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 March 31, 2013

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

As of April 30, 2013, including mandatorily redeemable capital stock, registrant had 16,170,454 total outstanding shares of Class B Capital Stock.

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	17
	Note 7 - MPF Loans	18
	Note 8 - Allowance for Credit Losses	19
	Note 9 - Derivatives and Hedging Activities	23
	Note 10 - Consolidated Obligations	27
	Note 11 - Subordinated Notes	27
	Note 12 - Capital Stock and Mandatorily Redeemable Capital Stock	28
	Note 13 - Accumulated Other Comprehensive Income (Loss)	29
	Note 14 - Fair Value Accounting	30
	Note 15 - Commitments and Contingencies	37
	Note 16 - Transactions with Members and Other FHLBs	37
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations.	38
Item 3.	Quantitative and Qualitative Disclosures about Market Risk.	60
Item 4.	Controls and Procedures.	62
PART II - OTHER INFORMATION		63
Item 1.	Legal Proceedings.	63
Item 1A.	Risk Factors.	63
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds.	64
Item 3.	Defaults upon Senior Securities.	64
Item 4.	Mine Safety Disclosures.	64
Item 5.	Other Information.	64
Item 6.	Exhibits.	64
Glossary of Terms		65
Signatures		S-1

2

Federal Home Loan Bank of Chicago

PART I - FINANCIAL INFORMATION

Item 1.    Financial Statements.

Statements of Condition (unaudited)

(Dollars in millions, except capital stock par value)

	March 31, 2013		December 31, 2012
Assets
Cash and due from banks	$	442	$	3,564
Federal Funds sold	926		—
Securities purchased under agreements to resell	5,835		6,500
Investment securities -
Trading	1,976		1,229
Available-for-sale	23,004		23,454
Held-to-maturity, $9,309 and $10,482 at fair value	8,397		9,567
Total investment securities	33,377		34,250
Advances, $9 and $9 carried at fair value	14,403		14,530
MPF Loans held in portfolio, net of allowance for credit losses of $(40) and $(42)	9,653		10,432
Accrued interest receivable	106		116
Derivative assets	42		47
Software and equipment, net of accumulated amortization/depreciation of $(157) and $(157)	31		32
Other assets	107		113
Total assets	$	64,922	$	69,584
Liabilities
Deposits - Interest bearing	$	741	$	728
- Non-interest bearing	78		88
Total deposits	819		816
Consolidated obligations, net -
Discount notes, $75 and $0 carried at fair value	24,292		31,260
Bonds, $1,250 and $1,251 carried at fair value	34,751		32,569
Total consolidated obligations, net	59,043		63,829
Accrued interest payable	287		156
Mandatorily redeemable capital stock	4		6
Derivative liabilities	79		82
Affordable Housing Program assessment payable	83		78
Other liabilities	158		169
Subordinated notes	1,000		1,000
Total liabilities	61,473		66,136
Commitments and contingencies - Note 15
Capital
Class B-1 Capital stock - putable $100 par value - 1 million and 1 million shares issued and outstanding at March 31, 2013 and December 31, 2012	116		122
Class B-2 Capital stock - putable $100 par value - 14 million and 15 million shares issued and outstanding at March 31, 2013 and December 31, 2012	1,433		1,528
Total Capital stock	1,549		1,650
Retained earnings - unrestricted	1,647		1,584
Retained earnings - restricted	123		107
Total retained earnings	1,770		1,691
Accumulated other comprehensive income (loss)	130		107
Total capital	3,449		3,448
Total liabilities and capital	$	64,922	$	69,584

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 March 31,
	2013			2012
Interest income	$	403		$	525
Interest expense	290			366
Net interest income before provision for credit losses	113			159
Provision for credit losses	—			6
Net interest income	113			153
Non-interest gain (loss) on -
Total other-than-temporary impairment	—			(2		)
Net non-credit portion reclassified to (from) statements of comprehensive income	—			1
Net other-than-temporary impairment (OTTI) charges, credit portion	—			(1		)
Trading securities	(6		)	(14		)
Derivatives and hedging activities	2			11
Instruments held under fair value option	1			6
Other, net	4			4
Total non-interest gain (loss)	1			6
Non-interest expense -
Compensation and benefits	14			15
Other operating expenses	9			9
FHFA	1			2
Office of Finance	1			1
Other	—			3
Total non-interest expense	25			30
Income before assessments	89			129
Affordable Housing Program assessment	9			13
Net income	$	80		$	116

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 March 31,
	2013			2012
Net income	$	80		$	116
Other comprehensive income -
Net unrealized gain (loss) on available-for-sale securities
Unrealized gains (losses)	(85		)	(32		)
Total net unrealized gain (loss) on available-for-sale securities	(85		)	(32		)
Net unrealized gain (loss) on held-to-maturity securities a
Reclassification to net income	1			1
Total net unrealized gain (loss) on held-to-maturity securities	1			1
Non-credit OTTI on available-for-sale securities
Net change in fair value	6			5
Total non-credit OTTI on available-for-sale securities	6			5
Non-credit OTTI on held-to-maturity securities
Non-credit portion OTTI loss transferred from net income	—			(1		)
Accretion of non-credit portion to HTM asset	15			20
Total non-credit OTTI on held-to-maturity securities	15			19
Net unrealized gain (loss) on hedging activities
Unrealized gains (losses)	88			52
Reclassification of net realized (gains) losses to net income	(3		)	(1		)
Total net unrealized gain (loss) on hedging activities	85			51
Post retirement plans - reclassification to net income	1			—
Total other comprehensive income	23			44
Total comprehensive income	$	103		$	160

^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, 2011	24		b	$	2,402		b	$	1,289		$	32	$	1,321		$	(431	)	$	3,292
Comprehensive income								93			23		116			44			160
Proceeds from issuance of capital stock	—			17															17
Repurchases of capital stock	(5	)		(499		)													(499		)
Capital stock reclassified to mandatorily redeemable capital stock	—			(12		)													(12		)
Cash dividends on capital stock (0.10% annualized)								(1		)	—		(1		)				(1		)
Balance, March 31, 2012	19			$	1,908			$	1,381		$	55	$	1,436		$	(387	)	$	2,957
Balance, December 31, 2012	16		b	$	1,650		b	$	1,584		$	107	$	1,691		$	107		$	3,448
Comprehensive income								64			16		80			23			103
Proceeds from issuance of capital stock	—			38															38
Repurchases of capital stock	(1	)		(96		)													(96		)
Capital stock reclassified to mandatorily redeemable capital stock	—			(43		)													(43		)
Cash dividends on capital stock (0.30% annualized)								(1		)	—		(1		)				(1		)
Balance, March 31, 2013	15			$	1,549			$	1,647		$	123	$	1,770		$	130		$	3,449

^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)

	Three months ended March 31,	2013			2012
Operating	Net cash provided by (used in) operating activities	$	311		$	339
Investing	Net change Federal Funds sold	(926		)	(520		)
	Net change securities purchased under agreements to resell	665			(425		)
	Advances -
	Principal collected	62,471			31,206
	Issued	(62,368		)	(30,668		)
	MPF Loans held in portfolio-
	Principal collected	786			975
	Purchases	(13		)	(13		)
	Trading securities -
	Proceeds from maturities, sales, and paydowns	244			134
	Purchases	(1,000		)	—
	Held-to-maturity securities a-
	Short-term held-to-maturity securities, net	705			278
	Proceeds from maturities	494			496
	Purchases	(3		)	(11		)
	Available-for-sale securities -
	Proceeds from maturities and sales	314			344
	Proceeds from sale of foreclosed assets	25			14
	Capital expenditures for software and equipment	(1		)	(2		)
	Net cash provided by (used in) investing activities	1,393			1,808
Financing	Net change deposits	3			83
	Maturities of securities sold under agreements to repurchase	—			(400		)
	Net proceeds from issuance of consolidated obligations -
	Discount notes	199,066			102,532
	Bonds	4,453			10,961
	Payments for maturing and retiring consolidated obligations -
	Discount notes	(206,037		)	(105,514		)
	Bonds	(2,189		)	(9,779		)
	Net proceeds (payments) on derivative contracts with financing element	(18		)	(20		)
	Proceeds from issuance of capital stock	38			17
	Repurchase or redemption of capital stock	(96		)	(499		)
	Redemptions of mandatorily redeemable capital stock	(45		)	(2		)
	Cash dividends paid	(1		)	(1		)
	Net cash provided by (used in) financing activities	(4,826		)	(2,622		)
	Net increase (decrease) in cash and due from banks	(3,122		)	(475		)
	Cash and due from banks at beginning of year	3,564			1,002
	Cash and due from banks at end of period	$	442		$	527
Supplemental	Capital stock reclassified to mandatorily redeemable capital stock	$	43		$	12
	Transfer of MPF Loans to real estate owned	23			22

^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.

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, 2012, included in our Annual Report on Form 10-K (2012 Form 10-K) filed with the SEC.

We do not consolidate any of our investments in variable interest entities. Our investments in variable interest entities include, but are not limited to, senior interests in private label mortgage backed securities (MBS), and Family Federal Education Loan Program (FFELP) asset backed securities (ABS). We have evaluated our investments in variable interest entities as of the periods presented to determine whether or not we are a primary beneficiary in any of them. The primary beneficiary is required to consolidate a variable interest entity. The primary beneficiary is the enterprise that has both of the following characteristics:

• The power to direct the activities of a variable interest entity that most significantly impact the entity's economic performance.

• The obligation to absorb losses of the entity that could potentially be significant to the variable interest entity or the right to receive benefits from the entity that could potentially be significant to the variable interest entity.

Based on these characteristics, we have determined that consolidation accounting is not required for our variable interest entities. Further, we have not provided financial or other support (explicitly or implicitly) during the periods presented in our financial statements to these variable interest entities that we were not previously contractually required to provide nor do we intend to provide such support in the future.

The carrying amounts and classification of the assets that relate to these variable interest entities are shown in investment securities in our statements of condition. We have no liabilities related to these variable interest entities. Our maximum loss exposure for our variable interest entities 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.

Subsequent Events:

As previously disclosed in Note 12 - Assessments to the financial statements in our 2012 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 net of affordable housing assessments in the fourth quarter of 2011 related to our plan to fund affordable housing and economic development projects. This charge was recognized as “Non-interest expense - Other community investment” in our 2011 Statement of Income.

Subsequent to the filing of our 2011 Form 10-K, we developed the Community First ^b Fund, which is a framework for using these funds as part of a revolving loan fund, and submitted it to the FHFA for approval. In April of 2013, we received a letter from the FHFA approving the Community First Fund subject to certain supervisory conditions and further approval by our Board of Directors. In April of 2013, our Board of Directors approved the implementation of the Community First Fund, which resulted in the reversal of the $50 million charge into earnings in the second quarter of 2013. The $50 million reversal will be recognized through “Non-interest expense - Other community investment” in our second quarter 2013 Statement of Income. The reversal will not be included in our AHP assessment for 2013 since we added back the $50 million charge to income before assessments when we accrued our AHP assessment in 2011 - that is, we already have paid our AHP assessment attributable to the $50 million charge.

^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. “Community First” is a trademark 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

Our Summary of Significant Accounting Policies can be found in our 2012 Form 10-K starting on page F-11. There have been no significant changes during the first quarter of 2013.

Note 3 – Recently Issued but Not Yet Adopted Accounting Standards

Joint and Several Liability Arrangements

In February of 2013, the FASB issued new accounting guidance for obligations resulting from joint and several liability arrangements, except for obligations otherwise accounted for elsewhere within GAAP, such as guarantees. The new guidance requires us to measure obligations from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date. Further, any additional estimated amount we expect to pay on behalf of other FHLBs also would be recognized at the reporting date. The accounting for our guarantee to other FHLBs is scoped out of the new guidance, and accordingly, our existing accounting of our guarantee as a related party guarantee will not change. The new guidance becomes effective January 1, 2014 and is required to be applied retrospectively to all prior periods presented for our obligations that exist as of January 1, 2014. Earlier adoption is permitted. The new guidance is not expected to have an effect on our operating activities or financial statements. For further discussion of our joint and several liability see Note 11 - Consolidated Obligations to the financial statements in our 2012 Form 10-K.

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 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. On December 3, 2012, the FHFA issued questions and answers regarding AB 2012-02 that clarified various implementation issues including the date by which the guidance must be fully implemented, which is January 1, 2014. Our transition to AB 2012-02 will be on a prospective basis. AB 2012-02 establishes a standard and uniform methodology for classifying assets, prescribes the timing of asset charge-offs (excluding investment securities), provides measurement guidance with respect to determining our allowance for credit losses, and fair value measurement guidance for real estate owned or “REO” (e.g., use of appraisals). We are in the process of determining the financial statement effects of implementing AB 2012-02.

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 March 31,
	2013		2012
Interest income -
Federal Funds sold	$	1	$	1
Securities purchased under agreements to resell	2		1
Interest bearing deposits	1		—
Investment securities -
Trading	6		17
Available-for-sale	149		165
Held-to-maturity	90		114
Total investment securities	245		296
Advances	36		48
Advance prepayment fees, net of fair value hedge adjustments of $0 and $(22)	5		26
Total Advances	41		74
MPF Loans held in portfolio, net	113		153
Total interest income	403		525
Interest expense -
Consolidated obligations -
Discount notes	77		76
Bonds	199		276
Total consolidated obligations	276		352
Subordinated notes	14		14
Total interest expense	290		366
Net interest income before provision for credit losses	113		159
Provision for credit losses	—		6
Net interest income	$	113	$	153

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. We may pledge investment securities as collateral under these agreements, and in such cases, the amount pledged will be noted on the face of the Statements of Condition. We did not pledge any investment securities as collateral as of March 31, 2013 and December 31, 2012. 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	March 31, 2013		December 31, 2012
U.S. Government & other government related	$	1,868	$	1,106
MBS:
GSE residential	106		120
Government-guaranteed residential	2		3
Total MBS	108		123
Total trading securities	$	1,976	$	1,229

At March 31, 2013, and 2012, we had net year-to-date unrealized gains (losses) of $(6) million and $(14) 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			Carrying and Fair Value
As of March 31, 2013
U.S. Government & other government related	$	648	$	—		$	58	$	—		$	706
FFELP ABS	6,794		—			509		(13		)	7,290
MBS:
GSE residential	11,265		—			800		(46		)	12,019
Government-guaranteed residential	2,732		—			184		—			2,916
Private-label residential	76		(2		)	—		(1		)	73
Total MBS	14,073		(2		)	984		(47		)	15,008
Total	$	21,515	$	(2	)	$	1,551	$	(60	)	$	23,004
As of December 31, 2012
U.S. Government & other government related	$	690	$	—		$	64	$	—		$	754
FFELP ABS	6,958		—			508		(13		)	7,453
MBS:
GSE residential	11,402		—			880		(54		)	12,228
Government-guaranteed residential	2,758		—			192		—			2,950
Private-label residential	78		(8		)	—		(1		)	69
Total MBS	14,238		(8		)	1,072		(55		)	15,247
Total	$	21,886	$	(8	)	$	1,644	$	(68	)	$	23,454

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 March 31, 2013
U.S. Government & other government related	$	1,739	$	—		$	1,739	$	134	$	—		$	1,873
State or local housing agency	24		—			24		—		—			24
MBS:
GSE residential	3,936		—			3,936		330		—			4,266
Government-guaranteed residential	1,321		—			1,321		56		—			1,377
Private-label residential	1,743		(366		)	1,377		394		(2		)	1,769
Total MBS	7,000		(366		)	6,634		780		(2		)	7,412
Total	$	8,763	$	(366	)	$	8,397	$	914	$	(2	)	$	9,309
As of December 31, 2012
U.S. Government & other government related	$	2,487	$	—		$	2,487	$	139	$	—		$	2,626
State or local housing agency	24		—			24		—		—			24
MBS:
GSE residential	4,282		—			4,282		377		—			4,659
Government-guaranteed residential	1,340		—			1,340		57		—			1,397
Private-label residential	1,815		(381		)	1,434		348		(6		)	1,776
Total MBS	7,437		(381		)	7,056		782		(6		)	7,832
Total	$	9,948	$	(381	)	$	9,567	$	921	$	(6	)	$	10,482

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 March 31, 2013
FFELP ABS	$	—	$	—	$	1,055	$	(13	)		$	1,055	$	(13	)
MBS:
GSE residential	—		—		3,504		(46		)		3,504		(46		)
Private-label residential	—		—		68		(3		)	a	68		(3		)	a
Total MBS	—		—		3,572		(49		)		3,572		(49		)
Total available-for-sale securities	$	—	$	—	$	4,627	$	(62	)		$	4,627	$	(62	)
As of December 31, 2012
FFELP ABS	$	—	$	—	$	1,079	$	(13	)		$	1,079	$	(13	)
MBS:
GSE residential	40		—		3,540		(54		)		3,580		(54		)
Private-label residential	—		—		69		(9		)	a	69		(9		)	a
Total MBS	40		—		3,609		(63		)		3,649		(63		)
Total available-for-sale securities	$	40	$	—	$	4,688	$	(76	)		$	4,728	$	(76	)

^a  Includes $52 million and $45 million of gross unrealized/unrecognized recoveries in fair value at March 31, 2013, and at December 31, 2012.

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 March 31, 2013
Private-label residential MBS Held-to-Maturity	$	—	$	—	$	1,626	$	(368	)	$	1,626	$	(368	)
As of December 31, 2012
Private-label residential MBS Held-to-maturity	$	—	$	—	$	1,640	$	(387	)	$	1,640	$	(387	)

14

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

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

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 March 31, 2013	Amortized Cost		Fair  Value		Carrying Value		Fair  Value
Year of Maturity -
Due in one year or less	$	—	$	—	$	62	$	63
Due after one year through five years	87		92		52		53
Due after five years through ten years	99		107		474		504
Due after ten years	462		507		1,175		1,277
Total non-ABS/MBS	648		706		1,763		1,897
ABS and MBS	20,867		22,298		6,634		7,412
Total securities	$	21,515	$	23,004	$	8,397	$	9,309

Other-Than-Temporary Impairment

We recognize 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 are 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. For the three months ended March 31, 2013, we had no OTTI charges.

Significant Inputs Used to Determine OTTI

Our analysis for OTTI on 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.

As of March 31, 2013, we developed a housing price forecast with seven short-term projections with changes ranging from -4.0% to +4.0% over the twelve month period beginning January 1, 2013. For the vast majority of markets, the short-term forecast has changes from -1.0% to +1.0%.  Thereafter, home prices were projected to recover using one of five different recovery paths.

15

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 projected home price recovery by future month.

As of March 31, 2013	Recovery Range Annualized %
Months	Low	High
1-6	0.0%	3.0%
7-12	1.0%	4.0%
13-18	2.0%	4.0%
19-30	2.0%	5.0%
31-42	2.0%	6.0%
43-54	2.0%	6.0%
Thereafter	2.3%	5.6%

Based on these inputs and assumptions for the three months ended March 31, 2013, we had no OTTI charges.

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. In this 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 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. 

As of March 31, 2013	Unpaid Principal Balance		Amortized Cost Basis		Carrying Value		Fair Value
Private-label residential MBS:
Alt-A	$	114	$	74	$	72	$	72
Total OTTI AFS securities	$	114	$	74	$	72	$	72
Private-label residential MBS:
Prime	$	1,305	$	1,014	$	755	$	997
Subprime	798		513		406		555
Total OTTI HTM securities	$	2,103	$	1,527	$	1,161	$	1,552

16

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	March 31, 2013		December 31, 2012
Noncallable/nonputable	$	11,369	$	11,616
Callable	933		776
Putable	1,935		1,948
Total par value	14,237		14,340
Hedging adjustments	141		166
Other adjustments	25		24
Total advances	$	14,403	$	14,530

The following table presents our advances by redemption terms:

As of March 31, 2013	Amount		Weighted Average Interest Rate		Next Maturity or Call Date		Next Maturity or Put Date
Due in one year or less	$	5,177	0.55	%	$	6,104	$	7,100
One to two years	1,165		2.06	%	1,070		1,163
Two to three years	1,167		2.50	%	967		727
Three to four years	1,579		3.41	%	1,379		1,058
Four to five years	4,132		1.19	%	3,755		3,362
More than five years	1,017		2.94	%	962		827
Total par value	$	14,237	1.51	%	$	14,237	$	14,237

Credit Risk Concentration and Collateral Pledged

The following advance borrowers exceeded 10% of our total advances outstanding:

As of March 31, 2013	Par Value Outstanding		% of Total
BMO Harris Bank N.A.	$	2,375	17	%
State Farm Bank, F.S.B	1,500		11	%

We lend to members within our district according to Federal statutes, including the FHLB Act. The FHLB Act requires us to hold, or have access to, collateral to secure our advances, and we do not expect to incur any credit losses on advances. We have policies and procedures in place that are designed to manage our credit risk, including requirements for physical possession or control of pledged collateral, restrictions on borrowing, verifications of collateral and continuous monitoring of borrowings and the member's financial condition. We continue to monitor the collateral and creditworthiness of our borrowers. Based on the collateral pledged as security for advances and our credit analyses of our members' financial condition and our credit extension and collateral policies, we expect to collect all amounts due according to the contractual terms of our advances. See Note 8 - Allowance for Credit Losses for information related to our credit risk on advances and allowance methodology for credit losses.

