(737		)	737			—			—			—
	Other(4)	(109		)	—			(109		)	—			(109		)
	Total	$	(15,462	)	$	15,282		$	(180	)	$	—		$	(180	)
	-1	For derivatives, includes interest receivable or payable and trade/settle receivable or payable.
	-2	For derivatives, includes cash collateral posted or held in excess of exposure.
	-3	Does not include the fair value amount of non-cash collateral posted or held that exceeds the associated net asset or liability presented on the consolidated balance sheets. For cleared and exchange-traded derivatives, does not include non-cash collateral posted by us with an aggregate fair value of $1.7 billion and $0.6 billion as of September 30, 2014 and December 31, 2013, respectively.
	-4	Includes commitments, swap guarantee derivatives, certain written options and credit derivatives.
Table - Collateral in the Form of Securities Pledged	'
	Table 10.2 — Collateral in the Form of Securities Pledged
		30-Sep-14			31-Dec-13
		(in millions)
	Securities pledged with the ability for the secured party to repledge:
	Debt securities of consolidated trusts held by third parties(1)	$	2,152		$	10,654
	Available-for-sale securities	—			70
	Trading securities	1,393			365
	Total securities pledged	$	3,545		$	11,089
	-1	Represents PCs held by us in our Investments segment mortgage investments portfolio and pledged as collateral which are recorded as a reduction to debt securities of consolidated trusts held by third parties on our consolidated balance sheets.

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2014
Stockholders' Equity Note [Abstract]	'
Table - Changes in AOCI by Component, Net of Tax	'
	Table 11.1 — Changes in AOCI by Component, Net of Tax
		Nine Months Ended September 30, 2014
		AOCI Related				AOCI Related				AOCI Related				Total
		to Available-				to Cash Flow				to Defined
		For-Sale				Hedge				Benefit Plans
		Securities(1)				Relationships(2)
		(in millions)
	Beginning balance	$	962			$	(1,000	)		$	32			$	(6	)
	Other comprehensive income before reclassifications(3)	1,903				—				1				1,904
	Amounts reclassified from accumulated other comprehensive income	(341		)		151				(2		)		(192		)
	Changes in AOCI by component	1,562				151				(1		)		1,712
	Ending balance	$	2,524			$	(849	)		$	31			$	1,706
		Nine Months Ended September 30, 2013
		AOCI Related				AOCI Related				AOCI Related				Total
		to Available-				to Cash Flow				to Defined
		For-Sale				Hedge				Benefit Plans
		Securities(1)				Relationships(2)
		(in millions)
	Beginning balance	$	(1,444	)		$	(1,316	)		$	(178	)		$	(2,938	)
	Other comprehensive income before reclassifications(3)	2,066				—				18				2,084
	Amounts reclassified from accumulated other comprehensive income	(630		)		250				6				(374		)
	Changes in AOCI by component	1,436				250				24				1,710
	Ending balance	$	(8	)		$	(1,066	)		$	(154	)		$	(1,228	)
	-1	The amounts reclassified from AOCI represent the gain or loss recognized in earnings due to a sale of an available-for-sale security or the recognition of a net impairment recognized in earnings. See “NOTE 7: INVESTMENTS IN SECURITIES” for more information.
	-2	The amounts reclassified from AOCI represent the AOCI amount that was recognized in earnings as the originally hedged forecasted transactions affected earnings, unless it was deemed probable that the forecasted transaction would not occur. If it is probable that the forecasted transaction will not occur, then the deferred gain or loss associated with the hedge related to the forecasted transaction would be reclassified into earnings immediately. See “NOTE 9: DERIVATIVES” for more information about our derivatives.
	-3	For the nine months ended September 30, 2014 and 2013, net of tax expense of $1.0 billion and $1.1 billion, respectively, for AOCI related to available-for-sale securities.
Table - Reclassifications from AOCI to Net Income	'
	Table 11.2 — Reclassifications from AOCI to Net Income
	Details about Accumulated Other		Three Months Ended September 30,								Nine Months Ended September 30,							Affected Line Item in the Consolidated
	Comprehensive Income Components																	Statements of Comprehensive Income
			2014				2013				2014				2013
			(in millions)
	AOCI related to available-for-sale  securities
			$	107			$	827			$	1,212			$	1,182		Other gains (losses) on investment securities recognized in earnings
			(166		)		(126		)		(687		)		(213		)	Net impairment of available-for-sale securities recognized in earnings
			(59		)		701				525				969			Total before tax
			21				(246		)		(184		)		(339		)	Tax (expense) or benefit
			(38		)		455				341				630			Net of tax
	AOCI related to cash flow hedge relationships
			(1		)		(3		)		(2		)		(5		)	Interest expense — Other debt
			(75		)		(107		)		(230		)		(360		)	Expense related to derivatives
			(76		)		(110		)		(232		)		(365		)	Total before tax
			26				34				81				115			Tax (expense) or benefit
			(50		)		(76		)		(151		)		(250		)	Net of tax
	AOCI related to defined benefit plans
			1				(2		)		3				(6		)	Salaries and employee benefits
			—				—				(1		)		—			Tax (expense) or benefit
			1				(2		)		2				(6		)	Net of tax
	Total reclassifications in the period		$	(87	)		$	377			$	192			$	374		Net of tax

Segment_Reporting_Tables

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Table - Summary of Segment Earnings and Comprehensive Income (Loss)	'
	Table 13.1 — Summary of Segment Earnings and Comprehensive Income (Loss)
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
		(in millions)
	Segment Earnings (loss), net of taxes:
	Single-family Guarantee	$	196		$	2,019		$	1,077		$	4,546
	Investments	1,440			3,902			5,060			9,051
	Multifamily	445			639			1,339			2,560
	All Other	—			23,926			(13		)	23,898
	Total Segment Earnings, net of taxes	2,081			30,486			7,463			40,055
	Net income	$	2,081		$	30,486		$	7,463		$	40,055
	Comprehensive income (loss) of segments:
	Single-family Guarantee	$	195		$	2,021		$	1,076		$	4,560
	Investments	2,259			4,335			6,953			12,016
	Multifamily	332			155			1,159			1,291
	All Other	—			23,926			(13		)	23,898
	Comprehensive income of segments	2,786			30,437			9,175			41,765
	Comprehensive income	$	2,786		$	30,437		$	9,175		$	41,765
Table - Segment Earnings and Reconciliation to GAAP Results	'
	Table 13.2 — Segment Earnings and Reconciliation to GAAP Results
		Three Months Ended September 30, 2014
														Total Segment			Reconciliation to Consolidated Statements of									Total per
														Earnings (Loss),			Comprehensive Income									Consolidated
														Net of Tax												Statements of
																										Comprehensive
		Single-family			Investments			Multifamily			All						Reclassifications(1)			Segment			Total			Income
		Guarantee									Other									Adjustments(2)			Reconciling
																							Items
		(in millions)
	Net interest income	$	19		$	762		$	240		$	—		$	1,021		$	2,474		$	168		$	2,642		$	3,663
	(Provision) benefit for credit losses	(818		)	—			10			—			(808		)	234			—			234			(574		)
	Non-interest income (loss):
	Management and guarantee income(3)	1,341			—			65			—			1,406			(1,247		)	(75		)	(1,322		)	84
	Net impairment of available-for-sale securities recognized in earnings	—			37			—			—			37			(203		)	—			(203		)	(166		)
	Derivative gains (losses)	19			(133		)	310			—			196			(813		)	—			(813		)	(617		)
	Gains (losses) on trading securities	—			(202		)	(14		)	—			(216		)	—			—			—			(216		)
	Gains (losses) on mortgage loans	52			—			116			—			168			—			—			—			168
	Other non-interest income (loss)	351			1,594			11			—			1,956			(445		)	—			(445		)	1,511
	Non-interest expense:
	Administrative expenses	(302		)	(104		)	(66		)	—			(472		)	—			—			—			(472		)
	REO operations income (expense)	(109		)	—			6			—			(103		)	—			—			—			(103		)
	Temporary Payroll Tax Cut Continuation Act of 2011 expense	(198		)	—			—			—			(198		)	—			—			—			(198		)
	Other non-interest expense	(40		)	—			(3		)	—			(43		)	—			—			—			(43		)
	Segment adjustments(2)	(75		)	168			—			—			93			—			(93		)	(93		)	—
	Income tax expense	(44		)	(682		)	(230		)	—			(956		)	—			—			—			(956		)
	Net income	196			1,440			445			—			2,081			—			—			—			2,081
	Changes in unrealized gains (losses) related to available-for-sale securities	—			769			(113		)	—			656			—			—			—			656
	Changes in unrealized gains (losses) related to cash flow hedge relationships	—			50			—			—			50			—			—			—			50
	Changes in defined benefit plans	(1		)	—			—			—			(1		)	—			—			—			(1		)
	Total other comprehensive income (loss), net of taxes	(1		)	819			(113		)	—			705			—			—			—			705
	Comprehensive income	$	195		$	2,259		$	332		$	—		$	2,786		$	—		$	—		$	—		$	2,786
		Nine Months Ended September 30, 2014
														Total Segment			Reconciliation to Consolidated Statements of									Total per
														Earnings (Loss),			Comprehensive Income									Consolidated
														Net of Tax												Statements of
																										Comprehensive
		Single-family			Investments			Multifamily			All						Reclassifications(1)			Segment			Total			Income
		Guarantee									Other									Adjustments(2)			Reconciling
																							Items
		(in millions)
	Net interest income	$	(27	)	$	2,324		$	705		$	—		$	3,002		$	7,206		$	468		$	7,674		$	10,676
	(Provision) benefit for credit losses	(742		)	—			52			—			(690		)	649			—			649			(41		)
	Non-interest income (loss):
	Management and guarantee income(3)	3,764			—			186			—			3,950			(3,473		)	(233		)	(3,706		)	244
	Net impairment of available-for-sale securities recognized in earnings	—			(95		)	—			—			(95		)	(592		)	—			(592		)	(687		)
	Derivative gains (losses)	(9		)	(2,745		)	507			—			(2,247		)	(2,647		)	—			(2,647		)	(4,894		)
	Gains (losses) on trading securities	—			(243		)	60			—			(183		)	—			—			—			(183		)
	Gains (losses) on mortgage loans	(143		)	—			526			—			383			—			—			—			383
	Other non-interest income	602			8,004			143			—			8,749			(1,143		)	—			(1,143		)	7,606
	Non-interest expense:
	Administrative expenses	(855		)	(339		)	(199		)	—			(1,393		)	—			—			—			(1,393		)
	REO operations income (expense)	(120		)	—			8			—			(112		)	—			—			—			(112		)
	Temporary Payroll Tax Cut Continuation Act of 2011 expense	(563		)	—			—			—			(563		)	—			—			—			(563		)
	Other non-interest expense	(159		)	(6		)	(16		)	(18		)	(199		)	—			—			—			(199		)
	Segment adjustments(2)	(233		)	468			—			—			235			—			(235		)	(235		)	—
	Income tax (expense) benefit	(438		)	(2,308		)	(633		)	5			(3,374		)	—			—			—			(3,374		)
	Net income (loss)	1,077			5,060			1,339			(13		)	7,463			—			—			—			7,463
	Changes in unrealized gains (losses) related to available-for-sale securities	—			1,742			(180		)	—			1,562			—			—			—			1,562
	Changes in unrealized gains (losses) related to cash flow hedge relationships	—			151			—			—			151			—			—			—			151
	Changes in defined benefit plans	(1		)	—			—			—			(1		)	—			—			—			(1		)
	Total other comprehensive income (loss), net of taxes	(1		)	1,893			(180		)	—			1,712			—			—			—			1,712
	Comprehensive income (loss)	$	1,076		$	6,953		$	1,159		$	(13	)	$	9,175		$	—		$	—		$	—		$	9,175
	Three Months Ended September 30, 2013
													Total Segment			Reconciliation to Consolidated Statements of									Total per
													Earnings (Loss),			Comprehensive Income									Consolidated
													Net of Tax												Statements of
																									Comprehensive
	Single-family			Investments			Multifamily			All						Reclassifications(1)			Segment			Total			Income
	Guarantee									Other									Adjustments(2)			Reconciling
																						Items
	(in millions)
Net interest income	$	203		$	883		$	321		$	—		$	1,407		$	2,600		$	269		$	2,869		$	4,276
Benefit for credit losses	885			—			28			—			913			225			—			225			1,138
Non-interest income (loss):
Management and guarantee income(3)	1,230			—			52			—			1,282			(1,058		)	(154		)	(1,212		)	70
Net impairment of available-for-sale securities recognized in earnings	—			16			(4		)	—			12			(138		)	—			(138		)	(126		)
Derivative gains (losses)	—			1,624			(615		)	—			1,009			(1,083		)	—			(1,083		)	(74		)
Gains (losses) on trading securities	—			(184		)	(23		)	—			(207		)	—			—			—			(207		)
Gains (losses) on mortgage loans	—			—			114			—			114			—			—			—			114
Other non-interest income	246			1,503			709			—			2,458			(546		)	—			(546		)	1,912
Non-interest expense:
Administrative expenses	(263		)	(133		)	(59		)	—			(455		)	—			—			—			(455		)
REO operations income (expense)	67			—			12			—			79			—			—			—			79
Temporary Payroll Tax Cut Continuation Act of 2011 expense	(150		)	—			—			—			(150		)	—			—			—			(150		)
Other non-interest expense	(45		)	—			(6		)	—			(51		)	—			—			—			(51		)
Segment adjustments(2)	(154		)	269			—			—			115			—			(115		)	(115		)	—
Income tax (expense) benefit	—			(76		)	110			23,926			23,960			—			—			—			23,960
Net income	2,019			3,902			639			23,926			30,486			—			—			—			30,486
Changes in unrealized gains (losses) related to available-for-sale securities	—			357			(484		)	—			(127		)	—			—			—			(127		)
Changes in unrealized gains (losses) related to cash flow hedge relationships	—			76			—			—			76			—			—			—			76
Changes in defined benefit plans	2			—			—			—			2			—			—			—			2
Total other comprehensive income (loss), net of taxes	2			433			(484		)	—			(49		)	—			—			—			(49		)
Comprehensive income	$	2,021		$	4,335		$	155		$	23,926		$	30,437		$	—		$	—		$	—		$	30,437
	Nine Months Ended September 30, 2013
													Total Segment			Reconciliation to Consolidated Statements of									Total per
													Earnings (Loss),			Comprehensive Income									Consolidated
													Net of Tax												Statements of
																									Comprehensive
	Single-family			Investments			Multifamily			All						Reclassifications(1)			Segment			Total			Income
	Guarantee									Other									Adjustments(2)			Reconciling
																						Items
	(in millions)
Net interest income	$	300		$	2,752		$	944		$	—		$	3,996		$	7,835		$	854		$	8,689		$	12,685
Benefit for credit losses	1,474			—			167			—			1,641			623			—			623			2,264
Non-interest income (loss):
Management and guarantee income(3)	3,771			—			147			—			3,918			(3,129		)	(596		)	(3,725		)	193
Net impairment of available-for-sale securities recognized in earnings	—			73			(15		)	—			58			(271		)	—			(271		)	(213		)
Derivative gains (losses)	—			3,235			1,550			—			4,785			(3,122		)	—			(3,122		)	1,663
Gains (losses) on trading securities	—			(1,213		)	(122		)	—			(1,335		)	—			—			—			(1,335		)
Gains (losses) on mortgage loans	—			—			(440		)	—			(440		)	—			—			—			(440		)
Other non-interest income	695			3,214			928			—			4,837			(1,936		)	—			(1,936		)	2,901
Non-interest expense:
Administrative expenses	(756		)	(377		)	(198		)	—			(1,331		)	—			—			—			(1,331		)
REO operations income (expense)	168			—			15			—			183			—			—			—			183
Temporary Payroll Tax Cut Continuation Act of 2011 expense	(366		)	—			—			—			(366		)	—			—			—			(366		)
Other non-interest expense	(139		)	(1		)	(18		)	(27		)	(185		)	—			—			—			(185		)
Segment adjustments(2)	(596		)	854			—			—			258			—			(258		)	(258		)	—
Income tax (expense) benefit	(5		)	514			(398		)	23,925			24,036			—			—			—			24,036
Net income (loss)	4,546			9,051			2,560			23,898			40,055			—			—			—			40,055
Changes in unrealized gains (losses) related to available-for-sale securities	—			2,707			(1,271		)	—			1,436			—			—			—			1,436
Changes in unrealized gains (losses) related to cash flow hedge relationships	—			250			—			—			250			—			—			—			250
Changes in defined benefit plans	14			8			2			—			24			—			—			—			24
Total other comprehensive income (loss), net of taxes	14			2,965			(1,269		)	—			1,710			—			—			—			1,710
Comprehensive income	$	4,560		$	12,016		$	1,291		$	23,898		$	41,765		$	—		$	—		$	—		$	41,765
-1	See “NOTE 13: SEGMENT REPORTING — Segment Earnings — Investment Activity-Related Reclassifications” and “— Credit Guarantee Activity-Related Reclassifications” in our 2013 Annual Report for information regarding these reclassifications.
-2	See “Segment Adjustments” for information regarding these adjustments.
-3	Management and guarantee income total per consolidated statements of comprehensive income is included in other income on our GAAP consolidated statements of comprehensive income.

Financial_Guarantees_Tables

Financial Guarantees (Tables)	9 Months Ended
	Sep. 30, 2014
Guarantees [Abstract]	'
Table - Financial Guarantees	'
	Table 14.1 — Financial Guarantees
		September 30, 2014					31-Dec-13
		Maximum		Recognized		Maximum	Maximum		Recognized		Maximum
		Exposure(1)		Liability(2)		Remaining	Exposure(1)		Liability(2)		Remaining
						Term					Term
		(dollars in millions, terms in years)
	Non-consolidated Freddie Mac securities(3)	$	81,117	$	806	39	$	71,809	$	731	40
	Other guarantee commitments	26,076		754		35	29,160		791		36
	Derivative instruments(4)	10,740		90		31	9,856		239		32
	-1	Maximum exposure represents the contractual amounts that could be lost under the non-consolidated guarantees if counterparties or borrowers defaulted, without consideration of possible recoveries under credit enhancement arrangements, such as recourse provisions, third-party insurance contracts, or from collateral held or pledged. The maximum exposure disclosed above is not representative of the actual loss we are likely to incur, based on our historical loss experience and after consideration of proceeds from related collateral liquidation. The maximum exposure for our liquidity guarantees is not mutually exclusive of our default guarantees on the same securities; therefore, these amounts are included within the maximum exposure of non-consolidated Freddie Mac securities and other guarantee commitments.
	-2	For non-consolidated Freddie Mac securities and other guarantee commitments, this amount represents the guarantee obligation on our consolidated balance sheets. This amount excludes our reserve for guarantee losses, which totaled $110 million and $111 million as of September 30, 2014 and December 31, 2013, respectively, and is included within other liabilities on our consolidated balance sheets.
	-3	In addition to our guarantee of principal and interest, we also provide liquidity guarantees for certain multifamily housing revenue bonds included in this category. However, no advances under these liquidity guarantees were outstanding at September 30, 2014 or December 31, 2013.
	-4	See “NOTE 9: DERIVATIVES” for information about these derivative guarantees.

Concentration_of_Credit_and_Ot1

Concentration of Credit and Other Risks (Tables)	9 Months Ended
	Sep. 30, 2014
Risks and Uncertainties [Abstract]	'
Table - Concentration of Credit Risk	'
	Table 15.1 — Concentration of Credit Risk — Single-Family Credit Guarantee Portfolio
		30-Sep-14					31-Dec-13						Percent of Credit Losses(1)(2 ) Nine Months Ended
		Percentage  of		Serious			Percentage  of			Serious			30-Sep-14		30-Sep-13
		Portfolio(2)(3)		Delinquency			Portfolio(2)(3)			Delinquency
				Rate						Rate
	Year of Origination
	2014	8	%	0.01	%		N/A			N/A			—	%	N/A
	2013	16		0.04			16	%		0.01	%		—		—	%
	2012	15		0.07			16			0.04			—		—
	2011	7		0.23			8			0.18			—		—
	2010	6		0.44			7			0.39			—		1
	2009	6		0.89			7			0.88			2		2
	Subtotal - New single-family book	58		0.23			54			0.24			2		3
	HARP and other relief refinance loans(4)	20		0.7			21			0.64			7		6
	2005 to 2008 Legacy single-family book	14		7.66			16			8.77			83		82
	Pre-2005 Legacy single-family book	8		3.12			9			3.24			8		9
	Total	100	%	1.96	%		100	%		2.39	%		100	%	100	%
	Region(5)
	West	29	%	1.31	%		28	%		1.73	%		13	%	27	%
	Northeast	26		2.87			26			3.23			26		13
	North Central	17		1.53			18			1.81			21		23
	Southeast	16		2.56			16			3.42			36		34
	Southwest	12		1.17			12			1.36			4		3
	Total	100	%	1.96	%		100	%		2.39	%		100	%	100	%
	State
	Arizona, California, Florida, and Nevada(6)	26	%	2.09	%		26	%		3.01	%		37	%	49	%
	Illinois, Michigan, and Ohio(7)	10		1.77			11			2.11			17		19
	New York and New Jersey(8)	9		4.69			9			5.11			10		3
	All other	55		1.57			54			1.85			36		29
	Total	100	%	1.96	%		100	%		2.39	%		100	%	100	%
	-1	Credit losses consist of the aggregate amount of charge-offs, net of recoveries, and REO operations expense in each of the respective periods and exclude foregone interest on TDRs and non-accrual loans and other market-based losses recognized on our consolidated statements of comprehensive income.
	-2	Within these columns, "—" represents less than 0.5%.
	-3	Based on the UPB of our single-family credit guarantee portfolio, which includes unsecuritized single-family mortgage loans held by us on our consolidated balance sheets and those underlying Freddie Mac mortgage-related securities, or covered by our other guarantee commitments.
	-4	HARP and other relief refinance loans are presented separately rather than in the year that the refinancing occurred (from 2009 to 2014). All other refinance loans are presented in the year that the refinancing occurred. Prior period information has been revised to conform with the current period presentation.
	-5	Region designation: West (AK, AZ, CA, GU, HI, ID, MT, NV, OR, UT, WA); Northeast (CT, DE, DC, MA, ME, MD, NH, NJ, NY, PA, RI, VT, VA, WV); North Central (IL, IN, IA, MI, MN, ND, OH, SD, WI); Southeast (AL, FL, GA, KY, MS, NC, PR, SC, TN, VI); Southwest (AR, CO, KS, LA, MO, NE, NM, OK, TX, WY).
	-6	Represents the four states that had the largest cumulative declines in home prices during the housing crisis that began in 2006, as measured using Freddie Mac’s home price index.
	-7	Represents selected states in the North Central region that have experienced adverse economic conditions since 2006.
	-8	Represents two states with a judicial foreclosure process in which there are a significant number of seriously delinquent loans within our single-family credit guarantee portfolio.
	Table 15.3 — Concentration of Credit Risk — Multifamily Mortgage Portfolio
		30-Sep-14						31-Dec-13
		UPB			Delinquency			UPB				Delinquency
					Rate(1)							Rate(1)
		(dollars in billions)
	State(2)
	California	$	22.9		—	%		$	22.4			0.03	%
	Texas	16.9			—			16.7				0.02
	New York	11.2			0.11			11.4				0.12
	Florida	9.4			0.05			9.3				0.28
	Virginia	6.9			—			7				0.37
	Maryland	6.8			—			6.7				—
	All other states	61.1			0.03			59.3				0.08
	Total	$	135.2		0.03	%		$	132.8			0.09	%
	Region(3)
	Northeast	$	37.4		0.03	%		$	37.5			0.1	%
	West	35			—			33.8				0.07
	Southwest	26.9			—			26.2				0.05
	Southeast	24.7			0.07			24.1				0.16
	North Central	11.2			0.07			11.2				0.07
	Total	$	135.2		0.03	%		$	132.8			0.09	%
	Other Categories(4)
	Original LTV ratio greater than 80%	$	5.7		0.04	%		$	5.6			0.19	%
	Original DSCR below 1.10	2.1			—			2.2				—
	-1	Based on the UPB of multifamily mortgages two monthly payments or more delinquent or in foreclosure.
-2	Represents the six states with the highest UPB at September 30, 2014.
-3	See endnote (5) to “Table 15.1 — Concentration of Credit Risk — Single-Family Credit Guarantee Portfolio” for a description of these regions.
-4	These categories are not mutually exclusive and a loan in one category may also be included within another category.
Certain Higher Risk Categories In The Single Family Credit Guarantee Portfolio [Table Text Block]	'
	Table 15.2 — Certain Higher-Risk Categories in the Single-Family Credit Guarantee Portfolio(1)
		Percentage of Portfolio(1)					Serious Delinquency Rate
		30-Sep-14		31-Dec-13			30-Sep-14			31-Dec-13
	Interest-only	2	%	2	%		9.89	%		12.51	%
	Option ARM(2)	—		—			10.39			12.3
	Alt-A	3		3			8.81			10.06
	Original LTV ratio greater than 90%(3)	16		16			2.64			3.22
	Lower FICO scores at origination (less than 620)	3		3			8.71			9.99
	-1	Based on UPB. Excludes loans underlying certain Other Guarantee Transactions for which data was not available. Within these columns, "—" represents less than 0.5%.
	-2	For reporting purposes, loans within the option ARM category continue to be reported in that category following modification, even though the modified loan no longer provides for optional payment provisions.
	-3	Includes HARP loans, which we are required to purchase as part of our participation in the MHA Program.

