10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2012

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from              to             

Commission File No. 000-51401

FEDERAL HOME LOAN BANK OF CHICAGO

(Exact name of registrant as specified in its charter)

Federally chartered corporation	36-6001019
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
200 East Randolph Drive Chicago, IL	60601
(Address of principal executive offices)	(Zip Code)

Registrant's telephone number, including area code: (312) 565-5700

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x  No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes  x  No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one)

Large accelerated filer   o	Accelerated filer  o
Non-accelerated filer   x  (Do not check if a smaller reporting company)	Smaller reporting company   o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes  o  No  x

There were 17,206,500 shares of registrant's capital stock outstanding as of October 31, 2012.

1

TABLE OF CONTENTS

PART I - FINANCIAL INFORMATION		3
Item 1.	Financial Statements (unaudited).	3
	Statements of Condition	3
	Statements of Income	4
	Statements of Comprehensive Income	5
	Statements of Capital	6
	Condensed Statements of Cash Flows	7
	Note 1 - Background and Basis of Presentation	8
	Note 2 - Summary of Significant Accounting Policies	9
	Note 3 - Recently Issued but Not Yet Adopted Accounting Standards	9
	Note 4 - Interest Income and Interest Expense	10
	Note 5 - Investment Securities	11
	Note 6 - Advances	20
	Note 7 - MPF Loans	21
	Note 8 - Allowance for Credit Losses	22
	Note 9 - Derivatives and Hedging Activities	26
	Note 10 - Consolidated Obligations	30
	Note 11 - Subordinated Notes	31
	Note 12 - Regulatory Actions	31
	Note 13 - Capital Stock and Mandatorily Redeemable Capital Stock (MRCS)	32
	Note 14 - Accumulated Other Comprehensive Income (Loss)	34
	Note 15 - Fair Value Accounting	35
	Note 16 - Commitments and Contingencies	43
	Note 17 - Transactions with Members and Other FHLBs	43
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations.	44
Item 3.	Quantitative and Qualitative Disclosures about Market Risk.	73
Item 4.	Controls and Procedures.	75
PART II - OTHER INFORMATION		76
Item 1.	Legal Proceedings.	76
Item 1A.	Risk Factors.	76
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds.	77
Item 3.	Defaults upon Senior Securities.	77
Item 4.	Mine Safety Disclosures.	77
Item 5.	Other Information.	77
Item 6.	Exhibits.	77
Glossary of Terms		78

2

Federal Home Loan Bank of Chicago

PART I - FINANCIAL INFORMATION

Item 1.    Financial Statements (unaudited).

Statements of Condition (unaudited)

(Dollars in millions, except capital stock par value)

	September 30, 2012		December 31, 2011
Assets
Cash and due from banks	$	25	$	1,002
Federal Funds sold	1,948		950
Securities purchased under agreements to resell	3,049		825
Investment securities -
Trading, $0 and $15 pledged	2,685		2,935
Available-for-sale, $0 and $14 pledged	23,829		24,316
Held-to-maturity a, $0 and $490 pledged	9,790		11,477
Total investment securities	36,304		38,728
Advances, $9 and $9 carried at fair value	13,531		15,291
MPF Loans held in portfolio, net of allowance for credit losses of $(44) and $(45)	11,266		14,118
Accrued interest receivable	127		153
Derivative assets	55		40
Software and equipment, net of accumulated amortization/depreciation   of $(153) and $(143)	34		38
Other assets	105		110
Total assets	$	66,444	$	71,255
Liabilities
Deposits - Interest bearing	$	655	$	535
- Non-interest bearing	75		113
Total deposits	730		648
Securities sold under agreements to repurchase	—		400
Consolidated obligations, net -
Discount notes, $2,258 and $11,466 carried at fair value	27,231		25,404
Bonds, $855 and $2,631 carried at fair value	33,366		39,880
Total consolidated obligations, net	60,597		65,284
Accrued interest payable	289		203
Mandatorily redeemable capital stock	10		4
Derivative liabilities	119		206
Affordable Housing Program assessment payable	72		61
Other liabilities	295		157
Subordinated notes	1,000		1,000
Total liabilities	63,112		67,963
Commitments and contingencies - Note 16
Capital
Class B-1 Capital stock - putable $100 par value - 1 million shares issued and outstanding at September 30, 2012	86
Class B-2 Capital stock - putable $100 par value - 16 million shares issued and outstanding at September 30, 2012	1,616
Total Capital stock - putable $100 par value - 17 million shares issued and outstanding at September 30, 2012, and 24 million shares issued and outstanding at December 31, 2011	1,702		2,402
Retained earnings - unrestricted	1,506		1,289
- restricted	87		32
Total retained earnings	1,593		1,321
Accumulated other comprehensive income (loss)	37		(431		)
Total capital	3,332		3,292
Total liabilities and capital	$	66,444	$	71,255

^a    Fair value of held-to-maturity securities: $10,690 and $12,131.

The accompanying notes are an integral part of these financial statements (unaudited).

3

Federal Home Loan Bank of Chicago

Statements of Income (unaudited)

(Dollars in millions)

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Interest income	$	466		$	559		$	1,476		$	1,714
Interest expense	326			425			1,039			1,325
Net interest income before provision for credit losses	140			134			437			389
Provision for credit losses	—			3			8			12
Net interest income	140			131			429			377
Non-interest gain (loss) on -
Total other-than-temporary impairment	—			(7		)	(2		)	(16		)
Net non-credit portion reclassified to (from) statements of comprehensive income	—			(7		)	(13		)	(41		)
Net other-than-temporary impairment (OTTI) charges, credit portion	—			(14		)	(15		)	(57		)
Trading securities	(10		)	(18		)	(35		)	(40		)
Derivatives and hedging activities	(1		)	95			2			77
Instruments held under fair value option	(6		)	—			2			(13		)
Early extinguishment of debt	—			(21		)	—			(21		)
Other, net	5			19			13			25
Total non-interest gain (loss)	(12		)	61			(33		)	(29		)
Non-interest expense -
Compensation and benefits	14			18			45			47
Other operating expenses	9			8			25			25
FHFA	2			2			6			8
Office of Finance	—			1			2			3
Other	3			7			12			18
Total non-interest expense	28			36			90			101
Income before assessments	100			156			306			247
Assessments -
Affordable Housing Program	10			15			31			22
Resolution Funding Corporation	—			—			—			17
Total assessments	10			15			31			39
Net income	$	90		$	141		$	275		$	208

The accompanying notes are an integral part of these financial statements (unaudited).

4

Federal Home Loan Bank of Chicago

Statements of Comprehensive Income (unaudited)

(Dollars in millions)

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Net income	$	90		$	141		$	275		$	208
Other comprehensive income -
Net unrealized gain (loss) on available-for-sale securities
Unrealized gains (losses)	265			311			477			468
Total net unrealized gain (loss) on available-for-sale securities	265			311			477			468
Net unrealized gain (loss) on held-to-maturity securities a
Reclassification to net income	—			2			2			3
Total net unrealized gain (loss) on held-to-maturity securities	—			2			2			3
Non-credit OTTI on available-for-sale securities
Net change in fair value	10			(3		)	15			2
Reclassification of net non-credit portion to (from) statements of income	—			—			—			6
Total non-credit OTTI on available-for-sale securities	10			(3		)	15			8
Non-credit OTTI on held-to-maturity securities
Reclassification of net non-credit portion to (from) statements of income	—			7			13			35
Accretion of non-credit portion to HTM asset	18			29			55			96
Total non-credit OTTI on held-to-maturity securities	18			36			68			131
Net unrealized gain (loss) on hedging activities
Unrealized gains (losses)	(33		)	(400		)	(91		)	(453		)
Reclassification of net realized (gains) losses to net income	(1		)	(23		)	(2		)	(47		)
Total net unrealized gain (loss) on hedging activities	(34		)	(423		)	(93		)	(500		)
Post retirement plans - reclassification to net income	(1		)	—			(1		)	—
Total other comprehensive income	258			(77		)	468			110
Total comprehensive income	$	348		$	64		$	743		$	318

^a  This item relates to the amortization of fair value adjustments from a 2007 transfer at fair value of available-for-sale securities to held-to-maturity securities.

The accompanying notes are an integral part of these financial statements (unaudited).

5

Federal Home Loan Bank of Chicago

Statements of Capital (unaudited)

(Dollars and shares in millions)

	Capital Stock -   Putable							Retained Earnings								Accumulated Other Comprehensive Income (Loss)			Total Capital
	Shares a			Par Value				Unrestricted			Restricted		Total
Balance, December 31, 2010	23			$	2,333			$	1,099		$	—	$	1,099		$	(483	)	$	2,949
Comprehensive income								180			28		208			110			318
Proceeds from issuance of capital stock	1			61															61
Capital stock reclassified to mandatorily redeemable capital stock	—			(4		)													(4		)
Cash dividends on capital stock								(2		)	—		(2		)				(2		)
Balance, September 30, 2011	24			$	2,390			$	1,277		$	28	$	1,305		$	(373	)	$	3,322
Balance, December 31, 2011	24		b	$	2,402		b	$	1,289		$	32	$	1,321		$	(431	)	$	3,292
Comprehensive income								220			55		275			468			743
Proceeds from issuance of capital stock	1			144															144
Repurchases of capital stock	(8	)		(790		)													(790		)
Capital stock reclassified to mandatorily redeemable capital stock	—			(54		)													(54		)
Cash dividends on capital stock								(3		)	—		(3		)				(3		)
Balance, September 30, 2012	17			$	1,702			$	1,506		$	87	$	1,593		$	37		$	3,332

^a  Excludes outstanding shares reclassified to mandatorily redeemable capital stock.

^b  On January 1, 2012 Capital Stock, shares and par value, were converted to B-1 and B-2 shares under our new Capital Plan.

The accompanying notes are an integral part of these financial statements (unaudited).

6

Federal Home Loan Bank of Chicago

Condensed Statements of Cash Flows (unaudited)

(Dollars in millions)

	Nine months ended September 30,	2012			2011
Operating	Net cash provided by (used in) operating activities	$	230		$	(700	)
Investing	Net change Federal Funds sold	(998		)	1,058
	Net change securities purchased under agreements to resell	(2,224		)	3,575
	Advances -
	Principal collected	154,336			71,676
	Issued	(152,564		)	(67,079		)
	MPF Loans held in portfolio-
	Principal collected	2,841			3,066
	Purchases	(54		)	(40		)
	Trading securities -
	Proceeds from maturities, sales, and paydowns	1,976			1,820
	Purchases	(1,648		)	(4,407		)
	Held-to-maturity securities a-
	Short-term held-to-maturity securities, net	266			467
	Proceeds from maturities	1,542			1,785
	Purchases	(19		)	(1,042		)
	Available-for-sale securities -
	Proceeds from maturities and sales	1,093			891
	Purchases	—			(70		)
	Proceeds from sale of foreclosed assets	53			52
	Capital expenditures for software and equipment	(6		)	(4		)
	Net cash provided by (used in) investing activities	4,594			11,748
Financing	Net change deposits	82			(101		)
	Maturities of securities sold under agreements to repurchase	(400		)	—
	Net proceeds from issuance of consolidated obligations -
	Discount notes	354,372			616,603
	Bonds	37,532			30,246
	Payments for maturing and retiring consolidated obligations -
	Discount notes	(352,547		)	(615,186		)
	Bonds	(44,082		)	(42,572		)
	Net proceeds (payments) on derivative contracts with financing element	(61		)	(100		)
	Proceeds from issuance of capital stock	144			61
	Repurchase or redemption of capital stock	(790		)	—
	Redemptions of mandatorily redeemable capital stock	(48		)	(4		)
	Cash dividends paid	(3		)	(2		)
	Net cash provided by (used in) financing activities	(5,801		)	(11,055		)
	Net increase (decrease) in cash and due from banks	(977		)	(7		)
	Cash and due from banks at beginning of year	1,002			282
	Cash and due from banks at end of period	$	25		$	275
Supplemental	Capital stock reclassified to mandatorily redeemable capital stock	$	54		$	4
	Transfer of MPF Loans to real estate owned	76			54

^a  Short-term held-to-maturity securities, net consist of investment securities that have a maturity of less than 90 days when purchased. Proceeds from maturities and purchases consist of securities with maturities of 90 days or more.

The accompanying notes are an integral part of these financial statements (unaudited).

7

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 1 – Background and Basis of Presentation

The Federal Home Loan Bank of Chicago ^a is a federally chartered corporation and one of 12 Federal Home Loan Banks (the FHLBs) that, with the Office of Finance, comprise the Federal Home Loan Bank System (the System).  The FHLBs are government-sponsored enterprises (GSE) of the United States of America and were organized under the Federal Home Loan Bank Act of 1932, as amended (FHLB Act), in order to improve the availability of funds to support home ownership.  We are supervised and regulated by the Federal Housing Finance Agency (FHFA), an independent federal agency in the executive branch of the United States government. We provide credit to members principally in the form of secured loans called advances. We also provide liquidity for home mortgage loans to members approved as Participating Financial Institutions (PFIs) through the Mortgage Partnership Finance^® (MPF^®) Program ^b.

Our accounting and financial reporting policies conform to generally accepted accounting principles in the United States of America (GAAP). The preparation of financial statements in conformity with GAAP requires the extensive use of management's estimates and assumptions that affect the reported amounts of assets and liabilities, as well as the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses. Actual results could differ from those estimates. Prior period amounts have been reclassified to conform to the current period presentation. We adopted the new FASB guidance on the presentation of comprehensive income that was issued in June of 2011 effective January 1, 2012. Specifically, we adopted on a retrospective basis and elected to present comprehensive income in two separate consecutive statements. The new guidance did not change the items that are currently reported in our other comprehensive income or when an item of other comprehensive income must be reclassified into net income. As a result, the effect of the new guidance on our financial statements was limited to how we present our financial statements. In the opinion of management, all normal recurring adjustments have been included for a fair statement of this interim financial information. These unaudited financial statements should be read in conjunction with the audited financial statements for the year ended December 31, 2011, included in our Annual Report on Form 10-K (2011 Form 10-K) filed with the SEC.

Our investments in variable interest entities (VIEs) include, but are not limited to, senior interests in private label mortgage-backed securities (MBS) and Federal Family Education Loan Program (FFELP) asset-backed securities (ABS). We have evaluated these VIEs for the periods presented, and determined that we are not required to apply consolidation accounting since we are not the primary beneficiary in any of these VIEs. Excluding contractually required amounts, we have not provided financial or other support (explicitly or implicitly) during the periods presented in our financial statements. Further, we do not intend to provide such support in the future. The carrying amounts and classification of the assets that relate to these VIEs are shown in investment securities in our statements of condition. We have no liabilities related to these VIEs. Our maximum loss exposure for our VIEs is limited to the carrying value.

For purposes of the statements of cash flows, we consider only cash and due from banks as cash and cash equivalents.

^a  Unless otherwise specified, references to we, us, our, and the Bank are to the Federal Home Loan Bank of Chicago.

^b  “Mortgage Partnership Finance”, “MPF”, and “MPF Xtra” are registered trademarks of the Federal Home Loan Bank of Chicago.

8

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 2 – Summary of Significant Accounting Policies

Unless otherwise noted below, our Summary of Significant Accounting Policies can be found in our 2011 Form 10-K starting on page F-10. The following accounting policies have been revised or updated during 2012:

Changes in Accounting Policies

Fair Value Measurement and Disclosures

In May of 2011, the FASB issued amendments to achieve common fair value measurement and disclosure requirements in U.S. GAAP and International Financial Reporting Standards (IFRS). The amendments serve to clarify the FASB's intent about the application of existing fair value measurement and disclosure requirements, or change a particular principle or requirement for measuring fair value or disclosing information about fair value measurements. The amendments became effective on a prospective basis January 1, 2012. Upon adoption, we elected the “portfolio exception” for purposes of determining the nonperformance risk adjustment, if any, to the fair value of our derivative instruments. The “portfolio exception” allows for the nonperformance risk adjustment to the fair value of our derivative assets and derivative liabilities to be measured based on the net counterparty position (i.e. the price that would be received to sell a net long position or transfer a net short position for a particular credit risk exposure), rather than the individual values of financial instruments within the portfolio (i.e., the gross position). The new guidance did not have a material effect on our operating activities and financial statements at the time of adoption. Refer to Note 15 - Fair Value Accounting for the new disclosures.

Reconsideration of Effective Control for Repurchase Agreements

In April of 2011, the FASB issued an amendment to existing criteria for determining whether or not a transferor has retained effective control over securities sold under agreements to repurchase.  A secured borrowing is recorded when effective control over the transferred financial assets is maintained while a sale is recorded when effective control over the transferred financial assets has not been maintained. The amendment became effective on a prospective basis for us beginning January 1, 2012.  The new guidance did not have an effect on our operating activities and financial statements at the time of adoption.

Note 3 – Recently Issued but Not Yet Adopted Accounting Standards

Asset Classification and Charge-offs

On April 9, 2012, the FHFA issued Advisory Bulletin 2012-02, Framework for Adversely Classifying Loans, Other Real Estate Owned, and Other Assets and Listing Assets for Special Mention (AB 2012-02). The guidance establishes a standard and uniform methodology for classifying assets and prescribes the timing of asset charge-offs, excluding investment securities. The guidance in AB 2012-02 is generally consistent with the Uniform Retail Credit Classification and Account Management Policy issued by the federal banking regulators in June 2000. AB 2012-02 states that it was effective upon issuance. We are currently assessing the provisions of AB 2012-02 in coordination with the FHFA and therefore have not yet determined when we will implement the guidance, or its effect on our operating activities or financial statements.

Disclosures about Offsetting Assets and Liabilities

In December of 2011, the FASB issued new disclosure requirements pertaining to offsetting (netting) of assets and liabilities to increase the comparability between the statement of financial position prepared under U.S. GAAP and the statement of financial position prepared under IFRS. Currently, offsetting requirements represent a significant difference between amounts presented in the statement of financial position of entities that prepare their statement of financial position pursuant to U.S. GAAP versus entities that prepare their statement of financial position pursuant to IFRS. We would be required to disclose both gross information and net information about both instruments and transactions eligible for offset in our statement of condition and instruments and transactions subject to an agreement such as a master netting arrangement. Similar agreements include (1) derivative clearing agreements, (2) global master repurchase agreements, and (3) global master securities lending agreements. Similar financial instruments include (1) derivatives, (2) sale and repurchase agreements and reverse sale and repurchase agreements, and (3) securities borrowing and securities lending arrangements. Our policy is to only offset derivative instruments in our statements of condition. We do not have other financial instruments within the scope of the new guidance that are subject to an enforceable master netting arrangement or similar agreement. The new guidance takes effect for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. The disclosure requirements would be applied retrospectively for all comparative periods presented.

9

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 4 – Interest Income and Interest Expense

The following table presents interest income and interest expense for the periods indicated:

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Interest income -
Federal Funds sold	$	1		$	1		$	2		$	3
Securities purchased under agreements to resell	1			—			3			4
Interest bearing deposits	—			—			1			—
Investment securities -
Trading	12			22			43			53
Available-for-sale	160			162			486			489
Held-to-maturity	102			125			326			390
Total investment securities	274			309			855			932
Advances	46			53			140			183
Advance prepayment fees, net of fair value hedge adjustments of    $(0), $(43), $(24), and $(50)	19			15			54			20
Total Advances	65			68			194			203
MPF Loans held in portfolio	127			183			429			578
Less: Credit enhancement fees	(2		)	(2		)	(8		)	(6		)
MPF Loans held in portfolio, net	125			181			421			572
Total interest income	466			559			1,476			1,714
Interest expense -
Securities sold under agreements to repurchase	—			4			—			13
Consolidated obligations -
Discount notes	77			88			230			278
Bonds	235			318			766			991
Total consolidated obligations	312			406			996			1,269
Subordinated notes	14			15			43			43
Total interest expense	326			425			1,039			1,325
Net interest income before provision for credit losses	140			134			437			389
Provision for credit losses	—			3			8			12
Net interest income	$	140		$	131		$	429		$	377

10

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 5 – Investment Securities

Our major security types presented in the tables below are defined as follows:

• U.S. Government & other government related consists of the sovereign debt of the United States; debt issued by Fannie Mae, Freddie Mac, and the Federal Farm Credit Banks Funding Corporation; and non mortgage-backed securities of the Small Business Administration, Federal Deposit Insurance Corporation (FDIC), and Tennessee Valley Authority.

• Federal Family Education Loan Program - asset backed securities (FFELP ABS)

• Government Sponsored Enterprises (GSE) residential consists of mortgage-backed securities (MBS) issued by Fannie Mae and Freddie Mac.

• Government-guaranteed residential consists of MBS issued by Ginnie Mae.

• Private-label residential MBS

Gains and losses on sales of securities are determined using the specific identification method and are included in non-interest gain (loss) on the statements of income.

Pledged Collateral

We enter into bilateral collateral agreements and execute derivatives and other transactions with major banks and broker-dealers, and we may pledge investment securities as collateral under these agreements as noted on the face of the Statements of Condition. See Note 9 - Derivatives and Hedging Activities for further details.

Trading Securities

The following table presents the fair value of our trading securities:

As of	September 30, 2012		December 31, 2011
U.S. Government & other government related	$	2,545	$	2,737
MBS:
GSE residential	137		195
Government-guaranteed residential	3		3
Total MBS	140		198
Total trading securities	$	2,685	$	2,935

At September 30, 2012, and 2011, we had net year-to-date unrealized gains (losses) of $(35) million and $(39) million on trading securities still held at period end.

11

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Amortized Cost Basis and Fair Value – Available-for-Sale Securities (AFS)

	Amortized Cost Basis		Non-Credit  OTTI Recognized  in AOCI (Loss)			Gross Unrealized Gains in AOCI		Gross Unrealized Losses in AOCI			Fair Value
As of September 30, 2012
U.S. Government & other government related	$	713	$	—		$	63	$	—		$	776
FFELP ABS	7,176		—			525		(14		)	7,687
MBS:
GSE residential	11,494		—			897		(65		)	12,326
Government-guaranteed residential	2,786		—			185		—			2,971
Private-label residential	81		(11		)	—		(1		)	69
Total MBS	14,361		(11		)	1,082		(66		)	15,366
Total	$	22,250	$	(11	)	$	1,670	$	(80	)	$	23,829
As of December 31, 2011
U.S. Government & other government related	$	947	$	—		$	56	$	(2	)	$	1,001
FFELP ABS	7,796		—			398		(35		)	8,159
MBS:
GSE residential	11,565		—			658		(91		)	12,132
Government-guaranteed residential	2,831		—			130		—			2,961
Private-label residential	90		(26		)	—		(1		)	63
Total MBS	14,486		(26		)	788		(92		)	15,156
Total	$	23,229	$	(26	)	$	1,242	$	(129	)	$	24,316

12

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Amortized Cost, Carrying Value, and Fair Value - Held-to-Maturity Securities (HTM)

	Amortized Cost Basis		Non-credit OTTI Recognized  in AOCI (Loss)			Carrying Value		Gross Unrecognized Holding  Gains		Gross Unrecognized Holding  Losses			Fair  Value
As of September 30, 2012
U.S. Government & other government related	$	2,252	$	—		$	2,252	$	139	$	—		$	2,391
State or local housing agency	25		—			25		—		—			25
MBS:
GSE residential	4,653		—			4,653		422		—			5,075
Government-guaranteed residential	1,353		—			1,353		53		—			1,406
Private-label residential	1,905		(398		)	1,507		295		(9		)	1,793
Total MBS	7,911		(398		)	7,513		770		(9		)	8,274
Total	$	10,188	$	(398	)	$	9,790	$	909	$	(9	)	$	10,690
As of December 31, 2011
U.S. Government & other government related	$	2,573	$	—		$	2,573	$	104	$	—		$	2,677
State or local housing agency	27		—			27		—		—			27
MBS:
GSE residential	5,761		—			5,761		423		—			6,184
Government-guaranteed residential	1,414		—			1,414		34		—			1,448
Private-label residential	2,168		(466		)	1,702		145		(52		)	1,795
Total MBS	9,343		(466		)	8,877		602		(52		)	9,427
Total	$	11,943	$	(466	)	$	11,477	$	706	$	(52	)	$	12,131

13

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Aging of Unrealized Temporary Losses

The following tables present unrealized temporary losses on our AFS and HTM portfolio for periods less than 12 months and for 12 months or more. We recognized no OTTI charges on these unrealized loss positions because we expect to recover the entire amortized cost basis, we do not intend to sell these securities, and we believe it is more likely than not that we will not be required to sell them prior to recovering their amortized cost basis. In the tables below, in cases where the fair value or gross unrealized losses for an investment category is insignificant, we don't report a balance.

Available-for-Sale Securities

	Less than 12 Months					12 Months or More						Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses				Fair Value		Gross Unrealized Losses
As of September 30, 2012
U.S. Government & other government related	$	—	$	—		$	49	$	—			$	49	$	—
FFELP ABS	—		—			1,123		(14		)		1,123		(14		)
MBS:
GSE residential	—		—			3,685		(65		)		3,685		(65		)
Private-label residential	—		—			69		(12		)	a	69		(12		)	a
Total MBS	—		—			3,754		(77		)		3,754		(77		)
Total available-for-sale securities	$	—	$	—		$	4,926	$	(91	)		$	4,926	$	(91	)
As of December 31, 2011
U.S. Government & other government related	$	98	$	(2	)	$	—	$	—			$	98	$	(2	)
FFELP ABS	223		(3		)	1,203		(32		)		1,426		(35		)
MBS:
GSE residential	4,073		(91		)	—		—				4,073		(91		)
Government-guaranteed residential	33		—			80		—				113		—
Private-label residential	—		—			63		(27		)	a	63		(27		)	a
Total MBS	4,106		(91		)	143		(27		)		4,249		(118		)
Total available-for-sale securities	$	4,427	$	(96	)	$	1,346	$	(59	)		$	5,773	$	(155	)

^a  Includes $36 million and $28 million of gross unrealized/unrecognized recoveries in fair value at September 30, 2012, and at December 31, 2011.

14

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Held-to-Maturity Securities

	Less than 12 Months				12 Months or More					Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
As of September 30, 2012
MBS:
Private-label residential	$	—	$	—	$	1,645	$	(407	)	$	1,645	$	(407	)
Total MBS	—		—		1,645		(407		)	1,645		(407		)
Total held-to-maturity securities	$	—	$	—	$	1,645	$	(407	)	$	1,645	$	(407	)
As of December 31, 2011
U.S. Government & other government related	$	7	$	—	$	—	$	—		$	7	$	—
MBS:
GSE residential	—		—		37		—			37		—
Private-label residential	—		—		1,653		(518		)	1,653		(518		)
Total MBS	—		—		1,690		(518		)	1,690		(518		)
Total held-to-maturity securities	$	7	$	—	$	1,690	$	(518	)	$	1,697	$	(518	)

Contractual Maturity Terms

The table below presents the amortized cost basis and fair value of AFS and HTM securities by contractual maturity, excluding ABS and MBS securities. These securities are excluded because their expected maturities may differ from their contractual maturities if borrowers of the underlying loans elect to prepay their loans.

	Available-for-Sale				Held-to-Maturity
As of September 30, 2012	Amortized Cost		Fair  Value		Carrying Value		Fair  Value
Year of Maturity -
Due in one year or less	$	—	$	—	$	506	$	509
Due after one year through five years	113		122		58		59
Due after five years through ten years	105		114		493		520
Due after ten years	495		540		1,220		1,328
Total non-ABS/MBS	713		776		2,277		2,416
ABS and MBS	21,537		23,053		7,513		8,274
Total securities	$	22,250	$	23,829	$	9,790	$	10,690

15

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Other-Than-Temporary Impairment

We recognized credit losses into earnings on securities in an unrealized loss position for which we do not expect to recover the entire amortized cost basis. Non-credit losses are recognized in AOCI since we do not intend to sell these securities and we believe it is more likely than not that we will not be required to sell any investment security before the recovery of its amortized cost basis. The non-credit loss in AOCI on HTM securities will be accreted back into the HTM securities over their remaining lives as an increase to the carrying value, since we ultimately expect to collect these amounts. See Statements of Comprehensive Income on page 5.

Significant Inputs Used on OTTI Securities

Our OTTI analysis of our private-label MBS includes key modeling assumptions, significant inputs, and methodologies provided by an FHLB System OTTI Committee. We use the information provided to generate cash flow projections used in analyzing credit losses and determining OTTI for private-label MBS. The OTTI Committee was formed by the FHLBs to achieve consistency among the FHLBs in their analyses of the OTTI of private-label MBS. We are responsible for making our own determination of impairment, which includes determining the reasonableness of assumptions, significant inputs, and methodologies used, and performing the required present value calculations using appropriate historical cost bases and yields. 

In cases where the fair value of a private-label MBS is less than its amortized cost basis at the balance sheet date, we assess whether its entire amortized cost basis will be recovered. Specifically, we perform a cash flow analysis for substantially all of these securities that utilizes two models provided by independent third parties.

The first model considers borrower characteristics and the particular attributes of the loans underlying the securities, in conjunction with assumptions about future changes in home prices and interest rates, prepayment rates, default rates, and loss severities. A significant input to the first model is the forecast of future housing price changes for the relevant states and core based statistical areas (CBSAs), which are based upon an assessment of the individual housing markets. CBSA refers collectively to metropolitan and micropolitan statistical areas as defined by the United States Office of Management and Budget; as currently defined, a CBSA must contain at least one urban area with a population of 10,000 or more people.

The second model uses the month-by-month projections of future loan performance derived from the first model and allocates the projected loan level cash flows and losses to the various security classes in the securitization structure in accordance with its prescribed cash flow and loss allocation rules.

Our housing price forecast as of September 30, 2012 assumed current-to-trough home price declines ranging from 0.0% (for those housing markets that are believed to have reached their trough) to 4.0%. For those markets where further home price declines are anticipated, the declines were projected to occur over the 3- to 9-month period beginning July 1, 2012. From the trough, home prices were projected to recover using one of five different recovery paths that vary by housing market. For the vast majority of markets for which further home price declines are anticipated, the declines were projected to range from 1% to 2% over the 3-month period beginning July 1, 2012.

The following table presents the projected home price recovery by future month.

As of September 30, 2012	Recovery Range Annualized %
Months	Low	High
1-6	0.0%	2.8%
7-18	0.0%	3.0%
19-24	1.0%	4.0%
25-30	2.0%	4.0%
31-42	2.0%	5.0%
43-66	2.0%	6.0%
Thereafter	2.3%	5.6%

16

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

The table below presents the inputs we used to measure the amount of the credit loss recognized in earnings during the current period attributable to OTTI securities. The model used to estimate cash flows classifies the OTTI securities as either prime, Alt-A, or subprime based on an assessment as of the current period rather than the classification at the time of issuance.

			Prepayment Rates			Default Rates			Loss Severities			Credit Enhancement
			%	Range %		%	Range %		%	Range %		%	Range %
As of September 30, 2012	Unpaid Principal Balance		Weighted Average	Low	High	Weighted Average	Low	High	Weighted Average	Low	High	Weighted Average	Low	High
2006 Prime	$	103	8.4	8.1	9.3	36.6	27.4	40.6	42.3	40.0	43.3	3.2	1.9	6.3
2006 Subprime	15		2.8	2.0	3.6	79.8	71.5	87.5	74.2	69.3	78.7	1.3	—	2.5
Total	$	118	7.7	2.0	9.3	42.2	27.4	87.5	46.4	40.0	78.7	3.0	—	6.3

In the following two tables, we classify our private-label MBS as prime, subprime, or Alt-A based upon the nature of the majority of underlying mortgages collateralizing each security based on the issuer's classification, or as published by a nationally recognized statistical rating organization (NRSRO), at the time of issuance of the MBS.  On October 15, 2010, we instituted litigation relating to sixty-four private label MBS bonds purchased by us in an aggregate original principal amount of approximately $4.29 billion. Our complaints assert claims for untrue or misleading statements in the sale of securities, and it is possible that the classifications of private-label MBS, as well as other statements made about the securities by the issuer, are inaccurate. 

The following table presents the current outstanding balances on private-label MBS that were other-than-temporarily impaired at some point during the life of the securities. This table does not include HTM and AFS securities that are in an unrealized loss position, which have not had an OTTI charge during the life of the security.

As of September 30, 2012	Unpaid Principal Balance		Amortized Cost Basis		Carrying Value		Fair Value
Private-label residential MBS:
Alt-A	$	124	$	79	$	68	$	68
Total OTTI AFS securities	$	124	$	79	$	68	$	68
Private-label residential MBS:
Prime	$	1,419	$	1,098	$	818	$	1,024
Subprime	842		547		429		509
Total OTTI HTM securities	$	2,261	$	1,645	$	1,247	$	1,533

17

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

We recognized OTTI as presented in the following table. Net non-credit portion reclassified (from) to AOCI represents the net amount of impairment losses recognized into earnings from AOCI or reclassified to AOCI from earnings.

	Total OTTI			Net Non-credit Portion (from) to AOCI			OTTI Credit Portion
Three months ended September 30, 2012
Total OTTI	$	—		$	—		$	—
Three months ended September 30, 2011
Prime	$	—		$	(11	)	$	(11	)
Subprime	(7		)	4			(3		)
Total OTTI	$	(7	)	$	(7	)	$	(14	)
Nine months ended September 30, 2012
Prime	$	—		$	(14	)	$	(14	)
Subprime	(2		)	1			(1		)
Total OTTI	$	(2	)	$	(13	)	$	(15	)
Nine months ended September 30, 2011
Prime	$	—		$	(35	)	$	(35	)
Alt-A	—			(6		)	(6		)
Subprime	(16		)	—			(16		)
Total OTTI	$	(16	)	$	(41	)	$	(57	)

18

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

The following table presents the changes in the cumulative amount of credit losses (recognized into earnings) on OTTI investment securities for the periods stated.

Three months ended September 30,	2012			2011
Beginning Balance	$	724		$	694
Additions:
Additional credit losses on securities for which an OTTI charge was previously recognized	—			14
Total OTTI credit losses recognized in the period	—			14
Reductions:
Securities sold, matured, paid down, or prepaid over the period	—			(1		)
Increases in cash flows expected to be collected that have been recognized into net income	(1		)	—
Ending Balance	$	723		$	707
Nine months ended September 30,
Beginning Balance	$	712		$	653
Additions:
Additional credit losses on securities for which an OTTI charge was previously recognized	15			57
Total OTTI credit losses recognized in the period	15			57
Reductions:
Securities sold, matured, paid down, or prepaid over the period	—			(1		)
Increases in cash flows expected to be collected that have been recognized into net income	(4		)	(2		)
Ending Balance	$	723		$	707

19

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 6 – Advances

We offer a wide range of fixed- and variable-rate advance products with different maturities, interest rates, payment characteristics and optionality. The following table presents our advances by callable/putable features:

As of	September 30, 2012		December 31, 2011
Noncallable/nonputable	$	10,357	$	11,456
Callable	771		806
Putable	2,190		2,828
Total par value	13,318		15,090
Hedging adjustments	185		189
Other adjustments	28		12
Total advances	$	13,531	$	15,291

The following table presents our advances by redemption terms:

As of September 30, 2012	Amount		Weighted Average Interest Rate			Next Maturity or Call Date		Next Maturity or Put Date
Due in one year or less	$	4,211	0.99	%		$	4,966	$	6,364
One to two years	1,054		2.44	%		960		1,046
Two to three years	1,016		1.86	%	a	966		1,009
Three to four years	1,504		3.25	%		1,254		741
Four to five years	1,280		3.15	%		1,080		847
More than five years	4,253		1.45	%	a	4,092		3,311
Total par value	$	13,318	1.78	%		$	13,318	$	13,318

^a  Weighted average interest rate is due to the inclusion of significant variable-rate advances.

Advances Concentration

As of September 30, 2012, the following advance borrowers exceeded 10% of our total advances outstanding: BMO Harris Bank National Association with $2.4 billion or 18% and State Farm Bank, F.S.B with $1.7 billion or 13%.

20

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 7 – MPF Loans

We developed the MPF Program to allow us to invest in mortgages to help fulfill our housing mission and provide an additional source of liquidity to our members. The MPF Program is a secondary mortgage market structure under which we acquired and funded eligible mortgage loans from or through PFIs, and in some cases we purchased participations in pools of eligible mortgage loans from other FHLBs (MPF Banks). MPF Loans are defined as conforming conventional and Government fixed-rate mortgage loans secured by one-to-four family residential properties with maturities ranging from 5 years to 30 years or participations in such mortgage loans.

The following table presents information on MPF Loans held in our portfolio by contractual maturity at time of purchase. All are fixed-rate. Government is comprised of loans insured by the Federal Housing Administration (FHA) or the Department of Housing and Urban Development (HUD) and loans guaranteed by the Department of Veteran Affairs (VA) or Department of Agriculture Rural Housing Service (RHS). MPF Loans outstanding continue to decrease as a result of our ongoing strategy to not add MPF Loans to our balance sheet, except for loans being acquired under our affordable housing programs.

As of	September 30, 2012			December 31, 2011
Medium term (15 years or less)	$	2,827		$	3,810
Long term (greater than 15 years)	8,335			10,155
Total unpaid principal balance	11,162			13,965
Net premiums, credit enhancement and deferred loan fees	41			53
Hedging adjustments	107			145
Total before allowance for credit losses	11,310			14,163
Allowance for credit losses	(44		)	(45		)
Total MPF Loans held in portfolio, net	$	11,266		$	14,118
Conventional	$	8,954		$	11,433
Government	2,208			2,532
Total unpaid principal balance	$	11,162		$	13,965

See Note 8 - Allowance for Credit Lossesfor information related to our credit risk on MPF Loans and allowance for credit losses methodology.

21

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 8 – Allowance for Credit Losses

We have established an allowance methodology for each of our portfolio segments:

•credit products (advances, letters of credit and other extensions of credit to borrowers);

•conventional MPF Loans held for portfolio;

•government MPF Loans held for portfolio; and

•term Federal Funds sold and term securities purchased under agreements to resell.

For detailed information on these methodologies and our accounting policies please see Note 9 - Allowance for Credit Losses in our 2011 Form 10-K.

Credit Products

For the periods presented, we had no credit products that were past due, on nonaccrual status, or considered impaired. In addition, there have been no troubled debt restructurings related to our credit products during the periods then ended. Based upon the collateral we held as security, our credit extension and collateral policies, our credit analysis and the repayment history on credit products, we do not believe that any credit losses have been incurred on our credit products; accordingly, we have not recorded any allowance for credit losses for our credit products. Additionally, no liability was recorded to reflect an allowance for credit losses for our credit products with off-balance sheet credit exposures.

Conventional MPF Loans

MPF Risk Sharing Structure

For a definition of MPF Risk Sharing Structure see page F-36 in our 2011 Form 10-K. We share the risk of credit losses on conventional MPF Loan products with our PFIs (excluding the MPF Xtra product) by structuring potential losses on conventional MPF Loans into layers with respect to each master commitment (MC). We require that conventional MPF Loans held in our portfolio be credit enhanced at inception so that our risk of loss is limited to be equivalent to the losses of an investor in an AA rated mortgage backed security. As a part of our methodology to determine the amount of credit enhancement necessary, we analyze the risk characteristics of each MPF Loan using a model licensed from an NRSRO. We use the model to evaluate loan data provided by the PFI as well as other relevant information.

The table below presents the impact of the MPF Risk Sharing Structure and severity rates on our allowance for credit losses. As of September 30, 2012, our Total Severity Rate for the MPF Risk Sharing Structure was 38.0%, which included a weighted average Credit Loss Severity Rate of 22.0% attributable to the MPF Loan pool and impaired collateral dependent MPF Loans. Comparable rates at December 31, 2011, were 35.0% and 19.3%. For detailed definitions of how Total Severity Rate and Credit Loss Severity Rate are calculated, see Loss Severity on page F-38 in our 2011 Form 10-K.

As of	September 30, 2012			December 31, 2011
Total estimated losses outstanding	$	91		$	97
Less: losses expected to be absorbed by MPF Risk Sharing Structure	(23		)	(23		)
Our share of total losses	68			74
Less: non-credit losses a	(29		)	(34		)
Credit losses	39			40
Plus: other estimated credit losses in the remaining portfolio	5			5
Allowance for credit losses on conventional MPF Loans	$	44		$	45

^a  Non-credit losses represent period costs on Real Estate Owned (REO), for example, real estate taxes and maintenance costs and the economic loss of interest income that was contractually due but which was not recognized in our financial statements as the impaired MPF Loans were placed on nonaccrual status.

22

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

The following table presents the changes in the allowance for credit losses on conventional MPF Loans and the recorded investment by impairment methodology.

	September 30, 2012			September 30, 2011
For the three months ended
Allowance for credit losses on conventional MPF Loans-
Balance, beginning of period	$	48		$	39
Losses charged to the allowance	(4		)	(1		)
Provision for credit losses	—			3
Balance, end of period	$	44		$	41
For the nine months ended
Allowance for credit losses on conventional MPF Loans-
Balance, beginning of period	$	45		$	33
Losses charged to the allowance	(9		)	(4		)
Provision for credit losses	8			12
Balance, end of period	$	44		$	41
As of	September 30, 2012			December 31, 2011
Allowance assigned to conventional MPF Loans-
Specifically identified and individually evaluated for impairment	$	31		$	26
Homogeneous pools of loans and collectively evaluated for impairment	13			19
Total	$	44		$	45
Recorded Investment in Conventional MPF Loans-
Individually evaluated for impairment - with an allowance	$	223		$	204
Collectively evaluated for impairment	8,910			11,470
Total	$	9,133		$	11,674

Government MPF Loans Held for Portfolio

We invest in fixed-rate government MPF Loans which are insured or guaranteed by the Federal Housing Administration (FHA), the Department of Veterans Affairs (VA), the Rural Housing Service of the Department of Agriculture (RHS), and/or by the Department of Housing and Urban Development (HUD). The PFI provides and maintains insurance or a guaranty from these agencies. The PFI is responsible for compliance with all government agency requirements and for obtaining the benefit of the applicable insurance or guaranty with respect to defaulted government MPF Loans. Any losses incurred on such loans that are not recovered from the issuer or guarantor, are absorbed by the servicing PFIs. Therefore, we only have credit risk for these loans if the servicing PFI fails to pay for losses not covered by FHA or HUD insurance, or VA or RHS guarantees. In this regard, based on our assessment of our servicing PFIs, we did not establish an allowance for credit losses for our government MPF Loan portfolio as of the periods presented. Further, due to the government guarantee or insurance, these loans are not placed on nonaccrual status.

23

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Credit Quality Indicators - MPF Loans

The table below summarizes our recorded investment in MPF Loans by our key credit quality indicators.

	September 30, 2012									December 31, 2011
As of	Conventional			Government			Total			Conventional			Government			Total
Past due 30-59 days	$	178		$	123		$	301		$	222		$	161		$	383
Past due 60-89 days	58			42			100			74			55			129
Past due 90 days or more	265			224			489			303			248			551
Total past due	501			389			890			599			464			1,063
Total current	8,632			1,846			10,478			11,075			2,097			13,172
Total recorded investment	$	9,133		$	2,235		$	11,368		$	11,674		$	2,561		$	14,235
In process of foreclosure	$	159		$	85		$	244		$	193		$	63		$	256
Serious delinquency rate a	2.91		%	10.06		%	4.32		%	2.62		%	9.69		%	3.89		%
Past due 90 days or more still accruing interest b	$	79		$	225		$	304		$	128		$	248		$	376
On nonaccrual status	$	228		$	—		$	228		$	211		$	—		$	211

^a  MPF Loans that are 90 days or more past due or in the process of foreclosure as a percentage of the total recorded investment.

^b  Consists of MPF Loans that are either government mortgage loans or conventional mortgage loans that are well secured (by collateral that have a realizable value sufficient to discharge the debt or by the guarantee or insurance, such as PMI, of a financially responsible party) and in the process of collection.

Troubled Debt Restructurings

We consider a troubled debt restructuring to have occurred when we grant a concession to a borrower that we would not otherwise consider for economic or legal reasons related to the borrower's financial difficulties.  An MPF Loan involved in our troubled debt restructuring program is individually evaluated for impairment when determining its related allowance for credit losses.  Credit loss is measured by factoring in expected cash shortfalls (i.e., loss severity rate) incurred as of the reporting date as well as the economic loss attributable to delaying the original contractual principal and interest due dates.

In the event a borrower qualifies for a troubled debt restructuring under our program, we typically modify the borrower's monthly payment for a period of up to 36 months to try to achieve a target housing expense ratio of not more than 31% of their monthly qualifying income.   Any and all delinquent interest on the loan may be capitalized as long as the resulting principal balance does not exceed the original principal balance, otherwise all delinquent interest is written off.  Next, we re-amortize the new outstanding balance to reflect a principal and interest payment for a term not to exceed 40 years and attempt to achieve the target housing expense ratio. This results in a balloon payment at the original maturity date of the loan as the maturity date and number of remaining monthly payments are not adjusted.  If the target housing expense ratio is still not met, we reduce the interest rate in 0.125% increments below the original note rate, to a floor rate of 3.00% for up to 36 months, in an effort to further reduce principal and interest payments again, until the target housing expense ratio is met.

Our recorded investment in troubled debt restructurings on our conventional MPF Loans that occurred during the three and nine months ended September 30, 2012, was $2 million and $7 million, and during the three and nine months ended September 30, 2011, was $2 million and $5 million. These amounts represent both the pre- and post- modification amounts recorded in our statement of condition as of the date the troubled debt restructurings were consummated. The pre- and post- modification amounts are the same as we did not record any write-offs either due to the forgiveness of principal or a direct write-off due to a confirmed loss.

Troubled debt restructurings that were modified during the previous 12 months that subsequently defaulted during the nine months ended September 30, 2012, were $8 million. A borrower is considered to have defaulted on a troubled debt restructuring if their contractually due principal or interest payment is sixty days past due at any time during the past 12 months. In certain cases, these troubled debt restructurings may have subsequently become current.

24

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Individually Evaluated Impaired Loans

The following table summarizes the recorded investment, unpaid principal balance, and related allowance of impaired MPF Loans individually assessed for impairment, which includes impaired collateral dependent MPF Loans and troubled debt restructurings. We had no impaired MPF Loans without an allowance for either date.

	September 30, 2012						December 31, 2011
As of	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
Impaired conventional MPF Loans with an allowance	$	223	$	221	$	31	$	204	$	202	$	26

The following table summarizes the average recorded investment of impaired MPF Loans and related interest recognized.

	September 30, 2012				September 30, 2011
For the periods ended	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Three months	$	210	$	3	$	138	$	2
Nine months	207		7		136		5

Real Estate Owned

We had $60 million and $46 million in REO, recorded in other assets, at September 30, 2012, and December 31, 2011.

Term Federal Funds Sold and Term Securities Purchased Under Agreements to Resell

These financing receivables are short-term and the recorded balance approximates fair value. All federal funds sold were repaid according to the contractual terms. Federal Funds are only evaluated for purposes of an allowance for credit losses if the investment is not paid when due.

Securities purchased under agreements to resell are considered collateralized financing arrangements and effectively represent short-term loans with highly rated counterparties. The terms of these loans are structured such that if the market values of the underlying securities decrease below the market value required as collateral, the counterparty must place an equivalent amount of additional securities as collateral or remit an equivalent amount of cash, or the dollar value of the resale agreement will be decreased accordingly. If an agreement to resell is deemed to be impaired, the difference between the fair value of the collateral and the amortized cost of the agreement is charged to earnings. Based upon the collateral held as security, we have determined that no allowance for credit losses was needed for our securities purchased under agreements to resell. All securities purchased under agreements to resell were repaid according to the contractual terms.

25

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 9 – Derivatives and Hedging Activities

Refer to Note 2 - Summary of Significant Accounting Polices in our 2011 Form 10-K for our accounting policies for derivatives. Subsequent to the filing of that 10-K, we have added forward starting advances, which lock in the current market interest rate for future settlement of the advance. We may hedge a firm commitment for a forward-starting advance through the use of an interest rate swap. In this case, the swap will function as the hedging instrument for both the firm commitment and the subsequent advance. The carrying value of the firm commitment will be included in the basis of the advance at the time the commitment is terminated and the advance is issued. The basis adjustment will then be amortized into interest income over the life of the advance.

Managing Credit Risk on Derivative Agreements

We are subject to credit risk due to the risk of nonperformance by counterparties to our derivative agreements. The degree of counterparty risk depends on the extent to which master netting arrangements are included in such contracts to mitigate the risk. We manage counterparty credit risk through credit analysis, collateral requirements and adherence to the requirements set forth in our policies and FHFA regulations. We require collateral agreements on all derivatives that establish collateral delivery thresholds. Additionally, collateral related to derivatives with member institutions includes collateral assigned to us, as evidenced by a written security agreement, and held by the member institution for our benefit. Based on credit analyses and collateral requirements, we do not anticipate any credit losses on our derivative agreements. SeeNote 15 - Fair Value Accounting for discussion regarding our fair value methodology for derivative assets and liabilities, including an evaluation of the potential for the fair value of these instruments to be affected by counterparty credit risk.