17

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	March 31, 2013			December 31, 2012
Medium term (15 years or less)	$	2,301		$	2,557
Long term (greater than 15 years)	7,271			7,783
Total unpaid principal balance	9,572			10,340
Net premiums, credit enhancement and deferred loan fees	33			37
Hedging adjustments	88			97
Total before allowance for credit losses	9,693			10,474
Allowance for credit losses	(40		)	(42		)
Total MPF Loans held in portfolio, net	$	9,653		$	10,432
Conventional mortgage loans	$	7,612		$	8,260
Government insured mortgage loans	1,960			2,080
Total unpaid principal balance	$	9,572		$	10,340

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

18

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 8 - Allowance for Credit Losses to the financial statements in our 2012 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 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 2012 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. For detailed definitions of how Total Severity Rate and Credit Loss Severity Rate are calculated, see Loss Severity on page F-38 in our 2012 Form 10-K.

As of	March 31, 2013			December 31, 2012
Total Severity Rate	37.0		%	38.0		%
Credit Loss Severity Rate	21.0		%	22.0		%
Total estimated losses outstanding	$	83		$	88
Less: losses expected to be absorbed by MPF Risk Sharing Structure a	(21		)	(23		)
Our share of total losses	62			65
Less: non-credit losses	(27		)	(27		)
Credit losses	35			38
Plus: other estimated credit losses in the remaining portfolio	5			4
Allowance for credit losses on conventional MPF Loans	$	40		$	42

^a  Represents aggregate of credit enhancements across all master commitments expected to be recovered. Credit enhancement from one master commitment may not be used to offset credit losses incurred by another master commitment.

19

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.

	March 31, 2013			March 31, 2012
For the three months ended
Allowance for credit losses on conventional MPF Loans-
Balance, beginning of period	$	42		$	45
Losses charged to the allowance	(2		)	(2		)
Provision for credit losses	—			6
Balance, end of period	$	40		$	49
As of	March 31, 2013			December 31, 2012
Specifically identified and individually evaluated for impairment	$	30		$	30
Homogeneous pools of loans and collectively evaluated for impairment	10			12
Allowance assigned to conventional MPF Loan	$	40		$	42
Individually evaluated for impairment - with an allowance	$	222		$	230
Collectively evaluated for impairment	7,534			8,190
Recorded Investment in Conventional MPF Loans	$	7,756		$	8,420

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 or disclosed as troubled debt restructurings.

20

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.

	March 31, 2013									December 31, 2012
As of	Conventional			Government			Total			Conventional			Government			Total
Past due 30-59 days	$	191		$	114		$	305		$	180		$	116		$	296
Past due 60-89 days	56			31			87			59			42			101
Past due 90 days or more	248			197			445			254			208			462
Total past due	495			342			837			493			366			859
Total current	7,261			1,644			8,905			7,927			1,741			9,668
Total recorded investment	$	7,756		$	1,986		$	9,742		$	8,420		$	2,107		$	10,527
In process of foreclosure	$	141		$	74		$	215		$	149		$	76		$	225
Serious delinquency rate a	3.21		%	9.95		%	4.58		%	3.03		%	9.86		%	4.40		%
Past due 90 days or more still accruing interest b	$	69		$	198		$	267		$	67		$	208		$	275
On nonaccrual status	$	226		$	—		$	226		$	234		$	—		$	234

^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

Effective December 31, 2012, we began characterizing MPF Loans as troubled debt restructurings in cases where they were discharged under Chapter 7 bankruptcy and they were not reaffirmed by the borrower, except for cases in which we expect to collect the recorded investment in full because of credit enhancements or government insurance or guarantees. We did not previously report these MPF Loans as troubled debt restructurings unless they were modified under our troubled debt restructuring modification program. In prior reporting periods, we reported these MPF Loans on nonaccrual status within 60 days of receipt of the notification of filing from the bankruptcy court. Further, we continue to include the recorded investment of these MPF Loans in our nonaccrual status reported amount, which means these MPF Loans are included in both categories for footnote disclosure purposes.

In the event a borrower qualifies for a troubled debt restructuring under our program, we 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.

The table below presents our recorded investment balance in troubled debt restructured loans as of the dates presented. The recorded investment balances for modified loans still in their trial period were immaterial. Performing includes modified loans that are accruing interest. Nonperforming includes modified loans that are on nonaccrual status.

	March 31, 2013						December 31, 2012
As of	Performing		Nonperforming		Total		Performing		Nonperforming		Total
Recorded investment in conventional MPF Loan TDRs	$	16	$	17	$	33	$	14	$	3	$	17

Our pre- and post-modification recorded investment in troubled debt restructurings during the quarter ended March 31, 2013, was $7 million and during the quarter ended March 31, 2012, was $1 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. Specifically, the modified terms do not fully take effect until after a three month trial period in which the borrower demonstrates

21

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

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

an ability to pay under the modified terms during the trial period; however, we consider the conventional MPF Loan a troubled debt restructuring at the inception of the trial period. If the borrower fails to pay during the trial period, the payment terms revert back to the original agreement with the borrower. 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 from the previous 12 months that subsequently defaulted during the three months ending March 31, 2013, and 2012 were $8 million and $1 million. A borrower is considered to have defaulted on a troubled debt restructuring if contractually due principal or interest payment is sixty days past due at any time during the past 12 months. The amount of nonperforming troubled debt restructurings are less than the amount that have subsequently defaulted either because a defaulted troubled debt restructuring subsequently became current or was transferred to REO.

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.

	March 31, 2013						December 31, 2012
As of	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
Impaired conventional MPF Loans with an allowance	$	222	$	217	$	30	$	230	$	224	$	30

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

	March 31, 2013				March 31, 2012
For the periods ended	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Three months	$	224	$	—	$	202	$	2

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.

22

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 to the financial statements in our 2012 Form 10-K for our accounting policies for derivatives.

In December of 2011, and as amended in January 2013, the FASB issued new disclosure requirements pertaining to offsetting (netting) of assets and liabilities. We adopted these new disclosure requirements retrospectively for all comparative periods presented effective January 1, 2013. The requirements require disclosure of both gross information and net information related to only derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing regardless of whether we offset these transactions in our statement of condition. A description of the rights of setoff related to these financial instruments, including the nature of those rights, also are required to be disclosed. We do not have repurchase agreements and reverse repurchase agreements or securities borrowing and securities lending transactions that are subject to offset in our statement of condition. As a result, we are only providing the required disclosures related to derivative instruments, which can be found below.

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 18 - Fair Value Accounting to the financial statements in our 2012 Form 10-K 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 $69 million of collateral at fair value to our derivatives counterparties at March 31, 2013.

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.

23

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. As of March 31, 2013, we delivered $1 million excess collateral on derivative liabilities. Netting adjustments represent the effect of legally enforceable master netting agreements that allow us to settle positive and negative positions.

	March 31, 2013									December 31, 2012
As of	Notional Amount		Derivative Assets				Derivative Liabilities			Notional Amount		Derivative Assets				Derivative Liabilities
Derivatives in hedge accounting relationships-
Interest rate swaps	$	27,746	$	86			$	1,985		$	24,678	$	103			$	2,107
Total	27,746		86				1,985			24,678		103				2,107
Derivatives not in hedge accounting relationships-
Interest rate swaps	15,004		650				572			13,352		691				656
Interest rate swaptions	5,510		139				—			8,690		160				—
Interest rate caps or floors	1,913		203				—			1,913		223				—
Mortgage delivery commitments	757		10				10			992		15				15
Total	23,184		1,002				582			24,947		1,089				671
Total before adjustments	$	50,930	1,088				2,567			$	49,625	1,192				2,778
Netting adjustments			(1,030		)		(1,030		)			(1,120		)		(1,120		)
Exposure at fair value			58			a	1,537					72			a	1,658
Cash collateral and related accrued interest			(16		)		(1,458		)			(25		)		(1,576		)
Derivative assets and liabilities			$	42			$	79				$	47			$	82

^a  Includes net accrued interest receivable of $8 million as of March 31, 2013, and $1 million as of December 31, 2012.

The following table shows the offsetting of derivative assets and liabilities for derivative instruments with legal right of offset as well as derivative instruments without the legal right of offset (i.e., mortgage delivery commitments):

	March 31, 2013						December 31, 2012
As of	Derivative Assets			Derivative Liabilities			Derivative Assets			Derivative Liabilities
Gross recognized amount	$	1,078		$	2,557		$	1,177		$	2,763
Gross amounts of netting adjustments and cash collateral	(1,046		)	(2,488		)	(1,145		)	(2,696		)
Net amounts after offsetting adjustments	32			69			32			67
Derivatives without legal right of offset	10			10			15			15
Total derivatives recorded in Statements of Condition	42			79			47			82
Noncash collateral received or pledged and not offset-
Cannot be sold or repledged	30			—			30			—
Net unsecured amount	$	12		$	79		$	17		$	82

24

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

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

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

	Three months ended March 31,
For the periods ending	2013			2012
Fair value hedges -
Interest rate swaps	$	2		$	4
Other	—			1
Fair value hedges - ineffectiveness net gain (loss)	2			5
Cash flow hedges - ineffectiveness net gain (loss)	1			2
Economic hedges -
Interest rate swaps	11			(2		)
Interest rate swaptions	(6		)	—
Interest rate caps/floors	(19		)	(13		)
Net interest settlements	13			19
Economic hedges - net gain (loss)	(1		)	4
Net gains (losses) on derivatives and hedging activities	$	2		$	11

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 Ineffectiveness Gain (Loss) Recognized in Derivatives and Hedging Activities			Net Interest Settlements Effect on Net Interest Income a			Hedge Adjustments Amortized into Net Interest Income b
Three months ended March 31, 2013
Hedged item type -
Available-for-sale securities	$	56		$	(55	)	$	1		$	(34	)	$	—
Advances	26			(23		)	3			(17		)	(1		)
MPF Loans held for portfolio	—			—			—			—			(10		)
Consolidated obligation bonds	(87		)	85			(2		)	47			(7		)
Total	$	(5	)	$	7		$	2		$	(4	)	$	(18	)
Three months ended March 31, 2012
Hedged item type -
Available-for-sale securities	$	36		$	(34	)	$	2		$	(32	)	$	—
Advances	8			(5		)	3			(24		)	(23		)
MPF Loans held for portfolio	(1		)	2			1			(1		)	(14		)
Consolidated obligation bonds	(24		)	23			(1		)	38			(9		)
Total	$	19		$	(14	)	$	5		$	(19	)	$	(46	)

^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.

25

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.

	Amortization of 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		Change in OCI			Net Interest Settlements Effect on Net Interest Income a
Three months ended March 31, 2013
Advances - interest rate floors	$	3		$	—	$	3		$	—	$	(3	)	$	—
Discount notes - interest rate swaps	(1		)	1		—			88		88			(67		)
Total	$	2		$	1	$	3		$	88	$	85		$	(67	)
Three months ended March 31, 2012
Advances - interest rate floors	$	4		$	—	$	4		$	—	$	(4	)	$	—
Discount notes - interest rate caps	(2		)	—		(2		)	—		2			—
Discount notes - interest rate swaps	(1		)	2		1			52		51			(67		)
Bonds - interest rate swaps	(2		)	—		(2		)	—		2			—
Total	$	(1	)	$	2	$	1		$	52	$	51		$	(67	)

^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.

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 March 31, 2013. 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 7 years.

26

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 March 31, 2013	Contractual Maturity		Weighted Average Interest Rate		Next Maturity or Call Date
Due in one year or less	$	7,096	2.83	%	$	22,306
One to two years	4,491		4.24	%	4,941
Two to three years	2,621		2.72	%	1,896
Three to four years	2,663		4.16	%	2,143
Four to five years	4,706		2.56	%	2,276
Thereafter	13,342		2.19	%	1,357
Total par value	$	34,919	2.82	%	$	34,919

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 March 31, 2013	$	24,292	$	24,298	0.13	%
As of December 31, 2012	31,260		31,269		0.13	%

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

As of	March 31, 2013			December 31, 2012
Noncallable	$	18,669		$	19,179
Callable	16,250			13,480
Total par value	34,919			32,659
Bond premiums (discounts), net	14			13
Hedging adjustments	(182		)	(104		)
Fair value option adjustments	—			1
Total consolidated obligation bonds	$	34,751		$	32,569

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 13 - Subordinated Notes to the financial statements in our 2012 Form 10-K.

27

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

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

Note 12 – Capital Stock and Mandatorily Redeemable Capital Stock

Capital Rules

Under our Capital Plan 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-54 in our 2012 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.

During the three months ended March 31, 2013, we repurchased excess capital stock totaling $100 million. Our plan for repurchasing the excess capital stock of current members over a period of time (Repurchase Plan) which we implemented in connection with our capital plan, terminated by its terms in May 2012. However, pursuant to a resolution adopted by our Board of Directors as discussed in Note 14 - Regulatory Actions to the financial statements in our 2012 Form 10-K, we continue to repurchase excess capital stock held by members on a quarterly basis if we maintain compliance with the financial and capital thresholds set forth in the Repurchase Plan both prior to and following the repurchase.

On April 15, 2013, following our assessment that we met the thresholds for repurchase based on the financial results for the first quarter of 2013, we notified members of another repurchase opportunity and the process for requesting repurchase. In accordance with that process, we announced our plan to repurchase excess capital stock of up to $200 million on May 15, 2013, which represents approximately all of the excess capital stock outstanding.

Capital Concentration

As of March 31, 2013, BMO Harris Bank N.A. held $210 million, or 14%, of our total capital stock outstanding. No other members had capital stock exceeding 10%.

Minimum Capital Requirements

For details on our minimum capital requirements, see Minimum Capital Requirements after Conversion to New Capital Structure on page F-55 of our 2012 Form 10-K. We complied with our minimum regulatory capital requirements as shown below:

	March 31, 2013						December 31, 2012
	Requirement			Actual			Requirement			Actual
Risk-based capital	$	1,413		$	3,323		$	1,545		$	3,347
Total regulatory capital	$	2,597		$	3,323		$	2,783		$	3,347
Total regulatory capital ratio	4.00		%	5.12		%	4.00		%	4.81		%
Leverage capital	$	3,246		$	4,984		$	3,479		$	5,021
Leverage capital ratio	5.00		%	7.68		%	5.00		%	7.22		%

Total regulatory capital and leverage capital do not include accumulated other comprehensive income (loss). Under the FHFA regulation on capital classifications and critical capital levels for the FHLBs, we are adequately capitalized.

Mandatorily Redeemable Capital Stock

We reclassify capital stock from equity to mandatorily redeemable capital stock (MRCS) in our Statements of Condition and Statements of Cash Flows under conditions as further described in Mandatorily Redeemable Capital Stock on page F-56 in our 2012 Form 10-K.

28

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

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

Note 13 - Accumulated Other Comprehensive Income (Loss)

AOCI Reclassification Disclosures

In February of 2012, the FASB amended existing accounting guidance to enhance the transparency of reporting amounts reclassified out of AOCI into net income. We adopted this amended guidance on a prospective basis effective January 1, 2013. The effects on the line items of net income of significant amounts reclassified out of AOCI in their entirety within the same reporting are presented below. Additionally, cross-references to other disclosures currently required for other reclassification items that are not required to be reclassified directly to net income in their entirety in the same reporting period also are presented below. The amendments do not change the current requirements for reporting net income or other comprehensive income. As a result, the amendments did not have any effect on our operating activities or financial statements at the time of adoption.

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, 2011	$	1,113		$	(26	)	$	(5	)	$	(466	)	$	(1,049	)	$	2	$	(431	)
Net change in the period	(32		)	5			1			19			51			—		44
Balance, March 31, 2012	$	1,081		$	(21	)	$	(4	)	$	(447	)	$	(998	)	$	2	$	(387	)
Balance, December 31, 2012	$	1,576		$	(8	)	$	(3	)	$	(381	)	$	(1,078	)	$	1	$	107
Change in the period before reclassifications to net income	(85		)	6			—			15			88			—		24
Period amounts reclassified from other comprehensive income (loss) to net income	—			—			1			—			(3		)	1		(1		)
Net change in the period	(85		)	6			1			15			85			1		23
Balance, March 31, 2013	$	1,491		$	(2	)	$	(2	)	$	(366	)	$	(993	)	$	2	$	130

The following table shows the amounts reclassified from AOCI to net income for the periods presented:

Three months ended March 31,	2013			Income Statement Location
Net unrealized gain (loss) on held-to-maturity securities a
Reclassification to net income	$	1		Interest income - HTM securities
Net unrealized gain (loss) on hedging activities
Reclassification of net realized (gains) losses to net income	(2		)	Net interest income
Reclassification of net realized (gains) losses to net income	(1		)	Non-interest gain (loss) - Derivatives and hedging activities
Post retirement plans - reclassification to net income	1			Non-interest expense - Compensation and benefits
Total other comprehensive income	$	(1	)

^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.

29

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

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

Note 14- Fair Value Accounting

Fair Value Measurement

For our accounting policies regarding fair values see Note 2 - Summary of Significant Accounting Policies to the financial statements in our 2012 Form 10-K.

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 18 - Fair Value Accounting to the financial statements in our 2012 Form 10-K. There have been no significant changes in our valuation techniques since then.

Financial instruments carried at fair value in our statements of condition using Level 3 significant inputs were immaterial at March 31, 2013.

30

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. 

	March 31, 2013
			Fair Value
	Carrying  Value		Total		Level 1		Level 2			Level 3			Netting Adjustment/ Cash Collateral a
Financial Assets
Cash and due from banks	$	442	$	442	$	442	$	—		$	—		$	—
Federal Funds sold	926		926		—		926			—			—
Securities purchased under agreements to resell	5,835		5,835		—		5,835			—			—
Trading securities	1,976		1,976		—		1,976			—			—
Available-for-sale securities	23,004		23,004		—		22,931			73			—
Held-to-maturity securities	8,397		9,309		—		7,540			1,769			—
Advances	14,403		14,663		—		14,663			—			—
MPF Loans held in portfolio, net	9,653		10,395		—		10,190			205			—
Accrued interest receivable	106		106		—		106			—			—
Derivative assets	42		42		—		1,061		b	27		b	(1,046		)
Financial Liabilities
Deposits	$	819	$	819	$	—	$	819		$	—		$	—
Consolidated obligations -
Discount notes	24,292		24,292		—		24,292			—			—
Bonds	34,751		36,320		—		36,244			76		c	—
Accrued interest payable	287		287		—		287			—			—
Mandatorily redeemable capital stock	4		4		4		—			—			—
Derivative liabilities	79		79		—		2,567			—			(2,488		)
Subordinated notes	1,000		1,155		—		1,155			—			—

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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.

31

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

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

	December 31, 2012
			Fair Value
	Carrying  Value		Total		Level 1		Level 2			Level 3			Netting Adjustment/ Cash Collateral a
Financial Assets
Cash and due from banks	$	3,564	$	3,564	$	3,564	$	—		$	—		$	—
Securities purchased under agreements to resell	6,500		6,500		—		6,500			—			—
Trading securities	1,229		1,229		—		1,229			—			—
Available-for-sale securities	23,454		23,454		—		23,385			69			—
Held-to-maturity securities	9,567		10,482		—		8,706			1,776			—
Advances	14,530		14,802		—		14,802			—			—
MPF Loans held in portfolio, net	10,432		11,227		—		11,015			212			—
Accrued interest receivable	116		116		—		116			—			—
Derivative assets	47		47		—		1,160		b	32		b	(1,145		)
Financial Liabilities
Deposits	$	816	$	816	$	—	$	816		$	—		$	—
Consolidated obligations -
Discount notes	31,260		31,262		—		31,262			—			—
Bonds	32,569		34,323		—		34,241			82		c	—
Accrued interest payable	156		156		—		156			—			—
Mandatorily redeemable capital stock	6		6		6		—			—			—
Derivative liabilities	82		82		—		2,778			—			(2,696		)
Subordinated notes	1,000		1,162		—		1,162			—			—

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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.

32

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 March 31, 2013	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	1,868			$	—			$	—		$	1,868
GSE residential MBS	—		106				—				—			106
Governmental-guaranteed residential MBS	—		2				—				—			2
Total Trading Securities	—		1,976				—				—			1,976
AFS securities:
U.S. Government & other government related	—		706				—				—			706
FFELP ABS	—		7,290				—				—			7,290
GSE residential MBS	—		12,019				—				—			12,019
Government-guaranteed residential MBS	—		2,916				—				—			2,916
Private-label residential MBS	—		—				73				—			73
Total AFS Securities	—		22,931				73				—			23,004
Advances	—		9				—				—			9
Derivative assets	—		1,061			b	27			b	(1,046		)	42
Total assets at fair value	$	—	$	25,977			$	100			$	(1,046	)	$	25,031
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation discount notes	$	—	$	(75	)		$	—			$	—		$	(75	)
Consolidated obligation bonds	—		(1,250		)		(76		)	c	—			(1,326		)
Derivative liabilities	—		(2,567		)	b	—				2,488			(79		)
Total liabilities at fair value	$	—	$	(3,892	)		$	(76	)		$	2,488		$	(1,480	)
Level 3 as a percent of total liabilities at fair value							5.1		%

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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.