Fair_Value_Disclosures_Tables

Fair Value Disclosures (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Table - Assets and Liabilities on Our Consolidated Balance Sheets Measured at Fair Value on a Recurring Basis	'
	Table 16.1 — Assets and Liabilities on Our Consolidated Balance Sheets Measured at Fair Value on a Recurring Basis
		September 30, 2014
		Level 1			Level 2			Level 3			Netting				Total
											Adjustment(1)
		(in millions)
	Assets:
	Investments in securities:
	Available-for-sale, at fair value:
	Mortgage-related securities:
	Freddie Mac	$	—		$	37,057		$	4,306		$	—			$	41,363
	Fannie Mae	—			10,420			106			—				10,526
	Ginnie Mae	—			206			4			—				210
	CMBS	—			20,262			3,352			—				23,614
	Subprime	—			—			22,701			—				22,701
	Option ARM	—			—			5,707			—				5,707
	Alt-A and other	—			—			5,513			—				5,513
	Obligations of states and political subdivisions	—			—			2,493			—				2,493
	Manufactured housing	—			—			650			—				650
	Total available-for-sale securities, at fair value	—			67,945			44,832			—				112,777
	Trading, at fair value:
	Mortgage-related securities:
	Freddie Mac	—			14,005			895			—				14,900
	Fannie Mae	—			6,061			177			—				6,238
	Ginnie Mae	—			17			—			—				17
	Other	—			116			4			—				120
	Total mortgage-related securities	—			20,199			1,076			—				21,275
	U.S. Treasury securities	9,159			—			—			—				9,159
	Total trading securities, at fair value	9,159			20,199			1,076			—				30,434
	Total investments in securities	9,159			88,144			45,908			—				143,211
	Mortgage loans:
	Held-for-sale, at fair value	—			7,719			—			—				7,719
	Derivative assets, net:
	Interest-rate swaps	—			5,910			—			—				5,910
	Option-based derivatives	—			3,055			—			—				3,055
	Other	—			66			36			—				102
	Subtotal, before netting adjustments	—			9,031			36			—				9,067
	Netting adjustments(1)	—			—			—			(8,170		)		(8,170		)
	Total derivative assets, net	—			9,031			36			(8,170		)		897
	Other assets:
	Guarantee asset, at fair value	—			—			1,570			—				1,570
	All other, at fair value	—			—			8			—				8
	Total other assets	—			—			1,578			—				1,578
	Total assets carried at fair value on a recurring basis	$	9,159		$	104,894		$	47,522		$	(8,170	)		$	153,405
	Liabilities:
	Debt securities of consolidated trusts held by third parties, at fair value	$	—		$	45		$	—		$	—			$	45
	Other debt, at fair value	—			4,988			—			—				4,988
	Derivative liabilities, net:
	Interest-rate swaps	—			10,259			—			—				10,259
	Option-based derivatives	—			59			—			—				59
	Other	—			66			47			—				113
	Subtotal, before netting adjustments	—			10,384			47			—				10,431
	Netting adjustments(1)	—			—			—			(8,501		)		(8,501		)
	Total derivative liabilities, net	—			10,384			47			(8,501		)		1,930
	Total liabilities carried at fair value on a recurring basis	$	—		$	15,417		$	47		$	(8,501	)		$	6,963
		Fair Value at December 31, 2013
		Level 1			Level 2			Level 3			Netting				Total
											Adjustment(1)
		(in millions)
	Assets:
	Investments in securities:
	Available-for-sale, at fair value:
	Mortgage-related securities:
	Freddie Mac	$	—		$	38,720		$	1,939		$	—			$	40,659
Fannie Mae	—			10,666			131			—				10,797
Ginnie Mae	—			155			12			—				167
CMBS	—			27,229			3,109			—				30,338
Subprime	—			—			27,499			—				27,499
Option ARM	—			—			6,574			—				6,574
Alt-A and other	—			—			8,706			—				8,706
Obligations of states and political subdivisions	—			—			3,495			—				3,495
Manufactured housing	—			—			684			—				684
Total available-for-sale securities, at fair value	—			76,770			52,149			—				128,919
Trading, at fair value:
Mortgage-related securities:
Freddie Mac	—			9,006			343			—				9,349
Fannie Mae	—			6,959			221			—				7,180
Ginnie Mae	—			24			74			—				98
Other	—			133			8			—				141
Total mortgage-related securities	—			16,122			646			—				16,768
U.S. Treasury securities	6,636			—			—			—				6,636
Total trading securities, at fair value	6,636			16,122			646			—				23,404
Total investments in securities	6,636			92,892			52,795			—				152,323
Mortgage loans:
Held-for-sale, at fair value	—			8,727			—			—				8,727
Derivative assets, net:
Interest-rate swaps	—			10,009			10			—				10,019
Option-based derivatives	—			4,112			—			—				4,112
Other	—			99			1			—				100
Subtotal, before netting adjustments	—			14,220			11			—				14,231
Netting adjustments(1)	—			—			—			(13,168		)		(13,168		)
Total derivative assets, net	—			14,220			11			(13,168		)		1,063
Other assets:
Guarantee asset, at fair value	—			—			1,611			—				1,611
All other, at fair value	—			—			9			—				9
Total other assets	—			—			1,620			—				1,620
Total assets carried at fair value on a recurring basis	$	6,636		$	115,839		$	54,426		$	(13,168	)		$	163,733
Liabilities:
Debt securities of consolidated trusts held by third parties, at fair value	$	—		$	59		$	—		$	—			$	59
Other debt, at fair value	—			1,155			1,528			—				2,683
Derivative liabilities, net:
Interest-rate swaps	—			13,022			295			—				13,317
Option-based derivatives	—			201			3			—				204
Other	—			68			38			—				106
Subtotal, before netting adjustments	—			13,291			336			—				13,627
Netting adjustments(1)	—			—			—			(13,447		)		(13,447		)
Total derivative liabilities, net	—			13,291			336			(13,447		)		180
Total liabilities carried at fair value on a recurring basis	$	—		$	14,505		$	1,864		$	(13,447	)		$	2,922
-1	Represents counterparty netting, cash collateral netting and net derivative interest receivable or payable. The net cash collateral posted was $1.0 billion and $871 million, respectively, at September 30, 2014 and December 31, 2013. The net interest receivable (payable) of derivative assets and derivative liabilities was $(0.7) billion and $(0.6) billion at September 30, 2014 and December 31, 2013, respectively, which was mainly related to interest rate swaps.
Table - Assets and Liabilities on Our Consolidated Balance Sheets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs	'
	Table 16.2 — Assets and Liabilities on Our Consolidated Balance Sheets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs
		Three Months Ended September 30, 2014
					Realized and unrealized gains (losses)
		Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
		June 30,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		gains (losses)
		2014						comprehensive																		Level 3(5)		Level 3(5)			2014		still held(6)
								income(1)
		(in millions)
	Assets
	Investments in securities:
	Available-for-sale, at fair value:
	Mortgage-related securities:
	Freddie Mac	$	2,892		$	3		$	1		$	4			$	4,364		$	—	$	(2,077	)	$	(34	)	$	—	$	(843	)	$	4,306	$	—
	Fannie Mae	136			—			(1		)	(1		)		—			—		—			(4		)	45		(70		)	106		—
	Ginnie Mae	5			—			—			—				—			—		—			(1		)	—		—			4		—
	CMBS	3,326			—			41			41				—			—		—			(15		)	—		—			3,352		—
	Subprime	24,291			(53		)	1,068			1,015				—			—		(2,423		)	(182		)	—		—			22,701		(125		)
	Option ARM	6,231			(12		)	172			160				—			—		(616		)	(68		)	—		—			5,707		(39		)
	Alt-A and other	6,454			(85		)	96			11				—			—		(1,021		)	69			—		—			5,513		(2		)
	Obligations of states and political subdivisions	2,898			—			(1		)	(1		)		—			—		—			(404		)	—		—			2,493		—
	Manufactured housing	668			—			—			—				—			—		—			(18		)	—		—			650		—
	Total available-for-sale mortgage-related securities	46,901			(147		)	1,376			1,229				4,364			—		(6,137		)	(657		)	45		(913		)	44,832		(166		)
	Trading, at fair value:
	Mortgage-related securities:
	Freddie Mac	1,252			41			—			41				915			7		(443		)	(13		)	—		(864		)	895		42
	Fannie Mae	167			(2		)	—			(2		)		—			—		—			(3		)	15		—			177		(2		)
	Ginnie Mae	—			—			—			—				—			—		—			—			—		—			—		—
	Other	6			—			—			—				—			—		—			(2		)	—		—			4		—
	Total trading mortgage-related securities	1,425			39			—			39				915			7		(443		)	(18		)	15		(864		)	1,076		40
	Other assets:
	Guarantee asset(7)	1,587			(41		)	—			(41		)		—			142		—			(118		)	—		—			1,570		(41		)
	All other, at fair value	12			(4		)	—			(4		)		—			—		—			—			—		—			8		(4		)
	Total other assets	1,599			(45		)	—			(45		)		—			142		—			(118		)	—		—			1,578		(45		)
					Realized and unrealized (gains) losses
		Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
		June 30,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		(gains)
		2014						comprehensive																		Level 3(5)		Level 3(5)			2014		losses
								income(1)																									still held(6)
		(in millions)
	Liabilities
	Other debt, at fair value	$	1,000		$	—		$	—		$	—			$	—		$	—	$	—		$	(1,000	)	$	—	$	—		$	—	$	—
	Net derivatives(8)	58			(66		)	—			(66		)		—			—		—			19			—		—			11		(49		)
		Nine Months Ended September 30, 2014
					Realized and unrealized gains (losses)
		Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
		January 1,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		gains (losses)
		2014						comprehensive																		Level 3(5)		Level 3(5)			2014		still held(6)
								income(1)
		(in millions)
	Assets
	Investments in securities:
	Available-for-sale, at fair value:
	Mortgage-related securities:
	Freddie Mac	$	1,939		$	1		$	3		$	4			$	5,567		$	—	$	(3,086	)	$	(79	)	$	3	$	(42	)	$	4,306	$	—
	Fannie Mae	131			—			(4		)	(4		)		48			—		(55		)	(15		)	1		—			106		—
	Ginnie Mae	12			—			—			—				—			—		(6		)	(3		)	1		—			4		—
	CMBS	3,109			—			269			269				—			—		—			(26		)	—		—			3,352		—
	Subprime	27,499			(456		)	2,556			2,100				—			—		(5,628		)	(1,270		)	—		—			22,701		(582		)
	Option ARM	6,574			(41		)	174			133				—			—		(791		)	(209		)	—		—			5,707		(72		)
	Alt-A and other	8,706			86			232			318				—			—		(3,409		)	(102		)	—		—			5,513		(33		)
	Obligations of states and political subdivisions	3,495			1			71			72				1			—		(13		)	(1,062		)	—		—			2,493		—
	Manufactured housing	684			—			21			21				—			—		—			(55		)	—		—			650		—
	Total available-for-sale mortgage-related securities	52,149			(409		)	3,322			2,913				5,616			—		(12,988		)	(2,821		)	5		(42		)	44,832		(687		)
Trading, at fair value:
Mortgage-related securities:
Freddie Mac	343			26			—			26				2,064			42		(1,480		)	(33		)	—		(67		)	895		30
Fannie Mae	221			(20		)	—			(20		)		14			—		—			(7		)	—		(31		)	177		(20		)
Ginnie Mae	74			—			—			—				—			—		(70		)	(4		)	—		—			—		(2		)
Other	8			(1		)	—			(1		)		—			—		—			(3		)	—		—			4		(1		)
Total trading mortgage-related securities	646			5			—			5				2,078			42		(1,550		)	(47		)	—		(98		)	1,076		7
Other assets:
Guarantee asset(7)	1,611			(146		)	—			(146		)		—			290		—			(185		)	—		—			1,570		(145		)
All other, at fair value	9			(1		)	—			(1		)		—			—		—			—			—		—			8		(1		)
Total other assets	1,620			(147		)	—			(147		)		—			290		—			(185		)	—		—			1,578		(146		)
				Realized and unrealized (gains) losses
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	January 1,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		(gains)
	2014						comprehensive																		Level 3(5)		Level 3(5)			2014		losses
							income(1)																									still held(6)
	(in millions)
Liabilities
Other debt, at fair value	$	1,528		$	(7	)	$	—		$	(7	)		$	—		$	—	$	—		$	(1,521	)	$	—	$	—		$	—	$	—
Net derivatives(8)	325			(95		)	—			(95		)		—			—		—			62			—		(281		)	11		(30		)
	Three Months Ended September 30, 2013
				Realized and unrealized gains (losses)
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	June 30,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		gains (losses)
	2013						comprehensive																		Level 3		Level 3			2013		still held(6)
							income(1)
	(in millions)
Assets
Investments in securities:
Available-for-sale, at fair value:
Mortgage-related securities:
Freddie Mac	$	2,325		$	—		$	122		$	122			$	1,781		$	—	$	—		$	(67	)	$	—	$	(575	)	$	3,586	$	—
Fannie Mae	143			—			(1		)	(1		)		—			—		—			(5		)	—		—			137		—
Ginnie Mae	14			—			—			—				—			—		—			(1		)	—		—			13		—
CMBS	3,239			—			(40		)	(40		)		—			—		—			(5		)	—		—			3,194		—
Subprime	28,004			(46		)	639			593				—			—		(46		)	(979		)	—		—			27,572		(45		)
Option ARM	6,636			(16		)	20			4				—			—		(38		)	(178		)	—		—			6,424		(12		)
Alt-A and other	10,055			(73		)	353			280				—			—		(826		)	(406		)	—		—			9,103		(65		)
Obligations of states and political subdivisions	4,281			—			(51		)	(51		)		—			—		(7		)	(462		)	—		—			3,761		—
Manufactured housing	681			—			28			28				—			—		—			(21		)	—		—			688		—
Total available-for-sale mortgage-related securities	55,378			(135		)	1,070			935				1,781			—		(917		)	(2,124		)	—		(575		)	54,478		(122		)
Trading, at fair value:
Mortgage-related securities:
Freddie Mac	597			9			—			9				1,360			—		(335		)	(5		)	—		(319		)	1,307		5
Fannie Mae	188			(8		)	—			(8		)		—			—		—			(4		)	—		—			176		(8		)
Ginnie Mae	81			—			—			—				—			—		—			(3		)	—		—			78		—
Other	9			—			—			—				—			—		—			(1		)	—		—			8		—
Total trading mortgage-related securities	875			1			—			1				1,360			—		(335		)	(13		)	—		(319		)	1,569		(3		)
Mortgage loans:
Held-for-sale, at fair value	11,696			—			—			—				—			—		—			—			—		(11,696		)	—		—
Other assets:
Guarantee asset(7)	1,289			14			—			14				—			156		—			(27		)	—		—			1,432		14
All other, at fair value	8			2			—			2				—			—		—			—			—		—			10		2
Total other assets	1,297			16			—			16				—			156		—			(27		)	—		—			1,442		16
				Realized and unrealized (gains) losses
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	June 30,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		(gains) losses
	2013						comprehensive																		Level 3		Level 3			2013		still held(6)
							income(1)
	(in millions)
Liabilities
Other debt, at fair value	$	1,508		$	31		$	—		$	31			$	—		$	500	$	—		$	(8	)	$	—	$	—		$	2,031	$	31
Net derivatives(8)	343			(96		)	—			(96		)		—			2		—			2			—		(2		)	249		(84		)
	Nine Months Ended September 30, 2013
				Realized and unrealized gains (losses)
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	January 1,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		gains (losses)
	2013						comprehensive																		Level 3		Level 3			2013		still held(6)
							income(1)
	(in millions)
Assets
Investments in securities:
Available-for-sale, at fair value:
Mortgage-related securities:
Freddie Mac	$	1,802		$	—		$	113		$	113			$	1,780		$	—	$	—		$	(109	)	$	—	$	—		$	3,586	$	—
Fannie Mae	163			—			(3		)	(3		)		—			—		—			(23		)	—		—			137		—
Ginnie Mae	16			—			—			—				—			—		—			(3		)	—		—			13		—
CMBS	3,429			—			(216		)	(216		)		—			—		—			(19		)	—		—			3,194		—
Subprime	26,457			(94		)	4,632			4,538				—			—		(346		)	(3,077		)	—		—			27,572		(91		)
Option ARM	5,717			(21		)	1,346			1,325				—			—		(38		)	(580		)	—		—			6,424		(17		)
Alt-A and other	10,904			(52		)	980			928				—			—		(1,572		)	(1,157		)	—		—			9,103		(91		)
Obligations of states and political subdivisions	5,798			13			(173		)	(160		)		(10		)	—		(533		)	(1,334		)	—		—			3,761		—
Manufactured housing	709			(1		)	46			45				—			—		—			(66		)	—		—			688		(1		)
Total available-for-sale mortgage-related securities	54,995			(155		)	6,725			6,570				1,770			—		(2,489		)	(6,368		)	—		—			54,478		(200		)
Trading, at fair value:
Mortgage-related securities:
Freddie Mac	1,165			(51		)	—			(51		)		1,177			229		(360		)	(37		)	—		(816		)	1,307		(54		)
Fannie Mae	312			(57		)	—			(57		)		2			—		(2		)	(12		)	—		(67		)	176		(57		)
Ginnie Mae	92			(1		)	—			(1		)		3			—		—			(12		)	—		(4		)	78		(1		)
Other	21			—			—			—				—			—		—			(3		)	—		(10		)	8		—
Total trading mortgage-related securities	1,590			(109		)	—			(109		)		1,182			229		(362		)	(64		)	—		(897		)	1,569		(112		)
Mortgage loans:
Held-for-sale, at fair value	14,238			—			—			—				—			—		—			—			—		(14,238		)	—		—
Other assets:
Guarantee asset(7)	1,029			(2		)	—			(2		)		—			484		—			(79		)	—		—			1,432		(2		)
All other, at fair value	114			31			—			31				—			—		(135		)	—			—		—			10		8
Total other assets	1,143			29			—			29				—			484		(135		)	(79		)	—		—			1,442		6
				Realized and unrealized (gains) losses
	Balance,			Included in			Included in			Total				Purchases			Issues		Sales			Settlements,			Transfers		Transfers			Balance,		Unrealized
	January 1,			earnings(1)(2)(3)(4)			other															net			into		out of			September 30,		(gains) losses
	2013						comprehensive																		Level 3		Level 3			2013		still held(6)
							income(1)
	(in millions)
Liabilities
Other debt, at fair value	$	2,187		$	23		$	—		$	23			$	—		$	500	$	—		$	(679	)	$	—	$	—		$	2,031	$	(15	)
Net derivatives(8)	47			232			—			232				—			6		—			(36		)	—		—			249		200
-1	Changes in fair value for available-for-sale securities are recorded in AOCI, while gains and losses from sales are recorded in other gains (losses) on investment securities recognized in earnings on our consolidated statements of comprehensive income. For mortgage-related securities classified as trading, the realized and unrealized gains (losses) are recorded in other gains (losses) on investment securities recognized in earnings on our consolidated statements of comprehensive income.
-2	Changes in fair value of derivatives not designated as accounting hedges are recorded in derivative gains (losses) on our consolidated statements of comprehensive income.
-3	Changes in fair value of the guarantee asset are recorded in other income on our consolidated statements of comprehensive income.
-4	For held-for-sale mortgage loans with the fair value option elected, gains (losses) on fair value changes and from sales of mortgage loans are recorded in other income on our consolidated statements of comprehensive income.
-5	Transfers out of Level 3 during the three and nine months ended September 30, 2014 consist primarily of certain mortgage-related securities and certain derivatives due to an increased volume and level of activity in the market and availability of price quotes from dealers and third-party pricing services. Transfers into Level 3 during the three and nine months ended September 30, 2014 consist primarily of certain mortgage-related securities due to a lack of relevant price quotes from dealers and third-party pricing services.
-6	Represents the amount of total gains or losses for the period, included in earnings, attributable to the change in unrealized gains and losses related to assets and liabilities classified as Level 3 that were still held at September 30, 2014 and 2013, respectively. Included in these amounts are other-than-temporary impairments recorded on available-for-sale securities.
-7	We estimate that all amounts recorded for unrealized gains and losses on our guarantee asset relate to those guarantee asset amounts still recorded on our balance sheet. The amounts reflected as included in earnings represent the periodic fair value changes of our guarantee asset.
-8	Net derivatives include derivative assets and derivative liabilities prior to counterparty netting, cash collateral netting, net trade/settle receivable or payable and net derivative interest receivable or payable.
Table - Assets on Our Consolidated Balance Sheets Measured at Fair Value on a Non-Recurring Basis	'
	Table 16.3 — Assets on Our Consolidated Balance Sheets Measured at Fair Value on a Non-Recurring Basis
		September 30, 2014													31-Dec-13
		Level 1			Level 2			Level 3			Total				Level 1			Level 2		Level 3			Total
		(in millions)
	Assets measured at fair value on a non-recurring basis:
	Mortgage loans:(1)	$	—		$	—		$	9,265		$	9,265			$	—		$	—	$	515		$	515
	REO, net(2)	—			—			1,259			1,259				—			—		1,837			1,837
	Total assets measured at fair value on a non-recurring basis	$	—		$	—		$	10,524		$	10,524			$	—		$	—	$	2,352		$	2,352
	-1	These loans include impaired single-family and multifamily mortgage loans that are classified as held-for-investment and have a related valuation allowance based on the fair value of the underlying collateral.
	-2	Represents the fair value and related losses of foreclosed properties that were measured at fair value subsequent to their initial classification as REO, net. The carrying amount of REO, net was written down to fair value of $1.3 billion, less estimated costs to sell of $83 million (or approximately $1.2 billion) at September 30, 2014. The carrying amount of REO, net was written down to fair value of $1.8 billion, less estimated costs to sell of $118 million (or approximately $1.7 billion) at December 31, 2013.
Table - Quantitative Information about Recurring Level 3 Fair Value Measurements	'
	Table 16.4 — Quantitative Information about Recurring Level 3 Fair Value Measurements
		30-Sep-14
		Total			Level  3			Predominant		Unobservable Inputs(1)
		Fair			Fair			Valuation
		Value			Value			Technique(s)		Type	Range		Weighted
													Average
		(dollars in millions)
	Recurring fair value measurements
	Assets
	Investments in securities
	Available-for-sale, at fair value
	Mortgage-related securities
	Freddie Mac				$	1,966		Risk metric		Effective duration(2)	0.96 - 8.84 years		2.11 years
					1,781			Discounted cash flows		OAS	(146) - 141 bps		37 bps
					559			Other
	Total Freddie Mac	$	41,363		4,306
	Fannie Mae				60			Discounted cash flows		OAS	(5,649) - 1,082 bps		91 bps
					43			Median of external sources		External pricing sources	$107.9 - $112.5		$	110.2
					3			Other
	Total Fannie Mae	10,526			106
	Ginnie Mae				4			Discounted cash flows
	Total Ginnie Mae	210			4
	CMBS				2,446			Single external source		External pricing source	$99.0 - $99.0		$	99
					369			Risk Metrics		Effective duration(2)	5.67 - 10.04 years		7.49 years
					537			Other
	Total CMBS	23,614			3,352
	Subprime, option ARM, and Alt-A:
	Subprime				21,170			Median of external sources		External pricing sources	$70.4 - $75.8		$	73.1
					1,531			Other
	Total subprime	22,701			22,701
	Option ARM				4,342			Median of external sources		External pricing sources	$65.7 - $71.0		$	68.3
					16			Single external source		External pricing source	$51.1 - $51.1		$	51.1
					1,349			Other
	Total option ARM	5,707			5,707
	Alt-A and other				4,643			Median of external sources		External pricing sources	$83.8 - $86.5		$	85.2
					870			Other
	Total Alt-A and other	5,513			5,513
	Obligations of states and political subdivisions				2,289			Median of external sources		External pricing sources	$101.0 - $101.8		$	101.4
					204			Other
	Total obligations of states and political subdivisions	2,493			2,493
	Manufactured housing				478			Single external source		External pricing source	$91.0 - $91.0		$	91
					146			Discounted cash flows		OAS	290- 640 bps		373 bps
					26			Other
	Total manufactured housing	650			650
	Total available-for-sale mortgage-related securities	112,777			44,832
	Trading, at fair value
	Mortgage-related securities
	Freddie Mac				628			Discounted cash flows		OAS	(197) - 9,748 bps		268 bps
					110			Risk Metrics		Effective duration(2)	(19.99) - 2.83 years		1.41 years
					157			Other
	Total Freddie Mac	14,900			895
	Fannie Mae				177			Discounted cash flows		OAS	(97) - 2,039 bps		427 bps
	Total Fannie Mae	6,238			177
	Ginnie Mae	17			—
	Other				3			Median of external sources
					1			Discounted cash flows
	Total other	120			4
	Total trading mortgage-related securities	21,275			1,076
	Total investments in securities	$	134,052		$	45,908
	Other assets:
	Guarantee asset, at fair value				$	1,201		Discounted cash flows		OAS	17- 202 bps		55 bps
					369			Median of external sources		External pricing sources	$10.8 - $23.7		$	18
	Total guarantee asset, at fair value	$	1,570		1,570
All other, at fair value				8			Other
Total all other, at fair value	8			8
Total other assets	1,578			1,578
Liabilities
Net derivatives				11			Other
Total net derivatives	1,033			11
	December 31, 2013
	Total			Level  3			Predominant		Unobservable Inputs(1)
	Fair			Fair			Valuation
	Value			Value			Technique(s)		Type	Range		Weighted
												Average
	(dollars in millions)
Recurring fair value measurements
Assets
Investments in securities
Available-for-sale, at fair value
Mortgage-related securities
Freddie Mac				$	1,547		Risk metric		Effective duration(2)	2.25 -5.17 years		2.44 years
				133			Single external source		External pricing source	$99.3 - $99.3		$	99.3
				259			Other
Total Freddie Mac	$	40,659		1,939
Fannie Mae				91			Single external source		External pricing source	$110.5 - $110.5		$	110.5
				26			Median of external sources		External pricing sources	$104.1 - $105.3		$	104.7
				14			Other
Total Fannie Mae	10,797			131
Ginnie Mae				6			Median of external sources
				6			Discounted cash flows
Total Ginnie Mae	167			12
CMBS				2,942			Single external source		External pricing source	$90.9 - $90.9		$	90.9
				167			Other
Total CMBS	30,338			3,109
Subprime, option ARM, and Alt-A:
Subprime				25,367			Median of external sources		External pricing sources	$64.5 - $73.8		$	68.7
				2,132			Other
Total subprime	27,499			27,499
Option ARM				4,995			Median of external sources		External pricing sources	$60.8 - $67.0		$	64.4
				705			Discounted cash flows		OAS	461 - 944 bps		729 bps
				874			Other
Total option ARM	6,574			6,574
Alt-A and other				4,028			Single external source		External pricing source	$83.4 - $83.4		$	83.4
				3,503			Median of external sources		External pricing sources	$72.5 - $79.1		$	75.7
				1,175			Other
Total Alt-A and other	8,706			8,706
Obligations of states and political subdivisions				3,067			Median of external sources		External pricing sources	$98.7 - $99.7		$	99.2
				428			Other
Total obligations of states and political subdivisions	3,495			3,495
Manufactured housing				577			Median of external sources		External pricing sources	$86.7 - $92.8		$	89.7
				107			Other
Total manufactured housing	684			684
Total available-for-sale mortgage-related securities	128,919			52,149
Trading, at fair value
Mortgage-related securities
Freddie Mac				297			Discounted cash flows		OAS	(5) - 9,441 bps		364 bps
				46			Other
Total Freddie Mac	9,349			343
Fannie Mae				191			Discounted cash flows		OAS	(2,257) - 2,295 bps		199 bps
				30			Other
Total Fannie Mae	7,180			221
Ginnie Mae				74			Median of external sources
Total Ginnie Mae	98			74
Other				7			Single external source
				1			Other
Total other	141			8
Total trading mortgage-related securities	16,768			646
Total investments in securities	$	145,687		$	52,795
Other assets:
Guarantee asset, at fair value				$	1,163		Discounted cash flows		OAS	16 - 202 bps		53 bps
				448			Median of external sources		External pricing sources	$11.6 - $25.4		$	19.2
Total guarantee asset, at fair value	$	1,611		1,611
All other, at fair value				9			Other
Total all other, at fair value	9			9
Total other assets	1,620			1,620
Liabilities
Other debt, at fair value				1,000			Single external source		External pricing source	$100.0 - $100.0		$	100
				528			Median of external sources		External pricing sources	$100.0 - $100.1		$	100
Total other debt recorded at fair value	2,683			1,528
Net derivatives				283			Single external source		External pricing source	$0.8 - $0.8		$	0.8
				37			Discounted cash flows
				5			Other
Total net derivatives	(883		)	325
-1	Certain unobservable input types, range, and weighted average data are not disclosed in this table if they are associated with a class: (a) that has a Level 3 fair value measurement that is not considered material; or (b) where we have disclosed the predominant valuation technique with related unobservable inputs for the most significant portion of that class.
-2	Effective duration is used as a proxy to represent the aggregate impact of key rate durations.
Table - Quantitative Information about Non-Recurring Level 3 Fair Value Measurements	'
	Table 16.5 — Quantitative Information about Non-Recurring Level 3 Fair Value Measurements
		30-Sep-14
		Total			Level 3			Predominant		Unobservable Inputs(1)
		Fair			Fair			Valuation
		Value			Value			Technique(s)		Type	Range		Weighted
													Average
		(dollars in millions)
	Non-recurring fair value measurements
	Mortgage loans	$	9,265		$	9,265
								Internal model(2)		Historical sales	$3,000 - $815,800		$122,124
										proceeds
								Internal model(2)		Housing sales index	37 - 305 bps		84 bps
								Third-party appraisal		Property value	$9 million - $44 million		$33 million
								Income capitalization		Capitalization rates(3)	6% - 9%		7%
	REO, net	$	1,259		$	1,259
								Internal model(2)		Historical sales	$3,000 - $733,643		$114,287
										proceeds
								Internal model(2)		Housing sales index	37 - 305 bps		84 bps
		31-Dec-13
		Total			Level  3			Predominant		Unobservable Inputs(1)
		Fair			Fair			Valuation
		Value			Value			Technique(s)		Type	Range		Weighted
													Average
		(dollars in millions)
	Non-recurring fair value measurements
	Mortgage loans	$	515		$	515
								Income capitalization		Capitalization rates(3)	6% - 9%		7%
								Third-party appraisal		Property value	$4 million - $44 million		$27 million
	REO, net	$	1,837		$	1,837		Internal model(4)		Historical average sales	$17,500- $318,391		$105,508
										proceeds per property
										by state(5)
	-1	Certain unobservable input types, range, and weighted average data are not disclosed in this table if they are associated with a class: (a) that has a Level 3 fair value measurement that is not considered material; or (b) where we have disclosed the predominant valuation technique with related unobservable inputs for the most significant portion of that class.
	-2	Represents an internal model that uses REO disposition, short sale and third-party sale values for loans, combined with loan level characteristics using the repeat housing sales index to estimate the current fair value of the REO or loan. This valuation technique is used to measure both the initial value of REO and the valuation of REO at the lower of cost or fair value, as necessary, and the allowance for held-for-investment mortgage loans to collateral value.
	-3	The capitalization rate “Range” and “Weighted Average” represent those loans that are valued using the Income Capitalization approach, which is the predominant valuation technique used for this population of multifamily mortgage loans. Certain loans in this population are valued using other techniques, and the capitalization rate for those is not represented in the “Range” or “Weighted Average” above.
	-4	Represents an internal model that uses actual REO disposition prices for the prior three months, calibrated to the most recent month's disposition prices, to determine the average sales proceeds per property at the state level, expressed as a fixed percentage based on the ratio of the disposition price to the UPB of the associated loan. This valuation technique is used to measure both the initial value of REO and the valuation of REO at the lower of cost or fair value, as necessary.
	-5	Represents the average of three months of REO sales proceeds by state. The national average REO disposition severity ratio for our REO properties was 35.8% for the three months ended December 31, 2013.
Table - Fair Value of Financial Instruments	'
	Table 16.6 — Fair Value of Financial Instruments
		30-Sep-14
					Fair Value
		Carrying  Amount(1)			Level 1			Level 2			Level 3				Netting Adjustments			Total
		(in millions)
	Financial Assets
	Cash and cash equivalents	$	16,191		$	16,191		$	—		$	—			$	—		$	16,191
	Restricted cash and cash equivalents	6,264			6,264			—			—				—			6,264
	Federal funds sold and securities purchased under agreements to resell	29,956			—			29,956			—				—			29,956
	Investments in securities:
	Available-for-sale, at fair value	112,777			—			67,945			44,832				—			112,777
	Trading, at fair value	30,434			9,159			20,199			1,076				—			30,434
	Total investments in securities	143,211			9,159			88,144			45,908				—			143,211
	Mortgage loans:
	Mortgage loans held by consolidated trusts	1,549,533			—			1,353,333			203,835				—			1,557,168
	Unsecuritized mortgage loans	141,438			—			17,416			120,973				—			138,389
	Total mortgage loans	1,690,971			—			1,370,749			324,808				—			1,695,557
	Derivative assets, net	897			—			9,031			36				(8,170		)	897
	Guarantee asset	1,570			—			—			1,794				—			1,794
	Advances to lenders	67			—			67			—				—			67
	Total financial assets	$	1,889,127		$	31,614		$	1,497,947		$	372,546			$	(8,170	)	$	1,893,937
	Financial Liabilities
	Debt, net:
	Debt securities of consolidated trusts held by third parties	$	1,467,845		$	—		$	1,494,687		$	2,228			$	—		$	1,496,915
	Other debt	435,706			—			432,829			9,983				—			442,812
	Total debt, net	1,903,551			—			1,927,516			12,211				—			1,939,727
	Derivative liabilities, net	1,930			—			10,384			47				(8,501		)	1,930
	Guarantee obligation	1,561			—			—			3,211				—			3,211
	Total financial liabilities	$	1,907,042		$	—		$	1,937,900		$	15,469			$	(8,501	)	$	1,944,868
		December 31, 2013
					Fair Value
		Carrying Amount(1)			Level 1			Level 2			Level 3				Netting Adjustments			Total
		(in millions)
	Financial Assets
	Cash and cash equivalents	$	11,281		$	11,281		$	—		$	—			$	—		$	11,281
	Restricted cash and cash equivalents	12,265			12,264			1			—				—			12,265
	Federal funds sold and securities purchased under agreements to resell	62,383			—			62,383			—				—			62,383
	Investments in securities:
	Available-for-sale, at fair value	128,919			—			76,770			52,149				—			128,919
	Trading, at fair value	23,404			6,636			16,122			646				—			23,404
	Total investments in securities	152,323			6,636			92,892			52,795				—			152,323
	Mortgage loans:
	Mortgage loans held by consolidated trusts	1,529,905			—			1,258,049			249,693				—			1,507,742
	Unsecuritized mortgage loans	154,885			—			16,145			122,065				—			138,210
	Total mortgage loans	1,684,790			—			1,274,194			371,758				—			1,645,952
	Derivative assets, net	1,063			—			14,220			11				(13,168		)	1,063
	Guarantee asset	1,611			—			—			1,879				—			1,879
	Total financial assets	$	1,925,716		$	30,181		$	1,443,690		$	426,443			$	(13,168	)	$	1,887,146
	Financial Liabilities
	Debt, net:
	Debt securities of consolidated trusts held by third parties	$	1,433,984		$	—		$	1,434,208		$	2,690			$	—		$	1,436,898
	Other debt	506,767			—			499,756			13,089				—			512,845
	Total debt, net	1,940,751			—			1,933,964			15,779				—			1,949,743
	Derivative liabilities, net	180			—			13,291			336				(13,447		)	180
	Guarantee obligation	1,522			—			—			3,067				—			3,067
	Total financial liabilities	$	1,942,453		$	—		$	1,947,255		$	19,182			$	(13,447	)	$	1,952,990
	-1	Equals the amount reported on our GAAP consolidated balance sheets.
Table - Difference between Fair Value and Unpaid Principal Balance for Certain Financial Instruments with Fair Value Option Elected	'
	Table 16.7 — Difference between Fair Value and Unpaid Principal Balance for Certain Financial Instruments with Fair Value Option Elected
		30-Sep-14						31-Dec-13
		Multifamily			Other Debt -			Multifamily			Other Debt -
		Held-For-Sale			Long Term			Held-For-Sale			Long Term
		Mortgage Loans						Mortgage Loans
		(in millions)
	Fair value	$	7,719		$	4,988		$	8,727		$	2,683
	Unpaid principal balance	7,615			4,901			8,721			2,635
	Difference	$	104		$	87		$	6		$	48