Our derivative agreements contain provisions that require us to post additional collateral with our counterparties if there is deterioration in our credit rating, except for those derivative agreements with a zero unsecured collateral threshold for both parties, in which case positions are required to be fully collateralized regardless of credit rating. If our credit rating is lowered by a major credit rating agency, such as Standard and Poor's or Moody’s, we would be required to deliver additional collateral on derivatives in net liability positions. If our credit rating had been lowered from its current rating to the next lower rating, we would have been required to deliver up to an additional $91 million of collateral at fair value to our derivatives counterparties at September 30, 2012.

We transact most of our derivatives with large banks and major broker-dealers. Some of these banks and broker-dealers or their affiliates buy, sell, and distribute consolidated obligations. We are not a derivative dealer and do not trade derivatives for speculative purposes.

26

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

The following table summarizes our derivatives, including cash collateral and related interest where we had the right to reclaim the collateral on derivative assets. We delivered no excess collateral on derivative liabilities for the periods presented.

	September 30, 2012								December 31, 2011
As of	Notional Amount		Derivative Assets			Derivative Liabilities			Notional Amount		Derivative Assets			Derivative Liabilities
Derivatives in hedge accounting relationships-
Interest rate swaps	$	25,509	$	132		$	2,233		$	28,240	$	203		$	2,099
Interest rate swaptions	—		—			—			370		32			—
Total	25,509		132			2,233			28,610		235			2,099
Derivatives not in hedge accounting relationships-
Interest rate swaps	17,889		740			691			38,159		927			785
Interest rate swaptions	6,290		164			—			4,820		179			—
Interest rate caps or floors	1,913		243			—			1,913		254			—
Mortgage delivery commitments	1,499		25			25			502		4			4
Total	27,591		1,172			716			45,394		1,364			789
Total before adjustments	$	53,100	1,304			2,949			$	74,004	1,599			2,888
Netting adjustments a			(1,214		)	(1,214		)			(1,461		)	(1,461		)
Exposure at fair value b			90			1,735					138			1,427
Cash collateral and related accrued interest			(35		)	(1,616		)			(98		)	(1,221		)
Derivative assets and liabilities			$	55		$	119				$	40		$	206

^a  Amounts represent the effect of legally enforceable master netting agreements that allow us to settle positive and negative positions.

^b  Includes net accrued interest receivable of $3 million as of September 30, 2012, and $13 million as of December 31, 2011.

The following tables present the components of derivatives and hedging activities as presented in the statements of income.

	Three months ended September 30,						Nine months ended September 30,
For the periods ending	2012			2011			2012			2011
Fair value hedges -
Interest rate swaps	$	—		$	(16	)	$	(3	)	$	(10	)
Other	—			2			1			(5		)
Fair value hedges - ineffectiveness net gain (loss)	—			(14		)	(2		)	(15		)
Cash flow hedges - ineffectiveness net gain (loss)	—			26			2			40
Economic hedges -
Interest rate swaps	(29		)	(180		)	(75		)	(185		)
Interest rate swaptions	6			201			24			141
Interest rate caps/floors	(2		)	42			(11		)	32
Interest rate futures/TBA	—			—			—			—
Mortgage delivery commitments	1			—			1			—
Net interest settlements	23			20			63			64
Economic hedges - net gain (loss)	(1		)	83			2			52
Net gains (losses) on derivatives and hedging activities	$	(1	)	$	95		$	2		$	77

27

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Fair Value Hedges

The following table presents, by type of hedged item, the gains (losses) on derivatives and the related hedged items in fair value hedging relationships and the effect of those derivatives on our net interest income.

	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item			Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities			Effect of Derivatives on Net Interest Income a			Hedge Adjustments Amortized into Net Interest Income b
Three months ended September 30, 2012
Hedged item type -
Available-for-sale securities	$	(35	)	$	36		$	1		$	(33	)	$	—
Advances	(5		)	6			1			(19		)	—
MPF Loans held for portfolio	—			—			—			—			(12		)
Consolidated obligation bonds	(4		)	2			(2		)	31			(6		)
Total	$	(44	)	$	44		$	—		$	(21	)	$	(18	)
Three months ended September 30, 2011
Hedged item type -
Available-for-sale securities	$	(335	)	$	323		$	(12	)	$	(36	)	$	—
Advances	(43		)	44			1			(29		)	(42		)
MPF Loans held for portfolio	4			(2		)	2			(1		)	(12		)
Consolidated obligation bonds	162			(167		)	(5		)	79			(11		)
Total	$	(212	)	$	198		$	(14	)	$	13		$	(65	)
Nine months ended September 30, 2012
Hedged item type -
Available-for-sale investments	$	(112	)	$	111		$	(1	)	$	(98	)	$	—
Advances	(13		)	20			7			(64		)	(24		)
MPF Loans held for portfolio	1			—			1			(2		)	(39		)
Consolidated obligation bonds	3			(12		)	(9		)	111			(22		)
Total	$	(121	)	$	119		$	(2	)	$	(53	)	$	(85	)
Nine months ended September 30, 2011
Hedged item type -
Available-for-sale investments	$	(419	)	$	405		$	(14	)	$	(103	)	$	—
Advances	(26		)	34			8			(115		)	(51		)
MPF Loans held for portfolio	(2		)	(4		)	(6		)	(6		)	(37		)
Consolidated obligation bonds	291			(294		)	(3		)	239			(29		)
Total	$	(156	)	$	141		$	(15	)	$	15		$	(117	)

^a  Represents the effect of net interest settlements attributable to existing derivative hedging instruments on net interest income. The effect of derivatives on net interest income is included in the interest income/expense line item of the respective hedged item type.

^b  Amortization of hedge adjustments is included in the interest income/expense line item of the respective hedged item type.

28

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Cash Flow Hedges

The following table presents our gains (losses) on our cash-flow hedging relationships recorded in income and other comprehensive income (loss). In the tables below, in cases where amounts are insignificant in the aggregate, we don't report a balance.

	Effective Portion Reclassified From AOCI to Interest			Ineffective Portion Reclassified to Derivatives and Hedging Activities			Total Reclassified Into Statements of Income			Effective Portion Recorded in AOCI			Total Change in OCI			Net Interest Settlements Effect on Net Interest Income a
Three months ended September 30, 2012
Advances - interest rate floors	$	3		$	—	b	$	3		$	—		$	(3	)	$	—
Discount notes -      interest rate caps	(1		)	—			(1		)	—			1			—
interest rate swaps	—			—			—			(33		)	(33		)	(67		)
Bonds - interest rate swaps	(1		)	—			(1		)	—			1			—
Total	$	1		$	—		$	1		$	(33	)	$	(34	)	$	(67	)
Three months ended September 30, 2011
Advances - interest rate floors	$	4		$	25	b	$	29		$	—		$	(29	)	$	—
Discount notes -      interest rate caps	(3		)	—			(3		)	—			3			—
interest rate swaps	(2		)	1			(1		)	(400		)	(399		)	(80		)
Bonds - interest rate swaps	(2		)	—			(2		)	—			2			—
Total	$	(3	)	$	26		$	23		$	(400	)	$	(423	)	$	(80	)
Nine months ended September 30, 2012
Advances - interest rate floors	$	11		$	—	b	$	11		$	—		$	(11	)	$	—
Discount notes -      interest rate caps	(5		)	—			(5		)	—			5			—
interest rate swaps	(2		)	2			—			(91		)	(91		)	(202		)
Bonds - interest rate swaps	(4		)	—			(4		)	—			4			—
Total	$	—		$	2		$	2		$	(91	)	$	(93	)	$	(202	)
Nine months ended September 30, 2011
Advances - interest rate floors	$	26		$	37	b	$	63		$	—		$	(63	)	$	—
Discount notes -      interest rate caps	(11		)	—			(11		)	—			11			—
interest rate swaps	(4		)	3			(1		)	(453		)	(452		)	(241		)
Bonds - interest rate swaps	(4		)	—			(4		)	—			4			—
Total	$	7		$	40		$	47		$	(453	)	$	(500	)	$	(241	)

^a  Represents the effect of net interest settlements attributable to open derivative hedging instruments on net interest income. The effect of     derivatives on net interest income is included in the interest income/expense line item of the respective hedged item type.

^b  Represents the recognition of previously deferred cash flow hedge adjustments related to advances in cash flow hedge relationships that were prepaid during the period.

There were no amounts reclassified from AOCI into earnings for the periods presented as a result of the discontinuance of cash-flow hedges because the original forecasted transactions failed to occur by the end of the originally specified time period or within a two-month period thereafter. The deferred net gains on derivative instruments in AOCI that are expected to be reclassified to earnings during the next twelve months were $10 million as of September 30, 2012. The maximum length of time over which we are hedging our exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, is 8 years.

29

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 10 – Consolidated Obligations

The following table presents our consolidated obligation bonds, for which we are the primary obligor, including callable bonds that are redeemable in whole, or in part, at our discretion on predetermined call dates.

As of September 30, 2012	Contractual Maturity		Weighted Average Interest Rate		Next Maturity or Call Date
Due in one year or less	$	7,646	3.37	%	$	19,153
One to two years	5,615		3.76	%	6,150
Two to three years	2,125		2.52	%	1,208
Three to four years	3,768		3.70	%	2,768
Four to five years	5,890		2.05	%	1,575
Thereafter	8,378		2.85	%	2,568
Total par value	$	33,422	3.06	%	$	33,422

The following table presents our consolidated obligation discount notes for which we are the primary obligor. All are due in one year or less.

	Carrying Value		Par Value		Weighted Average Interest Rate
As of September 30, 2012	$	27,231	$	27,235	0.13	%
As of December 31, 2011	25,404		25,411		0.05	%

The following table presents consolidated obligation bonds outstanding by call feature:

As of	September 30, 2012			December 31, 2011
Noncallable	$	20,759		$	24,479
Callable	12,663			15,485
Total par value	33,422			39,964
Bond premiums (discounts), net	14			19
Hedging adjustments	(70		)	(104		)
Fair value option adjustments	—			1
Total consolidated obligation bonds	$	33,366		$	39,880

30

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 11 – Subordinated Notes

Our subordinated notes outstanding mature on June 13, 2016. The subordinated notes are not obligations of, and are not guaranteed by, the United States government or any FHLBs other than us. The subordinated notes are unsecured obligations and rank junior in priority of payment to our senior liabilities. Senior liabilities include all of our existing and future liabilities, such as deposits, consolidated obligations for which we are the primary obligor and consolidated obligations of the other FHLBs for which we are jointly and severally liable. For further description of our subordinated notes see Note 15 - Subordinated Notes in our 2011 Form 10-K.

Prior to conversion to our new capital structure, we were allowed to include a percentage of the outstanding principal amount of the subordinated notes (the Designated Amount) in determining compliance with our regulatory capital and minimum regulatory leverage requirements, maximum permissible holdings of MBS and unsecured credit, subject to 20% annual phase-outs that commenced June 14, 2011. At December 31, 2011, the Designated Amount of subordinated notes was $800 million.

After converting our capital stock as of January 1, 2012, we no longer include the Designated Amount of subordinated notes in calculating our maximum permissible holdings of MBS and unsecured credit or in determining compliance with our minimum regulatory capital requirements now that we are subject to the post-conversion capital requirements discussed in Note 13 - Capital Stock and Mandatorily Redeemable Capital Stock (MRCS).

Note 12 - Regulatory Actions

On April 18, 2012, the FHFA terminated the Consent Order to Cease and Desist (the C&D Order) that we entered into with the Federal Housing Finance Board in October 2007. The C&D Order placed several requirements on us, including among other things, restrictions on the repurchase and redemption of capital stock, prior approval of dividend declarations and submission of a revised Capital Plan, as further described in Note 16 - Regulatory Actions in our 2011 Form 10-K.

In connection with operating the Bank after termination of the C&D Order, our Board of Directors adopted a resolution on March 30, 2012, which included the following:

• As required by the FHFA in connection with the approval of our Capital Plan, we will continue to obtain FHFA approval for any new investments that have a term to maturity in excess of 270 days until such time as our MBS portfolio is less than three times our total regulatory capital and our advances represent more than 50% of our total assets.

• In addition to the requirements to declare and pay dividends in accordance with our Retained Earnings and Dividend Policy, dividends paid on either Class B-1 stock or Class B-2 stock in any given quarter must not exceed the average of three-month LIBOR for that quarter on an annualized basis. We may, with approval of the Board, request approval from the FHFA to pay dividends in excess of this limit in advance of a coming calendar year.

• We must maintain retained earnings at a level equal to a “floor” amount, which is the greater of our retained earnings as of each immediately preceding year-end or $1.321 billion, and will not pay a dividend without prior written approval by the FHFA if the payment of such dividend would cause our retained earnings to be reduced below the “floor” amount. Our retained earnings at December 31, 2011, were $1.321 billion.

• We will continue to execute and comply with our plan to repurchase excess capital stock of members over a period of time (Repurchase Plan) as approved by the FHFA in December 2011. Once the Repurchase Plan terminates, we will continue to repurchase excess capital stock held by members on a quarterly basis but only if we maintain compliance with the financial and capital thresholds set forth in the Repurchase Plan, as previously disclosed in Note 17 - Capital Stock and Mandatorily Redeemable Capital Stock (MRCS) in our 2011 Form 10-K.

Our Board may not modify or terminate this resolution without written consent by the Director of the FHFA.

31

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 13 – Capital Stock and Mandatorily Redeemable Capital Stock (MRCS)

Capital Rules

For capital rules that were in effect prior to our conversion to our new Capital Plan on January 1, 2012, see Capital Rules prior to Conversion to New Capital Structure on page F-53 in our 2011 Form 10-K.

Under the new Capital Plan, which became effective January 1, 2012, our stock consists of two sub-classes of stock, Class B-1 stock and Class B-2 stock (together, Class B stock), both with a par value of $100 and redeemable on five years' written notice, subject to certain conditions.

Under the Capital Plan, each member is required to own capital stock in an amount equal to the greater of a membership stock requirement or an activity stock requirement, as further discussed in Capital Rules after Conversion to New Capital Structure on page F-53 in our 2011 Form 10-K. Membership stock requirements will continue to be recalculated annually, whereas the activity stock requirement will apply on a continuing basis.

We may only redeem or repurchase capital stock from a member if, following the redemption or repurchase, the member will continue to meet its minimum investment requirement and we remain in compliance with our regulatory capital requirements. As further discussed in Note 12 - Regulatory Actions, the Board of Directors has adopted a resolution which may not be amended without FHFA consent governing our repurchases of excess stock. Pursuant to that resolution, we are required to continue making quarterly repurchases of excess capital stock from members on a pro rata basis, subject to satisfaction of certain conditions. For as long as we continue to make such quarterly repurchases, we anticipate that individual members' requests for repurchase of excess Class B-2 Stock will not be fulfilled. Upon request we will continue to repurchase excess Class B-1 Stock that is in excess of a member's capital stock “floor.”

During the three and nine months ended September 30, 2012, we repurchased excess capital stock (including capital stock reclassified as MRCS) totaling $148 million and $798 million. At September 30, 2012, we had remaining excess capital stock of $301 million compared to $1.1 billion at December 31, 2011.

Although our Repurchase Plan terminated by its terms in May, 2012, pursuant to the resolution adopted our Board of Directors (as discussed in Note 12 - Regulatory Actions), we continue to repurchase excess capital stock held by members if we maintain compliance with financial and capital thresholds set forth in the Repurchase Plan as discussed in Repurchase of Excess Capital Stock on page F-56 in our 2011 Form 10-K. On October 15, 2012, following our assessment that we met the thresholds for repurchase based on the financial results for the third quarter of 2012, we notified members of another repurchase opportunity and the process for requesting repurchase. In accordance with that process, we announced that we plan to repurchase excess capital stock of $100 million on November 15, 2012.

Capital Concentration

As of September 30, 2012, BMO Harris Bank National Association held $236 million, or 14%, of our total capital stock outstanding. No other members had capital stock exceeding 10%.

Minimum Capital Requirements

After we implemented our new Capital Plan on January 1, 2012, we are required by regulation to maintain:

• permanent capital equal to the sum of our (i) credit risk capital requirement, (ii) market risk capital requirement, and (iii) operations risk capital requirement, all of which are calculated in accordance with rules and regulations of the FHFA. Permanent capital includes our retained earnings plus the amount paid in for our Class B stock, including Class B stock classified as mandatorily redeemable; and

• a minimum ratio of total regulatory capital (which includes permanent capital plus any general allowance for losses) to total assets of 4.0%; and

• a minimum ratio of leverage capital (which includes permanent capital multiplied by 1.5 plus any general allowance for losses) to total assets of 5.0%.

Total regulatory capital and permanent capital do not include accumulated other comprehensive income (loss). For further discussion of these minimum capital requirements, see Minimum Capital Requirements after Conversion to New Capital Structure on page F-54 of our 2011 Form 10-K.

32

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

The following table details our minimum capital requirements at September 30, 2012, under our new Capital Plan:

	September 30, 2012
	Required			Actual
Risk-based capital	$	1,516		$	3,305
Capital-to-assets ratio (regulatory)	4.00		%	4.97		%
Regulatory capital	$	2,658		$	3,305
Leverage capital-to-assets ratio (regulatory)	5.00		%	7.46		%
Leverage capital	$	3,322		$	4,957

Detailed components of our Risk-Based Capital were as follows:

	September 30, 2012
Credit risk	$	1,125
Market risk	41
Operations risk	350
Total risk-based capital requirement	$	1,516
Actual permanent capital	$	3,305

In addition, under the FHFA regulation on capital classifications and critical capital levels for the FHLBs, we are adequately capitalized.

At December 31, 2011, prior to conversion to our new Capital Plan, we were subject to a minimum regulatory leverage limit as further discussed in Minimum Capital Requirements prior to Conversion to New Capital Structure on page F-54 in our 2011 Form 10-K. The following table summarizes our regulatory capital requirements as a percentage of total assets at December 31, 2011, before the conversion to our new Capital Plan.

		Regulatory Capital plus Designated Amount of Subordinated Notes
		Requirement in Effect		Actual
	Non-Mortgage Assets	Ratio	Amount	Ratio	Amount
December 31, 2011	19.19%	4.76%	$3,392	6.35%	$4,527

Mandatorily Redeemable Capital Stock

We reclassify capital stock from equity to mandatorily redeemable capital stock (MRCS) under conditions as further described in Mandatorily Redeemable Capital Stock on page F-55 in our 2011 Form 10-K. As of April 18, 2012, we are no longer required to obtain FHFA approval for such redemptions and repurchases, as further discussed in Note 12 - Regulatory Actions.

The following table shows a reconciliation of the dollar amounts in MRCS, along with the number of current and former members owning the related capital stock at period end:

September 30, 2012	Dollar Amount
MRCS at beginning of year	$	4
Capital stock reclassified to MRCS	54
Redemption of MRCS	(48		)
MRCS at end of period a	$	10
Number of stockholders holding MRCS at period end	13

^a  All MRCS outstanding at the end of the period are redeemable in five years.

33

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 14 - Accumulated Other Comprehensive Income (Loss)

The following table summarizes the income (loss) in AOCI for the periods indicated:

	Net Unrealized on AFS		Non-credit OTTI on  AFS			Net Unrealized on HTM			Non-credit OTTI on HTM			Net Unrealized on Cash Flow Hedges			Post-Retirement Plans			Total
Balance, December 31, 2010	$	748	$	(34	)	$	(8	)	$	(630	)	$	(561	)	$	2		$	(483	)
Net change in the period	468		8			3			131			(500		)	—			110
Balance, September 30, 2011	$	1,216	$	(26	)	$	(5	)	$	(499	)	$	(1,061	)	$	2		$	(373	)
Balance, December 31, 2011	$	1,113	$	(26	)	$	(5	)	$	(466	)	$	(1,049	)	$	2		$	(431	)
Net change in the period	477		15			2			68			(93		)	(1		)	468
Balance, September 30, 2012	$	1,590	$	(11	)	$	(3	)	$	(398	)	$	(1,142	)	$	1		$	37

34

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 15- Fair Value Accounting

Fair Value Measurement

We record trading securities, AFS securities, derivative assets, and derivative liabilities at fair value. We also carry advances and consolidated obligations at fair value when we elect the fair value option for them. The fair value amounts recorded on the statements of condition and presented in the note disclosures have been determined by us using available market information and our judgment of appropriate valuation methods. These estimates are based on pertinent information available to us as of the dates presented. Estimates of the fair value of advances with options, mortgage instruments, derivatives with embedded options and consolidated obligation bonds with options using the methods described below, and other methods, are highly subjective and require judgments regarding significant matters such as the amount and timing of future cash flows, prepayment speed assumptions, expected interest rate volatility, possible distributions of future interest rates used to value options, and the selection of discount rates that appropriately reflect market and credit risks. The use of different assumptions could have a material effect on estimated fair value. Although we believe our estimated fair values are reasonable, there are inherent limitations in any valuation technique. Therefore, these fair values are not necessarily indicative of the amounts that would be realized in current market transactions, although they do reflect our judgment of how a market participant would estimate the fair values. These estimates are susceptible to material near term changes because they are made as of a specific point in time.

Fair Value Hierarchy

The fair value hierarchy is used to prioritize the valuation techniques as well as the inputs used to measure fair value for assets and liabilities carried at fair value on the statements of condition. The fair value hierarchy requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The inputs are evaluated and an overall level for the fair value measurement is determined. This overall level is an indication of market observability of the fair value measurement for the asset or liability.

Outlined below is the application of the fair value hierarchy to our financial assets and financial liabilities that are carried at fair value or disclosed in the notes to the financial statements:

Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that we can access at the measurement date.

Level 2inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. If the asset or liability has a specified (contractual) term, a Level 2 input must be observable for substantially the full term of the asset or liability. Level 2 inputs include the following:

a. Quoted prices for similar assets or liabilities in active markets

b. Quoted prices for identical or similar assets, or liabilities, in markets that are not active

c. Inputs other than quoted prices, that are observable for the asset or liability, for example:

1. Interest rates and yield curves observable at commonly quoted intervals

2. Implied volatilities

3. Credit spreads

d. Market-corroborated inputs.

Level 3 inputs are unobservable inputs for the asset or liability. Unobservable inputs are used to measure fair value to the extent that relevant observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date. However, the fair value measurement objective remains the same, that is, an exit price at the measurement date from the perspective of a market participant that holds the asset or owes the liability. Therefore, unobservable inputs shall reflect the assumptions that market participants would use when pricing the asset or liability, including assumptions about risk.

For instruments carried at fair value, we review the fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation attributes may result in a reclassification of financial assets or liabilities from one level to another. Such reclassifications are reported as transfers in/out at fair value as of the beginning of the quarter in which the changes occur. We had no such transfers for the periods presented.

35

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Valuation Techniques and Significant Inputs

A description of the valuation techniques and significant inputs is disclosed in Note 20 - Fair Value Accounting in our 2011 Form 10-K. There have been no significant changes in our valuation techniques since then.

Unobservable Level 3 significant inputs of financial instruments that are carried at fair value in our statements of condition are disclosed below.

Private-Label Residential MBS

The significant unobservable inputs used by third party pricing services in the fair value measurement of our private-label residential MBS are prepayment rates, probability of default, and loss severity in the event of default. Significant increases (decreases) in any of those inputs in isolation may result in a significantly lower (higher) fair value measurement. Generally, a change in the assumption used for the probability of default is accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for prepayment rates.

The table below provides the investment securities in which fair value is provided to us by third party pricing services.

				Range of Pricing Services Values
As of September 30, 2012	Portfolios	Fair Value		Minimum		Maximum
Private-label residential MBS - OTTI	AFS	$	69	$	62	$	75
Private-label residential MBS - OTTI	HTM	3		3		3

Derivative Assets

The following table shows the range of values for our derivative assets that are carried at fair value under a fair value hedge strategy on our statements of condition using Level 3 significant inputs.

As of September 30, 2012	Significant Inputs Curve	Fair Value
Derivative Assets	LIBOR	$	32

Consolidated obligations

The following table shows the applicable curve of our consolidated obligations that are carried at fair value under a fair value hedge strategy on our statements of condition using Level 3 significant inputs.

As of September 30, 2012	Significant Inputs Curve	Fair Value
Non-callable consolidated obligation bonds	CO	$	82

Impaired MPF Loans and Real Estate Owned

See Assets Measured at Fair Value on a Nonrecurring Basis on page 41.

36

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Fair Value Estimates for Financial Instruments

The following tables are a summary of fair value estimates and for the current period table the related level in the fair value hierarchy for financial instruments. It excludes non-financial items, for example, real estate owned. The carrying amounts in the following tables are recorded in the statements of condition under the indicated captions. These tables do not represent an estimate of the overall market value of us as a going concern; as they do not take into account future business opportunities and future net profitability of assets and liabilities. 

	September 30, 2012
			Fair Value
	Carrying  Value		Total		Level 1		Level 2			Level 3			Netting Adjustment/ Cash Collateral a
Financial Assets
Cash and due from banks	$	25	$	25	$	25	$	—		$	—		$	—
Federal Funds sold	1,948		1,948		—		1,948			—			—
Securities purchased under agreements to resell	3,049		3,049		—		3,049			—			—
Trading securities	2,685		2,685		—		2,685			—			—
Available-for-sale securities	23,829		23,829		—		23,760			69			—
Held-to-maturity securities	9,790		10,690		—		8,897			1,793			—
Advances	13,531		13,828		—		13,828			—			—
MPF Loans held in portfolio, net	11,266		12,205		—		11,997			208			—
Accrued interest receivable	127		127		—		127			—			—
Derivative assets	55		55		—		1,272		b	32		b	(1,249		)
Financial Liabilities
Deposits	$	730	$	730	$	—	$	730		$	—		$	—
Securities sold under agreements to repurchase	—		—		—		—			—			—
Consolidated obligations -
Discount notes	27,231		27,231		—		27,231			—			—
Bonds	33,366		35,304		—		35,222			82		c	—
Accrued interest payable	289		289		—		289			—			—
Mandatorily redeemable capital stock	10		10		10		—			—			—
Derivative liabilities	119		119		—		2,949			—			(2,830		)
Subordinated notes	1,000		1,137		—		1,137			—			—

^a  Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

^b  Our derivative assets are, in part, secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

^c  Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

37

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

	December 31, 2011
	Carrying Value		Fair Value
Financial Assets
Cash and due from banks	$	1,002	$	1,002
Federal Funds sold	950		950
Securities purchased under agreements to resell	825		825
Trading securities	2,935		2,935
Available-for-sale securities	24,316		24,316
Held-to-maturity securities	11,477		12,131
Advances	15,291		15,663
MPF Loans held in portfolio, net	14,118		15,177
Accrued interest receivable	153		153
Derivative assets	40		40
Financial Liabilities
Deposits	$	648	$	648
Securities sold under agreements to repurchase	400		400
Consolidated obligations -
Discount notes	25,404		25,404
Bonds	39,880		42,163
Accrued interest payable	203		203
Mandatorily redeemable capital stock	4		4
Derivative liabilities	206		206
Subordinated notes	1,000		1,127

38

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents, for each hierarchy level, our assets and liabilities that are measured at fair value on the statements of condition:

As of September 30, 2012	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	2,545			$	—			$	—		$	2,545
GSE residential MBS	—		137				—				—			137
Governmental-guaranteed residential MBS	—		3				—				—			3
Total Trading Securities	—		2,685				—				—			2,685
AFS securities:
U.S. Government & other government related	—		776				—				—			776
FFELP ABS	—		7,687				—				—			7,687
GSE residential MBS	—		12,326				—				—			12,326
Government-guaranteed residential MBS	—		2,971				—				—			2,971
Private-label residential MBS	—		—				69				—			69
Total AFS Securities	—		23,760				69				—			23,829
Advances	—		9				—				—			9
Derivative assets	—		1,272			b	32			b	(1,249		)	55
Total assets at fair value	$	—	$	27,726			$	101			$	(1,249	)	$	26,578
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation discount notes	$	—	$	(2,258	)		$	—			$	—		$	(2,258	)
Consolidated obligation bonds	—		(855		)		(82		)	c	—			(937		)
Derivative liabilities	—		(2,949		)	b	—				2,830			(119		)
Total liabilities at fair value	$	—	$	(6,062	)		$	(82	)		$	2,830		$	(3,314	)
Level 3 as a percent of total liabilities at fair value							2.5		%

^a  Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

^b  Our derivative assets are, in part secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

^c  Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

39

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

As of December 31, 2011	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	2,737			$	—			$	—		$	2,737
GSE residential MBS	—		195				—				—			195
Governmental-guaranteed residential MBS	—		3				—				—			3
Total Trading Securities	—		2,935				—				—			2,935
AFS securities:
U.S. Government & other government related	—		1,001				—				—			1,001
FFELP ABS	—		8,159				—				—			8,159
GSE residential MBS	—		12,132				—				—			12,132
Government-guaranteed residential MBS	—		2,961				—				—			2,961
Private-label residential MBS	—		—				63				—			63
Total AFS Securities	—		24,253				63				—			24,316
Advances	—		9				—				—			9
Derivative assets	—		1,562			b	37			b	(1,559		)	40
Total assets at fair value	$	—	$	28,759			$	100			$	(1,559	)	$	27,300
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation discount notes	$	—	$	(11,466	)		$	—			$	—		$	(11,466	)
Consolidated obligation bonds	—		(2,631		)		(87		)	c	—			(2,718		)
Derivative liabilities	—		(2,888		)	b	—				2,682			(206		)
Total liabilities at fair value	$	—	$	(16,985	)		$	(87	)		$	2,682		$	(14,390	)
Level 3 as a percent of total liabilities at fair value							0.6		%

^a  Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

^b  Our derivative assets are, in part, secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

^c  Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

40

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Level 3 Disclosures for all Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The following table presents a reconciliation of all assets and liabilities that are measured at fair value on the statements of condition using significant unobservable inputs (Level 3):

	Level 3 Assets/Liabilities
	Available-For-Sale Private-Label MBS			Derivative Assets Interest-Rate Related			Consolidated Obligation Bonds
At December 31, 2011	$	63		$	37		$	(87	)
Gains (losses) realized and unrealized:
Change in fair value included in earnings in derivatives and hedging activities	—			(5		)	5
Included in net change in fair value on OTTI AFS securities in OCI	16			—			—
Paydowns and settlements	(10		)	—			—
At September 30, 2012	$	69		$	32		$	(82	)
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	$	—		$	(5	)	$	5
At December 31, 2010	$	76		$	29		$	(78	)
Gains (losses) realized and unrealized:
Change in fair value included in earnings in derivatives and hedging activities	—			7			(7		)
Included in net change in fair value on OTTI AFS securities in OCI	2			—			—
Paydowns and settlements	(11		)	—			—
At September 30, 2011	$	67		$	36		$	(85	)
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	$	—		$	7		$	(7	)

Assets Measured at Fair Value on a Nonrecurring Basis

The table below presents assets that are measured at fair value on a nonrecurring basis as of the dates shown. These assets are subject to being measured at fair value as a result of becoming impaired during the reporting period or in the case of REO when fair value declines during the reporting period. Held-to-maturity, private-label residential MBS are measured at fair value using the same methodology and significant assumptions utilized for available-for-sale private-label residential MBS. If available, broker price opinions are used to measure impaired MPF Loans or REO. If a current broker price opinion is not available, we estimate fair value based on current actual loss severity rates we have incurred on sales, excluding any estimated selling costs. See Note 8 - Allowance for Credit Losses for further details. Significant increases (decreases) in the loss severity rate input in isolation may result in a significantly lower (higher) fair value measurement.

	September 30, 2012						December 31, 2011
	Level 1		Level  2		Level  3		Level 1		Level  2		Level  3
Held-to-maturity - Private-label residential MBS	$	—	$	—	$	3	$	—	$	—	$	9
Impaired MPF Loans	—		—		208		—		—		193
Real estate owned	—		—		18		—		—		16
Total non-recurring assets	$	—	$	—	$	229	$	—	$	—	$	218

41

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Fair Value Option

We elected the fair value option for advances, discount notes, and short-term consolidated obligation bonds for which hedge accounting treatment may not be achieved. Specifically, hedge accounting may not be achieved in cases where it may be difficult to pass prospective or retrospective effectiveness testing under derivative hedge accounting guidance even though the interest rate swaps used to hedge these financial instruments have matching terms. Accordingly, electing the fair value option allows us to better match the change in fair value of the advance, discount note, and short-term consolidated obligation bonds with the interest rate swap economically hedging it.

Under the fair value option, fair value is used for both the initial and subsequent measurement of the designated assets and liabilities, with the changes in fair value recognized in non-interest gain (loss). Interest income and interest expense carried on other financial assets or liabilities carried at fair value is recognized under the interest method based solely on the contractual amount of interest due or unpaid. Any transaction fees or costs are immediately recognized into other non-interest gain (loss) or other non-interest expense.

The following tables summarize the activity related to financial assets and liabilities for which we elected the fair value option: 

	September 30, 2012								September 30, 2011
			Consolidated Obligation								Consolidated Obligation
	Advances		Bonds			Discount Notes			Advances		Bonds			Discount Notes
For the three months ended
Balance beginning of period	$	9	$	(7,017	)	$	(4,135	)	$	9	$	(4,073	)	$	(1,202	)
New transactions elected for fair value option	—		(6,300		)	—			—		(4,885		)	(5,499		)
Maturities and extinguishments	—		12,465			1,878			—		4,150			100
Net gain (loss) on instruments held at fair value	—		(6		)	—			—		—			—
Change in accrued interest and other	—		3			(1		)	—		(4		)	(2		)
Balance end of period	$	9	$	(855	)	$	(2,258	)	$	9	$	(4,812	)	$	(6,603	)
For the nine months ended
Balance beginning of period	$	9	$	(2,631	)	$	(11,466	)	$	4	$	(9,425	)	$	(4,864	)
New transactions elected for fair value option	—		(15,190		)	—			5		(9,044		)	(5,649		)
Maturities and extinguishments	—		16,965			9,214			—		13,669			3,916
Net gain (loss) on instruments held at fair value	—		—			2			—		(13		)	—
Change in accrued interest and other	—		1			(8		)	—		1			(6		)
Balance end of period	$	9	$	(855	)	$	(2,258	)	$	9	$	(4,812	)	$	(6,603	)

For items recorded under the fair value option, the related contractual interest income and contractual interest expense is recorded as part of net interest income on the statements of income. The remaining change in fair value for instruments in which the fair value option has been elected is recorded in non-interest gain (loss) on instruments held under fair value option in the statements of income. We determined that no adjustments to the fair values of our instruments recorded under the fair value option for instrument-specific credit risk were necessary as of the dates presented.

The following table reflects the difference between the aggregate unpaid principal balance (UPB) outstanding and the aggregate fair value for advances and consolidated obligation bonds for which the fair value option has been elected. None of the advances were 90 days or more past due and none were on nonaccrual status.

	September 30, 2012								December 31, 2011
As of	Unpaid Principal Balance			Fair Value			Fair Value Over (Under) UPB		Unpaid Principal Balance			Fair Value			Fair Value Over (Under) UPB
Advances	$	9		$	9		$	—	$	9		$	9		$	—
Consolidated obligation bonds	(855		)	(855		)	—		(2,630		)	(2,631		)	1
Consolidated obligation discount notes	(2,258		)	(2,258		)	—		(11,465		)	(11,466		)	1

42

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

(Dollars in millions except per share amounts unless otherwise indicated)

Note 16 – Commitments and Contingencies

The following table shows our commitments outstanding but not yet incurred or recorded in our statements of condition.

As of	September 30, 2012						December 31, 2011
	Expire within one year		Expire after one year		Total		Expire within one year		Expire after one year		Total
Unsettled consolidated obligation bonds	$	2,926	$	—	$	2,926	$	150	$	—	$	150
Member standby letters of credit	344		293		637		296		273		569
Housing authority standby bond purchase agreements	50		387		437		44		282		326
MPF Xtra mortgage purchase commitments which will be concurrently resold to Fannie Mae	748		—		748		250		—		250
MPF Loan mortgage purchase commitments for portfolio	3		—		3		1		—		1
Advance commitments	7		214		221		—		—		—
Total	$	4,078	$	894	$	4,972	$	741	$	555	$	1,296

Note 17 – Transactions with Members and Other FHLBs

Related Parties

We are a member-owned cooperative. We define related parties as members that own 10% or more of our capital stock or members whose officers or directors also serve on our Board of Directors. Capital stock ownership is a prerequisite to transacting any member business with us. Members and former members own all of our capital stock.

We conduct our advances business almost exclusively with members. Therefore, in the normal course of business, we extend credit to members whose officers and directors may serve on our Board of Directors. We extend credit to members whose officers or directors may serve as our directors on market terms that are no more favorable to them than the terms of comparable transactions with other members who are not considered related parties. In addition, we may purchase short-term investments, Federal Funds, and MBS from members (or affiliates of members). All investments are market rate transactions and all MBS are purchased through securities brokers or dealers. Derivative transactions with members and affiliates are executed at market rates.

Members

The table below summarizes balances we had with our members as defined above as related parties (including their affiliates) as reported in the statements of condition as of the dates indicated. Members represented in these tables may change between periods presented, to the extent that our related parties change, based on changes in the composition of our Board membership.

	September 30, 2012		December 31, 2011
Assets - Advances	$	2,495	$	3,515
Liabilities - Deposits	97		69
Equity - Capital Stock	250		399

Other FHLBs

Material amounts of transactions with other FHLBs, if any, are parenthetically identified on the face of our Financial Statements.

43

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations.

Selected Financial Data

As of or for the three months ended	September 30, 2012			June 30, 2012			March 31, 2012			December 31, 2011				September 30, 2011
Selected statements of condition data
Total investments a	$	41,301		$	40,336		$	40,182		$	40,503			$	43,142
Advances	13,531			15,797			14,739			15,291				14,294
MPF Loans held in portfolio	11,310			12,210			13,181			14,163				15,246
Allowance for credit losses	(44		)	(48		)	(49		)	(45		)		(41		)
Total assets	66,444			68,641			68,908			71,255				73,251
Consolidated obligations -
Discount notes	27,231			23,439			22,424			25,404				19,830
Bonds	33,366			39,872			41,048			39,880				45,880
Total consolidated obligations, net	60,597			63,311			63,472			65,284				65,710
Mandatorily redeemable capital stock	10			10			14			4				530
Capital stock	1,702			1,850			1,908			2,402				2,390
Total retained earnings	1,593			1,504			1,436			1,321				1,305
Accumulated other comprehensive income (loss)	37			(221		)	(387		)	(431		)		(373		)
Total capital	3,332			3,133			2,957			3,292				3,322
Other selected data at period end
MPF Xtra loan volume funded - total system	$	2,027		$	1,334		$	1,170		$	1,281			$	768
MPF Xtra loan volume funded - Chicago PFIs	1,044			709			683			775				494
MPF Xtra loans outstanding b	9,861			8,630			7,863			7,234				6,652
Regulatory capital to assets ratio c	4.97		%	4.90		%	4.87		%	6.35		%		6.86		%
Market value of equity to book value of equity	103		%	97		%	94		%	90		%		92		%
All FHLBs consolidated obligations outstanding (par)	$	674,487		$	685,195		$	658,015		$	691,868			$	696,606
Number of members	764			767			767			767				766
Total employees (full and part time)	318			312			301			296				300
Total investments as a percent of total assets	62		%	59		%	58		%	57		%		59		%
Advances as a percent of total assets	20		%	23		%	21		%	21		%		20		%
MPF Loans as a percent of total assets	17		%	18		%	19		%	20		%		21		%
Selected statements of income data
Net interest income before provision for credit losses	$	140		$	138		$	159		$	148			$	134
Provision for credit losses	—			2			6			7				3
OTTI (loss), credit portion	—			(14		)	(1		)	(11		)		(14		)
Other non-interest gain (loss) excluding OTTI	(12		)	(13		)	7			(23		)		75
Non-interest expense	28			32			30			83			d	36
Net income	90			69			116			16				141
Cash dividends	1			1			1			—			*	1
Selected annualized ratios and data
Return on average assets - Quarter	0.53		%	0.39		%	0.66		%	0.09		%		0.75		%
Return on average assets - Year to date	0.52		%	0.52		%	0.66		%	0.28		%		0.34		%
Return on average equity - Quarter	14.25		%	9.28		%	15.93		%	2.07		%		17.45		%
Return on average equity - Year to date	13.08		%	12.57		%	15.93		%	7.22		%		8.92		%
Average equity to average assets	3.71		%	4.21		%	4.11		%	4.21		%		4.31		%
Non-interest expense to average assets	0.16		%	0.18		%	0.17		%	0.45		%		0.19		%
Net yield on interest-earning assets	0.84		%	0.80		%	0.91		%	0.82		%		0.73		%
Return on average Regulatory Capital spread to three month LIBOR index	10.34		%	7.76		%	12.63		%	1.10		%		13.28		%
Dividend payout ratio	1.59		%	1.92		%	0.52		%	3.56		%		0.41		%

^*  Less than $1 million

^a  Total investments includes investment securities, Federal Funds sold, and securities purchased under agreements to resell.

^b  MPF Xtra outstanding loans are not held on our statements of condition. MPF Xtra loans purchased from PFIs are concurrently sold to Fannie Mae. See MPF Program Design beginning on page 10 in our 2011 Form 10-K.

^c  Effective January 1, 2012, we implemented a new Capital Plan that resulted in a change to the calculation of our regulatory capital to assets ratio. See Note 13 - Capital Stock and Mandatorily Redeemable Capital Stock (MRCS) to the financial statements in this Form 10-Q.

^d  December 31, 2011, non-interest expense included an additional $50 million charge for AHP. See Note 13 - Affordable Housing Program (AHP) to the financial statements in our 2011 Form 10-K.

44

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Forward-Looking Information

Statements contained in this report, including statements describing the objectives, projections, estimates, or future predictions of management, may be “forward-looking statements.” These statements may use forward-looking terminology, such as “anticipates,” “believes,” “expects,” “could,” “estimates,” “may,” “should,” “will,” their negatives, or other variations of these terms. We caution that, by their nature, forward-looking statements involve risks and uncertainties related to our operations and business environment, all of which are difficult to predict and many of which are beyond our control. These risks and uncertainties could cause actual results to differ materially from those expressed or implied in these forward-looking statements and could affect the extent to which a particular objective, projection, estimate, or prediction is realized. As a result, undue reliance should not be placed on such statements.

These forward-looking statements involve risks and uncertainties including, but not limited to, the following:

• our ability to stabilize our capital base after implementing our new capital structure, our ability to meet required conditions to repurchase and redeem capital stock from our members (including maintaining compliance with our minimum regulatory capital requirements and determining that our financial condition is sound enough to support such repurchases), and the amount and timing of such repurchases or redemptions;

• the effect of the resolution by our Board of Directors impacting the level of our dividends and retained earnings;

• changes in the demand by our members for advances, including the impact of the availability of other sources of funding for our members, such as deposits; 

• limits on our investments in long-term assets;

• the impact of new business strategies, including our ability to develop and implement business strategies focused on maintaining net interest income; the impact of our efforts to simplify our balance sheet on our market risk profile and future hedging costs; our ability to successfully transition to a new business model, implement business process improvements and scale the size of the Bank to our members' borrowing needs; the extent to which our members use our advances as part of their core financing rather than just as a back-up source of liquidity;

• general economic and market conditions, including the timing and volume of market activity, inflation/deflation, unemployment rates, housing prices, the condition of the mortgage and housing markets, increased delinquencies and/or loss rates on mortgages, prolonged or delayed foreclosure processes, and the effects on, among other things, mortgage-backed securities; volatility resulting from the effects of, and changes in, various monetary or fiscal policies and regulations, such as those determined by the Federal Reserve Board and Federal Deposit Insurance Corporation; impacts from various measures to stimulate the economy and help borrowers refinance home mortgages and student loans; disruptions in the credit and debt markets and the effect on future funding costs, sources, and availability;

• volatility of market prices, rates, and indices, or other factors, such as natural disasters, that could affect the value of our investments or collateral; changes in the value or liquidity of collateral securing advances to our members;

• changes in the value of and risks associated with our investments in mortgage loans, mortgage-backed securities, and FFELP ABS and the related credit enhancement protections;

• changes in our ability or intent to hold mortgage-backed securities to maturity;

• changes in mortgage interest rates and prepayment speeds on mortgage assets;

• membership changes, including the withdrawal of members due to restrictions on our dividends and redemptions or repurchase of our capital stock or the loss of members through mergers and consolidations; changes in the financial health of our members, including the resolution of some members; risks related to expanding our membership to include more institutions with regulators and resolution processes with which we have less experience;

45

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

• changes in investor demand for consolidated obligations and/or the terms of interest rate derivatives and similar agreements, including changes in the relative attractiveness of consolidated obligations as compared to other investment opportunities; changes in our cost of funds due to Congressional deliberations on the overall U.S. debt burden, including concerns over U.S. fiscal policy and the "fiscal cliff," and any related rating agency actions impacting FHLB consolidated obligations;

• political events, including legislative, regulatory, judicial, or other developments that affect us, our members, our counterparties and/or investors in consolidated obligations, including, among other things, the Dodd-Frank Wall Street Reform and Consumer Protection Act and related regulations and proposals and legislation related to housing finance and GSE reform; changes by our regulator and changes in the FHLB Act or applicable regulations as a result of the Housing and Economic Recovery Act of 2008 (Housing Act) or as may otherwise be issued by our regulator; the potential designation of the Bank as a nonbank financial company for supervision by the Federal Reserve;

• the ability of each of the other FHLBs to repay the principal and interest on consolidated obligations for which it is the primary obligor and with respect to which we have joint and several liability;

• the pace of technological change and our ability to develop and support technology and information systems; our ability to attract and retain skilled employees;

• the impact of new accounting standards and the application of accounting rules, including the impact of regulatory guidance on our application of such standards and rules;

• the volatility of reported results due to changes in the fair value of certain assets and liabilities; and

• our ability to identify, manage, mitigate, and/or remedy internal control weaknesses and other operational risks.

For a more detailed discussion of the risk factors applicable to us, see Risk Factors in our 2011 Form 10-K on page 24.

These forward-looking statements are representative only as of the date they are made, and we undertake no obligation to update any forward-looking statement as a result of new information, future events, changed circumstances, or any other reason.

46

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Executive Summary

Third Quarter 2012 Financial Highlights

• We recorded net income of $90 million for the third quarter of 2012, 36% less than net income of $141 million in the third quarter of 2011, a quarter characterized by significant gains on hedging activities and a settlement related to a dispute over some of our private-label MBS. Year-to-date net income of $275 million is 32% ahead of net income of $208 million for the first three quarters of 2011. Earnings for the third quarter are the result of a strong base of net interest income, reduced OTTI charges (less than $1 million compared to $14 million in the third quarter of last year), and an increase in prepayment fee income. Net interest income of $140 million was 7% higher than net interest income of $131 million in the third quarter of last year, in part because maturing debt was reissued at lower rates. While we continue to generate sound net interest income, we cannot predict the impact on future earnings of prepayment fees, OTTI credit losses, or hedging expenses.

• Advances outstanding at September 30, 2012, were $13.5 billion, 12% lower than the year-end level of $15.3 billion, primarily due to lower borrowings from a few of our largest members. Increasing advances and sustaining increased levels of advances are fundamental to the success of our strategic transformation, but we recognize that we must invest time to bring on new members and introduce current members to new solutions that use advances as part of their ongoing funding strategies. We have added 12 new members in 2012, including five insurance companies, four banks, and three credit unions. An additional insurance company is currently in the process of applying for membership. We are talking to all of our members - including those with significant liquidity on their balance sheets - about how advances can benefit their long-term earnings and interest rate risk management goals even in the current low-rate environment.

• MPF Loans held in portfolio were $11.3 billion at the end of the third quarter, down $2.8 billion (20%) from $14.1 billion at year-end 2011. The reduction is consistent with our 2008 decision not to add MPF Loans to our balance sheet. MPF Xtra loan volume was $1.0 billion for our PFIs and $2.0 billion for the program overall during the quarter. In addition, some members are selling loans through traditional risk-sharing MPF products, which are participated to another FHLB.

• Total investment securities decreased $2.4 billion (6%) from year-end 2011 to $36.3 billion at the end of the third quarter of 2012, as investments matured or paid down. Total assets fell $4.8 billion (7%) from year-end 2011 to $66.4 billion at September 30, 2012. We anticipate that the overall size of the Bank will continue to fall as MPF Loans and investment securities mature or pay down.