33

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, 2012	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	1,106			$	—			$	—		$	1,106
GSE residential MBS	—		120				—				—			120
Governmental-guaranteed residential MBS	—		3				—				—			3
Total Trading Securities	—		1,229				—				—			1,229
AFS securities:
U.S. Government & other government related	—		754				—				—			754
FFELP ABS	—		7,453				—				—			7,453
GSE residential MBS	—		12,228				—				—			12,228
Government-guaranteed residential MBS	—		2,950				—				—			2,950
Private-label residential MBS	—		—				69				—			69
Total AFS Securities	—		23,385				69				—			23,454
Advances	—		9				—				—			9
Derivative assets	—		1,160			b	32			b	(1,145		)	47
Total assets at fair value	$	—	$	25,783			$	101			$	(1,145	)	$	24,739
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation bonds	—		(1,251		)		(82		)	c	—			(1,333		)
Derivative liabilities	—		(2,778		)	b	—				2,696			(82		)
Total liabilities at fair value	$	—	$	(4,029	)		$	(82	)		$	2,696		$	(1,415	)
Level 3 as a percent of total liabilities at fair value							5.8		%

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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.

34

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
For the three months ended March 31, 2013
Balance at beginning of period	$	69		$	32		$	(82	)
Gains (losses) realized and unrealized:
Change in fair value recorded in earnings - Instruments held under fair value option	—			—			6
Recorded in earnings in interest income	1			—			—
Change in fair value recorded in OCI - Non-credit OTTI on AFS securities	6			—			—
Change in fair value recorded in earnings - Derivatives and hedging activities	—			(5		)	—
Paydowns and settlements	(3		)	—			—
Balance at end of period	$	73		$	27		$	(76	)
Total unrealized gains (losses) recorded in earnings (derivatives and hedging activities) and attributable to instruments still held at period end	$	—		$	—		$	5
For the three months ended March 31, 2012
Balance at beginning of period	$	63		$	37		$	(87	)
Gains (losses) realized and unrealized:
Change in fair value recorded in earnings - Derivatives and hedging activities	—			(5		)	5
Change in fair value recorded in OCI - Non-credit OTTI on AFS securities	5			—			—
Paydowns and settlements	(2		)	—			—
Balance at end of period	$	66		$	32		$	(82	)
Total unrealized gains (losses) recorded in earnings (derivatives and hedging activities) and attributable to instruments still held at period end	$	—		$	(5	)	$	5

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.

	March 31, 2013						December 31, 2012
	Level 1		Level  2		Level  3		Level 1		Level  2		Level  3
Impaired MPF Loans	$	—	$	—	$	205	$	—	$	—	$	212
Real estate owned	—		—		13		—		—		18
Total non-recurring assets	$	—	$	—	$	218	$	—	$	—	$	230

35

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: 

	March 31, 2013								March 31, 2012
			Consolidated Obligation								Consolidated Obligation
	Advances		Bonds			Discount Notes			Advances		Bonds			Discount Notes
For the three months ended
Balance beginning of period	$	9	$	(1,251	)	$	—		$	9	$	(2,631	)	$	(11,466	)
New transactions elected for fair value option	—		(250		)	(75		)	—		(2,325		)	—
Maturities and extinguishments	—		250			—			—		1,820			2,200
Net gain (loss) on instruments held at fair value	—		1			—			—		4			2
Change in accrued interest and other	—		—			—			—		—			(4		)
Balance end of period	$	9	$	(1,250	)	$	(75	)	$	9	$	(3,132	)	$	(9,268	)

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.

	March 31, 2013						December 31, 2012
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	1,250		1,250		—		1,250		1,251		1
Consolidated obligation discount notes	75		75		—		—		—		—

36

Federal Home Loan Bank of Chicago

Notes to Financial Statements - (Unaudited)

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

Note 15 – Commitments and Contingencies

The table below shows our commitments outstanding but not yet incurred or recorded in our statements of condition. Except for an immaterial amount of MPF Loans being acquired for our portfolio under our affordable housing program, the mortgage purchase commitments in the below table will be concurrently resold to Fannie Mae under our MPF Xtra product.

As of	March 31, 2013						December 31, 2012
	Expire within one year		Expire after one year		Total		Expire within one year		Expire after one year		Total
Unsettled consolidated obligation bonds	$	2,398	$	—	$	2,398	$	175	$	—	$	175
Member standby letters of credit	857		757		1,614		689		725		1,414
Housing authority standby bond purchase agreements	16		350		366		50		382		432
MPF Program mortgage purchase commitments	379		—		379		497		—		497
Repurchasable loans and indemnifications to Fannie Mae for MPF Xtra loans a	45		—		45		39		—		39
Advance commitments	4		319		323		—		285		285
Total	$	3,699	$	1,426	$	5,125	$	1,450	$	1,392	$	2,842

^a  These contingent repurchase requests and indemnifications are classified in the expire within one year category since such repurchases and indemnifications are made upon request by Fannie Mae.  However, these contingent repurchase requests and indemnifications do not have an expiration date, and accordingly, our repurchases and indemnifications to Fannie Mae may occur after one year from the reporting date.

Note 16 – Transactions with Members and Other FHLBs

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 and the MPF Program almost exclusively with members. Therefore, in the normal course of business, we extend credit to members whose officers and directors may serve as our directors. We extend credit to them on market terms that are no more favorable than the terms of comparable transactions with other members who are not considered related parties (as defined above). In addition, we may purchase short-term investments, sell Federal Funds to, and purchase MBS from members (or affiliates of members) whose officers or directors serve as our directors. All such investments are market rate transactions and all such MBS are purchased through securities brokers or dealers. As an additional service to our members, including those whose officers or directors serve as our directors, we may enter into interest rate derivatives with members and offset these derivatives with non-member counterparties. These transactions 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.

	March 31, 2013		December 31, 2012
Assets - Advances	$	2,513	$	2,500
Liabilities - Deposits	117		106
Equity - Capital Stock	226		239

Other FHLBs

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

37

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	March 31, 2013			December 31, 2012			September 30, 2012			June 30, 2012			March 31, 2012
Selected statements of condition data
Total investments a	$	40,138		$	40,750		$	41,301		$	40,336		$	40,182
Advances	14,403			14,530			13,531			15,797			14,739
MPF Loans held in portfolio	9,693			10,474			11,310			12,210			13,181
Allowance for credit losses	(40		)	(42		)	(44		)	(48		)	(49		)
Total assets	64,922			69,584			66,444			68,641			68,908
Consolidated obligations -
Discount notes	24,292			31,260			27,231			23,439			22,424
Bonds	34,751			32,569			33,366			39,872			41,048
Total consolidated obligations, net	59,043			63,829			60,597			63,311			63,472
Mandatorily redeemable capital stock	4			6			10			10			14
Capital stock	1,549			1,650			1,702			1,850			1,908
Total retained earnings	1,770			1,691			1,593			1,504			1,436
Accumulated other comprehensive income (loss)	130			107			37			(221		)	(387		)
Total capital	3,449			3,448			3,332			3,133			2,957
Other selected data at period end
MPF Xtra loan volume funded - total system	$	1,691		$	2,410		$	2,027		$	1,334		$	1,170
MPF Xtra loan volume funded - Chicago PFIs	834			1,200			1,044			709			683
MPF Xtra loans outstanding b	12,301			11,348			9,861			8,630			7,863
Regulatory capital to assets ratio c	5.12		%	4.81		%	4.97		%	4.90		%	4.87		%
Market value of equity to book value of equity	106		%	102		%	103		%	97		%	94		%
All FHLBs consolidated obligations outstanding (par)	$	665,975		$	687,902		$	674,487		$	685,195		$	658,015
Number of members	758			762			764			767			767
Total employees (full and part time)	336			329			318			312			301
Total investments as a percent of total assets	62		%	59		%	62		%	59		%	58		%
Advances as a percent of total assets	22		%	21		%	20		%	23		%	21		%
MPF Loans as a percent of total assets	15		%	15		%	17		%	18		%	19		%
Selected statements of income data
Net interest income before provision for credit losses	$	113		$	135		$	140		$	138		$	159
Provision for credit losses	—			1			—			2			6
OTTI (loss), credit portion	—			—			—			(14		)	(1		)
Other non-interest gain (loss) excluding OTTI	1			(2		)	(12		)	(13		)	7
Non-interest expense	25			21			28			32			30
Net income	80			100			90			69			116
Cash dividends	1			2			1			1			1
Selected annualized ratios and data
Return on average assets - Quarter	0.46		%	0.59		%	0.53		%	0.39		%	0.66		%
Return on average assets - Year to date	0.46		%	0.54		%	0.52		%	0.52		%	0.66		%
Return on average equity - Quarter	9.36		%	12.43		%	14.25		%	9.28		%	15.93		%
Return on average equity - Year to date	9.36		%	12.90		%	13.08		%	12.57		%	15.93		%
Average equity to average assets	4.96		%	4.74		%	3.71		%	4.21		%	4.11		%
Non-interest expense to average assets	0.15		%	0.12		%	0.16		%	0.18		%	0.17		%
Net yield on interest-earning assets	0.67		%	0.81		%	0.84		%	0.80		%	0.91		%
Return on average Regulatory Capital spread to three month LIBOR index	9.50		%	11.67		%	10.34		%	7.76		%	12.63		%
Dividend payout ratio	1.57		%	1.56		%	1.59		%	1.92		%	0.52		%

^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 8 in our 2012 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 12 - Capital Stock and Mandatorily Redeemable Capital Stock to the financial statements in this Form 10-Q.

38

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 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 our size 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;

39

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 statutory debt limit, 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 (Dodd-Frank 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 us 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 2012 Form 10-K on page 22.

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.

40

Federal Home Loan Bank of Chicago

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

Executive Summary

First Quarter 2013 Financial Highlights

• We recorded net income of $80 million for the first quarter of 2013, lower than the $116 million earned in the first quarter of 2012, but still a financially strong quarter and consistent with our plan to build a consistently profitable member-focused Bank while managing our level of risk.

• Advance prepayment fees (net of fair value hedge adjustments) were down dramatically from the same quarter one year ago: $5 million in 2013 compared to $26 million during the first quarter of 2012.

• We realized gains of $2 million on ourderivatives and hedging activities, compared to gains of $11 million during the first quarter of 2012. Our overall hedge costs remain low given the extended low rate environment.

• Due primarily to decreased losses on Real Estate Owned (REO) sales, which were affected by improving housing prices in many areas across the country, non-interest expenses decreased in the first quarter of 2013 to $25 million from $30 million in the first quarter of 2012.

• Advances outstanding at March 31, 2013, were $14.4 billion, almost equal to the $14.5 billion at year-end 2012 and $14.7 billion on March 31, 2012. Until the economy fully recovers, we expect member deposits to remain high and demand for advances to remain low. However, some members are positioning their balance sheets for the likely rise in interest rates that is expected to occur when the current Federal Reserve policies end. Forward-starting advances have been utilized by members as a funding option to accomplish this, as they provide interest rate protection without resulting in a current inflow of cash.

• MPF Loans held in portfolio declined slightly to $9.7 billion at March 31, 2013, from $10.4 billion at year-end. The steady reduction over the past few years is a direct result of our 2008 decision not to add MPF Loans to our balance sheet. However, the MPF Xtra product, where home loans are aggregated and sold to Fannie Mae, and which lets smaller lenders provide the same competitively priced loans as larger lenders while keeping the local touch their customers appreciate, continues to gain popularity. In the first quarter of 2013,MPF Xtraloan volume for the program overall was $1.7 billion compared to $1.2 billion in the first quarter of 2012. MPF Xtra loan volume for our PFIs alone was $834 million during the quarter compared to $683 million a year earlier. We expect overall growth to continue as the FHLB of Dallas recently joined the MPF Program to offer the MPF Xtra product.

• Total investment securities decreased 3% to $33.4 billion this quarter, reflecting our current investment restriction which limits our ability to acquire longer-term investments.

• Total assets fell $4.7 billion (7%) to $64.9 billion from $69.6 billion at year end. At the end of 2012, we increased our liquidity position in an effort to protect the cooperative against potential short-term future funding challenges posed by the political and economic climate; and as those concerns eased this quarter, we decreased our cash position to $442 million at March 31, 2013, from $3.6 billion at year end 2012.

• As a result of our strong net income, our retained earnings grew $79 million (net income of $80 million less $1 million of dividends) to $1.8 billion.

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

41

Federal Home Loan Bank of Chicago

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

Summary and Outlook

With the major effort of remediating conditions of the past behind us, today we are applying the same financial acumen and single-mindedness of purpose to build a member-focused Bank that delivers value in the form of customized advances, letters of credit, access to the secondary mortgage market, and support for affordable housing and economic development.

We have focused on building member awareness of the Bank and our capacity to be a strategic partner for our members who can use our scale, resources, and access to markets to leverage their capabilities and enhance their competitiveness. Over the course of 2013, we plan to continue our efforts in building the member-focused Bank by integrating our services, enhancing our automation, focusing our talent required to enhance the collateral capacity of our members, and innovating products and services that are designed to address needs identified by our members.

Among our key member-focused initiatives in 2013:

• Our Members and Markets team has renewed its efforts to consult with members on how they can use the Bank for primary funding needs as well as for liquidity purposes.

• Completion of our plan to repurchase up to $200 million in excess capital stock on May 15, 2013, which represents approximately all of the excess capital stock outstanding, positions us to begin differentiating the dividends as permitted under our capital plan with a goal of encouraging members to increase advance borrowings.

• Implementation of the Community First Fund, a $50 million revolving loan fund designed to support affordable housing and economic development in Illinois and Wisconsin.

• Realization that the Bank must become more nimble in light of an increasingly dynamic economic environment, an important part of which is making it easier for members to access and utilize our products and services. We are working on several initiatives to help achieve this goal.

42

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 48. 

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

	March 31, 2013						March 31, 2012						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	$	11,315	$	4	0.14	%	$	4,559	$	2	0.18	%	$	3		$	(1	)	$	2
Investment securities	32,439		245		3.02	%	36,934		296		3.21	%	(36		)	(15		)	(51		)
Advances	13,883		41		1.19	%	14,963		74		1.98	%	(5		)	(28		)	(33		)
MPF Loans held in portfolio	9,853		113		4.59	%	13,350		153		4.58	%	(40		)	—			(40		)
Total Interest Income on Assets	67,490		403		2.39	%	69,806		525		3.01	%	(78		)	(44		)	(122		)
Consolidated obligation discount notes	29,325		77		1.05	%	26,581		76		1.14	%	8			(7		)	1
Consolidated obligation bonds	33,891		199		2.35	%	38,769		276		2.85	%	(35		)	(42		)	(77		)
Subordinated notes	1,000		14		5.60	%	1,000		14		5.60	%	—			—			—
Total Interest Expense on Liabilities	64,216		290		1.81	%	66,350		366		2.21	%	(27		)	(49		)	(76		)
Net yield on interest-earning assets	$	67,490	$	113	0.67	%	$	69,806	$	159	0.91	%	$	(51	)	$	5		$	(46	)

43

Federal Home Loan Bank of Chicago

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

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 as a result of purchasing shorter term lower yielding trading securities. 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, see Investments on page 12 in our 2012 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 yield on advances as advance prepayment fees, a component of advance interest income, declined to $5 million from $26 million a year ago. We recognized increased prepayment fee income in 2012, primarily attributable to members electing to restructure their outstanding advances to take advantage of the extended low interest rate environment. 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 immaterial amounts of government MPF Loans that primarily support affordable housing programs. We expect these trends to continue.

• The decline in interest income was partially offset by the reduction in interest expense on our consolidated obligations. This reduction resulted in part from a significant amount of 10 year debt that matured that had higher interest rates than current market rates. We were able to fund more of our balance sheet with shorter term consolidated obligation discount notes at lower interest rates.

Net interest income is 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. For further details see the tables of Trading Securities, Derivatives and Hedging Activities, and Instruments Held at Fair Value Option in the following section.

Non-Interest Gain (Loss)

	Three months
For the periods ended March 31,	2013			2012
OTTI impairment charges, credit portion	$	—		$	(1	)
Trading securities	(6		)	(14		)
Derivatives and hedging activities	2			11
Instruments held at fair value option	1			6
Other, net	4			4
Total non-interest gain (loss)	$	1		$	6

OTTI impairment charges, credit portion

The amount of additional impairment charges has declined as the economic conditions, and thus the significant inputs used to value our securities, have been relatively stable from the fourth quarter of 2011 through the first quarter of 2013. 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 Critical Accounting Policies and Estimates on page 52 for a discussion on the sensitivity of OTTI to significant inputs based on an adverse case scenario.

44

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 March 31, 2013
Amortization/accretion of hedging activities	$	2		$	—		$	(10	)	$	(1	)	$	(7	)	$	(16	)
Net interest settlements a	(17		)	(34		)	—			(67		)	47			(71		)
Total recorded in net interest income	(15		)	(34		)	(10		)	(68		)	40			(87		)
Fair value hedges	3			1			—			—			(2		)	2
Cash flow hedges	—			—			—			1			—			1
Economic hedges	—			—			(1		)	—			—			(1		)
Total in derivatives & hedging activities	3			1			(1		)	1			(2		)	2
Derivative related amounts recorded in non-interest gain (loss) on -
Trading securities - hedged	—			(4		)	—			—			—			(4		)
Instruments held under fair value option	—			—			—			—			1			1
Total net effect of hedging activities	$	(12	)	$	(37	)	$	(11	)	$	(67	)	$	39		$	(88	)
Trading securities - unhedged				(2		)										(2		)
Total trading securities				$	(6	)										$	(6	)
Three months ended March 31, 2012
Amortization/accretion of hedging activities	$	(19	)	$	—		$	(14	)	$	(3	)	$	(11	)	$	(47	)
Net interest settlements a	(24		)	(32		)	(1		)	(67		)	38			(86		)
Total hedging activities recorded in net interest income	(43		)	(32		)	(15		)	(70		)	27			(133		)
Fair value hedges	3			2			1			—			(1		)	5
Cash flow hedges	—			—			—			2			—			2
Economic hedges	—			—			(2		)	6			—			4
Total recorded in derivatives and hedging activities	3			2			(1		)	8			(1		)	11
Derivative related amounts recorded in non-interest gain (loss) on -
Trading securities - hedged	—			(13		)	—			—			—			(13		)
Instruments held under fair value option	—			—			—			2			4			6
Total net effect of hedging activities	$	(40	)	$	(43	)	$	(16	)	$	(60	)	$	30		$	(129	)
Trading securities - unhedged				(1		)										(1		)
Total trading securities				$	(14	)										$	(14	)

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

Nearly all of our total net effect of hedging activities in the above table is from amortization/accretion of hedging activities and net interest settlements. This was 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. The total in derivative & hedging activities was immaterial as interest rate volatility was stable. Trading securities - hedged had a small loss as these securities were acquired at a premium. As these securities approach par value, the related premiums are expected to continue to be recognized as losses, although the rate of losses will decline as the securities approach par. Instruments held under fair value option was immaterial due to the stable interest rate environment.

45

Federal Home Loan Bank of Chicago

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

Non-Interest Expense

	Three months
For the periods ended March 31,	2013		2012
Compensation and benefits	$	14	$	15
Other operating expenses	9		9
FHFA	1		2
Office of Finance	1		1
Other	—		3
Total non-interest expense	$	25	$	30

The majority of decline in non-interest expense was caused by a decline in losses on REO sales, which was mainly the result of an improvement in housing prices being experienced in many areas.

Assessments

We continue to fund the Affordable Housing Program (AHP) program at a calculated rate of 10% percent of income before assessments.

Other Comprehensive Income

Total other comprehensive income decreased to $23 million during the first quarter of 2013, compared to $44 million during the first quarter of 2012. The decrease was primarily due to increased unrealized losses on our AFS securities portfolio. The increase in these unrealized losses was the result of a slight increase in market interest rates during the first of quarter of 2013 compared to the same period in 2012. This decrease was partially offset by an increase in unrealized gains on our cash flow hedges of our discount notes, also caused by the increase in market interest rates between the two periods.

On a cumulative basis, however, we still have substantial unrealized gains on our AFS securities portfolio. These unrealized gains would only be reclassified into net income if we sold our AFS securities. If we hold these AFS securities to maturity, the unrealized gains would reverse to zero within total other comprehensive income.

We also recorded accretion of the non-credit portion of other-than-temporary impairment on our held-to-maturity securities. Since the non-credit portion of the losses was due to non credit-related declines, as these securities approach maturity or increase in fair value, these unrealized losses are expected to ultimately reverse, barring any further impairment.

46

Federal Home Loan Bank of Chicago

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

Statements of Condition

	March 31, 2013		December 31, 2012
Cash and due from banks	$	442	$	3,564
Securities purchased under agreement to resell	5,835		—
Federal Funds sold	926		6,500
Investment securities	33,377		34,250
Advances	14,403		14,530
MPF Loans held in portfolio, net	9,653		10,432
Other	286		308
Total assets	$	64,922	$	69,584
Consolidated obligation discount notes	$	24,292	$	31,260
Consolidated obligation bonds	34,751		32,569
Subordinated notes	1,000		1,000
Other	1,430		1,307
Total liabilities	61,473		66,136
Capital stock	1,549		1,650
Total retained earnings	1,770		1,691
Accumulated other comprehensive income (loss)	130		107
Total capital	3,449		3,448
Total liabilities and capital	$	64,922	$	69,584

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.