Regulatory_Capital_Tables

Regulatory Capital (Tables)	9 Months Ended
	Sep. 30, 2014
Mortgage Banking [Abstract]	'
Table - Net Worth and Minimum Capital	'
	Table 18.1 — Net Worth and Minimum Capital
		30-Sep-14			31-Dec-13
		(in millions)
	GAAP net worth(1)	$	5,186		$	12,835
	Core capital (deficit)(2)(3)	$	(68,856	)	$	(59,495	)
	Less: Minimum capital requirement(2)	19,711			21,404
	Minimum capital surplus (deficit)(2)	$	(88,567	)	$	(80,899	)
	-1	Net worth (deficit) represents the difference between our assets and liabilities under GAAP.
	-2	Core capital and minimum capital figures for September 30, 2014 are estimates. FHFA is the authoritative source for our regulatory capital.
	-3	Core capital excludes certain components of GAAP total equity (i.e., AOCI and the liquidation preference of the senior preferred stock) as these items do not meet the statutory definition of core capital.

Selected_Financial_Statement_L1

Selected Financial Statement Line Items (Tables)	9 Months Ended
	Sep. 30, 2014
Selected Financial Statement Data [Abstract]	'
Table - Significant Components of Other Income (Loss) on Our Consolidated Statements of Comprehensive Income	'
	Table 19.1 — Significant Components of Other Income (Loss) on Our Consolidated Statements of Comprehensive Income
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
		(in millions)
	Other income (loss):
	Non-agency mortgage-related securities settlements(1)	$	1,187	$	549	$	6,084	$	660
	Gains (losses) on mortgage loans	168		114		383		(440		)
	Other	441		328		862		919
	Total other income (loss)	$	1,796	$	991	$	7,329	$	1,139
	-1	Settlement agreements primarily related to lawsuits regarding our investments in certain non-agency mortgage-related securities is a significant component of other income during the three and nine months ended September 30, 2014. For more information, see “NOTE 15: CONCENTRATION OF CREDIT AND OTHER RISKS — Non-Agency Mortgage-Related Security Issuers.”
Table - Significant Components of Other Assets and Other Liabilities on Our Consolidated Balance Sheets	'
	Table 19.2 — Significant Components of Other Assets and Other Liabilities on Our Consolidated Balance Sheets
		30-Sep-14		31-Dec-13
		(in millions)
	Other assets:
	Accounts and other receivables(1)	$	3,073	$	4,367
	Current income tax receivable	2,014		1,316
	Guarantee asset	1,570		1,611
	All other	1,206		1,245
	Total other assets	$	7,863	$	8,539
	Other liabilities:
	Servicer liabilities	$	1,916	$	2,277
	Guarantee obligation	1,561		1,522
	Accounts payable and accrued expenses	886		886
	All other	1,537		807
	Total other liabilities	$	5,900	$	5,492
	-1	Primarily consists of servicer receivables and other non-interest receivables.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
	numberofreportablesegments
Accounting Policies [Abstract]	'	'
Number of reportable segments	3	'
Statement [Line Items]	'	'
Net cash provided by operating activities	$11,314	$8,254
Net cash used in financing activities	-188,817	-329,318
Reclassification adjustment	'	'
Statement [Line Items]	'	'
Net cash provided by operating activities	'	-1,100
Net cash used in financing activities	'	$1,100

Conservatorship_and_Related_Ma1

Conservatorship and Related Matters (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
	numberofstrategicgoals	numberofstrategicgoals
Conservatorship and Related Matters [Abstract]	'	'
Number of strategic goals	3	3
Maximum limit of the UPB of mortgage-related investments portfolio	$470,000,000,000	$470,000,000,000
UPB of mortgage-related investments portfolio	414,000,000,000	414,000,000,000
Annual percentage reduction of the mortgage-related investments portfolio	'	15.00%
Minimum limit of the UPB of mortgage-related investments portfolio	250,000,000,000	250,000,000,000
Draw received	0	'
Aggregate dividend payments since conservatorship began	88,200,000,000	88,200,000,000
Expected draw request from Treasury	$0	$0

Variable_Interest_Entities_Det

Variable Interest Entities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Single-family PC trusts	'	'
Variable Interest Entity [Line Items]	'	'
Total assets of VIEs	$1,500,000	$1,500,000
Other Guarantee Transactions	'	'
Variable Interest Entity [Line Items]	'	'
Total assets of VIEs	$7,400	$8,900

Variable_Interest_Entities_Var

Variable Interest Entities - Variable Interests in VIEs for which We are not the Primary Beneficiary (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets [Abstract]	'	'
Restricted Cash and Cash Equivalents	$6,264	$12,265
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	112,777	128,919
Trading Securities, Debt	30,434	23,404
Mortgage Loans [Abstract]	'	'
Mortgage loans held-for-investment	1,683,252	1,676,063
Mortgage loans held-for-sale	7,719	8,727
Accrued interest receivable	6,039	6,150
Other Assets	7,863	8,539
Liabilities [Abstract]	'	'
Derivative liabilities, net	-1,930	-180
Other Liabilities	-5,900	-5,492
Freddie Mac Securities	'	'
Assets [Abstract]	'	'
Restricted Cash and Cash Equivalents	12	6
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	41,363	40,659
Trading Securities, Debt	14,900	9,349
Mortgage Loans [Abstract]	'	'
Mortgage loans held-for-investment	0	0
Mortgage loans held-for-sale	0	0
Accrued interest receivable	233	232
Other Assets	876	833
Liabilities [Abstract]	'	'
Derivative liabilities, net	0	-3
Other Liabilities	-959	-875
Maximum Exposure to Loss	81,383	72,072
Total Assets of Non-Consolidated VIEs	95,740	84,731
Non Freddie Mac Securities	'	'
Assets [Abstract]	'	'
Restricted Cash and Cash Equivalents	0	0
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	68,921	84,765
Trading Securities, Debt	6,372	7,414
Mortgage Loans [Abstract]	'	'
Mortgage loans held-for-investment	0	0
Mortgage loans held-for-sale	0	0
Accrued interest receivable	182	226
Other Assets	3	14
Liabilities [Abstract]	'	'
Derivative liabilities, net	0	0
Other Liabilities	0	-2
Maximum Exposure to Loss	72,919	92,559
Total Assets of Non-Consolidated VIEs	395,650	506,699
Unsecuritized Multifamily Loans	'	'
Assets [Abstract]	'	'
Restricted Cash and Cash Equivalents	10	8
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	0	0
Trading Securities, Debt	0	0
Mortgage Loans [Abstract]	'	'
Mortgage loans held-for-investment	43,942	50,306
Mortgage loans held-for-sale	7,719	8,727
Accrued interest receivable	217	261
Other Assets	268	407
Liabilities [Abstract]	'	'
Derivative liabilities, net	0	0
Other Liabilities	-18	-12
Maximum Exposure to Loss	52,156	59,710
Total Assets of Non-Consolidated VIEs	94,567	105,120
Other	'	'
Assets [Abstract]	'	'
Restricted Cash and Cash Equivalents	66	58
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	0	0
Trading Securities, Debt	0	0
Mortgage Loans [Abstract]	'	'
Mortgage loans held-for-investment	0	0
Mortgage loans held-for-sale	0	0
Accrued interest receivable	7	7
Other Assets	470	477
Liabilities [Abstract]	'	'
Derivative liabilities, net	-32	-35
Other Liabilities	-602	-558
Maximum Exposure to Loss	10,282	10,415
Total Assets of Non-Consolidated VIEs	$22,619	$23,707

Mortgage_Loans_and_Loan_Loss_R2

Mortgage Loans and Loan Loss Reserves (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Billions, unless otherwise specified

Jun. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

transaction

Unsecuritized

Unsecuritized

Held by consolidated trusts

Held by consolidated trusts

Single-family

Single-family

Single-family

Single-family

Multifamily

Multifamily

Multifamily

Multifamily

Accounts, Notes, Loans and Financing Receivables [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Financing Receivable, Significant Purchases

'

'

'

'

'

'

'

$75.80

$94.60

$182.20

$351.20

$0.30

$0.30

$1.60

$0.70

Financing Receivable, Significant Sales

'

'

'

'

'

'

'

'

'

'

'

4.5

6.4

12.9

20.8

Recorded investment of mortgage loans reclassified to held-for-sale

0.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percent of Single-Family Credit Guarantee portfolio with second lien financing by third parties at origination

'

14.00%

14.00%

'

'

'

'

'

'

'

'

'

'

'

'

Allowance for loan losses as a percentage of recorded investment of mortgage loans, held for investment

'

'

'

12.70%

12.90%

0.20%

0.20%

'

'

'

'

'

'

'

'

Mortgage loan UPB covered by federal agency issued insurance or partial guarantee

'

$3.70

$3.90

'

'

'

'

'

'

'

'

'

'

'

'

Number of STACR transactions

'

5

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of ACIS transactions

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

Mortgage_Loans_and_Loan_Loss_R3

Mortgage Loans and Loan Loss Reserves - Mortgage Loans (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	$1,691,969	'	$1,690,474	'	'	'
Deferred fees, unamortized premiums, discounts and other cost basis adjustments	21,472	'	18,928	'	'	'
Fair value adjustments on loans held-for-sale	104	'	6	'	'	'
Allowance for loan losses on mortgage loans held-for-investment	-22,574	'	-24,618	'	'	'
Total mortgage loans, net	1,690,971	'	1,684,790	'	'	'
Mortgage loans held-for-investment	1,683,252	'	1,676,063	'	'	'
Mortgage loans held-for-sale	7,719	'	8,727	'	'	'
Total mortgage loans, net	1,690,971	'	1,684,790	'	'	'
Single-family	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	1,639,790	'	1,630,859	'	'	'
Allowance for loan losses on mortgage loans held-for-investment	-22,493	'	-24,493	'	'	'
Mortgage loans held-for-investment	1,638,785	'	1,625,314	'	'	'
Single-family | Fixed-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	1,535,180	'	1,522,740	'	'	'
Single-family | Fixed-rate amortizing	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	1,530,542	'	1,516,438	'	'	'
Single-family | Fixed-rate interest-only	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	4,638	'	6,302	'	'	'
Single-family | Adjustable-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	93,550	'	95,781	'	'	'
Single-family | Adjustable-rate amortizing	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	68,974	'	67,364	'	'	'
Single-family | Adjustable-rate interest-only	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	24,576	'	28,417	'	'	'
Single-family | Other Guarantee Transactions	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	7,366	'	8,431	'	'	'
Single-family | FHA/VA and other governmental	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	3,694	'	3,907	'	'	'
Multifamily	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	52,179	'	59,615	'	'	'
Allowance for loan losses on mortgage loans held-for-investment	-81	'	-125	'	'	'
Mortgage loans held-for-investment	44,467	'	50,749	'	'	'
Multifamily | Fixed-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	44,563	'	51,145	'	'	'
Multifamily | Adjustable-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	7,613	'	8,467	'	'	'
Multifamily | FHA/VA and other governmental	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	3	'	3	'	'	'
Unsecuritized	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	164,422	'	181,308	'	'	'
Deferred fees, unamortized premiums, discounts and other cost basis adjustments	-3,615	'	-4,817	'	'	'
Fair value adjustments on loans held-for-sale	104	'	6	'	'	'
Allowance for loan losses on mortgage loans held-for-investment	-19,473	-20,047	-21,612	-22,128	-23,068	-25,788
Total mortgage loans, net	141,438	'	154,885	'	'	'
Mortgage loans held-for-investment	133,719	'	146,158	'	'	'
Mortgage loans held-for-sale	7,719	'	8,727	'	'	'
Total mortgage loans, net	141,438	'	154,885	'	'	'
Unsecuritized | Single-family	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	112,768	'	122,137	'	'	'
Allowance for loan losses on mortgage loans held-for-investment	-19,392	-19,956	-21,487	-21,951	-22,862	-25,449
Unsecuritized | Single-family | Fixed-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	107,099	'	115,073	'	'	'
Unsecuritized | Single-family | Fixed-rate amortizing	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	106,068	'	113,597	'	'	'
Unsecuritized | Single-family | Fixed-rate interest-only	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	1,031	'	1,476	'	'	'
Unsecuritized | Single-family | Adjustable-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	5,166	'	6,511	'	'	'
Unsecuritized | Single-family | Adjustable-rate amortizing	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	1,644	'	1,935	'	'	'
Unsecuritized | Single-family | Adjustable-rate interest-only	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	3,522	'	4,576	'	'	'
Unsecuritized | Single-family | Other Guarantee Transactions	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	0	'	0	'	'	'
Unsecuritized | Single-family | FHA/VA and other governmental	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	503	'	553	'	'	'
Unsecuritized | Multifamily	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	51,654	'	59,171	'	'	'
Allowance for loan losses on mortgage loans held-for-investment	-81	-91	-125	-177	-206	-339
Unsecuritized | Multifamily | Fixed-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	44,038	'	50,701	'	'	'
Unsecuritized | Multifamily | Adjustable-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	7,613	'	8,467	'	'	'
Unsecuritized | Multifamily | FHA/VA and other governmental	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	3	'	3	'	'	'
Held by consolidated trusts	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	1,527,547	'	1,509,166	'	'	'
Deferred fees, unamortized premiums, discounts and other cost basis adjustments	25,087	'	23,745	'	'	'
Fair value adjustments on loans held-for-sale	0	'	0	'	'	'
Allowance for loan losses on mortgage loans held-for-investment	-3,101	-2,652	-3,006	-2,733	-3,222	-4,919
Total mortgage loans, net	1,549,533	'	1,529,905	'	'	'
Mortgage loans held-for-investment	1,549,533	'	1,529,905	'	'	'
Mortgage loans held-for-sale	0	'	0	'	'	'
Total mortgage loans, net	1,549,533	'	1,529,905	'	'	'
Held by consolidated trusts | Single-family	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	1,527,022	'	1,508,722	'	'	'
Allowance for loan losses on mortgage loans held-for-investment	-3,101	-2,652	-3,006	-2,733	-3,222	-4,918
Held by consolidated trusts | Single-family | Fixed-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	1,428,081	'	1,407,667	'	'	'
Held by consolidated trusts | Single-family | Fixed-rate amortizing	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	1,424,474	'	1,402,841	'	'	'
Held by consolidated trusts | Single-family | Fixed-rate interest-only	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	3,607	'	4,826	'	'	'
Held by consolidated trusts | Single-family | Adjustable-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	88,384	'	89,270	'	'	'
Held by consolidated trusts | Single-family | Adjustable-rate amortizing	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	67,330	'	65,429	'	'	'
Held by consolidated trusts | Single-family | Adjustable-rate interest-only	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	21,054	'	23,841	'	'	'
Held by consolidated trusts | Single-family | Other Guarantee Transactions	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	7,366	'	8,431	'	'	'
Held by consolidated trusts | Single-family | FHA/VA and other governmental	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	3,191	'	3,354	'	'	'
Held by consolidated trusts | Multifamily	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	525	'	444	'	'	'
Allowance for loan losses on mortgage loans held-for-investment	0	0	0	0	0	-1
Held by consolidated trusts | Multifamily | Fixed-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	525	'	444	'	'	'
Held by consolidated trusts | Multifamily | Adjustable-rate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	0	'	0	'	'	'
Held by consolidated trusts | Multifamily | FHA/VA and other governmental	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivables [Line Items]	'	'	'	'	'	'
UPB of Mortgage Loans	$0	'	$0	'	'	'

Mortgage_Loans_and_Loan_Loss_R4

Mortgage Loans and Loan Loss Reserves - Recorded Investment of Held-For-Investment Mortgage Loans, by LTV Ratio (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	$1,705,826,000,000	$1,700,681,000,000
UPB for Single-family reduced interest rate provision	42,800,000,000	43,800,000,000
Single-family 20 and 30-year or more, amortizing fixed-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	1,242,707,000,000	1,213,110,000,000
Single-family 15-year amortizing fixed-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	285,498,000,000	295,617,000,000
Single-family Adjustable-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	66,685,000,000	64,500,000,000
Single-family Alt-A, interest-only, and option ARM	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	66,388,000,000	76,580,000,000
Single Family Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	1,661,278,000,000	1,649,807,000,000
Single-Family serious delinquency rate	1.96%	2.39%
Multifamily Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	44,548,000,000	50,874,000,000
Less Than Or Equal To 80 Estimated Current LTV Ratio | Single-family 20 and 30-year or more, amortizing fixed-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	890,035,000,000	819,509,000,000
Less Than Or Equal To 80 Estimated Current LTV Ratio | Single-family 15-year amortizing fixed-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	266,528,000,000	270,211,000,000
Less Than Or Equal To 80 Estimated Current LTV Ratio | Single-family Adjustable-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	59,173,000,000	56,208,000,000
Less Than Or Equal To 80 Estimated Current LTV Ratio | Single-family Alt-A, interest-only, and option ARM	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	29,261,000,000	29,927,000,000
Less Than Or Equal To 80 Estimated Current LTV Ratio | Single Family Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	1,244,997,000,000	1,175,855,000,000
Greater Than 80 Through 100 Estimated Current LTV Ratio | Single-family 20 and 30-year or more, amortizing fixed-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	258,552,000,000	269,110,000,000
Greater Than 80 Through 100 Estimated Current LTV Ratio | Single-family 15-year amortizing fixed-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	15,039,000,000	19,658,000,000
Greater Than 80 Through 100 Estimated Current LTV Ratio | Single-family Adjustable-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	6,641,000,000	6,714,000,000
Greater Than 80 Through 100 Estimated Current LTV Ratio | Single-family Alt-A, interest-only, and option ARM	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	18,985,000,000	21,564,000,000
Greater Than 80 Through 100 Estimated Current LTV Ratio | Single Family Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	299,217,000,000	317,046,000,000
Greater Than 100 Estimated Current LTV Ratio | Single-family 20 and 30-year or more, amortizing fixed-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	94,120,000,000	124,491,000,000
Greater Than 100 Estimated Current LTV Ratio | Single-family 15-year amortizing fixed-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	3,931,000,000	5,748,000,000
Greater Than 100 Estimated Current LTV Ratio | Single-family Adjustable-rate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	871,000,000	1,578,000,000
Greater Than 100 Estimated Current LTV Ratio | Single-family Alt-A, interest-only, and option ARM	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	18,142,000,000	25,089,000,000
Greater Than 100 Estimated Current LTV Ratio | Single Family Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded investment of held-for-investment mortgage loans	$117,064,000,000	$156,906,000,000
Single-Family serious delinquency rate	8.90%	9.90%

Mortgage_Loans_and_Loan_Loss_R5

Mortgage Loans and Loan Loss Reserves - Detail of Loan Loss Reserves (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Rollforward of Allowance for Loan Losses	'	'	'	'
Beginning balance	'	'	$24,618	'
Ending balance	22,574	'	22,574	'
Reserve For Guarantee Losses Rollforward	'	'	'	'
Beginning balance	116	143	111	183
Provision (benefit) for credit losses	-4	-14	4	-39
Charge-offs	-2	-2	-5	-7
Recoveries	0	0	0	0
Transfers, net	0	0	0	-10
Ending balance	110	127	110	127
Rollforward of Total loan loss reserves	'	'	'	'
Beginning balance	22,815	26,433	24,729	30,890
Provision (benefit) for credit losses	574	-1,138	41	-2,264
Charge-offs	-1,088	-2,301	-3,769	-7,296
Recoveries	191	1,730	1,101	2,917
Transfers, net	192	264	582	741
Ending balance	22,684	24,988	22,684	24,988
Losses on loans purchased and certain fair value losses excluded from charge offs	21	63	59	204
Reclassified reserves	'	'	'	'
Rollforward of Total loan loss reserves	'	'	'	'
Transfers, net	-100	800	600	2,900
Capitalization of past due interest on modified loans	'	'	'	'
Rollforward of Total loan loss reserves	'	'	'	'
Transfers, net	200	300	600	700
Single-family	'	'	'	'
Rollforward of Allowance for Loan Losses	'	'	'	'
Beginning balance	'	'	24,493	'
Ending balance	22,493	'	22,493	'
Reserve For Guarantee Losses Rollforward	'	'	'	'
Beginning balance	100	113	85	141
Provision (benefit) for credit losses	-5	-12	13	-32
Charge-offs	-2	-2	-5	-7
Recoveries	0	0	0	0
Transfers, net	0	0	0	-3
Ending balance	93	99	93	99
Rollforward of Total loan loss reserves	'	'	'	'
Beginning balance	22,708	26,197	24,578	30,508
Provision (benefit) for credit losses	584	-1,110	93	-2,097
Charge-offs	-1,088	-2,298	-3,767	-7,292
Recoveries	190	1,730	1,100	2,916
Transfers, net	192	264	582	748
Ending balance	22,586	24,783	22,586	24,783
Ratio of total loan loss reserves (excluding TDR concessions) to net charge-offs for single-family loans	3.1	1.9	'	'
Ratio of total loan loss reserves to net charge-offs for single-family loans	6.3	3.4	'	'
Multifamily	'	'	'	'
Rollforward of Allowance for Loan Losses	'	'	'	'
Beginning balance	'	'	125	'
Ending balance	81	'	81	'
Reserve For Guarantee Losses Rollforward	'	'	'	'
Beginning balance	16	30	26	42
Provision (benefit) for credit losses	1	-2	-9	-7
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Transfers, net	'	'	0	-7
Ending balance	17	28	17	28
Rollforward of Total loan loss reserves	'	'	'	'
Beginning balance	107	236	151	382
Provision (benefit) for credit losses	-10	-28	-52	-167
Charge-offs	0	-3	-2	-4
Recoveries	1	0	1	1
Transfers, net	'	'	0	-7
Ending balance	98	205	98	205
Unsecuritized	'	'	'	'
Rollforward of Allowance for Loan Losses	'	'	'	'
Beginning balance	20,047	23,068	21,612	25,788
Provision (benefit) for credit losses	200	-1,554	-708	-3,341
Charge-offs	-1,014	-1,920	-3,466	-6,598
Recoveries	185	1,470	849	2,598
Transfers, net	55	1,064	1,186	3,681
Ending balance	19,473	22,128	19,473	22,128
Unsecuritized | Single-family	'	'	'	'
Rollforward of Allowance for Loan Losses	'	'	'	'
Beginning balance	19,956	22,862	21,487	25,449
Provision (benefit) for credit losses	211	-1,528	-665	-3,182
Charge-offs	-1,014	-1,917	-3,464	-6,594
Recoveries	184	1,470	848	2,597
Transfers, net	55	1,064	1,186	3,681
Ending balance	19,392	21,951	19,392	21,951
Unsecuritized | Multifamily	'	'	'	'
Rollforward of Allowance for Loan Losses	'	'	'	'
Beginning balance	91	206	125	339
Provision (benefit) for credit losses	-11	-26	-43	-159
Charge-offs	0	-3	-2	-4
Recoveries	1	0	1	1
Transfers, net	'	'	0	0
Ending balance	81	177	81	177
Held by consolidated trusts	'	'	'	'
Rollforward of Allowance for Loan Losses	'	'	'	'
Beginning balance	2,652	3,222	3,006	4,919
Provision (benefit) for credit losses	378	430	745	1,116
Charge-offs	-72	-379	-298	-691
Recoveries	6	260	252	319
Transfers, net	137	-800	-604	-2,930
Ending balance	3,101	2,733	3,101	2,733
Held by consolidated trusts | Single-family	'	'	'	'
Rollforward of Allowance for Loan Losses	'	'	'	'
Beginning balance	2,652	3,222	3,006	4,918
Provision (benefit) for credit losses	378	430	745	1,117
Charge-offs	-72	-379	-298	-691
Recoveries	6	260	252	319
Transfers, net	137	-800	-604	-2,930
Ending balance	3,101	2,733	3,101	2,733
Held by consolidated trusts | Multifamily	'	'	'	'
Rollforward of Allowance for Loan Losses	'	'	'	'
Beginning balance	0	0	0	1
Provision (benefit) for credit losses	0	0	0	-1
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Transfers, net	'	'	0	0
Ending balance	$0	$0	$0	$0

Mortgage_Loans_and_Loan_Loss_R6

Mortgage Loans and Loan Loss Reserves - Net Investment in Mortgage Loans (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Recorded investment, collectively evaluated	$1,604,666	$1,601,265
Recorded investment, individually evaluated	101,160	99,416
Total recorded investment	1,705,826	1,700,681
Allowance for loan losses, collectively evaluated	-4,322	-5,984
Allowance for loan losses, individually evaluated	-18,252	-18,634
Total ending balance of the allowance	-22,574	-24,618
Net investment in mortgage loans	1,683,252	1,676,063
Single-family	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Recorded investment, collectively evaluated	1,561,107	1,551,667
Recorded investment, individually evaluated	100,171	98,140
Total recorded investment	1,661,278	1,649,807
Allowance for loan losses, collectively evaluated	-4,294	-5,939
Allowance for loan losses, individually evaluated	-18,199	-18,554
Total ending balance of the allowance	-22,493	-24,493
Net investment in mortgage loans	1,638,785	1,625,314
Multifamily	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Recorded investment, collectively evaluated	43,559	49,598
Recorded investment, individually evaluated	989	1,276
Total recorded investment	44,548	50,874
Allowance for loan losses, collectively evaluated	-28	-45
Allowance for loan losses, individually evaluated	-53	-80
Total ending balance of the allowance	-81	-125
Net investment in mortgage loans	$44,467	$50,749