• As a result of our net income, our retained earnings have grown to $1.6 billion, providing a level of protection for member capital. In addition, our profitable results and retained earnings have made it possible to fulfill our commitment to return liquidity to members' investments in the Bank through the repurchase and redemption of $1.4 billion in capital stock since late 2011. We have announced that we plan to repurchase $100 million of excess capital stock on November 15, 2012

• We are in compliance with all of our regulatory capital requirements.

Summary and Outlook

Our overarching goal is to build a member-focused Bank: one that delivers the products and services that members need to effectively manage their organizations and offer competitive products to their communities. To succeed, we need to remain financially strong and profitable while limiting our risks. Our focus is to:

• Deliver the value of our funding advantage through our products and services while paying a reasonable return on members' capital investment in the Bank;

• Develop new advances, products, structures and solutions;

• Maximize member borrowing capacity through the expansion of collateral and enhancement of collateral value;

• Make it easier to transact business with us;

• Expand the product options of and member participation in the MPF Program; and

• Integrate our community investment programs with our members' social investment goals.

47

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Results of Operations

Net Interest Income

Net interest income is the difference between interest income that we receive on our interest earning assets and the interest expense we pay on interest bearing liabilities after accounting for the following in accordance with GAAP:

• Net interest paid or received on interest rate swaps that are accounted for as fair value or cash flow hedges;

• Amortization of premiums;

• Accretion of discounts;

• Amortization of hedge adjustments;

• Advance prepayment fees; and

• MPF credit enhancement fees.

The tables below present the increase or decrease in interest income and expense before the provision for credit losses due to volume or rate variances. Any change due to the combined volume/rate variance has been allocated ratably to volume and rate. The calculation of these components includes the following considerations:

• Average daily balances are computed using historical amortized cost balances except for items carried under the fair value option which include changes in fair value.

• MPF Loans held in portfolio that are on nonaccrual status are included in average daily balances used to determine the effective yield/rate. Interest income on MPF Loans includes amortization as detailed in MPF Loans Held in Portfolio, net on page 56. 

• Interest and effective yield/rate includes all components of net interest income as discussed above. Yields/rates are calculated on an annualized basis.

	September 30, 2012							September 30, 2011							Increase (decrease) due to
For the three months ended	Average Balance		Total Interest			Yield/ Rate		Average Balance		Total Interest			Yield/ Rate		Volume			Rate			Net Change
Federal Funds sold, securities purchased under agreements to resell and deposit income	$	6,397	$	2		0.13	%	$	4,812	$	1		0.08	%	$	—		$	1		$	1
Investment securities	35,054		274			3.13	%	38,938		309			3.17	%	(31		)	(4		)	(35		)
Advances	14,066		65			1.85	%	14,277		68			1.91	%	(1		)	(2		)	(3		)
MPF Loans held in portfolio	11,514		125			4.34	%	15,378		181			4.71	%	(45		)	(11		)	(56		)
Total Interest Income on Assets	67,031		466			2.78	%	73,405		559			3.05	%	(77		)	(16		)	(93		)
Deposits	741		—		*	—	%	701		—		*	—	%	—			—			—
Securities sold under agreements to repurchase	—		—			—	%	1,200		4			1.33	%	(4		)	—			(4		)
Consolidated obligation discount notes	25,779		77			1.19	%	15,530		88			2.27	%	58			(69		)	(11		)
Consolidated obligation bonds	37,430		235			2.51	%	51,913		318			2.45	%	(89		)	6			(83		)
Mandatorily redeemable capital stock	10		—		*	0.30	%	532		—		*	0.10	%	—			—			—
Subordinated notes	1,000		14			5.60	%	1,000		15			6.00	%	—			(1		)	(1		)
Total Interest Expense on Liabilities	64,960		326			2.01	%	70,876		425			2.40	%	(35		)	(64		)	(99		)
Net yield on interest-earning assets	$	67,031	$	140		0.84	%	$	73,405	$	134		0.73	%	$	(42	)	$	48		$	6

* Less than $1 million

48

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

	September 30, 2012							September 30, 2011							Increase (decrease) due to
For the nine months ended	Average Balance		Total Interest			Yield/ Rate		Average Balance		Total Interest			Yield/ Rate		Volume			Rate			Net Change
Federal Funds sold, securities purchased under agreements to resell and deposit income	$	5,652	$	6		0.14	%	$	8,298	$	7		0.11	%	$	(2	)	$	1		$	(1	)
Investments	35,785		855			3.19	%	38,699		932			3.21	%	(70		)	(7		)	(77		)
Advances	14,784		194			1.75	%	16,398		203			1.65	%	(20		)	11			(9		)
MPF Loans held in portfolio	12,421		421			4.52	%	16,246		572			4.69	%	(135		)	(16		)	(151		)
Total Interest Income on Assets	68,642		1,476			2.87	%	79,641		1,714			2.87	%	(227		)	(11		)	(238		)
Deposits	711		—		*	—	%	733		—		*	—	%	—			—			—
Securities sold under agreements to repurchase	41		—			—	%	1,200		13			1.44	%	(13		)	—			(13		)
Consolidated obligation discount notes	25,793		230			1.19	%	20,164		278			1.84	%	78			(126		)	(48		)
Consolidated obligation bonds	38,777		766			2.63	%	53,517		991			2.47	%	(273		)	48			(225		)
Mandatorily redeemable capital stock	9		—		*	0.22	%	531		—		*	0.10	%	—			—			—
Subordinated notes	1,000		43			5.73	%	1,000		43			5.73	%	—			—			—
Total Interest Expense on Liabilities	66,331		1,039			2.09	%	77,145		1,325			2.29	%	(208		)	(78		)	(286		)
Net yield on interest-earning assets	$	68,642	$	437		0.85	%	$	79,641	$	389		0.65	%	$	(19	)	$	67		$	48

* Less than $1 million

Net interest income changed mainly due to the following:

• Investment income declined primarily due to the decline in average investment balances as securities matured or paid down with proceeds primarily being used to pay down our consolidated obligations as well as to redeem our capital stock rather than being reinvested in investment securities. Yields on securities also declined slightly in line with market conditions. In connection with the approval of our Capital Plan the FHFA now requires, and our Board has passed, a resolution requiring us to obtain FHFA approval for any new investmentsthat have a term to maturity in excess of 270 days until such time as our MBS portfolio is less than three times our total regulatory capital and our advances represent more than 50% of our total assets. For further discussion of how this may impact us, see Risk Factors on page 24 in our 2011 Form 10-K. We expect our investment portfolio to continue to decline over time as a result of this limitation and as we continue to make repurchases and redemptions of excess capital stock.

• Interest income from advances decreased compared to the prior year primarily due to the decline in average outstanding balances as members either prepaid their advance balances or elected not to renew advances that matured during this time. Yield on advances for the comparative three months ended September 30 declined in line with the overall weakness in global market interest rates, although partially offset by slightly higher advance prepayment fees of $19 million, net, compared to $15 million a year ago. Comparative yields for the nine months ended September 30 show an increase due to an elevated level of prepayment fees of $54 million, net, compared to $20 million a year ago. We recognized increased prepayment fee income in 2012 compared to the same periods of 2011, primarily attributable to members electing to restructure their outstanding advances with us to take advantage of the extended low interest rate environment in 2012. Specifically, the majority of these restructurings were treated as new advances for accounting purposes and the related prepayment fees were immediately recognized as prepayment fee income in the period of termination.

• Interest income from MPF Loans continued to decline as expected relative to the decreased level of MPF Loans outstanding as a result of our ongoing strategy to not add MPF Loans to our balance sheet, except for a small amount of loans being acquired under our affordable housing programs. MPF Loans are paying down at a fairly steady rate. Yields on MPF Loans declined slightly as the higher yield loans in our portfolio are experiencing a higher prepayment rate relative to lower yielding loans. We expect these trends to continue.

• The decline in interest income was more than offset by the reduction in interest expense on our consolidated obligations. This reduction resulted in part from calling higher priced debt that was no longer needed due to our reduced funding needs for investments, advances, and MPF Loans. We were able to fund our balance sheet with consolidated obligation discount notes issued at lower interest rates relative to prior periods.

49

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Net interest income was also impacted by fair value and cash flow hedging activity. Specifically, the low interest rate environment continued to result in negative net interest settlements attributable to open derivative hedging activity and the amortization of hedge adjustments of closed derivative hedging activity into net interest income also reduced net interest income. See the tables of Trading Securities, Derivatives and Hedging Activities, and Instruments Held at Fair Value Option starting on page 51 for further details.

Non-Interest Gain (Loss)

	Three months						Nine Months
For the periods ended September 30,	2012			2011			2012			2011
OTTI impairment charges, credit portion	$	—		$	(14	)	$	(15	)	$	(57	)
Trading securities	(10		)	(18		)	(35		)	(40		)
Derivatives and hedging activities	(1		)	95			2			77
Instruments held at fair value option	(6		)	—			2			(13		)
Early extinguishment of debt	—			(21		)	—			(21		)
Other, net
MPF Xtra and other MPF administration fees	4			2			9			7
All other	1			17			4			18
Total non-interest gain (loss)	$	(12	)	$	61		$	(33	)	$	(29	)

OTTI impairment charges, credit portion

The amount of impairment charges declined as the economic conditions, and thus the significant inputs used to value our securities, were relatively consistent from the fourth quarter of 2011 through the third quarter of 2012. Although we actively monitor the credit quality of our MBS, it is not possible to predict whether we will have additional OTTI charges in the future. Future changes will depend on many factors including economic, financial market, and housing market conditions; and the actual and projected performance of the loan collateral underlying our MBS. If delinquency and/or loss rates on mortgages loans continue to increase, and/or there is a further decline in residential real estate values, we could experience reduced yields or additional losses on these investment securities. Further, increases in the time period for processing foreclosures and foreclosure delays by several major mortgage servicers may result in loss severities beyond current expectations. See Note 5 - Investment Securities to the financial statements for further details on our OTTI, including the significant inputs used to model our impairment calculations in a base case scenario. Also see Critical Accounting Policies and Estimates on page 61 for a discussion on the sensitivity of OTTI to an adverse case scenario.

50

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Trading Securities, Derivatives and Hedging Activities, and Instruments Held at Fair Value Option

Details on the impact of these items, which include hedge ineffectiveness and economic hedge activity, are detailed in the following tables. 

										Consolidated Obligation
	Advances			Investments			Mortgage Loans			Discount Notes			Bonds			Total
Three months ended September 30, 2012
Amortization/accretion of hedging activities	$	3		$	—		$	(12	)	$	(1	)	$	(7	)	$	(17	)
Net interest settlements a	(19		)	(33		)	—			(67		)	31			(88		)
Total hedging activities recorded in net interest income	(16		)	(33		)	(12		)	(68		)	24			(105		)
Fair value hedges	2			1			—			—			(3		)	—
Cash flow hedges	—			—			—			—			—			—
Economic hedges	—			—			(6		)	1			4			(1		)
Total recorded in derivatives and hedging activities	2			1			(6		)	1			1			(1		)
Derivative related amounts recorded in non-interest gain (loss) on -
Trading securities - hedged	—			(8		)	—			—			—			(8		)
Instruments held under fair value option	—			—			—			—			(6		)	(6		)
Total net effect of hedging activities	$	(14	)	$	(40	)	$	(18	)	$	(67	)	$	19		$	(120	)
Trading securities - unhedged				$	(2	)										$	(2	)
Three months ended September 30, 2011
Amortization/accretion of hedging activities	$	(38	)	$	—		$	(12	)	$	(5	)	$	(13	)	$	(68	)
Net interest settlements a	(29		)	(36		)	(1		)	(80		)	79			(67		)
Total hedging activities recorded in net interest income	(67		)	(36		)	(13		)	(85		)	66			(135		)
Fair value hedges	1			(12		)	2			—			(5		)	(14		)
Cash flow hedges	25			—			—			1			—			26
Economic hedges	—			(2		)	73			(1		)	13			83
Total recorded in derivatives and hedging activities	26			(14		)	75			—			8			95
Derivative related amounts recorded in non-interest gain (loss) on -
Trading securities - hedged	—			(16		)	—			—			—			(16		)
Instruments held under fair value option	—			—			—			—			—			—
Total net effect of hedging activities	$	(41	)	$	(66	)	$	62		$	(85	)	$	74		$	(56	)
Trading securities - unhedged				$	(2	)										$	(2	)

^a  Represents interest income or expense on derivatives included in net interest income of the hedged item.

51

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

										Consolidated Obligation
	Advances			Investments			Mortgage Loans			Discount Notes			Bonds			Total
Nine months ended September 30, 2012
Amortization/accretion of hedging activities	$	(13	)	$	—		$	(39	)	$	(7	)	$	(26	)	$	(85	)
Net interest settlements a	(64		)	(98		)	(2		)	(202		)	111			(255		)
Total hedging activities recorded in net interest income	(77		)	(98		)	(41		)	(209		)	85			(340		)
Fair value hedges	7			(1		)	1			—			(9		)	(2		)
Cash flow hedges	—			—			—			2			—			2
Economic hedges	—			—			(13		)	7			8			2
Total recorded in derivatives and hedging activities	7			(1		)	(12		)	9			(1		)	2
Derivative related amounts recorded in non-interest gain (loss) on -
Trading securities - hedged	—			(32		)	—			—			—			(32		)
Instruments held under fair value option	—			—			—			2			—			2
Total net effect of hedging activities	$	(70	)	$	(131	)	$	(53	)	$	(198	)	$	84		$	(368	)
Trading securities - unhedged				$	(3	)										$	(3	)
Nine months ended September 30, 2011
Amortization/accretion of hedging activities	$	(25	)	$	—		$	(37	)	$	(15	)	$	(33	)	$	(110	)
Net interest settlements a	(115		)	(103		)	(6		)	(241		)	239			(226		)
Total hedging activities recorded in net interest income	(140		)	(103		)	(43		)	(256		)	206			(336		)
Fair value hedges	8			(14		)	(6		)	—			(3		)	(15		)
Cash flow hedges	37			—			—			3			—			40
Economic hedges	(1		)	(4		)	21			1			35			52
Total recorded in derivatives and hedging activities	44			(18		)	15			4			32			77
Derivative related amounts recorded in non-interest gain (loss) on -
Trading securities - hedged	—			(35		)	—			—			—			(35		)
Instruments held under fair value option	—			—			—			—			(13		)	(13		)
Total net effect of hedging activities	$	(96	)	$	(156	)	$	(28	)	$	(252	)	$	225		$	(307	)
Trading securities - unhedged				$	(5	)										$	(5	)

^a  Represents interest income or expense on derivatives included in net interest income of the hedged item.

Hedging Activities Recorded in Net Interest Income

• Net interest income was negatively impacted primarily due to the low interest rate environment resulting in negative net interest settlements on derivative contracts in active hedge accounting relationships. Net interest income was also reduced by the amortization of negative hedge adjustments from previously active hedge relationships.

Fair Value and Cash Flow Hedges

• We recognized a modest net loss due to net ineffectiveness on our fair value hedge accounting relationships during 2012. The loss resulted from the difference in interest rate sensitivities between the interest rate derivatives used as hedging instruments and the underlying hedged assets or liabilities. We also recognized small gains related to hedge ineffectiveness on our discount note cash flow hedge accounting relationships in 2012.

52

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Economic Hedges

• Economic hedges are hedges that do not qualify for hedge accounting treatment. Historically, we have used a combination of interest rate derivatives and callable consolidated obligation bonds to economically hedge the duration, convexity, and volatility risks associated with a portion of our MPF Loan portfolio. During 2012, interest rates rose slightly, which contributed to a small overall net loss on economic MPF Loan hedges for the period. During the third quarter of 2011, interest rates decreased significantly which contributed to a net gain of $73 million on economic MPF Loan hedges for the quarter and $21 million for the nine months ended September 30, 2011. As long as the MPF portfolio remains a relatively large component of the overall balance sheet, we anticipate fluctuations in hedge gains and losses from period to period. These losses were offset by gains on economic hedges of our consolidated obligation bonds and discount notes, which benefited from the slight rise in interest rates and accordingly, we recognized nominal gains from that strategy.

Trading Securities

• We use trading securities as part of our overall balance sheet hedging strategy to hedge other assets or liabilities. These trading securities were acquired at a premium. As these trading securities are expected to continue to approach par value over time, the related premiums are expected to continue to be recognized as losses as part of the change in fair value until maturity or sale of the securities.

Instruments Held Under Fair Value Option

• We elected the fair value option for a portion of our advances, and consolidated obligations (bonds and discount notes) to economically hedge the interest rate risk associated with these instruments. Although there was no impact on advances, we had net losses on consolidated obligation bonds in the third quarter, caused primarily by a drop in interest rates on longer termed bonds.

Extinguishment of Debt

Though we did not incur any gains or losses on debt extinguishment during 2012, we incurred losses of $21 million on debt extinguishment in the third quarter of 2011. Our objective in regards to these extinguishments was to strengthen future net interest income by reducing a portion of our existing high cost debt. The extinguishments are funded with the excess cash received from certain interest earning assets that had matured or prepaid, and that are not expected to be replaced.

MPF Xtra and other MPF administration fees

This line item represents fees earned from administering mortgage loans not reported on our statements of condition. It includes fees we receive from other FHLBs to administer their MPF Loans, as well as fees earned on MPF Xtra loans owned by Fannie Mae and administered through our internal systems. There are now five FHLBs out of 12 participating in the MPF Xtra product as of September 30, 2012, and we are looking to add more as MPF Xtra continues to grow. We have processed $4.5 billion of MPF Xtra loans for the year to date period ended September 30, 2012, compared to $1.5 billion for the same period in 2011, and $14.2 billion since inception of MPF Xtra in September 2008.

Due to the deferred nature of the recognition of fees, recorded income is up slightly over prior periods. We defer MPF Xtra fees and then recognize them over the contractual life of the loans. As of September 30, 2012, we had deferred MPF Xtra fees of $22 million compared to $16 million at December 31, 2011. Total MPF Xtra loans outstanding as of September 30, 2012 were $9.9 billion compared to $7.2 billion at December 31, 2011. MPF Xtra loans are not held on our statements of condition.

We continue to see new growth of mortgage lenders participating in MPF Xtra. A total of 521 PFIs have now been approved and executed MPF Xtra master commitments as of September 30, 2012, compared to 443 PFIs as of December 31, 2011, of which 363 PFIs have funded and delivered MPF Xtra loans compared to 321 PFIs, as of those dates.

PLMBS Dispute Settlement

In July of 2011, we reached a settlement in connection with a dispute related to certain of our private-label MBS. The settlement was reached with a third party that is not a current defendant in the private label MBS litigation we filed in October, 2010. We received and recognized into other income the total settlement amount of $14.5 million in the third quarter of 2011.

53

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Non-Interest Expense

	Three months				Nine Months
For the periods ended September 30,	2012		2011		2012		2011
Compensation and benefits	$	14	$	18	$	45	$	47
Other operating expenses	9		8		25		25
FHFA	2		2		6		8
Office of Finance	—		1		2		3
Other
MPF administration expense	1		2		4		5
Real estate owned (REO) losses and expenses, net	1		1		7		9
Other	1		4		1		4
Total non-interest expense	$	28	$	36	$	90	$	101

Compensation and benefits decreased in the third quarter primarily due to reduced pension costs. Pension cost is a function of, among other things, the interest rate used to discount future pension obligations to a present value. The Moving Ahead for Progress in the 21st Century Act (MAP-21), which was enacted in July 2012, contains provisions that stabilize the interest rates used to calculate required pension contributions. Current historically low interest rates have resulted in significant increases to required pension contributions. The pension provisions of MAP-21 Act are expected to reduce our required pension contributions for 2012 and 2013 and increase our plan's funded status.

We experienced a significant increase in REO expense in the second quarter of 2012 but returned to more historically normal rates of losses expected in the third quarter. In a distressed market for REO sales, volatility in REO expense may continue for the near future.

Assessments

	Three months				Nine months
For the period ending September 30,	2012		2011		2012		2011
Affordable Housing Program	$	10	$	15	$	31	$	22
Resolution Funding Corporation	—		—		—		17
Total assessments	$	10	$	15	$	31	$	39

Effective with our expense recorded in the second quarter of 2011, we satisfied the outstanding obligation to the Resolution Funding Corporation (REFCORP) as discussed on page 51 of our 2011 Form 10-K. We now allocate a portion of our earnings historically paid to satisfy our REFCORP obligation to a separate restricted retained earnings account starting with the third quarter of 2011. See Joint Capital Enhancement Agreement with the Other FHLBs on page 64 in our 2011 Form 10-K for further details.

We continue to fund the Affordable Housing Program (AHP) program at a calculated rate of 10% percent of income before assessments. Since the 10% AHP rate was previously calculated after the assessment for REFCORP which is no longer being assessed, the effective rate assessed to AHP will be slightly higher going forward. See Note 13 - Affordable Housing Program (AHP) to the financial statements in our 2011 Form 10-K.

Other Comprehensive Income

For the nine months ended September 30, 2012, total other comprehensive income has increased by $468 million. This increase is primarily due to the ongoing trend of significant unrealized gains on our available-for-sale securities that began in 2011 and has continued in 2012. These increases in unrealized gains resulted from a market rally and tightening of MBS spreads. These gains only would be realized if we sold the securities. If we hold the securities to maturity, these unrealized gains would ultimately reverse to zero at maturity.

Unrealized losses from primarily cash flow hedges on our discount notes continued in 2012, but were significantly less than 2011 as short term rates have stabilized in 2012 compared to the decline in interest rates during 2011.

54

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Statements of Condition

	September 30, 2012		December 31, 2011
Cash and due from banks	$	25	$	1,002
Federal Funds sold and securities purchased under agreement to resell	4,997		1,775
Investment securities	36,304		38,728
Advances	13,531		15,291
MPF Loans held in portfolio, net	11,266		14,118
Other	321		341
Total assets	$	66,444	$	71,255
Consolidated obligation discount notes	$	27,231	$	25,404
Consolidated obligation bonds	33,366		39,880
Subordinated notes	1,000		1,000
Other	1,515		1,679
Total liabilities	63,112		67,963
Capital stock	1,702		2,402
Total retained earnings	1,593		1,321
Accumulated other comprehensive income (loss)	37		(431		)
Total capital	3,332		3,292
Total liabilities and capital	$	66,444	$	71,255

Cash and due from banks, Federal Funds sold, and securities purchased under agreements to resell

Amounts held in cash and due from banks, Federal Funds sold and securities purchased under agreements to resell will vary each day based on the following:

• Interest rate spreads between Federal Funds sold and securities purchased under agreements to resell and our debt;

• Liquidity requirements;

• Counterparties available; and

• Collateral availability on securities purchased under agreements to resell.

Overnight rates for Federal Funds sold and securities purchased under agreements to resell have remained low. In addition, the European sovereign debt crisis has caused us to reduce our exposure to certain counterparties, see Short-Term Investments Unsecured Credit Exposureon page 67 for further details.

Investment Securities

Investment securities declined as securities matured or paid down and the proceeds were primarily used to pay down our consolidated obligations and to redeem a portion of our excess capital stock.

The largest portion of our investment securities portfolio was acquired to create an income bridge to transition our primary business to advances. In connection with the approval of our Capital Plan, the FHFA now requires, and our Board has passed, a resolution requiring us to obtain FHFA approval for any new investmentsthat have a term to maturity in excess of 270 days until such time as our MBS portfolio is less than three times our total regulatory capital and our advances represent more than 50% of our total assets. For further discussion of how this may impact us, see Risk Factors on page 24 in our 2011 Form 10-K. We expect our investment portfolio to continue to decline over time as a result of this limitation and as we continue to make repurchases and redemptions of excess capital stock.

55

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Advances

Advances declined as two of our five largest members as of June 30, 2012 each paid down approximately $800 million in outstanding advances during the third quarter. Members continue to report to us that they are highly liquid with deposits thus reducing demand for advances. We continue to see inter-quarter fluctuations of advances outstanding over the past year, as well as some growth and/or interest in taking new advances in specific sectors.

The following table sets forth the current period par amount of advances outstanding for the five largest advance borrowers:

	As of September 30, 2012
BMO Harris Bank National Association	$	2,375	18	%
State Farm Bank, F.S.B	1,700		13	%
Associated Bank, National Association	1,100		8	%
Cole Taylor Bank	810		6	%
Bankers Life and Casualty Company	750		6	%
All other borrowers	6,583		49	%
Total par value	$	13,318	100	%

MPF Loans Held in Portfolio, net

MPF Loans outstanding continue to decrease as a result of our ongoing strategy to not add MPF Loans to our balance sheet, except for loans being acquired under our affordable housing programs. Thus, the rate of decline in our MPF Loan balance is dependent upon the speed at which borrowers prepay their mortgages.

The speed of prepayments on a percentage basis has slowed compared to long term historical measures. Though mortgage rates have remained historically low, borrowers are not moving or refinancing at the same rates as before the financial crisis. Should market mortgage rates rise in future periods, we could expect prepayment rates to decline further. Should rates fall further, additional prepayments may occur. If an MPF Loan prepays, any remaining closed basis adjustment related to that loan is immediately recognized. This may cause volatility in interest income as mortgage prepayment activity fluctuates as interest rates rise or fall. We cannot predict the extent to which future mortgage rates will rise or fall, or the extent of prepayment activity that will accompany the mortgage rate movement.

The following table summarizes information related to our net premium and hedge accounting basis adjustments on MPF Loans.

For the three months ended	September 30, 2012			September 30, 2011
Net premium amortization	$	4		$	4
Net amortization of closed basis adjustments	12			12
For the nine months ended
Net premium amortization	$	11		$	15
Net amortization of closed basis adjustments	34			37
As of	September 30, 2012			December 31, 2011
Net premium balance on MPF Loans	$	40		$	50
Cumulative basis adjustments on MPF Loans a	—			40
Cumulative basis adjustments closed portion	107			105
MPF Loans, unpaid principal balance	11,162			13,965
Premium balance as a percent of MPF Loans	0.36		%	0.36		%

^a  Includes hedge accounting adjustments in hedge relationships that are still outstanding and loan commitment basis adjustments.

In addition to MPF Loans we hold in portfolio, we also buy, and concurrently resell to Fannie Mae, MPF Xtra loans on behalf of our PFIs and the PFIs of other MPF Banks. Our activity in this area is growing. For more details see MPF Xtra and other MPF administration fees on page 53.

56

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Liquidity, Funding, & Capital Resources

Liquidity

For the period ending September 30, 2012, we have maintained a liquidity position in accordance with FHFA regulations and guidance, and policies established by our Board of Directors. Based upon our excess liquidity position described below, we anticipate remaining in compliance with our liquidity requirements. See Liquidity, Funding, & Capital Resources on page 55 in our 2011 Form 10-K for a detailed description of our liquidity requirements.

We use different measures of liquidity as follows:

Overnight Liquidity – Our policy requires us to maintain overnight liquid assets at least equal to 3.5% of total assets. As of September 30, 2012, our overnight liquidity was $6.6 billion or 10% of assets, giving us an excess overnight liquidity of $4.3 billion.

Deposit Coverage – To support our member deposits, FHFA regulations require us to have an amount equal to the current deposits invested in obligations of the United States government, deposits in eligible banks or trust companies, or advances with maturities not exceeding five years. As of September 30, 2012, we had excess liquidity of $15.1 billion to support member deposits.

Contingency Liquidity – The cumulative five business day liquidity measurement assumes there is a localized credit crisis for all FHLBs where the FHLBs do not have the ability to issue new consolidated obligations or borrow unsecured funds from other sources (e.g., purchasing Federal Funds or customer deposits). Our net liquidity in excess of our total uses and reserves over a cumulative five-business-day period was $21.3 billion as of September 30, 2012.

In addition to the liquidity measures discussed above, the FHFA requires all 12 FHLBs to maintain liquidity through short-term investments in an amount at least equal to anticipated cash outflows under two different scenarios. We are maintaining increased balances in short-term investments to comply with this requirement. We may fund overnight or shorter term investments and advances with discount notes that have maturities that extend beyond the maturities of the related investments or advances. For a discussion of how this may impact our earnings, see page 30 in the Risk Factors section of our 2011 Form 10-K.

In September 2012, the Office of Finance revised its methodology for the allocation of the proceeds from the issuance of consolidated obligations that cannot be issued in sufficient amounts to satisfy all FHLB demand for funding during periods of financial distress and when its existing allocation processes are deemed insufficient.  In general, this methodology provides that the proceeds in such circumstances will be allocated among the FHLBs based on regulatory capital unless the Office of Finance determines that there is an overwhelming reason to adopt a different allocation method.    As is the case during any instance of a disruption in our ability to access the capital market, market conditions or this allocation could adversely impact our ability to finance our operations, which could thereby adversely impact our financial condition and results of operations.

Funding

Cash flows from operating activities

Our operating assets and liabilities support our mission to provide our member shareholders competitively priced funding, a reasonable return on their investment in our capital stock, and support for community investment activities.  Operating assets and liabilities can vary significantly in the normal course of business due to the amount and timing of cash flows, which are affected by member-driven activities and market conditions. We believe cash flows from operations, available cash balances and our ability to generate cash through short- and long-term borrowings are sufficient to fund our operating liquidity needs.  For the nine months ended September 30, 2012, net cash provided (used) by operating activities was $230 million. This resulted from net income adjusted for non-cash adjustments, primarily gains due to the change in net fair value adjustments on derivatives and hedging activities.

Cash flows from investing activities

Our investing activities predominantly include advances, MPF Loans held for investment, investment securities, and other short-term interest-earning assets. For the nine months ended September 30, 2012, net cash provided (used) by investing activities was $4.6 billion. This resulted primarily from principal collected on MPF Loans, and proceeds from the maturities and paydowns of investment securities. 

57

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Cash flows from financing activities

Our financing activities primarily reflect cash flows related to issuing and repaying consolidated obligations. For the nine months ended September 30, 2012, net cash provided (used) in our financing activities was $(5.8) billion. This was primarily driven by net pay downs of our consolidated obligation bonds, the repurchase/redemption of our excess capital stock, and maturities of our securities sold under agreements to repurchase.

Consolidated Obligation Bonds and Discount Notes

We fund our assets principally with consolidated obligations (bonds and discount notes) issued through the Office of Finance, and capital stock. Consolidated obligations have GSE status although they are not obligations of the United States and the United States does not guarantee them.

To the extent possible, reliance on short-term debt offers us advantages that are weighed against the increased risk of using short-term debt.  Traditionally, we have benefited from interest rates below LIBOR rates for our short-term debt which has resulted in a positive impact on net interest income when used to fund LIBOR-indexed assets.  However, due to the short maturity of the debt, our balance sheet may be exposed to future access to the debt markets and to refinancing risks. 

The following shows our net cash flow issuances (redemptions) by type of consolidated obligation:

For the nine months ended September 30,	2012			2011
Discount notes	$	1,825		$	1,417
Bonds	(6,550		)	(12,326		)
Total consolidated obligations	$	(4,725	)	$	(10,909	)

The following table summarizes par values of the consolidated obligations of the FHLBs and those for which we are the primary obligor:

	September 30, 2012									December 31, 2011
	Bonds			Discount Notes			Total			Bonds			Discount Notes			Total
FHLB System (par)	$	457,209		$	217,278		$	674,487		$	501,693		$	190,175		$	691,868
FHLB Chicago as primary obligor (par)	33,422			27,235			60,657			39,964			25,411			65,375
As a percent of the FHLB System	7		%	13		%	9		%	8		%	13		%	9		%

Conditions in Financial Markets

Third quarter 2012 was characterized by central bank monetary policy action intended to help assuage concerns about the global economic environment. The Federal Reserve announced late in the second quarter that the Federal Reserve's maturity extension program (referred to by some as "Operation Twist") would be extended through year-end. The European Central Bank announced plans to stop paying interest on overnight deposits and then, later in the quarter, announced plans to support peripheral countries through outright bond purchases.

In September, the Federal Open Market Committee (FOMC) announced Quantitative Easing 3 in the form of an open-ended program to purchase $40 billion in agency MBS per month to run concurrently with the previously announced reinvestment of maturing MBS principal and Operation Twist. The FOMC also extended its guidance stating that the Federal Funds rate will remain near current levels until “at least mid-2015” from “late-2014.”

During the third quarter of 2012, FHLB System-wide consolidated obligation bonds outstanding fell $31 billion to $457 billion, while consolidated obligation discount notes outstanding increased $21 billion to $217 billion. Year-to-date through the end of third quarter 2012, total consolidated obligations outstanding are down almost $18 billion with a $45 billion decrease in consolidated obligation bonds, which was partially offset by a $27 billion increase in consolidated obligation discount notes.

58

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Concerns about U.S. fiscal policy

Concerns continue about U.S. fiscal policy, including uncertainty about the so called “fiscal cliff,” which refers to certain tax increases and automatic spending cuts scheduled to become effective at the end of 2012.  A number of prominent economists have warned that the U.S. economy may fall back into recession if the Administration and Congress fail to address these issues by year end, and Moody's has warned that it may downgrade the U.S. Government credit rating if the federal debt is not stabilized.  For further discussion of how economic recession and changes in credit ratings may impact our business and funding costs, see our Risk Factors on page 24 in our 2011 10-K.

Capital Resources

Capital Rules and Minimum Capital Requirements

For a description of our current capital rules and minimum capital requirements, see Note 13 – Capital Stock and Mandatorily Redeemable Capital Stock (MRCS) to the financial statements. As of the date of this filing, we have managed our capital base and assets to remain in compliance with our minimum capital requirements.

Capital Amounts

The following table presents our five largest holdings of regulatory capital stock and reconciles our capital stock reported for regulatory purposes to the amount of capital reported in our statements of condition. MRCS is included in the calculation of the regulatory capital and leverage ratios but is recorded as a liability in the statements of condition.

As of September 30, 2012	Capital Stock					MRCS
BMO Harris Bank National Association	$	236	14		%	$	—
The Northern Trust Company	135		8		%	—
Associated Bank, National Association	96		6		%	—
State Farm Bank, F.S.B	85		5		%	—
Cole Taylor Bank	41		2		%	—
All other members	1,109		65		%	10
Total	$	1,702	100		%	$	10
	September 30, 2012		December 31, 2011
Capital stock	$	1,702	$	2,402
Total retained earnings	1,593		1,321
Accumulated other comprehensive income (loss)	37		(431		)
Total GAAP capital	$	3,332	$	3,292
Capital Stock	$	1,702	$	2,402
MRCS	10		4
Designated Amount of subordinated notes a	—		800
Total retained earnings	1,593		1,321
Regulatory capital	$	3,305	$	4,527
Excess capital stock	$	301	$	1,064

.

^a  See Note 11 - Subordinated Notes to the financial statements.

Components of total GAAP capital changed for the following reasons:

• Capital stock decreased primarily due to repurchases or redemptions of excess member capital stock as further discussed in Note 13 - Capital Stock and Mandatorily Redeemable Capital Stock (MRCS).

• Total retained earnings increased due to our net income of $275 million less dividends paid of $3 million.

• Our unrealized loss in AOCI decreased due to several factors. For details see Other Comprehensive Income on page 54.

59

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Credit deterioration may continue to negatively impact our private-label MBS portfolio.  We believe that future impairments of this portfolio are possible if unemployment rates, default, delinquency, or loss rates on mortgages continue to increase, or there is a further decline in residential real estate value. We cannot predict if or when such impairments will occur, or the impact such impairments may have on our retained earnings and capital position. See page 33 of the Risk Factors section of our 2011 Form 10-K.

We may not pay dividends if we fail to satisfy our minimum capital and liquidity requirements under the FHLB Act and FHFA regulations. Our Board of Directors has adopted a resolution that may not be amended without FHFA consent which requires that, in addition to declaring and paying dividends according to our Retained Earnings and Dividends Policy, dividends in any given quarter must not exceed the average of three-month LIBOR for that quarter on an annualized basis. The Board's resolution also requires that payment of any dividend not result in our retained earnings falling below the level of retained earnings at the previous year-end. See Note 12 - Regulatory Actions to the financial statements in this Form 10-Qand Retained Earnings and Dividend Policy on page 63 in our 2011 Form 10-K.

On October 23, 2012, our Board declared a cash dividend at an annualized rate of 0.35% per share based on our preliminary financial results for the third quarter of 2012. Although we continue to work to build our financial strength to support a reasonable dividend, any future dividend determination by our Board will depend on future operating results and be reviewed in accordance with the Board's resolution and our Retained Earnings and Dividend Policy.

We continue to allocate 20% of our net income each quarter to a restricted retained earnings account in accordance with the Joint Capital Enhancement Agreement that we entered into with the other FHLBs, as further discussed in Joint Capital Enhancement Agreement on page F-57 in our 2011 Form 10-K.

60

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Critical Accounting Policies and Estimates

The following table identifies our critical accounting policies and estimates and the page number where a detailed description of each can be found in our 2011 Form 10-K. 

Other-Than-Temporary Impairment (OTTI)	Page 67
Significant Inputs Used on all residential private-label MBS securities	Page 67
Fair Values – Sensitivity Analysis	Page 68
Estimating Fair Value	Page 68
Controls over Valuation Methodologies	Page 68
Controls over Third Party Pricing Services	Page 69
Fair Value Measurement Effect on Liquidity and Capital	Page 69
Allowance for Credit Losses - Conventional MPF Loan Assumptions	Page 70

Significant changes in our critical accounting policies and estimates from our 2011 Form 10-K are outlined below. Also see

Note 2 - Summary of Significant Accounting Policies and Note 3 – Recently Issued but Not Yet Adopted Accounting Standards to the financial statements for the impact of recently issued accounting standards on our financial results.

Other-Than-Temporary Impairment (OTTI)

We complete our OTTI analysis for our private-label MBS using key modeling assumptions, significant inputs and methodologies provided by the OTTI Committee. For a detailed discussion of how we determine our base case OTTI as well as a discussion of our accounting for fair value non-credit write-downs and credit loss only write-downs, see Note 5 - Investment Securities to the financial statements.

In addition to evaluating our private-label MBS under a base case, most probable, scenario, we performed a cash flow analysis for each of these securities under an adverse, more stressful, housing price scenario.

Under this scenario, current-to-trough home price declines were projected to range from 5.0% to 9.0% over the 3- to 9-month period beginning July 1, 2012. For most of the housing markets, the declines were projected to occur over the 3-month period beginning July 1, 2012. From the trough, home prices were projected to recover using one of five different recovery paths that vary by housing market.

The following table presents the projected home price recovery by future month under the adverse case scenario.

As of September 30, 2012	Recovery Range Annualized %
Months	Low	High
1-6	0.0%	1.9%
7-18	0.0%	2.0%
19-24	0.7%	2.7%
25-30	1.3%	2.7%
31-42	1.3%	3.4%
43-66	1.3%	4.0%
Thereafter	1.5%	3.8%

61

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

The following table presents what the impact to net income from credit-related OTTI charges would have been under this adverse scenario based on the classification (prime, Alt-A, or subprime) at the time of origination.  

	Actual						Adverse Scenario
As of and for the quarter ended September 30, 2012	# of Securities	Unpaid Principal Balance		Credit-Related OTTI			# of Securities	Unpaid Principal Balance		Credit- Related OTTI
Prime	2	$	103	$	—	*	16	$	1,019	$	(17	)
Alt-A	—	—		—			—	—		—
Subprime	2	15		—		*	12	164		(6		)
Total private-label MBS	4	$	118	$	—	*	28	$	1,183	$	(23	)

* Less than $1 million.

In the preceding table, we classify our private-label MBS as prime, subprime, or Alt-A based upon the nature of the majority of underlying mortgages collateralizing each security using the issuer's classification, or as published by an NRSRO, at the time of issuance of the MBS.  On October 15, 2010, we instituted litigation relating to sixty-four private label MBS bonds purchased by us in an aggregate original principal amount of approximately $4.29 billion. Our complaints assert claims for untrue or misleading statements in the sale of securities, and it is possible that the classifications of private-label MBS, as well as other statements made about the securities by the issuer, are inaccurate.

Significant Inputs Used on all residential private-label MBS securities

We perform cash flow analyses on substantially all of our private-label MBS, impaired or not, from our two independent model services.

The following table summarizes the significant inputs for all our private-label MBS except for securities for which the underlying collateral data is not readily available. These were evaluated for OTTI using alternative procedures. The classification in this table (prime, Alt-A, and subprime) is based on the model used to run the estimated cash flows for the CUSIP, which may not necessarily be the classification at the time of issuance.

As of September 30, 2012			Prepayment Rates			Default Rates			Loss Severities			Current Credit Enhancement
				Range %			Range %			Range %			Range %
	Unpaid Principal Balance		Weighted Average %	Low	High	Weighted Average %	Low	High	Weighted Average %	Low	High	Weighted Average %	Low	High
2006	$	813	8.0	6.8	9.7	35.3	20.4	44.2	41.6	29.3	45.8	1.0	—	10.4
2004 & prior	20		14.7	8.2	58.8	8.0	—	23.4	24.7	—	41.1	12.8	6.3	40.9
Total Prime	833		8.2	6.8	58.8	34.6	—	44.2	41.2	—	45.8	1.3	—	40.9
2006	694		7.0	4.8	9.4	50.8	35.8	70.9	49.6	45.2	61.6	2.0	—	8.6
2005	32		6.9	6.9	6.9	45.2	45.2	45.2	49.8	49.8	49.8	0.1	0.1	0.1
2004 & prior	2		10.8	8.3	11.3	35.2	31.0	53.0	29.6	22.8	42.9	26.6	19.5	71.7
Total Alt-A	728		7.0	4.8	11.3	50.5	31.0	70.9	49.5	22.8	61.6	2.0	—	71.7
2007	10		3.4	3.4	3.4	69.0	69.0	69.0	67.9	67.9	67.9	43.1	43.1	43.1
2006	890		3.2	2.0	4.4	73.0	57.9	87.5	69.3	64.2	78.7	23.6	—	73.6
2005	58		3.6	2.7	4.3	67.9	52.7	81.5	66.1	59.8	69.8	46.4	3.2	89.7
2004 & prior	16		6.7	5.8	8.4	29.3	15.4	44.5	69.0	35.1	83.4	40.5	—	100.0
Total Subprime	974		3.3	2.0	8.4	71.9	15.4	87.5	69.1	35.1	83.4	25.4	—	100.0
Total	2,535		6.0	2.0	58.8	53.5	—	87.5	54.3	—	83.4	10.8	—	100.0
Analyzed by alternative procedures	112
Total MBS	$	2,647

62

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Supplement to Affordable Housing and Community Investment Programs

As previously disclosed in Note 13 - Affordable Housing Program (AHP) in our 2011 Form 10-K, in December 2011, our Board of Directors approved a plan to supplement our current affordable housing and community investment programs with $50 million in additional funds to promote affordable housing and economic development.  Based on the underlying facts and circumstances known to us when we filed our 2011 Form 10-K, we recognized a one time charge of $50 million in the fourth quarter related to our plan to fund affordable housing and economic development projects. 

Subsequent to when we filed our 2011 Form 10-K, we began to develop a framework for the use of these funds that may be different from previously existing underlying facts and circumstances. Once a framework is approved by our Board of Directors and the FHFA, we will review our accounting treatment related to the $50 million charge recorded in 2011.  If the approved structure results in us establishing financing arrangements as opposed to non-recoverable grants, we may recognize a $50 million reversal of the previous charge in the period approval is received. We expect the $50 million in funds to be committed to affordable housing and economic development projects by the end of 2014.

63

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Risk Management - Credit Risk

We track total credit risk with our members, including advances plus risks in any of the other categories as described on page 71 in our December 31, 2011 Form 10-K. As of September 30, 2012, we had total credit risk concentrated with two members with 10% or more of our total member credit outstanding; BMO Harris Bank N.A. (parent company BMO Financial Group) at 17% and State Farm Bank, F.S.B. (parent company State Farm Mutual Automobile Insurance Company) at 12%.

Investments

The carrying values of our investment securities, Federal Funds sold, and securities purchased under agreements to resell are presented in the following table by the long term NRSRO credit rating of the counterparty.

	AAA		AA		A		BBB		BB		B		CCC		CC		C		D		Unrated		Carrying Value
As of September 30, 2012
Investment securities-
U.S, Government & other governmental related	$	—	$	5,573	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	5,573
State or local housing agency	—		25		—		—		—		—		—		—		—		—		—		25
FFELP ABS	29		7,658		—		—		—		—		—		—		—		—		—		7,687
MBS:
GSE residential	—		17,116		—		—		—		—		—		—		—		—		—		17,116
Government-guaranteed residential	—		4,327		—		—		—		—		—		—		—		—		—		4,327
Private-label MBS residential	102		17		17		8		63		34		204		298		329		501		3		1,576
Total investment securities	131		34,716		17		8		63		34		204		298		329		501		3		36,304
Federal Funds sold	—		1,682		250		—		—		—		—		—		—		—		16		1,948
Securities purchased under agreements to resell	—		1,000		1,099		950		—		—		—		—		—		—		—		3,049
Total carrying value of investments	$	131	$	37,398	$	1,366	$	958	$	63	$	34	$	204	$	298	$	329	$	501	$	19	$	41,301
As of December 31, 2011
Investment securities-
U.S. Government & other governmental related	$	—	$	6,311	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	6,311
State or local housing agency	—		27		—		—		—		—		—		—		—		—		—		27
FFELP ABS	1,340		6,819		—		—		—		—		—		—		—		—		—		8,159
MBS:
GSE residential	—		18,088		—		—		—		—		—		—		—		—		—		18,088
Government-guaranteed residential	—		4,378		—		—		—		—		—		—		—		—		—		4,378
Private-label MBS residential	136		19		9		19		96		35		286		449		522		191		3		1,765
Total investment securities	1,476		35,642		9		19		96		35		286		449		522		191		3		38,728
Federal Funds sold	—		950		—		—		—		—		—		—		—		—		—		950
Securities purchased under agreements to resell	—		200		625		—		—		—		—		—		—		—		—		825
Total carrying value of investments	$	1,476	$	36,792	$	634	$	19	$	96	$	35	$	286	$	449	$	522	$	191	$	3	$	40,503

64

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

The following three tables present the unpaid principal balance and credit ratings of our private-label residential MBS by vintage year of issuance and by Prime, Alt-A, and Subprime as designated at time of issuance. These MBS are predominantly variable rate securities.

Private-label MBS Prime	Vintage Year of Issue
As of September 30, 2012	2006			2005			2004 and Prior			Total
AAA	$	—		$	—		$	101		$	101
AA	—			—			10			10
A	—			—			4			4
BBB	—			—			4			4
Below investment grade	1,383			32			—			1,415
Unrated	—			—			5			5
Total unpaid principal balance	$	1,383		$	32		$	124		$	1,539
Amortized cost	$	1,070		$	24		$	125		$	1,219
Gross unrealized losses (incl. non-credit OTTI)	(276		)	(4		)	(1		)	(281		)
Gross unrealized gains	207			—			5			212
Fair value	$	1,001		$	20		$	129		$	1,150
Year-to-date OTTI:
Total OTTI	$	—		$	—		$	—		$	—
Net non-credit portion reclassified to (from) statements of comprehensive income	(14		)	—			—			(14		)
Net OTTI, credit portion	$	(14	)	$	—		$	—		$	(14	)
Weighted average percentage fair value to unpaid principal balance	72.3		%	62.7		%	103.8		%	74.7		%
Original weighted average credit support	11.7		%	14.2		%	3.6		%	11.1		%
Current weighted average credit support	1.6		%	0.1		%	9.7		%	2.2		%
Weighted average collateral delinquency	20.3		%	20.8		%	3.4		%	18.9		%

65

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Private-label MBS Alt-A	Vintage Year of Issue
As of September 30, 2012	2006			2004 and Prior			Total
AAA	$	—		$	—		$	—
AA	—			—			—
A	—			—			—
BBB	—			1			1
Below investment grade	124			1			125
Unrated	—			—			—
Total unpaid principal balance	$	124		$	2		$	126
Amortized cost	$	79		$	2		$	81
Gross unrealized losses (incl. non-credit OTTI)	(11		)	(1		)	(12		)
Gross unrealized gains	—			—			—
Fair value	$	68		$	1		$	69
Year-to-date OTTI:
Total OTTI	$	—		$	—		$	—
Net non-credit portion reclassified to (from) statements of comprehensive income	—			—			—
Net OTTI, credit portion	$	—		$	—		$	—
Weighted average percentage fair value to unpaid principal balance	54.7		%	25.2		%	54.8		%
Original weighted average credit support	17.9		%	7.0		%	17.8		%
Current weighted average credit support	—		%	21.9		%	0.3		%
Weighted average collateral delinquency	38.8		%	16.2		%	38.5		%

Private-label MBS Subprime	Vintage Year of Issue
As of September 30, 2012	2007			2006			2005			2004 and Prior			Total
AAA	$	—		$	—		$	—		$	—		$	—
AA	—			—			—			2			2
A	—			—			1			2			3
BBB	—			—			1			4			5
Below investment grade	10			880			44			11			945
Unrated	—			10			12			5			27
Total unpaid principal balance	$	10		$	890		$	58		$	24		$	982
Amortized cost	$	10		$	602		$	53		$	21		$	686
Gross unrealized losses (incl. non-credit OTTI)	(1		)	(118		)	(5		)	(2		)	(126		)
Gross unrealized gains	—			79			3			1			83
Fair value	$	9		$	563		$	51		$	20		$	643
Year-to-date OTTI:
Total OTTI	$	—		$	—		$	(2	)	$	—		$	(2	)
Net non-credit portion reclassified to (from) statements of comprehensive income	—			—			1			—			1
Net OTTI, credit portion	$	—		$	—		$	(1	)	$	—		$	(1	)
Weighted average percentage fair value to unpaid principal balance	92.0		%	63.2		%	87.9		%	82.7		%	65.5		%
Original weighted average credit support	23.0		%	22.9		%	22.1		%	41.8		%	23.3		%
Current weighted average credit support	43.1		%	23.6		%	46.6		%	41.4		%	25.6		%
Weighted average collateral delinquency	39.5		%	41.5		%	38.8		%	19.1		%	40.8		%

66

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Mortgage Backed Securities

The following table presents the components of amortized cost of our private-label MBS where a life-to-date OTTI credit impairment was taken at some point in time on these securities.