At the end of 2012, we increased our liquidity position in an effort to protect against potential short-term funding challenges posed by the political and economic climate.

Overnight rates for Federal Funds sold and securities purchased under agreements to resell have remained low. In addition, as a result of the European debt crisis we have reduced our exposure to counterparties in certain countries; see Short-Term Investments Unsecured Credit Exposureon page 54 for further details.

Investment Securities

Investment securities overall 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 current investment securities portfolio was acquired as part of an asset replacement strategy completed in 2010 to transition our primary business to advances. In connection with the approval of our Capital Plan and termination of the Consent Cease and Desist Order, 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, see Investments on page 12 in our 2012 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.

47

Federal Home Loan Bank of Chicago

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

Advances

Advances have held relatively steady as members continue to report to us that they are highly liquid with deposits thus reducing demand for more advances. We continue to see inter-quarter fluctuations of advances outstanding to our five largest members, 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 March 31, 2013
BMO Harris Bank N.A.	$	2,375	17	%
State Farm Bank, F.S.B	1,500		11	%
Associated Bank, N.A.	1,275		9	%
The Northern Trust Company	1,265		9	%
Cole Taylor Bank	1,065		7	%
All other borrowers	6,757		47	%
Total par value	$	14,237	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	March 31, 2013			March 31, 2012
Net premium amortization	$	3		$	3
Net amortization of closed basis adjustments	9			11
As of	March 31, 2013			December 31, 2012
Net premium balance on MPF Loans	$	35		$	38
Cumulative basis adjustments closed portion	88			97
MPF Loans, unpaid principal balance	9,572			10,340
Premium balance as a percent of MPF Loans	0.37		%	0.36		%

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 Selected Financial Data on page 38.

48

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 March 31, 2013, 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 53 in our 2012 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 March 31, 2013, our overnight liquidity was $8.7 billion or 13% of assets, giving us an excess overnight liquidity of $6.4 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 March 31, 2013, we had excess liquidity of $21.2 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 $24.3 billion as of March 31, 2013.

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 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 26 in the Risk Factors section of our 2012 Form 10-K.

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 three months ended March 31, 2013, net cash provided (used) by operating activities was $311 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 and an increase in accrued interest payable.

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 three months ended March 31, 2013, net cash provided (used) by investing activities was $1.4 billion. This resulted primarily from principal collected on MPF Loans, and net proceeds from the maturities and paydowns of investment securities. 

Cash flows from financing activities

Our financing activities primarily reflect cash flows related to issuing and repaying consolidated obligations. For the three months ended March 31, 2013, net cash provided (used) in our financing activities was $(4.8) billion. This was primarily driven by pay downs of our consolidated obligation discount notes offset by increased issuances of our consolidated obligation bonds and the repurchase/redemption of our excess capital stock.

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

49

Federal Home Loan Bank of Chicago

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

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 three months ended March 31,	2013			2012
Discount notes	$	(6,971	)	$	(2,982	)
Bonds	2,264			1,182
Total consolidated obligations	$	(4,707	)	$	(1,800	)

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

	March 31, 2013									December 31, 2012
Par values as of	Bonds			Discount Notes			Total			Bonds			Discount Notes			Total
FHLB System	$	472,961		$	193,014		$	665,975		$	471,567		$	216,335		$	687,902
FHLB Chicago as primary obligor	34,919			24,298			59,217			32,659			31,269			63,928
As a percent of the FHLB System	7		%	13		%	9		%	7		%	14		%	9		%

Conditions in Financial Markets

The financial markets were fairly stable during the first quarter of 2013 despite a variety of U.S. political policy debates. Somewhat positive economic data drove U.S. Treasury rates generally higher and U.S. equity market indices to all time highs as market participants seemed more willing to take on risk.

The “fiscal cliff,” a combination of tax increases and automatic spending reductions, also known as “sequestration,” was partially averted during January 2013 with legislation that prevented income tax increases for those with incomes under $400,000 although payroll tax increases took place as scheduled. In addition, the statutory “debt ceiling” limit was temporarily raised until mid-May. The payroll tax increases which began to take effect in January and the automatic spending reductions which began to take effect at the beginning of March are expected to slow economic growth.

The Federal Reserve has indicated that it plans to maintain the Federal Funds rate at a range from zero to 0.25% as long as unemployment remains above 6.5% and inflation remains subdued. As part of its latest quantitative easing program, the Federal Reserve continued its $45 billion in open-ended purchases of Treasury securities as well as $40 billion in open-ended purchases of agency MBS in first quarter 2013.

At the end of 2012, we increased our liquidity position in an effort to protect against potential short-term funding challenges posed by the political and economic climate. As those concerns eased during the first quarter, we decreased our liquid assets consisting of cash and due from banks, Federal Funds sold, and securities purchased under agreements to resell by 28% to $7.2 billion at March 31, 2013, from $10.1 billion at year end 2012. To the extent that continuing Congressional debates about deficit reduction and the statutory debt limit adversely affect the financial markets, FHLB funding levels and costs may be impacted. However, we continued to have ready access to funding during the first quarter of 2013.

Capital Resources

Capital Rules and Minimum Capital Requirements

For a description of our current capital rules and minimum capital requirements, see Note 12 – Capital Stock and Mandatorily Redeemable Capital Stock 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.

50

Federal Home Loan Bank of Chicago

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

Capital Amounts

The following table presents our five largest holdings of regulatory capital stock and reconciles our capital reported in our statements of condition to the amount of capital stock reported for regulatory purposes. 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 March 31, 2013	Capital Stock					MRCS
BMO Harris Bank N.A.	$	210	14		%	$	—
The Northern Trust Company	135		9		%	—
Associated Bank, N.A.	82		5		%	—
State Farm Bank, F.S.B	75		5		%	—
Cole Taylor Bank	53		3		%	—
All other members	994		64		%	4
Total	$	1,549	100		%	$	4
	March 31, 2013		December 31, 2012			Change
Capital stock	$	1,549	$	1,650		$	(101	)
Total retained earnings	1,770		1,691			79
Total permanent capital	3,319		3,341			(22		)
Accumulated other comprehensive income (loss)	130		107			23
Total GAAP capital	$	3,449	$	3,448		$	1
Capital Stock	$	1,549	$	1,650		$	(101	)
MRCS	4		6			(2		)
Total retained earnings	1,770		1,691			79
Regulatory capital	$	3,323	$	3,347		$	(24	)

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 12 - Capital Stock and Mandatorily Redeemable Capital Stock to the financial statements.

• Total retained earnings increased due to our net income of $80 million less dividends paid of $1 million.

• Our unrealized income in AOCI increased due to several factors. For details see our Statements of Comprehensive Income on page 5.

Although we had no OTTI in the first quarter of 2013, 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 30 of the Risk Factors section of our 2012 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. As discussed in Note 14 - Regulatory Actions to the financial statements in our 2012 Form 10-K, dividends paid for any given quarter of 2013 must not exceed the following rates on an annualized basis: (1) the average of three-month LIBOR plus 350 basis points on Class B-1 capital stock, and (2) the average of three-month LIBOR plus 100 basis points on Class B-2 capital stock. The Board has also resolved that payment of any dividend not result in our retained earnings falling below the level of retained earnings at the previous year-end. Our Board may not pay dividends above these limits or otherwise modify or terminate this resolution without written consent by the Director of the FHFA.

The repurchase opportunity for up to $200 million in excess capital stock announced on April 15, 2013, as further discussed in

Note 12 - Capital Stock and Mandatorily Redeemable Capital Stock to the financial statements, represents approximately all of the excess stock outstanding. Achieving this milestone positions us to begin differentiating the dividend paid on Class B-1 (activity) and Class B-2 (membership) as permitted under our capital plan with a goal of encouraging members to increase advance borrowings. Any future dividend payments are subject to our financial results and approval from our Board of Directors.

51

Federal Home Loan Bank of Chicago

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

On April 23, 2013, our Board declared a cash dividend at an annualized rate of 0.30% per share based on our preliminary financial results for the first quarter of 2013. Although we continue to work to build our financial strength to support a reasonable dividend, any future dividend determination by our Board will be at our Board's sole discretion and will depend on future operating results and any other factors the Board determines to be relevant, and be reviewed in accordance with the Board's resolution and our Retained Earnings and Dividend Policy.

On March 28, 2013, our Board of Directors amended our Retained Earnings and Dividend Policy to increase our retained earnings target in an effort to mitigate our repurchase risk that arises from obligations to third party investors for loans originated under the MPF Program. For further discussion of our repurchase liability, see page 31 in the Risk Factors section of our 2012 Form 10-K. For further information about our Retained Earnings and Dividend Policy, see Retained Earnings and Dividend Policy on page 62 in our 2012 Form 10-K.

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-56 in our 2012 Form 10-K.

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 2012 Form 10-K. 

Other-Than-Temporary Impairment (OTTI)	Page 65
Significant Inputs Used on all residential private-label MBS securities	Page 66
Estimating Fair Value	Page 66
Controls over Valuation Methodologies	Page 66
Controls over Third Party Pricing Services	Page 67
Fair Value Measurement Effect on Liquidity and Capital	Page 67
Allowance for Credit Losses - Conventional MPF Loan Assumptions	Page 67
Overnight Indexed Swaps (OIS)	Page 68

Significant changes in our critical accounting policies and estimates from our 2012 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 changes in accounting policies and recently issued accounting standards on our financial results.

Other-Than-Temporary Impairment (OTTI)

Adverse Case Scenario. In addition to evaluating our private-label MBS under a base case (or best estimate) scenario as discussed in Note 5 - Investment Securities to the financial statements, we performed a cash flow analysis for each of these securities under a more stressful housing price scenario. This more stressful scenario was based on a housing price forecast that was decreased 5 percentage points followed by a recovery path that is 33.0% lower than the base case.

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 March 31, 2013	# of Securities	Unpaid Principal Balance		Credit-Related OTTI		# of Securities	Unpaid Principal Balance		Credit- Related OTTI
Prime	—	$	—	$	—	6	$	139	$	(1	)
Subprime	—	—		—		9	112		(2		)
Total private-label MBS	—	$	—	$	—	15	$	251	$	(3	)

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

52

Federal Home Loan Bank of Chicago

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

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 March 31, 2013	Unpaid Principal Balance		Prepayment Rate Weighted Average %	Default Rates Weighted Average %	Loss Severity Weighted Average %	Credit Enhancement Weighted Average %
2006	$	751	8.6	27.5	42.0	0.3
2004 & prior	18		12.7	6.4	30.3	12.5
Total Prime	769		8.7	27.0	41.7	0.6
2006	637		7.9	42.8	50.1	1.2
2005	29		7.0	37.6	50.0	—
2004 & prior	2		11.7	28.3	34.1	25.6
Total Alt-A	668		7.8	42.5	50.1	1.2
2007	10		4.0	65.2	65.8	43.6
2006	828		3.9	69.0	66.9	21.9
2005	50		4.5	63.0	63.8	45.5
2004 & prior	15		7.3	27.4	65.3	40.9
Total Subprime	903		4.0	67.9	66.7	23.8
Total	2,340		6.6	47.2	53.7	9.7
Analyzed by alternative procedures	96
Total MBS	$	2,436

Supplement to Affordable Housing and Community Investment Programs

As previously disclosed in Note 12 - Assessments to the financial statements in our 2012 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. This charge was recognized as “Non-interest expense - Other community investment” in our 2011 Statement of Income.

Subsequent to the filing of our 2011 Form 10-K, we developed the Community First Fund, which is a framework for using these funds as part of a revolving loan fund, and submitted it to the FHFA for approval. In April of 2013, we received a letter from the FHFA approving the Community First Fund subject to certain supervisory conditions and further approval by our Board of Directors. Additionally, the FHFA lifted the original requirement to deploy the funds by the end of 2014. Specifically, the FHFA indicated that it would permit us to endeavor to deploy the funds by the end of 2014 but disburse funds after the end of 2014 provided it is due to reasons of prudence and safe and sound operations of the Community First Fund program. In April of 2013, our Board of Directors approved the implementation of the Community First Fund. The approvals from the FHFA and our Board of Directors will result in us recognizing $50 million in earnings in the second quarter of 2013, which represents the reversal of the $50 million charge previously recognized in the fourth quarter of 2011. The $50 million reversal will be recognized through “Non-interest expense - Other community investment” in our second quarter 2013 Statement of Income. The reversal will not be included in our AHP assessment for 2013 since we added back the $50 million charge to income before assessments when we accrued our AHP assessment in 2011 - that is, we already have paid our AHP assessment attributable to the $50 million charge.

53

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 credit risk on advances plus risks in any of the other categories as described on page 69 in our December 31, 2012 Form 10-K. As of March 31, 2013, we had total credit risk concentrated with members with 10% or more of our total member credit outstanding as follows:

As of March 31, 2013	Total Member Credit Outstanding	% of Total
BMO Harris Bank N.A.	$2,375	15%
Associated Bank, N.A.	1,964	12%

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 49for 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 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 March 31, 2013, we had $2 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. We were in compliance with the regulatory limits established for our unsecured credit as of and for the periods presented.

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 or 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 counterparties and U.S. subsidiaries of foreign commercial banks include the risk that these counterparties have extended credit

54

Federal Home Loan Bank of Chicago

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

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 periods presented.

The following table presents the credit ratings of our 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 March 31, 2013	AAA		AA		A		BBB		Below Investment Grade		Unrated		Total
Domestic U.S.	$	—	$	1	$	—	$	—	$	—	$	—	$	1
U.S. branches and agency offices of foreign commercial banks:
Canada	—		—		925		—		—		—		925
Total unsecured credit exposure	$	—	$	1	$	925	$	—	$	—	$	—	$	926

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.

Investment Securities

In addition to private-label MBS, we also hold a variety of other investment securities we believe are low risk and mostly government backed or insured such as GSE debt, and FFELP ABS. There was no material change in the credit ratings of these AA or better rated securities since December 31, 2012, and except for private-label MBS as noted below, we have never taken an impairment charge on these securities. For further details see page 72 in our 2012 Form 10-K.

Our private label MBS are predominantly variable rate securities rated below investment grade BBB. There was no material change in overall credit quality since December 31, 2012, nor have we acquired any new private label MBS or had any other-than-temporary impairment (OTTI) to date in 2013. For further details see page 75 in our 2012 Form 10-K. The following table presents the components of amortized cost of our private label MBS and the life-to-date OTTI credit impairment taken at some point in time on these securities.

As of March 31, 2013	Unpaid Principal Balance	Life-To-Date OTTI Credit Impairment a	Other Adjustments b		Amortized Cost
Private label MBS	$2,436	$742	$	124	$1,818

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

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

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.

	March 31, 2013									December 31, 2012
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	431	86	%	$	15,183	94	%	$	36,520	453	87	%	$	14,573	92	%	$	36,671
4	29	6	%	303		2	%	765		26	5	%	718		4	%	1,255
5	41	8	%	635		4	%	1,129		43	8	%	715		4	%	1,320
Total	501	100	%	$	16,121	100	%	$	38,414	522	100	%	$	16,006	100	%	$	39,246

55

Federal Home Loan Bank of Chicago

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

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 company members we took delivery of collateral for all advances outstanding regardless of credit rating for the periods presented.

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 had one borrower placed into receivership by their regulator during the three months ended March 31, 2013, and at the time of failure their total advances outstanding were $3 million. All outstanding advances were either repaid or were assumed by the acquirer. No credit losses were incurred on these advances.

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 15 - 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 based on portfolio and market trends related to delinquency rates, loss severities, and prepayment speeds consistent with the percentages of delinquent, nonaccrual, and impaired MPF Loans to total conventional MPF Loans. Our provision declined during the first quarter of 2013 compared to 2012 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.

We are exposed to mortgage repurchase liability in connection with our sale of MPF Loans to Fannie Mae under the MPF Xtra product.  If a loan eligibility requirement or other warranty is breached, Fannie Mae could require us to repurchase an ineligible MPF Loan or provide an indemnity.  If the PFI from which we purchased an ineligible MPF Loan is viable, we can require the PFI to repurchase that MPF Loan from us or indemnify us for related losses.  PFIs are also required to repurchase ineligible MPF Loans we hold in our portfolio.  As of March 31, 2013, and December 31, 2012, we had in total $63 million and $58 million of unpaid principal balance for repurchase requests to and indemnifications outstanding from PFIs, which includes as of March 31, 2013, $45 million related to MPF Xtra loans and $18 million related to our MPF Loans held in portfolio, compared to $39 million and $19 million as of December 31, 2012.  Because repurchase requests from Fannie Mae may be made up until full repayment of a loan rather than when a purported defect is first identified, repurchase requests as of a particular date may not reflect total repurchase liability for loans outstanding as of that date.  Based on currently available information, we estimate that the Bank may have contingent repurchase requests from and indemnifications outstanding to Fannie Mae related to the remaining unpaid principal balance on MPF Xtra loans previously sold to Fannie Mae of $45 million at March 31, 2013 compared to $39 million at December 31, 2012.  We currently estimate a range of up to $23 million of reasonably possible repurchase liability related to these contingent repurchase requests and indemnifications, of which we do not expect to incur any losses as we estimate probable recoveries of the repurchase liability from PFIs.  Additional repurchase requests and indemnifications not yet identified may result from our quality assurance review of MPF Loans, as further discussed in Quality Assurance Process on page 10 in our 2012 Form 10-K.

In the latter part of 2012, in certain cases we identified negative trends of PFI non-compliance related to our existing portfolio of MPF Loans and repurchases of MPF Xtra loans. As a result, we revised our quality assurance practices to increase the number of loans reviewed and continue to evaluate our current practices relative to industry practices. Fannie Mae has also increased the number of loans reviewed as part of its quality assurance processes. Because of this increased number of loan files being reviewed, the number of defects identified may increase, resulting in an increased number of repurchase requests or indemnifications. However, some repurchase requests may not ultimately require us or the PFI to repurchase the loan because we and the PFI may be able to resolve the purported defect. In certain cases, we require PFIs to collateralize repurchase obligations and indemnifications given their credit condition and size of their repurchase obligation or indemnification.

We have not recorded a loss related to MPF Xtra repurchase requests or indemnifications, nor have we recorded an allowance for credit losses for repurchase requests or indemnifications related to MPF Loans held in our portfolio, as we do not expect to incur any losses. See Risk Factors on page 22 in our 2012 Form 10-K for further details.

56

Federal Home Loan Bank of Chicago

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

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 the periods presented, 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 by rating, plus derivatives with member institutions and MPF delivery commitments. Rating shown is the lowest rating among the three largest NRSROs. Of our net exposure after collateral, $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 March 31, 2013
A rated	$	31	$	30	$	1
Member institutions and MPF delivery commitments	11		—		11
Total derivatives	$	42	$	30	$	12
As of December 31, 2012
AA rated	$	1	$	—	$	1
A rated	31		30		1
Member institutions and MPF delivery commitments	15		—		15
Total derivatives	$	47	$	30	$	17

57

Federal Home Loan Bank of Chicago

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

Legislative and Regulatory Developments

Final Rule and Guidance on the Supervision and Regulation of Certain Nonbank Financial Companies. The Financial Stability Oversight Council (the Oversight Council) issued a final rule and guidance effective May 11, 2012 on the standards and procedures the Oversight Council employs in determining whether to designate a nonbank financial company for supervision by the Federal Reserve Board and to be subject to certain prudential standards. The guidance issued with this final rule provides that the Oversight Council expects generally to follow a three-stage process in making its determinations consisting of:

• A first stage that will identify those nonbank financial companies that have $50 billion or more of total consolidated assets and exceed any one of five threshold indicators of interconnectedness or susceptibility to material financial distress, including whether a company has $20 billion or more in total debt outstanding;

• A second stage involving a robust analysis of the potential threat that the subject nonbank financial company could pose to U.S. financial stability based on additional quantitative and qualitative factors that are both industry and company specific; and

• A third stage analyzing the subject nonbank financial company using information collected directly from it. The final rule provides that, in making its determinations, the Oversight Council will consider as one factor whether the nonbank financial company is subject to oversight by a primary financial regulatory agency (for the FHLBs, the FHFA). A nonbank financial company that the Oversight Council proposes to designate for additional supervision (for example, periodic stress testing) and prudential standards (such as heightened liquidity or capital requirements) under this rule has the opportunity to contest the designation. If we are designated by the Oversight Council for supervision by the Federal Reserve and subject to additional Federal Reserve prudential standards, then our operations and business could be adversely impacted by any resulting additional costs, liquidity or capital requirements, and/or restrictions on business activities.

On April 5, 2013, the Federal Reserve System published a final rule that establishes the requirements for determining when a company is “predominately engaged in financial activities." The final rule provides that a company is “predominantly engaged in financial activities” and thus a "nonbank financial company" if:

• as determined in accordance with applicable accounting standards, (i) the consolidated annual gross financial revenues of the company in either of its two most recently completed fiscal years represent 85% or more of the company's consolidated annual gross revenues in that fiscal year, or (ii) the company's consolidated total financial assets as of the end of either of its two most recently completed fiscal years represent 85% or more of the company's consolidated total assets as of the end that fiscal year; or

• based on all the facts and circumstances, it is determined by the Oversight Council, with respect to the definition of a “nonbank financial company,” or the Federal Reserve Board, with respect to the definition of a “significant nonbank financial company,” that (i) the consolidated annual gross financial revenues of the company represent 85 % or more of the company's consolidated annual gross revenues, or (ii) the consolidated total financial assets of the company represent 85% or more of the company's consolidated total assets.