Mortgage_Loans_and_Loan_Loss_R7

Mortgage Loans and Loan Loss Reserves - Recourse and Other Forms of Credit Protection (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Excluded credit protected mortgage loans UPB underlying Other Guarantee Transactions	$10,200,000,000	$11,500,000,000
Credit risk transfer transactions	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Excluded credit protected mortgage loans UPB also covered by primary mortgage insurance	42,000,000,000	'
Pool insurance	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Excluded credit protected mortgage loans UPB also covered by primary mortgage insurance	1,400,000,000	1,800,000,000
Single-family	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	368,644,000,000	278,908,000,000
Credit protected mortgage loans Maximum Coverage	72,369,000,000	63,678,000,000
Single-family | Primary mortgage insurance	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	220,471,000,000	203,470,000,000
Credit protected mortgage loans Maximum Coverage	55,941,000,000	50,823,000,000
Single-family | Credit risk transfer transactions	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	132,172,000,000	56,903,000,000
Credit protected mortgage loans Maximum Coverage	5,515,000,000	1,183,000,000
Single-family | Lender recourse and indemnification	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	6,693,000,000	7,119,000,000
Credit protected mortgage loans Maximum Coverage	6,235,000,000	6,726,000,000
Single-family | Pool insurance	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	3,380,000,000	4,683,000,000
Credit protected mortgage loans Maximum Coverage	988,000,000	1,186,000,000
Single-family | HFA indemnification	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	3,466,000,000	4,051,000,000
Credit protected mortgage loans Maximum Coverage	3,323,000,000	3,323,000,000
Single-family | Subordination	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	2,442,000,000	2,644,000,000
Credit protected mortgage loans Maximum Coverage	347,000,000	399,000,000
Single-family | Other credit enhancements	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	20,000,000	38,000,000
Credit protected mortgage loans Maximum Coverage	20,000,000	38,000,000
Multifamily	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	80,318,000,000	71,332,000,000
Credit protected mortgage loans Maximum Coverage	15,552,000,000	13,890,000,000
Multifamily | K Certificates	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	69,218,000,000	59,326,000,000
Credit protected mortgage loans Maximum Coverage	12,412,000,000	10,601,000,000
Multifamily | HFA indemnification	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	827,000,000	905,000,000
Credit protected mortgage loans Maximum Coverage	699,000,000	699,000,000
Multifamily | Subordination	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	4,418,000,000	4,435,000,000
Credit protected mortgage loans Maximum Coverage	756,000,000	756,000,000
Multifamily | Other credit enhancements	'	'
Recourse And Other Forms Of Credit Protection [Line Items]	'	'
Credit protected mortgage loans UPB	5,855,000,000	6,666,000,000
Credit protected mortgage loans Maximum Coverage	$1,685,000,000	$1,834,000,000

Impaired_Loans_Details

Impaired Loans (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Single-family	'	'	'	'
Impaired Loans [Line Items]	'	'	'	'
SF UPB not removed from Consolidated Trust for loans 120 days or more delinquent	$800,000,000	'	$800,000,000	'
SF UPB removed from Consolidated Trust	2,500,000,000	4,000,000,000	8,800,000,000	14,600,000,000
Interest rate reduction and term extension types, percentage of completed modifications	47.00%	'	53.00%	'
Principal forebearance and interest rate reductions and term extension types, percentage of completed modifications	22.00%	'	27.00%	'
Average term extension, number of months of completed modifications	'194 months	'	'180 months	'
Average interest rate reduction, percentage of completed modifications	1.10%	'	1.40%	'
Other loss mitigation activities	'	'	'	'
Impaired Loans [Line Items]	'	'	'	'
Number of Loans, Modifications, Subsequent Default	'	'	6,779	6,136
Post-TDR Recorded Investment, Modifications, Subsequent Default	'	'	1,000,000,000	1,000,000,000
Loans discharged from Chapter 7 bankruptcy	'	'	'	'
Impaired Loans [Line Items]	'	'	'	'
Number of Loans, Modifications, Subsequent Default	'	'	3,027	15,611
Post-TDR Recorded Investment, Modifications, Subsequent Default	'	'	$500,000,000	$2,600,000,000

Impaired_Loans_Individially_Im

Impaired Loans - Individially Impaired Loans (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Individually Impaired Mortgage Loans [Abstract]	'	'	'	'	'
UPB	$105,423	'	$105,423	'	$104,202
Recorded Investment	101,160	'	101,160	'	99,416
Associated Allowance	-18,252	'	-18,252	'	-18,634
Net Investment	82,908	'	82,908	'	80,782
Average Recorded Investment	100,652	95,224	100,205	93,746	'
Interest Income Recognized	845	759	2,492	2,332	'
Interest Income Recognized On Cash Basis	126	96	322	359	'
Single-family 20 and 30-year or more, amortizing fixed-rate	'	'	'	'	'
With no specific allowance recorded [Abstract]	'	'	'	'	'
UPB	6,051	'	6,051	'	5,927
Recorded Investment	3,932	'	3,932	'	3,355
Net Investment	3,932	'	3,932	'	3,355
Average Recorded Investment	3,941	3,430	3,618	3,346	'
Interest Income Recognized	105	100	277	304	'
Interest Income Recognized On Cash Basis	12	7	27	27	'
With specific allowance recorded [Abstract]	'	'	'	'	'
UPB	77,543	'	77,543	'	75,633
Recorded Investment	76,419	'	76,419	'	74,554
Net Investment	62,108	'	62,108	'	60,123
Average Recorded Investment	76,001	70,632	75,562	68,962	'
Interest Income Recognized	588	518	1,760	1,571	'
Interest Income Recognized On Cash Basis	82	63	213	218	'
Individually Impaired Mortgage Loans [Abstract]	'	'	'	'	'
UPB	83,594	'	83,594	'	81,560
Recorded Investment	80,351	'	80,351	'	77,909
Associated Allowance	-14,311	'	-14,311	'	-14,431
Net Investment	66,040	'	66,040	'	63,478
Average Recorded Investment	79,942	74,062	79,180	72,308	'
Interest Income Recognized	693	618	2,037	1,875	'
Interest Income Recognized On Cash Basis	94	70	240	245	'
Single-family 15-year amortizing fixed-rate	'	'	'	'	'
With no specific allowance recorded [Abstract]	'	'	'	'	'
UPB	66	'	66	'	62
Recorded Investment	45	'	45	'	34
Net Investment	45	'	45	'	34
Average Recorded Investment	45	32	37	30	'
Interest Income Recognized	3	1	7	5	'
Interest Income Recognized On Cash Basis	0	0	1	1	'
With specific allowance recorded [Abstract]	'	'	'	'	'
UPB	1,253	'	1,253	'	1,324
Recorded Investment	1,259	'	1,259	'	1,324
Net Investment	1,219	'	1,219	'	1,281
Average Recorded Investment	1,225	1,115	1,255	1,095	'
Interest Income Recognized	13	12	41	37	'
Interest Income Recognized On Cash Basis	3	3	7	8	'
Individually Impaired Mortgage Loans [Abstract]	'	'	'	'	'
UPB	1,319	'	1,319	'	1,386
Recorded Investment	1,304	'	1,304	'	1,358
Associated Allowance	-40	'	-40	'	-43
Net Investment	1,264	'	1,264	'	1,315
Average Recorded Investment	1,270	1,147	1,292	1,125	'
Interest Income Recognized	16	13	48	42	'
Interest Income Recognized On Cash Basis	3	3	8	9	'
Single-family Adjustable-rate	'	'	'	'	'
With no specific allowance recorded [Abstract]	'	'	'	'	'
UPB	29	'	29	'	19
Recorded Investment	22	'	22	'	13
Net Investment	22	'	22	'	13
Average Recorded Investment	22	14	15	13	'
Interest Income Recognized	0	0	1	1	'
Interest Income Recognized On Cash Basis	0	0	0	0	'
With specific allowance recorded [Abstract]	'	'	'	'	'
UPB	874	'	874	'	967
Recorded Investment	872	'	872	'	962
Net Investment	804	'	804	'	878
Average Recorded Investment	857	862	891	848	'
Interest Income Recognized	5	5	17	16	'
Interest Income Recognized On Cash Basis	2	1	4	4	'
Individually Impaired Mortgage Loans [Abstract]	'	'	'	'	'
UPB	903	'	903	'	986
Recorded Investment	894	'	894	'	975
Associated Allowance	-68	'	-68	'	-84
Net Investment	826	'	826	'	891
Average Recorded Investment	879	876	906	861	'
Interest Income Recognized	5	5	18	17	'
Interest Income Recognized On Cash Basis	2	1	4	4	'
Single-family Alt-A, interest-only, and option ARM	'	'	'	'	'
With no specific allowance recorded [Abstract]	'	'	'	'	'
UPB	1,718	'	1,718	'	1,758
Recorded Investment	1,149	'	1,149	'	1,038
Net Investment	1,149	'	1,149	'	1,038
Average Recorded Investment	1,151	1,016	1,119	957	'
Interest Income Recognized	22	18	60	53	'
Interest Income Recognized On Cash Basis	2	0	4	5	'
With specific allowance recorded [Abstract]	'	'	'	'	'
UPB	16,881	'	16,881	'	17,210
Recorded Investment	16,473	'	16,473	'	16,860
Net Investment	12,693	'	12,693	'	12,864
Average Recorded Investment	16,410	16,514	16,531	16,508	'
Interest Income Recognized	95	84	286	273	'
Interest Income Recognized On Cash Basis	19	10	46	53	'
Individually Impaired Mortgage Loans [Abstract]	'	'	'	'	'
UPB	18,599	'	18,599	'	18,968
Recorded Investment	17,622	'	17,622	'	17,898
Associated Allowance	-3,780	'	-3,780	'	-3,996
Net Investment	13,842	'	13,842	'	13,902
Average Recorded Investment	17,561	17,530	17,650	17,465	'
Interest Income Recognized	117	102	346	326	'
Interest Income Recognized On Cash Basis	21	10	50	58	'
Single-family	'	'	'	'	'
With no specific allowance recorded [Abstract]	'	'	'	'	'
UPB	7,864	'	7,864	'	7,766
Recorded Investment	5,148	'	5,148	'	4,440
Net Investment	5,148	'	5,148	'	4,440
Average Recorded Investment	5,159	4,492	4,789	4,346	'
Interest Income Recognized	130	119	345	363	'
Interest Income Recognized On Cash Basis	14	7	32	33	'
With specific allowance recorded [Abstract]	'	'	'	'	'
UPB	96,551	'	96,551	'	95,134
Recorded Investment	95,023	'	95,023	'	93,700
Net Investment	76,824	'	76,824	'	75,146
Average Recorded Investment	94,493	89,123	94,239	87,413	'
Interest Income Recognized	701	619	2,104	1,897	'
Interest Income Recognized On Cash Basis	106	77	270	283	'
Individually Impaired Mortgage Loans [Abstract]	'	'	'	'	'
UPB	104,415	'	104,415	'	102,900
Recorded Investment	100,171	'	100,171	'	98,140
Associated Allowance	-18,199	'	-18,199	'	-18,554
Net Investment	81,972	'	81,972	'	79,586
Average Recorded Investment	99,652	93,615	99,028	91,759	'
Interest Income Recognized	831	738	2,449	2,260	'
Interest Income Recognized On Cash Basis	120	84	302	316	'
Multifamily	'	'	'	'	'
With no specific allowance recorded [Abstract]	'	'	'	'	'
UPB	532	'	532	'	694
Recorded Investment	521	'	521	'	681
Net Investment	521	'	521	'	681
Average Recorded Investment	526	848	656	1,099	'
Interest Income Recognized	8	11	24	39	'
Interest Income Recognized On Cash Basis	2	4	7	16	'
With specific allowance recorded [Abstract]	'	'	'	'	'
UPB	476	'	476	'	608
Recorded Investment	468	'	468	'	595
Net Investment	415	'	415	'	515
Average Recorded Investment	474	761	521	888	'
Interest Income Recognized	6	10	19	33	'
Interest Income Recognized On Cash Basis	4	8	13	27	'
Individually Impaired Mortgage Loans [Abstract]	'	'	'	'	'
UPB	1,008	'	1,008	'	1,302
Recorded Investment	989	'	989	'	1,276
Associated Allowance	-53	'	-53	'	-80
Net Investment	936	'	936	'	1,196
Average Recorded Investment	1,000	1,609	1,177	1,987	'
Interest Income Recognized	14	21	43	72	'
Interest Income Recognized On Cash Basis	$6	$12	$20	$43	'

Impaired_Loans_Payment_Status_

Impaired Loans - Payment Status of Mortgage Loans (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	$1,643,713	$1,626,513
One Month Past Due	21,653	24,332
Two Months Past Due	7,283	8,271
Three Months or More Past Due, or in Foreclosure	33,177	41,565
Total recorded investment	1,705,826	1,700,681
Non-Accrual	33,572	42,143
Single-family 20 and 30-year or more, amortizing fixed-rate	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	1,194,713	1,157,057
One Month Past Due	17,839	19,743
Two Months Past Due	5,955	6,675
Three Months or More Past Due, or in Foreclosure	24,200	29,635
Total recorded investment	1,242,707	1,213,110
Non-Accrual	24,195	29,620
Single-family 15-year amortizing fixed-rate	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	283,527	293,286
One Month Past Due	1,021	1,196
Two Months Past Due	234	271
Three Months or More Past Due, or in Foreclosure	716	864
Total recorded investment	285,498	295,617
Non-Accrual	716	863
Single-family Adjustable-rate	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	65,472	62,987
One Month Past Due	426	495
Two Months Past Due	121	147
Three Months or More Past Due, or in Foreclosure	666	871
Total recorded investment	66,685	64,500
Non-Accrual	666	871
Single-family Alt-A, interest-only, and option ARM	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	55,466	62,356
One Month Past Due	2,367	2,898
Two Months Past Due	969	1,157
Three Months or More Past Due, or in Foreclosure	7,586	10,169
Total recorded investment	66,388	76,580
Non-Accrual	7,584	10,162
Single-family	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	1,599,178	1,575,686
One Month Past Due	21,653	24,332
Two Months Past Due	7,279	8,250
Three Months or More Past Due, or in Foreclosure	33,168	41,539
Total recorded investment	1,661,278	1,649,807
Non-Accrual	33,161	41,516
Multifamily	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	44,535	50,827
One Month Past Due	0	0
Two Months Past Due	4	21
Three Months or More Past Due, or in Foreclosure	9	26
Total recorded investment	44,548	50,874
Non-Accrual	$411	$627

Impaired_Loans_Delinquency_Rat

Impaired Loans - Delinquency Rates (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	numberofloans	numberofloans
Single-family	'	'
Delinquent Mortgage Loan Attributes [Line Items]	'	'
Serious delinquency rate	1.96%	2.39%
Total number of seriously delinquent loans	207,862	255,325
Single-family | Non-credit-enhanced portfolio	'	'
Delinquent Mortgage Loan Attributes [Line Items]	'	'
Serious delinquency rate	1.80%	2.09%
Total number of seriously delinquent loans	155,955	190,119
Single-family | Credit-enhanced portfolio | Primary mortgage insurance	'	'
Delinquent Mortgage Loan Attributes [Line Items]	'	'
Serious delinquency rate	2.84%	4.40%
Total number of seriously delinquent loans	40,003	51,600
Single-family | Credit-enhanced portfolio | Other credit protection	'	'
Delinquent Mortgage Loan Attributes [Line Items]	'	'
Serious delinquency rate	1.41%	3.66%
Total number of seriously delinquent loans	13,064	15,828
Multifamily	'	'
Delinquent Mortgage Loan Attributes [Line Items]	'	'
Delinquency Rate	0.03%	0.09%
UPB of delinquent loans	39	121
Multifamily | Non-credit-enhanced portfolio	'	'
Delinquent Mortgage Loan Attributes [Line Items]	'	'
Delinquency Rate	0.02%	0.07%
UPB of delinquent loans	13	46
Multifamily | Credit-enhanced portfolio	'	'
Delinquent Mortgage Loan Attributes [Line Items]	'	'
Delinquency Rate	0.03%	0.11%
UPB of delinquent loans	26	75

Impaired_Loans_TDR_Activity_By

Impaired Loans - TDR Activity, By Segment (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
	numberofloans	numberofloans	numberofloans	numberofloans
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	21,592	32,362	66,177	91,741
Post TDR Recorded Investments	$3,136,000,000	$5,171,000,000	$9,946,000,000	$15,075,000,000
Single-family 20 and 30-year or more, amortizing fixed-rate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	17,194	25,289	52,356	69,681
Post TDR Recorded Investments	2,518,000,000	3,916,000,000	7,863,000,000	11,149,000,000
Single-family 15-year amortizing fixed-rate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	1,931	2,020	5,278	6,617
Post TDR Recorded Investments	139,000,000	156,000,000	394,000,000	486,000,000
Single-family Adjustable-rate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	397	694	1,336	2,372
Post TDR Recorded Investments	61,000,000	122,000,000	207,000,000	382,000,000
Single-family Alt-A, interest-only, and option ARM	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	2,070	4,356	7,206	13,063
Post TDR Recorded Investments	418,000,000	952,000,000	1,472,000,000	2,960,000,000
Single-family	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	21,592	32,359	66,176	91,733
Post TDR Recorded Investments	3,136,000,000	5,146,000,000	9,936,000,000	14,977,000,000
Pre-TDR Recorded Investments	3,100,000,000	5,100,000,000	9,900,000,000	14,900,000,000
Multifamily	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	3	1	8
Post TDR Recorded Investments	$0	$25,000,000	$10,000,000	$98,000,000

Impaired_Loans_Payment_Default

Impaired Loans - Payment Defaults of Completed TDR Modifications, by Segment (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
	numberofloans	numberofloans	numberofloans	numberofloans
Single-family 20 and 30-year or more, amortizing fixed-rate	'	'	'	'
Financing Receivable, Modifications and Other Loss Mitigation Activities	'	'	'	'
Number of Loans, Modifications, Subsequent Default	5,190	3,943	13,814	10,726
Post-TDR Recorded Investment, Modifications, Subsequent Default	$922	$726	$2,483	$1,989
Single-family 15-year amortizing fixed-rate	'	'	'	'
Financing Receivable, Modifications and Other Loss Mitigation Activities	'	'	'	'
Number of Loans, Modifications, Subsequent Default	170	106	461	323
Post-TDR Recorded Investment, Modifications, Subsequent Default	16	12	45	36
Single-family Adjustable-rate	'	'	'	'
Financing Receivable, Modifications and Other Loss Mitigation Activities	'	'	'	'
Number of Loans, Modifications, Subsequent Default	88	64	250	167
Post-TDR Recorded Investment, Modifications, Subsequent Default	15	14	46	34
Single-family Alt-A, interest-only, and option ARM	'	'	'	'
Financing Receivable, Modifications and Other Loss Mitigation Activities	'	'	'	'
Number of Loans, Modifications, Subsequent Default	604	590	1,778	1,652
Post-TDR Recorded Investment, Modifications, Subsequent Default	138	155	428	437
Single-family	'	'	'	'
Financing Receivable, Modifications and Other Loss Mitigation Activities	'	'	'	'
Number of Loans, Modifications, Subsequent Default	6,052	4,703	16,303	12,868
Post-TDR Recorded Investment, Modifications, Subsequent Default	1,091	907	3,002	2,496
Multifamily	'	'	'	'
Financing Receivable, Modifications and Other Loss Mitigation Activities	'	'	'	'
Number of Loans, Modifications, Subsequent Default	0	0	0	0
Post-TDR Recorded Investment, Modifications, Subsequent Default	$0	$0	$0	$0

Real_Estate_Owned_Details

Real Estate Owned (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Real Estate Acquired Through Foreclosure Data [Line Items]	'	'	'	'	'
Real estate owned, net	$2,911,000,000	$4,368,000,000	$2,911,000,000	$4,368,000,000	$4,551,000,000
Gain (Loss) on disposition of REO, net	132,000,000	212,000,000	415,000,000	608,000,000	'
Increase (Decrease) in REO valuation allowance, inventory	111,000,000	-5,000,000	110,000,000	12,000,000	'
REO acquired in non-cash transfer	'	'	3,100,000,000	4,500,000,000	'
Single Family	'	'	'	'	'
Real Estate Acquired Through Foreclosure Data [Line Items]	'	'	'	'	'
Real estate owned, net	2,900,000,000	'	2,900,000,000	'	4,500,000,000
REO, number of properties	29,344	'	29,344	'	47,307
Single Family | Southeast	'	'	'	'	'
Real Estate Acquired Through Foreclosure Data [Line Items]	'	'	'	'	'
Single-Family REO, percentage of additions	35.00%	34.00%	'	'	'
Single Family | North Central	'	'	'	'	'
Real Estate Acquired Through Foreclosure Data [Line Items]	'	'	'	'	'
Single-Family REO, percentage of additions	26.00%	28.00%	'	'	'
Multifamily	'	'	'	'	'
Real Estate Acquired Through Foreclosure Data [Line Items]	'	'	'	'	'
Real estate owned, net	$0	'	$0	'	$10,000,000

Real_Estate_Owned_REO_Details

Real Estate Owned - REO (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
REO	'	'	'	'	'
Beginning balance - REO	$3,696	$4,073	$4,602	$4,407	'
Additions	815	1,832	3,293	4,820	'
Dispositions	-1,475	-1,523	-4,859	-4,845	'
Ending balance - REO	3,036	4,382	3,036	4,382	'
REO, valuation allowance	'	'	'	'	'
Beginning balance, valuation allowance	-19	-22	-51	-29	'
Change in valuation allowance	-106	8	-74	15	'
Ending balance, valuation allowance	-125	-14	-125	-14	'
Ending Balance - REO, net	$2,911	$4,368	$2,911	$4,368	$4,551

Investments_in_Securities_Deta

Investments in Securities (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
	numberoflots		numberoflots
	numberofsecurities		numberofsecurities
Investments, Debt and Equity Securities [Abstract]	'	'	'	'
Total Gross Unrealized Losses	$1,300,000,000	'	$1,300,000,000	'
Individual lots in gross unrealized loss position	458	'	458	'
Separate securities in gross unrealized loss position	426	'	426	'
Net unrealized gains (losses) on trading securities held at balance sheets date	($142,000,000)	($200,000,000)	($141,000,000)	($1,300,000,000)

Investments_in_Securities_Avai

Investments in Securities - Available-For-Sale Securities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	$108,894	$127,439
Gross Unrealized Gains	5,217	5,379
Available-for-sale, at fair value	112,777	128,919
Freddie Mac	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	40,070	39,001
Gross Unrealized Gains	1,376	1,847
Available-for-sale, at fair value	41,363	40,659
Fannie Mae	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	9,845	10,140
Gross Unrealized Gains	686	660
Available-for-sale, at fair value	10,526	10,797
Ginnie Mae	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	194	149
Gross Unrealized Gains	17	18
Available-for-sale, at fair value	210	167
CMBS	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	22,735	29,151
Gross Unrealized Gains	982	1,524
Available-for-sale, at fair value	23,614	30,338
Subprime	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	22,543	29,897
Gross Unrealized Gains	1,038	382
Available-for-sale, at fair value	22,701	27,499
Option ARM	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	5,575	6,617
Gross Unrealized Gains	355	338
Available-for-sale, at fair value	5,707	6,574
Alt-A and other	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	4,897	8,322
Gross Unrealized Gains	649	526
Available-for-sale, at fair value	5,513	8,706
Obligations of states and political subdivisions	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	2,461	3,533
Gross Unrealized Gains	35	23
Available-for-sale, at fair value	2,493	3,495
Manufactured housing	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	574	629
Gross Unrealized Gains	79	61
Available-for-sale, at fair value	650	684
Other-than-temporary impairment	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-1,030	-2,995
Other-than-temporary impairment | Freddie Mac	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	0	0
Other-than-temporary impairment | Fannie Mae	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	0	0
Other-than-temporary impairment | Ginnie Mae	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	0	0
Other-than-temporary impairment | CMBS	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-3	-23
Other-than-temporary impairment | Subprime	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-780	-2,467
Other-than-temporary impairment | Option ARM	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-219	-376
Other-than-temporary impairment | Alt-A and other	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-26	-118
Other-than-temporary impairment | Obligations of states and political subdivisions	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	0	-7
Other-than-temporary impairment | Manufactured housing	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-2	-4
Temporary impairment	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-304	-904
Temporary impairment | Freddie Mac	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-83	-189
Temporary impairment | Fannie Mae	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-5	-3
Temporary impairment | Ginnie Mae	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-1	0
Temporary impairment | CMBS	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-100	-314
Temporary impairment | Subprime	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-100	-313
Temporary impairment | Option ARM	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-4	-5
Temporary impairment | Alt-A and other	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-7	-24
Temporary impairment | Obligations of states and political subdivisions	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	-3	-54
Temporary impairment | Manufactured housing	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Unrealized Losses	($1)	($2)

Investments_in_Securities_Avai1

Investments in Securities - Available-For-Sale Securities in a Gross Unrealized Loss Position (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months Fair Value	$8,302	$12,048
12 Months or Greater Fair Value	14,278	26,314
Less than 12 Months Gross Unrealized Losses	-69	-313
12 Months or Greater Gross Unrealized Losses	-1,265	-3,586
Freddie Mac	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months Fair Value	5,838	7,957
12 Months or Greater Fair Value	1,163	649
Less than 12 Months Gross Unrealized Losses	-36	-144
12 Months or Greater Gross Unrealized Losses	-47	-45
Fannie Mae	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months Fair Value	467	248
12 Months or Greater Fair Value	48	19
Less than 12 Months Gross Unrealized Losses	-3	-2
12 Months or Greater Gross Unrealized Losses	-2	-1
Ginnie Mae	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months Fair Value	69	'
12 Months or Greater Fair Value	0	'
Less than 12 Months Gross Unrealized Losses	-1	'
12 Months or Greater Gross Unrealized Losses	0	'
CMBS	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months Fair Value	582	1,147
12 Months or Greater Fair Value	1,643	1,992
Less than 12 Months Gross Unrealized Losses	-12	-85
12 Months or Greater Gross Unrealized Losses	-91	-252
Subprime	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months Fair Value	606	472
12 Months or Greater Fair Value	8,852	19,103
Less than 12 Months Gross Unrealized Losses	-9	-19
12 Months or Greater Gross Unrealized Losses	-871	-2,761
Option ARM	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months Fair Value	513	77
12 Months or Greater Fair Value	1,790	2,608
Less than 12 Months Gross Unrealized Losses	-4	-2
12 Months or Greater Gross Unrealized Losses	-219	-379
Alt-A and other	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months Fair Value	204	262
12 Months or Greater Fair Value	562	1,854
Less than 12 Months Gross Unrealized Losses	-4	-5
12 Months or Greater Gross Unrealized Losses	-29	-137
Obligations of states and political subdivisions	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months Fair Value	5	1,885
12 Months or Greater Fair Value	188	24
Less than 12 Months Gross Unrealized Losses	0	-56
12 Months or Greater Gross Unrealized Losses	-3	-5
Manufactured housing	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months Fair Value	18	0
12 Months or Greater Fair Value	32	65
Less than 12 Months Gross Unrealized Losses	0	0
12 Months or Greater Gross Unrealized Losses	($3)	($6)

Investments_in_Securities_Sign

Investments in Securities - Significant Modeled Attributes for Certain Available-For-Sale Non-Agency Mortgage-Related Securities (Details) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Subprime	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	$30,706
Weighted average collateral defaults	49.00%
Weighted average collateral severities	59.00%
Weighted average voluntary prepayment rates	3.00%
Average credit enhancement	9.00%
Option ARM	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	8,493
Weighted average collateral defaults	36.00%
Weighted average collateral severities	48.00%
Weighted average voluntary prepayment rates	7.00%
Average credit enhancement	0.00%
Alt-A Fixed Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	1,327
Weighted average collateral defaults	21.00%
Weighted average collateral severities	46.00%
Weighted average voluntary prepayment rates	10.00%
Average credit enhancement	3.00%
Alt-A Variable Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	1,551
Weighted average collateral defaults	39.00%
Weighted average collateral severities	49.00%
Weighted average voluntary prepayment rates	7.00%
Average credit enhancement	1.00%
Alt-A Hybrid Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	2,117
Weighted average collateral defaults	26.00%
Weighted average collateral severities	41.00%
Weighted average voluntary prepayment rates	10.00%
Average credit enhancement	2.00%
2004 and prior | Subprime	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	563
Weighted average collateral defaults	34.00%
Weighted average collateral severities	57.00%
Weighted average voluntary prepayment rates	7.00%
Average credit enhancement	30.00%
2004 and prior | Option ARM	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	40
Weighted average collateral defaults	21.00%
Weighted average collateral severities	45.00%
Weighted average voluntary prepayment rates	9.00%
Average credit enhancement	0.00%
2004 and prior | Alt-A Fixed Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	363
Weighted average collateral defaults	13.00%
Weighted average collateral severities	46.00%
Weighted average voluntary prepayment rates	12.00%
Average credit enhancement	14.00%
2004 and prior | Alt-A Variable Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	266
Weighted average collateral defaults	30.00%
Weighted average collateral severities	43.00%
Weighted average voluntary prepayment rates	8.00%
Average credit enhancement	11.00%
2004 and prior | Alt-A Hybrid Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	195
Weighted average collateral defaults	17.00%
Weighted average collateral severities	39.00%
Weighted average voluntary prepayment rates	9.00%
Average credit enhancement	13.00%
2005 | Subprime	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	2,839
Weighted average collateral defaults	44.00%
Weighted average collateral severities	59.00%
Weighted average voluntary prepayment rates	4.00%
Average credit enhancement	48.00%
2005 | Option ARM	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	1,786
Weighted average collateral defaults	29.00%
Weighted average collateral severities	48.00%
Weighted average voluntary prepayment rates	8.00%
Average credit enhancement	1.00%
2005 | Alt-A Fixed Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	535
Weighted average collateral defaults	18.00%
Weighted average collateral severities	45.00%
Weighted average voluntary prepayment rates	11.00%
Average credit enhancement	-1.00%
2005 | Alt-A Variable Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	386
Weighted average collateral defaults	39.00%
Weighted average collateral severities	51.00%
Weighted average voluntary prepayment rates	7.00%
Average credit enhancement	17.00%
2005 | Alt-A Hybrid Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	1,283
Weighted average collateral defaults	24.00%
Weighted average collateral severities	41.00%
Weighted average voluntary prepayment rates	10.00%
Average credit enhancement	2.00%
2006 | Subprime	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	12,785
Weighted average collateral defaults	50.00%
Weighted average collateral severities	59.00%
Weighted average voluntary prepayment rates	3.00%
Average credit enhancement	7.00%
2006 | Option ARM	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	4,158
Weighted average collateral defaults	38.00%
Weighted average collateral severities	49.00%
Weighted average voluntary prepayment rates	7.00%
Average credit enhancement	-3.00%
2006 | Alt-A Fixed Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	308
Weighted average collateral defaults	26.00%
Weighted average collateral severities	45.00%
Weighted average voluntary prepayment rates	9.00%
Average credit enhancement	-2.00%
2006 | Alt-A Variable Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	432
Weighted average collateral defaults	42.00%
Weighted average collateral severities	49.00%
Weighted average voluntary prepayment rates	7.00%
Average credit enhancement	1.00%
2006 | Alt-A Hybrid Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	431
Weighted average collateral defaults	33.00%
Weighted average collateral severities	41.00%
Weighted average voluntary prepayment rates	9.00%
Average credit enhancement	-4.00%
2007 | Subprime	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	14,519
Weighted average collateral defaults	50.00%
Weighted average collateral severities	59.00%
Weighted average voluntary prepayment rates	2.00%
Average credit enhancement	3.00%
2007 | Option ARM	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	2,509
Weighted average collateral defaults	37.00%
Weighted average collateral severities	48.00%
Weighted average voluntary prepayment rates	7.00%
Average credit enhancement	3.00%
2007 | Alt-A Fixed Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	121
Weighted average collateral defaults	41.00%
Weighted average collateral severities	52.00%
Weighted average voluntary prepayment rates	7.00%
Average credit enhancement	-1.00%
2007 | Alt-A Variable Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	467
Weighted average collateral defaults	41.00%
Weighted average collateral severities	50.00%
Weighted average voluntary prepayment rates	7.00%
Average credit enhancement	-18.00%
2007 | Alt-A Hybrid Rate	'
Schedule of Available-for-sale Securities [Line Items]	'
UPB	$208
Weighted average collateral defaults	37.00%
Weighted average collateral severities	46.00%
Weighted average voluntary prepayment rates	8.00%
Average credit enhancement	0.00%