As of September 30, 2012	Unpaid Principal Balance	Life-To-Date OTTI Credit Impairment a	Other Adjustments b	Amortized Cost
Private-label MBS	$2,647	$742	$81	$1,986

^a  Life-to-date OTTI credit impairment excludes increases in cash flows expected to be collected that have been recognized into net income.

^b  Other Adjustments primarily consists of life-to-date accretion of interest related to the discounted present value of previously recognized credit-related impairment losses.

Short-Term Investments Unsecured Credit Exposure

We maintain a short-term investment portfolio to provide funds to meet the credit needs of our members and to maintain liquidity. See Liquidity on page 57for a discussion of our liquidity management.

Within our portfolio of short-term investments, we face credit risk from unsecured exposures to counterparties and members. Excluding investments in U.S. government and agency debt, our unsecured credit investments can have maturities that range between overnight and nine months and can consist of commercial paper, certificates of deposit, and Federal Funds sold. We are not currently entering into short-term unsecured investments beyond overnight and are transacting in Federal Funds only. We are not currently investing in term Federal Funds, commercial paper or certificates of deposit.

We actively monitor our credit exposures and the credit quality of our counterparties, including an assessment of each counterparty's financial performance, capital adequacy, sovereign support and the current market perceptions of the counterparties. General macro-economic, political and market conditions may also be considered when deciding on unsecured exposure. As a result of these monitoring activities, we may limit or suspend existing unsecured credit limits.

Under current Bank policy, eligible counterparties for short-term investments, including Federal Funds sold, are:

(i) other FHLBs;

(ii) other U.S. GSEs; and

(iii) FDIC-insured financial institutions, including U.S. subsidiaries of foreign commercial banks, or U.S. branches of foreign commercial banks whose most recently published financial statements exhibit at least $250 million of Tier 1 (or total) capital. Foreign banks must be domiciled in a country whose sovereign rating is at least Aa3 from Moody's or AA- from Standard & Poor's.

In addition, our non-member counterparties must have a rating from an NRSRO of at least Baa or BBB in order to be eligible for an unsecured credit line. Our members who are FDIC-insured financial institutions discussed in (iii) above are eligible Federal Funds counterparties, although our members do not have to meet the NRSRO ratings requirement in order to be eligible for an unsecured credit line. While from time to time we may enter into Federal Funds transactions with our members that meet the qualifications outlined above, the majority of our Federal Funds transaction tend to be with non-member counterparties. As of September 30, 2012, we had $16 million in Federal Funds outstanding to members.

FHFA regulations include limits on the amount of unsecured credit we may extend to any member or non-member counterparty or to a group of affiliated counterparties. Our Board-approved policy limits are lower than those permitted by regulation, and actual limits granted to counterparties may be lower than our internal policy limits. The FHFA limit is based on a percentage of eligible regulatory capital and the counterparty's overall credit rating. Under FHFA regulations, the level of eligible regulatory capital is determined as the lesser of our total regulatory capital or the eligible amount of regulatory capital of the counterparty. The eligible amount of regulatory capital is then multiplied by a stated percentage. The stated percentage that we may offer for term extensions of unsecured credit ranges from 1% to 15% based on a counterparty's credit rating.

FHFA regulations also permit us to extend additional unsecured credit for overnight extensions of credit and for sales of Federal Funds subject to continuing contracts that renew automatically. Our total unsecured exposure to a counterparty may not exceed twice the regulatory limit for term exposures, or a total of 2% to 30% of the eligible amount of regulatory capital, based on the counterparty's credit rating. As of September 30, 2012, we were in compliance with the regulatory limits established for our unsecured credit.

We are prohibited by FHFA regulation from investing in financial instruments issued by non-U.S. entities other than those issued by U.S. branches and agency offices of foreign commercial banks. Our unsecured credit exposures to U.S. branches and agency offices of foreign commercial banks include the risk that, as a result of political or economic conditions in a country, the counterparty may be unable to meet their contractual repayment obligations. Our unsecured credit exposures to domestic

67

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

counterparties and U.S. subsidiaries of foreign commercial banks include the risk that these counterparties have extended credit to foreign counterparties. We are in compliance with the regulation and did not own any financial instruments issued by foreign sovereign governments, including those countries that are members of the European Union, as of and for the period ended September 30, 2012.

The following table presents the credit ratings of the unsecured investment credit exposures presented by the domicile of the counterparty or the domicile of the counterparty's parent for U.S. branches and agency offices of foreign commercial banks based on the NRSRO used by us. This table does not reflect the foreign sovereign government's credit rating. We mitigate this risk by investing in unsecured investments with highly-rated counterparties and/or well-capitalized members. The unsecured investment credit exposure presented in the table may not reflect the average or maximum exposure during the period as the balances presented reflect the balances at period end.

As of September 30, 2012	AAA		AA		A		BBB		Unrated		Total
Domestic U.S.	$	—	$	232	$	—	$	—	$	16	$	248
U.S. branches and agency offices of foreign commercial banks:
Canada	—		1,300		250		—		—		1,550
Australia	—		150		—		—		—		150
Total unsecured credit exposure	$	—	$	1,682	$	250	$	—	$	16	$	1,948

We mitigate the credit risk on investments by investing in investments that have short-term maturities. All investments in the above table were of overnight duration.

Credit Products

The following table presents the number of borrowers and credit outstanding to our borrowers by rating. Our internal rating is utilized in determining our members' borrowing capacity and is not a reflection of the credit risk on the credit outstanding to an individual member. Credit outstanding consists of outstanding advances, letters of credit, MPF credit enhancement obligations, member derivative exposures, and other obligations. Collateral loan value describes the borrowing capacity assigned to the types of collateral we accept for advances. Collateral loan value does not imply fair value.

	September 30, 2012									December 31, 2011
Rating	Number of Borrowers	% of Total		Credit Outstanding		% of Total		Collateral Loan Value		Number of Borrowers	% of Total		Credit Outstanding		% of Total		Collateral Loan Value
1-3	458	86	%	$	12,657	89	%	$	34,025	460	85	%	$	13,306	83	%	$	30,469
4	33	6	%	712		5	%	1,268		40	7	%	1,280		8	%	1,731
5	42	8	%	896		6	%	1,454		45	8	%	1,388		9	%	2,225
Other		—				—				1	—	%	2		—	%	5
Total	533	100	%	$	14,265	100	%	$	36,747	546	100	%	$	15,976	100	%	$	34,430

The majority of borrowers assigned a 4 rating in the above table were required to submit specific collateral listings and the majority of borrowers assigned a 5 rating were required to deliver collateral to us or a third party custodian on our behalf. The method by which a borrower reports collateral is dependent upon the collateral status to which it is assigned, as well as the type of collateral being pledged. We assign borrowers to a borrowing base (blanket-lien) status, listing-collateral status, or delivery-collateral status. Under a blanket lien status, a borrower may report collateral pledged under a summary borrowing base. For members or a class of collateral on listing status, the member must provide us with loan-level detail of the collateral. For members or a class of collateral on delivery status, the member must deliver the collateral to us or an approved custodian for our benefit. Members must report their collateral at least quarterly. For insurance companies we took delivery of collateral for all advances outstanding regardless of credit rating at September 30, 2012, and December 31, 2011.

As a result of the collateral and other credit risk mitigation efforts, we believe we are sufficiently well collateralized on our credit outstanding and we have not recorded an allowance for credit losses on our advances or other credit products as of the periods presented, nor have we ever incurred a credit loss on advances or our other credit products to date. We have had three and seven members (or former members) placed into receivership by their regulator during the three and nine months ended September 30, 2012, and the total advances outstanding for the institutions at the time of their failure were $10 million and $72 million. All outstanding advances were either repaid or were assumed by the acquirer. No credit losses were incurred year to date on these advances.

68

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

In addition to providing advances, we also offer standby letters of credit to our members and standby bond purchase agreements with state housing authorities within our district, as disclosed in Note 16 - Commitments and Contingencies to the financial statements. To secure letter of credit risks, we require collateral as we do on advances.

MPF Loans

We record provisions for credit losses for MPF Loans due to portfolio and market trends related to rising delinquency rates, increased loss severities, and prepayment speeds consistent with the percentage increase in delinquent, nonaccrual, and impaired MPF Loans to total conventional MPF Loans. Our provision declined during the third quarter and from December 31, 2011 primarily as a result of a decline in our total outstanding delinquent MPF Loans. For details on our allowance for credit losses, please see Note 8 - Allowance for Credit Losses to the financial statements.

Derivatives

Our maximum exposure to credit loss is the fair value of derivative assets, not the notional amount, and assumes that these derivatives would completely fail to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to us. Based on credit analyses and collateral requirements, we do not anticipate any credit losses on our derivative agreements. In determining maximum credit risk, we consider accrued interest receivables and payables, and the legal right to offset derivative assets and liabilities by counterparty. Collateral with respect to derivatives with members includes collateral assigned to us, as evidenced by a written security agreement and held by the member for our benefit. During 2012, we had no exposure to futures contracts or Futures Commissions Merchants. See Note 9 - Derivatives and Hedging Activities to the financial statements for further details of our derivatives and hedging activities.

The following table summarizes our derivative counterparty credit exposure. Rating shown is the lowest rating among the three largest NRSROs. Of our net exposure after collateral, less than $1 million was with institutions outside of the U.S.

	Derivative Asset Exposure at Fair Value Net of Cash Collateral		Securities Collateral Held		Net Exposure After Collateral
As of September 30, 2012
AA	$	2	$	1	$	1
A	27		27		—
Total Counterparties	29		28		1
Member institutions	26		—		26
Total derivatives	$	55	$	28	$	27
As of December 31, 2011
AA	$	9	$	2	$	7
A	27		25		2
Total counterparties	36		27		9
Member institutions	4		—		4
Total derivatives	$	40	$	27	$	13

69

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Legislative and Regulatory Developments

The legislative and regulatory environment in which we operate continues to undergo rapid change driven principally by reforms under the Housing and Economic Reform Act of 2008, as amended (Housing Act) and the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (the Dodd-Frank Act). We expect the Housing Act and the Dodd-Frank Act, as well as plans for housing finance and GSE reform, to result in still further changes to this environment. Our business operations, funding costs, rights, obligations, and/or the environment in which we carry out our housing finance mission are likely to continue to be significantly impacted by these changes. Significant regulatory actions and developments for the period covered by this report are summarized below.

Developments under the Dodd-Frank Act Impacting Derivatives Transactions

Definitions of Certain Terms under New Derivatives Requirements. The Dodd-Frank Act will require swap dealers and certain other large users of derivatives to register as “swap dealers” or “major swap participants,” as the case may be, with the U.S. Commodity Futures Trading Commission (the CFTC) and/or the SEC. Based on the definitions in the final rules jointly issued by the CFTC and SEC in April 2012, we will not be required to register as either a major swap participant or as a swap dealer because of the derivative transactions that we enter into for the purposes of hedging and managing our interest rate risk or any derivative transactions that we may intermediate for our members.

Based on the final rules and accompanying interpretive guidance jointly issued by the CFTC and SEC in July 2012, call and put optionality in certain advances to our members will not be treated as “swaps” as long as the optionality relates solely to the interest rate on the advance and does not result in enhanced or inverse performance or other risks unrelated to the interest rate. Accordingly, our ability to offer these advances to member customers should not be affected by the new derivatives regulations.

Mandatory Clearing of Derivatives Transactions. The Dodd-Frank Act provides for new statutory and regulatory requirements for derivative transactions, including those utilized by us to hedge our interest rate and other risks. As a result of these requirements, certain derivative transactions will be required to be cleared through a third-party central clearinghouse and traded on regulated exchanges or new swap execution facilities. As further discussed in Legislative and Regulatory Developments on page 17 in our 2011 Form 10-K, cleared swaps will be subject to new requirements including mandatory reporting, record-keeping and documentation requirements established by applicable regulators and initial and variation margin requirements established by the clearinghouse and its clearing members. The CFTC recently issued guidance regarding the treatment of customer collateral for cleared swaps and proposed additional protections for such collateral.

The implementation timeframe for mandatory clearing of eligible interest rate swaps is determined according to the effective date of the CFTC's mandatory clearing determinations, which were released in proposed form on July 24, 2012 for interest rate swaps. The CFTC is expected to finalize these determinations in November 2012, and we will have to clear eligible interest rate swaps within 180 days after publication of the final determinations; we estimate that we will be required to begin clearing such eligible swaps during the second quarter 2013.

The CFTC has approved an end-user exception to mandatory clearing that would exempt derivatives transactions that we may intermediate for our members with $10 billion or less in assets; the exemption applies only if the member uses the swaps to hedge or mitigate its commercial risk and the reporting counterparty for such swaps complies with certain additional reporting requirements. As a result, any such intermediated swaps would not be subject to mandatory clearing, although such swaps would be subject to applicable new requirements for derivative transactions that are not subject to mandatory clearing requirements (uncleared trades). Although our moratorium on intermediated member swaps currently continues, we have included this discussion of intermediated member swaps because we may decide to offer intermediated member swaps in the future.

Uncleared Derivatives Transactions. The Dodd-Frank Act will also change the regulatory landscape for uncleared trades. While we expect to continue to enter into uncleared trades on a bilateral basis, such trades will be subject to new requirements, including mandatory reporting, record-keeping, documentation, and minimum margin and capital requirements established by applicable regulators. These requirements are discussed in our 2011 Form 10-K.

The CFTC recently finalized rules regarding certain new documentation requirements for uncleared trades. These rules (and the external business conduct rules for swap dealers and major swap participants that the CFTC had previously finalized) and certain additional rules that have yet to be finalized, will require amendments to the documentation for swaps we enter into with swap dealers. We have adhered to an ISDA protocol to address the new documentation requirements under the external business conduct rules and we will consider adhering to future ISDA protocols to address the recently finalized new documentation requirements for uncleared trades. The recently finalized rules require new dispute resolution and valuation provisions, new representations regarding applicable insolvency regimes and credit support modifications to our existing swap documentation. Our swap documentation with swap dealers must comply with these requirements by April 1, 2013. The recently finalized rules also impose requirements for acknowledgments and confirmations of uncleared trades between us and swap dealers. With respect to interest rate swaps that we enter into with swap dealers, these requirements will be phased in between November 13, 2012 and March 1, 2014. However, we believe that this scheduled phase-in period may be delayed until

70

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

December 31, 2012 due to a delay in swap dealer registration. This same delay in registration has also delayed the start of swap dealer compliance with certain of the external business conduct rules discussed above beyond their originally scheduled effective date of October 15, 2012. The compliance date for the remaining external business conduct rules is January 1, 2013.

The Dodd-Frank Act also imposes new margin requirements for uncleared trades, which are discussed in our 2011 Form 10-K. The CFTC, the FHFA and other bank regulators proposed margin requirements in 2011 and the CFTC has re-opened the comment period for such requirements on two occasions. The FHFA and other bank regulators recently re-opened the comment period for their proposed margin requirements until November 26, 2012. As a result, we do not expect that such requirements will be finalized until sometime in 2013 and we do not expect that they will apply to the Bank until later in 2013 at the earliest.

Recordkeeping and Reporting. Compliance dates for the new recordkeeping and reporting requirements for all of our cleared and uncleared swaps have now been established, based on the effective date for the final rule further defining the term “swap,” issued jointly by the CFTC and SEC, which became effective on October 12, 2012. We currently comply with recordkeeping requirements for our swaps that were (or are) in effect on or after July 21, 2010 and, beginning on April 10, 2013, we will have to comply with new record-keeping requirements for swaps entered into on or after April 10, 2013. For interest rate swaps that we enter into with swap dealers, the swap dealers must comply with reporting requirements applicable to such swaps, including real-time reporting requirements, as of the the date these swap dealers register as such. We will be required to comply with reporting requirements, including real-time reporting requirements for any swaps that we may intermediate for our members beginning on April 10, 2013.

We, together with the other FHLBs, will continue to monitor these rulemakings and the overall regulatory process to implement the derivatives reform under the Dodd-Frank Act. We will also continue to work with the other FHLBs to implement the processes and documentation necessary to comply with the Dodd-Frank Act's new requirements for derivatives.

Developments under the FHFA

Advance Notice of Proposed Rulemaking on Stress-Testing Requirements. On October 5, 2012, the FHFA issued a notice of proposed rulemaking that would implement a provision in the Dodd-Frank Act that requires all financial companies with assets over $10 billion to conduct annual stress tests, which will be used to evaluate an institution's capital adequacy under various economic conditions and financial conditions. The FHFA proposes to issue annual guidance to describe the baseline, adverse and severely adverse scenarios and methodologies that the FHLBs must follow in conducting their stress tests, which, as required by the Dodd-Frank Act, would be generally consistent and comparable to those established by the Federal Reserve. An FHLB would be required to provide an annual report on the results of the stress tests to the FHFA and the Federal Reserve and to then publicly disclose a summary of such report within 90 days. Comments are due by December 4, 2012.

Proposed Guidance on Collateralization of Advances and Other Credit Products Provided to Insurance Company Members. On October 5, 2012, the FHFA published a notice requesting comments on a proposed Advisory Bulletin which would set forth standards to guide the FHFA in its supervision of secured lending to insurance company members by the FHLBs.  The FHFA's notice provides that lending to insurance company members exposes FHLBs to risks that are not associated with advances to the insured depository institution members, arising from the different state's statutory and regulatory regimes and the statutory accounting principles and reporting practices. The proposed standards include consideration of, among other things:

• the level of an FHLB's exposure to insurance companies in relation to its capital structure and retained earnings;

• an FHLB's control of pledged securities collateral and ensuring it has a first-priority perfected security interest;

• the use of funding agreements between an FHLB and an insurance company member to document advances and whether such an FHLB would be recognized as a secured creditor with a first priority security interest in the collateral; and

• the FHLB's documented framework, procedures, methodologies and standards to evaluate an insurance company member's creditworthiness and financial condition, the FHLB valuation of the pledged collateral and whether an FHLB has a written plan for the liquidation of insurance company member collateral.

Comments are due by December 4, 2012.

Proposed Order on Qualified Financial Contracts (QFCs). On August 9, 2012, the FHFA circulated a proposed order on QFCs that would be applicable to the FHLBs as well as Fannie Mae and Freddie Mac (collectively, the Regulated Entities).  The FHFA has indicated that the proposed order is intended to permit the FHFA to comply with certain statutory requirements for the transfer of QFCs in the event of the receivership of a Regulated Entity.  The proposed order sets forth certain recordkeeping and reporting requirements for a Regulated Entity's QFCs.  If the order is issued as proposed, each FHLB will have to, among other things, establish and maintain infrastructure sufficient to meet the recordkeeping and reporting requirements and engage external personnel to audit its compliance with the order on an annual basis.  Comments were due by October 10, 2012.

71

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Other Significant Developments

National Credit Union Administration Proposed Rule on Access to Emergency Liquidity. On July 30, 2012, the National Credit Union Administration (NCUA) published a proposed rule requiring, among other things, that federally-insured credit unions of $100 million or larger must maintain access to at least one federal liquidity source for use in times of financial emergency and distressed circumstances. This access must be demonstrated through direct or indirect membership in the Central Liquidity Facility (a U.S. government corporation created to improve the general financial stability of credit unions by serving as a liquidity lender to credit unions) or by establishing access to the Federal Reserve's discount window. The proposed rule does not include FHLB membership as an emergency liquidity source. If the rule is issued as proposed, it may adversely impact our results of operations if it causes our federally-insured credit union members to favor these federal liquidity sources over FHLB membership or advances. Comments were due by September 28, 2012.

Housing Finance and GSE Reform. Recently, the U.S. Treasury Department (Treasury Department) announced a set of modifications to the preferred stock purchase agreements between the Treasury Department and the FHFA as conservator of Fannie Mae and Freddie Mac (together, the Enterprises) to help expedite the wind down of the Enterprises.  The changes require all future earnings from the Enterprises to be turned over to the Treasury Department and require the accelerated wind down of their retained mortgage portfolios.  By not allowing the Enterprises to retain any profits, these changes effectively ensure that the Enterprises will never be allowed to recapitalize themselves and return to the market in their previous structure.  In addition, the FHFA recently solicited comments on their proposal to create a new framework for the secondary mortgage market. The FHFA has indicated that the framework is intended to create a more efficient and flexible securitization platform for the Enterprises that also would be available to all market participants and interested parties.

As the Enterprises are being wound down, Congress and the administration have been considering various proposals to reform the U.S. housing finance system and the secondary mortgage market.  A number of bills have been introduced in Congress in the past several years, although none have proposed specific changes to the FHLBs.  No further legislative action in this area is expected until the next Congress convenes in 2013.  It is impossible to determine at this time whether or when Congress will act in this area.  The ultimate effects of housing finance and GSE reform on the FHLBs are unknown and will depend on the legislation or other changes, if any, that ultimately are implemented.

72

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

The FHFA's regulations, its Financial Management Policy, and our internal asset and liability management policies all establish guidelines for our use of interest rate derivatives. These regulations and policies prohibit the speculative use of financial instruments authorized for hedging purposes. They also limit the amount of counterparty credit risk allowed. For additional information please see Item 7A Quantitative and Qualitative Disclosures about Market Risk on page 87 in our 2011 Form 10-K.

Measurement of Market Risk Exposure

To measure our exposure, we discount the cash flows generated from modeling the terms and conditions of all interest rate-sensitive securities using current interest rates to determine their fair values or spreads to the swap curve for securities where third party prices are used. This includes considering explicit and embedded options using a lattice model or Monte Carlo simulation. We estimate yield curve, option, and basis risk exposures by calculating the fair value change in relation to various parallel changes in interest rates, implied volatility, prepayment speeds, spreads to the swap curve and mortgage rates.

The table below summarizes our sensitivity to various interest rate risk exposures in terms of changes in market value.

				Option Risk						Basis Risk
	Yield Curve Risk			Implied Volatility			Prepayment Speeds			Spread to Swap Curve			Mortgage Spread
As of September 30, 2012
Advances	$	(3	)	$	—		$	—		$	(4	)	$	—
MPF Loans	(2		)	(1		)	(7		)	(3		)	1
Mortgage Backed Securities	(10		)	(1		)	(2		)	(11		)	—
Other interest earning assets	(2		)	—			—			(5		)	—
Interest-bearing liabilities	9			6			—			8			—
Derivatives	6			(2		)	—			—			—
Total	$	(2	)	$	2		$	(9	)	n/m			$	1
As of December 31, 2011
Advances	$	(2	)	$	1		$	—		$	(4	)	$	—
MPF Loans	(2		)	(4		)	(8		)	(4		)	2
Mortgage Backed Securities	(10		)	(1		)	(2		)	(12		)	—
Other interest earning assets	(2		)	—			—			(6		)	—
Interest-bearing liabilities	11			7			—			10			—
Derivatives	5			(2		)	—			—			—
Total	$	—		$	1		$	(10	)	n/m			$	2

n/m Spread movements to the swap curve within each category are independent of the other categories and therefore a total is not meaningful.

Yield curve risk – Change in market value for a one basis point parallel increase in the swap curve.

Option risk (implied volatility) – Change in market value for a one percent parallel increase in the swaption volatility.

Option risk (prepayment speeds) – Change in market value for a one percent increase in prepayment speeds.

Basis risk (spread to swap curve) – Change in market value for a one basis point parallel increase in the spread to the swap curve.

Basis risk (mortgage spread) – Change in market value for a one basis point increase in mortgage rates.

As of September 30, 2012, our sensitivity to changes in implied volatility was $2 million. At December 31, 2011, our sensitivity to changes in implied volatility was $1 million. These sensitivities are limited in that they do not incorporate other risks, including but not limited to, non-parallel changes in yield curves, implied volatility, prepayment speeds, and basis risk related to differences between the swap and the other curves. Option positions embedded in our mortgage assets and callable debt impact our yield curve risk profile, such that swap curve changes significantly greater than one basis point cannot be linearly interpolated from the table above.

73

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Duration of equity is another measure to express interest rate sensitivity. We report the results of our duration of equity calculations to the FHFA each quarter. We measure duration of equity in a base case using the actual yield curve as of a specified date and then shock it with an instantaneous shift of the entire curve. The following table presents the duration of equity reported by us to the FHFA in accordance with the FHFA's guidance, which prescribes that down and up interest-rate shocks equal 200 basis points. However, the applicable regulation restricts the down rate from assuming a negative interest rate. Therefore, we adjust the down rate accordingly in periods of very low levels of interest rates. The results are shown in years of duration equity.

As of September 30, 2012			As of December 31, 2011
Down 200 bps	Base	Up 200 bps	Down 200 bps	Base	Up 200 bps
3.5	2.1	-2.3	2.8	2.3	1.8

Duration gap is another measure of interest rate sensitivity. Duration gap is calculated by dividing the dollar duration of equity by the fair value of assets. A positive duration gap indicates an exposure to rising interest rates. As of September 30, 2012, our duration gap was 1.2 months, compared to 1.1 months as of December 31, 2011.

As of September 30, 2012, on a U.S. GAAP basis, our fair value deficit (relative to book value) was $84 million, and our market value of equity to book value of equity ratio was 103%. At December 31, 2011, our fair value deficit was $345 million and our market value of equity to book value of equity ratio was 90%. These improvements were primarily because mortgage spreads tightened. Our market to book value of total capital for regulatory risk-based capital purposes differs from this GAAP calculation,  as discussed starting on page F-54 in our 2011 Form 10-K.

Our Asset/Liability Management Committee provides oversight of risk management practices and policies. This includes routine reporting to senior Bank management and the Board of Directors, as well as maintaining the Market Risk Policy, which defines our interest rate risk limits. The table below reflects the change in market risk limits under the Market Risk Policy.

	September 30, 2012						December 31, 2011
Scenario as of	Change in Market Value of Equity			Loss Limit			Change in Market Value of Equity			Loss Limit
-200 bp	$	129.8		$	(185.0	)	$	199.0		$	(185.0	)
-100 bp	83.7			(77.5		)	138.7			(77.5		)
-50 bp	53.2			(30.0		)	78.0			(30.0		)
-25 bp	29.9			(15.0		)	30.0			(15.0		)
+25 bp	(6.3		)	(30.0		)	(7.4		)	(30.0		)
+50 bp	0.5			(60.0		)	(4.0		)	(60.0		)
+100 bp	45.6			(155.0		)	11.2			(155.0		)
+200 bp	151.4			(370.0		)	2.6			(370.0		)

74

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Item 4. Controls and Procedures.

Disclosure Controls and Procedures

Under the supervision and with the participation of management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, as of the end of the period covered by this report (the Evaluation Date). Based on this evaluation, the principal executive officer and principal financial officer concluded as of the Evaluation Date that the disclosure controls and procedures were effective such that information relating to us that is required to be disclosed in reports filed with the SEC (i) is recorded, processed, summarized, and reported within the time periods specified in SEC rules and forms, and (ii) is accumulated and communicated to management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

For the current year quarter presented in this Form 10-Q, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Consolidated Obligations

Our disclosure controls and procedures include controls and procedures for accumulating and communicating information relating to our joint and several liability for the consolidated obligations of other FHLBs. For further information, see Item 9A. Controls and Procedures on page 94 of our 2011 Form 10-K.

75

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

PART II - OTHER INFORMATION

Item 1. Legal Proceedings.

On October 15, 2010, the Bank instituted litigation relating to 64 private label MBS bonds purchased by the Bank in an aggregate original principal amount of approximately $4.29 billion. The Bank's complaints assert claims for untrue or misleading statements in the sale of securities, signing or circulating securities documents that contained material misrepresentations, negligent misrepresentation, market manipulation, untrue or misleading statements in registration statements, controlling person liability, and rescission of contract. In these actions, the Bank seeks the remedies of rescission, recovery of damages, recovery of purchase consideration plus interest (less income received to date) and recovery of reasonable attorneys' fees and costs of suit. The litigation was brought in state court in the states of Washington, California and Illinois.

Defendants in the litigation include the following entities and affiliates thereof: American Enterprise Investment Services, Inc.; Ameriprise Financial Services, Inc.; Bank of America Corporation; Barclays Capital Inc.; Citigroup, Inc.; Countrywide Financial Corporation, Credit Suisse Securities (USA) LLC; First Horizon Asset Securities, Inc.; First Tennessee Bank, N.A.; GMAC Mortgage Group LLC, Goldman Sachs & Co., RBS Securities Inc., Sand Canyon Acceptance Corporation, N.A., J.P. Morgan Acceptance Corporation; Long Beach Securities Corp.; Merrill Lynch, Pierce Fenner & Smith Incorporated; Morgan Stanley & Co., Incorporated; Mortgage Asset Securitization Transactions, Inc.; PNC Investments LLC; Nomura Holding America Inc.; Sequoia Residential Funding, Inc.; UBS Securities LLC; WaMu Capital Corp.; and Wells Fargo Bank, N.A. One Mortgage Partners Corp., which is affiliated with J.P. Morgan Acceptance Corporation but is not a defendant in these actions, held approximately 2% of the Bank's capital stock as of September 30, 2012.  

In the Washington action, defendants filed a motion to dismiss on March 4, 2011, which was denied in its entirety on June 17, 2011. The action is proceeding in discovery. In the Illinois action, defendants filed motions to dismiss on May 27, 2011, oral argument was heard on the motions on June 5, 2012, and the court denied defendants' motions in their entirety on September 19, 2012. Sequoia Residential Funding, Inc. and its affiliates have filed with the Illinois appellate court a petition for leave to appeal the Cook County Circuit Court's denial of its motion to dismiss for lack of personal jurisdiction. This petition is currently being briefed. Certain defendants have also filed with the Circuit Court a Motion to Certify Questions of Law for Interlocutory Appeal and to Stay Discovery. This petition is also being briefed. In the California action, defendants filed demurrers asserting statutes of limitations arguments on December 1, 2011, which were denied in their entirety on June 26, 2012. On August 31, 2012, defendants in the California action filed a second round of demurrers. Briefing on these issues is anticipated to be closed by the end of November 2012, and followed by oral argument thereafter. 

The Bank may also be subject to various other legal proceedings arising in the normal course of business. After consultation with legal counsel, management is not aware of any other proceedings that might have a material effect on the Bank's financial condition or results of operations.

Item 1A. Risk Factors.

In addition to the information presented in this report, readers should carefully consider the factors set forth in the Risk Factors section on page 24 in our 2011 Form 10-K, which could materially affect our business, financial condition, or future results. These risks are not the only risks facing us. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial may also severely affect us.

76

Federal Home Loan Bank of Chicago

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

Not applicable.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosures.

Not applicable.

Item 5. Other Information.

None.

Item 6. Exhibits.

10.1	Federal Home Loan Bank of Chicago Board of Directors 2012 Compensation Policy, revised as of October 1, 2012
31.1	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 by the Principal Executive Officer
31.2	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 by the Principal Financial Officer
32.1	Certification pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 by the Principal Executive Officer
32.2	Certification pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 by the Principal Financial Officer
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

77

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Glossary of Terms

Advances: Secured loans to members.

ABS: Asset-backed-securities.

AFS: Available-for-sale securities.

AHP: Affordable Housing Program.

AOCI: Accumulated Other Comprehensive Income.

Capital Plan: The Federal Home Loan Bank of Chicago Capital Plan, effective January 1, 2012.

C&D Order: We entered into a Consent Cease and Desist Order with the Finance Board on October 10, 2007 and an amendment thereto as of July 24, 2008. On April 18, 2012, the FHFA terminated the C&D Order.

CE Amount: A PFI's assumption of credit risk on conventional MPF Loan products that are funded by, or sold to, an MPF Bank by providing credit enhancement either through a direct liability to pay credit losses up to a specified amount or through a contractual obligation to provide SMI. Does not apply to the MPF Xtra product.

CFTC: Commodity Futures Trading Commission.

Consolidated Obligations or COs: FHLB debt instruments (bonds and discount notes) which are the joint and several liability of all FHLBs; issued by the Office of Finance.

Consolidated obligation bonds: Consolidated obligations that make periodic interest payments with a term generally over one year, although we have issued for terms of less than one year.

Core Based Statistical Areas (CBSA): Refers collectively to metropolitan and micropolitan statistical areas as defined by the United States Office of Management and Budget. As currently defined, a CBSA must contain at least one urban area of 10,000 or more people.

Designated Amount: A percentage of the outstanding principal amount of the subordinated notes we were allowed to include prior to January 1, 2012, in determining compliance with our regulatory capital and minimum regulatory leverage ratio requirements and to calculate our maximum permissible holdings of mortgage-backed securities and unsecured credit.

Discount notes: Consolidated obligations with a term of one year or less, which sell at less than their face amount and are redeemed at par value when they mature.

Dodd-Frank Act: Dodd-Frank Wall Street Reform and Consumer Protection Act, enacted July 21, 2010.

Excess capital stock: Capital stock held by members in excess of their statutory requirement or minimum investment requirement, as applicable.

Excess capital stock ratio: Excess capital stock divided by regulatory capital.  

Fannie Mae: Federal National Mortgage Association.

FASB: Financial Accounting Standards Board.

FDIC: Federal Deposit Insurance Corporation.

Federal Reserve: Federal Reserve Bank of New York.

FFELP: Federal Family Education Loan Program.

FHA: Federal Housing Administration.

FHFA: Federal Housing Finance Agency - The Housing and Economic Recovery Act of 2008 enacted on July 30, 2008 created the Federal Housing Finance Agency which became the regulator of the FHLBs.

FHLB Act: The Federal Home Loan Bank Act of 1932, as amended.

78

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

FHLBs: The 12 Federal Home Loan Banks or subset thereof.

FHLB System: The 12 FHLBs and the Office of Finance.

Finance Board: The Federal Housing Finance Board. We were supervised and regulated by the Finance Board, prior to creation of the Federal Housing Finance Agency as regulator of the FHLBs by the Housing Act, effective July 30, 2008.

Freddie Mac: Federal Home Loan Mortgage Corporation.

GAAP: Generally accepted accounting principles in the United States of America.

Ginnie Mae: Government National Mortgage Association.

Government Loans: MPF Loans held in our portfolio comprised of loans insured by the Federal Housing Administration (FHA) or the Department of Housing and Urban Development (HUD) and loans guaranteed by the Department of Veteran Affairs (VA) or Department of Agriculture Rural Housing Service (RHS).

GSE: Government sponsored enterprise.

Housing Act: Housing and Economic Recovery Act of 2008, enacted July 30, 2008.

HUD: Department of Housing and Urban Development.

HTM: Held-to-maturity securities.

IFRS: International Financial Reporting Standards.

JCE Agreement: Joint Capital Enhancement Agreement entered into by all 12 FHLBs, effective February 28, 2011 and amended August 5, 2011, which is intended to enhance the capital position of each FHLB. The intent of the agreement is to allocate that portion of each FHLB's earnings historically paid to satisfy its REFCORP obligation to a separate retained earnings account at that FHLB.

LIBOR: London Interbank Offered Rate.

Master Commitment or MC: Pool of MPF Loans purchased or funded by an MPF Bank.

MBS: Mortgage-backed securities.

MPF^®: Mortgage Partnership Finance.

MPF Banks: FHLBs that participate in the MPF program.

MPF Loans: Conforming conventional and government fixed-rate mortgage loans secured by one-to-four family residential properties with maturities from five to 30 years or participations in such mortgage loans that are acquired under the MPF Program.

MPF Program: A secondary mortgage market structure that provides liquidity to FHLB members that are PFIs through the purchase or funding by an FHLB of MPF Loans.

MPF Xtra^® product: The MPF Program product under which we acquire MPF Loans from PFIs without any CE Amount and concurrently resell them to Fannie Mae.

MRCS: mandatorily redeemable capital stock.

NRSRO: Nationally Recognized Statistical Rating Organization.

Office of Finance: A joint office of the FHLBs established by the Finance Board to facilitate issuing and servicing of consolidated obligations.

OTTI: Other-than-temporary impairment.

79

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

OTTI Committee: An FHLB System OTTI Committee formed by the FHLBs to achieve consistency among the FHLBs in their analyses of the OTTI of private-label MBS.

PFI: Participating Financial Institution. A PFI is a member (or eligible housing associate) of an MPF Bank that has applied to and been accepted to do business with its MPF Bank under the MPF Program.

REFCORP: Resolution Funding Corporation.

Regulatory capital: Regulatory capital stock plus retained earnings.

Regulatory capital stock: The sum of the paid-in value of capital stock and mandatorily redeemable capital stock.

REO: Real estate owned.

Repurchase Plan: Our plan to repurchase the excess capital stock of current members over time, as approved by the FHFA on December 22, 2011. The plan terminated by its terms effective upon our most recent repurchase of excess capital stock on May 15, 2012.

RHS: Department of Agriculture Rural Housing Service.

SEC: Securities and Exchange Commission.

SMI: Supplemental mortgage insurance.

System: The Federal Home Loan Bank System consisting of the 12 Federal Home Loan Banks and the Office of Finance.

TBA: A forward contract on a mortgage-backed security (MBS), typically issued by a U.S. government sponsored entity, whereby a seller agrees to deliver a MBS for an agreed upon price on an agreed upon date.

VA: Department of Veteran's Affairs.

80

Federal Home Loan Bank of Chicago

(Dollars in millions except per share amounts unless otherwise indicated)

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		FEDERAL HOME LOAN BANK OF CHICAGO
		/s/    Matthew R. Feldman
		By:	Matthew R. Feldman
		Title:	President and Chief Executive Officer
Date:	November 9, 2012	(Principal Executive Officer)
		/s/   Roger D. Lundstrom
		By:	Roger D. Lundstrom
		Title:	Executive Vice President, Financial Information and Chief Financial Officer
Date:	November 9, 2012	(Principal Financial Officer and Principal Accounting Officer)

S-1

EX-10.1

FEDERAL HOME LOAN BANK OF CHICAGO

2012 BOARD OF DIRECTORS COMPENSATION POLICY

[Revised as of October 1, 2012]

GENERAL

Section 1261.21 of the Rules and Regulations of the Federal Housing Finance Agency requires the Board of Directors to adopt a written policy to provide for the payment of reasonable compensation to Bank Directors for the performance of their duties as members of the Board of Directors. Pursuant to that regulation, this 2012 Board of Directors' Compensation Policy ("Policy") sets forth the activities and functions for which attendance is necessary and appropriate and may be compensated, and sets forth the methodology for determining the amount of compensation to be paid. This Policy shall be reviewed annually by the Human Resources & Compensation Committee.

COMPENSATION POLICY METHODOLOGY

The goal of the Policy is to appropriately compensate the Directors for actual attendance and participation at the meetings of the Board of Directors and the committees of the Board and also for work performed on behalf of the Board of Directors and the Bank apart from such meetings.

The compensation provided in this Policy was determined after a review of comparative compensation studies by third parties with expertise in the compensation of directors (McLagan "Directors Compensation Analysis" September 2010) and the compensation paid to directors of other Federal Home Loan Banks in 2012.

PAYMENT AND FEE STRUCTURE

Members of the Board will have the following maximum annual compensation, as further calculated pursuant to this Policy.

Position	Max. Compensation	Position Duties
Chairman	$90,000	Preside at the meetings of the Board of Directors and the Executive & Governance Committee and attend other committee meetings. Represent the Bank at the Councilof FHLBs.
Vice Chairman	$80,000	Attend meetings of the Board and other committee meetings, as well as chair meetings of the Board in the Chairman's absence. Represent the Bank at the Council of FHLBs.
Audit Committee Chairman	$80,000	Attend meetings of the Board and other committee meetings, as well as chair meetings of the Audit Committee.
Committee Chairman	$75,000	Attend meetings of the Board and other committee meetings, as well as chair meetings of their respective committees.
Director	$70,000	Attend meetings of the Board and meetings of committees to which such Director is appointed.

QUARTERLY RETAINER

In order to compensate Directors for their time while serving as Directors outside of normal Committee and Board meetings, Directors shall be paid a quarterly retainer, at the end of each quarter. The retainer shall compensate Directors for their time preparing for meetings, attending Bank-sponsored member meetings and events, attending Community Investment Advisory Council meetings, attending FHLB System meetings, Board training sessions, and other activities outside of normal Committee and Board meetings. The amount of the quarterly retainer varies depending on the responsibilities of the Director as set forth below:

Chairman $11,250

Vice Chairman $10,000

Audit Committee Chairman $10,000

Committee Chairman $9,375

Director $8,750

BOARD MEETING FEES

In order to compensate Directors for their time while serving as Directors, each Director who attends a meeting of the full Board of Directors or a Committee meeting (including participating by telephone) shall be paid a Board Meeting Attendance Fee. The amount of the Board Meeting Attendance Fee varies depending on the role served at the meeting.

Board Meeting Attendance Fees shall be calculated for each director as follows:

1/2 the director's total 2012 maximum compensation (based on their role) ÷ 75% of the total attendance fee opportunities for 2012

An “attendance fee opportunity” means a day on the 2012 Board Schedule where the full Board of Directors and/or a Committee on which the director serves is scheduled to meet. On a day where more than one meeting occurs, only one Board Meeting Attendance Fee shall be paid.

No additional meeting fees will be paid to any Director for their participation in any other special meetings or events on behalf of the Board of Directors or the Bank.

EXPENSES

Each Director will be reimbursed for necessary and reasonable travel, subsistence and other related expenses incurred in connection with the performance of their official duties (including telephonic meetings or in-person meetings called at the request of the Federal Housing Finance Agency or other FHLB System body) as are payable to senior officers of the Bank under the Bank's Employee Reimbursement Policy.

The Bank will pay the transportation and other reasonable travel expenses of one guest of a director to attend a Board meeting only as specified in advance by the Bank. It is the director's responsibility to pay the transportation and other travel expenses of a guest that accompanies such director to any other Board meeting.

PERFORMANCE AND ATTENDANCE STANDARDS

The following performance criteria shall be considered in assessing a director's performance:

* Did the director attend the required number of Board and Committee meetings in the specific assessment period?

* Did the director attend most of his or her scheduled meetings in person?

* Was the director prepared for meetings?

* Did the director demonstrate knowledge of Bank policies and other relevant governance documents?

* Did the director demonstrate understanding of the FHLB System?

* Did the director actively participate in meetings?

* Did the director participate in education, training and FHLB System events during the specific assessment period?

* Did the director make decisions or suggestions that support the Bank's mission and vision?

* Did the director support Board decisions, even if he or she did not agree with the decision?

* Did the director maintain confidentiality of the discussions at meetings?

* Did the director participate in Bank-related events (i.e., FHLB System meetings, member meetings, Bank-sponsored conferences, etc.)?

* If a new director, did the director participate in all new director training and educational opportunities?

Each director shall fulfill his or her responsibilities by regularly and consistently attending meetings of the Board of Directors and any assigned committees. The Board's attendance standard shall be to attend in person or by telephone at least 75% of the total scheduled meetings of the Board and assigned committees, measured annually.

The Human Resources & Compensation Committee of the Board of Directors shall withhold the fourth quarter retainer payment to any Director who does not fulfill his or her responsibilities by failing to meet the majority of the performance criteria set forth above or by failing to attend 75% of the meetings of the Board of Directors and any assigned committees.

The Human Resources & Compensation Committee may designate a director's absence for a good cause from a scheduled meeting as an “excused absence.” An “excused absence” shall be recorded as a director in attendance for the 75% attendance standard but such director shall not be paid a meeting fee. Examples of what may be an “excused absence” include a medical condition of the director or their immediate family and an unexpected business conflict pertaining to the directors' primary business.

COMPLIANCE WITH LEGAL REQUIREMENTS

This Policy shall be incompliance with Section 7(i) of the Federal Home Loan Bank Act (12 U.S.C. §1427(i)), as amended, and any regulations issued by the Federal Housing Finance Agency, including 12 C.F.R. Part 1261.

TRANSITIONAL PROVISION

The provisions of this revised Policy shall be applied commencing as of October 1, 2012. Thus, there will be a fourth quarter retainer payment (payable in early 2013) subject to performance and attendance criteria and Meeting Attendance Fees. Any payments for the fourth quarter 2012 shall be subject to the 2012 maximum compensation amounts.

EFFECTIVE DATE

This revised 2012 Board of Directors Compensation Policy is effective as of October 1, 2012.

APPROVED BY THE BOARD

OF DIRECTORS

Dated: September 25, 2012

/s/ Peter E. Gutzmer

Its Corporate Secretary

EX-31.1

Exhibit 31.1

Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

by the Principal Executive Officer

I, Matthew R. Feldman, certify that:

1. I have reviewed this quarterly report on Form 10-Q of the Federal Home Loan Bank of Chicago;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluations; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions);

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:	November 9, 2012	By:	/s/ Matthew R. Feldman
		Name:	Matthew R. Feldman
		Title:	President and Chief Executive Officer
			(Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

by the Principal Financial Officer

I, Roger D. Lundstrom, certify that:

1.  I have reviewed this quarterly report on Form 10-Q of the Federal Home Loan Bank of Chicago;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluations; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions);

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:	November 9, 2012	By:	/s/ Roger D. Lundstrom
		Name:	Roger D. Lundstrom
		Title:	Executive Vice President, Financial
			Information & Chief Financial Officer
			(Principal Financial Officer)

EX-32.1

Exhibit 32.1

Certification Pursuant to 18 U.S.C. Section 1350,

as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

by the Principal Executive Officer

In connection with the Quarterly Report of the Federal Home Loan Bank of Chicago (the “Bank”) on Form 10-Q for the period ended September 30, 2012 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Matthew R. Feldman, President and Chief Executive Officer, certify to my knowledge, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350), that:

1.  The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.  The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Bank.