Under the final rule, we would likely be a nonbank financial company.

The final rule also defines the term "significant nonbank financial company" to mean (i) any nonbank financial company supervised by the Federal Reserve Board; and (ii) any other nonbank financial company that had $50 billion or more in total consolidated assets as of the end of its most recently completed fiscal year. If we are designated for supervision by the Federal Reserve (and therefore a significant nonbank financial company), we would be subject to increased supervision and oversight and our operations and business could be adversely impacted by any resulting additional costs, liquidity or capital requirements, and/or restrictions on business activities.

Oversight Council Recommendations Regarding Money Market Mutual Fund (MMF) Reform. The Oversight Council requested comments on certain proposed recommendations for structural reforms of MMFs. The comment deadline was February 15, 2013. The Oversight Council stated that such reforms are intended to address the structural vulnerabilities of MMFs. The demand for FHLB System consolidated obligations may be impacted by the structural reform ultimately adopted. Accordingly, these reforms could cause our funding costs to rise or otherwise adversely impact market access and, in turn, adversely impact our results of operations.

Consumer Financial Protection Bureau (CFPB) Final Qualified Mortgage Rule. In January 2013, the CFPB issued a final rule with an effective date of January 10, 2014, that establishes new standards for mortgage lenders to follow during the loan approval process to determine whether a borrower can afford to repay certain types of loans, including mortgages and other loans secured by a dwelling. The final rule provides for a rebuttable "safe harbor" from consumer claims that a lender did not adequately consider whether a consumer can afford to repay the lender's mortgage, provided that the mortgage meets the requirements of a Qualified Mortgage loan (QM). QMs are home loans that are either eligible for purchase by Fannie Mae or

58

Federal Home Loan Bank of Chicago

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

Freddie Mac or otherwise satisfy certain underwriting standards. On May 6, 2013, the FHFA announced that Fannie Mae and Freddie Mac will no longer purchase a loan that is not a "QM" under those underwriting standards starting January 10, 2014. The underwriting standards require lenders to consider, among other factors, the borrower's current income, current employment status, credit history, monthly payment for mortgage, monthly payment for other loan obligations and the borrower's total debt-to-income ratio. Further, the QM underwriting standards generally prohibit loans with excessive points and fees, interest-only or negative-amortization features (subject to limited exceptions), or terms greater than 30 years. On the same date as it issued the final Ability to Repay/final QM standards, the CFPB also issued a proposal that would allow small creditors (generally those with assets under $2 billion) in rural or underserved areas to treat first lien balloon mortgage loans that they offer as QM mortgages. Comments were due by February 25, 2013. The QM liability safe harbor could provide incentives to lenders, including our members, to limit their mortgage lending to QMs or otherwise reduce their origination of mortgage loans that are not QMs. This approach could reduce the overall level of members' mortgage loan lending and, in turn, reduce demand for our advances. Additionally, the value and marketability of mortgage loans that are not QMs, including those pledged as collateral to secure member advances, may be adversely affected.

Basel Committee on Banking Supervision - Liquidity Framework. On January 6, 2013, the Basel Committee on Banking Supervision (the Basel Committee) announced amendments to the Basel liquidity standards, including the Liquidity Coverage Ratio (LCR). The amendments include the following: (1) revisions to the definition of high quality liquid assets (HQLA) and net cash outflows; (2) a timetable for phase-in of the standard; (3) a reaffirmation of the usability of the stock of liquid assets in periods of stress, including during the transition period; and (4) an agreement for the Basel Committee to conduct further work on the interaction between the LCR and the provision of central bank facilities. Under the amendment, the LCR buffer would be set at 60% of outflows over a 30-day period when the rule becomes effective in 2015, and then increase steadily until reaching 100% four years later. The definition of HQLA has been amended to expand the eligible assets, including residential mortgage assets. In late February, it was reported that the U.S. banking regulators expect to customize the Basel III liquidity rules and expect to issue their final rules later in 2013.

59

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 85 in our 2012 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 March 31, 2013
Advances	$	(3	)	$	—		$	—		$	(4	)	$	—
MPF Loans	(1		)	(3		)	(6		)	(2		)	2
Mortgage Backed Securities	(9		)	(1		)	(1		)	(10		)	—
Other interest earning assets	(1		)	—			—			(5		)	—
Interest-bearing liabilities	11			16			—			10			—
Derivatives	3			(12		)	—			—			—
Total	$	—		$	—		$	(7	)	n/m			$	2
As of December 31, 2012
Advances	$	(3	)	$	—		$	—		$	(4	)	$	—
MPF Loans	(2		)	(2		)	(6		)	(3		)	1
Mortgage Backed Securities	(9		)	(1		)	(2		)	(10		)	—
Other interest earning assets	(1		)	—			—			(5		)	—
Interest-bearing liabilities	10			8			—			9			—
Derivatives	5			(5		)	—			—			—
Total	$	—		$	—		$	(8	)	n/m			$	1

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 rates) – Change in market value for a one basis point increase in mortgage rates.

As of March 31, 2013, and December 31, 2012, our sensitivity to changes in implied volatility was nil. 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.

60

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 March 31, 2013			As of December 31, 2012
Down 200 bps	Base	Up 200 bps	Down 200 bps	Base	Up 200 bps
2.4	-0.9	-1.7	2.4	0.8	-3.5

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 March 31, 2013, our duration gap was -0.6 months, compared to 0.4 months as of December 31, 2012.

As of March 31, 2013, on a U.S. GAAP basis, our fair value surplus (relative to book value) was $194 million, and our market value of equity to book value of equity ratio was 106%. At December 31, 2012, our fair value surplus was $65 million and our market value of equity to book value of equity ratio was 102%. 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-55 in our 2012 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.

	March 31, 2013					December 31, 2012
Scenario as of	Change in Market Value of Equity		Loss Limit			Change in Market Value of Equity		Loss Limit
-200 bp	$	67.1	$	(185.0	)	$	115.2	$	(185.0	)
-100 bp	36.4		(77.5		)	72.4		(77.5		)
-50 bp	16.3		(30.0		)	42.5		(30.0		)
-25 bp	3.0		(15.0		)	19.8		(15.0		)
+25 bp	18.5		(30.0		)	6.7		(30.0		)
+50 bp	49.6		(60.0		)	28.6		(60.0		)
+100 bp	125.1		(155.0		)	107.4		(155.0		)
+200 bp	205.5		(370.0		)	248.5		(370.0		)

61

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 92 of our 2012 Form 10-K.

62

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 $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; 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 less than 1% of the Bank's capital stock as of March 31, 2013.  

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 was denied. Certain defendants also filed with the Circuit Court a Motion to Certify Questions of Law for Interlocutory Appeal and to Stay Discovery. This petition was also denied. 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 closed and oral argument on the motion is scheduled for May 2013. 

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 22 in our 2012 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.

63

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.

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

64

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.

Agency MBS: Mortgage-backed securities issued by, or comprised of mortgage loans guaranteed by, Fannie Mae or Freddie Mac.

AHP: Affordable Housing Program.

AOCI: Accumulated Other Comprehensive Income.

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

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.

Consolidated Obligations (CO): 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.

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.

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.

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

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

Freddie Mac: Federal Home Loan Mortgage Corporation.

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

Ginnie Mae: Government National Mortgage Association.

65

Federal Home Loan Bank of Chicago

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

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.

LIBOR: London Interbank Offered Rate.

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

MBS: Mortgage-backed securities.

Moody's: Moody's Investors Service.

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 to facilitate issuing and servicing of consolidated obligations.

OIS: Overnight Indexed Swap

OTTI: Other-than-temporary impairment.

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.

PMI: Primary Mortgage Insurance

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.

RHS: Department of Agriculture Rural Housing Service.

SMI: Supplemental mortgage insurance.

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

VA: Department of Veteran's Affairs.

66

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:	May 9, 2013	(Principal Executive Officer)
		/s/   Roger D. Lundstrom
		By:	Roger D. Lundstrom
		Title:	Executive Vice President and Chief Financial Officer
Date:	May 9, 2013	(Principal Financial Officer and Principal Accounting Officer)

S-1

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:	May 9, 2013	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:	May 9, 2013	By:	/s/ Roger D. Lundstrom
		Name:	Roger D. Lundstrom
		Title:	Executive Vice President and Chief Financial Officer
			(Principal Financial Officer and Principal Accounting 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 March 31, 2013 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:	May 9, 2013	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 March 31, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Roger D. Lundstrom, Executive Vice President 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:	May 9, 2013	By:	/s/ Roger D. Lundstrom
		Name:	Roger D. Lundstrom
		Title:	Executive Vice President and Chief Financial Officer
			(Principal Financial Officer and Principal Accounting 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 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Interest income -
Federal Funds sold	$ 1	$ 1
Securities purchased under agreements to resell	2	1
Interest bearing deposits	1	0
Investment securities -
Trading	6	17
Available-for-sale	149	165
Held-to-maturity	90	114
Total investment securities	245	296
Advances	36	48
Advances prepayment fees, net of fair value hedge adjustments of $0 and $(22)	5	26
Total Advances	41	74
MPF Loans held in portfolio, net	113	153
Total interest income	403	525
Consolidated obligations -
Discount notes	77	76
Bonds	199	276
Total consolidated obligations	276	352
Subordinated notes	14	14
Total interest expense	290	366
Net interest income before provision for credit losses	113	159
Provision for credit losses	0	6
Net interest income	$ 113	$ 153

XML

Allowance for Credit Losses MPF Risk Sharing Structure (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Severity Rate on MPF Loan Pool and Impaired Collateral Dependent MPF Loans	37.00%		38.00%
Weighted Average Credit Loss Severity Rate	21.00%		22.00%
Total Losses Outstanding on MPF Loans	$ 83		$ 88
Losses Expected to be Absorbed by MPF Risk Sharing Structure	(21)	[1]	(23)	[1]
Banks Share of Total Losses Related to MPF Loans	62		65
Non Credit Losses Related to REO	(27)	[1]	(27)
Financing Receivable, Allowance for Credit Losses	35		38
Remaining Portfolio, Allowance for Credit Losses	5		4
Loans and Leases Receivable, Allowance	$ 40		$ 42

[1] Represents aggregate of credit enhancements across all master commitments expected to be recovered. Credit enhancement from one master commitment may not be used to offset credit losses incurred by another master commitment.

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

Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	$ 107
Unrealized gains (losses)	(85)		(32)
Net change in fair value	6		5
Reclassification to net income	1	[1]	1	[1]
Accretion of non-credit portion to HTM asset	15		20
Unrealized gains (losses)	88		52
Reclassification of net realized (gains) losses to net income	(3)		(1)
Accumulated Other Comprehensive Income (Loss), Ending Balance	130
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	107		(431)
Other Comprehensive Income (Loss), Before Reclassifications, Portion Attributable to Parent	24
Other Comprehensive Income (Loss), Amounts Reclassified, Portion Attributable to Parent	(1)
Net Change in the Period	23		44
Accumulated Other Comprehensive Income (Loss), Ending Balance	130		(387)
Net Unrealized on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	(1,078)		(1,049)
Unrealized gains (losses)	88
Reclassification of net realized (gains) losses to net income	(3)
Net Change in the Period	85		51
Accumulated Other Comprehensive Income (Loss), Ending Balance	(993)		(998)
Post-Retirement Plans [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	1		2
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	1
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent	0
Net Change in the Period	1		0
Accumulated Other Comprehensive Income (Loss), Ending Balance	2		2
AFS Securities [Member] | Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	1,576		1,113
Unrealized gains (losses)	(85)
Reclassification of net realized (gains) losses to net income	0
Net Change in the Period	(85)		(32)
Accumulated Other Comprehensive Income (Loss), Ending Balance	1,491		1,081
AFS Securities [Member] | Non-credit OTTI [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	(8)		(26)
Net change in fair value	6
Reclassification of net non-credit portion to (from) statements of income	0
Net Change in the Period	6		5
Accumulated Other Comprehensive Income (Loss), Ending Balance	(2)		(21)
HTM Securities [Member] | Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	(3)		(5)
Unrealized gains (losses)	0
Reclassification to net income	1	[1]
Net Change in the Period	1		1
Accumulated Other Comprehensive Income (Loss), Ending Balance	(2)		(4)
HTM Securities [Member] | Non-credit OTTI [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	(381)		(466)
Accretion of non-credit portion to HTM asset	15
Reclassification of net non-credit portion to (from) statements of income	0
Net Change in the Period	15		19
Accumulated Other Comprehensive Income (Loss), Ending Balance	$ (366)		$ (447)

[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.

XML

Allowance for Credit Losses Allowance rollforward and loans evaluated for impairment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Allowance	$ 40		$ 42
Provision for credit losses	0	6
Financing Receivable, Gross	9,742		10,527
Conventional Mortgage Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Allowance	40	49	42	45
Financing Receivable, Allowance for Credit Losses, Write-downs	(2)	(2)
Provision for credit losses	0	6
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	30		30
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	10		12
Financing Receivable, Individually Evaluated for Impairment	222		230
Financing Receivable, Collectively Evaluated for Impairment	7,534		8,190
Financing Receivable, Gross	$ 7,756		$ 8,420

XML

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Loss Contingencies [Line Items]
Expire within one year	$ 3,699		$ 1,450
Expire after one year	1,426		1,392
Total	5,125		2,842
Unsettled consolidated obligation bonds
Loss Contingencies [Line Items]
Expire within one year	2,398		175
Expire after one year	0		0
Total	2,398		175
Member standby letters of credit
Loss Contingencies [Line Items]
Expire within one year	857		689
Expire after one year	757		725
Total	1,614		1,414
Housing authority standby bond purchase agreements
Loss Contingencies [Line Items]
Expire within one year	16		50
Expire after one year	350		382
Total	366		432
MPF Program mortgage purchase commitments
Loss Contingencies [Line Items]
Expire within one year	379		497
Expire after one year	0		0
Total	379		497
Repurchasable loans and indemnifications to Fannie Mae for MPF Xtra loans a
Loss Contingencies [Line Items]
Expire within one year	45	[1]	39	[1]
Expire after one year	0	[1]	0	[1]
Total	45	[1]	39	[1]
Advance commitments
Loss Contingencies [Line Items]
Expire within one year	4		0
Expire after one year	319		285
Total	$ 323		$ 285

[1] These contingent repurchase requests and indemnifications are classified in the expire within one year category since such repurchases and indemnifications are made upon request by Fannie Mae. However, these contingent repurchase requests and indemnifications do not have an expiration date, and accordingly, our repurchases and indemnifications to Fannie Mae may occur after one year from the reporting date.

XML

Investment Securities (Maturity Terms) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Schedule of Securities by Contractual Maturity [Line Items]
Available-For-Sale, Total Amortized Cost	$ 21,515
Available-For-Sale, Total Fair Value	23,004
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	8,397
Held-To-Maturity, Total Fair Value	9,309
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	87
Available-For-Sale, Due after One Year Through Five Years, Fair Value	92
Available-For-Sale, Due after Five Years Through Ten Years, Amortized Cost	99
Available-For-Sale, Due after Five Years Through Ten Years, Fair Value	107
Available-For-Sale, Due after Ten Years, Amortized Cost	462
Available-For-Sale, Due after Ten Years, Fair Value	507
Available-For-Sale, Total Amortized Cost	648
Available-For-Sale, Total Fair Value	706
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	62
Held-To-Maturity, Due in One Year or Less, Fair Value	63
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	52
Held-To-Maturity, Due after One Year Through Five Years, Fair Value	53
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	474
Held-To-Maturity, Due after Five Years Through Ten Years, Fair Value	504
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	1,175
Held-To-Maturity, Due after Ten Years, Fair Value	1,277
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	1,763
Held-To-Maturity, Total Fair Value	1,897
Asset-backed Securities [Member]
Schedule of Securities by Contractual Maturity [Line Items]
Available-For-Sale, Total Amortized Cost	20,867
Available-For-Sale, Total Fair Value	22,298
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	6,634
Held-To-Maturity, Total Fair Value	$ 7,412

XML

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

3 Months Ended

Mar. 31, 2013

Capital [Abstract]

Schedule of Minimum Capital Requirements [Table Text Block]

	March 31, 2013						December 31, 2012
	Requirement			Actual			Requirement			Actual
Risk-based capital	$	1,413		$	3,323		$	1,545		$	3,347
Total regulatory capital	$	2,597		$	3,323		$	2,783		$	3,347
Total regulatory capital ratio	4.00		%	5.12		%	4.00		%	4.81		%
Leverage capital	$	3,246		$	4,984		$	3,479		$	5,021
Leverage capital ratio	5.00		%	7.68		%	5.00		%	7.22		%

Total regulatory capital and leverage capital do not include accumulated other comprehensive income (loss). Under the FHFA regulation on capital classifications and critical capital levels for the FHLBs, we are adequately capitalized.

XML

Transactions with Members and Other FHLBs (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Assets - Advances	$ 14,403	$ 14,530
Liabilities - Deposits	819	816
Equity - Capital Stock	1,549	1,650
Related Party Members [Member]
Related Party Transaction [Line Items]
Assets - Advances	2,513	2,500
Liabilities - Deposits	117	106
Equity - Capital Stock	$ 226	$ 239

XML

Fair Value Accounting (Fair Value Measured on Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 42		$ 47
Level 3 Assets as a Percentage of Total Assets at Fair Value	0.40%		0.40%
Consolidated obligation discount notes	(75)		0
Consolidated Obligation Bond, Fair Value	(1,250)		(1,251)
Level 3 Liabilities as a Percentage of Total Liabilities at Fair Value	5.10%		5.80%
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
Derivative liabilities	0		0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,976		1,229
Available-for-sale securities	22,931		23,385
Advances	14,663		14,802
Derivative assets	1,061	[1]	1,160	[1]
Derivative liabilities	(2,567)		(2,778)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Available-for-sale securities	73		69
Advances	0		0
Derivative assets	27	[1]	32	[1]
Derivative liabilities	0		0
Netting Adjustments/Cash 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	(1,046)		(1,145)	[2]
Derivative liabilities	2,488		2,696	[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	1,976		1,229
Available-for-sale securities	22,931		23,385
Advances	9		9
Derivative assets	1,061	[3]	1,160	[1]
Total assets at fair value	25,977		25,783
Derivative liabilities	(2,567)	[3]	(2,778)	[1]
Total liabilities at fair value	3,892		4,029
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	73		69
Advances	0		0
Derivative assets	27	[3]	32	[3]
Total assets at fair value	100		101
Derivative liabilities	0		0
Total liabilities at fair value	76		82
Fair Value, Measurements, Recurring [Member] | Netting Adjustments/Cash Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]	0	[4]
Available-for-sale securities	0	[2]	0	[4]
Advances	0	[2]	0	[4]
Derivative assets	(1,046)	[2]	(1,145)	[4]
Total assets at fair value	(1,046)	[2]	(1,145)	[4]
Derivative liabilities	2,488	[2]	2,696	[4]
Total liabilities at fair value	(2,488)	[2]	(2,696)	[4]
Fair Value, Measurements, Recurring [Member] | Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,976		1,229
Available-for-sale securities	23,004		23,454
Advances	9		9
Derivative assets	42		47
Total assets at fair value	25,031		24,739
Derivative liabilities	(79)		(82)
Total liabilities at fair value	1,480		1,415
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		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	(36,244)		(34,241)
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	(76)	[5]	(82)	[5]
Consolidated Obligation Bonds [Member] | Netting Adjustments/Cash 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] | 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	(1,250)		(1,251)
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	(76)	[5]	(82)	[5]
Consolidated Obligation Bonds [Member] | Fair Value, Measurements, Recurring [Member] | Netting Adjustments/Cash Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Obligation Bond, Fair Value	0	[2]	0	[4]
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	(1,326)		(1,333)
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	1,868		1,106
Available-for-sale securities	706		754
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 Adjustments/Cash Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]	0	[4]
Available-for-sale securities	0	[2]	0	[4]
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	1,868		1,106
Available-for-sale securities	706		754
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	7,290		7,453
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 Adjustments/Cash Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	[2]	0	[4]
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	7,290		7,453
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	106		120
Available-for-sale securities	12,019		12,228
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 Adjustments/Cash Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]	0	[4]
Available-for-sale securities	0	[2]	0	[4]
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	106		120
Available-for-sale securities	12,019		12,228
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	2		3
Available-for-sale securities	2,916		2,950
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 Adjustments/Cash Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]	0	[4]
Available-for-sale securities	0	[2]	0	[4]
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	2		3
Available-for-sale securities	2,916		2,950
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	73		69
Private-label residential MBS [Member] | Fair Value, Measurements, Recurring [Member] | Netting Adjustments/Cash Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	[2]	0	[4]
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	73		69
Discount Notes [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] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	(24,292)		(31,262)
Discount Notes [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] | Netting Adjustments/Cash 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] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	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	(75)
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
Discount Notes [Member] | Fair Value, Measurements, Recurring [Member] | Netting Adjustments/Cash 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] | Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated obligation discount notes	$ (75)

[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] 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. See Note 9 - Derivatives and Hedging Activities for further details.