Investments_in_Securities_Net_

Investments in Securities - Net Impairment of Available-For-Sale Securities Recognized in Earnings (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Net impairment of available-for-sale securities recognized in earnings	($166)	($126)	($687)	($213)
Net impairment charge in earnings due to change from intent to keep to sell	132	118	598	134
CMBS	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Net impairment of available-for-sale securities recognized in earnings	0	-3	0	-13
Subprime	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Net impairment of available-for-sale securities recognized in earnings	-125	-45	-582	-91
Option ARM	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Net impairment of available-for-sale securities recognized in earnings	-39	-12	-72	-17
Alt-A and other	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Net impairment of available-for-sale securities recognized in earnings	-2	-66	-33	-91
Manufactured housing	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Net impairment of available-for-sale securities recognized in earnings	$0	$0	$0	($1)

Investments_in_Securities_Othe

Investments in Securities - Other-Than-Temporary Impairments Related to Credit Losses on Available-For-Sale Securities (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Credit-related other-than-temporary impairments on available-for-sale securities recognized in earnings:	'	'	'	'
Beginning balance - remaining credit losses on available-for-sale securities where other-than-temporary impairments were recognized in earnings	$11,118	$15,772	$14,463	$16,745
Amounts related to credit losses for which an other-than-temporary impairment was not previously recognized	0	4	0	20
Amounts related to credit losses for which an other-than-temporary impairment was previously recognized	34	4	89	59
Amounts related to securities which were sold, written off or matured	-807	-261	-1,141	-1,066
Amounts for which we intend to sell the security or it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis	-1,949	-182	-4,736	-291
Amounts related to amortization resulting from significant increases in cash flows expected to be collected and/or due to the passage of time that are recognized over the remaining life of the security	-110	-137	-389	-267
Ending balance - remaining credit losses on available-for-sale securities where other-than-temporary impairments were recognized in earnings	$8,286	$15,200	$8,286	$15,200

Investments_in_Securities_Gros

Investments in Securities - Gross Realized Gains and Gross Realized Losses on Sales of Available-For-Sale Securities (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Gross realized gains	$273	$869	$1,394	$1,226
Gross realized losses	-166	-42	-182	-44
Net realized gains (losses)	107	827	1,212	1,182
Mortage-related securities	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Gross realized gains	273	869	1,394	1,226
Gross realized losses	-166	-42	-182	-44
Freddie Mac	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Gross realized gains	81	172	745	248
Gross realized losses	-9	-19	-11	-19
Fannie Mae	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Gross realized gains	11	1	52	17
CMBS	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Gross realized gains	11	685	151	892
Option ARM	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Gross realized gains	58	0	62	0
Gross realized losses	-24	-4	-24	-4
Alt-A and other	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Gross realized gains	38	10	242	56
Gross realized losses	-5	-18	-6	-18
Obligations of states and political subdivisions	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Gross realized gains	0	1	1	13
Subprime	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Gross realized gains	74	0	141	0
Gross realized losses	($128)	($1)	($141)	($3)

Investments_in_Securities_Matu

Investments in Securities - Maturities of Available-For-Sale Securities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Amortized Cost	'	'
Due within 1 year or less	$3	'
Due after 1 through 5 years	908	'
Due after 5 through 10 years	805	'
Due after 10 years	107,178	'
Amortized Cost	108,894	'
Fair Value	'	'
Due within 1 year or less	3	'
Due after 1 through 5 years	946	'
Due after 5 through 10 years	858	'
Due after 10 years	110,970	'
Fair Value	112,777	128,919
Freddie Mac	'	'
Amortized Cost	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	428	'
Due after 5 through 10 years	585	'
Due after 10 years	39,057	'
Amortized Cost	40,070	'
Fair Value	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	443	'
Due after 5 through 10 years	619	'
Due after 10 years	40,301	'
Fair Value	41,363	40,659
Fannie Mae	'	'
Amortized Cost	'	'
Due within 1 year or less	1	'
Due after 1 through 5 years	73	'
Due after 5 through 10 years	117	'
Due after 10 years	9,654	'
Amortized Cost	9,845	'
Fair Value	'	'
Due within 1 year or less	1	'
Due after 1 through 5 years	77	'
Due after 5 through 10 years	129	'
Due after 10 years	10,319	'
Fair Value	10,526	10,797
Ginnie Mae	'	'
Amortized Cost	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	5	'
Due after 5 through 10 years	23	'
Due after 10 years	166	'
Amortized Cost	194	'
Fair Value	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	5	'
Due after 5 through 10 years	27	'
Due after 10 years	178	'
Fair Value	210	167
CMBS	'	'
Amortized Cost	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	316	'
Due after 5 through 10 years	8	'
Due after 10 years	22,411	'
Amortized Cost	22,735	'
Fair Value	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	332	'
Due after 5 through 10 years	8	'
Due after 10 years	23,274	'
Fair Value	23,614	30,338
Subprime	'	'
Amortized Cost	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	0	'
Due after 5 through 10 years	0	'
Due after 10 years	22,543	'
Amortized Cost	22,543	'
Fair Value	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	0	'
Due after 5 through 10 years	0	'
Due after 10 years	22,701	'
Fair Value	22,701	27,499
Option ARM	'	'
Amortized Cost	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	0	'
Due after 5 through 10 years	0	'
Due after 10 years	5,575	'
Amortized Cost	5,575	'
Fair Value	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	0	'
Due after 5 through 10 years	0	'
Due after 10 years	5,707	'
Fair Value	5,707	6,574
Alt-A and other	'	'
Amortized Cost	'	'
Due within 1 year or less	2	'
Due after 1 through 5 years	46	'
Due after 5 through 10 years	3	'
Due after 10 years	4,846	'
Amortized Cost	4,897	'
Fair Value	'	'
Due within 1 year or less	2	'
Due after 1 through 5 years	47	'
Due after 5 through 10 years	3	'
Due after 10 years	5,461	'
Fair Value	5,513	8,706
Obligations of states and political subdivisions	'	'
Amortized Cost	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	40	'
Due after 5 through 10 years	60	'
Due after 10 years	2,361	'
Amortized Cost	2,461	'
Fair Value	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	42	'
Due after 5 through 10 years	60	'
Due after 10 years	2,391	'
Fair Value	2,493	3,495
Manufactured housing	'	'
Amortized Cost	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	0	'
Due after 5 through 10 years	9	'
Due after 10 years	565	'
Amortized Cost	574	'
Fair Value	'	'
Due within 1 year or less	0	'
Due after 1 through 5 years	0	'
Due after 5 through 10 years	12	'
Due after 10 years	638	'
Fair Value	$650	$684

Investments_in_Securities_Trad

Investments in Securities - Trading Securities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Trading Securities [Line Items]	'	'
Total fair value of trading securities	$30,434	$23,404
Mortage-related securities	'	'
Trading Securities [Line Items]	'	'
Total fair value of trading securities	21,275	16,768
Freddie Mac	'	'
Trading Securities [Line Items]	'	'
Total fair value of trading securities	14,900	9,349
Fannie Mae	'	'
Trading Securities [Line Items]	'	'
Total fair value of trading securities	6,238	7,180
Ginnie Mae	'	'
Trading Securities [Line Items]	'	'
Total fair value of trading securities	17	98
Other	'	'
Trading Securities [Line Items]	'	'
Total fair value of trading securities	120	141
U.S. Treasury securities	'	'
Trading Securities [Line Items]	'	'
Total fair value of trading securities	$9,159	$6,636

Debt_Securities_and_Subordinat2

Debt Securities and Subordinated Borrowings (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]	'	'
Debt limit as percentage of mortgage assets	120.00%	'
Debt cap under Purchase Agreement for the current year	$663,000,000,000	'
Debt cap under Purchase Agreement for the following year	563,600,000,000	'
Aggregate indebtedness as the par value of other debt	439,500,000,000	'
Federal funds purchased and securities sold under agreements to repurchase	$0	$0

Debt_Securities_and_Subordinat3

Debt Securities and Subordinated Borrowings - Other Debt (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Long-term Debt [Abstract]	'	'
Total par value	$439,500,000,000	'
Total balance, net	1,903,551,000,000	1,940,751,000,000
Long-term Debt, Fair Value	4,988,000,000	2,683,000,000
Balance, net for callable other long-term debt	106,200,000,000	107,500,000,000
Freddie Mac parent	'	'
Short-term Debt [Abstract]	'	'
Par Value	111,857,000,000	141,767,000,000
Balance, Net	111,817,000,000	141,712,000,000
Weighted Average Effective Rate	0.12%	0.13%
Long-term Debt [Abstract]	'	'
Par Value	327,677,000,000	369,578,000,000
Balance, Net	323,889,000,000	365,055,000,000
Weighted Average Effective Rate	2.02%	2.08%
Total par value	439,534,000,000	511,345,000,000
Total balance, net	435,706,000,000	506,767,000,000
Freddie Mac parent | 2014	'	'
Long-term Debt [Abstract]	'	'
Par Value	19,239,000,000	78,115,000,000
Balance, Net	19,226,000,000	78,041,000,000
Weighted Average Effective Rate	1.41%	1.91%
Freddie Mac parent | 2015	'	'
Long-term Debt [Abstract]	'	'
Par Value	58,778,000,000	70,303,000,000
Balance, Net	58,764,000,000	70,284,000,000
Weighted Average Effective Rate	1.62%	1.44%
Freddie Mac parent | 2016	'	'
Long-term Debt [Abstract]	'	'
Par Value	66,933,000,000	63,564,000,000
Balance, Net	67,142,000,000	63,669,000,000
Weighted Average Effective Rate	2.03%	2.19%
Freddie Mac parent | 2017	'	'
Long-term Debt [Abstract]	'	'
Par Value	72,122,000,000	51,908,000,000
Balance, Net	72,118,000,000	51,885,000,000
Weighted Average Effective Rate	1.82%	2.14%
Freddie Mac parent | 2018	'	'
Long-term Debt [Abstract]	'	'
Par Value	31,692,000,000	33,418,000,000
Balance, Net	31,652,000,000	33,372,000,000
Weighted Average Effective Rate	1.70%	1.74%
Freddie Mac parent | Thereafter	'	'
Long-term Debt [Abstract]	'	'
Par Value	78,913,000,000	72,270,000,000
Balance, Net	74,987,000,000	67,804,000,000
Weighted Average Effective Rate	2.83%	2.93%
Freddie Mac parent | Reference Bills securites and discount notes	'	'
Short-term Debt [Abstract]	'	'
Par Value	111,857,000,000	137,767,000,000
Balance, Net	111,817,000,000	137,712,000,000
Weighted Average Effective Rate	0.12%	0.13%
Freddie Mac parent | Medium-term notes	'	'
Short-term Debt [Abstract]	'	'
Par Value	0	4,000,000,000
Balance, Net	$0	$4,000,000,000
Weighted Average Effective Rate	0.00%	0.16%

Debt_Securities_and_Subordinat4

Debt Securities and Subordinated Borrowings - Debt Securities of Consolidated Trusts Held by Third Parties (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Debt Securities Of Consolidated Trusts Held By Third Parties [Line Items]	'	'
Balance, Net	$1,903,551	$1,940,751
Variable Interest Entity Primary Beneficiary	'	'
Debt Securities Of Consolidated Trusts Held By Third Parties [Line Items]	'	'
UPB	1,430,114	1,399,456
Balance, Net	1,467,845	1,433,984
Effective rate for debt securities of consolidated trusts held by third parties	3.21%	3.39%
Variable Interest Entity Primary Beneficiary | Single-family	'	'
Debt Securities Of Consolidated Trusts Held By Third Parties [Line Items]	'	'
UPB	1,429,589	1,399,012
Balance, Net	1,467,262	1,433,476
Variable Interest Entity Primary Beneficiary | Multifamily	'	'
Debt Securities Of Consolidated Trusts Held By Third Parties [Line Items]	'	'
UPB	525	444
Balance, Net	583	508
Weighted Average Coupon	4.77%	4.96%
Variable Interest Entity Primary Beneficiary | Single-family 30-year or more, fixed-rate | Single-family	'	'
Debt Securities Of Consolidated Trusts Held By Third Parties [Line Items]	'	'
UPB	1,004,733	969,270
Balance, Net	1,032,252	993,683
Weighted Average Coupon	4.07%	4.14%
Variable Interest Entity Primary Beneficiary | Single-family 20-year fixed-rate | Single-family	'	'
Debt Securities Of Consolidated Trusts Held By Third Parties [Line Items]	'	'
UPB	72,710	75,910
Balance, Net	74,974	78,252
Weighted Average Coupon	3.77%	3.81%
Variable Interest Entity Primary Beneficiary | Single-family 15-year fixed-rate | Single-family	'	'
Debt Securities Of Consolidated Trusts Held By Third Parties [Line Items]	'	'
UPB	268,564	270,513
Balance, Net	275,018	277,018
Weighted Average Coupon	3.15%	3.23%
Variable Interest Entity Primary Beneficiary | Single-family Adjustable-rate | Single-family	'	'
Debt Securities Of Consolidated Trusts Held By Third Parties [Line Items]	'	'
UPB	64,058	60,683
Balance, Net	65,421	61,830
Weighted Average Coupon	2.63%	2.64%
Variable Interest Entity Primary Beneficiary | Single-family Interest-only | Single-family	'	'
Debt Securities Of Consolidated Trusts Held By Third Parties [Line Items]	'	'
UPB	18,243	21,352
Balance, Net	18,290	21,390
Weighted Average Coupon	3.36%	3.70%
Variable Interest Entity Primary Beneficiary | FHA/VA | Single-family	'	'
Debt Securities Of Consolidated Trusts Held By Third Parties [Line Items]	'	'
UPB	1,281	1,284
Balance, Net	$1,307	$1,303
Weighted Average Coupon	5.44%	5.67%

Derivatives_Details

Derivatives (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
			category
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'	'	'	'	'
Number of derivative categories	'	'	3	'	'
Derivatives in Hedge Accounting Relationships	$0	'	$0	'	$0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	($76,000,000)	($110,000,000)	($232,000,000)	($365,000,000)	'

Derivatives_Derivative_Assets_

Derivatives - Derivative Assets and Liabilities at Fair Value (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Derivative [Line Items]	'	'
Netting adjustments to derivative assets	($8,973)	($14,411)
Derivative assets, net	897	1,063
Netting adjustments to derivative liabilities	10,014	15,282
Derivative liabilities, net	-1,930	-180
Net cash collateral posted	1,000	871
Commitments	'	'
Derivative [Line Items]	'	'
Derivative assets at fair value	88	61
Derivatives	'	'
Derivative [Line Items]	'	'
Net cash collateral posted	1,000	871
Not Designated as Hedging Instrument	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	632,868	725,026
Derivative assets at fair value	9,067	14,231
Derivative interest receivable	803	1,243
Netting adjustments to derivative assets	-8,973	-14,411
Derivative assets, net	897	1,063
Derivative liabilities at fair value	-10,431	-13,627
Derivative interest payable	-1,513	-1,835
Netting adjustments to derivative liabilities	10,014	15,282
Derivative liabilities, net	-1,930	-180
Not Designated as Hedging Instrument | Interest Rate Swaps	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	435,796	524,624
Derivative assets at fair value	5,910	10,019
Derivative liabilities at fair value	-10,259	-13,317
Not Designated as Hedging Instrument | Receive-fixed	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	219,773	281,727
Derivative assets at fair value	4,145	4,475
Derivative liabilities at fair value	-823	-2,438
Not Designated as Hedging Instrument | Pay-fixed	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	215,723	242,597
Derivative assets at fair value	1,763	5,540
Derivative liabilities at fair value	-9,436	-10,879
Not Designated as Hedging Instrument | Basis (floating to floating)	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	300	300
Derivative assets at fair value	2	4
Derivative liabilities at fair value	0	0
Not Designated as Hedging Instrument | Option-based	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	101,390	122,010
Derivative assets at fair value	3,055	4,112
Derivative liabilities at fair value	-59	-204
Not Designated as Hedging Instrument | Call swaptions | Purchased	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	53,800	59,290
Derivative assets at fair value	2,012	2,373
Derivative liabilities at fair value	0	0
Not Designated as Hedging Instrument | Call swaptions | Written	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	5,855	5,945
Derivative assets at fair value	0	0
Derivative liabilities at fair value	-57	-201
Not Designated as Hedging Instrument | Put swaptions | Purchased	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	26,475	33,410
Derivative assets at fair value	351	698
Derivative liabilities at fair value	0	0
Not Designated as Hedging Instrument | Put swaptions | Written	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	1,345	0
Derivative assets at fair value	0	0
Derivative liabilities at fair value	-2	0
Not Designated as Hedging Instrument | Other option-based derivatives	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	13,915	23,365
Derivative assets at fair value	692	1,041
Derivative liabilities at fair value	0	-3
Not Designated as Hedging Instrument | Futures	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	40,000	50,270
Derivative assets at fair value	0	0
Derivative liabilities at fair value	0	0
Not Designated as Hedging Instrument | Foreign-currency swaps	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	0	528
Derivative assets at fair value	0	39
Derivative liabilities at fair value	0	0
Not Designated as Hedging Instrument | Commitments	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	47,070	18,731
Derivative assets at fair value	88	61
Derivative liabilities at fair value	-66	-69
Not Designated as Hedging Instrument | Credit derivatives	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	5,307	5,386
Derivative assets at fair value	14	0
Derivative liabilities at fair value	-19	-6
Not Designated as Hedging Instrument | Swap guarantee derivatives	'	'
Derivative [Line Items]	'	'
Notional or contractual amount	3,305	3,477
Derivative assets at fair value	0	0
Derivative liabilities at fair value	($28)	($31)

Derivatives_Gains_and_Losses_o

Derivatives - Gains and Losses on Derivatives (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	($617)	($74)	($4,894)	$1,663
Not Designated as Hedging Instrument	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	-617	-74	-4,894	1,663
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	10	834	-2,920	4,410
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Interest Rate Swaps	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	-184	1,112	-3,505	6,408
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Receive-fixed	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	-751	-73	2,300	-8,342
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Foreign-currency denominated	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	0	-5	-1	-16
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | U.S. dollar denominated	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	-751	-68	2,301	-8,326
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Pay-fixed	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	568	1,184	-5,804	14,752
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Basis (floating to floating)	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	-1	1	-1	-2
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Option-based	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	78	-238	344	-1,897
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Call swaptions | Purchased	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	99	-94	1,172	-1,954
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Call swaptions | Written	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	7	42	-145	424
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Put swaptions | Purchased	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	-41	-157	-817	-29
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Other option-based derivatives	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	13	-29	134	-338
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Futures	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	-3	-2	-43	54
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Foreign-currency swaps	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	0	20	-7	20
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Commitments	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	100	-59	296	-180
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Credit derivatives	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	19	0	-9	0
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Swap guarantee derivatives	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	1	2	6	7
Not Designated as Hedging Instrument | Derivative gains (losses) excluding accrual of periodic settlements | Other	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	-1	-1	-2	-2
Not Designated as Hedging Instrument | Accrual of periodic settlements	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	-627	-908	-1,974	-2,747
Not Designated as Hedging Instrument | Accrual of periodic settlements | Receive-fixed	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	726	1,005	2,343	2,831
Not Designated as Hedging Instrument | Accrual of periodic settlements | Pay-fixed	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	-1,354	-1,913	-4,319	-5,579
Not Designated as Hedging Instrument | Accrual of periodic settlements | Other	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative gains (losses)	$1	$0	$2	$1

Collateral_and_Offsetting_of_A2

Collateral and Offsetting of Assets and Liabilities (Details) (USD $)

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Securities purchased under agreements to resell

Securities purchased under agreements to resell

Multifamily guarantees and mortgage loans

Multifamily guarantees and mortgage loans

Secured uncommitted line of credit

Derivatives and securities

Derivatives and securities

Derivatives

Commitments

Commitments

OTC derivatives

OTC derivatives

OTC derivatives

OTC derivatives

Cleared and exchange-traded derivatives

Cleared and exchange-traded derivatives

Counterparties accounted for greater than 10%

Counterparties accounted for greater than 10%

Net uncollateralized exposure to derivative counterparties

Net uncollateralized exposure to derivative counterparties

numberofcounterparties

S&P Equivalent A or above Rating

numberofcounterparties

Offsetting of Financial Assets and Liabilities [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative collateral, obligation to return cash

$0

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative collateral, right to reclaim cash

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net uncollateralized exposure after applying netting agreements and collateral

470,000,000

631,000,000

'

'

'

'

'

'

'

'

'

'

66,000,000

188,000,000

'

'

302,000,000

382,000,000

Maximum loss after applying netting agreements and collateral

'

'

'

'

'

'

'

'

'

'

'

'

66,000,000

'

'

'

'

'

Number of counterparties

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4

3

'

'

Concentration risk percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

84.00%

'

'

'

Total exposure on our commitments

'

'

'

'

'

'

'

'

'

'

88,000,000

61,000,000

'

'

'

'

'

'

Collateral pledged to Freddie Mac in form of cash

'

'

'

'

84,000,000

66,000,000

'

'

'

'

'

'

1,400,000,000

1,900,000,000

'

'

0

646,000,000

Securities collateral pledged to Freddie Mac offsetting our exposure

427,000,000

432,000,000

'

'

'

'

'

'

'

'

'

'

427,000,000

432,000,000

'

'

0

0

Collateral pledged to Freddie Mac in form of securities

'

'

0

5,000,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Federal funds sold

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivatives in a net liability position

2,500,000,000

'

'

'

'

'

'

'

'

'

'

'

2,500,000,000

3,200,000,000

'

'

'

'

Collateral already posted, aggregate fair value

2,500,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Securities pledged with the ability for the secured party to repledge

3,545,000,000

11,089,000,000

'

'

'

'

10,500,000,000

'

'

600,000,000

'

'

'

'

'

'

'

'

Collateral pledged by Freddie Mac in form of cash

$2,600,000,000

$3,400,000,000

'

'

'

'

'

$1,900,000,000

$275,000,000

'

'

'

$700,000,000

$3,200,000,000

'

'

'

'

Collateral_and_Offsetting_of_A3

Collateral and Offsetting of Assets and Liabilities - Offsetting of Financial Assets and Liabilities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Derivative Assets:	'	'
Gross Amount Recognized	$9,870,000,000	$15,474,000,000
Amount Offset in the Consolidated Balance Sheets	-8,973,000,000	-14,411,000,000
Net Amount Presented in the Consolidated Balance Sheets	897,000,000	1,063,000,000
Gross Amount Not Offset in the Consolidated Balance Sheets	-427,000,000	-432,000,000
Net Amount	470,000,000	631,000,000
Securities purchased under agreements to resell:	'	'
Gross Amount Recognized	29,956,000,000	62,383,000,000
Amount Offset in the Consolidated Balance Sheets	0	0
Net Amount Presented in the Consolidated Balance Sheets	29,956,000,000	62,383,000,000
Gross Amount Not Offset in the Consolidated Balance Sheets	-29,956,000,000	-62,383,000,000
Net Amount	0	0
Total:	'	'
Gross Amount Recognized	39,826,000,000	77,857,000,000
Amount Offset in the Consolidated Balance Sheets	-8,973,000,000	-14,411,000,000
Net Amount Presented in the Consolidated Balance Sheets	30,853,000,000	63,446,000,000
Gross Amount Not Offset in the Consolidated Balance Sheets	-30,383,000,000	-62,815,000,000
Net Amount	470,000,000	631,000,000
Derivative Liabilities:	'	'
Gross Amount Recognized	-11,944,000,000	-15,462,000,000
Amount Offset in the Consolidated Balance Sheets	10,014,000,000	15,282,000,000
Net Amount Presented in the Consolidated Balance Sheets	-1,930,000,000	-180,000,000
Gross Amount Not Offset in the Consolidated Balance Sheets	1,782,000,000	0
Net Amount	-148,000,000	-180,000,000
Over-the-counter interest-rate and foreign-currency swaps, and option-based derivatives	'	'
Derivative Assets:	'	'
Gross Amount Recognized	9,312,000,000	13,886,000,000
Amount Offset in the Consolidated Balance Sheets	-8,819,000,000	-13,266,000,000
Net Amount Presented in the Consolidated Balance Sheets	493,000,000	620,000,000
Gross Amount Not Offset in the Consolidated Balance Sheets	-427,000,000	-432,000,000
Net Amount	66,000,000	188,000,000
Derivative Liabilities:	'	'
Gross Amount Recognized	-9,930,000,000	-14,616,000,000
Amount Offset in the Consolidated Balance Sheets	8,113,000,000	14,545,000,000
Net Amount Presented in the Consolidated Balance Sheets	-1,817,000,000	-71,000,000
Gross Amount Not Offset in the Consolidated Balance Sheets	1,782,000,000	0
Net Amount	-35,000,000	-71,000,000
Cleared and exchange-traded derivatives	'	'
Derivative Assets:	'	'
Gross Amount Recognized	456,000,000	1,527,000,000
Amount Offset in the Consolidated Balance Sheets	-154,000,000	-1,145,000,000
Net Amount Presented in the Consolidated Balance Sheets	302,000,000	382,000,000
Gross Amount Not Offset in the Consolidated Balance Sheets	0	0
Net Amount	302,000,000	382,000,000
Derivative Liabilities:	'	'
Gross Amount Recognized	-1,901,000,000	-737,000,000
Amount Offset in the Consolidated Balance Sheets	1,901,000,000	737,000,000
Net Amount Presented in the Consolidated Balance Sheets	0	0
Gross Amount Not Offset in the Consolidated Balance Sheets	0	0
Net Amount	0	0
Aggregate fair value of securities posted	1,700,000,000	600,000,000
Other	'	'
Derivative Assets:	'	'
Gross Amount Recognized	102,000,000	61,000,000
Amount Offset in the Consolidated Balance Sheets	0	0
Net Amount Presented in the Consolidated Balance Sheets	102,000,000	61,000,000
Gross Amount Not Offset in the Consolidated Balance Sheets	0	0
Net Amount	102,000,000	61,000,000
Derivative Liabilities:	'	'
Gross Amount Recognized	-113,000,000	-109,000,000
Amount Offset in the Consolidated Balance Sheets	0	0
Net Amount Presented in the Consolidated Balance Sheets	-113,000,000	-109,000,000
Gross Amount Not Offset in the Consolidated Balance Sheets	0	0
Net Amount	($113,000,000)	($109,000,000)

Collateral_and_Offsetting_of_A4

Collateral and Offsetting of Assets and Liabilities - Collateral in the Form of Securities Pledged (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Collateral in the Form of Securities Pledged [Line Items]	'	'
Securities pledged with the ability for the secured party to repledge	$3,545	$11,089
Debt securities of consolidated trusts held by third parties	'	'
Collateral in the Form of Securities Pledged [Line Items]	'	'
Securities pledged with the ability for the secured party to repledge	2,152	10,654
Available-for-sale securities	'	'
Collateral in the Form of Securities Pledged [Line Items]	'	'
Securities pledged with the ability for the secured party to repledge	0	70
Trading securities	'	'
Collateral in the Form of Securities Pledged [Line Items]	'	'
Securities pledged with the ability for the secured party to repledge	$1,393	$365