Date:	November 9, 2012	By:	/s/ Matthew R. Feldman
		Name:	Matthew R. Feldman
		Title:	President and Chief Executive Officer
			(Principal Executive Officer)

A signed original of this written statement has been provided to the Bank and will be retained by the Bank and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

Certification Pursuant to 18 U.S.C. Section 1350,

as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

by the Principal Financial Officer

In connection with the Quarterly Report of the Federal Home Loan Bank of Chicago (the “Bank”) on Form 10-Q for the period ended September 30, 2012 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Roger D. Lundstrom, Executive Vice President, Financial Information and Chief Financial Officer certify to my knowledge, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350), that:

1.  The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Bank.

Date:	November 9, 2012	By:	/s/ Roger D. Lundstrom
		Name:	Roger D. Lundstrom
		Title:	Executive Vice President, Financial Information and Chief Financial Officer
			(Principal Financial Officer)

A signed original of this written statement has been provided to the Bank and will be retained by the Bank and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Interest Income and Interest Expense Parenthetical (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Fair value hedge adjustments - Advances	$ 0	$ (43)	$ (24)	$ (50)

XML

Allowance for Credit Losses (Narratives) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Severity Rate on MPF Loan Pool and Impaired Collateral Dependent MPF Loans	38.00%	35.00%
Weighted Average Credit Loss Severity Rate	22.00%	19.30%
Real estate owned	$ 60	$ 46

XML

Investment Securities (Litigation) (Details) (October 15 2010 Litigation [Member], Private-label residential MBS [Member], USD $) In Billions, unless otherwise specified	Oct. 25, 2010 bonds
October 15 2010 Litigation [Member] | Private-label residential MBS [Member]
Loss Contingencies [Line Items]
Number of private label MBS bonds purchased by us	64
Aggregate original principal amount of private label MBS bonds purchased by us	$ 4.29

XML

Fair Value Accounting (Carrying Value and Fair Value of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	$ 55		$ 40
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	25
Federal Funds Sold	0
Securities purchased under agreements to resell	0
Trading securities	0
Available-for-sale securities	0
Held-to-maturity securities	0
Advances	0
MPF loans held in portofolio, net	0
Accrued interest receivable	0
Derivative assets	0
Deposits	0
Securities sold under agreements to repurchase	0
Accured interest payable	0
Mandatorily redeemable capital stock	10
Derivative liabilities	0
Subordinated notes	0
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0
Federal Funds Sold	1,948
Securities purchased under agreements to resell	3,049
Trading securities	2,685
Available-for-sale securities	23,760
Held-to-maturity securities	8,897
Advances	13,828
MPF loans held in portofolio, net	11,997
Accrued interest receivable	127
Derivative assets	1,272	[1]
Deposits	730
Securities sold under agreements to repurchase	0
Accured interest payable	289
Mandatorily redeemable capital stock	0
Derivative liabilities	2,949
Subordinated notes	1,137
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0
Federal Funds Sold	0
Securities purchased under agreements to resell	0
Trading securities	0
Available-for-sale securities	69
Held-to-maturity securities	1,793
Advances	0
MPF loans held in portofolio, net	208
Accrued interest receivable	0
Derivative assets	32	[1]
Deposits	0
Securities sold under agreements to repurchase	0
Accured interest payable	0
Mandatorily redeemable capital stock	0
Derivative liabilities	0
Subordinated notes	0
Netting Adjustments/Cash Collateral [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0	[2]
Federal Funds Sold	0	[2]
Securities purchased under agreements to resell	0	[2]
Trading securities	0	[2]
Available-for-sale securities	0	[2]
Held-to-maturity securities	0	[2]
Advances	0	[2]
MPF loans held in portofolio, net	0	[2]
Accrued interest receivable	0	[2]
Derivative assets	(1,249)	[2]
Deposits	0	[2]
Securities sold under agreements to repurchase	0	[2]
Accured interest payable	0	[2]
Mandatorily redeemable capital stock	0	[2]
Derivative liabilities	(2,830)	[2]
Subordinated notes	0	[2]
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	25		1,002
Federal Funds Sold	1,948		950
Securities purchased under agreements to resell	3,049		825
Trading securities	2,685		2,935
Available-for-sale securities	23,829		24,316
Held-to-maturity securities	9,790		11,477
Advances	13,531		15,291
MPF loans held in portofolio, net	11,266		14,118
Accrued interest receivable	127		153
Derivative assets	55		40
Deposits	730		648
Securities sold under agreements to repurchase	0		400
Accured interest payable	289		203
Mandatorily redeemable capital stock	10		4
Derivative liabilities	119		206
Subordinated notes	1,000		1,000
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	25		1,002
Federal Funds Sold	1,948		950
Securities purchased under agreements to resell	3,049		825
Trading securities	2,685		2,935
Available-for-sale securities	23,829		24,316
Held-to-maturity securities	10,690		12,131
Advances	13,828		15,663
MPF loans held in portofolio, net	12,205		15,177
Accrued interest receivable	127		153
Derivative assets	55		40
Deposits	730		648
Securities sold under agreements to repurchase	0		400
Accured interest payable	289		203
Mandatorily redeemable capital stock	10		4
Derivative liabilities	119		206
Subordinated notes	1,137		1,127
Discount Notes [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	0
Discount Notes [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	27,231
Discount Notes [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	0
Discount Notes [Member] | Netting Adjustments/Cash Collateral [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	0	[2]
Discount Notes [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	27,231		25,404
Discount Notes [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	27,231		25,404
Consolidated Obligation Bonds [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	0
Consolidated Obligation Bonds [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	35,222
Consolidated Obligation Bonds [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	82	[3]
Consolidated Obligation Bonds [Member] | Netting Adjustments/Cash Collateral [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	0	[2]
Consolidated Obligation Bonds [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	33,366		39,880
Consolidated Obligation Bonds [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	$ 35,304		$ 42,163

[1] Our derivative assets are, in part, secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

[2] Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

[3] Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

XML

Allowance for Credit Losses (Conventional MPF Loans) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Gross	$ 11,368			$ 11,368			$ 14,235
Total estimated losses outstanding	91			91			97
Less: losses expected to be absorbed by MPF Risk Sharing Structure	(23)			(23)			(23)
Our share of total losses	68			68			74
Less: non-credit losses	(29)	[1]		(29)	[1]		(34)	[1]
Credit losses	39			39			40
Plus: other estimated credit losses in the remaining portfolio	5			5			5
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, Beginning of Period				45
Provision for credit losses	0		3	8		12
Allowance for credit losses, End of Period	44			44
Conventional MPF [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Gross	9,133			9,133			11,674
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, Beginning of Period	48		39	45		33
Losses charged to the allowance	(4)		(1)	(9)		(4)
Provision for credit losses	0		3			12
Allowance for credit losses, End of Period	44		41	44		41
Specifically identified and individually evaluated for impairment	31			31			26
Homogeneous pools of loans and collectively evaluated for impairment	13			13			19
Individually evaluated for impairment - with an allowance	223			223			204
Collectively evaluated for impairment	8,910			8,910			11,470
Government [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Gross	$ 2,235			$ 2,235			$ 2,561

[1] Non-credit losses represent period costs on Real Estate Owned (REO), for example, real estate taxes and maintenance costs and the economic loss of interest income that was contractually due but which was not recognized in our financial statements as the impaired MPF Loans were placed on nonaccrual status.

XML

Investment Securities (Projected Home Price Recoveries) (Details)	Sep. 30, 2012
Minimum [Member]
Recovery Range Annualized % [Line Items]
Assumed current-to-trough home price declines in 3 to 9-month period	0.00%
Projected house price decline rate over 3-month period	1.00%
1 - 6 Months	0.00%
7-18 Month	0.00%
19 - 24 Months	1.00%
25-30 Months	2.00%
31-42 Months	2.00%
43-66 Months	2.00%
Thereafter	2.30%
Maximum [Member]
Recovery Range Annualized % [Line Items]
Assumed current-to-trough home price declines in 3 to 9-month period	4.00%
Projected house price decline rate over 3-month period	2.00%
1 - 6 Months	2.80%
7-18 Month	3.00%
19 - 24 Months	4.00%
25-30 Months	4.00%
31-42 Months	5.00%
43-66 Months	6.00%
Thereafter	5.60%

XML

Capital Stock and Mandatorily Redeemable Capital Stock (MRCS) (Tables)

9 Months Ended

Sep. 30, 2012

Capital [Abstract]

Schedule of Minimum Capital Requirements [Table Text Block]

The following table details our minimum capital requirements at September 30, 2012, under our new Capital Plan:

	September 30, 2012
	Required			Actual
Risk-based capital	$	1,516		$	3,305
Capital-to-assets ratio (regulatory)	4.00		%	4.97		%
Regulatory capital	$	2,658		$	3,305
Leverage capital-to-assets ratio (regulatory)	5.00		%	7.46		%
Leverage capital	$	3,322		$	4,957

Detailed components of our Risk-Based Capital were as follows:

	September 30, 2012
Credit risk	$	1,125
Market risk	41
Operations risk	350
Total risk-based capital requirement	$	1,516
Actual permanent capital	$	3,305

In addition, under the FHFA regulation on capital classifications and critical capital levels for the FHLBs, we are adequately capitalized.

At December 31, 2011, prior to conversion to our new Capital Plan, we were subject to a minimum regulatory leverage limit as further discussed in Minimum Capital Requirements prior to Conversion to New Capital Structure on page F-54 in our 2011 Form 10-K. The following table summarizes our regulatory capital requirements as a percentage of total assets at December 31, 2011, before the conversion to our new Capital Plan.

		Regulatory Capital plus Designated Amount of Subordinated Notes
		Requirement in Effect		Actual
	Non-Mortgage Assets	Ratio	Amount	Ratio	Amount
December 31, 2011	19.19%	4.76%	$3,392	6.35%	$4,527

Mandatorily Redeemable Capital Stock Rollforward [Table Text Block]

The following table shows a reconciliation of the dollar amounts in MRCS, along with the number of current and former members owning the related capital stock at period end:

September 30, 2012	Dollar Amount
MRCS at beginning of year	$	4
Capital stock reclassified to MRCS	54
Redemption of MRCS	(48		)
MRCS at end of period a	$	10
Number of stockholders holding MRCS at period end	13

^a  All MRCS outstanding at the end of the period are redeemable in five years.

XML

Fair Value Accounting (Fair Value Measured on a Nonrecurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate owned	$ 60	$ 46
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity - Private-label residential MBS	0	0
Impaired MPF Loans	0	0
Real estate owned	0	0
Total nonrecurring assets	0	0
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity - Private-label residential MBS	0	0
Impaired MPF Loans	0	0
Real estate owned	0	0
Total nonrecurring assets	0	0
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity - Private-label residential MBS	3	9
Impaired MPF Loans	208	193
Real estate owned	18	16
Total nonrecurring assets	$ 229	$ 218

XML

Allowance for Credit Losses (TDR) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Financing Receivable, Modifications [Line Items]
Maximum period of monthly payment modification			36 months
Maximum monthly payment to housing expense ratio	31.00%		31.00%
Maximum modified term of principal and interest payments			40 years
Incremental interest decrease, percent			0.125%
Floor rate			3.00%
Troubled debt restructurings that were modified during the previous 12 months that subsequently defaulted since the date of the modification			$ 8
Conventional [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment in troubled debt restructurings on our conventional MPF Loans that occurred during the reporting periods	$ 2	$ 2	$ 7	$ 5

XML

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Expire within one year	$ 4,078	$ 741
Expire after one year	894	555
Total	4,972	1,296
Unsettled consolidated obligation bonds [Member]
Loss Contingencies [Line Items]
Expire within one year	2,926	150
Expire after one year	0	0
Total	2,926	150
Member standby letters of credit [Member]
Loss Contingencies [Line Items]
Expire within one year	344	296
Expire after one year	293	273
Total	637	569
Housing authority standby bond purchase agreements [Member]
Loss Contingencies [Line Items]
Expire within one year	50	44
Expire after one year	387	282
Total	437	326
MPF Xtra mortgage purchase commitments which will be concurrently resold to Fannie Mae [Member]
Loss Contingencies [Line Items]
Expire within one year	748	250
Expire after one year	0	0
Total	748	250
MPF Loan mortgage purchase commitments for portfolio [Member]
Loss Contingencies [Line Items]
Expire within one year	3	1
Expire after one year	0	0
Total	3	1
Advance commitments [Member]
Loss Contingencies [Line Items]
Expire within one year	7	0
Expire after one year	214	0
Total	$ 221	$ 0

XML

Transactions with Members and Other FHLBs (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]
Assets - Advances	$ 13,531	$ 15,291
Liabilities - Deposits	730	648
Equity - Capital Stock	1,702	2,402
Related Party Members [Member]
Related Party Transaction [Line Items]
Assets - Advances	2,495	3,515
Liabilities - Deposits	97	69
Equity - Capital Stock	$ 250	$ 399

XML

Fair Value Accounting (Fair Value Measured on Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 55		$ 40
Level 3 Assets as a Percentage of Total Assets at Fair Value	0.40%		0.40%
Level 3 Liabilities as a Percentage of Total Liabilities at Fair Value	2.50%		0.60%
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0
Available-for-sale securities	0
Advances	0
Derivative assets	0
Derivative liabilities	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,685
Available-for-sale securities	23,760
Advances	13,828
Derivative assets	1,272	[1]
Derivative liabilities	(2,949)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0
Available-for-sale securities	69
Advances	0
Derivative assets	32	[1]
Derivative liabilities	0
Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]
Available-for-sale securities	0	[2]
Advances	0	[2]
Derivative assets	(1,249)	[2]
Derivative liabilities	2,830	[2]
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Available-for-sale securities	0		0
Advances	0		0
Derivative assets	0		0
Total assets at fair value	0		0
Derivative liabilities	0		0
Total liabilities at fair value	0		0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,685		2,935
Available-for-sale securities	23,760		24,253
Advances	9		9
Derivative assets	1,272	[3]	1,562	[3]
Total assets at fair value	27,726		28,759
Derivative liabilities	(2,949)	[3]	(2,888)	[3]
Total liabilities at fair value	6,062		16,985
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Available-for-sale securities	69		63
Advances	0		0
Derivative assets	32	[3]	37	[3]
Total assets at fair value	101		100
Derivative liabilities	0		0
Total liabilities at fair value	82		87
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]	0	[2]
Available-for-sale securities	0	[2]	0	[2]
Advances	0	[2]	0	[2]
Derivative assets	(1,249)	[2]	(1,559)	[2]
Total assets at fair value	(1,249)	[2]	(1,559)	[2]
Derivative liabilities	2,830	[2]	2,682	[2]
Total liabilities at fair value	(2,830)	[2]	(2,682)	[2]
Fair Value, Measurements, Recurring [Member] | Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,685		2,935
Available-for-sale securities	23,829		24,316
Advances	9		9
Derivative assets	55		40
Total assets at fair value	26,578		27,300
Derivative liabilities	(119)		(206)
Total liabilities at fair value	3,314		14,390
Consolidated Obligation Bonds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Obligation Bond, Fair Value	0
Consolidated Obligation Bonds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Obligation Bond, Fair Value	(35,222)
Consolidated Obligation Bonds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Obligation Bond, Fair Value	(82)	[4]
Consolidated Obligation Bonds [Member] | Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Obligation Bond, Fair Value	0	[2]
Consolidated Obligation Bonds [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Obligation Bond, Fair Value	0		0
Consolidated Obligation Bonds [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Obligation Bond, Fair Value	(855)		(2,631)
Consolidated Obligation Bonds [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Obligation Bond, Fair Value	(82)	[4]	(87)	[4]
Consolidated Obligation Bonds [Member] | Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Obligation Bond, Fair Value	0	[2]	0	[2]
Consolidated Obligation Bonds [Member] | Fair Value, Measurements, Recurring [Member] | Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Obligation Bond, Fair Value	(937)		(2,718)
U.S. Government & other government related [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Available-for-sale securities	0		0
U.S. Government & other government related [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,545		2,737
Available-for-sale securities	776		1,001
U.S. Government & other government related [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Available-for-sale securities	0		0
U.S. Government & other government related [Member] | Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]	0	[2]
Available-for-sale securities	0	[2]	0	[2]
U.S. Government & other government related [Member] | Fair Value, Measurements, Recurring [Member] | Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,545		2,737
Available-for-sale securities	776		1,001
FFELP ABS [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0
FFELP ABS [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	7,687		8,159
FFELP ABS [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0
FFELP ABS [Member] | Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	[2]	0	[2]
FFELP ABS [Member] | Fair Value, Measurements, Recurring [Member] | Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	7,687		8,159
GSE residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Available-for-sale securities	0		0
GSE residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	137		195
Available-for-sale securities	12,326		12,132
GSE residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Available-for-sale securities	0		0
GSE residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]	0	[2]
Available-for-sale securities	0	[2]	0	[2]
GSE residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	137		195
Available-for-sale securities	12,326		12,132
Government-guaranteed residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Available-for-sale securities	0		0
Government-guaranteed residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	3		3
Available-for-sale securities	2,971		2,961
Government-guaranteed residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Available-for-sale securities	0		0
Government-guaranteed residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]	0	[2]
Available-for-sale securities	0	[2]	0	[2]
Government-guaranteed residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	3		3
Available-for-sale securities	2,971		2,961
Private-label residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0
Private-label residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0
Private-label residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	69		63
Private-label residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	[2]	0	[2]
Private-label residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	69		63
Discount Notes [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	0
Discount Notes [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	(27,231)
Discount Notes [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	0
Discount Notes [Member] | Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	0	[2]
Discount Notes [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	0		0
Discount Notes [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	(2,258)		(11,466)
Discount Notes [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	0		0
Discount Notes [Member] | Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	0	[2]	0	[2]
Discount Notes [Member] | Fair Value, Measurements, Recurring [Member] | Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	$ (2,258)		$ (11,466)

[1] Our derivative assets are, in part, secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

[2] Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

[3] Our derivative assets are, in part secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

[4] Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2012

Accounting Policies [Abstract]

Use of Estimates, Policy [Policy Text Block]

Our accounting and financial reporting policies conform to generally accepted accounting principles in the United States of America (GAAP). The preparation of financial statements in conformity with GAAP requires the extensive use of management's estimates and assumptions that affect the reported amounts of assets and liabilities, as well as the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses. Actual results could differ from those estimates. Prior period amounts have been reclassified to conform to the current period presentation.

Comprehensive Income, Policy [Policy Text Block]

We adopted the new FASB guidance on the presentation of comprehensive income that was issued in June of 2011 effective January 1, 2012. Specifically, we adopted on a retrospective basis and elected to present comprehensive income in two separate consecutive statements. The new guidance did not change the items that are currently reported in our other comprehensive income or when an item of other comprehensive income must be reclassified into net income. As a result, the effect of the new guidance on our financial statements was limited to how we present our financial statements.

Consolidation, Variable Interest Entity, Policy [Policy Text Block]

Our investments in variable interest entities (VIEs) include, but are not limited to, senior interests in private label mortgage-backed securities (MBS) and Federal Family Education Loan Program (FFELP) asset-backed securities (ABS). We have evaluated these VIEs for the periods presented, and determined that we are not required to apply consolidation accounting since we are not the primary beneficiary in any of these VIEs. Excluding contractually required amounts, we have not provided financial or other support (explicitly or implicitly) during the periods presented in our financial statements. Further, we do not intend to provide such support in the future. The carrying amounts and classification of the assets that relate to these VIEs are shown in investment securities in our statements of condition. We have no liabilities related to these VIEs. Our maximum loss exposure for our VIEs is limited to the carrying value.

Loans and Leases Receivable, Troubled Debt Restructuring Policy [Policy Text Block]

Troubled Debt Restructurings

We consider a troubled debt restructuring to have occurred when we grant a concession to a borrower that we would not otherwise consider for economic or legal reasons related to the borrower's financial difficulties.  An MPF Loan involved in our troubled debt restructuring program is individually evaluated for impairment when determining its related allowance for credit losses.  Credit loss is measured by factoring in expected cash shortfalls (i.e., loss severity rate) incurred as of the reporting date as well as the economic loss attributable to delaying the original contractual principal and interest due dates.

In the event a borrower qualifies for a troubled debt restructuring under our program, we typically modify the borrower's monthly payment for a period of up to 36 months to try to achieve a target housing expense ratio of not more than 31% of their monthly qualifying income.   Any and all delinquent interest on the loan may be capitalized as long as the resulting principal balance does not exceed the original principal balance, otherwise all delinquent interest is written off.  Next, we re-amortize the new outstanding balance to reflect a principal and interest payment for a term not to exceed 40 years and attempt to achieve the target housing expense ratio. This results in a balloon payment at the original maturity date of the loan as the maturity date and number of remaining monthly payments are not adjusted.  If the target housing expense ratio is still not met, we reduce the interest rate in 0.125% increments below the original note rate, to a floor rate of 3.00% for up to 36 months, in an effort to further reduce principal and interest payments again, until the target housing expense ratio is met.

Our recorded investment in troubled debt restructurings on our conventional MPF Loans that occurred during the three and nine months ended September 30, 2012, was $2 million and $7 million, and during the three and nine months ended September 30, 2011, was $2 million and $5 million. These amounts represent both the pre- and post- modification amounts recorded in our statement of condition as of the date the troubled debt restructurings were consummated. The pre- and post- modification amounts are the same as we did not record any write-offs either due to the forgiveness of principal or a direct write-off due to a confirmed loss.

Troubled debt restructurings that were modified during the previous 12 months that subsequently defaulted during the nine months ended September 30, 2012, were $8 million. A borrower is considered to have defaulted on a troubled debt restructuring if their contractually due principal or interest payment is sixty days past due at any time during the past 12 months. In certain cases, these troubled debt restructurings may have subsequently become current.

Individually Evaluated Impaired Loans

The following table summarizes the recorded investment, unpaid principal balance, and related allowance of impaired MPF Loans individually assessed for impairment, which includes impaired collateral dependent MPF Loans and troubled debt restructurings. We had no impaired MPF Loans without an allowance for either date.

	September 30, 2012						December 31, 2011
As of	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
Impaired conventional MPF Loans with an allowance	$	223	$	221	$	31	$	204	$	202	$	26

The following table summarizes the average recorded investment of impaired MPF Loans and related interest recognized.

	September 30, 2012				September 30, 2011
For the periods ended	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Three months	$	210	$	3	$	138	$	2
Nine months	207		7		136		5

Real Estate Owned

We had $60 million and $46 million in REO, recorded in other assets, at September 30, 2012, and December 31, 2011.

Fair Value Measurement, Policy [Policy Text Block]

Fair Value Measurement and Disclosures

In May of 2011, the FASB issued amendments to achieve common fair value measurement and disclosure requirements in U.S. GAAP and International Financial Reporting Standards (IFRS). The amendments serve to clarify the FASB's intent about the application of existing fair value measurement and disclosure requirements, or change a particular principle or requirement for measuring fair value or disclosing information about fair value measurements. The amendments became effective on a prospective basis January 1, 2012. Upon adoption, we elected the “portfolio exception” for purposes of determining the nonperformance risk adjustment, if any, to the fair value of our derivative instruments. The “portfolio exception” allows for the nonperformance risk adjustment to the fair value of our derivative assets and derivative liabilities to be measured based on the net counterparty position (i.e. the price that would be received to sell a net long position or transfer a net short position for a particular credit risk exposure), rather than the individual values of financial instruments within the portfolio (i.e., the gross position). The new guidance did not have a material effect on our operating activities and financial statements at the time of adoption.

Transfers and Servicing of Financial Assets, Policy [Policy Text Block]

Reconsideration of Effective Control for Repurchase Agreements

In April of 2011, the FASB issued an amendment to existing criteria for determining whether or not a transferor has retained effective control over securities sold under agreements to repurchase.  A secured borrowing is recorded when effective control over the transferred financial assets is maintained while a sale is recorded when effective control over the transferred financial assets has not been maintained. The amendment became effective on a prospective basis for us beginning January 1, 2012.  The new guidance did not have an effect on our operating activities and financial statements at the time of adoption.

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Investment Securities (Other Than Temporary Impairment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Other than Temporary Impairment, Disclosure [Line Items]
Total OTTI	$ 0	$ (7)	$ (2)	$ (16)
Net Non-credit portion (from) to AOCI	0	(7)	(13)	(41)
OTTI Credit Portion	0	(14)	(15)	(57)
Prime [Member]
Other than Temporary Impairment, Disclosure [Line Items]
Total OTTI		0	0	0
Net Non-credit portion (from) to AOCI	0	(11)	(14)	(35)
OTTI Credit Portion		(11)	(14)	(35)
Alt-A [Member]
Other than Temporary Impairment, Disclosure [Line Items]
Total OTTI				0
Net Non-credit portion (from) to AOCI	0			(6)
OTTI Credit Portion				(6)
Subprime [Member]
Other than Temporary Impairment, Disclosure [Line Items]
Total OTTI		(7)	(2)	(16)
Net Non-credit portion (from) to AOCI	0	4	1	0
OTTI Credit Portion		$ (3)	$ (1)	$ (16)

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Investment Securities (Held-to-Maturities Securities) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	$ 10,188		$ 11,943
OTTI Recognized in AOCI (Loss)	(398)		(466)
Carrying Vallue	9,790	[1]	11,477	[1]
Gross Unrecognized Holding Gains	909		706
Gross Unrecognized Holding Losses	(9)		(52)
Fair Value	10,690		12,131
U.S. Government & Other Government Related [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	2,252		2,573
OTTI Recognized in AOCI (Loss)	0		0
Carrying Vallue	2,252		2,573
Gross Unrecognized Holding Gains	139		104
Gross Unrecognized Holding Losses	0		0
Fair Value	2,391		2,677
States and Local Housing Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	25		27
OTTI Recognized in AOCI (Loss)	0		0
Carrying Vallue	25		27
Gross Unrecognized Holding Gains	0		0
Gross Unrecognized Holding Losses	0		0
Fair Value	25		27
GSE residential MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	4,653		5,761
OTTI Recognized in AOCI (Loss)	0		0
Carrying Vallue	4,653		5,761
Gross Unrecognized Holding Gains	422		423
Gross Unrecognized Holding Losses	0		0
Fair Value	5,075		6,184
Government-guaranteed residential MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	1,353		1,414
OTTI Recognized in AOCI (Loss)	0		0
Carrying Vallue	1,353		1,414
Gross Unrecognized Holding Gains	53		34
Gross Unrecognized Holding Losses	0		0
Fair Value	1,406		1,448
Private-label residential MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	1,905		2,168
OTTI Recognized in AOCI (Loss)	(398)		(466)
Carrying Vallue	1,507		1,702
Gross Unrecognized Holding Gains	295		145
Gross Unrecognized Holding Losses	(9)		(52)
Fair Value	1,793		1,795
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	7,911		9,343
OTTI Recognized in AOCI (Loss)	(398)		(466)
Carrying Vallue	7,513		8,877
Gross Unrecognized Holding Gains	770		602
Gross Unrecognized Holding Losses	(9)		(52)
Fair Value	$ 8,274		$ 9,427

[1] Fair value of held-to-maturity securities: $10,690 and $12,131.

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Fair Value Accounting (Fair Value Difference Between Fair Value and Remaining Contractual Principal Balance Outstanding) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Fair Value, Option, Quantitative Disclosures [Line Items]
Advances, Fair Value	$ 9	$ 9
Advances [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance, Advances	9	9
Advances, Fair Value	9	9
Advances, Fair Value Over (Under) UPB	0	0
Consolidated Obligation Bonds [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Consolidated Obligation, Unpaid Principal Balance, Liabilities	(855)	(2,630)
Consolidated Obligation Bond, Fair Value	(855)	(2,631)
Fair value option adjustments	0	1
Discount Notes [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Consolidated Obligation, Unpaid Principal Balance, Liabilities	(2,258)	(11,465)
Consolidated obligation discount notes, Fair Value	(2,258)	(11,466)
Fair Value Over (Under) UPB, Discount Notes	$ 0	$ 1

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Transactions with Members and Other FHLBs (Tables)

9 Months Ended

Sep. 30, 2012

Related Party Transactions [Abstract]

Related Party Transactions, by Balance Sheet Grouping [Table Text Block]

The table below summarizes balances we had with our members as defined above as related parties (including their affiliates) as reported in the statements of condition as of the dates indicated. Members represented in these tables may change between periods presented, to the extent that our related parties change, based on changes in the composition of our Board membership.

	September 30, 2012		December 31, 2011
Assets - Advances	$	2,495	$	3,515
Liabilities - Deposits	97		69
Equity - Capital Stock	250		399

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Advances (Details) (USD $)				9 Months Ended
	Sep. 30, 2012		Dec. 31, 2011	Sep. 30, 2012 Advances [Member] BMO Harris Bank N.A. [Member]	Sep. 30, 2012 Advances [Member] State Farm Bank, F.S.B [Member]
Advances [Line Items]
Noncallable/nonputable	$ 10,357,000,000		$ 11,456,000,000
Callable	771,000,000		806,000,000
Puttable	2,190,000,000		2,828,000,000
Total par value	13,318,000,000		15,090,000,000
Advance hedging Adjustments	185,000,000		189,000,000
Other adjustments	28,000,000		12,000,000
Total advances	13,531,000,000		15,291,000,000
Due in one year or less, Amount	4,211,000,000
One to two years, Amount	1,054,000,000
Two to three years, Amount	1,016,000,000
Three to four years, Amount	1,504,000,000
Four to five years, Amount	1,280,000,000
More than five years, Amount	4,253,000,000
Due in one year or less, Weighted Average Interest Rate	0.99%
One to two years, Weighted Average Interest Rate	2.44%
Two to three years, Weighted Average Interest Rate	1.86%	[1]
Three to four years,Weighted Average Interest Rate	3.25%
Four to five years, Weighted Average Interest Rate	3.15%
More than five years, Weighted Average Interest Rate	1.45%	[1]
Total Weighted Average Interest Rate	1.78%
Next Maturity or Call Date, Due in one year or less	4,966,000,000
Next Maturity or Call Date, One to two years	960,000,000
Next Maturity or Call Date, Two to three years	966,000,000
Next Maturity or Call Date, Three to four years	1,254,000,000
Next Maturity or Call Date, Four to five years	1,080,000,000
Next Maturity or Call Date, More than five years	4,092,000,000
Next Maturity or Put Date,Due in one year or less	6,364,000,000
Next Maturity or Put Date, One to two years	1,046,000,000
Next Maturity or Put Date, Two to three years	1,009,000,000
Next Maturity or Put Date, Three to four years	741,000,000
Next Maturity or Put Date , Four to five years	847,000,000
Next Maturity or Put Date, More than five years	3,311,000,000
Advances Concentration [Abstract]
Advances outstanding				$ 2,400,000,000	$ 1,700,000,000
Percentage of total advances outstanding				18.00%	13.00%

[1] Weighted average interest rate is due to the inclusion of significant variable-rate advances.

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Capital Stock and Mandatorily Redeemable Capital Stock (MRCS) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended				9 Months Ended		0 Months Ended
	Sep. 30, 2012 stockholders		Sep. 30, 2012 stockholders		Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Capital Stock Ownership By Third Party [Member] BMO Harris Bank N.A. [Member]	Sep. 30, 2012 Common Class B [Member]	Nov. 15, 2012 Scenario, Forecast [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital Stock Par Value	$ 100		$ 100			$ 100		$ 100
Capital Stock, redemption, period of written notice			5 years
Excess capital stock repurchased (including capital stock reclassified as MRCS)	$ 148		$ 798
Excess capital	301		301			1,100
Excess capital stock repurchased			790						100
Capital stock							236
Concentration Risk, Percentage							14.00%
Regulatory Capital Requirements [Abstract]
Risk-based capital, Credit risk	1,125		1,125
Risk-based capital, Market risk	41		41
Risk-based capital, Operations risk	350		350
Risk-based capital, Required	1,516		1,516
Actual Risk-based capital	3,305		3,305
Capital-to-assets ratio (regulatory), Required	4.00%		4.00%
Capital-to-assets ratio (regulatory), Actual	4.97%		4.97%
Regulatory capital, Required	2,658		2,658
Regulatory capital, Actual	3,305		3,305
Leverage capital-to-assets ratio (regulatory), Required	5.00%		5.00%
Leverage capital-to-assets ratio (regulatory), Actual	7.46%		7.46%
Leverage capital, Required	3,322		3,322
Leverage capital, Actual	4,957		4,957
Regulatory Capital plus Designated Amount of Subordinated Notes [Abstract]
Non-Mortgage Assets Ratio						19.19%
Requirement in Effect, Ratio						4.76%
Requirement in Effect, Amount						3,392
Actual Ratio						6.35%
Actual Amount						4,527
Mandatorily Redeemable Capital Stock [Roll Forward]
MRCS at beginning of year			4
Capital stock reclassified to MRCS			54		4
Redemption of MRCS			(48)
MRCS at end of period	$ 10	[1]	$ 10	[1]
Number of stockholders holding MRCS	13		13

[1] All MRCS outstanding at the end of the period are redeemable in five years.

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Derivatives and Hedging Activities (Derivatives in Statement of Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedges - ineffectiveness net gain (loss)	$ 0	$ (14)	$ (2)	$ (15)
Cash flow hedges - ineffectiveness net gain (loss)	0	26	2	40
Economic hedges - net gain (loss)	(1)	83	2	52
Net gains (losses) on derivatives and hedging activities	(1)	95	2	77
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedges - ineffectiveness net gain (loss)	0	(16)	(3)	(10)
Economic hedges - net gain (loss)	(29)	(180)	(75)	(185)
Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedges - ineffectiveness net gain (loss)	0	2	1	(5)
Interest Rate Swaption [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Economic hedges - net gain (loss)	6	201	24	141
Interest Rate Caps or Floors [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Economic hedges - net gain (loss)	(2)	42	(11)	32
Interest Rate Futures or TBAs [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Economic hedges - net gain (loss)	0	0	0	0
Mortgage Delivery Commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Economic hedges - net gain (loss)	1	0	1	0
Net Interest Settlements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Economic hedges - net gain (loss)	$ 23	$ 20	$ 63	$ 64

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Investment Securities (Significant Inputs) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Significant Inputs for Credit Loss Measurement [Line Items]
Unpaid Principal Balance	$ 118
Prepayment Rates, Weighted Average %	7.70%
Default Rates, Weighted Average %	42.20%
Loss Severities, Weighted Average %	46.40%
Credit Enhancement, Weighted Average %	3.00%
Maximum [Member]
Significant Inputs for Credit Loss Measurement [Line Items]
Prepayment Rates, Range %	9.30%
Default Rates, Range %	87.50%
Loss Severities, Range %	78.70%
Credit Enhancement, Range %	6.30%
Minimum [Member]
Significant Inputs for Credit Loss Measurement [Line Items]
Prepayment Rates, Range %	2.00%
Default Rates, Range %	27.40%
Loss Severities, Range %	40.00%
Credit Enhancement, Range %	0.00%
Prime [Member] | 2006 [Member]
Significant Inputs for Credit Loss Measurement [Line Items]
Unpaid Principal Balance	103
Prepayment Rates, Weighted Average %	8.40%
Default Rates, Weighted Average %	36.60%
Loss Severities, Weighted Average %	42.30%
Credit Enhancement, Weighted Average %	3.20%
Prime [Member] | 2006 [Member] | Maximum [Member]
Significant Inputs for Credit Loss Measurement [Line Items]
Prepayment Rates, Range %	9.30%
Default Rates, Range %	40.60%
Loss Severities, Range %	43.30%
Credit Enhancement, Range %	6.30%
Prime [Member] | 2006 [Member] | Minimum [Member]
Significant Inputs for Credit Loss Measurement [Line Items]
Prepayment Rates, Range %	8.10%
Default Rates, Range %	27.40%
Loss Severities, Range %	40.00%
Credit Enhancement, Range %	1.90%
Subprime [Member] | 2006 [Member]
Significant Inputs for Credit Loss Measurement [Line Items]
Unpaid Principal Balance	$ 15
Prepayment Rates, Weighted Average %	2.80%
Default Rates, Weighted Average %	79.80%
Loss Severities, Weighted Average %	74.20%
Credit Enhancement, Weighted Average %	1.30%
Subprime [Member] | 2006 [Member] | Maximum [Member]
Significant Inputs for Credit Loss Measurement [Line Items]
Prepayment Rates, Range %	3.60%
Default Rates, Range %	87.50%
Loss Severities, Range %	78.70%
Credit Enhancement, Range %	2.50%
Subprime [Member] | 2006 [Member] | Minimum [Member]
Significant Inputs for Credit Loss Measurement [Line Items]
Prepayment Rates, Range %	2.00%
Default Rates, Range %	71.50%
Loss Severities, Range %	69.30%
Credit Enhancement, Range %	0.00%

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2012

Accounting Policies [Abstract]

Significant Accounting Policies [Text Block]

Summary of Significant Accounting Policies

Unless otherwise noted below, our Summary of Significant Accounting Policies can be found in our 2011 Form 10-K starting on page F-10. The following accounting policies have been revised or updated during 2012:

Changes in Accounting Policies

Fair Value Measurement and Disclosures

In May of 2011, the FASB issued amendments to achieve common fair value measurement and disclosure requirements in U.S. GAAP and International Financial Reporting Standards (IFRS). The amendments serve to clarify the FASB's intent about the application of existing fair value measurement and disclosure requirements, or change a particular principle or requirement for measuring fair value or disclosing information about fair value measurements. The amendments became effective on a prospective basis January 1, 2012. Upon adoption, we elected the “portfolio exception” for purposes of determining the nonperformance risk adjustment, if any, to the fair value of our derivative instruments. The “portfolio exception” allows for the nonperformance risk adjustment to the fair value of our derivative assets and derivative liabilities to be measured based on the net counterparty position (i.e. the price that would be received to sell a net long position or transfer a net short position for a particular credit risk exposure), rather than the individual values of financial instruments within the portfolio (i.e., the gross position). The new guidance did not have a material effect on our operating activities and financial statements at the time of adoption. Refer to Note 15 - Fair Value Accounting for the new disclosures.

Reconsideration of Effective Control for Repurchase Agreements

In April of 2011, the FASB issued an amendment to existing criteria for determining whether or not a transferor has retained effective control over securities sold under agreements to repurchase.  A secured borrowing is recorded when effective control over the transferred financial assets is maintained while a sale is recorded when effective control over the transferred financial assets has not been maintained. The amendment became effective on a prospective basis for us beginning January 1, 2012.  The new guidance did not have an effect on our operating activities and financial statements at the time of adoption.

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Derivatives and Hedging Activities (Fair Value Hedges) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	$ 0		$ (14)		$ (2)		$ (15)
Hedge Adjustments Amortized into Net Interest Income	0		43		24		50
Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	(44)		(212)		(121)		(156)
Gain (Loss) on Hedged Item	44		198		119		141
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	0		(14)		(2)		(15)
Effect of Derivatives on Net Interest Income	(21)	[1]	13	[1]	(53)	[1]	15	[1]
Hedge Adjustments Amortized into Net Interest Income	(18)	[2]	(65)	[2]	(85)	[2]	(117)	[2]
AFS Securities [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	(35)		(335)		(112)		(419)
Gain (Loss) on Hedged Item	36		323		111		405
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	1		(12)		(1)		(14)
Effect of Derivatives on Net Interest Income	(33)	[1]	(36)	[1]	(98)	[1]	(103)	[1]
Hedge Adjustments Amortized into Net Interest Income	0	[2]	0	[2]	0	[2]	0	[2]
Advances [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	(5)		(43)		(13)		(26)
Gain (Loss) on Hedged Item	6		44		20		34
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	1		1		7		8
Effect of Derivatives on Net Interest Income	(19)	[1]	(29)	[1]	(64)	[1]	(115)	[1]
Hedge Adjustments Amortized into Net Interest Income	0	[2]	(42)	[2]	(24)	[2]	(51)	[2]
MPF Loans Held For Portfolio [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	0		4		1		(2)
Gain (Loss) on Hedged Item	0		(2)		0		(4)
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	0		2		1		(6)
Effect of Derivatives on Net Interest Income	0	[1]	(1)	[1]	(2)	[1]	(6)	[1]
Hedge Adjustments Amortized into Net Interest Income	(12)	[2]	(12)	[2]	(39)	[2]	(37)	[2]
Consolidated Obligation Bonds [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	(4)		162		3		291
Gain (Loss) on Hedged Item	2		(167)		(12)		(294)
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	(2)		(5)		(9)		(3)
Effect of Derivatives on Net Interest Income	31	[1]	79	[1]	111	[1]	239	[1]
Hedge Adjustments Amortized into Net Interest Income	$ (6)	[2]	$ (11)	[2]	$ (22)	[2]	$ (29)	[2]

[1] Represents the effect of net interest settlements attributable to existing derivative hedging instruments on net interest income. The effect of derivatives on net interest income is included in the interest income/expense line item of the respective hedged item type.

[2] Amortization of hedge adjustments is included in the interest income/expense line item of the respective hedged item type.

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Investment Securities (Unrealized Temporary Losses on AFS) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 0		$ 4,427
Less than 12 Months, Gross Unrealized Losses	0		(96)
12 Months or More, Fair Value	4,926		1,346
12 Months or More, Gross Unrealized Losses	(91)		(59)
Total Fair Value	4,926		5,773
Total Gross Unrealized Losses	(91)		(155)
Gross unrealized/unrecognized recoveries in fair value	36		28
U.S. Government & Other Government Related [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0		98
Less than 12 Months, Gross Unrealized Losses	0		(2)
12 Months or More, Fair Value	49		0
12 Months or More, Gross Unrealized Losses	0		0
Total Fair Value	49		98
Total Gross Unrealized Losses	0		(2)
FFELP ABS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0		223
Less than 12 Months, Gross Unrealized Losses	0		(3)
12 Months or More, Fair Value	1,123		1,203
12 Months or More, Gross Unrealized Losses	(14)		(32)
Total Fair Value	1,123		1,426
Total Gross Unrealized Losses	(14)		(35)
GSE residential MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0		4,073
Less than 12 Months, Gross Unrealized Losses	0		(91)
12 Months or More, Fair Value	3,685		0
12 Months or More, Gross Unrealized Losses	(65)		0
Total Fair Value	3,685		4,073
Total Gross Unrealized Losses	(65)		(91)
Government-guaranteed residential MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value			33
Less than 12 Months, Gross Unrealized Losses			0
12 Months or More, Fair Value			80
12 Months or More, Gross Unrealized Losses			0
Total Fair Value			113
Total Gross Unrealized Losses			0
Private-label residential MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0		0
Less than 12 Months, Gross Unrealized Losses	0		0
12 Months or More, Fair Value	69		63
12 Months or More, Gross Unrealized Losses	(12)	[1]	(27)	[1]
Total Fair Value	69		63
Total Gross Unrealized Losses	(12)	[1]	(27)	[1]
MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0		4,106
Less than 12 Months, Gross Unrealized Losses	0		(91)
12 Months or More, Fair Value	3,754		143
12 Months or More, Gross Unrealized Losses	(77)		(27)
Total Fair Value	3,754		4,249
Total Gross Unrealized Losses	$ (77)		$ (118)

[1] Includes $36 million and $28 million of gross unrealized/unrecognized recoveries in fair value at September 30, 2012, and at December 31, 2011.

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MPF Loans (Tables)

9 Months Ended

Sep. 30, 2012

Mortgage Loans on Real Estate [Abstract]

Mortgage Loans Held for Portfolio [Table Text Block]

The following table presents information on MPF Loans held in our portfolio by contractual maturity at time of purchase. All are fixed-rate. Government is comprised of loans insured by the Federal Housing Administration (FHA) or the Department of Housing and Urban Development (HUD) and loans guaranteed by the Department of Veteran Affairs (VA) or Department of Agriculture Rural Housing Service (RHS). MPF Loans outstanding continue to decrease as a result of our ongoing strategy to not add MPF Loans to our balance sheet, except for loans being acquired under our affordable housing programs.

As of	September 30, 2012			December 31, 2011
Medium term (15 years or less)	$	2,827		$	3,810
Long term (greater than 15 years)	8,335			10,155
Total unpaid principal balance	11,162			13,965
Net premiums, credit enhancement and deferred loan fees	41			53
Hedging adjustments	107			145
Total before allowance for credit losses	11,310			14,163
Allowance for credit losses	(44		)	(45		)
Total MPF Loans held in portfolio, net	$	11,266		$	14,118
Conventional	$	8,954		$	11,433
Government	2,208			2,532
Total unpaid principal balance	$	11,162		$	13,965

See Note 8 - Allowance for Credit Lossesfor information related to our credit risk on MPF Loans and allowance for credit losses methodology.

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Advances (Tables)

9 Months Ended

Sep. 30, 2012

Advances [Abstract]

Schedule of Advances by Callable and Putable Features [Table Text Block]

The following table presents our advances by callable/putable features:

As of	September 30, 2012		December 31, 2011
Noncallable/nonputable	$	10,357	$	11,456
Callable	771		806
Putable	2,190		2,828
Total par value	13,318		15,090
Hedging adjustments	185		189
Other adjustments	28		12
Total advances	$	13,531	$	15,291

Advances by Year of Contractual Maturity, Next Call Date, or Next Put or Convert Date [Table Text Block]

The following table presents our advances by redemption terms:

As of September 30, 2012	Amount		Weighted Average Interest Rate			Next Maturity or Call Date		Next Maturity or Put Date
Due in one year or less	$	4,211	0.99	%		$	4,966	$	6,364
One to two years	1,054		2.44	%		960		1,046
Two to three years	1,016		1.86	%	a	966		1,009
Three to four years	1,504		3.25	%		1,254		741
Four to five years	1,280		3.15	%		1,080		847
More than five years	4,253		1.45	%	a	4,092		3,311
Total par value	$	13,318	1.78	%		$	13,318	$	13,318

^a  Weighted average interest rate is due to the inclusion of significant variable-rate advances.

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Allowance for Credit Losses (Credit Quality Indicators - MPF Loans) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Recorded Investment, Past Due [Line Items]
Past due 30-59 days	$ 301		$ 383
Past due 60-89 days	100		129
Past due 90 days or more	489		551
Total past due	890		1,063
Total current	10,478		13,172
Financing Receivable, Gross	11,368		14,235
In process of foreclosure	244		256
Serious delinquency rate	4.32%	[1]	3.89%	[1]
Past due 90 days or more still accruing interest	304	[2]	376	[2]
On nonaccrual status	228		211
Conventional [Member]
Recorded Investment, Past Due [Line Items]
Past due 30-59 days	178		222
Past due 60-89 days	58		74
Past due 90 days or more	265		303
Total past due	501		599
Total current	8,632		11,075
Financing Receivable, Gross	9,133		11,674
In process of foreclosure	159		193
Serious delinquency rate	2.91%	[1]	2.62%	[1]
Past due 90 days or more still accruing interest	79	[2]	128	[2]
On nonaccrual status	228		211
Government [Member]
Recorded Investment, Past Due [Line Items]
Past due 30-59 days	123		161
Past due 60-89 days	42		55
Past due 90 days or more	224		248
Total past due	389		464
Total current	1,846		2,097
Financing Receivable, Gross	2,235		2,561
In process of foreclosure	85		63
Serious delinquency rate	10.06%	[1]	9.69%	[1]
Past due 90 days or more still accruing interest	225	[2]	248	[2]
On nonaccrual status	$ 0		$ 0

[1] MPF Loans that are 90 days or more past due or in the process of foreclosure as a percentage of the total recorded investment.

[2] Consists of MPF Loans that are either government mortgage loans or conventional mortgage loans that are well secured (by collateral that have a realizable value sufficient to discharge the debt or by the guarantee or insurance, such as PMI, of a financially responsible party) and in the process of collection.

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Investment Securities (Unrealized Temporary Losses on HTM) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	$ 0	$ 7
Less than 12 Months, Gross Unrealized Losses	0	0
12 Months or More, Fair Value	1,645	1,690
12 Months or More, Gross Unrealized Losses	(407)	(518)
Total Fair Value	1,645	1,697
Total Gross Unrealized Losses	(407)	(518)
U.S. Government & Other Government Related [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value		7
Less than 12 Months, Gross Unrealized Losses		0
12 Months or More, Fair Value		0
12 Months or More, Gross Unrealized Losses		0
Total Fair Value		7
Total Gross Unrealized Losses		0
GSE residential MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value		0
Less than 12 Months, Gross Unrealized Losses		0
12 Months or More, Fair Value		37
12 Months or More, Gross Unrealized Losses		0
Total Fair Value		37
Total Gross Unrealized Losses		0
Private-label residential MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Gross Unrealized Losses	0	0
12 Months or More, Fair Value	1,645	1,653
12 Months or More, Gross Unrealized Losses	(407)	(518)
Total Fair Value	1,645	1,653
Total Gross Unrealized Losses	(407)	(518)
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Gross Unrealized Losses	0	0
12 Months or More, Fair Value	1,645	1,690
12 Months or More, Gross Unrealized Losses	(407)	(518)
Total Fair Value	1,645	1,690
Total Gross Unrealized Losses	$ (407)	$ (518)

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Allowance for Credit Losses (Tables)

9 Months Ended

Sep. 30, 2012

Allowance for Credit Losses [Abstract]

Impact of MPF Risk Sharing Structure on Allowance for Credit Losses [Table Text Block]

The table below presents the impact of the MPF Risk Sharing Structure and severity rates on our allowance for credit losses. As of September 30, 2012, our Total Severity Rate for the MPF Risk Sharing Structure was 38.0%, which included a weighted average Credit Loss Severity Rate of 22.0% attributable to the MPF Loan pool and impaired collateral dependent MPF Loans. Comparable rates at December 31, 2011, were 35.0% and 19.3%. For detailed definitions of how Total Severity Rate and Credit Loss Severity Rate are calculated, see Loss Severity on page F-38 in our 2011 Form 10-K.

As of	September 30, 2012			December 31, 2011
Total estimated losses outstanding	$	91		$	97
Less: losses expected to be absorbed by MPF Risk Sharing Structure	(23		)	(23		)
Our share of total losses	68			74
Less: non-credit losses a	(29		)	(34		)
Credit losses	39			40
Plus: other estimated credit losses in the remaining portfolio	5			5
Allowance for credit losses on conventional MPF Loans	$	44		$	45

^a  Non-credit losses represent period costs on Real Estate Owned (REO), for example, real estate taxes and maintenance costs and the economic loss of interest income that was contractually due but which was not recognized in our financial statements as the impaired MPF Loans were placed on nonaccrual status.

Rollforward of Allowance for Credit Losses on Mortgage Loans [Table Text Block]

The following table presents the changes in the allowance for credit losses on conventional MPF Loans and the recorded investment by impairment methodology.