[5] 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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Allowance for Credit Losses (TDR) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]
Maximum period of monthly payment modification	36 months
Maximum monthly payment to housing expense ratio	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	$ 1
Conventional Mortgage Loan [Member]
Financing Receivable, Modifications [Line Items]
Conventional MPF Loans	33		17
Recorded investment in troubled debt restructurings on our conventional MPF Loans that occurred during the reporting periods	7	1
Conventional Mortgage Loan [Member] | Performing [Member]
Financing Receivable, Modifications [Line Items]
Conventional MPF Loans	16		14
Conventional Mortgage Loan [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Conventional MPF Loans	$ 17		$ 3

XML

Fair Value Accounting (Fair Value Option) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Fair Value, Option, Quantitative Disclosures [Roll Forward]
Net gain (loss) on instruments held at fair value	$ 1	$ 6
Advances [Member]
Fair Value, Option, Quantitative Disclosures [Roll Forward]
Balance beginning of period	9	9
New transactions elected for fair value option	0	0
Maturities and extinguishments	0	0
Net gain (loss) on instruments held at fair value	0	0
Change in accrued interest and other	0	0
Balance end of period	9	9
Consolidated Obligation Bonds [Member]
Fair Value, Option, Quantitative Disclosures [Roll Forward]
Balance beginning of period	(1,251)	(2,631)
New transactions elected for fair value option,	(250)	(2,325)
Maturities and extinguishments	250	1,820
Net gain (loss) on instruments held at fair value	1	4
Change in accrued interest and other	0	0
Balance end of period	(1,250)	(3,132)
Discount Notes [Member]
Fair Value, Option, Quantitative Disclosures [Roll Forward]
Balance beginning of period	0	(11,466)
New transactions elected for fair value option,	(75)	0
Maturities and extinguishments	0	2,200
Net gain (loss) on instruments held at fair value	0	2
Change in accrued interest and other	0	(4)
Balance end of period	$ (75)	$ (9,268)

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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	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Option, Quantitative Disclosures [Line Items]
Advances, Fair Value	$ 9	$ 9
Consolidated Obligation Bond, Fair Value	1,250	1,251
Consolidated obligation discount notes, Fair Value	75	0
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	1,250	1,250
Consolidated Obligation Bond, Fair Value	1,250	1,251
Fair value option adjustments	0	(1)
Discount Notes [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Consolidated Obligation, Unpaid Principal Balance, Liabilities	75	0
Consolidated obligation discount notes, Fair Value	75	0
Fair Value Over (Under) UPB, Discount Notes	$ 0	$ 0

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Accumulated Other Comprehensive Income (Loss) Amounts Reclassified in the Period (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification to net income	$ 1	[1]	$ 1	[1]
Reclassification of net realized (gains) losses to net income	(3)		(1)
Net Unrealized Investment Gain (Loss) [Member] | HTM Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification to net income	1	[1]
Net Unrealized on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification of net realized (gains) losses to net income	(3)
Post-Retirement Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	1
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Amounts Reclassified, Portion Attributable to Parent	(1)
Gain (Loss) on Derivatives [Member] | Net Unrealized on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification of net realized (gains) losses to net income	(1)
Interest Income [Member] | Net Unrealized on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification of net realized (gains) losses to net income	$ (2)

[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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Background and Basis of Presentation Subsequent Event (Tables)

3 Months Ended

Mar. 31, 2013

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Subsequent Events:

As previously disclosed in Note 12 - Assessments to the financial statements in our 2012 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 net of affordable housing assessments in the fourth quarter of 2011 related to our plan to fund affordable housing and economic development projects. This charge was recognized as “Non-interest expense - Other community investment” in our 2011 Statement of Income.

Subsequent to the filing of our 2011 Form 10-K, we developed the Community First ^b Fund, which is a framework for using these funds as part of a revolving loan fund, and submitted it to the FHFA for approval. In April of 2013, we received a letter from the FHFA approving the Community First Fund subject to certain supervisory conditions and further approval by our Board of Directors. In April of 2013, our Board of Directors approved the implementation of the Community First Fund, which resulted in the reversal of the $50 million charge into earnings in the second quarter of 2013. The $50 million reversal will be recognized through “Non-interest expense - Other community investment” in our second quarter 2013 Statement of Income. The reversal will not be included in our AHP assessment for 2013 since we added back the $50 million charge to income before assessments when we accrued our AHP assessment in 2011 - that is, we already have paid our AHP assessment attributable to the $50 million charge.

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Advances Advances by callable putable feature (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Advances by callable putable feature [Abstract]
Federal Home Loan Bank, Advances, Noncallable and Nonputtable	$ 11,369	$ 11,616
Federal Home Loan Bank, Advances, Callable	933	776
Federal Home Loan Bank, Advances, Puttable	1,935	1,948
Federal Home Loan Bank Advances At Par Value	14,237	14,340
Federal Home Loan Bank Advances, Valuation Adjustments For Hedging Activities	141	166
Federal Home Loan Bank, Advances, Other Adjustments	25	24
Advances by Federal Home Loan Bank	$ 14,403	$ 14,530

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Investment Securities (Available-for-sale Securities) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	$ 21,515	$ 21,886
Non-Credit OTTI Recognized in AOCI (Loss)	(2)	(8)
Gross Unrealized Gains in AOCI	1,551	1,644
Gross Unrealized Losses in AOCI	(60)	(68)
Available-for-sale	23,004	23,454
U.S. Government & Other Government Related [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	648	690
Non-Credit OTTI Recognized in AOCI (Loss)	0	0
Gross Unrealized Gains in AOCI	58	64
Gross Unrealized Losses in AOCI	0	0
Available-for-sale	706	754
FFELP ABS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	6,794	6,958
Non-Credit OTTI Recognized in AOCI (Loss)	0	0
Gross Unrealized Gains in AOCI	509	508
Gross Unrealized Losses in AOCI	(13)	(13)
Available-for-sale	7,290	7,453
GSE residential MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	11,265	11,402
Non-Credit OTTI Recognized in AOCI (Loss)	0	0
Gross Unrealized Gains in AOCI	800	880
Gross Unrealized Losses in AOCI	(46)	(54)
Available-for-sale	12,019	12,228
Government-guaranteed residential MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	2,732	2,758
Non-Credit OTTI Recognized in AOCI (Loss)	0	0
Gross Unrealized Gains in AOCI	184	192
Gross Unrealized Losses in AOCI	0	0
Available-for-sale	2,916	2,950
Private-label residential MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	76	78
Non-Credit OTTI Recognized in AOCI (Loss)	(2)	(8)
Gross Unrealized Gains in AOCI	0	0
Gross Unrealized Losses in AOCI	(1)	(1)
Available-for-sale	73	69
MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	14,073	14,238
Non-Credit OTTI Recognized in AOCI (Loss)	(2)	(8)
Gross Unrealized Gains in AOCI	984	1,072
Gross Unrealized Losses in AOCI	(47)	(55)
Available-for-sale	$ 15,008	$ 15,247

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Fair Value Accounting (Fair Value Measured on a Nonrecurring Basis) (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired MPF Loans	$ 0	$ 0
Real estate owned	0	0
Total nonrecurring assets	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired MPF Loans	0	0
Real estate owned	0	0
Total nonrecurring assets	0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired MPF Loans	205	212
Real estate owned	13	18
Total nonrecurring assets	$ 218	$ 230

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Transactions with Members and Other FHLBs (Tables)

3 Months Ended

Mar. 31, 2013

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.

	March 31, 2013		December 31, 2012
Assets - Advances	$	2,513	$	2,500
Liabilities - Deposits	117		106
Equity - Capital Stock	226		239

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Advances Advances by counterparty concentration (Details) (Advances [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
BMO Harris Bank N.A. [Member]
Federal Home Loan Bank, Advances, Borrowers Holding Ten Percent or More of Principal	$ 2,375
Concentration Risk, Percentage	17.00%
State Farm Bank, F.S.B [Member]
Federal Home Loan Bank, Advances, Borrowers Holding Ten Percent or More of Principal	$ 1,500
Concentration Risk, Percentage	11.00%

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Consolidated Obligations Consolidated obligation bonds by callable feature (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Unsecured Debt	$ 34,751	$ 32,569
Consolidated Obligation Bonds [Member]
Debt Instrument [Line Items]
Debt, Gross	34,919	32,659
Debt Instrument, Unamortized Discount (Premium), Net	14	13
Debt Valuation Adjustment for Hedging Activities	(182)	(104)
Fair Value, Option, Aggregate Differences, Consolidated Obligation Bonds	0	1
Unsecured Debt	34,751	32,569
Non Callable [Member] | Consolidated Obligation Bonds [Member]
Debt Instrument [Line Items]
Debt, Gross	18,669	19,179
Callable [Member] | Consolidated Obligation Bonds [Member]
Debt Instrument [Line Items]
Debt, Gross	$ 16,250	$ 13,480

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Derivatives and Hedging Activities Derivative instruments with legal right of offset (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Derivative instruments with legal right of offset [Abstract]
Derivative Asset, Fair Value, Gross Asset	$ 1,078	$ 1,177
Derivative Liability, Fair Value, Gross Liability	2,557	2,763
Derivative Asset, Net Amounts After Offsetting Adjustment, Fair Value	32	32
Derivative Liability, Net Amounts After Offsetting Adjustment, Fair Value	69	67
Derivative Asset, Not Subject to Master Netting Agreement	10	15
Derivative Laibility, Not Subject to Master Netting Agreement	10	15
Derivative assets	42	47
Derivative liabilities	79	82
Obligation to Return Securities Received as Collateral	30	30
Financial Instruments Owned and Pledged as Collateral, Amount Not Eligible to be Repledged by Counterparty	0	0
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(1,046)	(1,145)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	(2,488)	(2,696)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	12	17
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ 79	$ 82

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Investment Securities (Projected Home Price Recoveries) (Details)	Mar. 31, 2013
Minimum [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	(1.00%)
1 - 6 Months	0.00%
7-12 Month	1.00%
13 - 18 Months	2.00%
19-30 Months	2.00%
31-42 Months	2.00%
43-54 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	1.00%
1 - 6 Months	3.00%
7-12 Month	4.00%
13 - 18 Months	4.00%
19-30 Months	5.00%
31-42 Months	6.00%
43-54 Months	6.00%
Thereafter	5.60%

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Background and Basis of Presentation

3 Months Ended

Mar. 31, 2013

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.

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, 2012, included in our Annual Report on Form 10-K (2012 Form 10-K) filed with the SEC.

We do not consolidate any of our investments in variable interest entities. Our investments in variable interest entities include, but are not limited to, senior interests in private label mortgage backed securities (MBS), and Family Federal Education Loan Program (FFELP) asset backed securities (ABS). We have evaluated our investments in variable interest entities as of the periods presented to determine whether or not we are a primary beneficiary in any of them. The primary beneficiary is required to consolidate a variable interest entity. The primary beneficiary is the enterprise that has both of the following characteristics:

• The power to direct the activities of a variable interest entity that most significantly impact the entity's economic performance.

• The obligation to absorb losses of the entity that could potentially be significant to the variable interest entity or the right to receive benefits from the entity that could potentially be significant to the variable interest entity.

Based on these characteristics, we have determined that consolidation accounting is not required for our variable interest entities. Further, we have not provided financial or other support (explicitly or implicitly) during the periods presented in our financial statements to these variable interest entities that we were not previously contractually required to provide nor do we intend to provide such support in the future.

The carrying amounts and classification of the assets that relate to these variable interest entities are shown in investment securities in our statements of condition. We have no liabilities related to these variable interest entities. Our maximum loss exposure for our variable interest entities 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.

Subsequent Events:

As previously disclosed in Note 12 - Assessments to the financial statements in our 2012 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 net of affordable housing assessments in the fourth quarter of 2011 related to our plan to fund affordable housing and economic development projects. This charge was recognized as “Non-interest expense - Other community investment” in our 2011 Statement of Income.

Subsequent to the filing of our 2011 Form 10-K, we developed the Community First ^b Fund, which is a framework for using these funds as part of a revolving loan fund, and submitted it to the FHFA for approval. In April of 2013, we received a letter from the FHFA approving the Community First Fund subject to certain supervisory conditions and further approval by our Board of Directors. In April of 2013, our Board of Directors approved the implementation of the Community First Fund, which resulted in the reversal of the $50 million charge into earnings in the second quarter of 2013. The $50 million reversal will be recognized through “Non-interest expense - Other community investment” in our second quarter 2013 Statement of Income. The reversal will not be included in our AHP assessment for 2013 since we added back the $50 million charge to income before assessments when we accrued our AHP assessment in 2011 - that is, we already have paid our AHP assessment attributable to the $50 million charge.

^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. “Community First” is a trademark of the Federal Home Loan Bank of Chicago.

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Derivatives and Hedging Activities (Derivatives in Statement of Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedges - ineffectiveness net gain (loss)	$ 2	$ 5
Cash flow hedges - ineffectiveness net gain (loss)	1	2
Economic hedges - net gain (loss)	(1)	4
Net gains (losses) on derivatives and hedging activities	2	11
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedges - ineffectiveness net gain (loss)	2	4
Economic hedges - net gain (loss)	11	(2)
Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedges - ineffectiveness net gain (loss)	0	1
Interest Rate Swaption [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Economic hedges - net gain (loss)	(6)	0
Interest Rate Caps or Floors [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Economic hedges - net gain (loss)	(19)	(13)
Net Interest Settlements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Economic hedges - net gain (loss)	$ 13	$ 19

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Investment Securities (Held-to-Maturities Securities) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	$ 8,763	$ 9,948
OTTI Recognized in AOCI (Loss)	(366)	(381)
Carrying Vallue	8,397	9,567
Gross Unrecognized Holding Gains	914	921
Gross Unrecognized Holding Losses	(2)	(6)
Fair Value	9,309	10,482
U.S. Government & Other Government Related [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	1,739	2,487
OTTI Recognized in AOCI (Loss)	0	0
Carrying Vallue	1,739	2,487
Gross Unrecognized Holding Gains	134	139
Gross Unrecognized Holding Losses	0	0
Fair Value	1,873	2,626
States and Local Housing Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	24	24
OTTI Recognized in AOCI (Loss)	0	0
Carrying Vallue	24	24
Gross Unrecognized Holding Gains	0	0
Gross Unrecognized Holding Losses	0	0
Fair Value	24	24
GSE residential MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	3,936	4,282
OTTI Recognized in AOCI (Loss)	0	0
Carrying Vallue	3,936	4,282
Gross Unrecognized Holding Gains	330	377
Gross Unrecognized Holding Losses	0	0
Fair Value	4,266	4,659
Government-guaranteed residential MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	1,321	1,340
OTTI Recognized in AOCI (Loss)	0	0
Carrying Vallue	1,321	1,340
Gross Unrecognized Holding Gains	56	57
Gross Unrecognized Holding Losses	0	0
Fair Value	1,377	1,397
Private-label residential MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	1,743	1,815
OTTI Recognized in AOCI (Loss)	(366)	(381)
Carrying Vallue	1,377	1,434
Gross Unrecognized Holding Gains	394	348
Gross Unrecognized Holding Losses	(2)	(6)
Fair Value	1,769	1,776
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost Basis	7,000	7,437
OTTI Recognized in AOCI (Loss)	(366)	(381)
Carrying Vallue	6,634	7,056
Gross Unrecognized Holding Gains	780	782
Gross Unrecognized Holding Losses	(2)	(6)
Fair Value	$ 7,412	$ 7,832

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MPF Loans (Tables)

3 Months Ended

Mar. 31, 2013

Mortgage Loans on Real Estate [Abstract]

Mortgage Loans Held for Portfolio [Table 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	March 31, 2013			December 31, 2012
Medium term (15 years or less)	$	2,301		$	2,557
Long term (greater than 15 years)	7,271			7,783
Total unpaid principal balance	9,572			10,340
Net premiums, credit enhancement and deferred loan fees	33			37
Hedging adjustments	88			97
Total before allowance for credit losses	9,693			10,474
Allowance for credit losses	(40		)	(42		)
Total MPF Loans held in portfolio, net	$	9,653		$	10,432
Conventional mortgage loans	$	7,612		$	8,260
Government insured mortgage loans	1,960			2,080
Total unpaid principal balance	$	9,572		$	10,340

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)

3 Months Ended

Mar. 31, 2013

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	March 31, 2013		December 31, 2012
Noncallable/nonputable	$	11,369	$	11,616
Callable	933		776
Putable	1,935		1,948
Total par value	14,237		14,340
Hedging adjustments	141		166
Other adjustments	25		24
Total advances	$	14,403	$	14,530

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 March 31, 2013	Amount		Weighted Average Interest Rate		Next Maturity or Call Date		Next Maturity or Put Date
Due in one year or less	$	5,177	0.55	%	$	6,104	$	7,100
One to two years	1,165		2.06	%	1,070		1,163
Two to three years	1,167		2.50	%	967		727
Three to four years	1,579		3.41	%	1,379		1,058
Four to five years	4,132		1.19	%	3,755		3,362
More than five years	1,017		2.94	%	962		827
Total par value	$	14,237	1.51	%	$	14,237	$	14,237

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

Credit Risk Concentration and Collateral Pledged

The following advance borrowers exceeded 10% of our total advances outstanding:

As of March 31, 2013	Par Value Outstanding		% of Total
BMO Harris Bank N.A.	$	2,375	17	%
State Farm Bank, F.S.B	1,500		11	%

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Allowance for Credit Losses (Credit Quality Indicators - MPF Loans) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Recorded Investment, Past Due [Line Items]
Past due 30-59 days	$ 305		$ 296
Past due 60-89 days	87		101
Past due 90 days or more	445		462
Total past due	837		859
Total current	8,905		9,668
Financing Receivable, Gross	9,742		10,527
In process of foreclosure	215		225
Serious delinquency rate	4.58%	[1]	4.40%	[1]
Past due 90 days or more still accruing interest	267	[2]	275	[2]
On nonaccrual status	226		234
Conventional Mortgage Loan [Member]
Recorded Investment, Past Due [Line Items]
Past due 30-59 days	191		180
Past due 60-89 days	56		59
Past due 90 days or more	248		254
Total past due	495		493
Total current	7,261		7,927
Financing Receivable, Gross	7,756		8,420
In process of foreclosure	141		149
Serious delinquency rate	3.21%	[1]	3.03%	[1]
Past due 90 days or more still accruing interest	69	[2]	67	[2]
On nonaccrual status	226		234
Government [Member]
Recorded Investment, Past Due [Line Items]
Past due 30-59 days	114		116
Past due 60-89 days	31		42
Past due 90 days or more	197		208
Total past due	342		366
Total current	1,644		1,741
Financing Receivable, Gross	1,986		2,107
In process of foreclosure	74		76
Serious delinquency rate	9.95%	[1]	9.86%	[1]
Past due 90 days or more still accruing interest	198	[2]	208	[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 AFS) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 0		$ 40
Less than 12 Months, Gross Unrealized Losses	0		0
12 Months or More, Fair Value	4,627		4,688
12 Months or More, Gross Unrealized Losses	(62)		(76)
Total Fair Value	4,627		4,728
Total Gross Unrealized Losses	(62)		(76)
Gross unrealized unrecognized recoveries in fair value	52		45
FFELP ABS [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	1,055		1,079
12 Months or More, Gross Unrealized Losses	(13)		(13)
Total Fair Value	1,055		1,079
Total Gross Unrealized Losses	(13)		(13)
GSE residential MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0		40
Less than 12 Months, Gross Unrealized Losses	0		0
12 Months or More, Fair Value	3,504		3,540
12 Months or More, Gross Unrealized Losses	(46)		(54)
Total Fair Value	3,504		3,580
Total Gross Unrealized Losses	(46)		(54)
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	68		69
12 Months or More, Gross Unrealized Losses	(3)	[1]	(9)	[1]
Total Fair Value	68		69
Total Gross Unrealized Losses	(3)	[1]	(9)	[1]
MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0		40
Less than 12 Months, Gross Unrealized Losses	0		0
12 Months or More, Fair Value	3,572		3,609
12 Months or More, Gross Unrealized Losses	(49)		(63)
Total Fair Value	3,572		3,649
Total Gross Unrealized Losses	$ (49)		$ (63)

[1] Includes $52 million and $45 million of gross unrealized/unrecognized recoveries in fair value at March 31, 2013, and at December 31, 2012.

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Allowance for Credit Losses (Tables)

3 Months Ended

Mar. 31, 2013

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. For detailed definitions of how Total Severity Rate and Credit Loss Severity Rate are calculated, see Loss Severity on page F-38 in our 2012 Form 10-K.

As of	March 31, 2013			December 31, 2012
Total Severity Rate	37.0		%	38.0		%
Credit Loss Severity Rate	21.0		%	22.0		%
Total estimated losses outstanding	$	83		$	88
Less: losses expected to be absorbed by MPF Risk Sharing Structure a	(21		)	(23		)
Our share of total losses	62			65
Less: non-credit losses	(27		)	(27		)
Credit losses	35			38
Plus: other estimated credit losses in the remaining portfolio	5			4
Allowance for credit losses on conventional MPF Loans	$	40		$	42

^a 

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.