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'	'	'	'	'	'
Draw received from Treasury	$0	'	'	'	'	'
Expected draw request from Treasury	0	'	'	0	'	'
Applicable capital reserve amount for the year	2,400,000,000	'	'	2,400,000,000	'	3,000,000,000
Applicable capital reserve amount for 2018	0	'	'	0	'	'
Senior preferred stock dividend payable to Treasury in the following quarter	2,800,000,000	'	'	2,800,000,000	'	'
Aggregate liquidation preference on senior preferred stock	72,336,000,000	'	'	72,336,000,000	'	72,336,000,000
Common shares or non-cumulative preferred stock repurchased	0	'	'	0	'	'
Common shares or non-cumulative preferred stock issued	0	'	'	0	'	'
Common dividends declared	'	'	'	0	'	'
Cash dividends paid on senior preferred stock	1,900,000,000	4,500,000,000	10,400,000,000	16,824,000,000	17,155,000,000	'
Dividends declared on preferred stock	'	'	'	0	'	'
Dividends paid on preferred stock	'	'	'	0	'	'
Federal statutory tax rate	35.00%	'	'	35.00%	'	'
Total AOCI related to derivatives designated as cash flow hedges	-849,000,000	'	'	-849,000,000	-1,100,000,000	-1,000,000,000
Cash flow hedge gain (loss) to be reclassified over the next 12 months	($178,000,000)	'	'	'	'	'
Maximum remaining length of time hedged in cash flow hedge	'20 years	'	'	'	'	'

Stockholders_Equity_Changes_in

Stockholders' Equity - Changes in AOCI by Component, Net of Tax (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'	'	'
Beginning balance	'	'	($6,000,000)	'
Total other comprehensive income (loss), net of taxes and reclassification adjustments	705,000,000	-49,000,000	1,712,000,000	1,710,000,000
Ending balance	1,706,000,000	'	1,706,000,000	'
Total	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'	'	'
Beginning balance	'	'	-6,000,000	-2,938,000,000
Other comprehensive income (loss) before reclassifications	'	'	1,904,000,000	2,084,000,000
Amounts reclassified from accumulated other comprehensive income	'	'	-192,000,000	-374,000,000
Total other comprehensive income (loss), net of taxes and reclassification adjustments	'	'	1,712,000,000	1,710,000,000
Ending balance	1,706,000,000	-1,228,000,000	1,706,000,000	-1,228,000,000
AOCI related to available-for-sale securities	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'	'	'
Beginning balance	'	'	962,000,000	-1,444,000,000
Other comprehensive income (loss) before reclassifications	'	'	1,903,000,000	2,066,000,000
Amounts reclassified from accumulated other comprehensive income	'	'	-341,000,000	-630,000,000
Total other comprehensive income (loss), net of taxes and reclassification adjustments	'	'	1,562,000,000	1,436,000,000
Ending balance	2,524,000,000	-8,000,000	2,524,000,000	-8,000,000
Tax expense related to AFS - other comprehensive income before reclassifications	'	'	1,000,000,000	1,100,000,000
AOCI related to cash flow hedge relationships	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'	'	'
Beginning balance	'	'	-1,000,000,000	-1,316,000,000
Other comprehensive income (loss) before reclassifications	'	'	0	0
Amounts reclassified from accumulated other comprehensive income	'	'	151,000,000	250,000,000
Total other comprehensive income (loss), net of taxes and reclassification adjustments	'	'	151,000,000	250,000,000
Ending balance	-849,000,000	-1,066,000,000	-849,000,000	-1,066,000,000
AOCI related to defined benefit plans	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'	'	'
Beginning balance	'	'	32,000,000	-178,000,000
Other comprehensive income (loss) before reclassifications	'	'	1,000,000	18,000,000
Amounts reclassified from accumulated other comprehensive income	'	'	-2,000,000	6,000,000
Total other comprehensive income (loss), net of taxes and reclassification adjustments	'	'	-1,000,000	24,000,000
Ending balance	$31,000,000	($154,000,000)	$31,000,000	($154,000,000)

Stockholders_Equity_Reclassifi

Stockholders' Equity - Reclassifications from AOCI to Net Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Other gains (losses) on investment securities recognized in earnings	($109)	$620	$1,029	($153)
Net impairment of available-for-sale securities recognized in earnings	-166	-126	-687	-213
Total interest expense	-13,484	-13,564	-41,416	-41,735
Expense related to derivatives	-75	-107	-230	-360
Salaries and employee benefits	-231	-207	-687	-626
Income before income tax (expense) benefit	3,037	6,526	10,837	16,019
Income tax (expense) benefit	-956	23,960	-3,374	24,036
Net income	2,081	30,486	7,463	40,055
Total reclassifications in the period	'	'	'	'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Net income	-87	377	192	374
AOCI related to available-for-sale securities | Total reclassifications in the period	'	'	'	'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Other gains (losses) on investment securities recognized in earnings	107	827	1,212	1,182
Net impairment of available-for-sale securities recognized in earnings	-166	-126	-687	-213
Income before income tax (expense) benefit	-59	701	525	969
Income tax (expense) benefit	21	-246	-184	-339
Net income	-38	455	341	630
AOCI related to cash flow hedge relationships | Total reclassifications in the period	'	'	'	'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Expense related to derivatives	-75	-107	-230	-360
Income before income tax (expense) benefit	-76	-110	-232	-365
Income tax (expense) benefit	26	34	81	115
Net income	-50	-76	-151	-250
AOCI related to cash flow hedge relationships | Total reclassifications in the period | Freddie Mac parent	'	'	'	'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Total interest expense	-1	-3	-2	-5
AOCI related to defined benefit plans | Total reclassifications in the period	'	'	'	'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Salaries and employee benefits	1	-2	3	-6
Income tax (expense) benefit	0	0	-1	0
Net income	$1	($2)	$2	($6)

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'	'	'	'	'
Income tax (expense) benefit	($956,000,000)	$23,960,000,000	($3,374,000,000)	$24,036,000,000	'
Effective Income Tax Rate Reconciliation, Percent	31.50%	-367.10%	31.10%	-150.00%	'
Federal statutory tax rate	35.00%	'	35.00%	'	'
Deferred tax assets, net	18,500,000,000	'	18,500,000,000	'	22,700,000,000
Unrecognized Tax Benefits	$0	'	$0	'	'

Segment_Reporting_Details

Segment Reporting (Details) (USD $)	9 Months Ended
In Billions, unless otherwise specified	Sep. 30, 2014
	numberofreportablesegments
Segment Reporting Information [Line Items]	'
Number of reportable segments	3
Single-family Guarantee	'
Segment Reporting Information [Line Items]	'
Unamortized balance of buy down fees	0.3
Unamortized balance of delivery fees	0.8
Investments	'
Segment Reporting Information [Line Items]	'
Unamortized balance of cash premiums and discounts, net	3.3
Unamortized balance of buy up fees	0.4

Segment_Reporting_Summary_of_S

Segment Reporting - Summary of Segment Earnings and Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Net income	$2,081	$30,486	$7,463	$40,055
Comprehensive income (loss)	2,786	30,437	9,175	41,765
All Other	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net income	0	23,926	-13	23,898
Comprehensive income (loss)	0	23,926	-13	23,898
Operating segments and All Other	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net income	2,081	30,486	7,463	40,055
Comprehensive income (loss)	2,786	30,437	9,175	41,765
Single-family Guarantee | Operating segments	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net income	196	2,019	1,077	4,546
Comprehensive income (loss)	195	2,021	1,076	4,560
Investments | Operating segments	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net income	1,440	3,902	5,060	9,051
Comprehensive income (loss)	2,259	4,335	6,953	12,016
Multifamily | Operating segments	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net income	445	639	1,339	2,560
Comprehensive income (loss)	$332	$155	$1,159	$1,291

Segment_Reporting_Segment_Earn

Segment Reporting - Segment Earnings and Reconciliation to GAAP Results (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Interest Income (Expense), Net	$3,663	$4,276	$10,676	$12,685
(Provision) benefit for credit losses	-574	1,138	-41	2,264
Non-interest income (loss)	'	'	'	'
Management and guarantee income	84	70	244	193
Net impairment of available-for-sale securities recognized in earnings	-166	-126	-687	-213
Derivative gains (losses)	-617	-74	-4,894	1,663
Gains (losses) on trading securities	-216	-207	-183	-1,335
Gains (losses) on mortgage loans	168	114	383	-440
Other non-interest income (loss)	1,511	1,912	7,606	2,901
Non-interest expense	'	'	'	'
Administrative expenses	-472	-455	-1,393	-1,331
Real estate owned operations income (expense)	-103	79	-112	183
Temporary Payroll Tax Cut Continuation Act of 2011 expense	-198	-150	-563	-366
Other expenses	-43	-51	-199	-185
Segment Adjustments	0	0	0	0
Income tax (expense) benefit	-956	23,960	-3,374	24,036
Net income (loss)	2,081	30,486	7,463	40,055
Changes in unrealized gains (losses) related to available-for-sale securities	656	-127	1,562	1,436
Changes in unrealized gains (losses) related to cash flow hedge relationships	50	76	151	250
Changes in defined benefit plans	-1	2	-1	24
Total other comprehensive income (loss), net of taxes	705	-49	1,712	1,710
Comprehensive income (loss)	2,786	30,437	9,175	41,765
All Other	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Interest Income (Expense), Net	0	0	0	0
(Provision) benefit for credit losses	0	0	0	0
Non-interest income (loss)	'	'	'	'
Management and guarantee income	0	0	0	0
Net impairment of available-for-sale securities recognized in earnings	0	0	0	0
Derivative gains (losses)	0	0	0	0
Gains (losses) on trading securities	0	0	0	0
Gains (losses) on mortgage loans	0	0	0	0
Other non-interest income (loss)	0	0	0	0
Non-interest expense	'	'	'	'
Administrative expenses	0	0	0	0
Real estate owned operations income (expense)	0	0	0	0
Temporary Payroll Tax Cut Continuation Act of 2011 expense	0	0	0	0
Other expenses	0	0	-18	-27
Segment Adjustments	0	0	0	0
Income tax (expense) benefit	0	23,926	5	23,925
Net income (loss)	0	23,926	-13	23,898
Changes in unrealized gains (losses) related to available-for-sale securities	0	0	0	0
Changes in unrealized gains (losses) related to cash flow hedge relationships	0	0	0	0
Changes in defined benefit plans	0	0	0	0
Total other comprehensive income (loss), net of taxes	0	0	0	0
Comprehensive income (loss)	0	23,926	-13	23,898
Operating segments and All Other	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Interest Income (Expense), Net	1,021	1,407	3,002	3,996
(Provision) benefit for credit losses	-808	913	-690	1,641
Non-interest income (loss)	'	'	'	'
Management and guarantee income	1,406	1,282	3,950	3,918
Net impairment of available-for-sale securities recognized in earnings	37	12	-95	58
Derivative gains (losses)	196	1,009	-2,247	4,785
Gains (losses) on trading securities	-216	-207	-183	-1,335
Gains (losses) on mortgage loans	168	114	383	-440
Other non-interest income (loss)	1,956	2,458	8,749	4,837
Non-interest expense	'	'	'	'
Administrative expenses	-472	-455	-1,393	-1,331
Real estate owned operations income (expense)	-103	79	-112	183
Temporary Payroll Tax Cut Continuation Act of 2011 expense	-198	-150	-563	-366
Other expenses	-43	-51	-199	-185
Segment Adjustments	93	115	235	258
Income tax (expense) benefit	-956	23,960	-3,374	24,036
Net income (loss)	2,081	30,486	7,463	40,055
Changes in unrealized gains (losses) related to available-for-sale securities	656	-127	1,562	1,436
Changes in unrealized gains (losses) related to cash flow hedge relationships	50	76	151	250
Changes in defined benefit plans	-1	2	-1	24
Total other comprehensive income (loss), net of taxes	705	-49	1,712	1,710
Comprehensive income (loss)	2,786	30,437	9,175	41,765
Reconciling Items	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Interest Income (Expense), Net	2,642	2,869	7,674	8,689
(Provision) benefit for credit losses	234	225	649	623
Non-interest income (loss)	'	'	'	'
Management and guarantee income	-1,322	-1,212	-3,706	-3,725
Net impairment of available-for-sale securities recognized in earnings	-203	-138	-592	-271
Derivative gains (losses)	-813	-1,083	-2,647	-3,122
Gains (losses) on trading securities	0	0	0	0
Gains (losses) on mortgage loans	0	0	0	0
Other non-interest income (loss)	-445	-546	-1,143	-1,936
Non-interest expense	'	'	'	'
Administrative expenses	0	0	0	0
Real estate owned operations income (expense)	0	0	0	0
Temporary Payroll Tax Cut Continuation Act of 2011 expense	0	0	0	0
Other expenses	0	0	0	0
Segment Adjustments	-93	-115	-235	-258
Income tax (expense) benefit	0	0	0	0
Net income (loss)	0	0	0	0
Changes in unrealized gains (losses) related to available-for-sale securities	0	0	0	0
Changes in unrealized gains (losses) related to cash flow hedge relationships	0	0	0	0
Changes in defined benefit plans	0	0	0	0
Total other comprehensive income (loss), net of taxes	0	0	0	0
Comprehensive income (loss)	0	0	0	0
Reclassifications	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Interest Income (Expense), Net	2,474	2,600	7,206	7,835
(Provision) benefit for credit losses	234	225	649	623
Non-interest income (loss)	'	'	'	'
Management and guarantee income	-1,247	-1,058	-3,473	-3,129
Net impairment of available-for-sale securities recognized in earnings	-203	-138	-592	-271
Derivative gains (losses)	-813	-1,083	-2,647	-3,122
Gains (losses) on trading securities	0	0	0	0
Gains (losses) on mortgage loans	0	0	0	0
Other non-interest income (loss)	-445	-546	-1,143	-1,936
Non-interest expense	'	'	'	'
Administrative expenses	0	0	0	0
Real estate owned operations income (expense)	0	0	0	0
Temporary Payroll Tax Cut Continuation Act of 2011 expense	0	0	0	0
Other expenses	0	0	0	0
Segment Adjustments	0	0	0	0
Income tax (expense) benefit	0	0	0	0
Net income (loss)	0	0	0	0
Changes in unrealized gains (losses) related to available-for-sale securities	0	0	0	0
Changes in unrealized gains (losses) related to cash flow hedge relationships	0	0	0	0
Changes in defined benefit plans	0	0	0	0
Total other comprehensive income (loss), net of taxes	0	0	0	0
Comprehensive income (loss)	0	0	0	0
Segment Adjustments	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Interest Income (Expense), Net	168	269	468	854
(Provision) benefit for credit losses	0	0	0	0
Non-interest income (loss)	'	'	'	'
Management and guarantee income	-75	-154	-233	-596
Net impairment of available-for-sale securities recognized in earnings	0	0	0	0
Derivative gains (losses)	0	0	0	0
Gains (losses) on trading securities	0	0	0	0
Gains (losses) on mortgage loans	0	0	0	0
Other non-interest income (loss)	0	0	0	0
Non-interest expense	'	'	'	'
Administrative expenses	0	0	0	0
Real estate owned operations income (expense)	0	0	0	0
Temporary Payroll Tax Cut Continuation Act of 2011 expense	0	0	0	0
Other expenses	0	0	0	0
Segment Adjustments	-93	-115	-235	-258
Income tax (expense) benefit	0	0	0	0
Net income (loss)	0	0	0	0
Changes in unrealized gains (losses) related to available-for-sale securities	0	0	0	0
Changes in unrealized gains (losses) related to cash flow hedge relationships	0	0	0	0
Changes in defined benefit plans	0	0	0	0
Total other comprehensive income (loss), net of taxes	0	0	0	0
Comprehensive income (loss)	0	0	0	0
Single-family Guarantee | Operating segments	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Interest Income (Expense), Net	19	203	-27	300
(Provision) benefit for credit losses	-818	885	-742	1,474
Non-interest income (loss)	'	'	'	'
Management and guarantee income	1,341	1,230	3,764	3,771
Net impairment of available-for-sale securities recognized in earnings	0	0	0	0
Derivative gains (losses)	19	0	-9	0
Gains (losses) on trading securities	0	0	0	0
Gains (losses) on mortgage loans	52	0	-143	0
Other non-interest income (loss)	351	246	602	695
Non-interest expense	'	'	'	'
Administrative expenses	-302	-263	-855	-756
Real estate owned operations income (expense)	-109	67	-120	168
Temporary Payroll Tax Cut Continuation Act of 2011 expense	-198	-150	-563	-366
Other expenses	-40	-45	-159	-139
Segment Adjustments	-75	-154	-233	-596
Income tax (expense) benefit	-44	0	-438	-5
Net income (loss)	196	2,019	1,077	4,546
Changes in unrealized gains (losses) related to available-for-sale securities	0	0	0	0
Changes in unrealized gains (losses) related to cash flow hedge relationships	0	0	0	0
Changes in defined benefit plans	-1	2	-1	14
Total other comprehensive income (loss), net of taxes	-1	2	-1	14
Comprehensive income (loss)	195	2,021	1,076	4,560
Investments | Operating segments	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Interest Income (Expense), Net	762	883	2,324	2,752
(Provision) benefit for credit losses	0	0	0	0
Non-interest income (loss)	'	'	'	'
Management and guarantee income	0	0	0	0
Net impairment of available-for-sale securities recognized in earnings	37	16	-95	73
Derivative gains (losses)	-133	1,624	-2,745	3,235
Gains (losses) on trading securities	-202	-184	-243	-1,213
Gains (losses) on mortgage loans	0	0	0	0
Other non-interest income (loss)	1,594	1,503	8,004	3,214
Non-interest expense	'	'	'	'
Administrative expenses	-104	-133	-339	-377
Real estate owned operations income (expense)	0	0	0	0
Temporary Payroll Tax Cut Continuation Act of 2011 expense	0	0	0	0
Other expenses	0	0	-6	-1
Segment Adjustments	168	269	468	854
Income tax (expense) benefit	-682	-76	-2,308	514
Net income (loss)	1,440	3,902	5,060	9,051
Changes in unrealized gains (losses) related to available-for-sale securities	769	357	1,742	2,707
Changes in unrealized gains (losses) related to cash flow hedge relationships	50	76	151	250
Changes in defined benefit plans	0	0	0	8
Total other comprehensive income (loss), net of taxes	819	433	1,893	2,965
Comprehensive income (loss)	2,259	4,335	6,953	12,016
Multifamily | Operating segments	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Interest Income (Expense), Net	240	321	705	944
(Provision) benefit for credit losses	10	28	52	167
Non-interest income (loss)	'	'	'	'
Management and guarantee income	65	52	186	147
Net impairment of available-for-sale securities recognized in earnings	0	-4	0	-15
Derivative gains (losses)	310	-615	507	1,550
Gains (losses) on trading securities	-14	-23	60	-122
Gains (losses) on mortgage loans	116	114	526	-440
Other non-interest income (loss)	11	709	143	928
Non-interest expense	'	'	'	'
Administrative expenses	-66	-59	-199	-198
Real estate owned operations income (expense)	6	12	8	15
Temporary Payroll Tax Cut Continuation Act of 2011 expense	0	0	0	0
Other expenses	-3	-6	-16	-18
Segment Adjustments	0	0	0	0
Income tax (expense) benefit	-230	110	-633	-398
Net income (loss)	445	639	1,339	2,560
Changes in unrealized gains (losses) related to available-for-sale securities	-113	-484	-180	-1,271
Changes in unrealized gains (losses) related to cash flow hedge relationships	0	0	0	0
Changes in defined benefit plans	0	0	0	2
Total other comprehensive income (loss), net of taxes	-113	-484	-180	-1,269
Comprehensive income (loss)	$332	$155	$1,159	$1,291

Financial_Guarantees_Details

Financial Guarantees (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Billions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Mortgage related securities backed by single-family loans

Mortgage related securities backed by single-family loans

Mortgage related securities backed by single-family loans

Mortgage related securities backed by single-family loans

Mortgage related securities backed by multifamily mortgage loans

Mortgage related securities backed by multifamily mortgage loans

Mortgage related securities backed by multifamily mortgage loans

Mortgage related securities backed by multifamily mortgage loans

Single-family long-term standby commitments

Single-family long-term standby commitments

Single-family long-term standby commitments

Credit enhanced multifamily housing revenue bonds

Credit enhanced multifamily housing revenue bonds

Securities backed by HFA bonds

Securities backed by HFA bonds

Non-consolidated Freddie Mac securities

Non-consolidated Freddie Mac securities

Non-consolidated Freddie Mac securities

Non-consolidated Freddie Mac securities

Guarantor Obligations [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

UPB of Issuances and Guarantees

$77.40

$98

$186.90

$362

$3.90

$5.30

$11

$17.50

$2.10

$8.40

'

'

'

'

'

UPB of Guarantees

'

'

'

'

'

'

'

'

$16.50

'

$19.20

$9.10

$9.10

$0.40

$0.90

Financial_Guarantees_Financial

Financial Guarantees - Financial Guarantees (Details) (USD $)

Sep. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Other guarantee commitments

Other guarantee commitments

Derivative Instruments

Derivative Instruments

Non-consolidated Freddie Mac securities

Non-consolidated Freddie Mac securities

Payment Guarantee

Payment Guarantee

Guarantor Obligations [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Maximum Exposure

'

'

'

'

'

'

$26,076,000,000

$29,160,000,000

$10,740,000,000

$9,856,000,000

$81,117,000,000

$71,809,000,000

Recognized Liability

1,561,000,000

'

1,522,000,000

'

'

'

754,000,000

791,000,000

90,000,000

239,000,000

806,000,000

731,000,000

Maximum Remaining Term

'

'

'

'

'

'

'35 years

'36 years

'31 years

'32 years

'39 years

'40 years

Reserve for guarantee losses

110,000,000

116,000,000

111,000,000

127,000,000

143,000,000

183,000,000

'

'

'

'

'

'

Cash advances related to multifamily liquidity guarantees

$0

'

$0

'

'

'

'

'

'

'

'

'

Concentration_of_Credit_and_Ot2

Concentration of Credit and Other Risks (Details) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

numberofcorporatefamilies

Current LTV ratio greater than 100%

Current LTV ratio greater than 100%

Current LTV ratio greater than 100%

Current LTV ratio greater than 100%

Current LTV ratio greater than 100%

Current LTV ratio greater than 100%

2005 to 2008 Legacy single-family book

2005 to 2008 Legacy single-family book

2005 to 2008 Legacy single-family book

2005 to 2008 Legacy single-family book

2005 to 2008 Legacy single-family book

2005 to 2008 Legacy single-family book

Current DSCR less than 1.0

Current DSCR less than 1.0

Current DSCR less than 1.0

Current DSCR less than 1.0

Seller/Servicers

Seller/Servicers

Seller/Servicers

Top Single-family Seller/Servicers

Wells Fargo Bank, N.A.

Top Single-family servicers based on loans serviced

Wells Fargo Bank, N.A.

JPMorgan Chase Bank, N.A.

Three largest non-depository specialty servicers

Three largest non-depository specialty servicers

Ocwen Financial Corp.

Mortgage Insurers

Mortgage Insurers

Mortgage Insurers

Mortgage Insurers

Mortgage Insurers

RMIC

Counterparties accounted for 10% or more

Counterparties accounted for 10% or more

Counterparties accounted for 10% or more

Bond Insurers

Cash and Other Investment Counterparties

Cash and Other Investment Counterparties

S&P short-term credit ratings of A-1 or above

S&P short-term credit ratings of A-1 or above

S&P short-term credit rating of A-2

S&P short-term credit rating of A-2

No third party credit rating

No third party credit rating

Federal Resrve Bank of New York

US Treasury

Non-Agency Mortgage-Related Security Issuers

Single-family UPB

Single-family UPB

Multifamily UPB

Multifamily UPB

Single-family UPB

Single-family UPB

Single-family Credit Losses

Single-family Credit Losses

Multifamily UPB

Multifamily UPB

Single-family loan purchase volume

Single-family loan purchase volume

Single-family loan serviced

Single-family loan serviced

Single-family loan serviced

Single-family UPB

Single-family UPB

Single-family non-agency mortgage related securities serviced

S&P equivalent BB- rating

S&P equivalent BBB plus rating

Multifamily loan serviced

Mortgage insurance coverage

Bond insurance coverage

Repurchase agreements

Repurchase agreements

Repurchase agreements

numberofcounterparties

numberofcounterparties

numberofcounterparties

numberofcounterparties

numberofcounterparties

numberofcounterparties

numberofcounterparties

numberofcounterparties

numberofcounterparties

numberofcounterparties

Concentration Risk [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

UPB of single-family credit guarantee portfolio

$1,700,000,000,000

'

$1,700,000,000,000

'

$1,700,000,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

Concentration risk percentage

'

'

'

'

'

'

'

'

'

7.00%

10.00%

1.00%

2.00%

'

'

14.00%

16.00%

83.00%

82.00%

'

'

2.00%

3.00%

'

'

'

50.00%

13.00%

'

23.00%

12.00%

10.00%

10.00%

42.00%

'

'

'

'

'

'

38.00%

80.00%

92.00%

'

'

'

'

'

'

'

'

'

'

'

'

Single-Family serious delinquency rate

'

'

'

'

'

'

'

8.92%

9.94%

'

'

'

'

7.66%

8.77%

'

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'

'

Current average DSCR for multifamily loans

'

'

'

'

'

'

'

1.07

0.95

'

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'

'

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Average current LTV ratio for multifamily loans

'

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'

'

'

'

'

87.00%

95.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of counterparties

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10

'

2

'

'

'

'

'

'

'

'

3

1

'

3

4

4

'

'

'

'

14

'

1

'

3

'

'

'

UPB of loans subject to repurchase requests issued to Single-family Seller/Servicers

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

800,000,000

800,000,000

2,200,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Recovered losses from repurchase requests to Single-family Seller/Servicer

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000,000

1,700,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Mortgage loans unpaid principal balance covered by counterparty agreement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

26,100,000,000

26,100,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount of counterparty agreement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

400,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

(Provision) benefit for credit losses

-574,000,000

1,138,000,000

-41,000,000

2,264,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum loss limit from mortgage insurers for single-family credit guarantee portfolio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

56,900,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

UPB of single-family credit guarantee portfolio with mortgage insurance coverage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

225,300,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash proceeds received from mortgage insurers

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000,000

1,600,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Receivables outstanding from mortgage Insurers

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

400,000,000

'

700,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Receivables outstanding, net of reserves, from mortgage insurers

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000,000

'

500,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percent of claim payment in cash

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percent of partial claim payment previously made in cash

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

60.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percent of partial claim payment previously made in deferred payment obligations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

40.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum principal exposure - bond insurance

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,100,000,000

'

'

'

'

'

'

'

'

'

'

'

Cash and other non-mortgage investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

52,400,000,000

85,900,000,000

'

'

'

'

'

'

'

'

'

Securities purchased under agreement to resell

29,956,000,000

'

29,956,000,000

'

62,383,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20,900,000,000

'

600,000,000

'

8,500,000,000

'

'

'

'

Cash and cash equivalents

16,191,000,000

9,532,000,000

16,191,000,000

9,532,000,000

11,281,000,000

8,513,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

21,900,000,000

400,000,000

'

Number of corporate families

'

'

'

'

'

'

18

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-interest income (loss)

$764,000,000

$1,689,000,000

$2,469,000,000

$2,769,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$6,100,000,000

Concentration_of_Credit_and_Ot3

Concentration of Credit and Other Risks - Concentration of Credit Risk - Single-Family Credit Guarantee Portfolio (Details)

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Year Of Origination

Year Of Origination

Originated in 2014

Originated in 2013

Originated in 2013

Originated in 2012

Originated in 2012

Originated in 2011

Originated in 2011

Originated in 2010

Originated in 2010

Originated in 2009

Originated in 2009

Subtotal - New single-family book

Subtotal - New single-family book

HARP and other relief refinance loans

HARP and other relief refinance loans

2005 to 2008 Legacy single-family book

2005 to 2008 Legacy single-family book

Pre-2005 Legacy single-family book

Pre-2005 Legacy single-family book

Region

Region

West

West

Northeast

Northeast

North Central

North Central

Southeast

Southeast

Southwest

Southwest

State

State

Arizona, California, Florida, and Nevada

Arizona, California, Florida, and Nevada

Illinois, Michigan, and Ohio

Illinois, Michigan, and Ohio

New York and New Jersey

New York and New Jersey

All Other

All Other

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family UPB

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Single-family Credit Losses

Year Of Origination

Year Of Origination

Originated in 2014

Originated in 2013

Originated in 2013

Originated in 2012

Originated in 2012

Originated in 2011

Originated in 2011

Originated in 2010

Originated in 2010

Originated in 2009

Originated in 2009

Subtotal - New single-family book

Subtotal - New single-family book

HARP and other relief refinance loans

HARP and other relief refinance loans

2005 to 2008 Legacy single-family book

2005 to 2008 Legacy single-family book

Pre-2005 Legacy single-family book

Pre-2005 Legacy single-family book

Region

Region

West

West

Northeast

Northeast

North Central

North Central

Southeast

Southeast

Southwest

Southwest

State

State

Arizona, California, Florida, and Nevada

Arizona, California, Florida, and Nevada

Illinois, Michigan, and Ohio

Illinois, Michigan, and Ohio

New York and New Jersey

New York and New Jersey

All Other

All Other

Year Of Origination

Year Of Origination

Originated in 2014

Originated in 2013

Originated in 2013

Originated in 2012

Originated in 2012

Originated in 2011

Originated in 2011

Originated in 2010

Originated in 2010

Originated in 2009

Originated in 2009

Subtotal - New single-family book

Subtotal - New single-family book

HARP and other relief refinance loans

HARP and other relief refinance loans

2005 to 2008 Legacy single-family book

2005 to 2008 Legacy single-family book

Pre-2005 Legacy single-family book

Pre-2005 Legacy single-family book

Region

Region

West

West

Northeast

Northeast

North Central

North Central

Southeast

Southeast

Southwest

Southwest

State

State

Arizona, California, Florida, and Nevada

Arizona, California, Florida, and Nevada

Illinois, Michigan, and Ohio

Illinois, Michigan, and Ohio

New York and New Jersey

New York and New Jersey

All Other

All Other

Concentration Risk [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Concentration risk percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