	September 30, 2012			September 30, 2011
For the three months ended
Allowance for credit losses on conventional MPF Loans-
Balance, beginning of period	$	48		$	39
Losses charged to the allowance	(4		)	(1		)
Provision for credit losses	—			3
Balance, end of period	$	44		$	41
For the nine months ended
Allowance for credit losses on conventional MPF Loans-
Balance, beginning of period	$	45		$	33
Losses charged to the allowance	(9		)	(4		)
Provision for credit losses	8			12
Balance, end of period	$	44		$	41
As of	September 30, 2012			December 31, 2011
Allowance assigned to conventional MPF Loans-
Specifically identified and individually evaluated for impairment	$	31		$	26
Homogeneous pools of loans and collectively evaluated for impairment	13			19
Total	$	44		$	45
Recorded Investment in Conventional MPF Loans-
Individually evaluated for impairment - with an allowance	$	223		$	204
Collectively evaluated for impairment	8,910			11,470
Total	$	9,133		$	11,674

Recorded Investment in Delinquent Mortgage Loans [Table Text Block]

The table below summarizes our recorded investment in MPF Loans by our key credit quality indicators.

	September 30, 2012									December 31, 2011
As of	Conventional			Government			Total			Conventional			Government			Total
Past due 30-59 days	$	178		$	123		$	301		$	222		$	161		$	383
Past due 60-89 days	58			42			100			74			55			129
Past due 90 days or more	265			224			489			303			248			551
Total past due	501			389			890			599			464			1,063
Total current	8,632			1,846			10,478			11,075			2,097			13,172
Total recorded investment	$	9,133		$	2,235		$	11,368		$	11,674		$	2,561		$	14,235
In process of foreclosure	$	159		$	85		$	244		$	193		$	63		$	256
Serious delinquency rate a	2.91		%	10.06		%	4.32		%	2.62		%	9.69		%	3.89		%
Past due 90 days or more still accruing interest b	$	79		$	225		$	304		$	128		$	248		$	376
On nonaccrual status	$	228		$	—		$	228		$	211		$	—		$	211

^a  MPF Loans that are 90 days or more past due or in the process of foreclosure as a percentage of the total recorded investment.

^b  Consists of MPF Loans that are either government mortgage loans or conventional mortgage loans that are well secured (by collateral that have a realizable value sufficient to discharge the debt or by the guarantee or insurance, such as PMI, of a financially responsible party) and in the process of collection.

Individually Evaluated Impaired Loan Statistics by Product Class Level [Table Text Block]

Individually Evaluated Impaired Loans

The following table summarizes the recorded investment, unpaid principal balance, and related allowance of impaired MPF Loans individually assessed for impairment, which includes impaired collateral dependent MPF Loans and troubled debt restructurings. We had no impaired MPF Loans without an allowance for either date.

	September 30, 2012						December 31, 2011
As of	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
Impaired conventional MPF Loans with an allowance	$	223	$	221	$	31	$	204	$	202	$	26

Average Recorded Investment of Individually Impaired Loans and Related Interest Income Recognized [Table Text Block]

The following table summarizes the average recorded investment of impaired MPF Loans and related interest recognized.

	September 30, 2012				September 30, 2011
For the periods ended	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Three months	$	210	$	3	$	138	$	2
Nine months	207		7		136		5

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Derivatives and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2012

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Value of Derivative Instruments [Table Text Block]

The following table summarizes our derivatives, including cash collateral and related interest where we had the right to reclaim the collateral on derivative assets. We delivered no excess collateral on derivative liabilities for the periods presented.

	September 30, 2012								December 31, 2011
As of	Notional Amount		Derivative Assets			Derivative Liabilities			Notional Amount		Derivative Assets			Derivative Liabilities
Derivatives in hedge accounting relationships-
Interest rate swaps	$	25,509	$	132		$	2,233		$	28,240	$	203		$	2,099
Interest rate swaptions	—		—			—			370		32			—
Total	25,509		132			2,233			28,610		235			2,099
Derivatives not in hedge accounting relationships-
Interest rate swaps	17,889		740			691			38,159		927			785
Interest rate swaptions	6,290		164			—			4,820		179			—
Interest rate caps or floors	1,913		243			—			1,913		254			—
Mortgage delivery commitments	1,499		25			25			502		4			4
Total	27,591		1,172			716			45,394		1,364			789
Total before adjustments	$	53,100	1,304			2,949			$	74,004	1,599			2,888
Netting adjustments a			(1,214		)	(1,214		)			(1,461		)	(1,461		)
Exposure at fair value b			90			1,735					138			1,427
Cash collateral and related accrued interest			(35		)	(1,616		)			(98		)	(1,221		)
Derivative assets and liabilities			$	55		$	119				$	40		$	206

^a  Amounts represent the effect of legally enforceable master netting agreements that allow us to settle positive and negative positions.

^b  Includes net accrued interest receivable of $3 million as of September 30, 2012, and $13 million as of December 31, 2011.

Derivatives And Hedging Activities as Presented in the Statements of Income [Table Text Block]

The following tables present the components of derivatives and hedging activities as presented in the statements of income.

	Three months ended September 30,						Nine months ended September 30,
For the periods ending	2012			2011			2012			2011
Fair value hedges -
Interest rate swaps	$	—		$	(16	)	$	(3	)	$	(10	)
Other	—			2			1			(5		)
Fair value hedges - ineffectiveness net gain (loss)	—			(14		)	(2		)	(15		)
Cash flow hedges - ineffectiveness net gain (loss)	—			26			2			40
Economic hedges -
Interest rate swaps	(29		)	(180		)	(75		)	(185		)
Interest rate swaptions	6			201			24			141
Interest rate caps/floors	(2		)	42			(11		)	32
Interest rate futures/TBA	—			—			—			—
Mortgage delivery commitments	1			—			1			—
Net interest settlements	23			20			63			64
Economic hedges - net gain (loss)	(1		)	83			2			52
Net gains (losses) on derivatives and hedging activities	$	(1	)	$	95		$	2		$	77

Fair Value Hedges [Table Text Block]

The following table presents, by type of hedged item, the gains (losses) on derivatives and the related hedged items in fair value hedging relationships and the effect of those derivatives on our net interest income.

	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item			Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities			Effect of Derivatives on Net Interest Income a			Hedge Adjustments Amortized into Net Interest Income b
Three months ended September 30, 2012
Hedged item type -
Available-for-sale securities	$	(35	)	$	36		$	1		$	(33	)	$	—
Advances	(5		)	6			1			(19		)	—
MPF Loans held for portfolio	—			—			—			—			(12		)
Consolidated obligation bonds	(4		)	2			(2		)	31			(6		)
Total	$	(44	)	$	44		$	—		$	(21	)	$	(18	)
Three months ended September 30, 2011
Hedged item type -
Available-for-sale securities	$	(335	)	$	323		$	(12	)	$	(36	)	$	—
Advances	(43		)	44			1			(29		)	(42		)
MPF Loans held for portfolio	4			(2		)	2			(1		)	(12		)
Consolidated obligation bonds	162			(167		)	(5		)	79			(11		)
Total	$	(212	)	$	198		$	(14	)	$	13		$	(65	)
Nine months ended September 30, 2012
Hedged item type -
Available-for-sale investments	$	(112	)	$	111		$	(1	)	$	(98	)	$	—
Advances	(13		)	20			7			(64		)	(24		)
MPF Loans held for portfolio	1			—			1			(2		)	(39		)
Consolidated obligation bonds	3			(12		)	(9		)	111			(22		)
Total	$	(121	)	$	119		$	(2	)	$	(53	)	$	(85	)
Nine months ended September 30, 2011
Hedged item type -
Available-for-sale investments	$	(419	)	$	405		$	(14	)	$	(103	)	$	—
Advances	(26		)	34			8			(115		)	(51		)
MPF Loans held for portfolio	(2		)	(4		)	(6		)	(6		)	(37		)
Consolidated obligation bonds	291			(294		)	(3		)	239			(29		)
Total	$	(156	)	$	141		$	(15	)	$	15		$	(117	)

^a  Represents the effect of net interest settlements attributable to existing derivative hedging instruments on net interest income. The effect of derivatives on net interest income is included in the interest income/expense line item of the respective hedged item type.

^b  Amortization of hedge adjustments is included in the interest income/expense line item of the respective hedged item type.

Cash Flow Hedges [Table Text Block]

The following table presents our gains (losses) on our cash-flow hedging relationships recorded in income and other comprehensive income (loss). In the tables below, in cases where amounts are insignificant in the aggregate, we don't report a balance.

	Effective Portion Reclassified From AOCI to Interest			Ineffective Portion Reclassified to Derivatives and Hedging Activities			Total Reclassified Into Statements of Income			Effective Portion Recorded in AOCI			Total Change in OCI			Net Interest Settlements Effect on Net Interest Income a
Three months ended September 30, 2012
Advances - interest rate floors	$	3		$	—	b	$	3		$	—		$	(3	)	$	—
Discount notes -      interest rate caps	(1		)	—			(1		)	—			1			—
interest rate swaps	—			—			—			(33		)	(33		)	(67		)
Bonds - interest rate swaps	(1		)	—			(1		)	—			1			—
Total	$	1		$	—		$	1		$	(33	)	$	(34	)	$	(67	)
Three months ended September 30, 2011
Advances - interest rate floors	$	4		$	25	b	$	29		$	—		$	(29	)	$	—
Discount notes -      interest rate caps	(3		)	—			(3		)	—			3			—
interest rate swaps	(2		)	1			(1		)	(400		)	(399		)	(80		)
Bonds - interest rate swaps	(2		)	—			(2		)	—			2			—
Total	$	(3	)	$	26		$	23		$	(400	)	$	(423	)	$	(80	)
Nine months ended September 30, 2012
Advances - interest rate floors	$	11		$	—	b	$	11		$	—		$	(11	)	$	—
Discount notes -      interest rate caps	(5		)	—			(5		)	—			5			—
interest rate swaps	(2		)	2			—			(91		)	(91		)	(202		)
Bonds - interest rate swaps	(4		)	—			(4		)	—			4			—
Total	$	—		$	2		$	2		$	(91	)	$	(93	)	$	(202	)
Nine months ended September 30, 2011
Advances - interest rate floors	$	26		$	37	b	$	63		$	—		$	(63	)	$	—
Discount notes -      interest rate caps	(11		)	—			(11		)	—			11			—
interest rate swaps	(4		)	3			(1		)	(453		)	(452		)	(241		)
Bonds - interest rate swaps	(4		)	—			(4		)	—			4			—
Total	$	7		$	40		$	47		$	(453	)	$	(500	)	$	(241	)

^a  Represents the effect of net interest settlements attributable to open derivative hedging instruments on net interest income. The effect of     derivatives on net interest income is included in the interest income/expense line item of the respective hedged item type.

^b  Represents the recognition of previously deferred cash flow hedge adjustments related to advances in cash flow hedge relationships that were prepaid during the period.

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Background and Basis of Presentation

9 Months Ended

Sep. 30, 2012

Background [Abstract]

Background and Basis of Presentation [Text Block]

Background and Basis of Presentation

The Federal Home Loan Bank of Chicago ^a is a federally chartered corporation and one of 12 Federal Home Loan Banks (the FHLBs) that, with the Office of Finance, comprise the Federal Home Loan Bank System (the System).  The FHLBs are government-sponsored enterprises (GSE) of the United States of America and were organized under the Federal Home Loan Bank Act of 1932, as amended (FHLB Act), in order to improve the availability of funds to support home ownership.  We are supervised and regulated by the Federal Housing Finance Agency (FHFA), an independent federal agency in the executive branch of the United States government. We provide credit to members principally in the form of secured loans called advances. We also provide liquidity for home mortgage loans to members approved as Participating Financial Institutions (PFIs) through the Mortgage Partnership Finance^® (MPF^®) Program ^b.

Our accounting and financial reporting policies conform to generally accepted accounting principles in the United States of America (GAAP). The preparation of financial statements in conformity with GAAP requires the extensive use of management's estimates and assumptions that affect the reported amounts of assets and liabilities, as well as the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses. Actual results could differ from those estimates. Prior period amounts have been reclassified to conform to the current period presentation. We adopted the new FASB guidance on the presentation of comprehensive income that was issued in June of 2011 effective January 1, 2012. Specifically, we adopted on a retrospective basis and elected to present comprehensive income in two separate consecutive statements. The new guidance did not change the items that are currently reported in our other comprehensive income or when an item of other comprehensive income must be reclassified into net income. As a result, the effect of the new guidance on our financial statements was limited to how we present our financial statements. In the opinion of management, all normal recurring adjustments have been included for a fair statement of this interim financial information. These unaudited financial statements should be read in conjunction with the audited financial statements for the year ended December 31, 2011, included in our Annual Report on Form 10-K (2011 Form 10-K) filed with the SEC.

Our investments in variable interest entities (VIEs) include, but are not limited to, senior interests in private label mortgage-backed securities (MBS) and Federal Family Education Loan Program (FFELP) asset-backed securities (ABS). We have evaluated these VIEs for the periods presented, and determined that we are not required to apply consolidation accounting since we are not the primary beneficiary in any of these VIEs. Excluding contractually required amounts, we have not provided financial or other support (explicitly or implicitly) during the periods presented in our financial statements. Further, we do not intend to provide such support in the future. The carrying amounts and classification of the assets that relate to these VIEs are shown in investment securities in our statements of condition. We have no liabilities related to these VIEs. Our maximum loss exposure for our VIEs is limited to the carrying value.

For purposes of the statements of cash flows, we consider only cash and due from banks as cash and cash equivalents.

^a  Unless otherwise specified, references to we, us, our, and the Bank are to the Federal Home Loan Bank of Chicago.

^b  “Mortgage Partnership Finance”, “MPF”, and “MPF Xtra” are registered trademarks of the Federal Home Loan Bank of Chicago.

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Consolidated Obligations (Tables)

9 Months Ended

Sep. 30, 2012

Debt Disclosure [Abstract]

Consolidated Obligation Bonds [Table Text Block]

The following table presents our consolidated obligation bonds, for which we are the primary obligor, including callable bonds that are redeemable in whole, or in part, at our discretion on predetermined call dates.

As of September 30, 2012	Contractual Maturity		Weighted Average Interest Rate		Next Maturity or Call Date
Due in one year or less	$	7,646	3.37	%	$	19,153
One to two years	5,615		3.76	%	6,150
Two to three years	2,125		2.52	%	1,208
Three to four years	3,768		3.70	%	2,768
Four to five years	5,890		2.05	%	1,575
Thereafter	8,378		2.85	%	2,568
Total par value	$	33,422	3.06	%	$	33,422

Consolidated Obligation Discount Notes [Table Text Block]

The following table presents our consolidated obligation discount notes for which we are the primary obligor. All are due in one year or less.

	Carrying Value		Par Value		Weighted Average Interest Rate
As of September 30, 2012	$	27,231	$	27,235	0.13	%
As of December 31, 2011	25,404		25,411		0.05	%

Consolidated Obligation Bonds Outstanding by Call Feature [Table Text Block]

The following table presents consolidated obligation bonds outstanding by call feature:

As of	September 30, 2012			December 31, 2011
Noncallable	$	20,759		$	24,479
Callable	12,663			15,485
Total par value	33,422			39,964
Bond premiums (discounts), net	14			19
Hedging adjustments	(70		)	(104		)
Fair value option adjustments	—			1
Total consolidated obligation bonds	$	33,366		$	39,880

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Investment Securities (Trading Securities) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Trading Securities [Line Items]
Trading securities	$ 2,685		$ 2,935
Net year-to-date unrealized gains (losses) on trading securities	(35)	(39)
U.S. Government & Other Government Related [Member]
Trading Securities [Line Items]
Trading securities	2,545		2,737
GSE residential MBS [Member]
Trading Securities [Line Items]
Trading securities	137		195
Government-guaranteed residential MBS [Member]
Trading Securities [Line Items]
Trading securities	3		3
MBS [Member]
Trading Securities [Line Items]
Trading securities	$ 140		$ 198

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MPF Loans (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010
Mortgage Loans on Real Estate [Line Items]
Total unpaid principal balance	$ 11,162		$ 13,965
Net premiums, credit enhancement and deferred loan fees	41		53
MPF hedging adjustments	107		145
Total before allowance for credit losses	11,310		14,163
Allowance for credit losses	(44)		(45)
Total MPF Loans held in portfolio, net	11,266		14,118
Medium term (15 years or less) [Member]
Mortgage Loans on Real Estate [Line Items]
Total unpaid principal balance	2,827		3,810
Long term (greater than 15 years) [Member]
Mortgage Loans on Real Estate [Line Items]
Total unpaid principal balance	8,335		10,155
Conventional [Member]
Mortgage Loans on Real Estate [Line Items]
Total unpaid principal balance	8,954		11,433
Allowance for credit losses	(44)	(48)	(45)	(41)	(39)	(33)
Government [Member]
Mortgage Loans on Real Estate [Line Items]
Total unpaid principal balance	$ 2,208		$ 2,532

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Fair Value Accounting (Level 3 Reconciliation) (Details) (Fair Value, Measurements, Recurring [Member], Level 3 [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Consolidated Obligation Bonds [Member]
Level 3 Liabilities [Roll Forward]
Beginning Balance	$ (87)	$ (78)
Change in fair value included in earnings in derivatives and hedging activities	5	(7)
Included in net change in fair value on OTTI AFS securities in OCI	0	0
Paydowns and settlements	0	0
Ending Balance	(82)	(85)
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	5	(7)
Derivative Assets, Interest Rate Related [Member]
Level 3 Assets [Roll Forward]
Beginning Balance	37	29
Change in fair value included in earnings in derivatives and hedging activities	(5)	7
Included in net change in fair value on OTTI AFS securities in OCI	0	0
Paydowns and settlements	0	0
Ending Balance	32	36
Level 3 Liabilities [Roll Forward]
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	(5)	7
Private-label residential MBS [Member]
Level 3 Assets [Roll Forward]
Beginning Balance	63	76
Change in fair value included in earnings in derivatives and hedging activities	0	0
Included in net change in fair value on OTTI AFS securities in OCI	16	2
Paydowns and settlements	(10)	(11)
Ending Balance	69	67
Level 3 Liabilities [Roll Forward]
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	$ 0	$ 0

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Statements of Condition (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Assets
Cash and due from banks	$ 25		$ 1,002
Federal Funds sold	1,948		950
Securities purchased under agreements to resell	3,049		825
Investment securities -
Trading, $0 and $15 pledged	2,685		2,935
Available-for-sale, $0 and $14 pledged	23,829		24,316
Held-to-maturity, $0 and $490 pledged	9,790	[1]	11,477	[1]
Total investment securities	36,304		38,728
Advances, $9 and $9 carried at fair value	13,531		15,291
MPF Loans held in portfolio, net of allowance for credit losses of $(44) and $(45)	11,266		14,118
Accrued interest receivable	127		153
Derivative assets	55		40
Software and equipment, net of accumulated amortization/depreciation of $(153) and $(143)	34		38
Other assets	105		110
Total assets	66,444		71,255
Deposits -
Interest bearing	655		535
Non-interest bearing	75		113
Total deposits	730		648
Securities sold under agreements to repurchase	0		400
Consolidated obligations, net
Discount Notes, $2,258 and $11,466 carried at fair value	27,231		25,404
Bonds, $855 and $2,631 carried at fair value	33,366		39,880
Total consolidated obligations, net	60,597		65,284
Accrued interest payable	289		203
Mandatorily redeemable capital stock	10	[2]	4
Derivative liabilities	119		206
Affordable Housing Program assessment payable	72		61
Other liabilities	295		157
Subordinated notes	1,000		1,000
Total liabilities	63,112		67,963
Capital
Class B-1 Capital stock - putable $100 par value - 1 million shares issued and outstanding at September 30, 2012	86
Class B-2 Capital stock, - putable $100 par value - 16 million shares issued and outstanding at September 30, 2012	1,616
Total Capital stock - putable $100 par value -17 million shares issued and outstanding at September 30, 2012, and 24 million shares issued and outstanding at December 31, 2011	1,702		2,402
Retained Earnings, unrestricted	1,506		1,289
Retained Earnings, restricted	87		32
Total retained earnings	1,593		1,321
Accumulated other comprehensive income (loss)	37		(431)
Total capital	3,332		3,292
Total liabilities and capital	$ 66,444		$ 71,255

[1] Fair value of held-to-maturity securities: $10,690 and $12,131.

[2] All MRCS outstanding at the end of the period are redeemable in five years.

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Investment Securities (Maturity Terms) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Schedule of Securities by Contractual Maturity [Line Items]
Available-For-Sale, Total Amortized Cost	$ 22,250
Available-For-Sale, Total Fair Value	23,829
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	9,790
Held-To-Maturity, Total Fair Value	10,690
AFS Securities, excluding ABS and MBS [Member]
Schedule of Securities by Contractual Maturity [Line Items]
Available-For-Sale, Due in One Year or Less, Amortized Cost	0
Available-For-Sale, Due in One Year or Less, Fair Value	0
Available-For-Sale, Due after One Year Through Five Years, Amortized Cost	113
Available-For-Sale, Due after One Year Through Five Years, Fair Value	122
Available-For-Sale, Due after Five Years Through Ten Years, Amortized Cost	105
Available-For-Sale, Due after Five Years Through Ten Years, Fair Value	114
Available-For-Sale, Due after Ten Years, Amortized Cost	495
Available-For-Sale, Due after Ten Years, Fair Value	540
Available-For-Sale, Total Amortized Cost	713
Available-For-Sale, Total Fair Value	776
HTM Securities, excluding ABS and MBS [Member]
Schedule of Securities by Contractual Maturity [Line Items]
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount	506
Held-To-Maturity, Due in One Year or Less, Fair Value	509
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	58
Held-To-Maturity, Due after One Year Through Five Years, Fair Value	59
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	493
Held-To-Maturity, Due after Five Years Through Ten Years, Fair Value	520
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	1,220
Held-To-Maturity, Due after Ten Years, Fair Value	1,328
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	2,277
Held-To-Maturity, Total Fair Value	2,416
Asset-backed Securities [Member]
Schedule of Securities by Contractual Maturity [Line Items]
Available-For-Sale, Total Amortized Cost	21,537
Available-For-Sale, Total Fair Value	23,053
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	7,513
Held-To-Maturity, Total Fair Value	$ 8,274

XML

Statements of Capital (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning					$ 3,292		$ 2,949
Comprehensive income	348		64		743		318
Proceeds from issuance of capital stock, par value					144		61
Repurchases of capital stock, par value					(790)
Capital stock reclassified to mandatorily redeemable capital stock					(54)		(4)
Cash dividends on capital stock					(3)		(2)
Balance, ending	3,332		3,322		3,332		3,322
Common Stock Putable [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares, beginning					24	[1],[2]	23	[1]
Balance, beginning					2,402	[2]	2,333
Proceeds from issuance of capital stock, shares					1	[1]	1	[1]
Proceeds from issuance of capital stock, par value					144		61
Repurchases of capital stock, shares					(8)	[1]
Repurchases of capital stock, par value					(790)
Capital stock reclassified to mandatorily redeemable capital stock, shares					0	[1]	0	[1]
Capital stock reclassified to mandatorily redeemable capital stock					(54)		(4)
Shares, ending	17	[1]	24	[1]	17	[1]	24	[1]
Balance, ending	1,702		2,390		1,702		2,390
Retained Earnings, Unrestricted [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning					1,289		1,099
Comprehensive income					220		180
Cash dividends on capital stock					(3)		(2)
Balance, ending	1,506		1,277		1,506		1,277
Retained Earnings, Restricted [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning					32		0
Comprehensive income					55		28
Cash dividends on capital stock					0		0
Balance, ending	87		28		87		28
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning					1,321		1,099
Comprehensive income					275		208
Cash dividends on capital stock					(3)		(2)
Balance, ending	1,593		1,305		1,593		1,305
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning					(431)		(483)
Comprehensive income					468		110
Balance, ending	$ 37		$ (373)		$ 37		$ (373)

[1] Excludes outstanding shares reclassified to mandatorily redeemable capital stock.

[2] On January 1, 2012 Capital Stock, shares and par value, were converted to B-1 and B-2 shares under our new Capital Plan.

XML

Derivatives and Hedging Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Maximum amount of additional collateral at fair value to our derivatives counterparties if our credit rating had been lowered to the next lower rating	$ 91
Deferred net gains on derivative instruments in AOCI that are expected to be reclassified to earnings during the next twelve month	$ 10
Maximum Hedging Period For Forecasted Cash Flows For Transactions, Excluding Payment of Variable Interest on Existing Financial Instruments	8 years

XML

Fair Value Accounting (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Significant Inputs of MBS and Non-MBS Investment Securities [Table Text Block]

The significant unobservable inputs used by third party pricing services in the fair value measurement of our private-label residential MBS are prepayment rates, probability of default, and loss severity in the event of default. Significant increases (decreases) in any of those inputs in isolation may result in a significantly lower (higher) fair value measurement. Generally, a change in the assumption used for the probability of default is accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for prepayment rates.

The table below provides the investment securities in which fair value is provided to us by third party pricing services.

				Range of Pricing Services Values
As of September 30, 2012	Portfolios	Fair Value		Minimum		Maximum
Private-label residential MBS - OTTI	AFS	$	69	$	62	$	75
Private-label residential MBS - OTTI	HTM	3		3		3

Valuation Techniques and Significant Inputs [Table Text Block]

Derivative Assets

The following table shows the range of values for our derivative assets that are carried at fair value under a fair value hedge strategy on our statements of condition using Level 3 significant inputs.

As of September 30, 2012	Significant Inputs Curve	Fair Value
Derivative Assets	LIBOR	$	32

Consolidated obligations

The following table shows the applicable curve of our consolidated obligations that are carried at fair value under a fair value hedge strategy on our statements of condition using Level 3 significant inputs.

As of September 30, 2012	Significant Inputs Curve	Fair Value
Non-callable consolidated obligation bonds	CO	$	82

Impaired MPF Loans and Real Estate Owned

See Assets Measured at Fair Value on a Nonrecurring Basis on page 41.

Fair Value Measurement [Table Text Block]

The following tables are a summary of fair value estimates and for the current period table the related level in the fair value hierarchy for financial instruments. It excludes non-financial items, for example, real estate owned. The carrying amounts in the following tables are recorded in the statements of condition under the indicated captions. These tables do not represent an estimate of the overall market value of us as a going concern; as they do not take into account future business opportunities and future net profitability of assets and liabilities. 

	September 30, 2012
			Fair Value
	Carrying  Value		Total		Level 1		Level 2			Level 3			Netting Adjustment/ Cash Collateral a
Financial Assets
Cash and due from banks	$	25	$	25	$	25	$	—		$	—		$	—
Federal Funds sold	1,948		1,948		—		1,948			—			—
Securities purchased under agreements to resell	3,049		3,049		—		3,049			—			—
Trading securities	2,685		2,685		—		2,685			—			—
Available-for-sale securities	23,829		23,829		—		23,760			69			—
Held-to-maturity securities	9,790		10,690		—		8,897			1,793			—
Advances	13,531		13,828		—		13,828			—			—
MPF Loans held in portfolio, net	11,266		12,205		—		11,997			208			—
Accrued interest receivable	127		127		—		127			—			—
Derivative assets	55		55		—		1,272		b	32		b	(1,249		)
Financial Liabilities
Deposits	$	730	$	730	$	—	$	730		$	—		$	—
Securities sold under agreements to repurchase	—		—		—		—			—			—
Consolidated obligations -
Discount notes	27,231		27,231		—		27,231			—			—
Bonds	33,366		35,304		—		35,222			82		c	—
Accrued interest payable	289		289		—		289			—			—
Mandatorily redeemable capital stock	10		10		10		—			—			—
Derivative liabilities	119		119		—		2,949			—			(2,830		)
Subordinated notes	1,000		1,137		—		1,137			—			—

^a  Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

^b  Our derivative assets are, in part, secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

^c  Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

	December 31, 2011
	Carrying Value		Fair Value
Financial Assets
Cash and due from banks	$	1,002	$	1,002
Federal Funds sold	950		950
Securities purchased under agreements to resell	825		825
Trading securities	2,935		2,935
Available-for-sale securities	24,316		24,316
Held-to-maturity securities	11,477		12,131
Advances	15,291		15,663
MPF Loans held in portfolio, net	14,118		15,177
Accrued interest receivable	153		153
Derivative assets	40		40
Financial Liabilities
Deposits	$	648	$	648
Securities sold under agreements to repurchase	400		400
Consolidated obligations -
Discount notes	25,404		25,404
Bonds	39,880		42,163
Accrued interest payable	203		203
Mandatorily redeemable capital stock	4		4
Derivative liabilities	206		206
Subordinated notes	1,000		1,127

Assets and Liabilities Measured at Fair Value on a Recurring Basis [Table Text Block]

The following table presents, for each hierarchy level, our assets and liabilities that are measured at fair value on the statements of condition:

As of September 30, 2012	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	2,545			$	—			$	—		$	2,545
GSE residential MBS	—		137				—				—			137
Governmental-guaranteed residential MBS	—		3				—				—			3
Total Trading Securities	—		2,685				—				—			2,685
AFS securities:
U.S. Government & other government related	—		776				—				—			776
FFELP ABS	—		7,687				—				—			7,687
GSE residential MBS	—		12,326				—				—			12,326
Government-guaranteed residential MBS	—		2,971				—				—			2,971
Private-label residential MBS	—		—				69				—			69
Total AFS Securities	—		23,760				69				—			23,829
Advances	—		9				—				—			9
Derivative assets	—		1,272			b	32			b	(1,249		)	55
Total assets at fair value	$	—	$	27,726			$	101			$	(1,249	)	$	26,578
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation discount notes	$	—	$	(2,258	)		$	—			$	—		$	(2,258	)
Consolidated obligation bonds	—		(855		)		(82		)	c	—			(937		)
Derivative liabilities	—		(2,949		)	b	—				2,830			(119		)
Total liabilities at fair value	$	—	$	(6,062	)		$	(82	)		$	2,830		$	(3,314	)
Level 3 as a percent of total liabilities at fair value							2.5		%

^a  Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

^b  Our derivative assets are, in part secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

^c  Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

As of December 31, 2011	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	2,737			$	—			$	—		$	2,737
GSE residential MBS	—		195				—				—			195
Governmental-guaranteed residential MBS	—		3				—				—			3
Total Trading Securities	—		2,935				—				—			2,935
AFS securities:
U.S. Government & other government related	—		1,001				—				—			1,001
FFELP ABS	—		8,159				—				—			8,159
GSE residential MBS	—		12,132				—				—			12,132
Government-guaranteed residential MBS	—		2,961				—				—			2,961
Private-label residential MBS	—		—				63				—			63
Total AFS Securities	—		24,253				63				—			24,316
Advances	—		9				—				—			9
Derivative assets	—		1,562			b	37			b	(1,559		)	40
Total assets at fair value	$	—	$	28,759			$	100			$	(1,559	)	$	27,300
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation discount notes	$	—	$	(11,466	)		$	—			$	—		$	(11,466	)
Consolidated obligation bonds	—		(2,631		)		(87		)	c	—			(2,718		)
Derivative liabilities	—		(2,888		)	b	—				2,682			(206		)
Total liabilities at fair value	$	—	$	(16,985	)		$	(87	)		$	2,682		$	(14,390	)
Level 3 as a percent of total liabilities at fair value							0.6		%

^a  Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

^b  Our derivative assets are, in part, secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

^c  Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

Level 3 Disclosures for all Assets and Liabilities that are Measured at Fair Value on a Recurring Basis [Table Text Block]

The following table presents a reconciliation of all assets and liabilities that are measured at fair value on the statements of condition using significant unobservable inputs (Level 3):

	Level 3 Assets/Liabilities
	Available-For-Sale Private-Label MBS			Derivative Assets Interest-Rate Related			Consolidated Obligation Bonds
At December 31, 2011	$	63		$	37		$	(87	)
Gains (losses) realized and unrealized:
Change in fair value included in earnings in derivatives and hedging activities	—			(5		)	5
Included in net change in fair value on OTTI AFS securities in OCI	16			—			—
Paydowns and settlements	(10		)	—			—
At September 30, 2012	$	69		$	32		$	(82	)
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	$	—		$	(5	)	$	5
At December 31, 2010	$	76		$	29		$	(78	)
Gains (losses) realized and unrealized:
Change in fair value included in earnings in derivatives and hedging activities	—			7			(7		)
Included in net change in fair value on OTTI AFS securities in OCI	2			—			—
Paydowns and settlements	(11		)	—			—
At September 30, 2011	$	67		$	36		$	(85	)
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	$	—		$	7		$	(7	)

Assets Measured at Fair Value on a Nonrecurring Basis [Table Text Block]

	September 30, 2012						December 31, 2011
	Level 1		Level  2		Level  3		Level 1		Level  2		Level  3
Held-to-maturity - Private-label residential MBS	$	—	$	—	$	3	$	—	$	—	$	9
Impaired MPF Loans	—		—		208		—		—		193
Real estate owned	—		—		18		—		—		16
Total non-recurring assets	$	—	$	—	$	229	$	—	$	—	$	218

Fair Value Option [Table Text Block]

The following tables summarize the activity related to financial assets and liabilities for which we elected the fair value option: 

	September 30, 2012								September 30, 2011
			Consolidated Obligation								Consolidated Obligation
	Advances		Bonds			Discount Notes			Advances		Bonds			Discount Notes
For the three months ended
Balance beginning of period	$	9	$	(7,017	)	$	(4,135	)	$	9	$	(4,073	)	$	(1,202	)
New transactions elected for fair value option	—		(6,300		)	—			—		(4,885		)	(5,499		)
Maturities and extinguishments	—		12,465			1,878			—		4,150			100
Net gain (loss) on instruments held at fair value	—		(6		)	—			—		—			—
Change in accrued interest and other	—		3			(1		)	—		(4		)	(2		)
Balance end of period	$	9	$	(855	)	$	(2,258	)	$	9	$	(4,812	)	$	(6,603	)
For the nine months ended
Balance beginning of period	$	9	$	(2,631	)	$	(11,466	)	$	4	$	(9,425	)	$	(4,864	)
New transactions elected for fair value option	—		(15,190		)	—			5		(9,044		)	(5,649		)
Maturities and extinguishments	—		16,965			9,214			—		13,669			3,916
Net gain (loss) on instruments held at fair value	—		—			2			—		(13		)	—
Change in accrued interest and other	—		1			(8		)	—		1			(6		)
Balance end of period	$	9	$	(855	)	$	(2,258	)	$	9	$	(4,812	)	$	(6,603	)

Fair Value Option, Quantitative Disclosure, Difference Between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding [Table Text Block]

The following table reflects the difference between the aggregate unpaid principal balance (UPB) outstanding and the aggregate fair value for advances and consolidated obligation bonds for which the fair value option has been elected. None of the advances were 90 days or more past due and none were on nonaccrual status.

	September 30, 2012								December 31, 2011
As of	Unpaid Principal Balance			Fair Value			Fair Value Over (Under) UPB		Unpaid Principal Balance			Fair Value			Fair Value Over (Under) UPB
Advances	$	9		$	9		$	—	$	9		$	9		$	—
Consolidated obligation bonds	(855		)	(855		)	—		(2,630		)	(2,631		)	1
Consolidated obligation discount notes	(2,258		)	(2,258		)	—		(11,465		)	(11,466		)	1

XML

Subordinated Notes (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Dec. 31, 2011
Subordinated Debt [Abstract]
Annual Phase-outs of Designated Amount of Subordinated Notes Included in Regulatory Leverage Compliance, Percentage	20.00%
Designated Amount of Subordinated Notes Included in Regulatory Leverage Compliance	$ 800

XML

Fair Value Accounting

9 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Fair Value Accounting [Text Block]

Fair Value Accounting

Fair Value Measurement

We record trading securities, AFS securities, derivative assets, and derivative liabilities at fair value. We also carry advances and consolidated obligations at fair value when we elect the fair value option for them. The fair value amounts recorded on the statements of condition and presented in the note disclosures have been determined by us using available market information and our judgment of appropriate valuation methods. These estimates are based on pertinent information available to us as of the dates presented. Estimates of the fair value of advances with options, mortgage instruments, derivatives with embedded options and consolidated obligation bonds with options using the methods described below, and other methods, are highly subjective and require judgments regarding significant matters such as the amount and timing of future cash flows, prepayment speed assumptions, expected interest rate volatility, possible distributions of future interest rates used to value options, and the selection of discount rates that appropriately reflect market and credit risks. The use of different assumptions could have a material effect on estimated fair value. Although we believe our estimated fair values are reasonable, there are inherent limitations in any valuation technique. Therefore, these fair values are not necessarily indicative of the amounts that would be realized in current market transactions, although they do reflect our judgment of how a market participant would estimate the fair values. These estimates are susceptible to material near term changes because they are made as of a specific point in time.

Fair Value Hierarchy

The fair value hierarchy is used to prioritize the valuation techniques as well as the inputs used to measure fair value for assets and liabilities carried at fair value on the statements of condition. The fair value hierarchy requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The inputs are evaluated and an overall level for the fair value measurement is determined. This overall level is an indication of market observability of the fair value measurement for the asset or liability.

Outlined below is the application of the fair value hierarchy to our financial assets and financial liabilities that are carried at fair value or disclosed in the notes to the financial statements:

Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that we can access at the measurement date.

Level 2inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. If the asset or liability has a specified (contractual) term, a Level 2 input must be observable for substantially the full term of the asset or liability. Level 2 inputs include the following:

a. Quoted prices for similar assets or liabilities in active markets

b. Quoted prices for identical or similar assets, or liabilities, in markets that are not active

c. Inputs other than quoted prices, that are observable for the asset or liability, for example:

1. Interest rates and yield curves observable at commonly quoted intervals

2. Implied volatilities

3. Credit spreads

d. Market-corroborated inputs.

Level 3 inputs are unobservable inputs for the asset or liability. Unobservable inputs are used to measure fair value to the extent that relevant observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date. However, the fair value measurement objective remains the same, that is, an exit price at the measurement date from the perspective of a market participant that holds the asset or owes the liability. Therefore, unobservable inputs shall reflect the assumptions that market participants would use when pricing the asset or liability, including assumptions about risk.

For instruments carried at fair value, we review the fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation attributes may result in a reclassification of financial assets or liabilities from one level to another. Such reclassifications are reported as transfers in/out at fair value as of the beginning of the quarter in which the changes occur. We had no such transfers for the periods presented.

Valuation Techniques and Significant Inputs

A description of the valuation techniques and significant inputs is disclosed in Note 20 - Fair Value Accounting in our 2011 Form 10-K. There have been no significant changes in our valuation techniques since then.

Unobservable Level 3 significant inputs of financial instruments that are carried at fair value in our statements of condition are disclosed below.

Private-Label Residential MBS

The significant unobservable inputs used by third party pricing services in the fair value measurement of our private-label residential MBS are prepayment rates, probability of default, and loss severity in the event of default. Significant increases (decreases) in any of those inputs in isolation may result in a significantly lower (higher) fair value measurement. Generally, a change in the assumption used for the probability of default is accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for prepayment rates.

The table below provides the investment securities in which fair value is provided to us by third party pricing services.

				Range of Pricing Services Values
As of September 30, 2012	Portfolios	Fair Value		Minimum		Maximum
Private-label residential MBS - OTTI	AFS	$	69	$	62	$	75
Private-label residential MBS - OTTI	HTM	3		3		3

Derivative Assets

The following table shows the range of values for our derivative assets that are carried at fair value under a fair value hedge strategy on our statements of condition using Level 3 significant inputs.

As of September 30, 2012	Significant Inputs Curve	Fair Value
Derivative Assets	LIBOR	$	32

Consolidated obligations

The following table shows the applicable curve of our consolidated obligations that are carried at fair value under a fair value hedge strategy on our statements of condition using Level 3 significant inputs.

As of September 30, 2012	Significant Inputs Curve	Fair Value
Non-callable consolidated obligation bonds	CO	$	82

Impaired MPF Loans and Real Estate Owned

See Assets Measured at Fair Value on a Nonrecurring Basis on page 41.

Fair Value Estimates for Financial Instruments

The following tables are a summary of fair value estimates and for the current period table the related level in the fair value hierarchy for financial instruments. It excludes non-financial items, for example, real estate owned. The carrying amounts in the following tables are recorded in the statements of condition under the indicated captions. These tables do not represent an estimate of the overall market value of us as a going concern; as they do not take into account future business opportunities and future net profitability of assets and liabilities. 

	September 30, 2012
			Fair Value
	Carrying  Value		Total		Level 1		Level 2			Level 3			Netting Adjustment/ Cash Collateral a
Financial Assets
Cash and due from banks	$	25	$	25	$	25	$	—		$	—		$	—
Federal Funds sold	1,948		1,948		—		1,948			—			—
Securities purchased under agreements to resell	3,049		3,049		—		3,049			—			—
Trading securities	2,685		2,685		—		2,685			—			—
Available-for-sale securities	23,829		23,829		—		23,760			69			—
Held-to-maturity securities	9,790		10,690		—		8,897			1,793			—
Advances	13,531		13,828		—		13,828			—			—
MPF Loans held in portfolio, net	11,266		12,205		—		11,997			208			—
Accrued interest receivable	127		127		—		127			—			—
Derivative assets	55		55		—		1,272		b	32		b	(1,249		)
Financial Liabilities
Deposits	$	730	$	730	$	—	$	730		$	—		$	—
Securities sold under agreements to repurchase	—		—		—		—			—			—
Consolidated obligations -
Discount notes	27,231		27,231		—		27,231			—			—
Bonds	33,366		35,304		—		35,222			82		c	—
Accrued interest payable	289		289		—		289			—			—
Mandatorily redeemable capital stock	10		10		10		—			—			—
Derivative liabilities	119		119		—		2,949			—			(2,830		)
Subordinated notes	1,000		1,137		—		1,137			—			—

^a  Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

^b  Our derivative assets are, in part, secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

^c  Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

	December 31, 2011
	Carrying Value		Fair Value
Financial Assets
Cash and due from banks	$	1,002	$	1,002
Federal Funds sold	950		950
Securities purchased under agreements to resell	825		825
Trading securities	2,935		2,935
Available-for-sale securities	24,316		24,316
Held-to-maturity securities	11,477		12,131
Advances	15,291		15,663
MPF Loans held in portfolio, net	14,118		15,177
Accrued interest receivable	153		153
Derivative assets	40		40
Financial Liabilities
Deposits	$	648	$	648
Securities sold under agreements to repurchase	400		400
Consolidated obligations -
Discount notes	25,404		25,404
Bonds	39,880		42,163
Accrued interest payable	203		203
Mandatorily redeemable capital stock	4		4
Derivative liabilities	206		206
Subordinated notes	1,000		1,127

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents, for each hierarchy level, our assets and liabilities that are measured at fair value on the statements of condition:

As of September 30, 2012	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	2,545			$	—			$	—		$	2,545
GSE residential MBS	—		137				—				—			137
Governmental-guaranteed residential MBS	—		3				—				—			3
Total Trading Securities	—		2,685				—				—			2,685
AFS securities:
U.S. Government & other government related	—		776				—				—			776
FFELP ABS	—		7,687				—				—			7,687
GSE residential MBS	—		12,326				—				—			12,326
Government-guaranteed residential MBS	—		2,971				—				—			2,971
Private-label residential MBS	—		—				69				—			69
Total AFS Securities	—		23,760				69				—			23,829
Advances	—		9				—				—			9
Derivative assets	—		1,272			b	32			b	(1,249		)	55
Total assets at fair value	$	—	$	27,726			$	101			$	(1,249	)	$	26,578
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation discount notes	$	—	$	(2,258	)		$	—			$	—		$	(2,258	)
Consolidated obligation bonds	—		(855		)		(82		)	c	—			(937		)
Derivative liabilities	—		(2,949		)	b	—				2,830			(119		)
Total liabilities at fair value	$	—	$	(6,062	)		$	(82	)		$	2,830		$	(3,314	)
Level 3 as a percent of total liabilities at fair value							2.5		%

^a  Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

^b  Our derivative assets are, in part secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

^c  Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

As of December 31, 2011	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	2,737			$	—			$	—		$	2,737
GSE residential MBS	—		195				—				—			195
Governmental-guaranteed residential MBS	—		3				—				—			3
Total Trading Securities	—		2,935				—				—			2,935
AFS securities:
U.S. Government & other government related	—		1,001				—				—			1,001
FFELP ABS	—		8,159				—				—			8,159
GSE residential MBS	—		12,132				—				—			12,132
Government-guaranteed residential MBS	—		2,961				—				—			2,961
Private-label residential MBS	—		—				63				—			63
Total AFS Securities	—		24,253				63				—			24,316
Advances	—		9				—				—			9
Derivative assets	—		1,562			b	37			b	(1,559		)	40
Total assets at fair value	$	—	$	28,759			$	100			$	(1,559	)	$	27,300
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation discount notes	$	—	$	(11,466	)		$	—			$	—		$	(11,466	)
Consolidated obligation bonds	—		(2,631		)		(87		)	c	—			(2,718		)
Derivative liabilities	—		(2,888		)	b	—				2,682			(206		)
Total liabilities at fair value	$	—	$	(16,985	)		$	(87	)		$	2,682		$	(14,390	)
Level 3 as a percent of total liabilities at fair value							0.6		%

^a  Amounts represent the effect of legally enforceable master netting agreements and futures contracts margin accounts that allow us to settle positive and negative positions and also cash collateral held or placed with the same counterparties.

^b  Our derivative assets are, in part, secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

^c  Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

Level 3 Disclosures for all Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The following table presents a reconciliation of all assets and liabilities that are measured at fair value on the statements of condition using significant unobservable inputs (Level 3):

	Level 3 Assets/Liabilities
	Available-For-Sale Private-Label MBS			Derivative Assets Interest-Rate Related			Consolidated Obligation Bonds
At December 31, 2011	$	63		$	37		$	(87	)
Gains (losses) realized and unrealized:
Change in fair value included in earnings in derivatives and hedging activities	—			(5		)	5
Included in net change in fair value on OTTI AFS securities in OCI	16			—			—
Paydowns and settlements	(10		)	—			—
At September 30, 2012	$	69		$	32		$	(82	)
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	$	—		$	(5	)	$	5
At December 31, 2010	$	76		$	29		$	(78	)
Gains (losses) realized and unrealized:
Change in fair value included in earnings in derivatives and hedging activities	—			7			(7		)
Included in net change in fair value on OTTI AFS securities in OCI	2			—			—
Paydowns and settlements	(11		)	—			—
At September 30, 2011	$	67		$	36		$	(85	)
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	$	—		$	7		$	(7	)

Assets Measured at Fair Value on a Nonrecurring Basis

The table below presents assets that are measured at fair value on a nonrecurring basis as of the dates shown. These assets are subject to being measured at fair value as a result of becoming impaired during the reporting period or in the case of REO when fair value declines during the reporting period. Held-to-maturity, private-label residential MBS are measured at fair value using the same methodology and significant assumptions utilized for available-for-sale private-label residential MBS. If available, broker price opinions are used to measure impaired MPF Loans or REO. If a current broker price opinion is not available, we estimate fair value based on current actual loss severity rates we have incurred on sales, excluding any estimated selling costs. See Note 8 - Allowance for Credit Losses for further details. Significant increases (decreases) in the loss severity rate input in isolation may result in a significantly lower (higher) fair value measurement.

	September 30, 2012						December 31, 2011
	Level 1		Level  2		Level  3		Level 1		Level  2		Level  3
Held-to-maturity - Private-label residential MBS	$	—	$	—	$	3	$	—	$	—	$	9
Impaired MPF Loans	—		—		208		—		—		193
Real estate owned	—		—		18		—		—		16
Total non-recurring assets	$	—	$	—	$	229	$	—	$	—	$	218

Fair Value Option

We elected the fair value option for advances, discount notes, and short-term consolidated obligation bonds for which hedge accounting treatment may not be achieved. Specifically, hedge accounting may not be achieved in cases where it may be difficult to pass prospective or retrospective effectiveness testing under derivative hedge accounting guidance even though the interest rate swaps used to hedge these financial instruments have matching terms. Accordingly, electing the fair value option allows us to better match the change in fair value of the advance, discount note, and short-term consolidated obligation bonds with the interest rate swap economically hedging it.

Under the fair value option, fair value is used for both the initial and subsequent measurement of the designated assets and liabilities, with the changes in fair value recognized in non-interest gain (loss). Interest income and interest expense carried on other financial assets or liabilities carried at fair value is recognized under the interest method based solely on the contractual amount of interest due or unpaid. Any transaction fees or costs are immediately recognized into other non-interest gain (loss) or other non-interest expense.