	March 31, 2013			March 31, 2012
For the three months ended
Allowance for credit losses on conventional MPF Loans-
Balance, beginning of period	$	42		$	45
Losses charged to the allowance	(2		)	(2		)
Provision for credit losses	—			6
Balance, end of period	$	40		$	49
As of	March 31, 2013			December 31, 2012
Specifically identified and individually evaluated for impairment	$	30		$	30
Homogeneous pools of loans and collectively evaluated for impairment	10			12
Allowance assigned to conventional MPF Loan	$	40		$	42
Individually evaluated for impairment - with an allowance	$	222		$	230
Collectively evaluated for impairment	7,534			8,190
Recorded Investment in Conventional MPF Loans	$	7,756		$	8,420

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.

	March 31, 2013									December 31, 2012
As of	Conventional			Government			Total			Conventional			Government			Total
Past due 30-59 days	$	191		$	114		$	305		$	180		$	116		$	296
Past due 60-89 days	56			31			87			59			42			101
Past due 90 days or more	248			197			445			254			208			462
Total past due	495			342			837			493			366			859
Total current	7,261			1,644			8,905			7,927			1,741			9,668
Total recorded investment	$	7,756		$	1,986		$	9,742		$	8,420		$	2,107		$	10,527
In process of foreclosure	$	141		$	74		$	215		$	149		$	76		$	225
Serious delinquency rate a	3.21		%	9.95		%	4.58		%	3.03		%	9.86		%	4.40		%
Past due 90 days or more still accruing interest b	$	69		$	198		$	267		$	67		$	208		$	275
On nonaccrual status	$	226		$	—		$	226		$	234		$	—		$	234

^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 on Financing Receivables [Table Text Block]

The table below presents our recorded investment balance in troubled debt restructured loans as of the dates presented. The recorded investment balances for modified loans still in their trial period were immaterial. Performing includes modified loans that are accruing interest. Nonperforming includes modified loans that are on nonaccrual status.

	March 31, 2013						December 31, 2012
As of	Performing		Nonperforming		Total		Performing		Nonperforming		Total
Recorded investment in conventional MPF Loan TDRs	$	16	$	17	$	33	$	14	$	3	$	17

Our pre- and post-modification recorded investment in troubled debt restructurings during the quarter ended March 31, 2013, was $7 million and during the quarter ended March 31, 2012, was $1 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. Specifically, the modified terms do not fully take effect until after a three month trial period in which the borrower demonstrates an ability to pay under the modified terms during the trial period; however, we consider the conventional MPF Loan a troubled debt restructuring at the inception of the trial period. If the borrower fails to pay during the trial period, the payment terms revert back to the original agreement with the borrower. 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 from the previous 12 months that subsequently defaulted during the three months ending March 31, 2013, and 2012 were $8 million and $1 million. A borrower is considered to have defaulted on a troubled debt restructuring if contractually due principal or interest payment is sixty days past due at any time during the past 12 months. The amount of nonperforming troubled debt restructurings are less than the amount that have subsequently defaulted either because a defaulted troubled debt restructuring subsequently became current or was transferred to REO.

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.

	March 31, 2013						December 31, 2012
As of	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
Impaired conventional MPF Loans with an allowance	$	222	$	217	$	30	$	230	$	224	$	30

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.

	March 31, 2013				March 31, 2012
For the periods ended	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Three months	$	224	$	—	$	202	$	2

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Derivatives and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2013

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. As of March 31, 2013, we delivered $1 million excess collateral on derivative liabilities. Netting adjustments represent the effect of legally enforceable master netting agreements that allow us to settle positive and negative positions.

	March 31, 2013									December 31, 2012
As of	Notional Amount		Derivative Assets				Derivative Liabilities			Notional Amount		Derivative Assets				Derivative Liabilities
Derivatives in hedge accounting relationships-
Interest rate swaps	$	27,746	$	86			$	1,985		$	24,678	$	103			$	2,107
Total	27,746		86				1,985			24,678		103				2,107
Derivatives not in hedge accounting relationships-
Interest rate swaps	15,004		650				572			13,352		691				656
Interest rate swaptions	5,510		139				—			8,690		160				—
Interest rate caps or floors	1,913		203				—			1,913		223				—
Mortgage delivery commitments	757		10				10			992		15				15
Total	23,184		1,002				582			24,947		1,089				671
Total before adjustments	$	50,930	1,088				2,567			$	49,625	1,192				2,778
Netting adjustments			(1,030		)		(1,030		)			(1,120		)		(1,120		)
Exposure at fair value			58			a	1,537					72			a	1,658
Cash collateral and related accrued interest			(16		)		(1,458		)			(25		)		(1,576		)
Derivative assets and liabilities			$	42			$	79				$	47			$	82

^a  Includes net accrued interest receivable of $8 million as of March 31, 2013, and $1 million as of December 31, 2012.

Balance Sheet Offsetting [Table Text Block]

The following table shows the offsetting of derivative assets and liabilities for derivative instruments with legal right of offset as well as derivative instruments without the legal right of offset (i.e., mortgage delivery commitments):

	March 31, 2013						December 31, 2012
As of	Derivative Assets			Derivative Liabilities			Derivative Assets			Derivative Liabilities
Gross recognized amount	$	1,078		$	2,557		$	1,177		$	2,763
Gross amounts of netting adjustments and cash collateral	(1,046		)	(2,488		)	(1,145		)	(2,696		)
Net amounts after offsetting adjustments	32			69			32			67
Derivatives without legal right of offset	10			10			15			15
Total derivatives recorded in Statements of Condition	42			79			47			82
Noncash collateral received or pledged and not offset-
Cannot be sold or repledged	30			—			30			—
Net unsecured amount	$	12		$	79		$	17		$	82

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 March 31,
For the periods ending	2013			2012
Fair value hedges -
Interest rate swaps	$	2		$	4
Other	—			1
Fair value hedges - ineffectiveness net gain (loss)	2			5
Cash flow hedges - ineffectiveness net gain (loss)	1			2
Economic hedges -
Interest rate swaps	11			(2		)
Interest rate swaptions	(6		)	—
Interest rate caps/floors	(19		)	(13		)
Net interest settlements	13			19
Economic hedges - net gain (loss)	(1		)	4
Net gains (losses) on derivatives and hedging activities	$	2		$	11

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 Ineffectiveness Gain (Loss) Recognized in Derivatives and Hedging Activities			Net Interest Settlements Effect on Net Interest Income a			Hedge Adjustments Amortized into Net Interest Income b
Three months ended March 31, 2013
Hedged item type -
Available-for-sale securities	$	56		$	(55	)	$	1		$	(34	)	$	—
Advances	26			(23		)	3			(17		)	(1		)
MPF Loans held for portfolio	—			—			—			—			(10		)
Consolidated obligation bonds	(87		)	85			(2		)	47			(7		)
Total	$	(5	)	$	7		$	2		$	(4	)	$	(18	)
Three months ended March 31, 2012
Hedged item type -
Available-for-sale securities	$	36		$	(34	)	$	2		$	(32	)	$	—
Advances	8			(5		)	3			(24		)	(23		)
MPF Loans held for portfolio	(1		)	2			1			(1		)	(14		)
Consolidated obligation bonds	(24		)	23			(1		)	38			(9		)
Total	$	19		$	(14	)	$	5		$	(19	)	$	(46	)

^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.

	Amortization of 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		Change in OCI			Net Interest Settlements Effect on Net Interest Income a
Three months ended March 31, 2013
Advances - interest rate floors	$	3		$	—	$	3		$	—	$	(3	)	$	—
Discount notes - interest rate swaps	(1		)	1		—			88		88			(67		)
Total	$	2		$	1	$	3		$	88	$	85		$	(67	)
Three months ended March 31, 2012
Advances - interest rate floors	$	4		$	—	$	4		$	—	$	(4	)	$	—
Discount notes - interest rate caps	(2		)	—		(2		)	—		2			—
Discount notes - interest rate swaps	(1		)	2		1			52		51			(67		)
Bonds - interest rate swaps	(2		)	—		(2		)	—		2			—
Total	$	(1	)	$	2	$	1		$	52	$	51		$	(67	)

^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.

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Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Operating
Net cash provided by (used in) operating activities	$ 311		$ 339
Investing
Net change Federal Funds sold	(926)		(520)
Net change securities purchased under agreements to resell	665		(425)
Advances -
Principal collected	62,471		31,206
Issued	(62,368)		(30,668)
MPF Loans held in portfolio -
Principal collected	786		975
Purchases	(13)		(13)
Trading securities -
Proceeds from maturities, sales, and paydowns	244		134
Purchases	(1,000)		0
Held-to-maturity securities -
Short-term held-to-maturity securities, net	705	[1]	278	[1]
Proceeds from maturities	494	[1]	496	[1]
Purchases	(3)	[1]	(11)	[1]
Available-for-sale securities -
Proceeds from maturities and sales	314		344
Proceeds from sale of foreclosed assets	25		14
Capital expenditures for software and equipment	(1)		(2)
Net cash provided by (used in) investing activities	1,393		1,808
Financing
Net change deposits	3		83
Maturities of securities sold under agreements to repurchase	0		(400)
Net proceeds from issuance of consolidated obligations -
Discount notes	199,066		102,532
Bonds	4,453		10,961
Payments for maturing and retiring consolidated obligations -
Discount notes	(206,037)		(105,514)
Bonds	(2,189)		(9,779)
Net proceeds (payments) on derivative contracts with financing element	(18)		(20)
Proceeds from issuance of capital stock	38		17
Repurchase or redemption of capital stock	(96)		(499)
Redemptions of mandatory redeemable capital stock	(45)		(2)
Cash dividends paid	(1)		(1)
Net cash provided by (used in) financing activities	(4,826)		(2,622)
Net increase (decrease) in cash and due from banks	(3,122)		(475)
Cash and due from banks at beginning of year	3,564		1,002
Cash and due from banks at end of period	442		527
Supplemental
Capital stock reclassified to mandatorily redeemable capital stock	43		12
Transfer of MPF Loans to real estate owned	$ 23		$ 22

[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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Consolidated Obligations (Tables)

3 Months Ended

Mar. 31, 2013

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 March 31, 2013	Contractual Maturity		Weighted Average Interest Rate		Next Maturity or Call Date
Due in one year or less	$	7,096	2.83	%	$	22,306
One to two years	4,491		4.24	%	4,941
Two to three years	2,621		2.72	%	1,896
Three to four years	2,663		4.16	%	2,143
Four to five years	4,706		2.56	%	2,276
Thereafter	13,342		2.19	%	1,357
Total par value	$	34,919	2.82	%	$	34,919

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 March 31, 2013	$	24,292	$	24,298	0.13	%
As of December 31, 2012	31,260		31,269		0.13	%

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

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

As of	March 31, 2013			December 31, 2012
Noncallable	$	18,669		$	19,179
Callable	16,250			13,480
Total par value	34,919			32,659
Bond premiums (discounts), net	14			13
Hedging adjustments	(182		)	(104		)
Fair value option adjustments	—			1
Total consolidated obligation bonds	$	34,751		$	32,569

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Interest Income and Interest Expense Parenthetical (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Prepayment Fees, Fair Value Hedge Adjustments Amortized Into Net Interest Income	$ 0	$ (22)

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MPF Loans (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Mortgage Loans on Real Estate [Line Items]
Total unpaid principal balance	$ 9,572	$ 10,340
Net premiums, credit enhancement and deferred loan fees	33	37
MPF hedging adjustments	88	97
Total before allowance for credit losses	9,693	10,474
Allowance for credit losses	(40)	(42)
Total MPF Loans held in portfolio, net	9,653	10,432
Medium term (15 years or less) [Member]
Mortgage Loans on Real Estate [Line Items]
Total unpaid principal balance	2,301	2,557
Long term (greater than 15 years) [Member]
Mortgage Loans on Real Estate [Line Items]
Total unpaid principal balance	7,271	7,783
Conventional Mortgage Loan [Member]
Mortgage Loans on Real Estate [Line Items]
Total unpaid principal balance	7,612	8,260
Allowance for credit losses	(40)	(42)	(49)	(45)
Government [Member]
Mortgage Loans on Real Estate [Line Items]
Total unpaid principal balance	$ 1,960	$ 2,080

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Fair Value Accounting (Carrying Value and Fair Value of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	$ 42		$ 47
Discount notes	75		0
Bonds	1,250		1,251
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	442		3,564
Federal Funds Sold	0
Securities purchased under agreements to resell	0		0
Trading securities	0		0
Available-for-sale securities	0		0
Held-to-maturity securities	0		0
Advances	0		0
MPF loans held in portofolio, net	0		0
Accrued interest receivable	0		0
Derivative assets	0		0
Deposits	0		0
Accured interest payable	0		0
Mandatorily redeemable capital stock	4		6
Derivative liabilities	0		0
Subordinated notes	0		0
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0		0
Federal Funds Sold	926
Securities purchased under agreements to resell	5,835		6,500
Trading securities	1,976		1,229
Available-for-sale securities	22,931		23,385
Held-to-maturity securities	7,540		8,706
Advances	14,663		14,802
MPF loans held in portofolio, net	10,190		11,015
Accrued interest receivable	106		116
Derivative assets	1,061	[1]	1,160	[1]
Deposits	819		816
Accured interest payable	287		156
Mandatorily redeemable capital stock	0		0
Derivative liabilities	2,567		2,778
Subordinated notes	1,155		1,162
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0		0
Federal Funds Sold	0
Securities purchased under agreements to resell	0		0
Trading securities	0		0
Available-for-sale securities	73		69
Held-to-maturity securities	1,769		1,776
Advances	0		0
MPF loans held in portofolio, net	205		212
Accrued interest receivable	0		0
Derivative assets	27	[1]	32	[1]
Deposits	0		0
Accured interest payable	0		0
Mandatorily redeemable capital stock	0		0
Derivative liabilities	0		0
Subordinated notes	0		0
Netting Adjustments/Cash Collateral [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0	[2]	0	[2]
Federal Funds Sold	0	[2]
Securities purchased under agreements to resell	0	[2]	0	[2]
Trading securities	0	[2]	0	[2]
Available-for-sale securities	0	[2]	0	[2]
Held-to-maturity securities	0	[2]	0	[2]
Advances	0	[2]	0	[2]
MPF loans held in portofolio, net	0	[2]	0	[2]
Accrued interest receivable	0	[2]	0	[2]
Derivative assets	(1,046)		(1,145)	[2]
Deposits	0	[2]	0	[2]
Accured interest payable	0	[2]	0	[2]
Mandatorily redeemable capital stock	0	[2]	0	[2]
Derivative liabilities	(2,488)		(2,696)	[2]
Subordinated notes	0	[2]	0	[2]
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	442		3,564
Federal Funds Sold	926
Securities purchased under agreements to resell	5,835		6,500
Trading securities	1,976		1,229
Available-for-sale securities	23,004		23,454
Held-to-maturity securities	8,397		9,567
Advances	14,403		14,530
MPF loans held in portofolio, net	9,653		10,432
Accrued interest receivable	106		116
Derivative assets	42		47
Deposits	819		816
Accured interest payable	287		156
Mandatorily redeemable capital stock	4		6
Derivative liabilities	79		82
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	442		3,564
Federal Funds Sold	926
Securities purchased under agreements to resell	5,835		6,500
Trading securities	1,976		1,229
Available-for-sale securities	23,004		23,454
Held-to-maturity securities	9,309		10,482
Advances	14,663		14,802
MPF loans held in portofolio, net	10,395		11,227
Accrued interest receivable	106		116
Derivative assets	42		47
Deposits	819		816
Accured interest payable	287		156
Mandatorily redeemable capital stock	4		6
Derivative liabilities	79		82
Subordinated notes	1,155		1,162
Discount Notes [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	0		0
Discount Notes [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	24,292		31,262
Discount Notes [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	0		0
Discount Notes [Member] | Netting Adjustments/Cash Collateral [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	0	[2]	0	[2]
Discount Notes [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	24,292		31,260
Discount Notes [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes	24,292		31,262
Consolidated Obligation Bonds [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	0		0
Consolidated Obligation Bonds [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	36,244		34,241
Consolidated Obligation Bonds [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	76	[3]	82	[3]
Consolidated Obligation Bonds [Member] | Netting Adjustments/Cash Collateral [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	0	[2]	0	[2]
Consolidated Obligation Bonds [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	34,751		32,569
Consolidated Obligation Bonds [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds	$ 36,320		$ 34,323

[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.

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Statements of Condition (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets
Cash and due from banks	$ 442	$ 3,564
Federal Funds sold	926	0
Securities purchased under agreements to resell	5,835	6,500
Investment securities -
Trading securities	1,976	1,229
Available-for-sale	23,004	23,454
Held-to-maturity, $9,309 and $10,482 fair value	8,397	9,567
Total investment securities	33,377	34,250
Advances, $9 and $9 carried at fair value	14,403	14,530
MPF Loans held in portfolio, net of allowance for credit losses of $(40) and $(42)	9,653	10,432
Interest Receivable	106	116
Derivative assets	42	47
Software and equipment, net of accumulated amortization/depreciation of $(157) and $(157)	31	32
Other assets	107	113
Total assets	64,922	69,584
Deposits -
Interest bearing	741	728
Non-interest bearing	78	88
Total deposits	819	816
Consolidated obligations, net
Discount Notes, $75 and $0 carried at fair value	24,292	31,260
Bonds, $1,250 and $1,251 carried at fair value	34,751	32,569
Total consolidated obligations, net	59,043	63,829
Accrued interest payable	287	156
Mandatorily redeemable capital stock	4	6
Derivative liabilities	79	82
Affordable Housing Program assessment payable	83	78
Other liabilities	158	169
Subordinated notes	1,000	1,000
Total liabilities	61,473	66,136
Commitments and Contingencies
Capital
Class B-1 Capital stock - putable $100 par value - 1 million and 1 million shares issued and outstanding at March 31, 2013 and December 31, 2012	116	122
Class B-2 Capital stock, - putable $100 par value - 14 million and 15 million shares issued and outstanding at March 31, 2013 and December 31, 2012	1,433	1,528
Total Capital stock	1,549	1,650
Retained Earnings, unrestricted	1,647	1,584
Retained Earnings, restricted	123	107
Total retained earnings	1,770	1,691
Accumulated other comprehensive income (loss)	130	107
Total capital	3,449	3,448
Total liabilities and capital	$ 64,922	$ 69,584

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Investment Securities (Unrealized Temporary Losses on HTM) (Details) (Private-label residential MBS [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
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	1,626	1,640
12 Months or More, Gross Unrealized Losses	(368)	(387)
Total Fair Value	1,626	1,640
Total Gross Unrealized Losses	$ (368)	$ (387)

XML

Statements of Stockholders' Equity (USD $) In Millions, unless otherwise specified		Total	Common Stock Putable [Member]		Retained Earnings, Unrestricted [Member]	Retained Earnings, Restricted [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance, beginning at Dec. 31, 2011		$ 3,292	$ 2,402		$ 1,289	$ 32	$ 1,321	$ (431)
Shares, beginning at Dec. 31, 2011	[1]		24
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income		160			93	23	116	44
Proceeds from issuance of capital stock, shares	[1]		0
Proceeds from issuance of capital stock, par value		17	17
Repurchases of capital stock, shares	[1]		(5)
Repurchases of capital stock, par value		(499)	(499)
Capital stock reclassified to mandatorily redeemable capital stock, shares	[1]		0
Capital stock reclassified to mandatorily redeemable capital stock		(12)	(12)
Cash dividends on capital stock		(1)			(1)	0	(1)
Balance, ending at Mar. 31, 2012		2,957	1,908		1,381	55	1,436	(387)
Shares, ending at Mar. 31, 2012	[1]		19
Balance, beginning at Dec. 31, 2012		3,448	1,650	[2]	1,584	107	1,691	107
Shares, beginning at Dec. 31, 2012	[1],[2]		16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income		103			64	16	80	23
Proceeds from issuance of capital stock, shares	[1]		0
Proceeds from issuance of capital stock, par value		38	38
Repurchases of capital stock, shares	[1]		(1)
Repurchases of capital stock, par value		(96)	(96)
Capital stock reclassified to mandatorily redeemable capital stock, shares	[1]		0
Capital stock reclassified to mandatorily redeemable capital stock		(43)	(43)
Cash dividends on capital stock		(1)			(1)	0	(1)
Balance, ending at Mar. 31, 2013		$ 3,449	$ 1,549		$ 1,647	$ 123	$ 1,770	$ 130
Shares, ending at Mar. 31, 2013	[1]		15

[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.

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Derivatives and Hedging Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Derivative [Line Items]
Derivative, Collateral, Right to Reclaim Cash	$ 1
Maximum amount of additional collateral at fair value to our derivatives counterparties if our credit rating had been lowered to the next lower rating	69
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	7 years

XML

Fair Value Accounting (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

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. 