100.00%

8.00%

16.00%

16.00%

15.00%

16.00%

7.00%

8.00%

6.00%

7.00%

6.00%

7.00%

58.00%

54.00%

20.00%

21.00%

14.00%

16.00%

8.00%

9.00%

100.00%

100.00%

29.00%

28.00%

26.00%

26.00%

17.00%

18.00%

16.00%

16.00%

12.00%

12.00%

100.00%

100.00%

26.00%

26.00%

10.00%

11.00%

9.00%

9.00%

55.00%

54.00%

100.00%

100.00%

0.00%

0.00%

0.00%

0.00%

0.00%

0.00%

0.00%

0.00%

1.00%

2.00%

2.00%

2.00%

3.00%

7.00%

6.00%

83.00%

82.00%

8.00%

9.00%

100.00%

100.00%

13.00%

27.00%

26.00%

13.00%

21.00%

23.00%

36.00%

34.00%

4.00%

3.00%

100.00%

100.00%

37.00%

49.00%

17.00%

19.00%

10.00%

3.00%

36.00%

29.00%

Serious delinquency rate

1.96%

2.39%

0.01%

0.04%

0.01%

0.07%

0.04%

0.23%

0.18%

0.44%

0.39%

0.89%

0.88%

0.23%

0.24%

0.70%

0.64%

7.66%

8.77%

3.12%

3.24%

1.96%

2.39%

1.31%

1.73%

2.87%

3.23%

1.53%

1.81%

2.56%

3.42%

1.17%

1.36%

1.96%

2.39%

2.09%

3.01%

1.77%

2.11%

4.69%

5.11%

1.57%

1.85%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Concentration_of_Credit_and_Ot4

Concentration of Credit and Other Risks - Certain Higher-Risk Categories in the Single-Family Credit Guarantee Portfolio (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Interest-only	'	'
Concentration Risk [Line Items]	'	'
Serious delinquency rate	9.89%	12.51%
Option ARM	'	'
Concentration Risk [Line Items]	'	'
Serious delinquency rate	10.39%	12.30%
Alt-A	'	'
Concentration Risk [Line Items]	'	'
Serious delinquency rate	8.81%	10.06%
Original LTV ratio greater than 90%	'	'
Concentration Risk [Line Items]	'	'
Serious delinquency rate	2.64%	3.22%
Lower FICO scores at origination (less than 620)	'	'
Concentration Risk [Line Items]	'	'
Serious delinquency rate	8.71%	9.99%
Single-family UPB | Interest-only	'	'
Concentration Risk [Line Items]	'	'
Percentage of Portfolio	2.00%	2.00%
Single-family UPB | Option ARM	'	'
Concentration Risk [Line Items]	'	'
Percentage of Portfolio	0.00%	0.00%
Single-family UPB | Alt-A	'	'
Concentration Risk [Line Items]	'	'
Percentage of Portfolio	3.00%	3.00%
Single-family UPB | Original LTV ratio greater than 90%	'	'
Concentration Risk [Line Items]	'	'
Percentage of Portfolio	16.00%	16.00%
Single-family UPB | Lower FICO scores at origination (less than 620)	'	'
Concentration Risk [Line Items]	'	'
Percentage of Portfolio	3.00%	3.00%

Concentration_of_Credit_and_Ot5

Fair Value Disclosures (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Fair Value Disclosures [Line Items]	'	'	'	'	'
Net transfer in (out) between Level 1 and Level 2 fair value assets	$1,000,000	$1,000,000	$1,000,000	$1,000,000	'
Net transfer in (out) between Level 1 and Level 2 fair value liabilities	1,000,000	1,000,000	1,000,000	1,000,000	'
Unpaid Principal Balance Of Loans Where Whole Loan Market Is Principal Market	73,500,000,000	'	73,500,000,000	'	101,200,000,000
Unpaid Principal Balance Of Loans Where GSE Securitization Market Is Principal Market	1,600,000,000,000	'	1,600,000,000,000	'	1,500,000,000,000
Decrease (Increase) Of Fair Value Of Mortgage Loans Without Benefits Reflected In The Pricing Of HARP Loans	21,300,000,000	'	21,300,000,000	'	18,500,000,000
Total Fair Value Of The HARP Loans Presented In Consolidated Fair Value Balance Sheets	126,300,000,000	'	126,300,000,000	'	145,000,000,000
Multifamily Held-For-Sale Loans with Fair Value Option Elected	'	'	'	'	'
Fair Value Disclosures [Line Items]	'	'	'	'	'
Fair Value, Option, Changes in Fair Value, Gain (Loss)	117,000,000	113,000,000	526,000,000	-441,000,000	'
Debt securities with Fair Value Option Elected	'	'	'	'	'
Fair Value Disclosures [Line Items]	'	'	'	'	'
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$156,000,000	($28,000,000)	($22,000,000)	($13,000,000)	'

Fair_Value_Disclosures_Details

Fair Value Disclosures (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Fair Value Disclosures [Line Items]	'	'	'	'	'
Net transfer in (out) between Level 1 and Level 2 fair value assets	$1,000,000	$1,000,000	$1,000,000	$1,000,000	'
Net transfer in (out) between Level 1 and Level 2 fair value liabilities	1,000,000	1,000,000	1,000,000	1,000,000	'
Unpaid Principal Balance Of Loans Where Whole Loan Market Is Principal Market	73,500,000,000	'	73,500,000,000	'	101,200,000,000
Unpaid Principal Balance Of Loans Where GSE Securitization Market Is Principal Market	1,600,000,000,000	'	1,600,000,000,000	'	1,500,000,000,000
Decrease (Increase) Of Fair Value Of Mortgage Loans Without Benefits Reflected In The Pricing Of HARP Loans	21,300,000,000	'	21,300,000,000	'	18,500,000,000
Total Fair Value Of The HARP Loans Presented In Consolidated Fair Value Balance Sheets	126,300,000,000	'	126,300,000,000	'	145,000,000,000
Multifamily Held-For-Sale Loans with Fair Value Option Elected	'	'	'	'	'
Fair Value Disclosures [Line Items]	'	'	'	'	'
Fair Value, Option, Changes in Fair Value, Gain (Loss)	117,000,000	113,000,000	526,000,000	-441,000,000	'
Debt securities with Fair Value Option Elected	'	'	'	'	'
Fair Value Disclosures [Line Items]	'	'	'	'	'
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$156,000,000	($28,000,000)	($22,000,000)	($13,000,000)	'

Fair_Value_Disclosures_Assets_

Fair Value Disclosures - Assets and Liabilities on Our Consolidated Balance Sheets Measured at Fair Value on a Recurring Basis (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Mortgage Loans [Abstract]	'	'
Mortgage loans, held for sale, at fair value	$7,719,000,000	$8,727,000,000
Derivative Assets Net [Abstract]	'	'
Derivative Assets	897,000,000	1,063,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	1,930,000,000	180,000,000
Net Cash Pledged As Collateral	1,000,000,000	871,000,000
Net interest receivable (payable) of derivative assets/liabilities	-700,000,000	-600,000,000
Held by consolidated trusts	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	45,000,000	59,000,000
Freddie Mac parent	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	4,988,000,000	2,683,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	112,777,000,000	128,919,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	30,434,000,000	23,404,000,000
Total investments in securities	143,211,000,000	152,323,000,000
Mortgage Loans [Abstract]	'	'
Mortgage loans, held for sale, at fair value	7,719,000,000	8,727,000,000
Derivative Assets Net [Abstract]	'	'
Derivative Assets	897,000,000	1,063,000,000
Other Assets [Abstract]	'	'
Guarantee Assets	1,570,000,000	1,611,000,000
All other, at fair value	8,000,000	9,000,000
Total other assets	1,578,000,000	1,620,000,000
Total Assets at Fair value	153,405,000,000	163,733,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	1,930,000,000	180,000,000
Total liabilities carried at fair value on a recurring basis	6,963,000,000	2,922,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Held by consolidated trusts	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	45,000,000	59,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Freddie Mac parent	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	4,988,000,000	2,683,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Total Derivatives Before Netting Adjustments [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	9,067,000,000	14,231,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	10,431,000,000	13,627,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Interest Rate Swap [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	5,910,000,000	10,019,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	10,259,000,000	13,317,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Option-Based Derivatives [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	3,055,000,000	4,112,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	59,000,000	204,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other Derivative [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	102,000,000	100,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	113,000,000	106,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Netting Adjustments	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	-8,170,000,000	-13,168,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	-8,501,000,000	-13,447,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Mortage-related securities	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	112,777,000,000	128,919,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	21,275,000,000	16,768,000,000
Total investments in securities	134,052,000,000	145,687,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Freddie Mac	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	41,363,000,000	40,659,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	14,900,000,000	9,349,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Fannie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	10,526,000,000	10,797,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	6,238,000,000	7,180,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Ginnie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	210,000,000	167,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	17,000,000	98,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | CMBS	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	23,614,000,000	30,338,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Subprime	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	22,701,000,000	27,499,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Option ARM	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	5,707,000,000	6,574,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Alt-A and other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	5,513,000,000	8,706,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Obligations of states and political subdivisions	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	2,493,000,000	3,495,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Manufactured housing	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	650,000,000	684,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	120,000,000	141,000,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | US Treasury Securities [Member]	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	9,159,000,000	6,636,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	9,159,000,000	6,636,000,000
Total investments in securities	9,159,000,000	6,636,000,000
Mortgage Loans [Abstract]	'	'
Mortgage loans, held for sale, at fair value	0	0
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Other Assets [Abstract]	'	'
Guarantee Assets	0	0
All other, at fair value	0	0
Total other assets	0	0
Total Assets at Fair value	9,159,000,000	6,636,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Total liabilities carried at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Held by consolidated trusts	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Freddie Mac parent	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Total Derivatives Before Netting Adjustments [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Option-Based Derivatives [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Derivative [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Netting Adjustments	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortage-related securities	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Freddie Mac	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Fannie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Ginnie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | CMBS	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Subprime	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Option ARM	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Alt-A and other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Obligations of states and political subdivisions	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Manufactured housing	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	9,159,000,000	6,636,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	67,945,000,000	76,770,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	20,199,000,000	16,122,000,000
Total investments in securities	88,144,000,000	92,892,000,000
Mortgage Loans [Abstract]	'	'
Mortgage loans, held for sale, at fair value	7,719,000,000	8,727,000,000
Derivative Assets Net [Abstract]	'	'
Derivative Assets	9,031,000,000	14,220,000,000
Other Assets [Abstract]	'	'
Guarantee Assets	0	0
All other, at fair value	0	0
Total other assets	0	0
Total Assets at Fair value	104,894,000,000	115,839,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	10,384,000,000	13,291,000,000
Total liabilities carried at fair value on a recurring basis	15,417,000,000	14,505,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Held by consolidated trusts	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	45,000,000	59,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Freddie Mac parent	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	4,988,000,000	1,155,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Total Derivatives Before Netting Adjustments [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	9,031,000,000	14,220,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	10,384,000,000	13,291,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	5,910,000,000	10,009,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	10,259,000,000	13,022,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Option-Based Derivatives [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	3,055,000,000	4,112,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	59,000,000	201,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Derivative [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	66,000,000	99,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	66,000,000	68,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Netting Adjustments	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortage-related securities	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	20,199,000,000	16,122,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Freddie Mac	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	37,057,000,000	38,720,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	14,005,000,000	9,006,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Fannie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	10,420,000,000	10,666,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	6,061,000,000	6,959,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Ginnie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	206,000,000	155,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	17,000,000	24,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | CMBS	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	20,262,000,000	27,229,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Subprime	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Option ARM	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Alt-A and other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Obligations of states and political subdivisions	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Manufactured housing	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	116,000,000	133,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	44,832,000,000	52,149,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	1,076,000,000	646,000,000
Total investments in securities	45,908,000,000	52,795,000,000
Mortgage Loans [Abstract]	'	'
Mortgage loans, held for sale, at fair value	0	0
Derivative Assets Net [Abstract]	'	'
Derivative Assets	36,000,000	11,000,000
Other Assets [Abstract]	'	'
Guarantee Assets	1,570,000,000	1,611,000,000
All other, at fair value	8,000,000	9,000,000
Total other assets	1,578,000,000	1,620,000,000
Total Assets at Fair value	47,522,000,000	54,426,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	47,000,000	336,000,000
Total liabilities carried at fair value on a recurring basis	47,000,000	1,864,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Held by consolidated trusts	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Freddie Mac parent	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	0	1,528,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Total Derivatives Before Netting Adjustments [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	36,000,000	11,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	47,000,000	336,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	10,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	295,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Option-Based Derivatives [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	3,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Derivative [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	36,000,000	1,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	47,000,000	38,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Netting Adjustments	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortage-related securities	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	44,832,000,000	52,149,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	1,076,000,000	646,000,000
Total investments in securities	45,908,000,000	52,795,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Freddie Mac	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	4,306,000,000	1,939,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	895,000,000	343,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Fannie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	106,000,000	131,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	177,000,000	221,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Ginnie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	4,000,000	12,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	74,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | CMBS	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	3,352,000,000	3,109,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Subprime	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	22,701,000,000	27,499,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Option ARM	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	5,707,000,000	6,574,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Alt-A and other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	5,513,000,000	8,706,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Obligations of states and political subdivisions	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	2,493,000,000	3,495,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Manufactured housing	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	650,000,000	684,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	4,000,000	8,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury Securities [Member]	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Total investments in securities	0	0
Mortgage Loans [Abstract]	'	'
Mortgage loans, held for sale, at fair value	0	0
Derivative Assets Net [Abstract]	'	'
Derivative Assets	-8,170,000,000	-13,168,000,000
Other Assets [Abstract]	'	'
Guarantee Assets	0	0
All other, at fair value	0	0
Total other assets	0	0
Total Assets at Fair value	-8,170,000,000	-13,168,000,000
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	-8,501,000,000	-13,447,000,000
Total liabilities carried at fair value on a recurring basis	-8,501,000,000	-13,447,000,000
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Held by consolidated trusts	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Freddie Mac parent	'	'
Liabilities, Fair Value Disclosure [Abstract]	'	'
Debt securities recorded at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Total Derivatives Before Netting Adjustments [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Interest Rate Swap [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Option-Based Derivatives [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Other Derivative [Member]	'	'
Derivative Assets Net [Abstract]	'	'
Derivative Assets	0	0
Derivative Liabilities Net [Abstract]	'	'
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Mortage-related securities	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Freddie Mac	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Fannie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Ginnie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | CMBS	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Subprime	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Option ARM	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Alt-A and other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Obligations of states and political subdivisions	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Manufactured housing	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | Other	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member] | US Treasury Securities [Member]	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	$0	$0

Fair_Value_Disclosures_Assets_1

Fair Value Disclosures - Assets and Liabilities on Our Consolidated Balance Sheets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other Debt, At Fair Value [Member]	'	'	'	'
Liabilities:	'	'	'	'
Begining Balance	$1,000	$1,508	$1,528	$2,187
Included in Earnings	0	31	-7	23
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized (gains) losses	0	31	-7	23
Purchases	0	0	0	0
Issues	0	500	0	500
Sales	0	0	0	0
Settlements, Net	-1,000	-8	-1,521	-679
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	0	2,031	0	2,031
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized (Gains) Losses Still Held - Liabilities	0	31	0	-15
Net Derivatives [Member]	'	'	'	'
Liabilities:	'	'	'	'
Begining Balance	58	343	325	47
Included in Earnings	-66	-96	-95	232
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized (gains) losses	-66	-96	-95	232
Purchases	0	0	0	0
Issues	0	2	0	6
Sales	0	0	0	0
Settlements, Net	19	2	62	-36
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	-2	-281	0
Ending Balance	11	249	11	249
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized (Gains) Losses Still Held - Liabilities	-49	-84	-30	200
Available-For-Sale Mortgage-Related Securities [Member]	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	46,901	55,378	52,149	54,995
Included in Earnings	-147	-135	-409	-155
Included in Other Comprehensive Income	1,376	1,070	3,322	6,725
Total realized and unrealized gains (losses)	1,229	935	2,913	6,570
Purchases	4,364	1,781	5,616	1,770
Issues	0	0	0	0
Sales	-6,137	-917	-12,988	-2,489
Settlements, net	-657	-2,124	-2,821	-6,368
Transfers into Level 3	45	0	5	0
Transfers out of Level 3	-913	-575	-42	0
Ending Balance	44,832	54,478	44,832	54,478
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	-166	-122	-687	-200
Available-For-Sale Mortgage-Related Securities [Member] | Freddie Mac	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	2,892	2,325	1,939	1,802
Included in Earnings	3	0	1	0
Included in Other Comprehensive Income	1	122	3	113
Total realized and unrealized gains (losses)	4	122	4	113
Purchases	4,364	1,781	5,567	1,780
Issues	0	0	0	0
Sales	-2,077	0	-3,086	0
Settlements, net	-34	-67	-79	-109
Transfers into Level 3	0	0	3	0
Transfers out of Level 3	-843	-575	-42	0
Ending Balance	4,306	3,586	4,306	3,586
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	0	0	0	0
Available-For-Sale Mortgage-Related Securities [Member] | Fannie Mae	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	136	143	131	163
Included in Earnings	0	0	0	0
Included in Other Comprehensive Income	-1	-1	-4	-3
Total realized and unrealized gains (losses)	-1	-1	-4	-3
Purchases	0	0	48	0
Issues	0	0	0	0
Sales	0	0	-55	0
Settlements, net	-4	-5	-15	-23
Transfers into Level 3	45	0	1	0
Transfers out of Level 3	-70	0	0	0
Ending Balance	106	137	106	137
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	0	0	0	0
Available-For-Sale Mortgage-Related Securities [Member] | Ginnie Mae	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	5	14	12	16
Included in Earnings	0	0	0	0
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized gains (losses)	0	0	0	0
Purchases	0	0	0	0
Issues	0	0	0	0
Sales	0	0	-6	0
Settlements, net	-1	-1	-3	-3
Transfers into Level 3	0	0	1	0
Transfers out of Level 3	0	0	0	0
Ending Balance	4	13	4	13
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	0	0	0	0
Available-For-Sale Mortgage-Related Securities [Member] | CMBS	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	3,326	3,239	3,109	3,429
Included in Earnings	0	0	0	0
Included in Other Comprehensive Income	41	-40	269	-216
Total realized and unrealized gains (losses)	41	-40	269	-216
Purchases	0	0	0	0
Issues	0	0	0	0
Sales	0	0	0	0
Settlements, net	-15	-5	-26	-19
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	3,352	3,194	3,352	3,194
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	0	0	0	0
Available-For-Sale Mortgage-Related Securities [Member] | Subprime	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	24,291	28,004	27,499	26,457
Included in Earnings	-53	-46	-456	-94
Included in Other Comprehensive Income	1,068	639	2,556	4,632
Total realized and unrealized gains (losses)	1,015	593	2,100	4,538
Purchases	0	0	0	0
Issues	0	0	0	0
Sales	-2,423	-46	-5,628	-346
Settlements, net	-182	-979	-1,270	-3,077
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	22,701	27,572	22,701	27,572
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	-125	-45	-582	-91
Available-For-Sale Mortgage-Related Securities [Member] | Option ARM	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	6,231	6,636	6,574	5,717
Included in Earnings	-12	-16	-41	-21
Included in Other Comprehensive Income	172	20	174	1,346
Total realized and unrealized gains (losses)	160	4	133	1,325
Purchases	0	0	0	0
Issues	0	0	0	0
Sales	-616	-38	-791	-38
Settlements, net	-68	-178	-209	-580
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	5,707	6,424	5,707	6,424
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	-39	-12	-72	-17
Available-For-Sale Mortgage-Related Securities [Member] | Alt-A and other	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	6,454	10,055	8,706	10,904
Included in Earnings	-85	-73	86	-52
Included in Other Comprehensive Income	96	353	232	980
Total realized and unrealized gains (losses)	11	280	318	928
Purchases	0	0	0	0
Issues	0	0	0	0
Sales	-1,021	-826	-3,409	-1,572
Settlements, net	69	-406	-102	-1,157
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	5,513	9,103	5,513	9,103
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	-2	-65	-33	-91
Available-For-Sale Mortgage-Related Securities [Member] | Obligations of states and political subdivisions	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	2,898	4,281	3,495	5,798
Included in Earnings	0	0	1	13
Included in Other Comprehensive Income	-1	-51	71	-173
Total realized and unrealized gains (losses)	-1	-51	72	-160
Purchases	0	0	1	-10
Issues	0	0	0	0
Sales	0	-7	-13	-533
Settlements, net	-404	-462	-1,062	-1,334
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	2,493	3,761	2,493	3,761
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	0	0	0	0
Available-For-Sale Mortgage-Related Securities [Member] | Manufactured housing	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	668	681	684	709
Included in Earnings	0	0	0	-1
Included in Other Comprehensive Income	0	28	21	46
Total realized and unrealized gains (losses)	0	28	21	45
Purchases	0	0	0	0
Issues	0	0	0	0
Sales	0	0	0	0
Settlements, net	-18	-21	-55	-66
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	650	688	650	688
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	0	0	0	-1
Trading Mortgage Related Securities [Member]	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	1,425	875	646	1,590
Included in Earnings	39	1	5	-109
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized gains (losses)	39	1	5	-109
Purchases	915	1,360	2,078	1,182
Issues	7	0	42	229
Sales	-443	-335	-1,550	-362
Settlements, net	-18	-13	-47	-64
Transfers into Level 3	15	0	0	0
Transfers out of Level 3	-864	-319	-98	-897
Ending Balance	1,076	1,569	1,076	1,569
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	40	-3	7	-112
Trading Mortgage Related Securities [Member] | Freddie Mac	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	1,252	597	343	1,165
Included in Earnings	41	9	26	-51
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized gains (losses)	41	9	26	-51
Purchases	915	1,360	2,064	1,177
Issues	7	0	42	229
Sales	-443	-335	-1,480	-360
Settlements, net	-13	-5	-33	-37
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	-864	-319	-67	-816
Ending Balance	895	1,307	895	1,307
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	42	5	30	-54
Trading Mortgage Related Securities [Member] | Fannie Mae	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	167	188	221	312
Included in Earnings	-2	-8	-20	-57
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized gains (losses)	-2	-8	-20	-57
Purchases	0	0	14	2
Issues	0	0	0	0
Sales	0	0	0	-2
Settlements, net	-3	-4	-7	-12
Transfers into Level 3	15	0	0	0
Transfers out of Level 3	0	0	-31	-67
Ending Balance	177	176	177	176
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	-2	-8	-20	-57
Trading Mortgage Related Securities [Member] | Ginnie Mae	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	0	81	74	92
Included in Earnings	0	0	0	-1
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized gains (losses)	0	0	0	-1
Purchases	0	0	0	3
Issues	0	0	0	0
Sales	0	0	-70	0
Settlements, net	0	-3	-4	-12
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	-4
Ending Balance	0	78	0	78
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	0	0	-2	-1
Trading Mortgage Related Securities [Member] | Other	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	6	9	8	21
Included in Earnings	0	0	-1	0
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized gains (losses)	0	0	-1	0
Purchases	0	0	0	0
Issues	0	0	0	0
Sales	0	0	0	0
Settlements, net	-2	-1	-3	-3
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	-10
Ending Balance	4	8	4	8
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	0	0	-1	0
Loans Receivable [Member]	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	'	11,696	'	14,238
Included in Earnings	'	0	'	0
Included in Other Comprehensive Income	'	0	'	0
Total realized and unrealized gains (losses)	'	0	'	0
Purchases	'	0	'	0
Issues	'	0	'	0
Sales	'	0	'	0
Settlements, net	'	0	'	0
Transfers into Level 3	'	0	'	0
Transfers out of Level 3	'	-11,696	'	-14,238
Ending Balance	'	0	'	0
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	'	0	'	0
Other Asset [Member]	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	1,599	1,297	1,620	1,143
Included in Earnings	-45	16	-147	29
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized gains (losses)	-45	16	-147	29
Purchases	0	0	0	0
Issues	142	156	290	484
Sales	0	0	0	-135
Settlements, net	-118	-27	-185	-79
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	1,578	1,442	1,578	1,442
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	-45	16	-146	6
Guarantee Asset [Member]	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	1,587	1,289	1,611	1,029
Included in Earnings	-41	14	-146	-2
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized gains (losses)	-41	14	-146	-2
Purchases	0	0	0	0
Issues	142	156	290	484
Sales	0	0	0	0
Settlements, net	-118	-27	-185	-79
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	1,570	1,432	1,570	1,432
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	-41	14	-145	-2
All Other Assets [Member]	'	'	'	'
Assets:	'	'	'	'
Beginning Balance	12	8	9	114
Included in Earnings	-4	2	-1	31
Included in Other Comprehensive Income	0	0	0	0
Total realized and unrealized gains (losses)	-4	2	-1	31
Purchases	0	0	0	0
Issues	0	0	0	0
Sales	0	0	0	-135
Settlements, net	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	8	10	8	10
Unrealized Gains (Losses) Still Held:	'	'	'	'
Unrealized Gains (Losses) Still Held - Assets	($4)	$2	($1)	$8

Fair_Value_Disclosures_Assets_2

Fair Value Disclosures - Assets on Our Consolidated Balance Sheets Measured at Fair Value on a Non-Recurring Basis (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
Assets, Fair Value Disclosure [Abstract]	'	'
Carrying Amount Of REO Written Down To Fair Value	$1,200,000,000	$1,700,000,000
Estimated Cost To Sell	83,000,000	118,000,000
Fair Value, Inputs, Level 1 [Member]	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Mortgage loans	0	0
REO, net	0	0
Total Assets at Fair value	0	0
Fair Value, Inputs, Level 2 [Member]	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Mortgage loans	0	0
REO, net	0	0
Total Assets at Fair value	0	0
Fair Value, Inputs, Level 3 [Member]	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Mortgage loans	9,265,000,000	515,000,000
REO, net	1,259,000,000	1,837,000,000
Total Assets at Fair value	10,524,000,000	2,352,000,000
Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Mortgage loans	9,265,000,000	515,000,000
REO, net	1,259,000,000	1,837,000,000
Total Assets at Fair value	$10,524,000,000	$2,352,000,000