The following tables summarize the activity related to financial assets and liabilities for which we elected the fair value option: 

	September 30, 2012								September 30, 2011
			Consolidated Obligation								Consolidated Obligation
	Advances		Bonds			Discount Notes			Advances		Bonds			Discount Notes
For the three months ended
Balance beginning of period	$	9	$	(7,017	)	$	(4,135	)	$	9	$	(4,073	)	$	(1,202	)
New transactions elected for fair value option	—		(6,300		)	—			—		(4,885		)	(5,499		)
Maturities and extinguishments	—		12,465			1,878			—		4,150			100
Net gain (loss) on instruments held at fair value	—		(6		)	—			—		—			—
Change in accrued interest and other	—		3			(1		)	—		(4		)	(2		)
Balance end of period	$	9	$	(855	)	$	(2,258	)	$	9	$	(4,812	)	$	(6,603	)
For the nine months ended
Balance beginning of period	$	9	$	(2,631	)	$	(11,466	)	$	4	$	(9,425	)	$	(4,864	)
New transactions elected for fair value option	—		(15,190		)	—			5		(9,044		)	(5,649		)
Maturities and extinguishments	—		16,965			9,214			—		13,669			3,916
Net gain (loss) on instruments held at fair value	—		—			2			—		(13		)	—
Change in accrued interest and other	—		1			(8		)	—		1			(6		)
Balance end of period	$	9	$	(855	)	$	(2,258	)	$	9	$	(4,812	)	$	(6,603	)

For items recorded under the fair value option, the related contractual interest income and contractual interest expense is recorded as part of net interest income on the statements of income. The remaining change in fair value for instruments in which the fair value option has been elected is recorded in non-interest gain (loss) on instruments held under fair value option in the statements of income. We determined that no adjustments to the fair values of our instruments recorded under the fair value option for instrument-specific credit risk were necessary as of the dates presented.

The following table reflects the difference between the aggregate unpaid principal balance (UPB) outstanding and the aggregate fair value for advances and consolidated obligation bonds for which the fair value option has been elected. None of the advances were 90 days or more past due and none were on nonaccrual status.

	September 30, 2012								December 31, 2011
As of	Unpaid Principal Balance			Fair Value			Fair Value Over (Under) UPB		Unpaid Principal Balance			Fair Value			Fair Value Over (Under) UPB
Advances	$	9		$	9		$	—	$	9		$	9		$	—
Consolidated obligation bonds	(855		)	(855		)	—		(2,630		)	(2,631		)	1
Consolidated obligation discount notes	(2,258		)	(2,258		)	—		(11,465		)	(11,466		)	1

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2012

Commitments and Contingencies Disclosure [Abstract]

Off-Balance Sheet Commitments [Table Text Block]

The following table shows our commitments outstanding but not yet incurred or recorded in our statements of condition.

As of	September 30, 2012						December 31, 2011
	Expire within one year		Expire after one year		Total		Expire within one year		Expire after one year		Total
Unsettled consolidated obligation bonds	$	2,926	$	—	$	2,926	$	150	$	—	$	150
Member standby letters of credit	344		293		637		296		273		569
Housing authority standby bond purchase agreements	50		387		437		44		282		326
MPF Xtra mortgage purchase commitments which will be concurrently resold to Fannie Mae	748		—		748		250		—		250
MPF Loan mortgage purchase commitments for portfolio	3		—		3		1		—		1
Advance commitments	7		214		221		—		—		—
Total	$	4,078	$	894	$	4,972	$	741	$	555	$	1,296

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Transactions with Members and Other FHLBs

9 Months Ended

Sep. 30, 2012

Related Party Transactions [Abstract]

Related Party Transactions Disclosure [Text Block]

Transactions with Members and Other FHLBs

Related Parties

We are a member-owned cooperative. We define related parties as members that own 10% or more of our capital stock or members whose officers or directors also serve on our Board of Directors. Capital stock ownership is a prerequisite to transacting any member business with us. Members and former members own all of our capital stock.

We conduct our advances business almost exclusively with members. Therefore, in the normal course of business, we extend credit to members whose officers and directors may serve on our Board of Directors. We extend credit to members whose officers or directors may serve as our directors on market terms that are no more favorable to them than the terms of comparable transactions with other members who are not considered related parties. In addition, we may purchase short-term investments, Federal Funds, and MBS from members (or affiliates of members). All investments are market rate transactions and all MBS are purchased through securities brokers or dealers. Derivative transactions with members and affiliates are executed at market rates.

Members

The table below summarizes balances we had with our members as defined above as related parties (including their affiliates) as reported in the statements of condition as of the dates indicated. Members represented in these tables may change between periods presented, to the extent that our related parties change, based on changes in the composition of our Board membership.

	September 30, 2012		December 31, 2011
Assets - Advances	$	2,495	$	3,515
Liabilities - Deposits	97		69
Equity - Capital Stock	250		399

Other FHLBs

Material amounts of transactions with other FHLBs, if any, are parenthetically identified on the face of our Financial Statements.

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Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified			9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Accumulated Other Comprehensive Income (Loss) [Member]	Sep. 30, 2011 Accumulated Other Comprehensive Income (Loss) [Member]	Sep. 30, 2012 Net Unrealized on Cash Flow Hedges [Member]	Sep. 30, 2011 Net Unrealized on Cash Flow Hedges [Member]	Sep. 30, 2012 Post-Retirement Plans [Member]	Sep. 30, 2011 Post-Retirement Plans [Member]	Sep. 30, 2012 AFS Securities [Member] Net Unrealized Investment Gain (Loss) [Member]	Sep. 30, 2011 AFS Securities [Member] Net Unrealized Investment Gain (Loss) [Member]	Sep. 30, 2012 AFS Securities [Member] Non-credit OTTI [Member]	Sep. 30, 2011 AFS Securities [Member] Non-credit OTTI [Member]	Sep. 30, 2012 HTM Securities [Member] Net Unrealized Investment Gain (Loss) [Member]	Sep. 30, 2011 HTM Securities [Member] Net Unrealized Investment Gain (Loss) [Member]	Sep. 30, 2012 HTM Securities [Member] Non-credit OTTI [Member]	Sep. 30, 2011 HTM Securities [Member] Non-credit OTTI [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	$ 37	$ (431)	$ (431)	$ (483)	$ (1,049)	$ (561)	$ 2	$ 2	$ 1,113	$ 748	$ (26)	$ (34)	$ (5)	$ (8)	$ (466)	$ (630)
Net Change in the Period			468	110	(93)	(500)	(1)	0	477	468	15	8	2	3	68	131
Accumulated Other Comprehensive Income (Loss), Ending Balance	$ 37	$ (431)	$ 37	$ (373)	$ (1,142)	$ (1,061)	$ 1	$ 2	$ 1,590	$ 1,216	$ (11)	$ (26)	$ (3)	$ (5)	$ (398)	$ (499)

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Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Operating
Net cash provided by (used in) operating activities	$ 230		$ (700)
Investing
Net change Federal Funds sold	(998)		1,058
Net change securities purchased under agreements to resell	(2,224)		3,575
Advances -
Principal collected	154,336		71,676
Issued	(152,564)		(67,079)
MPF Loans held in portfolio -
Principal collected	2,841		3,066
Purchases	(54)		(40)
Trading securities -
Proceeds from maturities, sales, and paydowns	1,976		1,820
Purchases	(1,648)		(4,407)
Held-to-maturity securities -
Short-term held-to-maturity securities, net	266	[1]	467	[1]
Proceeds from maturities	1,542	[1]	1,785	[1]
Purchases	(19)	[1]	(1,042)	[1]
Available-for-sale securities -
Proceeds from maturities and sales	1,093		891
Purchases	0		(70)
Proceeds from sale of foreclosed assets	53		52
Capital expenditures for software and equipment	(6)		(4)
Net cash provided by (used in) investing activities	4,594		11,748
Financing
Net change deposits	82		(101)
Maturities of securities sold under agreements to repurchase	(400)		0
Net proceeds from issuance of consolidated obligations -
Discount notes	354,372		616,603
Bonds	37,532		30,246
Payments for maturing and retiring consolidated obligations -
Discount notes	(352,547)		(615,186)
Bonds	(44,082)		(42,572)
Net proceeds (payments) on derivative contracts with financing element	(61)		(100)
Proceeds from issuance of capital stock	144		61
Repurchase or redemption of capital stock	(790)		0
Redemptions of mandatory redeemable capital stock	(48)		(4)
Cash dividends paid	(3)		(2)
Net cash provided by (used in) financing activities	(5,801)		(11,055)
Net increase (decrease) in cash and due from banks	(977)		(7)
Cash and due from banks at beginning of year	1,002		282
Cash and due from banks at end of period	25		275
Supplemental
Capital stock reclassified to mandatorily redeemable capital stock	54		4
Transfer of MPF Loans to real estate owned	$ 76		$ 54

[1] a Short-term held-to-maturity securities, net consist of investment securities that have a maturity of less than 90 days when purchased. Proceeds from maturities and purchases consist of securities with maturities of 90 days or more.

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Statements of Condition (Parentheticals) (USD $) In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financial Instruments Owned and Pledged as Collateral [Line Items]
Trading Securities Pledged	$ 0	$ 15
Available-for-sale Securities Pledged	0	14
Held-to-maturity Securities Pledged	0	490
Advances Carried at Fair Value	9	9
Allowance for credit losses	(44)	(45)
Software and equipment, accumulated amortization/depreciation	(153)	(143)
Capital Stock Par Value	$ 100	$ 100
Subclass B-1 Shares Issued	1	0
Subclass B-2 Shares Issued	16	0
Subclass B-1 Shares Outstanding	1	0
Subclass B-2 Shares Outstanding	16	0
Shares Issued	17	24
Shares Outstanding	17	24
Fair Value of Held-to-Maturity Securities	10,690	12,131
Portion at Fair Value, Fair Value Disclosure [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Discount Notes Carried at Fair Value	2,258	11,466
Portion at Fair Value, Fair Value Disclosure [Member] | Consolidated Obligation Bonds [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Bonds Carried at Fair Value	$ 855	$ 2,631

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Consolidated Obligations

9 Months Ended

Sep. 30, 2012

Debt Disclosure [Abstract]

Consolidated Obligations [Text Block]

Consolidated Obligations

The following table presents our consolidated obligation bonds, for which we are the primary obligor, including callable bonds that are redeemable in whole, or in part, at our discretion on predetermined call dates.

As of September 30, 2012	Contractual Maturity		Weighted Average Interest Rate		Next Maturity or Call Date
Due in one year or less	$	7,646	3.37	%	$	19,153
One to two years	5,615		3.76	%	6,150
Two to three years	2,125		2.52	%	1,208
Three to four years	3,768		3.70	%	2,768
Four to five years	5,890		2.05	%	1,575
Thereafter	8,378		2.85	%	2,568
Total par value	$	33,422	3.06	%	$	33,422

The following table presents our consolidated obligation discount notes for which we are the primary obligor. All are due in one year or less.

	Carrying Value		Par Value		Weighted Average Interest Rate
As of September 30, 2012	$	27,231	$	27,235	0.13	%
As of December 31, 2011	25,404		25,411		0.05	%

The following table presents consolidated obligation bonds outstanding by call feature:

As of	September 30, 2012			December 31, 2011
Noncallable	$	20,759		$	24,479
Callable	12,663			15,485
Total par value	33,422			39,964
Bond premiums (discounts), net	14			19
Hedging adjustments	(70		)	(104		)
Fair value option adjustments	—			1
Total consolidated obligation bonds	$	33,366		$	39,880

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Document and Entity Information Document (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Oct. 31, 2012
Entity Information [Line Items]
Entity Registrant Name	Federal Home Loan Bank of Chicago
Entity Central Index Key	0001331451
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		17,206,500
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float	$ 0

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Subordinated Notes

9 Months Ended

Sep. 30, 2012

Subordinated Debt [Abstract]

Subordinated Notes [Text Block]

Subordinated Notes

Our subordinated notes outstanding mature on June 13, 2016. The subordinated notes are not obligations of, and are not guaranteed by, the United States government or any FHLBs other than us. The subordinated notes are unsecured obligations and rank junior in priority of payment to our senior liabilities. Senior liabilities include all of our existing and future liabilities, such as deposits, consolidated obligations for which we are the primary obligor and consolidated obligations of the other FHLBs for which we are jointly and severally liable. For further description of our subordinated notes see Note 15 - Subordinated Notes in our 2011 Form 10-K.

Prior to conversion to our new capital structure, we were allowed to include a percentage of the outstanding principal amount of the subordinated notes (the Designated Amount) in determining compliance with our regulatory capital and minimum regulatory leverage requirements, maximum permissible holdings of MBS and unsecured credit, subject to 20% annual phase-outs that commenced June 14, 2011. At December 31, 2011, the Designated Amount of subordinated notes was $800 million.

After converting our capital stock as of January 1, 2012, we no longer include the Designated Amount of subordinated notes in calculating our maximum permissible holdings of MBS and unsecured credit or in determining compliance with our minimum regulatory capital requirements now that we are subject to the post-conversion capital requirements discussed in Note 13 - Capital Stock and Mandatorily Redeemable Capital Stock (MRCS).

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Statements of Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Interest income	$ 466	$ 559	$ 1,476	$ 1,714
Interest expense	326	425	1,039	1,325
Net interest income before provision for credit losses	140	134	437	389
Provision for credit losses	0	3	8	12
Net interest income	140	131	429	377
Non-interest gain (loss) on -
Total other-than-temporary impairment	0	(7)	(2)	(16)
Net non-credit portion reclassified to (from) statements of comprehensive income	0	(7)	(13)	(41)
Net other-than-temporary impairment (OTTI) charges, credit portion	0	(14)	(15)	(57)
Trading securities	(10)	(18)	(35)	(40)
Derivatives and hedging activities	(1)	95	2	77
Instruments held under fair value option	(6)	0	2	(13)
Early extinguishment of debt	0	(21)	0	(21)
Other, net	5	19	13	25
Total non-interest gain (loss)	(12)	61	(33)	(29)
Non-interest expense -
Compensation and benefits	14	18	45	47
Other operating expenses	9	8	25	25
FHFA	2	2	6	8
Office of Finance	0	1	2	3
Other	3	7	12	18
Total non-interest expense	28	36	90	101
Income before assessments	100	156	306	247
Assessments -
Affordable Housing Program	10	15	31	22
Resolution Funding Corporation	0	0	0	17
Total assessments	10	15	31	39
Net Income	$ 90	$ 141	$ 275	$ 208

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Investment Securities

9 Months Ended

Sep. 30, 2012

Investments, Debt and Equity Securities [Abstract]

Marketable Securities [Text Block]

Investment Securities

Our major security types presented in the tables below are defined as follows:

• U.S. Government & other government related consists of the sovereign debt of the United States; debt issued by Fannie Mae, Freddie Mac, and the Federal Farm Credit Banks Funding Corporation; and non mortgage-backed securities of the Small Business Administration, Federal Deposit Insurance Corporation (FDIC), and Tennessee Valley Authority.

• Federal Family Education Loan Program - asset backed securities (FFELP ABS)

• Government Sponsored Enterprises (GSE) residential consists of mortgage-backed securities (MBS) issued by Fannie Mae and Freddie Mac.

• Government-guaranteed residential consists of MBS issued by Ginnie Mae.

• Private-label residential MBS

Gains and losses on sales of securities are determined using the specific identification method and are included in non-interest gain (loss) on the statements of income.

Pledged Collateral

We enter into bilateral collateral agreements and execute derivatives and other transactions with major banks and broker-dealers, and we may pledge investment securities as collateral under these agreements as noted on the face of the Statements of Condition. See Note 9 - Derivatives and Hedging Activities for further details.

Trading Securities

The following table presents the fair value of our trading securities:

As of	September 30, 2012		December 31, 2011
U.S. Government & other government related	$	2,545	$	2,737
MBS:
GSE residential	137		195
Government-guaranteed residential	3		3
Total MBS	140		198
Total trading securities	$	2,685	$	2,935

At September 30, 2012, and 2011, we had net year-to-date unrealized gains (losses) of $(35) million and $(39) million on trading securities still held at period end.

Amortized Cost Basis and Fair Value – Available-for-Sale Securities (AFS)

	Amortized Cost Basis		Non-Credit  OTTI Recognized  in AOCI (Loss)			Gross Unrealized Gains in AOCI		Gross Unrealized Losses in AOCI			Fair Value
As of September 30, 2012
U.S. Government & other government related	$	713	$	—		$	63	$	—		$	776
FFELP ABS	7,176		—			525		(14		)	7,687
MBS:
GSE residential	11,494		—			897		(65		)	12,326
Government-guaranteed residential	2,786		—			185		—			2,971
Private-label residential	81		(11		)	—		(1		)	69
Total MBS	14,361		(11		)	1,082		(66		)	15,366
Total	$	22,250	$	(11	)	$	1,670	$	(80	)	$	23,829
As of December 31, 2011
U.S. Government & other government related	$	947	$	—		$	56	$	(2	)	$	1,001
FFELP ABS	7,796		—			398		(35		)	8,159
MBS:
GSE residential	11,565		—			658		(91		)	12,132
Government-guaranteed residential	2,831		—			130		—			2,961
Private-label residential	90		(26		)	—		(1		)	63
Total MBS	14,486		(26		)	788		(92		)	15,156
Total	$	23,229	$	(26	)	$	1,242	$	(129	)	$	24,316

Amortized Cost, Carrying Value, and Fair Value - Held-to-Maturity Securities (HTM)

	Amortized Cost Basis		Non-credit OTTI Recognized  in AOCI (Loss)			Carrying Value		Gross Unrecognized Holding  Gains		Gross Unrecognized Holding  Losses			Fair  Value
As of September 30, 2012
U.S. Government & other government related	$	2,252	$	—		$	2,252	$	139	$	—		$	2,391
State or local housing agency	25		—			25		—		—			25
MBS:
GSE residential	4,653		—			4,653		422		—			5,075
Government-guaranteed residential	1,353		—			1,353		53		—			1,406
Private-label residential	1,905		(398		)	1,507		295		(9		)	1,793
Total MBS	7,911		(398		)	7,513		770		(9		)	8,274
Total	$	10,188	$	(398	)	$	9,790	$	909	$	(9	)	$	10,690
As of December 31, 2011
U.S. Government & other government related	$	2,573	$	—		$	2,573	$	104	$	—		$	2,677
State or local housing agency	27		—			27		—		—			27
MBS:
GSE residential	5,761		—			5,761		423		—			6,184
Government-guaranteed residential	1,414		—			1,414		34		—			1,448
Private-label residential	2,168		(466		)	1,702		145		(52		)	1,795
Total MBS	9,343		(466		)	8,877		602		(52		)	9,427
Total	$	11,943	$	(466	)	$	11,477	$	706	$	(52	)	$	12,131

Aging of Unrealized Temporary Losses

The following tables present unrealized temporary losses on our AFS and HTM portfolio for periods less than 12 months and for 12 months or more. We recognized no OTTI charges on these unrealized loss positions because we expect to recover the entire amortized cost basis, we do not intend to sell these securities, and we believe it is more likely than not that we will not be required to sell them prior to recovering their amortized cost basis. In the tables below, in cases where the fair value or gross unrealized losses for an investment category is insignificant, we don't report a balance.

Available-for-Sale Securities

	Less than 12 Months					12 Months or More						Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses				Fair Value		Gross Unrealized Losses
As of September 30, 2012
U.S. Government & other government related	$	—	$	—		$	49	$	—			$	49	$	—
FFELP ABS	—		—			1,123		(14		)		1,123		(14		)
MBS:
GSE residential	—		—			3,685		(65		)		3,685		(65		)
Private-label residential	—		—			69		(12		)	a	69		(12		)	a
Total MBS	—		—			3,754		(77		)		3,754		(77		)
Total available-for-sale securities	$	—	$	—		$	4,926	$	(91	)		$	4,926	$	(91	)
As of December 31, 2011
U.S. Government & other government related	$	98	$	(2	)	$	—	$	—			$	98	$	(2	)
FFELP ABS	223		(3		)	1,203		(32		)		1,426		(35		)
MBS:
GSE residential	4,073		(91		)	—		—				4,073		(91		)
Government-guaranteed residential	33		—			80		—				113		—
Private-label residential	—		—			63		(27		)	a	63		(27		)	a
Total MBS	4,106		(91		)	143		(27		)		4,249		(118		)
Total available-for-sale securities	$	4,427	$	(96	)	$	1,346	$	(59	)		$	5,773	$	(155	)

^a  Includes $36 million and $28 million of gross unrealized/unrecognized recoveries in fair value at September 30, 2012, and at December 31, 2011.

Held-to-Maturity Securities

	Less than 12 Months				12 Months or More					Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
As of September 30, 2012
MBS:
Private-label residential	$	—	$	—	$	1,645	$	(407	)	$	1,645	$	(407	)
Total MBS	—		—		1,645		(407		)	1,645		(407		)
Total held-to-maturity securities	$	—	$	—	$	1,645	$	(407	)	$	1,645	$	(407	)
As of December 31, 2011
U.S. Government & other government related	$	7	$	—	$	—	$	—		$	7	$	—
MBS:
GSE residential	—		—		37		—			37		—
Private-label residential	—		—		1,653		(518		)	1,653		(518		)
Total MBS	—		—		1,690		(518		)	1,690		(518		)
Total held-to-maturity securities	$	7	$	—	$	1,690	$	(518	)	$	1,697	$	(518	)

Contractual Maturity Terms

The table below presents the amortized cost basis and fair value of AFS and HTM securities by contractual maturity, excluding ABS and MBS securities. These securities are excluded because their expected maturities may differ from their contractual maturities if borrowers of the underlying loans elect to prepay their loans.

	Available-for-Sale				Held-to-Maturity
As of September 30, 2012	Amortized Cost		Fair  Value		Carrying Value		Fair  Value
Year of Maturity -
Due in one year or less	$	—	$	—	$	506	$	509
Due after one year through five years	113		122		58		59
Due after five years through ten years	105		114		493		520
Due after ten years	495		540		1,220		1,328
Total non-ABS/MBS	713		776		2,277		2,416
ABS and MBS	21,537		23,053		7,513		8,274
Total securities	$	22,250	$	23,829	$	9,790	$	10,690

Other-Than-Temporary Impairment

We recognized credit losses into earnings on securities in an unrealized loss position for which we do not expect to recover the entire amortized cost basis. Non-credit losses are recognized in AOCI since we do not intend to sell these securities and we believe it is more likely than not that we will not be required to sell any investment security before the recovery of its amortized cost basis. The non-credit loss in AOCI on HTM securities will be accreted back into the HTM securities over their remaining lives as an increase to the carrying value, since we ultimately expect to collect these amounts. See Statements of Comprehensive Income on page 5.

Significant Inputs Used on OTTI Securities

Our OTTI analysis of our private-label MBS includes key modeling assumptions, significant inputs, and methodologies provided by an FHLB System OTTI Committee. We use the information provided to generate cash flow projections used in analyzing credit losses and determining OTTI for private-label MBS. The OTTI Committee was formed by the FHLBs to achieve consistency among the FHLBs in their analyses of the OTTI of private-label MBS. We are responsible for making our own determination of impairment, which includes determining the reasonableness of assumptions, significant inputs, and methodologies used, and performing the required present value calculations using appropriate historical cost bases and yields. 

In cases where the fair value of a private-label MBS is less than its amortized cost basis at the balance sheet date, we assess whether its entire amortized cost basis will be recovered. Specifically, we perform a cash flow analysis for substantially all of these securities that utilizes two models provided by independent third parties.

The first model considers borrower characteristics and the particular attributes of the loans underlying the securities, in conjunction with assumptions about future changes in home prices and interest rates, prepayment rates, default rates, and loss severities. A significant input to the first model is the forecast of future housing price changes for the relevant states and core based statistical areas (CBSAs), which are based upon an assessment of the individual housing markets. CBSA refers collectively to metropolitan and micropolitan statistical areas as defined by the United States Office of Management and Budget; as currently defined, a CBSA must contain at least one urban area with a population of 10,000 or more people.

The second model uses the month-by-month projections of future loan performance derived from the first model and allocates the projected loan level cash flows and losses to the various security classes in the securitization structure in accordance with its prescribed cash flow and loss allocation rules.

Our housing price forecast as of September 30, 2012 assumed current-to-trough home price declines ranging from 0.0% (for those housing markets that are believed to have reached their trough) to 4.0%. For those markets where further home price declines are anticipated, the declines were projected to occur over the 3- to 9-month period beginning July 1, 2012. From the trough, home prices were projected to recover using one of five different recovery paths that vary by housing market. For the vast majority of markets for which further home price declines are anticipated, the declines were projected to range from 1% to 2% over the 3-month period beginning July 1, 2012.

The following table presents the projected home price recovery by future month.

As of September 30, 2012	Recovery Range Annualized %
Months	Low	High
1-6	0.0%	2.8%
7-18	0.0%	3.0%
19-24	1.0%	4.0%
25-30	2.0%	4.0%
31-42	2.0%	5.0%
43-66	2.0%	6.0%
Thereafter	2.3%	5.6%

The table below presents the inputs we used to measure the amount of the credit loss recognized in earnings during the current period attributable to OTTI securities. The model used to estimate cash flows classifies the OTTI securities as either prime, Alt-A, or subprime based on an assessment as of the current period rather than the classification at the time of issuance.

			Prepayment Rates			Default Rates			Loss Severities			Credit Enhancement
			%	Range %		%	Range %		%	Range %		%	Range %
As of September 30, 2012	Unpaid Principal Balance		Weighted Average	Low	High	Weighted Average	Low	High	Weighted Average	Low	High	Weighted Average	Low	High
2006 Prime	$	103	8.4	8.1	9.3	36.6	27.4	40.6	42.3	40.0	43.3	3.2	1.9	6.3
2006 Subprime	15		2.8	2.0	3.6	79.8	71.5	87.5	74.2	69.3	78.7	1.3	—	2.5
Total	$	118	7.7	2.0	9.3	42.2	27.4	87.5	46.4	40.0	78.7	3.0	—	6.3

In the following two tables, we classify our private-label MBS as prime, subprime, or Alt-A based upon the nature of the majority of underlying mortgages collateralizing each security based on the issuer's classification, or as published by a nationally recognized statistical rating organization (NRSRO), at the time of issuance of the MBS.  On October 15, 2010, we instituted litigation relating to sixty-four private label MBS bonds purchased by us in an aggregate original principal amount of approximately $4.29 billion. Our complaints assert claims for untrue or misleading statements in the sale of securities, and it is possible that the classifications of private-label MBS, as well as other statements made about the securities by the issuer, are inaccurate. 

The following table presents the current outstanding balances on private-label MBS that were other-than-temporarily impaired at some point during the life of the securities. This table does not include HTM and AFS securities that are in an unrealized loss position, which have not had an OTTI charge during the life of the security.

As of September 30, 2012	Unpaid Principal Balance		Amortized Cost Basis		Carrying Value		Fair Value
Private-label residential MBS:
Alt-A	$	124	$	79	$	68	$	68
Total OTTI AFS securities	$	124	$	79	$	68	$	68
Private-label residential MBS:
Prime	$	1,419	$	1,098	$	818	$	1,024
Subprime	842		547		429		509
Total OTTI HTM securities	$	2,261	$	1,645	$	1,247	$	1,533

We recognized OTTI as presented in the following table. Net non-credit portion reclassified (from) to AOCI represents the net amount of impairment losses recognized into earnings from AOCI or reclassified to AOCI from earnings.

	Total OTTI			Net Non-credit Portion (from) to AOCI			OTTI Credit Portion
Three months ended September 30, 2012
Total OTTI	$	—		$	—		$	—
Three months ended September 30, 2011
Prime	$	—		$	(11	)	$	(11	)
Subprime	(7		)	4			(3		)
Total OTTI	$	(7	)	$	(7	)	$	(14	)
Nine months ended September 30, 2012
Prime	$	—		$	(14	)	$	(14	)
Subprime	(2		)	1			(1		)
Total OTTI	$	(2	)	$	(13	)	$	(15	)
Nine months ended September 30, 2011
Prime	$	—		$	(35	)	$	(35	)
Alt-A	—			(6		)	(6		)
Subprime	(16		)	—			(16		)
Total OTTI	$	(16	)	$	(41	)	$	(57	)

The following table presents the changes in the cumulative amount of credit losses (recognized into earnings) on OTTI investment securities for the periods stated.

Three months ended September 30,	2012			2011
Beginning Balance	$	724		$	694
Additions:
Additional credit losses on securities for which an OTTI charge was previously recognized	—			14
Total OTTI credit losses recognized in the period	—			14
Reductions:
Securities sold, matured, paid down, or prepaid over the period	—			(1		)
Increases in cash flows expected to be collected that have been recognized into net income	(1		)	—
Ending Balance	$	723		$	707
Nine months ended September 30,
Beginning Balance	$	712		$	653
Additions:
Additional credit losses on securities for which an OTTI charge was previously recognized	15			57
Total OTTI credit losses recognized in the period	15			57
Reductions:
Securities sold, matured, paid down, or prepaid over the period	—			(1		)
Increases in cash flows expected to be collected that have been recognized into net income	(4		)	(2		)
Ending Balance	$	723		$	707

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Interest Income and Interest Expense

9 Months Ended

Sep. 30, 2012

Interest Income and Interest Expense [Abstract]

Interest Income and Interest Expense Disclosure [Text Block]

Interest Income and Interest Expense

The following table presents interest income and interest expense for the periods indicated:

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Interest income -
Federal Funds sold	$	1		$	1		$	2		$	3
Securities purchased under agreements to resell	1			—			3			4
Interest bearing deposits	—			—			1			—
Investment securities -
Trading	12			22			43			53
Available-for-sale	160			162			486			489
Held-to-maturity	102			125			326			390
Total investment securities	274			309			855			932
Advances	46			53			140			183
Advance prepayment fees, net of fair value hedge adjustments of    $(0), $(43), $(24), and $(50)	19			15			54			20
Total Advances	65			68			194			203
MPF Loans held in portfolio	127			183			429			578
Less: Credit enhancement fees	(2		)	(2		)	(8		)	(6		)
MPF Loans held in portfolio, net	125			181			421			572
Total interest income	466			559			1,476			1,714
Interest expense -
Securities sold under agreements to repurchase	—			4			—			13
Consolidated obligations -
Discount notes	77			88			230			278
Bonds	235			318			766			991
Total consolidated obligations	312			406			996			1,269
Subordinated notes	14			15			43			43
Total interest expense	326			425			1,039			1,325
Net interest income before provision for credit losses	140			134			437			389
Provision for credit losses	—			3			8			12
Net interest income	$	140		$	131		$	429		$	377

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2012

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies [Text Block]

Commitments and Contingencies

The following table shows our commitments outstanding but not yet incurred or recorded in our statements of condition.

As of	September 30, 2012						December 31, 2011
	Expire within one year		Expire after one year		Total		Expire within one year		Expire after one year		Total
Unsettled consolidated obligation bonds	$	2,926	$	—	$	2,926	$	150	$	—	$	150
Member standby letters of credit	344		293		637		296		273		569
Housing authority standby bond purchase agreements	50		387		437		44		282		326
MPF Xtra mortgage purchase commitments which will be concurrently resold to Fannie Mae	748		—		748		250		—		250
MPF Loan mortgage purchase commitments for portfolio	3		—		3		1		—		1
Advance commitments	7		214		221		—		—		—
Total	$	4,078	$	894	$	4,972	$	741	$	555	$	1,296

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Regulatory Actions

9 Months Ended

Sep. 30, 2012

Regulatory Actions [Abstract]

Regulatory Actions [Text Block]

Regulatory Actions

On April 18, 2012, the FHFA terminated the Consent Order to Cease and Desist (the C&D Order) that we entered into with the Federal Housing Finance Board in October 2007. The C&D Order placed several requirements on us, including among other things, restrictions on the repurchase and redemption of capital stock, prior approval of dividend declarations and submission of a revised Capital Plan, as further described in Note 16 - Regulatory Actions in our 2011 Form 10-K.

In connection with operating the Bank after termination of the C&D Order, our Board of Directors adopted a resolution on March 30, 2012, which included the following:

• As required by the FHFA in connection with the approval of our Capital Plan, we will continue to obtain FHFA approval for any new investments that have a term to maturity in excess of 270 days until such time as our MBS portfolio is less than three times our total regulatory capital and our advances represent more than 50% of our total assets.

• In addition to the requirements to declare and pay dividends in accordance with our Retained Earnings and Dividend Policy, dividends paid on either Class B-1 stock or Class B-2 stock in any given quarter must not exceed the average of three-month LIBOR for that quarter on an annualized basis. We may, with approval of the Board, request approval from the FHFA to pay dividends in excess of this limit in advance of a coming calendar year.

• We must maintain retained earnings at a level equal to a “floor” amount, which is the greater of our retained earnings as of each immediately preceding year-end or $1.321 billion, and will not pay a dividend without prior written approval by the FHFA if the payment of such dividend would cause our retained earnings to be reduced below the “floor” amount. Our retained earnings at December 31, 2011, were $1.321 billion.

• We will continue to execute and comply with our plan to repurchase excess capital stock of members over a period of time (Repurchase Plan) as approved by the FHFA in December 2011. Once the Repurchase Plan terminates, we will continue to repurchase excess capital stock held by members on a quarterly basis but only if we maintain compliance with the financial and capital thresholds set forth in the Repurchase Plan, as previously disclosed in Note 17 - Capital Stock and Mandatorily Redeemable Capital Stock (MRCS) in our 2011 Form 10-K.

Our Board may not modify or terminate this resolution without written consent by the Director of the FHFA.

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Allowance for Credit Losses

9 Months Ended

Sep. 30, 2012

Allowance for Credit Losses [Abstract]

Allowance for Credit Losses [Text Block]

Allowance for Credit Losses

We have established an allowance methodology for each of our portfolio segments:

•credit products (advances, letters of credit and other extensions of credit to borrowers);

•conventional MPF Loans held for portfolio;

•government MPF Loans held for portfolio; and

•term Federal Funds sold and term securities purchased under agreements to resell.

For detailed information on these methodologies and our accounting policies please see Note 9 - Allowance for Credit Losses in our 2011 Form 10-K.

Credit Products

For the periods presented, we had no credit products that were past due, on nonaccrual status, or considered impaired. In addition, there have been no troubled debt restructurings related to our credit products during the periods then ended. Based upon the collateral we held as security, our credit extension and collateral policies, our credit analysis and the repayment history on credit products, we do not believe that any credit losses have been incurred on our credit products; accordingly, we have not recorded any allowance for credit losses for our credit products. Additionally, no liability was recorded to reflect an allowance for credit losses for our credit products with off-balance sheet credit exposures.

Conventional MPF Loans

MPF Risk Sharing Structure

For a definition of MPF Risk Sharing Structure see page F-36 in our 2011 Form 10-K. We share the risk of credit losses on conventional MPF Loan products with our PFIs (excluding the MPF Xtra product) by structuring potential losses on conventional MPF Loans into layers with respect to each master commitment (MC). We require that conventional MPF Loans held in our portfolio be credit enhanced at inception so that our risk of loss is limited to be equivalent to the losses of an investor in an AA rated mortgage backed security. As a part of our methodology to determine the amount of credit enhancement necessary, we analyze the risk characteristics of each MPF Loan using a model licensed from an NRSRO. We use the model to evaluate loan data provided by the PFI as well as other relevant information.

The table below presents the impact of the MPF Risk Sharing Structure and severity rates on our allowance for credit losses. As of September 30, 2012, our Total Severity Rate for the MPF Risk Sharing Structure was 38.0%, which included a weighted average Credit Loss Severity Rate of 22.0% attributable to the MPF Loan pool and impaired collateral dependent MPF Loans. Comparable rates at December 31, 2011, were 35.0% and 19.3%. For detailed definitions of how Total Severity Rate and Credit Loss Severity Rate are calculated, see Loss Severity on page F-38 in our 2011 Form 10-K.

As of	September 30, 2012			December 31, 2011
Total estimated losses outstanding	$	91		$	97
Less: losses expected to be absorbed by MPF Risk Sharing Structure	(23		)	(23		)
Our share of total losses	68			74
Less: non-credit losses a	(29		)	(34		)
Credit losses	39			40
Plus: other estimated credit losses in the remaining portfolio	5			5
Allowance for credit losses on conventional MPF Loans	$	44		$	45

^a  Non-credit losses represent period costs on Real Estate Owned (REO), for example, real estate taxes and maintenance costs and the economic loss of interest income that was contractually due but which was not recognized in our financial statements as the impaired MPF Loans were placed on nonaccrual status.

The following table presents the changes in the allowance for credit losses on conventional MPF Loans and the recorded investment by impairment methodology.

	September 30, 2012			September 30, 2011
For the three months ended
Allowance for credit losses on conventional MPF Loans-
Balance, beginning of period	$	48		$	39
Losses charged to the allowance	(4		)	(1		)
Provision for credit losses	—			3
Balance, end of period	$	44		$	41
For the nine months ended
Allowance for credit losses on conventional MPF Loans-
Balance, beginning of period	$	45		$	33
Losses charged to the allowance	(9		)	(4		)
Provision for credit losses	8			12
Balance, end of period	$	44		$	41
As of	September 30, 2012			December 31, 2011
Allowance assigned to conventional MPF Loans-
Specifically identified and individually evaluated for impairment	$	31		$	26
Homogeneous pools of loans and collectively evaluated for impairment	13			19
Total	$	44		$	45
Recorded Investment in Conventional MPF Loans-
Individually evaluated for impairment - with an allowance	$	223		$	204
Collectively evaluated for impairment	8,910			11,470
Total	$	9,133		$	11,674

Government MPF Loans Held for Portfolio

We invest in fixed-rate government MPF Loans which are insured or guaranteed by the Federal Housing Administration (FHA), the Department of Veterans Affairs (VA), the Rural Housing Service of the Department of Agriculture (RHS), and/or by the Department of Housing and Urban Development (HUD). The PFI provides and maintains insurance or a guaranty from these agencies. The PFI is responsible for compliance with all government agency requirements and for obtaining the benefit of the applicable insurance or guaranty with respect to defaulted government MPF Loans. Any losses incurred on such loans that are not recovered from the issuer or guarantor, are absorbed by the servicing PFIs. Therefore, we only have credit risk for these loans if the servicing PFI fails to pay for losses not covered by FHA or HUD insurance, or VA or RHS guarantees. In this regard, based on our assessment of our servicing PFIs, we did not establish an allowance for credit losses for our government MPF Loan portfolio as of the periods presented. Further, due to the government guarantee or insurance, these loans are not placed on nonaccrual status.

Credit Quality Indicators - MPF Loans

The table below summarizes our recorded investment in MPF Loans by our key credit quality indicators.

	September 30, 2012									December 31, 2011
As of	Conventional			Government			Total			Conventional			Government			Total
Past due 30-59 days	$	178		$	123		$	301		$	222		$	161		$	383
Past due 60-89 days	58			42			100			74			55			129
Past due 90 days or more	265			224			489			303			248			551
Total past due	501			389			890			599			464			1,063
Total current	8,632			1,846			10,478			11,075			2,097			13,172
Total recorded investment	$	9,133		$	2,235		$	11,368		$	11,674		$	2,561		$	14,235
In process of foreclosure	$	159		$	85		$	244		$	193		$	63		$	256
Serious delinquency rate a	2.91		%	10.06		%	4.32		%	2.62		%	9.69		%	3.89		%
Past due 90 days or more still accruing interest b	$	79		$	225		$	304		$	128		$	248		$	376
On nonaccrual status	$	228		$	—		$	228		$	211		$	—		$	211

^a  MPF Loans that are 90 days or more past due or in the process of foreclosure as a percentage of the total recorded investment.

^b  Consists of MPF Loans that are either government mortgage loans or conventional mortgage loans that are well secured (by collateral that have a realizable value sufficient to discharge the debt or by the guarantee or insurance, such as PMI, of a financially responsible party) and in the process of collection.

Troubled Debt Restructurings

We consider a troubled debt restructuring to have occurred when we grant a concession to a borrower that we would not otherwise consider for economic or legal reasons related to the borrower's financial difficulties.  An MPF Loan involved in our troubled debt restructuring program is individually evaluated for impairment when determining its related allowance for credit losses.  Credit loss is measured by factoring in expected cash shortfalls (i.e., loss severity rate) incurred as of the reporting date as well as the economic loss attributable to delaying the original contractual principal and interest due dates.

In the event a borrower qualifies for a troubled debt restructuring under our program, we typically modify the borrower's monthly payment for a period of up to 36 months to try to achieve a target housing expense ratio of not more than 31% of their monthly qualifying income.   Any and all delinquent interest on the loan may be capitalized as long as the resulting principal balance does not exceed the original principal balance, otherwise all delinquent interest is written off.  Next, we re-amortize the new outstanding balance to reflect a principal and interest payment for a term not to exceed 40 years and attempt to achieve the target housing expense ratio. This results in a balloon payment at the original maturity date of the loan as the maturity date and number of remaining monthly payments are not adjusted.  If the target housing expense ratio is still not met, we reduce the interest rate in 0.125% increments below the original note rate, to a floor rate of 3.00% for up to 36 months, in an effort to further reduce principal and interest payments again, until the target housing expense ratio is met.

Our recorded investment in troubled debt restructurings on our conventional MPF Loans that occurred during the three and nine months ended September 30, 2012, was $2 million and $7 million, and during the three and nine months ended September 30, 2011, was $2 million and $5 million. These amounts represent both the pre- and post- modification amounts recorded in our statement of condition as of the date the troubled debt restructurings were consummated. The pre- and post- modification amounts are the same as we did not record any write-offs either due to the forgiveness of principal or a direct write-off due to a confirmed loss.

Troubled debt restructurings that were modified during the previous 12 months that subsequently defaulted during the nine months ended September 30, 2012, were $8 million. A borrower is considered to have defaulted on a troubled debt restructuring if their contractually due principal or interest payment is sixty days past due at any time during the past 12 months. In certain cases, these troubled debt restructurings may have subsequently become current.

Individually Evaluated Impaired Loans

The following table summarizes the recorded investment, unpaid principal balance, and related allowance of impaired MPF Loans individually assessed for impairment, which includes impaired collateral dependent MPF Loans and troubled debt restructurings. We had no impaired MPF Loans without an allowance for either date.

	September 30, 2012						December 31, 2011
As of	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
Impaired conventional MPF Loans with an allowance	$	223	$	221	$	31	$	204	$	202	$	26

The following table summarizes the average recorded investment of impaired MPF Loans and related interest recognized.

	September 30, 2012				September 30, 2011
For the periods ended	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Three months	$	210	$	3	$	138	$	2
Nine months	207		7		136		5

Real Estate Owned

We had $60 million and $46 million in REO, recorded in other assets, at September 30, 2012, and December 31, 2011.

Term Federal Funds Sold and Term Securities Purchased Under Agreements to Resell

These financing receivables are short-term and the recorded balance approximates fair value. All federal funds sold were repaid according to the contractual terms. Federal Funds are only evaluated for purposes of an allowance for credit losses if the investment is not paid when due.

Securities purchased under agreements to resell are considered collateralized financing arrangements and effectively represent short-term loans with highly rated counterparties. The terms of these loans are structured such that if the market values of the underlying securities decrease below the market value required as collateral, the counterparty must place an equivalent amount of additional securities as collateral or remit an equivalent amount of cash, or the dollar value of the resale agreement will be decreased accordingly. If an agreement to resell is deemed to be impaired, the difference between the fair value of the collateral and the amortized cost of the agreement is charged to earnings. Based upon the collateral held as security, we have determined that no allowance for credit losses was needed for our securities purchased under agreements to resell. All securities purchased under agreements to resell were repaid according to the contractual terms.

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Derivatives and Hedging Activities (Derivatives in Statement of Condition) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives Designated as Hedging Instruments	$ 25,509		$ 28,610
Derivative Assets Designated as Hedging Instruments	132		235
Derivative Liabilities Designated as Hedging Instruments	2,233		2,099
Notional Amount of Derivativs Not Designated ad Hedging Instruments	27,591		45,394
Derivativs Assets Not Designated as Hedging Instruments	1,172		1,364
Derivativs Liabilities Not Designated as Hedging Instruments	716		789
Notional Amount of Derivatives	53,100		74,004
Derivative Assets, Before Netting and Collateral Adjustments	1,304		1,599
Derivative Liabilities, Before Netting and Collateral Adjustments	2,949		2,888
Derivative Assets, Exposure at fair value	90	[1]	138	[1]
Derivative Liabilities, Exposure at fair value	1,735	[1]	1,427	[1]
Derivative assets	55		40
Derivative liabilities	119		206
Net accrued interest receivable	127		153
Netting Adjustment [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Netting and Collateral	1,214	[2]	1,461	[2]
Derivative Liability, Netting and Collateral Adjustments	1,214	[2]	1,461	[2]
Cash Collateral and Related Accrued Interest [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Netting and Collateral	(35)		(98)
Derivative Liability, Netting and Collateral Adjustments	(1,616)		(1,221)
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives Designated as Hedging Instruments	25,509		28,240
Derivative Assets Designated as Hedging Instruments	132		203
Derivative Liabilities Designated as Hedging Instruments	2,233		2,099
Notional Amount of Derivativs Not Designated ad Hedging Instruments	17,889		38,159
Derivativs Assets Not Designated as Hedging Instruments	740		927
Derivativs Liabilities Not Designated as Hedging Instruments	691		785
Interest Rate Swaption [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives Designated as Hedging Instruments	0		370
Derivative Assets Designated as Hedging Instruments	0		32
Derivative Liabilities Designated as Hedging Instruments	0		0
Notional Amount of Derivativs Not Designated ad Hedging Instruments	6,290		4,820
Derivativs Assets Not Designated as Hedging Instruments	164		179
Derivativs Liabilities Not Designated as Hedging Instruments	0		0
Interest Rate Caps or Floors [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivativs Not Designated ad Hedging Instruments	1,913		1,913
Derivativs Assets Not Designated as Hedging Instruments	243		254
Derivativs Liabilities Not Designated as Hedging Instruments	0		0
Mortgage Delivery Commitments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivativs Not Designated ad Hedging Instruments	1,499		502
Derivativs Assets Not Designated as Hedging Instruments	25		4
Derivativs Liabilities Not Designated as Hedging Instruments	25		4
Derivative Financial Instruments, Assets [Member]
Derivatives, Fair Value [Line Items]
Net accrued interest receivable	$ 3		$ 13

[1] Includes net accrued interest receivable of $3 million as of September 30, 2012, and $13 million as of December 31, 2011.

[2] Amounts represent the effect of legally enforceable master netting agreements that allow us to settle positive and negative positions.

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Advances

9 Months Ended

Sep. 30, 2012

Advances [Abstract]

Advances [Text Block]

Advances

We offer a wide range of fixed- and variable-rate advance products with different maturities, interest rates, payment characteristics and optionality. The following table presents our advances by callable/putable features:

As of	September 30, 2012		December 31, 2011
Noncallable/nonputable	$	10,357	$	11,456
Callable	771		806
Putable	2,190		2,828
Total par value	13,318		15,090
Hedging adjustments	185		189
Other adjustments	28		12
Total advances	$	13,531	$	15,291

The following table presents our advances by redemption terms:

As of September 30, 2012	Amount		Weighted Average Interest Rate			Next Maturity or Call Date		Next Maturity or Put Date
Due in one year or less	$	4,211	0.99	%		$	4,966	$	6,364
One to two years	1,054		2.44	%		960		1,046
Two to three years	1,016		1.86	%	a	966		1,009
Three to four years	1,504		3.25	%		1,254		741
Four to five years	1,280		3.15	%		1,080		847
More than five years	4,253		1.45	%	a	4,092		3,311
Total par value	$	13,318	1.78	%		$	13,318	$	13,318

^a  Weighted average interest rate is due to the inclusion of significant variable-rate advances.

Advances Concentration

As of September 30, 2012, the following advance borrowers exceeded 10% of our total advances outstanding: BMO Harris Bank National Association with $2.4 billion or 18% and State Farm Bank, F.S.B with $1.7 billion or 13%.

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MPF Loans

9 Months Ended

Sep. 30, 2012

Mortgage Loans on Real Estate [Abstract]

MPF Loans [Text Block]

MPF Loans

We developed the MPF Program to allow us to invest in mortgages to help fulfill our housing mission and provide an additional source of liquidity to our members. The MPF Program is a secondary mortgage market structure under which we acquired and funded eligible mortgage loans from or through PFIs, and in some cases we purchased participations in pools of eligible mortgage loans from other FHLBs (MPF Banks). MPF Loans are defined as conforming conventional and Government fixed-rate mortgage loans secured by one-to-four family residential properties with maturities ranging from 5 years to 30 years or participations in such mortgage loans.

The following table presents information on MPF Loans held in our portfolio by contractual maturity at time of purchase. All are fixed-rate. Government is comprised of loans insured by the Federal Housing Administration (FHA) or the Department of Housing and Urban Development (HUD) and loans guaranteed by the Department of Veteran Affairs (VA) or Department of Agriculture Rural Housing Service (RHS). MPF Loans outstanding continue to decrease as a result of our ongoing strategy to not add MPF Loans to our balance sheet, except for loans being acquired under our affordable housing programs.