Fair_Value_Disclosures_Quantit

Fair Value Disclosures - Quantitative Information about Recurring Level 3 Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	112,777,000,000	128,919,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	30,434,000,000	23,404,000,000
Investments, Fair Value Disclosure	143,211,000,000	152,323,000,000
Other assets:	'	'
Guarantee Assets Fair Value Disclosure	1,570,000,000	1,611,000,000
All Other Assets Fair Value Disclosure	8,000,000	9,000,000
Total other assets	1,578,000,000	1,620,000,000
Net Derivative Asset	'	-883,000,000
Liabilities [Abstract]	'	'
Net Derivative Liability	1,033,000,000	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Other Debt, At Fair Value [Member]	'	'
Liabilities [Abstract]	'	'
Other debt at fair value	'	2,683,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Mortgage-related securities	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	112,777,000,000	128,919,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	21,275,000,000	16,768,000,000
Investments, Fair Value Disclosure	134,052,000,000	145,687,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Freddie Mac	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	41,363,000,000	40,659,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	14,900,000,000	9,349,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Fannie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	10,526,000,000	10,797,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	6,238,000,000	7,180,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Ginnie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	210,000,000	167,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	17,000,000	98,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | CMBS	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	23,614,000,000	30,338,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Subprime	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	22,701,000,000	27,499,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Option ARM	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	5,707,000,000	6,574,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Alt-A and other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	5,513,000,000	8,706,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Obligations of states and political subdivisions	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	2,493,000,000	3,495,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Manufactured housing	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	650,000,000	684,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Other	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	120,000,000	141,000,000
Fair Value, Inputs, Level 3 [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	44,832,000,000	52,149,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	1,076,000,000	646,000,000
Investments, Fair Value Disclosure	45,908,000,000	52,795,000,000
Other assets:	'	'
Guarantee Assets Fair Value Disclosure	1,570,000,000	1,611,000,000
All Other Assets Fair Value Disclosure	8,000,000	9,000,000
Total other assets	1,578,000,000	1,620,000,000
Fair Value, Inputs, Level 3 [Member] | Other Debt, At Fair Value [Member]	'	'
Liabilities [Abstract]	'	'
Other debt at fair value	'	1,528,000,000
Fair Value, Inputs, Level 3 [Member] | Other Debt, At Fair Value [Member] | Median of External Sources [Member]	'	'
Liabilities [Abstract]	'	'
Other debt at fair value	'	528,000,000
Fair Value, Inputs, Level 3 [Member] | Other Debt, At Fair Value [Member] | Single External Source [Member]	'	'
Liabilities [Abstract]	'	'
Other debt at fair value	'	1,000,000,000
Fair Value, Inputs, Level 3 [Member] | Other Debt, At Fair Value [Member] | Weighted Average [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	100
Fair Value, Inputs, Level 3 [Member] | Other Debt, At Fair Value [Member] | Weighted Average [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	100
Fair Value, Inputs, Level 3 [Member] | Other Debt, At Fair Value [Member] | Minimum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	100
Fair Value, Inputs, Level 3 [Member] | Other Debt, At Fair Value [Member] | Minimum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	100
Fair Value, Inputs, Level 3 [Member] | Other Debt, At Fair Value [Member] | Maximum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	100.1
Fair Value, Inputs, Level 3 [Member] | Other Debt, At Fair Value [Member] | Maximum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	100
Fair Value, Inputs, Level 3 [Member] | Net Derivatives [Member]	'	'
Liabilities [Abstract]	'	'
Net Derivative Liability	11,000,000	325,000,000
Fair Value, Inputs, Level 3 [Member] | Net Derivatives [Member] | Single External Source [Member]	'	'
Liabilities [Abstract]	'	'
Net Derivative Liability	'	283,000,000
Fair Value, Inputs, Level 3 [Member] | Net Derivatives [Member] | Discounted Cash Flows [Member]	'	'
Liabilities [Abstract]	'	'
Net Derivative Liability	'	37,000,000
Fair Value, Inputs, Level 3 [Member] | Net Derivatives [Member] | Other	'	'
Liabilities [Abstract]	'	'
Net Derivative Liability	11,000,000	5,000,000
Fair Value, Inputs, Level 3 [Member] | Net Derivatives [Member] | Weighted Average [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	0.8
Fair Value, Inputs, Level 3 [Member] | Net Derivatives [Member] | Minimum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	0.8
Fair Value, Inputs, Level 3 [Member] | Net Derivatives [Member] | Maximum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	0.8
Fair Value, Inputs, Level 3 [Member] | Mortgage-related securities	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	44,832,000,000	52,149,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	1,076,000,000	646,000,000
Investments, Fair Value Disclosure	45,908,000,000	52,795,000,000
Fair Value, Inputs, Level 3 [Member] | Freddie Mac	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	4,306,000,000	1,939,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	895,000,000	343,000,000
Fair Value, Inputs, Level 3 [Member] | Freddie Mac | Risk Metric [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	1,966,000,000	1,547,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	110,000,000	'
Fair Value, Inputs, Level 3 [Member] | Freddie Mac | Single External Source [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	'	133,000,000
Fair Value, Inputs, Level 3 [Member] | Freddie Mac | Discounted Cash Flows [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	1,781,000,000	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	628,000,000	297,000,000
Fair Value, Inputs, Level 3 [Member] | Freddie Mac | Other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	559,000,000	259,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	157,000,000	46,000,000
Fair Value, Inputs, Level 3 [Member] | Fannie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	106,000,000	131,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	177,000,000	221,000,000
Fair Value, Inputs, Level 3 [Member] | Fannie Mae | Median of External Sources [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	43,000,000	26,000,000
Fair Value, Inputs, Level 3 [Member] | Fannie Mae | Single External Source [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	'	91,000,000
Fair Value, Inputs, Level 3 [Member] | Fannie Mae | Discounted Cash Flows [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	60,000,000	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	177,000,000	191,000,000
Fair Value, Inputs, Level 3 [Member] | Fannie Mae | Other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	3,000,000	14,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	'	30,000,000
Fair Value, Inputs, Level 3 [Member] | Ginnie Mae	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	4,000,000	12,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	0	74,000,000
Fair Value, Inputs, Level 3 [Member] | Ginnie Mae | Median of External Sources [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	'	6,000,000
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	'	74,000,000
Fair Value, Inputs, Level 3 [Member] | Ginnie Mae | Discounted Cash Flows [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	4,000,000	6,000,000
Fair Value, Inputs, Level 3 [Member] | CMBS	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	3,352,000,000	3,109,000,000
Fair Value, Inputs, Level 3 [Member] | CMBS | Risk Metric [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	369,000,000	'
Fair Value, Inputs, Level 3 [Member] | CMBS | Single External Source [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	2,446,000,000	2,942,000,000
Fair Value, Inputs, Level 3 [Member] | CMBS | Other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	537,000,000	167,000,000
Fair Value, Inputs, Level 3 [Member] | Subprime	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	22,701,000,000	27,499,000,000
Fair Value, Inputs, Level 3 [Member] | Subprime | Median of External Sources [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	21,170,000,000	25,367,000,000
Fair Value, Inputs, Level 3 [Member] | Subprime | Other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	1,531,000,000	2,132,000,000
Fair Value, Inputs, Level 3 [Member] | Option ARM	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	5,707,000,000	6,574,000,000
Fair Value, Inputs, Level 3 [Member] | Option ARM | Median of External Sources [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	4,342,000,000	4,995,000,000
Fair Value, Inputs, Level 3 [Member] | Option ARM | Single External Source [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	16,000,000	'
Fair Value, Inputs, Level 3 [Member] | Option ARM | Discounted Cash Flows [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	'	705,000,000
Fair Value, Inputs, Level 3 [Member] | Option ARM | Other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	1,349,000,000	874,000,000
Fair Value, Inputs, Level 3 [Member] | Alt-A and other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	5,513,000,000	8,706,000,000
Fair Value, Inputs, Level 3 [Member] | Alt-A and other | Median of External Sources [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	4,643,000,000	3,503,000,000
Fair Value, Inputs, Level 3 [Member] | Alt-A and other | Single External Source [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	'	4,028,000,000
Fair Value, Inputs, Level 3 [Member] | Alt-A and other | Other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	870,000,000	1,175,000,000
Fair Value, Inputs, Level 3 [Member] | Obligations of states and political subdivisions	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	2,493,000,000	3,495,000,000
Fair Value, Inputs, Level 3 [Member] | Obligations of states and political subdivisions | Median of External Sources [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	2,289,000,000	3,067,000,000
Fair Value, Inputs, Level 3 [Member] | Obligations of states and political subdivisions | Other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	204,000,000	428,000,000
Fair Value, Inputs, Level 3 [Member] | Manufactured housing	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	650,000,000	684,000,000
Fair Value, Inputs, Level 3 [Member] | Manufactured housing | Median of External Sources [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	'	577,000,000
Fair Value, Inputs, Level 3 [Member] | Manufactured housing | Single External Source [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	478,000,000	'
Fair Value, Inputs, Level 3 [Member] | Manufactured housing | Discounted Cash Flows [Member]	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	146,000,000	'
Fair Value, Inputs, Level 3 [Member] | Manufactured housing | Other	'	'
Available-For-Sale, at Fair Value:	'	'
Available-for-sale Securities, Fair Value Disclosure	26,000,000	107,000,000
Fair Value, Inputs, Level 3 [Member] | Other	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	4,000,000	8,000,000
Fair Value, Inputs, Level 3 [Member] | Other | Median of External Sources [Member]	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	3,000,000	'
Fair Value, Inputs, Level 3 [Member] | Other | Single External Source [Member]	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	'	7,000,000
Fair Value, Inputs, Level 3 [Member] | Other | Discounted Cash Flows [Member]	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	1,000,000	'
Fair Value, Inputs, Level 3 [Member] | Other | Other	'	'
Trading, at Fair Value:	'	'
Trading Securities, Fair Value Disclosure	'	1,000,000
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Freddie Mac | Weighted Average [Member] | Risk Metric [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
Effective Duration	'2 years 1 month 10 days	'2 years 5 months 9 days
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Freddie Mac | Weighted Average [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	99.3
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Freddie Mac | Weighted Average [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	0.37%	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Freddie Mac | Minimum [Member] | Risk Metric [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
Effective Duration	'11 months 16 days	'2 years 3 months
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Freddie Mac | Minimum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	99.3
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Freddie Mac | Minimum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	-1.46%	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Freddie Mac | Maximum [Member] | Risk Metric [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
Effective Duration	'8 years 10 months 2 days	'5 years 2 months 1 day
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Freddie Mac | Maximum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	99.3
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Freddie Mac | Maximum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	1.41%	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Fannie Mae | Weighted Average [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	110.2	104.7
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Fannie Mae | Weighted Average [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	110.5
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Fannie Mae | Weighted Average [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	0.91%	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Fannie Mae | Minimum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	107.9	104.1
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Fannie Mae | Minimum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	110.5
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Fannie Mae | Minimum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	-56.49%	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Fannie Mae | Maximum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	112.5	105.3
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Fannie Mae | Maximum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	110.5
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Fannie Mae | Maximum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	10.82%	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | CMBS | Weighted Average [Member] | Risk Metric [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
Effective Duration	'7 years 5 months 27 days	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | CMBS | Weighted Average [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	99	90.9
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | CMBS | Minimum [Member] | Risk Metric [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
Effective Duration	'5 years 8 months 1 day	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | CMBS | Minimum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	99	90.9
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | CMBS | Maximum [Member] | Risk Metric [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
Effective Duration	'10 years 15 days	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | CMBS | Maximum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	99	90.9
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Subprime | Weighted Average [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	73.1	68.7
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Subprime | Minimum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	70.4	64.5
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Subprime | Maximum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	75.8	73.8
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Option ARM | Weighted Average [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	68.3	64.4
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Option ARM | Weighted Average [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	51.1	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Option ARM | Weighted Average [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	'	7.29%
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Option ARM | Minimum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	65.7	60.8
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Option ARM | Minimum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	51.1	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Option ARM | Minimum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	'	4.61%
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Option ARM | Maximum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	71	67
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Option ARM | Maximum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	51.1	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Option ARM | Maximum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	'	9.44%
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Alt-A and other | Weighted Average [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	85.2	75.7
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Alt-A and other | Weighted Average [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	83.4
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Alt-A and other | Minimum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	83.8	72.5
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Alt-A and other | Minimum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	83.4
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Alt-A and other | Maximum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	86.5	79.1
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Alt-A and other | Maximum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	83.4
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Obligations of states and political subdivisions | Weighted Average [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	101.4	99.2
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Obligations of states and political subdivisions | Minimum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	101	98.7
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Obligations of states and political subdivisions | Maximum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	101.8	99.7
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Manufactured housing | Weighted Average [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	89.7
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Manufactured housing | Weighted Average [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	91	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Manufactured housing | Weighted Average [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	3.73%	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Manufactured housing | Minimum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	86.7
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Manufactured housing | Minimum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	91	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Manufactured housing | Minimum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	2.90%	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Manufactured housing | Maximum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	'	92.8
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Manufactured housing | Maximum [Member] | Single External Source [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	91	'
Fair Value, Inputs, Level 3 [Member] | Available-For-Sale Mortgage-Related Securities [Member] | Manufactured housing | Maximum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	6.40%	'
Fair Value, Inputs, Level 3 [Member] | Trading Mortgage Related Securities [Member] | Freddie Mac | Weighted Average [Member] | Risk Metric [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
Effective Duration	'1 year 4 months 28 days	'
Fair Value, Inputs, Level 3 [Member] | Trading Mortgage Related Securities [Member] | Freddie Mac | Weighted Average [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	2.68%	3.64%
Fair Value, Inputs, Level 3 [Member] | Trading Mortgage Related Securities [Member] | Freddie Mac | Minimum [Member] | Risk Metric [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
Effective Duration (Past Years)	'19 years 11 months 27 days	'
Fair Value, Inputs, Level 3 [Member] | Trading Mortgage Related Securities [Member] | Freddie Mac | Minimum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	-1.97%	-0.05%
Fair Value, Inputs, Level 3 [Member] | Trading Mortgage Related Securities [Member] | Freddie Mac | Maximum [Member] | Risk Metric [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
Effective Duration	'2 years 9 months 29 days	'
Fair Value, Inputs, Level 3 [Member] | Trading Mortgage Related Securities [Member] | Freddie Mac | Maximum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	97.48%	94.41%
Fair Value, Inputs, Level 3 [Member] | Trading Mortgage Related Securities [Member] | Fannie Mae | Weighted Average [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	4.27%	1.99%
Fair Value, Inputs, Level 3 [Member] | Trading Mortgage Related Securities [Member] | Fannie Mae | Minimum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	-0.97%	-22.57%
Fair Value, Inputs, Level 3 [Member] | Trading Mortgage Related Securities [Member] | Fannie Mae | Maximum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	20.39%	22.95%
Fair Value, Inputs, Level 3 [Member] | Other Asset [Member]	'	'
Other assets:	'	'
Total other assets	1,578,000,000	1,620,000,000
Fair Value, Inputs, Level 3 [Member] | Guarantee Asset [Member]	'	'
Other assets:	'	'
Guarantee Assets Fair Value Disclosure	1,570,000,000	1,611,000,000
Fair Value, Inputs, Level 3 [Member] | Guarantee Asset [Member] | Median of External Sources [Member]	'	'
Other assets:	'	'
Guarantee Assets Fair Value Disclosure	369,000,000	448,000,000
Fair Value, Inputs, Level 3 [Member] | Guarantee Asset [Member] | Discounted Cash Flows [Member]	'	'
Other assets:	'	'
Guarantee Assets Fair Value Disclosure	1,201,000,000	1,163,000,000
Fair Value, Inputs, Level 3 [Member] | Guarantee Asset [Member] | Weighted Average [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	18	19.2
Fair Value, Inputs, Level 3 [Member] | Guarantee Asset [Member] | Weighted Average [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	0.55%	0.53%
Fair Value, Inputs, Level 3 [Member] | Guarantee Asset [Member] | Minimum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	10.8	11.6
Fair Value, Inputs, Level 3 [Member] | Guarantee Asset [Member] | Minimum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	0.17%	0.16%
Fair Value, Inputs, Level 3 [Member] | Guarantee Asset [Member] | Maximum [Member] | Median of External Sources [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
External Pricing Source(s)	23.7	25.4
Fair Value, Inputs, Level 3 [Member] | Guarantee Asset [Member] | Maximum [Member] | Discounted Cash Flows [Member]	'	'
Fair Value Inputs, Quantitative Information [Abstract]	'	'
OAS	2.02%	2.02%
Fair Value, Inputs, Level 3 [Member] | All Other Assets [Member]	'	'
Other assets:	'	'
All Other Assets Fair Value Disclosure	8,000,000	9,000,000
Fair Value, Inputs, Level 3 [Member] | All Other Assets [Member] | Other	'	'
Other assets:	'	'
All Other Assets Fair Value Disclosure	8,000,000	9,000,000

Fair_Value_Disclosures_Fair_Va

Fair Value Disclosures Fair Value Disclosures - Quantitative Information about Non-Recurring Level 3 Fair Value Measurements (Details) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Reo Net At Fair Value [Member]

Reo Net At Fair Value [Member]

Reo Net At Fair Value [Member]

Reo Net At Fair Value [Member]

Reo Net At Fair Value [Member]

Reo Net At Fair Value [Member]

Reo Net At Fair Value [Member]

Reo Net At Fair Value [Member]

Mortgage loans [Member]

Mortgage loans [Member]

Reo Net At Fair Value [Member]

Reo Net At Fair Value [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

Internal Model [Member]

Internal Model [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Weighted Average [Member]

Weighted Average [Member]

Income Capitalization [Member]

Income Capitalization [Member]

Third-Party Appraisal [Member]

Third-Party Appraisal [Member]

Internal Model [Member]

Income Capitalization [Member]

Income Capitalization [Member]

Third-Party Appraisal [Member]

Third-Party Appraisal [Member]

Internal Model [Member]

Income Capitalization [Member]

Income Capitalization [Member]

Third-Party Appraisal [Member]

Third-Party Appraisal [Member]

Internal Model [Member]

Internal Model [Member]

Internal Model [Member]

Internal Model [Member]

Internal Model [Member]

Internal Model [Member]

Internal Model [Member]

Assets, Fair Value Disclosure [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Mortgage Loans Fair Value Disclosure

'

$9,265,000,000

$515,000,000

$9,265,000,000

$515,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$9,265,000,000

$515,000,000

$9,265,000,000

$515,000,000

'

'

Capitalization rates

'

'

'

'

'

6.00%

6.00%

'

'

'

9.00%

9.00%

'

'

'

7.00%

7.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property Value

'

'

'

'

'

'

'

9,000,000

4,000,000

'

'

'

44,000,000

44,000,000

'

'

'

33,000,000

27,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reo Net Fair Value Disclosure

'

1,259,000,000

1,837,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,259,000,000

1,837,000,000

'

'

'

'

'

'

1,259,000,000

1,837,000,000

'

'

1,259,000,000

1,837,000,000

Fair Value Inputs Historical Sale Proceeds

'

'

'

'

'

'

'

'

'

3,000

'

'

'

'

815,800

'

'

'

'

122,124

'

'

3,000

'

733,643

'

114,287

'

'

'

'

'

'

'

Fair Value Inputs Historical Average Sale Proceeds By State Per Property

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$17,500

'

$318,391

'

$105,508

'

'

'

'

'

'

Housing Sales Index

'

'

'

'

'

'

'

'

'

0.37%

'

'

'

'

3.05%

'

'

'

'

0.84%

'

'

0.37%

'

3.05%

'

0.84%

'

'

'

'

'

'

'

REO Disposition Severity Ratio

35.80%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair_Value_Disclosures_Fair_Va1

Fair Value Disclosures - Fair Value of Financial Instruments (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Mortgage loans:	'	'
Derivative Assets	$897	$1,063
Debt, net:	'	'
Derivative liabilities, net	1,930	180
Held by consolidated trusts	'	'
Debt, net:	'	'
Debt, Net	45	59
Freddie Mac parent	'	'
Debt, net:	'	'
Debt, Net	4,988	2,683
Carrying Amount	'	'
Financial Assets	'	'
Cash and Cash Equivalents	16,191	11,281
Restricted Cash and Cash Equivalents	6,264	12,265
Federal Funds Sold and Securities Purchased under Agreements to Resell	29,956	62,383
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	112,777	128,919
Trading, at fair value	30,434	23,404
Total investments in securities	143,211	152,323
Mortgage loans:	'	'
Mortgage loans	1,690,971	1,684,790
Derivative Assets	897	1,063
Guarantee Assets	1,570	1,611
Advances to lenders fair value disclosure	67	'
Total financial assets	1,889,127	1,925,716
Debt, net:	'	'
Debt, Net	1,903,551	1,940,751
Derivative liabilities, net	1,930	180
Guarantee obligation	1,561	1,522
Total Financial Liabilities	1,907,042	1,942,453
Carrying Amount | Held by consolidated trusts	'	'
Mortgage loans:	'	'
Mortgage loans	1,549,533	1,529,905
Debt, net:	'	'
Debt, Net	1,467,845	1,433,984
Carrying Amount | Freddie Mac parent	'	'
Mortgage loans:	'	'
Mortgage loans	141,438	154,885
Debt, net:	'	'
Debt, Net	435,706	506,767
Fair Value	'	'
Financial Assets	'	'
Cash and Cash Equivalents	16,191	11,281
Restricted Cash and Cash Equivalents	6,264	12,265
Federal Funds Sold and Securities Purchased under Agreements to Resell	29,956	62,383
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	112,777	128,919
Trading, at fair value	30,434	23,404
Total investments in securities	143,211	152,323
Mortgage loans:	'	'
Mortgage loans	1,695,557	1,645,952
Derivative Assets	897	1,063
Guarantee Assets	1,794	1,879
Advances to lenders fair value disclosure	67	'
Total financial assets	1,893,937	1,887,146
Debt, net:	'	'
Debt, Net	1,939,727	1,949,743
Derivative liabilities, net	1,930	180
Guarantee obligation	3,211	3,067
Total Financial Liabilities	1,944,868	1,952,990
Fair Value | Held by consolidated trusts	'	'
Mortgage loans:	'	'
Mortgage loans	1,557,168	1,507,742
Debt, net:	'	'
Debt, Net	1,496,915	1,436,898
Fair Value | Freddie Mac parent	'	'
Mortgage loans:	'	'
Mortgage loans	138,389	138,210
Debt, net:	'	'
Debt, Net	442,812	512,845
Fair Value | Level 1	'	'
Financial Assets	'	'
Cash and Cash Equivalents	16,191	11,281
Restricted Cash and Cash Equivalents	6,264	12,264
Federal Funds Sold and Securities Purchased under Agreements to Resell	0	0
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	0	0
Trading, at fair value	9,159	6,636
Total investments in securities	9,159	6,636
Mortgage loans:	'	'
Mortgage loans	0	0
Derivative Assets	0	0
Guarantee Assets	0	0
Advances to lenders fair value disclosure	0	'
Total financial assets	31,614	30,181
Debt, net:	'	'
Debt, Net	0	0
Derivative liabilities, net	0	0
Guarantee obligation	0	0
Total Financial Liabilities	0	0
Fair Value | Level 1 | Held by consolidated trusts	'	'
Mortgage loans:	'	'
Mortgage loans	0	0
Debt, net:	'	'
Debt, Net	0	0
Fair Value | Level 1 | Freddie Mac parent	'	'
Mortgage loans:	'	'
Mortgage loans	0	0
Debt, net:	'	'
Debt, Net	0	0
Fair Value | Level 2	'	'
Financial Assets	'	'
Cash and Cash Equivalents	0	0
Restricted Cash and Cash Equivalents	0	1
Federal Funds Sold and Securities Purchased under Agreements to Resell	29,956	62,383
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	67,945	76,770
Trading, at fair value	20,199	16,122
Total investments in securities	88,144	92,892
Mortgage loans:	'	'
Mortgage loans	1,370,749	1,274,194
Derivative Assets	9,031	14,220
Guarantee Assets	0	0
Advances to lenders fair value disclosure	67	'
Total financial assets	1,497,947	1,443,690
Debt, net:	'	'
Debt, Net	1,927,516	1,933,964
Derivative liabilities, net	10,384	13,291
Guarantee obligation	0	0
Total Financial Liabilities	1,937,900	1,947,255
Fair Value | Level 2 | Held by consolidated trusts	'	'
Mortgage loans:	'	'
Mortgage loans	1,353,333	1,258,049
Debt, net:	'	'
Debt, Net	1,494,687	1,434,208
Fair Value | Level 2 | Freddie Mac parent	'	'
Mortgage loans:	'	'
Mortgage loans	17,416	16,145
Debt, net:	'	'
Debt, Net	432,829	499,756
Fair Value | Level 3	'	'
Financial Assets	'	'
Cash and Cash Equivalents	0	0
Restricted Cash and Cash Equivalents	0	0
Federal Funds Sold and Securities Purchased under Agreements to Resell	0	0
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	44,832	52,149
Trading, at fair value	1,076	646
Total investments in securities	45,908	52,795
Mortgage loans:	'	'
Mortgage loans	324,808	371,758
Derivative Assets	36	11
Guarantee Assets	1,794	1,879
Advances to lenders fair value disclosure	0	'
Total financial assets	372,546	426,443
Debt, net:	'	'
Debt, Net	12,211	15,779
Derivative liabilities, net	47	336
Guarantee obligation	3,211	3,067
Total Financial Liabilities	15,469	19,182
Fair Value | Level 3 | Held by consolidated trusts	'	'
Mortgage loans:	'	'
Mortgage loans	203,835	249,693
Debt, net:	'	'
Debt, Net	2,228	2,690
Fair Value | Level 3 | Freddie Mac parent	'	'
Mortgage loans:	'	'
Mortgage loans	120,973	122,065
Debt, net:	'	'
Debt, Net	9,983	13,089
Fair Value | Netting Adjustments	'	'
Financial Assets	'	'
Cash and Cash Equivalents	0	0
Restricted Cash and Cash Equivalents	0	0
Federal Funds Sold and Securities Purchased under Agreements to Resell	0	0
Investments in Securities [Abstract]	'	'
Available-for-sale, at fair value	0	0
Trading, at fair value	0	0
Total investments in securities	0	0
Mortgage loans:	'	'
Mortgage loans	0	0
Derivative Assets	-8,170	-13,168
Guarantee Assets	0	0
Advances to lenders fair value disclosure	0	'
Total financial assets	-8,170	-13,168
Debt, net:	'	'
Debt, Net	0	0
Derivative liabilities, net	-8,501	-13,447
Guarantee obligation	0	0
Total Financial Liabilities	-8,501	-13,447
Fair Value | Netting Adjustments | Held by consolidated trusts	'	'
Mortgage loans:	'	'
Mortgage loans	0	0
Debt, net:	'	'
Debt, Net	0	0
Fair Value | Netting Adjustments | Freddie Mac parent	'	'
Mortgage loans:	'	'
Mortgage loans	0	0
Debt, net:	'	'
Debt, Net	$0	$0

Fair_Value_Disclosures_Differe

Fair Value Disclosures - Difference between Fair Value and Unpaid Principal Balance for Certain Financial Instruments with Fair Value Option Elected (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]	'	'
Loans Held For Sale, Fair Value	$7,719	$8,727
Loans Held For Sale, Unpaid Principal Balance, With Fair Value Option Elected	7,615	8,721
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables	104	6
Long-Term Debt, Fair Value	4,988	2,683
Long-Term Debt, Unpaid Principal Balance, with Fair Value Option Elected	4,901	2,635
Fair Value, Option, Aggregate Differences, Long-term Debt Instruments	$87	$48

Legal_Contingencies_Details

Legal Contingencies (Details) (USD $)	9 Months Ended	0 Months Ended					0 Months Ended
	Sep. 30, 2014	Sep. 15, 2014	Dec. 16, 2011	14-May-10	Dec. 31, 2012	Dec. 31, 2011	Mar. 14, 2014	Sep. 30, 2014
		Deloitte & Touche LLP	Related Third Party Litigation And Indemnification Requests	Unasserted claim	IRS Litigation	IRS Litigation	LIBOR Lawsuit	Litigation Concerning the Purchase Agreement
			SEC litigation	TBW Bankruptcy, Underwriters			numberofdefendants	Arrowood lawsuit
			numberofdefendants
Loss Contingencies [Line Items]	'	'	'	'	'	'	'	'
Legal fees and expenses of former officers for indemnification obligations	$11,000,000	'	'	'	'	'	'	'
Number of defendants	'	'	3	'	'	'	16	'
Preferred Stock, Value, Outstanding	'	'	'	'	'	'	'	42,297,500
Amount of mortgage bankers bonds to be rescinded	'	'	'	90,000,000	'	'	'	'
Loss Contingency, Damages Sought, Value	'	1,300,000,000	'	'	'	'	'	'
Amount of additional income taxes and penalties assessed in statutory notices 1998 To 2007	'	'	'	'	'	3,000,000,000	'	'
Amount of tax paid in the statutory notices received for the years 2006 and 2007	'	'	'	'	36,000,000	'	'	'
Unrecognized tax benefits	$0	'	'	'	$0	'	'	'

Regulatory_Capital_Details

Regulatory Capital (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2008
Mortgage Banking [Abstract]	'	'	'	'	'	'
Number of days of net worth deficit requiring FHFA to place us into receivership	'60 days	'	'	'	'	'
Expected Draw Request To Treasury Under Purchase Agreement	$0	'	'	$0	'	'
Aggregate Funding Received From Treasury Under Purchase Agreement	71,300,000,000	'	'	71,300,000,000	'	'
Initial liquidation preference of Senior Preferred Stock	'	'	'	'	'	1,000,000,000
Cash amount received as a result of issuing the initial liquidation preference	'	'	'	'	'	0
Cash dividends paid on senior preferred stock	$1,900,000,000	$4,500,000,000	$10,400,000,000	$16,824,000,000	$17,155,000,000	'

Regulatory_Capital_Regulatory_

Regulatory Capital Regulatory Capital - Net Worth and Minimum Capital (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Net Worth and Minimum Capital [Abstract]	'	'	'	'
GAAP net worth (deficit)	$5,186	$12,835	$33,436	$8,827
Core capital (deficit)	-68,856	-59,495	'	'
Minimum capital requirement	19,711	21,404	'	'
Minimum capital surplus (deficit)	($88,567)	($80,899)	'	'

Selected_Financial_Statement_L2

Selected Financial Statement Line Items - Significant Components of Other Income (Loss) on Our Consolidated Statements of Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other income (loss):	'	'	'	'
Non-agency mortgage-related securities settlements	$1,187	$549	$6,084	$660
Gains (losses) on mortgage loans	168	114	383	-440
Other	441	328	862	919
Total other income (loss)	$1,796	$991	$7,329	$1,139

Selected_Financial_Statement_L3

Selected Financial Statement Line Items - Significant Components of Other Assets and Other Liabilities on Our Consolidated Balance Sheets (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Other assets:	'	'
Accounts and other receivables	$3,073	$4,367
Current income tax receivable	2,014	1,316
Guarantee asset	1,570	1,611
All other	1,206	1,245
Total other assets	7,863	8,539
Other liabilities:	'	'
Servicer liabilities	1,916	2,277
Guarantee obligation	1,561	1,522
Accounts payable and accrued expenses	886	886
All other	1,537	807
Total other liabilities	$5,900	$5,492