As of	September 30, 2012			December 31, 2011
Medium term (15 years or less)	$	2,827		$	3,810
Long term (greater than 15 years)	8,335			10,155
Total unpaid principal balance	11,162			13,965
Net premiums, credit enhancement and deferred loan fees	41			53
Hedging adjustments	107			145
Total before allowance for credit losses	11,310			14,163
Allowance for credit losses	(44		)	(45		)
Total MPF Loans held in portfolio, net	$	11,266		$	14,118
Conventional	$	8,954		$	11,433
Government	2,208			2,532
Total unpaid principal balance	$	11,162		$	13,965

See Note 8 - Allowance for Credit Lossesfor information related to our credit risk on MPF Loans and allowance for credit losses methodology.

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Derivatives and Hedging Activities

9 Months Ended

Sep. 30, 2012

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives and Hedging Activities [Text Block]

Derivatives and Hedging Activities

Refer to Note 2 - Summary of Significant Accounting Polices in our 2011 Form 10-K for our accounting policies for derivatives. Subsequent to the filing of that 10-K, we have added forward starting advances, which lock in the current market interest rate for future settlement of the advance. We may hedge a firm commitment for a forward-starting advance through the use of an interest rate swap. In this case, the swap will function as the hedging instrument for both the firm commitment and the subsequent advance. The carrying value of the firm commitment will be included in the basis of the advance at the time the commitment is terminated and the advance is issued. The basis adjustment will then be amortized into interest income over the life of the advance.

Managing Credit Risk on Derivative Agreements

We are subject to credit risk due to the risk of nonperformance by counterparties to our derivative agreements. The degree of counterparty risk depends on the extent to which master netting arrangements are included in such contracts to mitigate the risk. We manage counterparty credit risk through credit analysis, collateral requirements and adherence to the requirements set forth in our policies and FHFA regulations. We require collateral agreements on all derivatives that establish collateral delivery thresholds. Additionally, collateral related to derivatives with member institutions includes collateral assigned to us, as evidenced by a written security agreement, and held by the member institution for our benefit. Based on credit analyses and collateral requirements, we do not anticipate any credit losses on our derivative agreements. SeeNote 15 - Fair Value Accounting for discussion regarding our fair value methodology for derivative assets and liabilities, including an evaluation of the potential for the fair value of these instruments to be affected by counterparty credit risk.

Our derivative agreements contain provisions that require us to post additional collateral with our counterparties if there is deterioration in our credit rating, except for those derivative agreements with a zero unsecured collateral threshold for both parties, in which case positions are required to be fully collateralized regardless of credit rating. If our credit rating is lowered by a major credit rating agency, such as Standard and Poor's or Moody’s, we would be required to deliver additional collateral on derivatives in net liability positions. If our credit rating had been lowered from its current rating to the next lower rating, we would have been required to deliver up to an additional $91 million of collateral at fair value to our derivatives counterparties at September 30, 2012.

We transact most of our derivatives with large banks and major broker-dealers. Some of these banks and broker-dealers or their affiliates buy, sell, and distribute consolidated obligations. We are not a derivative dealer and do not trade derivatives for speculative purposes.

The following table summarizes our derivatives, including cash collateral and related interest where we had the right to reclaim the collateral on derivative assets. We delivered no excess collateral on derivative liabilities for the periods presented.

	September 30, 2012								December 31, 2011
As of	Notional Amount		Derivative Assets			Derivative Liabilities			Notional Amount		Derivative Assets			Derivative Liabilities
Derivatives in hedge accounting relationships-
Interest rate swaps	$	25,509	$	132		$	2,233		$	28,240	$	203		$	2,099
Interest rate swaptions	—		—			—			370		32			—
Total	25,509		132			2,233			28,610		235			2,099
Derivatives not in hedge accounting relationships-
Interest rate swaps	17,889		740			691			38,159		927			785
Interest rate swaptions	6,290		164			—			4,820		179			—
Interest rate caps or floors	1,913		243			—			1,913		254			—
Mortgage delivery commitments	1,499		25			25			502		4			4
Total	27,591		1,172			716			45,394		1,364			789
Total before adjustments	$	53,100	1,304			2,949			$	74,004	1,599			2,888
Netting adjustments a			(1,214		)	(1,214		)			(1,461		)	(1,461		)
Exposure at fair value b			90			1,735					138			1,427
Cash collateral and related accrued interest			(35		)	(1,616		)			(98		)	(1,221		)
Derivative assets and liabilities			$	55		$	119				$	40		$	206

^a  Amounts represent the effect of legally enforceable master netting agreements that allow us to settle positive and negative positions.

^b  Includes net accrued interest receivable of $3 million as of September 30, 2012, and $13 million as of December 31, 2011.

The following tables present the components of derivatives and hedging activities as presented in the statements of income.

	Three months ended September 30,						Nine months ended September 30,
For the periods ending	2012			2011			2012			2011
Fair value hedges -
Interest rate swaps	$	—		$	(16	)	$	(3	)	$	(10	)
Other	—			2			1			(5		)
Fair value hedges - ineffectiveness net gain (loss)	—			(14		)	(2		)	(15		)
Cash flow hedges - ineffectiveness net gain (loss)	—			26			2			40
Economic hedges -
Interest rate swaps	(29		)	(180		)	(75		)	(185		)
Interest rate swaptions	6			201			24			141
Interest rate caps/floors	(2		)	42			(11		)	32
Interest rate futures/TBA	—			—			—			—
Mortgage delivery commitments	1			—			1			—
Net interest settlements	23			20			63			64
Economic hedges - net gain (loss)	(1		)	83			2			52
Net gains (losses) on derivatives and hedging activities	$	(1	)	$	95		$	2		$	77

Fair Value Hedges

The following table presents, by type of hedged item, the gains (losses) on derivatives and the related hedged items in fair value hedging relationships and the effect of those derivatives on our net interest income.

	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item			Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities			Effect of Derivatives on Net Interest Income a			Hedge Adjustments Amortized into Net Interest Income b
Three months ended September 30, 2012
Hedged item type -
Available-for-sale securities	$	(35	)	$	36		$	1		$	(33	)	$	—
Advances	(5		)	6			1			(19		)	—
MPF Loans held for portfolio	—			—			—			—			(12		)
Consolidated obligation bonds	(4		)	2			(2		)	31			(6		)
Total	$	(44	)	$	44		$	—		$	(21	)	$	(18	)
Three months ended September 30, 2011
Hedged item type -
Available-for-sale securities	$	(335	)	$	323		$	(12	)	$	(36	)	$	—
Advances	(43		)	44			1			(29		)	(42		)
MPF Loans held for portfolio	4			(2		)	2			(1		)	(12		)
Consolidated obligation bonds	162			(167		)	(5		)	79			(11		)
Total	$	(212	)	$	198		$	(14	)	$	13		$	(65	)
Nine months ended September 30, 2012
Hedged item type -
Available-for-sale investments	$	(112	)	$	111		$	(1	)	$	(98	)	$	—
Advances	(13		)	20			7			(64		)	(24		)
MPF Loans held for portfolio	1			—			1			(2		)	(39		)
Consolidated obligation bonds	3			(12		)	(9		)	111			(22		)
Total	$	(121	)	$	119		$	(2	)	$	(53	)	$	(85	)
Nine months ended September 30, 2011
Hedged item type -
Available-for-sale investments	$	(419	)	$	405		$	(14	)	$	(103	)	$	—
Advances	(26		)	34			8			(115		)	(51		)
MPF Loans held for portfolio	(2		)	(4		)	(6		)	(6		)	(37		)
Consolidated obligation bonds	291			(294		)	(3		)	239			(29		)
Total	$	(156	)	$	141		$	(15	)	$	15		$	(117	)

^a  Represents the effect of net interest settlements attributable to existing derivative hedging instruments on net interest income. The effect of derivatives on net interest income is included in the interest income/expense line item of the respective hedged item type.

^b  Amortization of hedge adjustments is included in the interest income/expense line item of the respective hedged item type.

Cash Flow Hedges

The following table presents our gains (losses) on our cash-flow hedging relationships recorded in income and other comprehensive income (loss). In the tables below, in cases where amounts are insignificant in the aggregate, we don't report a balance.

	Effective Portion Reclassified From AOCI to Interest			Ineffective Portion Reclassified to Derivatives and Hedging Activities			Total Reclassified Into Statements of Income			Effective Portion Recorded in AOCI			Total Change in OCI			Net Interest Settlements Effect on Net Interest Income a
Three months ended September 30, 2012
Advances - interest rate floors	$	3		$	—	b	$	3		$	—		$	(3	)	$	—
Discount notes -      interest rate caps	(1		)	—			(1		)	—			1			—
interest rate swaps	—			—			—			(33		)	(33		)	(67		)
Bonds - interest rate swaps	(1		)	—			(1		)	—			1			—
Total	$	1		$	—		$	1		$	(33	)	$	(34	)	$	(67	)
Three months ended September 30, 2011
Advances - interest rate floors	$	4		$	25	b	$	29		$	—		$	(29	)	$	—
Discount notes -      interest rate caps	(3		)	—			(3		)	—			3			—
interest rate swaps	(2		)	1			(1		)	(400		)	(399		)	(80		)
Bonds - interest rate swaps	(2		)	—			(2		)	—			2			—
Total	$	(3	)	$	26		$	23		$	(400	)	$	(423	)	$	(80	)
Nine months ended September 30, 2012
Advances - interest rate floors	$	11		$	—	b	$	11		$	—		$	(11	)	$	—
Discount notes -      interest rate caps	(5		)	—			(5		)	—			5			—
interest rate swaps	(2		)	2			—			(91		)	(91		)	(202		)
Bonds - interest rate swaps	(4		)	—			(4		)	—			4			—
Total	$	—		$	2		$	2		$	(91	)	$	(93	)	$	(202	)
Nine months ended September 30, 2011
Advances - interest rate floors	$	26		$	37	b	$	63		$	—		$	(63	)	$	—
Discount notes -      interest rate caps	(11		)	—			(11		)	—			11			—
interest rate swaps	(4		)	3			(1		)	(453		)	(452		)	(241		)
Bonds - interest rate swaps	(4		)	—			(4		)	—			4			—
Total	$	7		$	40		$	47		$	(453	)	$	(500	)	$	(241	)

^a  Represents the effect of net interest settlements attributable to open derivative hedging instruments on net interest income. The effect of     derivatives on net interest income is included in the interest income/expense line item of the respective hedged item type.

^b  Represents the recognition of previously deferred cash flow hedge adjustments related to advances in cash flow hedge relationships that were prepaid during the period.

There were no amounts reclassified from AOCI into earnings for the periods presented as a result of the discontinuance of cash-flow hedges because the original forecasted transactions failed to occur by the end of the originally specified time period or within a two-month period thereafter. The deferred net gains on derivative instruments in AOCI that are expected to be reclassified to earnings during the next twelve months were $10 million as of September 30, 2012. The maximum length of time over which we are hedging our exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, is 8 years.

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Consolidated Obligations (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Consolidated Obligation Bonds [Abstract]
Total consolidated obligation bonds	$ 33,366	$ 39,880
Consolidated Obligation Discount Notes [Abstract]
Carrying Value	27,231	25,404
Discount Notes [Member]
Consolidated Obligation Discount Notes [Abstract]
Carrying Value	27,231	25,404
Par Value	27,235	25,411
Weighted Average Interest Rate	0.13%	0.05%
Consolidated Obligation Bonds [Member]
Consolidated Obligation Bonds [Abstract]
Due in one year or less	7,646
One to two years	5,615
Two to three years	2,125
Three to four years	3,768
Four to five years	5,890
Thereafter	8,378
Total Par Value	33,422	39,964
Due in one year or less, Weighted Average Interest Rate	3.37%
One to two years, Weighted Average Interest Rate	3.76%
Two to three years, Weighted Average Interest Rate	2.52%
Three to four years, Weighted Average Interest Rate	3.70%
Four to five years, Weighted Average Interest Rate	2.05%
Thereafter, Weighted Average Interest Rate	2.85%
Total Weighted Average Interest Rate	3.06%
Bond premiums (discounts), net	14	19
Hedging adjustments	(70)	(104)
Fair value option adjustments	0	1
Total consolidated obligation bonds	33,366	39,880
Consolidated Obligation Bonds [Member] | Non Callable [Member]
Consolidated Obligation Bonds [Abstract]
Total Par Value	20,759	24,479
Consolidated Obligation Bonds [Member] | Callable [Member]
Consolidated Obligation Bonds [Abstract]
Total Par Value	12,663	15,485
Consolidated Obligation Bonds [Member] | Next Maturity or Call Date [Member]
Consolidated Obligation Bonds [Abstract]
Due in one year or less	19,153
One to two years	6,150
Two to three years	1,208
Three to four years	2,768
Four to five years	1,575
Thereafter	$ 2,568

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Regulatory Actions (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Regulatory Actions [Abstract]
New Investment Without FHFA Approval, Maximum Maturity	270 days
Minimum Mortgage Backed Securities Portofolio, Total Regulatory Capital Rati	300.00%
Minimum Advances Assets Ratio	50.00%
Regulatory Floor Minimum Level of Retained Earnings	$ 1,321
Retained earnings	$ 1,593	$ 1,321

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Derivatives and Hedging Activities (Cash Flow Hedges) (Details) (Cash Flow Hedges [Member], USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Interest	$ 1		$ (3)		$ 0		$ 7
Ineffective Portion Reclassified to Derivatives and Hedging Activities	0		26		2		40
Total Reclassified Into Statements of Income	1		23		2		47
Effective Portion Recorded in AOCI	(33)		(400)		(91)		(453)
Total Change in AOCI	(34)		(423)		(93)		(500)
Net Interest Settlements Effect on Net Interest Income	(67)	[1]	(80)	[1]	(202)	[1]	(241)	[1]
Advances [Member] | Interest Rate Floor [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Interest	3		4		11		26
Ineffective Portion Reclassified to Derivatives and Hedging Activities	0	[2]	25	[2]	0	[2]	37	[2]
Total Reclassified Into Statements of Income	3		29		11		63
Effective Portion Recorded in AOCI	0		0		0		0
Total Change in AOCI	(3)		(29)		(11)		(63)
Net Interest Settlements Effect on Net Interest Income	0	[1]	0	[1]	0	[1]	0	[1]
Consolidated Obligation Discount Notes [Member] | Interest Rate Cap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Interest	(1)		(3)		(5)		(11)
Ineffective Portion Reclassified to Derivatives and Hedging Activities	0		0		0		0
Total Reclassified Into Statements of Income	(1)		(3)		(5)		(11)
Effective Portion Recorded in AOCI	0		0		0		0
Total Change in AOCI	1		3		5		11
Net Interest Settlements Effect on Net Interest Income	0	[1]	0	[1]	0	[1]	0	[1]
Consolidated Obligation Discount Notes [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Interest	0		(2)		(2)		(4)
Ineffective Portion Reclassified to Derivatives and Hedging Activities	0		1		2		3
Total Reclassified Into Statements of Income	0		(1)		0		(1)
Effective Portion Recorded in AOCI	(33)		(400)		(91)		(453)
Total Change in AOCI	(33)		(399)		(91)		(452)
Net Interest Settlements Effect on Net Interest Income	(67)	[1]	(80)	[1]	(202)	[1]	(241)	[1]
Consolidated Obligation Bonds [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Interest	(1)		(2)		(4)		(4)
Ineffective Portion Reclassified to Derivatives and Hedging Activities	0		0		0		0
Total Reclassified Into Statements of Income	(1)		(2)		(4)		(4)
Effective Portion Recorded in AOCI	0		0		0		0
Total Change in AOCI	1		2		4		4
Net Interest Settlements Effect on Net Interest Income	$ 0	[1]	$ 0	[1]	$ 0	[1]	$ 0	[1]

[1] Represents the effect of net interest settlements attributable to open derivative hedging instruments on net interest income. The effect of derivatives on net interest income is included in the interest income/expense line item of the respective hedged item type.

[2] Represents the recognition of previously deferred cash flow hedge adjustments related to advances in cash flow hedge relationships that were prepaid during the period.

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Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2012

Accumulated Other Comprehensive Income (Loss) [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table summarizes the income (loss) in AOCI for the periods indicated:

	Net Unrealized on AFS		Non-credit OTTI on  AFS			Net Unrealized on HTM			Non-credit OTTI on HTM			Net Unrealized on Cash Flow Hedges			Post-Retirement Plans			Total
Balance, December 31, 2010	$	748	$	(34	)	$	(8	)	$	(630	)	$	(561	)	$	2		$	(483	)
Net change in the period	468		8			3			131			(500		)	—			110
Balance, September 30, 2011	$	1,216	$	(26	)	$	(5	)	$	(499	)	$	(1,061	)	$	2		$	(373	)
Balance, December 31, 2011	$	1,113	$	(26	)	$	(5	)	$	(466	)	$	(1,049	)	$	2		$	(431	)
Net change in the period	477		15			2			68			(93		)	(1		)	468
Balance, September 30, 2012	$	1,590	$	(11	)	$	(3	)	$	(398	)	$	(1,142	)	$	1		$	37

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Investment Securities (Other-than-temporarily Impaired Securities Movement) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning Balance	$ 724	$ 694	$ 712	$ 653
Additional credit losses on securities for which an OTTI charge was previously recognized	0	14	15	57
Total OTTI credit losses recognized in the period	0	14	15	57
Securities sold, matured, paid down or prepaid over the period	0	(1)	0	(1)
Increases in cash flows expected to be collected, recognized over the remaining life of the security	(1)	0	(4)	(2)
Ending Balance	$ 723	$ 707	$ 723	$ 707

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Accumulated Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2012

Accumulated Other Comprehensive Income (Loss) [Abstract]

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

The following table summarizes the income (loss) in AOCI for the periods indicated:

	Net Unrealized on AFS		Non-credit OTTI on  AFS			Net Unrealized on HTM			Non-credit OTTI on HTM			Net Unrealized on Cash Flow Hedges			Post-Retirement Plans			Total
Balance, December 31, 2010	$	748	$	(34	)	$	(8	)	$	(630	)	$	(561	)	$	2		$	(483	)
Net change in the period	468		8			3			131			(500		)	—			110
Balance, September 30, 2011	$	1,216	$	(26	)	$	(5	)	$	(499	)	$	(1,061	)	$	2		$	(373	)
Balance, December 31, 2011	$	1,113	$	(26	)	$	(5	)	$	(466	)	$	(1,049	)	$	2		$	(431	)
Net change in the period	477		15			2			68			(93		)	(1		)	468
Balance, September 30, 2012	$	1,590	$	(11	)	$	(3	)	$	(398	)	$	(1,142	)	$	1		$	37

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Interest Income and Interest Expense (Tables)

9 Months Ended

Sep. 30, 2012

Interest Income and Interest Expense [Abstract]

Interest Income and Interest Expense [Table Text Block]

The following table presents interest income and interest expense for the periods indicated:

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Interest income -
Federal Funds sold	$	1		$	1		$	2		$	3
Securities purchased under agreements to resell	1			—			3			4
Interest bearing deposits	—			—			1			—
Investment securities -
Trading	12			22			43			53
Available-for-sale	160			162			486			489
Held-to-maturity	102			125			326			390
Total investment securities	274			309			855			932
Advances	46			53			140			183
Advance prepayment fees, net of fair value hedge adjustments of    $(0), $(43), $(24), and $(50)	19			15			54			20
Total Advances	65			68			194			203
MPF Loans held in portfolio	127			183			429			578
Less: Credit enhancement fees	(2		)	(2		)	(8		)	(6		)
MPF Loans held in portfolio, net	125			181			421			572
Total interest income	466			559			1,476			1,714
Interest expense -
Securities sold under agreements to repurchase	—			4			—			13
Consolidated obligations -
Discount notes	77			88			230			278
Bonds	235			318			766			991
Total consolidated obligations	312			406			996			1,269
Subordinated notes	14			15			43			43
Total interest expense	326			425			1,039			1,325
Net interest income before provision for credit losses	140			134			437			389
Provision for credit losses	—			3			8			12
Net interest income	$	140		$	131		$	429		$	377

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Investment Securities (Securities Other-than-Temporarily Impaired) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Investment Securities [Line Items]
Unpaid Principal Balance	$ 118
AFS Securities [Member] | Private-label residential MBS [Member]
Investment Securities [Line Items]
Unpaid Principal Balance	124
Amortized Cost	79
Carrying Value	68
Fair Value	68
HTM Securities [Member] | Private-label residential MBS [Member]
Investment Securities [Line Items]
Unpaid Principal Balance	2,261
Amortized Cost	1,645
Carrying Value	1,247
Fair Value	1,533
Alt-A [Member] | AFS Securities [Member] | Private-label residential MBS [Member]
Investment Securities [Line Items]
Unpaid Principal Balance	124
Amortized Cost	79
Carrying Value	68
Fair Value	68
Prime [Member] | HTM Securities [Member] | Private-label residential MBS [Member]
Investment Securities [Line Items]
Unpaid Principal Balance	1,419
Amortized Cost	1,098
Carrying Value	818
Fair Value	1,024
Subprime [Member] | HTM Securities [Member] | Private-label residential MBS [Member]
Investment Securities [Line Items]
Unpaid Principal Balance	842
Amortized Cost	547
Carrying Value	429
Fair Value	$ 509

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Investment Securities (Available-for-sale Securities) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	$ 22,250	$ 23,229
Non-Credit OTTI Recognized in AOCI (Loss)	(11)	(26)
Gross Unrealized Gains in AOCI	1,670	1,242
Gross Unrealized Losses in AOCI	(80)	(129)
Fair Value	23,829	24,316
U.S. Government & Other Government Related [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	713	947
Non-Credit OTTI Recognized in AOCI (Loss)	0	0
Gross Unrealized Gains in AOCI	63	56
Gross Unrealized Losses in AOCI	0	(2)
Fair Value	776	1,001
FFELP ABS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	7,176	7,796
Non-Credit OTTI Recognized in AOCI (Loss)	0	0
Gross Unrealized Gains in AOCI	525	398
Gross Unrealized Losses in AOCI	(14)	(35)
Fair Value	7,687	8,159
GSE residential MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	11,494	11,565
Non-Credit OTTI Recognized in AOCI (Loss)	0	0
Gross Unrealized Gains in AOCI	897	658
Gross Unrealized Losses in AOCI	(65)	(91)
Fair Value	12,326	12,132
Government-guaranteed residential MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	2,786	2,831
Non-Credit OTTI Recognized in AOCI (Loss)	0	0
Gross Unrealized Gains in AOCI	185	130
Gross Unrealized Losses in AOCI	0	0
Fair Value	2,971	2,961
Private-label residential MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	81	90
Non-Credit OTTI Recognized in AOCI (Loss)	(11)	(26)
Gross Unrealized Gains in AOCI	0	0
Gross Unrealized Losses in AOCI	(1)	(1)
Fair Value	69	63
MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	14,361	14,486
Non-Credit OTTI Recognized in AOCI (Loss)	(11)	(26)
Gross Unrealized Gains in AOCI	1,082	788
Gross Unrealized Losses in AOCI	(66)	(92)
Fair Value	$ 15,366	$ 15,156

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Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Net income	$ 90		$ 141		$ 275		$ 208
Net unrealized gain (loss) on available-for-sale securities
Unrealized gains (losses)	265		311		477		468
Total net unrealized gain (loss) on available-for-sale securities	265		311		477		468
Net unrealized gain (loss) on held-to-maturity securities
Reclassification to net income	0	[1]	2	[1]	2	[1]	3	[1]
Total net unrealized gain (loss) on held-to-maturity securities	0	[1]	2	[1]	2	[1]	3	[1]
Non-credit OTTI on available-for-sale securities
Net change in fair value	10		(3)		15		2
Reclassification of net non-credit portion to (from) statements of income	0		0		0		6
Total non-credit OTTI on available-for-sale securities	10		(3)		15		8
Non-credit OTTI on held-to-maturity securities
Reclassification of non-credit portion to (from) statements of income	0		7		13		35
Accretion of non-credit portion to HTM asset	18		29		55		96
Total non-credit OTTI on held-to-maturity securities	18		36		68		131
Net unrealized gain (loss) on hedging activities
Unrealized gains (losses)	(33)		(400)		(91)		(453)
Reclassification of net realized (gains) losses to net income	(1)		(23)		(2)		(47)
Total net unrealized gain (loss) on hedging activities	(34)		(423)		(93)		(500)
Post retirement plans - reclassification to net income	(1)		0		(1)		0
Total other comprehensive income	258		(77)		468		110
Total comprehensive income	$ 348		$ 64		$ 743		$ 318

[1] This item relates to the amortization of fair value adjustments from a 2007 transfer at fair value of available-for-sale securities to held-to-maturity securities.

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Recently Issued but Not Yet Adopted Accounting Standards

9 Months Ended

Sep. 30, 2012

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recently Issued but Not Yet Adopted Accounting Standards [Text Block]

Recently Issued but Not Yet Adopted Accounting Standards

Asset Classification and Charge-offs

On April 9, 2012, the FHFA issued Advisory Bulletin 2012-02, Framework for Adversely Classifying Loans, Other Real Estate Owned, and Other Assets and Listing Assets for Special Mention (AB 2012-02). The guidance establishes a standard and uniform methodology for classifying assets and prescribes the timing of asset charge-offs, excluding investment securities. The guidance in AB 2012-02 is generally consistent with the Uniform Retail Credit Classification and Account Management Policy issued by the federal banking regulators in June 2000. AB 2012-02 states that it was effective upon issuance. We are currently assessing the provisions of AB 2012-02 in coordination with the FHFA and therefore have not yet determined when we will implement the guidance, or its effect on our operating activities or financial statements.

Disclosures about Offsetting Assets and Liabilities

In December of 2011, the FASB issued new disclosure requirements pertaining to offsetting (netting) of assets and liabilities to increase the comparability between the statement of financial position prepared under U.S. GAAP and the statement of financial position prepared under IFRS. Currently, offsetting requirements represent a significant difference between amounts presented in the statement of financial position of entities that prepare their statement of financial position pursuant to U.S. GAAP versus entities that prepare their statement of financial position pursuant to IFRS. We would be required to disclose both gross information and net information about both instruments and transactions eligible for offset in our statement of condition and instruments and transactions subject to an agreement such as a master netting arrangement. Similar agreements include (1) derivative clearing agreements, (2) global master repurchase agreements, and (3) global master securities lending agreements. Similar financial instruments include (1) derivatives, (2) sale and repurchase agreements and reverse sale and repurchase agreements, and (3) securities borrowing and securities lending arrangements. Our policy is to only offset derivative instruments in our statements of condition. We do not have other financial instruments within the scope of the new guidance that are subject to an enforceable master netting arrangement or similar agreement. The new guidance takes effect for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. The disclosure requirements would be applied retrospectively for all comparative periods presented.

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Allowance for Credit Losses (Impaired MPF Loans) (Details) (MPF Loans Held For Portfolio [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
MPF Loans Held For Portfolio [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 223		$ 223		$ 204
Unpaid Principal Balance	221		221		202
Related Allowance	31		31		26
Average Recorded Investment	210	138	207	136
Interest Income Recognized	$ 3	$ 2	$ 7	$ 5

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Fair Value Accounting (Valuation Techniques and Significant Inputs) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 55		$ 40
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Private-label residential MBS - OTTI	69
HTM Private-label residential MBS - OTTI	1,793
Derivative assets	32	[1]
Consolidated Obligation Bonds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds	82	[2]
Consolidated Obligation Bonds [Member] | CO Curve [Member] | Non Callable [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds	82
AFS Securities [Member] | Private-label residential MBS [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Private-label residential MBS - OTTI	69
AFS Securities [Member] | Minimum [Member] | Third Party Pricing Service [Member] | Private-label residential MBS [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Private-label residential MBS - OTTI	62
AFS Securities [Member] | Maximum [Member] | Third Party Pricing Service [Member] | Private-label residential MBS [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Private-label residential MBS - OTTI	75
HTM Securities [Member] | Private-label residential MBS [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
HTM Private-label residential MBS - OTTI	3
HTM Securities [Member] | Minimum [Member] | Third Party Pricing Service [Member] | Private-label residential MBS [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
HTM Private-label residential MBS - OTTI	3
HTM Securities [Member] | Maximum [Member] | Third Party Pricing Service [Member] | Private-label residential MBS [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
HTM Private-label residential MBS - OTTI	$ 3

[1] Our derivative assets are, in part, secured with cash collateral as described in Note 9 - Derivatives and Hedging Activities. We also provide cash collateral to our counterparties in order to secure our derivative liabilities. We do not reclassify the amount of cash collateral as Level 1, even though on a standalone basis it would be considered Level 1 within the fair value hierarchy. This is because we elected the portfolio exception for purposes of measuring the credit risk adjustment component of fair value for our derivative assets and liabilities. Specifically, we view our net derivative assets or liabilities as a single unit of account for purposes of classifying the total balance within the fair value hierarchy. Accordingly, from a single unit of account perspective, we classify our derivative assets and liabilities as either Level 2 or Level 3 within the fair value hierarchy.

[2] Amount represents debt carried at fair value under a fair value hedge strategy, not at fair value under the fair value option.

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2012

Investment Securities [Line Items]

Trading Securities by Major Security Type [Table Text Block]

The following table presents the fair value of our trading securities:

As of	September 30, 2012		December 31, 2011
U.S. Government & other government related	$	2,545	$	2,737
MBS:
GSE residential	137		195
Government-guaranteed residential	3		3
Total MBS	140		198
Total trading securities	$	2,685	$	2,935

Available-for-sale Securities by Major Security Type [Table Text Block]

Amortized Cost Basis and Fair Value – Available-for-Sale Securities (AFS)

	Amortized Cost Basis		Non-Credit  OTTI Recognized  in AOCI (Loss)			Gross Unrealized Gains in AOCI		Gross Unrealized Losses in AOCI			Fair Value
As of September 30, 2012
U.S. Government & other government related	$	713	$	—		$	63	$	—		$	776
FFELP ABS	7,176		—			525		(14		)	7,687
MBS:
GSE residential	11,494		—			897		(65		)	12,326
Government-guaranteed residential	2,786		—			185		—			2,971
Private-label residential	81		(11		)	—		(1		)	69
Total MBS	14,361		(11		)	1,082		(66		)	15,366
Total	$	22,250	$	(11	)	$	1,670	$	(80	)	$	23,829
As of December 31, 2011
U.S. Government & other government related	$	947	$	—		$	56	$	(2	)	$	1,001
FFELP ABS	7,796		—			398		(35		)	8,159
MBS:
GSE residential	11,565		—			658		(91		)	12,132
Government-guaranteed residential	2,831		—			130		—			2,961
Private-label residential	90		(26		)	—		(1		)	63
Total MBS	14,486		(26		)	788		(92		)	15,156
Total	$	23,229	$	(26	)	$	1,242	$	(129	)	$	24,316

Held-to-maturity Securities by Major Security Type [Table Text Block]

Amortized Cost, Carrying Value, and Fair Value - Held-to-Maturity Securities (HTM)

	Amortized Cost Basis		Non-credit OTTI Recognized  in AOCI (Loss)			Carrying Value		Gross Unrecognized Holding  Gains		Gross Unrecognized Holding  Losses			Fair  Value
As of September 30, 2012
U.S. Government & other government related	$	2,252	$	—		$	2,252	$	139	$	—		$	2,391
State or local housing agency	25		—			25		—		—			25
MBS:
GSE residential	4,653		—			4,653		422		—			5,075
Government-guaranteed residential	1,353		—			1,353		53		—			1,406
Private-label residential	1,905		(398		)	1,507		295		(9		)	1,793
Total MBS	7,911		(398		)	7,513		770		(9		)	8,274
Total	$	10,188	$	(398	)	$	9,790	$	909	$	(9	)	$	10,690
As of December 31, 2011
U.S. Government & other government related	$	2,573	$	—		$	2,573	$	104	$	—		$	2,677
State or local housing agency	27		—			27		—		—			27
MBS:
GSE residential	5,761		—			5,761		423		—			6,184
Government-guaranteed residential	1,414		—			1,414		34		—			1,448
Private-label residential	2,168		(466		)	1,702		145		(52		)	1,795
Total MBS	9,343		(466		)	8,877		602		(52		)	9,427
Total	$	11,943	$	(466	)	$	11,477	$	706	$	(52	)	$	12,131

Securities by Contractual Maturity [Table Text Block]

The table below presents the amortized cost basis and fair value of AFS and HTM securities by contractual maturity, excluding ABS and MBS securities. These securities are excluded because their expected maturities may differ from their contractual maturities if borrowers of the underlying loans elect to prepay their loans.

	Available-for-Sale				Held-to-Maturity
As of September 30, 2012	Amortized Cost		Fair  Value		Carrying Value		Fair  Value
Year of Maturity -
Due in one year or less	$	—	$	—	$	506	$	509
Due after one year through five years	113		122		58		59
Due after five years through ten years	105		114		493		520
Due after ten years	495		540		1,220		1,328
Total non-ABS/MBS	713		776		2,277		2,416
ABS and MBS	21,537		23,053		7,513		8,274
Total securities	$	22,250	$	23,829	$	9,790	$	10,690

Recovery Ranges of Housing Price Change [Table Text Block]

The following table presents the projected home price recovery by future month.

As of September 30, 2012	Recovery Range Annualized %
Months	Low	High
1-6	0.0%	2.8%
7-18	0.0%	3.0%
19-24	1.0%	4.0%
25-30	2.0%	4.0%
31-42	2.0%	5.0%
43-66	2.0%	6.0%
Thereafter	2.3%	5.6%

Significant Inputs for OTTI [Table Text Block]

The table below presents the inputs we used to measure the amount of the credit loss recognized in earnings during the current period attributable to OTTI securities. The model used to estimate cash flows classifies the OTTI securities as either prime, Alt-A, or subprime based on an assessment as of the current period rather than the classification at the time of issuance.

			Prepayment Rates			Default Rates			Loss Severities			Credit Enhancement
			%	Range %		%	Range %		%	Range %		%	Range %
As of September 30, 2012	Unpaid Principal Balance		Weighted Average	Low	High	Weighted Average	Low	High	Weighted Average	Low	High	Weighted Average	Low	High
2006 Prime	$	103	8.4	8.1	9.3	36.6	27.4	40.6	42.3	40.0	43.3	3.2	1.9	6.3
2006 Subprime	15		2.8	2.0	3.6	79.8	71.5	87.5	74.2	69.3	78.7	1.3	—	2.5
Total	$	118	7.7	2.0	9.3	42.2	27.4	87.5	46.4	40.0	78.7	3.0	—	6.3

Total Securities Other-than-Temporarily Impaired during the Life of the Security [Table Text Block]

The following table presents the current outstanding balances on private-label MBS that were other-than-temporarily impaired at some point during the life of the securities. This table does not include HTM and AFS securities that are in an unrealized loss position, which have not had an OTTI charge during the life of the security.

As of September 30, 2012	Unpaid Principal Balance		Amortized Cost Basis		Carrying Value		Fair Value
Private-label residential MBS:
Alt-A	$	124	$	79	$	68	$	68
Total OTTI AFS securities	$	124	$	79	$	68	$	68
Private-label residential MBS:
Prime	$	1,419	$	1,098	$	818	$	1,024
Subprime	842		547		429		509
Total OTTI HTM securities	$	2,261	$	1,645	$	1,247	$	1,533

Credit Losses and Net Amount of Impairment Losses [Table Text Block]

We recognized OTTI as presented in the following table. Net non-credit portion reclassified (from) to AOCI represents the net amount of impairment losses recognized into earnings from AOCI or reclassified to AOCI from earnings.

	Total OTTI			Net Non-credit Portion (from) to AOCI			OTTI Credit Portion
Three months ended September 30, 2012
Total OTTI	$	—		$	—		$	—
Three months ended September 30, 2011
Prime	$	—		$	(11	)	$	(11	)
Subprime	(7		)	4			(3		)
Total OTTI	$	(7	)	$	(7	)	$	(14	)
Nine months ended September 30, 2012
Prime	$	—		$	(14	)	$	(14	)
Subprime	(2		)	1			(1		)
Total OTTI	$	(2	)	$	(13	)	$	(15	)
Nine months ended September 30, 2011
Prime	$	—		$	(35	)	$	(35	)
Alt-A	—			(6		)	(6		)
Subprime	(16		)	—			(16		)
Total OTTI	$	(16	)	$	(41	)	$	(57	)

Rollforward of the Amounts Related to Credit Losses Recognized into Earnings [Table Text Block]

The following table presents the changes in the cumulative amount of credit losses (recognized into earnings) on OTTI investment securities for the periods stated.

Three months ended September 30,	2012			2011
Beginning Balance	$	724		$	694
Additions:
Additional credit losses on securities for which an OTTI charge was previously recognized	—			14
Total OTTI credit losses recognized in the period	—			14
Reductions:
Securities sold, matured, paid down, or prepaid over the period	—			(1		)
Increases in cash flows expected to be collected that have been recognized into net income	(1		)	—
Ending Balance	$	723		$	707
Nine months ended September 30,
Beginning Balance	$	712		$	653
Additions:
Additional credit losses on securities for which an OTTI charge was previously recognized	15			57
Total OTTI credit losses recognized in the period	15			57
Reductions:
Securities sold, matured, paid down, or prepaid over the period	—			(1		)
Increases in cash flows expected to be collected that have been recognized into net income	(4		)	(2		)
Ending Balance	$	723		$	707

Categories of Investments, Marketable Securities, Available-for-sale Securities [Member]

Investment Securities [Line Items]

Securities in a Continuous Unrealized Loss Position [Table Text Block]

Available-for-Sale Securities

	Less than 12 Months					12 Months or More						Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses				Fair Value		Gross Unrealized Losses
As of September 30, 2012
U.S. Government & other government related	$	—	$	—		$	49	$	—			$	49	$	—
FFELP ABS	—		—			1,123		(14		)		1,123		(14		)
MBS:
GSE residential	—		—			3,685		(65		)		3,685		(65		)
Private-label residential	—		—			69		(12		)	a	69		(12		)	a
Total MBS	—		—			3,754		(77		)		3,754		(77		)
Total available-for-sale securities	$	—	$	—		$	4,926	$	(91	)		$	4,926	$	(91	)
As of December 31, 2011
U.S. Government & other government related	$	98	$	(2	)	$	—	$	—			$	98	$	(2	)
FFELP ABS	223		(3		)	1,203		(32		)		1,426		(35		)
MBS:
GSE residential	4,073		(91		)	—		—				4,073		(91		)
Government-guaranteed residential	33		—			80		—				113		—
Private-label residential	—		—			63		(27		)	a	63		(27		)	a
Total MBS	4,106		(91		)	143		(27		)		4,249		(118		)
Total available-for-sale securities	$	4,427	$	(96	)	$	1,346	$	(59	)		$	5,773	$	(155	)

^a  Includes $36 million and $28 million of gross unrealized/unrecognized recoveries in fair value at September 30, 2012, and at December 31, 2011.

Categories of Investments, Marketable Securities, Held-to-maturity Securities [Member]

Investment Securities [Line Items]

Securities in a Continuous Unrealized Loss Position [Table Text Block]

Held-to-Maturity Securities

	Less than 12 Months				12 Months or More					Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
As of September 30, 2012
MBS:
Private-label residential	$	—	$	—	$	1,645	$	(407	)	$	1,645	$	(407	)
Total MBS	—		—		1,645		(407		)	1,645		(407		)
Total held-to-maturity securities	$	—	$	—	$	1,645	$	(407	)	$	1,645	$	(407	)
As of December 31, 2011
U.S. Government & other government related	$	7	$	—	$	—	$	—		$	7	$	—
MBS:
GSE residential	—		—		37		—			37		—
Private-label residential	—		—		1,653		(518		)	1,653		(518		)
Total MBS	—		—		1,690		(518		)	1,690		(518		)
Total held-to-maturity securities	$	7	$	—	$	1,690	$	(518	)	$	1,697	$	(518	)

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Fair Value Accounting (Fair Value Option) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Fair Value, Option, Quantitative Disclosures [Roll Forward]
Net gain (loss) on instruments held at fair value	$ (6)	$ 0	$ 2	$ (13)
Advances [Member]
Fair Value, Option, Quantitative Disclosures [Roll Forward]
Balance beginning of period	9	9	9	4
New transactions elected for fair value option	0	0	0	5
Maturities and extinguishments	0	0	0	0
Net gain (loss) on instruments held at fair value	0	0	0	0
Change in accrued interest and other	0	0	0	0
Balance end of period	9	9	9	9
Consolidated Obligation Bonds [Member]
Fair Value, Option, Quantitative Disclosures [Roll Forward]
Balance beginning of period	(7,017)	(4,073)	(2,631)	(9,425)
New transactions elected for fair value option,	(6,300)	(4,885)	(15,190)	(9,044)
Maturities and extinguishments	12,465	4,150	16,965	13,669
Net gain (loss) on instruments held at fair value	(6)	0	0	(13)
Change in accrued interest and other	3	(4)	1	1
Balance end of period	(855)	(4,812)	(855)	(4,812)
Discount Notes [Member]
Fair Value, Option, Quantitative Disclosures [Roll Forward]
Balance beginning of period	(4,135)	(1,202)	(11,466)	(4,864)
New transactions elected for fair value option,	0	(5,499)	0	(5,649)
Maturities and extinguishments	1,878	100	9,214	3,916
Net gain (loss) on instruments held at fair value	0	0	2	0
Change in accrued interest and other	(1)	(2)	(8)	(6)
Balance end of period	$ (2,258)	$ (6,603)	$ (2,258)	$ (6,603)

XML

Interest Income and Interest Expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Interest income -
Federal Funds sold	$ 1	$ 1	$ 2	$ 3
Securities purchased under agreements to resell	1	0	3	4
Interest bearing deposits	0	0	1	0
Investment securities -
Trading	12	22	43	53
Available-for-sale	160	162	486	489
Held-to-maturity	102	125	326	390
Total investment securities	274	309	855	932
Advances	46	53	140	183
Advance prepayment fees, net of fair value hedge adjustments of $(0), $(43), $(24), and $(50)	19	15	54	20
Total Advances	65	68	194	203
MPF Loans held in portfolio	127	183	429	578
Less: Credit enhancement fees	(2)	(2)	(8)	(6)
MPF Loans held in portfolio, net	125	181	421	572
Total interest income	466	559	1,476	1,714
Interest expense -
Securities sold under agreements to repurchase	0	4	0	13
Consolidated obligations -
Discount notes	77	88	230	278
Bonds	235	318	766	991
Total consolidated obligations	312	406	996	1,269
Subordinated notes	14	15	43	43
Total interest expense	326	425	1,039	1,325
Net interest income before provision for credit losses	140	134	437	389
Provision for credit losses	0	3	8	12
Net interest income	$ 140	$ 131	$ 429	$ 377

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Capital Stock and Mandatorily Redeemable Capital Stock (MRCS)

9 Months Ended

Sep. 30, 2012

Capital [Abstract]

Capital Stock and Mandatorily Redeemable Capital Stock (MRCS) [Text Block]

Capital Stock and Mandatorily Redeemable Capital Stock (MRCS)

Capital Rules

For capital rules that were in effect prior to our conversion to our new Capital Plan on January 1, 2012, see Capital Rules prior to Conversion to New Capital Structure on page F-53 in our 2011 Form 10-K.

Under the new Capital Plan, which became effective January 1, 2012, our stock consists of two sub-classes of stock, Class B-1 stock and Class B-2 stock (together, Class B stock), both with a par value of $100 and redeemable on five years' written notice, subject to certain conditions.

Under the Capital Plan, each member is required to own capital stock in an amount equal to the greater of a membership stock requirement or an activity stock requirement, as further discussed in Capital Rules after Conversion to New Capital Structure on page F-53 in our 2011 Form 10-K. Membership stock requirements will continue to be recalculated annually, whereas the activity stock requirement will apply on a continuing basis.

We may only redeem or repurchase capital stock from a member if, following the redemption or repurchase, the member will continue to meet its minimum investment requirement and we remain in compliance with our regulatory capital requirements. As further discussed in Note 12 - Regulatory Actions, the Board of Directors has adopted a resolution which may not be amended without FHFA consent governing our repurchases of excess stock. Pursuant to that resolution, we are required to continue making quarterly repurchases of excess capital stock from members on a pro rata basis, subject to satisfaction of certain conditions. For as long as we continue to make such quarterly repurchases, we anticipate that individual members' requests for repurchase of excess Class B-2 Stock will not be fulfilled. Upon request we will continue to repurchase excess Class B-1 Stock that is in excess of a member's capital stock “floor.”

During the three and nine months ended September 30, 2012, we repurchased excess capital stock (including capital stock reclassified as MRCS) totaling $148 million and $798 million. At September 30, 2012, we had remaining excess capital stock of $301 million compared to $1.1 billion at December 31, 2011.

Although our Repurchase Plan terminated by its terms in May, 2012, pursuant to the resolution adopted our Board of Directors (as discussed in Note 12 - Regulatory Actions), we continue to repurchase excess capital stock held by members if we maintain compliance with financial and capital thresholds set forth in the Repurchase Plan as discussed in Repurchase of Excess Capital Stock on page F-56 in our 2011 Form 10-K. On October 15, 2012, following our assessment that we met the thresholds for repurchase based on the financial results for the third quarter of 2012, we notified members of another repurchase opportunity and the process for requesting repurchase. In accordance with that process, we announced that we plan to repurchase excess capital stock of $100 million on November 15, 2012.

Capital Concentration

As of September 30, 2012, BMO Harris Bank National Association held $236 million, or 14%, of our total capital stock outstanding. No other members had capital stock exceeding 10%.

Minimum Capital Requirements

After we implemented our new Capital Plan on January 1, 2012, we are required by regulation to maintain:

• permanent capital equal to the sum of our (i) credit risk capital requirement, (ii) market risk capital requirement, and (iii) operations risk capital requirement, all of which are calculated in accordance with rules and regulations of the FHFA. Permanent capital includes our retained earnings plus the amount paid in for our Class B stock, including Class B stock classified as mandatorily redeemable; and

• a minimum ratio of total regulatory capital (which includes permanent capital plus any general allowance for losses) to total assets of 4.0%; and

• a minimum ratio of leverage capital (which includes permanent capital multiplied by 1.5 plus any general allowance for losses) to total assets of 5.0%.

Total regulatory capital and permanent capital do not include accumulated other comprehensive income (loss). For further discussion of these minimum capital requirements, see Minimum Capital Requirements after Conversion to New Capital Structure on page F-54 of our 2011 Form 10-K.

The following table details our minimum capital requirements at September 30, 2012, under our new Capital Plan:

	September 30, 2012
	Required			Actual
Risk-based capital	$	1,516		$	3,305
Capital-to-assets ratio (regulatory)	4.00		%	4.97		%
Regulatory capital	$	2,658		$	3,305
Leverage capital-to-assets ratio (regulatory)	5.00		%	7.46		%
Leverage capital	$	3,322		$	4,957

Detailed components of our Risk-Based Capital were as follows:

	September 30, 2012
Credit risk	$	1,125
Market risk	41
Operations risk	350
Total risk-based capital requirement	$	1,516
Actual permanent capital	$	3,305

In addition, under the FHFA regulation on capital classifications and critical capital levels for the FHLBs, we are adequately capitalized.

At December 31, 2011, prior to conversion to our new Capital Plan, we were subject to a minimum regulatory leverage limit as further discussed in Minimum Capital Requirements prior to Conversion to New Capital Structure on page F-54 in our 2011 Form 10-K. The following table summarizes our regulatory capital requirements as a percentage of total assets at December 31, 2011, before the conversion to our new Capital Plan.

		Regulatory Capital plus Designated Amount of Subordinated Notes
		Requirement in Effect		Actual
	Non-Mortgage Assets	Ratio	Amount	Ratio	Amount
December 31, 2011	19.19%	4.76%	$3,392	6.35%	$4,527

Mandatorily Redeemable Capital Stock

We reclassify capital stock from equity to mandatorily redeemable capital stock (MRCS) under conditions as further described in Mandatorily Redeemable Capital Stock on page F-55 in our 2011 Form 10-K. As of April 18, 2012, we are no longer required to obtain FHFA approval for such redemptions and repurchases, as further discussed in Note 12 - Regulatory Actions.

The following table shows a reconciliation of the dollar amounts in MRCS, along with the number of current and former members owning the related capital stock at period end:

September 30, 2012	Dollar Amount
MRCS at beginning of year	$	4
Capital stock reclassified to MRCS	54
Redemption of MRCS	(48		)
MRCS at end of period a	$	10
Number of stockholders holding MRCS at period end	13

^a  All MRCS outstanding at the end of the period are redeemable in five years.