	March 31, 2013
			Fair Value
	Carrying  Value		Total		Level 1		Level 2			Level 3			Netting Adjustment/ Cash Collateral a
Financial Assets
Cash and due from banks	$	442	$	442	$	442	$	—		$	—		$	—
Federal Funds sold	926		926		—		926			—			—
Securities purchased under agreements to resell	5,835		5,835		—		5,835			—			—
Trading securities	1,976		1,976		—		1,976			—			—
Available-for-sale securities	23,004		23,004		—		22,931			73			—
Held-to-maturity securities	8,397		9,309		—		7,540			1,769			—
Advances	14,403		14,663		—		14,663			—			—
MPF Loans held in portfolio, net	9,653		10,395		—		10,190			205			—
Accrued interest receivable	106		106		—		106			—			—
Derivative assets	42		42		—		1,061		b	27		b	(1,046		)
Financial Liabilities
Deposits	$	819	$	819	$	—	$	819		$	—		$	—
Consolidated obligations -
Discount notes	24,292		24,292		—		24,292			—			—
Bonds	34,751		36,320		—		36,244			76		c	—
Accrued interest payable	287		287		—		287			—			—
Mandatorily redeemable capital stock	4		4		4		—			—			—
Derivative liabilities	79		79		—		2,567			—			(2,488		)
Subordinated notes	1,000		1,155		—		1,155			—			—

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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, 2012
			Fair Value
	Carrying  Value		Total		Level 1		Level 2			Level 3			Netting Adjustment/ Cash Collateral a
Financial Assets
Cash and due from banks	$	3,564	$	3,564	$	3,564	$	—		$	—		$	—
Securities purchased under agreements to resell	6,500		6,500		—		6,500			—			—
Trading securities	1,229		1,229		—		1,229			—			—
Available-for-sale securities	23,454		23,454		—		23,385			69			—
Held-to-maturity securities	9,567		10,482		—		8,706			1,776			—
Advances	14,530		14,802		—		14,802			—			—
MPF Loans held in portfolio, net	10,432		11,227		—		11,015			212			—
Accrued interest receivable	116		116		—		116			—			—
Derivative assets	47		47		—		1,160		b	32		b	(1,145		)
Financial Liabilities
Deposits	$	816	$	816	$	—	$	816		$	—		$	—
Consolidated obligations -
Discount notes	31,260		31,262		—		31,262			—			—
Bonds	32,569		34,323		—		34,241			82		c	—
Accrued interest payable	156		156		—		156			—			—
Mandatorily redeemable capital stock	6		6		6		—			—			—
Derivative liabilities	82		82		—		2,778			—			(2,696		)
Subordinated notes	1,000		1,162		—		1,162			—			—

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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.

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 March 31, 2013	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	1,868			$	—			$	—		$	1,868
GSE residential MBS	—		106				—				—			106
Governmental-guaranteed residential MBS	—		2				—				—			2
Total Trading Securities	—		1,976				—				—			1,976
AFS securities:
U.S. Government & other government related	—		706				—				—			706
FFELP ABS	—		7,290				—				—			7,290
GSE residential MBS	—		12,019				—				—			12,019
Government-guaranteed residential MBS	—		2,916				—				—			2,916
Private-label residential MBS	—		—				73				—			73
Total AFS Securities	—		22,931				73				—			23,004
Advances	—		9				—				—			9
Derivative assets	—		1,061			b	27			b	(1,046		)	42
Total assets at fair value	$	—	$	25,977			$	100			$	(1,046	)	$	25,031
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation discount notes	$	—	$	(75	)		$	—			$	—		$	(75	)
Consolidated obligation bonds	—		(1,250		)		(76		)	c	—			(1,326		)
Derivative liabilities	—		(2,567		)	b	—				2,488			(79		)
Total liabilities at fair value	$	—	$	(3,892	)		$	(76	)		$	2,488		$	(1,480	)
Level 3 as a percent of total liabilities at fair value							5.1		%

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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, 2012	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	1,106			$	—			$	—		$	1,106
GSE residential MBS	—		120				—				—			120
Governmental-guaranteed residential MBS	—		3				—				—			3
Total Trading Securities	—		1,229				—				—			1,229
AFS securities:
U.S. Government & other government related	—		754				—				—			754
FFELP ABS	—		7,453				—				—			7,453
GSE residential MBS	—		12,228				—				—			12,228
Government-guaranteed residential MBS	—		2,950				—				—			2,950
Private-label residential MBS	—		—				69				—			69
Total AFS Securities	—		23,385				69				—			23,454
Advances	—		9				—				—			9
Derivative assets	—		1,160			b	32			b	(1,145		)	47
Total assets at fair value	$	—	$	25,783			$	101			$	(1,145	)	$	24,739
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation bonds	—		(1,251		)		(82		)	c	—			(1,333		)
Derivative liabilities	—		(2,778		)	b	—				2,696			(82		)
Total liabilities at fair value	$	—	$	(4,029	)		$	(82	)		$	2,696		$	(1,415	)
Level 3 as a percent of total liabilities at fair value							5.8		%

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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
For the three months ended March 31, 2013
Balance at beginning of period	$	69		$	32		$	(82	)
Gains (losses) realized and unrealized:
Change in fair value recorded in earnings - Instruments held under fair value option	—			—			6
Recorded in earnings in interest income	1			—			—
Change in fair value recorded in OCI - Non-credit OTTI on AFS securities	6			—			—
Change in fair value recorded in earnings - Derivatives and hedging activities	—			(5		)	—
Paydowns and settlements	(3		)	—			—
Balance at end of period	$	73		$	27		$	(76	)
Total unrealized gains (losses) recorded in earnings (derivatives and hedging activities) and attributable to instruments still held at period end	$	—		$	—		$	5
For the three months ended March 31, 2012
Balance at beginning of period	$	63		$	37		$	(87	)
Gains (losses) realized and unrealized:
Change in fair value recorded in earnings - Derivatives and hedging activities	—			(5		)	5
Change in fair value recorded in OCI - Non-credit OTTI on AFS securities	5			—			—
Paydowns and settlements	(2		)	—			—
Balance at end of period	$	66		$	32		$	(82	)
Total unrealized gains (losses) recorded in earnings (derivatives and hedging activities) and attributable to instruments still held at period end	$	—		$	(5	)	$	5

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

	March 31, 2013						December 31, 2012
	Level 1		Level  2		Level  3		Level 1		Level  2		Level  3
Impaired MPF Loans	$	—	$	—	$	205	$	—	$	—	$	212
Real estate owned	—		—		13		—		—		18
Total non-recurring assets	$	—	$	—	$	218	$	—	$	—	$	230

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: 

	March 31, 2013								March 31, 2012
			Consolidated Obligation								Consolidated Obligation
	Advances		Bonds			Discount Notes			Advances		Bonds			Discount Notes
For the three months ended
Balance beginning of period	$	9	$	(1,251	)	$	—		$	9	$	(2,631	)	$	(11,466	)
New transactions elected for fair value option	—		(250		)	(75		)	—		(2,325		)	—
Maturities and extinguishments	—		250			—			—		1,820			2,200
Net gain (loss) on instruments held at fair value	—		1			—			—		4			2
Change in accrued interest and other	—		—			—			—		—			(4		)
Balance end of period	$	9	$	(1,250	)	$	(75	)	$	9	$	(3,132	)	$	(9,268	)

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.

	March 31, 2013						December 31, 2012
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	1,250		1,250		—		1,250		1,251		1
Consolidated obligation discount notes	75		75		—		—		—		—

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Consolidated Obligations Consolidated obligation bonds by maturity date (Details) (Consolidated Obligation Bonds [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Extinguishment of Debt [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	$ 7,096
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	4,491
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months, Weighted Average Interest Rate	2.83%
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	2,621
Long-term Debt, Maturities, Repayments of Principal in Year Two, Weighted Average Interest Rate	4.24%
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	2,663
Long-term Debt, Maturities, Repayments of Principal in Year Three, Weighted Average Interest Rate	2.72%
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	4,706
Long-term Debt, Maturities, Repayments of Principal in Year Four, Weighted Average Interest Rate	4.16%
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	13,342
Long-term Debt, Maturities, Repayments of Principal in Year Five, Weighted Average Interest Rate	2.56%
Long-term Debt, Maturities, Repayments of Principal After Year Five, Weighted Average Interest Rate	2.19%
Debt, Gross	34,919	32,659
Long-term Debt, Weighted Average Interest Rate	2.82%
Earlier of Contractual Maturity or Next Call Date [Member]
Extinguishment of Debt [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	22,306
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	4,941
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	1,896
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	2,143
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	2,276
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	1,357
Debt, Gross	$ 34,919

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Fair Value Accounting

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Fair Value Accounting [Text Block]

Fair Value Accounting

Fair Value Measurement

For our accounting policies regarding fair values see Note 2 - Summary of Significant Accounting Policies to the financial statements in our 2012 Form 10-K.

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 18 - Fair Value Accounting to the financial statements in our 2012 Form 10-K. There have been no significant changes in our valuation techniques since then.

Financial instruments carried at fair value in our statements of condition using Level 3 significant inputs were immaterial at March 31, 2013.

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. 

	March 31, 2013
			Fair Value
	Carrying  Value		Total		Level 1		Level 2			Level 3			Netting Adjustment/ Cash Collateral a
Financial Assets
Cash and due from banks	$	442	$	442	$	442	$	—		$	—		$	—
Federal Funds sold	926		926		—		926			—			—
Securities purchased under agreements to resell	5,835		5,835		—		5,835			—			—
Trading securities	1,976		1,976		—		1,976			—			—
Available-for-sale securities	23,004		23,004		—		22,931			73			—
Held-to-maturity securities	8,397		9,309		—		7,540			1,769			—
Advances	14,403		14,663		—		14,663			—			—
MPF Loans held in portfolio, net	9,653		10,395		—		10,190			205			—
Accrued interest receivable	106		106		—		106			—			—
Derivative assets	42		42		—		1,061		b	27		b	(1,046		)
Financial Liabilities
Deposits	$	819	$	819	$	—	$	819		$	—		$	—
Consolidated obligations -
Discount notes	24,292		24,292		—		24,292			—			—
Bonds	34,751		36,320		—		36,244			76		c	—
Accrued interest payable	287		287		—		287			—			—
Mandatorily redeemable capital stock	4		4		4		—			—			—
Derivative liabilities	79		79		—		2,567			—			(2,488		)
Subordinated notes	1,000		1,155		—		1,155			—			—

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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, 2012
			Fair Value
	Carrying  Value		Total		Level 1		Level 2			Level 3			Netting Adjustment/ Cash Collateral a
Financial Assets
Cash and due from banks	$	3,564	$	3,564	$	3,564	$	—		$	—		$	—
Securities purchased under agreements to resell	6,500		6,500		—		6,500			—			—
Trading securities	1,229		1,229		—		1,229			—			—
Available-for-sale securities	23,454		23,454		—		23,385			69			—
Held-to-maturity securities	9,567		10,482		—		8,706			1,776			—
Advances	14,530		14,802		—		14,802			—			—
MPF Loans held in portfolio, net	10,432		11,227		—		11,015			212			—
Accrued interest receivable	116		116		—		116			—			—
Derivative assets	47		47		—		1,160		b	32		b	(1,145		)
Financial Liabilities
Deposits	$	816	$	816	$	—	$	816		$	—		$	—
Consolidated obligations -
Discount notes	31,260		31,262		—		31,262			—			—
Bonds	32,569		34,323		—		34,241			82		c	—
Accrued interest payable	156		156		—		156			—			—
Mandatorily redeemable capital stock	6		6		6		—			—			—
Derivative liabilities	82		82		—		2,778			—			(2,696		)
Subordinated notes	1,000		1,162		—		1,162			—			—

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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.

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 March 31, 2013	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	1,868			$	—			$	—		$	1,868
GSE residential MBS	—		106				—				—			106
Governmental-guaranteed residential MBS	—		2				—				—			2
Total Trading Securities	—		1,976				—				—			1,976
AFS securities:
U.S. Government & other government related	—		706				—				—			706
FFELP ABS	—		7,290				—				—			7,290
GSE residential MBS	—		12,019				—				—			12,019
Government-guaranteed residential MBS	—		2,916				—				—			2,916
Private-label residential MBS	—		—				73				—			73
Total AFS Securities	—		22,931				73				—			23,004
Advances	—		9				—				—			9
Derivative assets	—		1,061			b	27			b	(1,046		)	42
Total assets at fair value	$	—	$	25,977			$	100			$	(1,046	)	$	25,031
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation discount notes	$	—	$	(75	)		$	—			$	—		$	(75	)
Consolidated obligation bonds	—		(1,250		)		(76		)	c	—			(1,326		)
Derivative liabilities	—		(2,567		)	b	—				2,488			(79		)
Total liabilities at fair value	$	—	$	(3,892	)		$	(76	)		$	2,488		$	(1,480	)
Level 3 as a percent of total liabilities at fair value							5.1		%

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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, 2012	Level 1		Level 2				Level 3				Netting Adjustment a			Total
Assets -
Trading securities:
U.S. Government & other government related	$	—	$	1,106			$	—			$	—		$	1,106
GSE residential MBS	—		120				—				—			120
Governmental-guaranteed residential MBS	—		3				—				—			3
Total Trading Securities	—		1,229				—				—			1,229
AFS securities:
U.S. Government & other government related	—		754				—				—			754
FFELP ABS	—		7,453				—				—			7,453
GSE residential MBS	—		12,228				—				—			12,228
Government-guaranteed residential MBS	—		2,950				—				—			2,950
Private-label residential MBS	—		—				69				—			69
Total AFS Securities	—		23,385				69				—			23,454
Advances	—		9				—				—			9
Derivative assets	—		1,160			b	32			b	(1,145		)	47
Total assets at fair value	$	—	$	25,783			$	101			$	(1,145	)	$	24,739
Level 3 as a percent of total assets at fair value							0.4		%
Liabilities -
Consolidated obligation bonds	—		(1,251		)		(82		)	c	—			(1,333		)
Derivative liabilities	—		(2,778		)	b	—				2,696			(82		)
Total liabilities at fair value	$	—	$	(4,029	)		$	(82	)		$	2,696		$	(1,415	)
Level 3 as a percent of total liabilities at fair value							5.8		%

^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. See Note 9 - Derivatives and Hedging Activities for further details.

^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
For the three months ended March 31, 2013
Balance at beginning of period	$	69		$	32		$	(82	)
Gains (losses) realized and unrealized:
Change in fair value recorded in earnings - Instruments held under fair value option	—			—			6
Recorded in earnings in interest income	1			—			—
Change in fair value recorded in OCI - Non-credit OTTI on AFS securities	6			—			—
Change in fair value recorded in earnings - Derivatives and hedging activities	—			(5		)	—
Paydowns and settlements	(3		)	—			—
Balance at end of period	$	73		$	27		$	(76	)
Total unrealized gains (losses) recorded in earnings (derivatives and hedging activities) and attributable to instruments still held at period end	$	—		$	—		$	5
For the three months ended March 31, 2012
Balance at beginning of period	$	63		$	37		$	(87	)
Gains (losses) realized and unrealized:
Change in fair value recorded in earnings - Derivatives and hedging activities	—			(5		)	5
Change in fair value recorded in OCI - Non-credit OTTI on AFS securities	5			—			—
Paydowns and settlements	(2		)	—			—
Balance at end of period	$	66		$	32		$	(82	)
Total unrealized gains (losses) recorded in earnings (derivatives and hedging activities) and attributable to instruments still held at period end	$	—		$	(5	)	$	5

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.

	March 31, 2013						December 31, 2012
	Level 1		Level  2		Level  3		Level 1		Level  2		Level  3
Impaired MPF Loans	$	—	$	—	$	205	$	—	$	—	$	212
Real estate owned	—		—		13		—		—		18
Total non-recurring assets	$	—	$	—	$	218	$	—	$	—	$	230

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: 

	March 31, 2013								March 31, 2012
			Consolidated Obligation								Consolidated Obligation
	Advances		Bonds			Discount Notes			Advances		Bonds			Discount Notes
For the three months ended
Balance beginning of period	$	9	$	(1,251	)	$	—		$	9	$	(2,631	)	$	(11,466	)
New transactions elected for fair value option	—		(250		)	(75		)	—		(2,325		)	—
Maturities and extinguishments	—		250			—			—		1,820			2,200
Net gain (loss) on instruments held at fair value	—		1			—			—		4			2
Change in accrued interest and other	—		—			—			—		—			(4		)
Balance end of period	$	9	$	(1,250	)	$	(75	)	$	9	$	(3,132	)	$	(9,268	)

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.

	March 31, 2013						December 31, 2012
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	1,250		1,250		—		1,250		1,251		1
Consolidated obligation discount notes	75		75		—		—		—		—

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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Off-Balance Sheet Commitments [Table Text Block]

The table below shows our commitments outstanding but not yet incurred or recorded in our statements of condition. Except for an immaterial amount of MPF Loans being acquired for our portfolio under our affordable housing program, the mortgage purchase commitments in the below table will be concurrently resold to Fannie Mae under our MPF Xtra product.

As of	March 31, 2013						December 31, 2012
	Expire within one year		Expire after one year		Total		Expire within one year		Expire after one year		Total
Unsettled consolidated obligation bonds	$	2,398	$	—	$	2,398	$	175	$	—	$	175
Member standby letters of credit	857		757		1,614		689		725		1,414
Housing authority standby bond purchase agreements	16		350		366		50		382		432
MPF Program mortgage purchase commitments	379		—		379		497		—		497
Repurchasable loans and indemnifications to Fannie Mae for MPF Xtra loans a	45		—		45		39		—		39
Advance commitments	4		319		323		—		285		285
Total	$	3,699	$	1,426	$	5,125	$	1,450	$	1,392	$	2,842

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Transactions with Members and Other FHLBs

3 Months Ended

Mar. 31, 2013

Related Party Transactions [Abstract]

Related Party Transactions Disclosure [Text Block]

Transactions with Members and Other FHLBs

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 and the MPF Program almost exclusively with members. Therefore, in the normal course of business, we extend credit to members whose officers and directors may serve as our directors. We extend credit to them on market terms that are no more favorable than the terms of comparable transactions with other members who are not considered related parties (as defined above). In addition, we may purchase short-term investments, sell Federal Funds to, and purchase MBS from members (or affiliates of members) whose officers or directors serve as our directors. All such investments are market rate transactions and all such MBS are purchased through securities brokers or dealers. As an additional service to our members, including those whose officers or directors serve as our directors, we may enter into interest rate derivatives with members and offset these derivatives with non-member counterparties. These transactions 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.

	March 31, 2013		December 31, 2012
Assets - Advances	$	2,513	$	2,500
Liabilities - Deposits	117		106
Equity - Capital Stock	226		239

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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Capital Stock and Mandatorily Redeemable Capital Stock (MRCS) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				0 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Common Class B [Member]	May 15, 2013 Scenario, Forecast [Member]	Mar. 31, 2013 Capital Stock Ownership By Third Party [Member] BMO Harris Bank N.A. [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital Stock Par Value	$ 100		$ 100	$ 100
Capital Stock, redemption, period of written notice	5 years
Payments for Repurchase of Common Stock	$ 100
Excess capital stock repurchased	96	499			200
Capital Stock Value, Including Mandatorily Redeemable Stock						$ 210
Concentration Risk, Percentage						14.00%

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Statements of Stockholders' Equity Statements of Capital Parenthetical	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Capital Unit [Line Items]
Common Stock Dividend - Rate per Share	0.30%	0.10%

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Statements of Condition (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financial Instruments Owned and Pledged as Collateral [Line Items]
Fair Value of Held-to-Maturity Securities	$ 9,309	$ 10,482
Advances Carried at Fair Value	9	9
Allowance for credit losses	(40)	(42)
Software and equipment, accumulated amortization/depreciation	(157)	(157)
Discount Notes Carried at Fair Value	75	0
Bonds Carried at Fair Value	$ 1,250	$ 1,251
Capital Stock Par Value	$ 100	$ 100
Subclass B-1 Shares Issued	1	1
Subclass B-2 Shares Issued	14	15
Subclass B-1 Shares Outstanding	1	1
Subclass B-2 Shares Outstanding	14	15

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Derivatives and Hedging Activities

3 Months Ended

Mar. 31, 2013

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 to the financial statements in our 2012 Form 10-K for our accounting policies for derivatives.

In December of 2011, and as amended in January 2013, the FASB issued new disclosure requirements pertaining to offsetting (netting) of assets and liabilities. We adopted these new disclosure requirements retrospectively for all comparative periods presented effective January 1, 2013. The requirements require disclosure of both gross information and net information related to only derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing regardless of whether we offset these transactions in our statement of condition. A description of the rights of setoff related to these financial instruments, including the nature of those rights, also are required to be disclosed. We do not have repurchase agreements and reverse repurchase agreements or securities borrowing and securities lending transactions that are subject to offset in our statement of condition. As a result, we are only providing the required disclosures related to derivative instruments, which can be found below.

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 18 - Fair Value Accounting to the financial statements in our 2012 Form 10-K 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 $69 million of collateral at fair value to our derivatives counterparties at March 31, 2013.

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. As of March 31, 2013, we delivered $1 million excess collateral on derivative liabilities. Netting adjustments represent the effect of legally enforceable master netting agreements that allow us to settle positive and negative positions.

	March 31, 2013									December 31, 2012
As of	Notional Amount		Derivative Assets				Derivative Liabilities			Notional Amount		Derivative Assets				Derivative Liabilities
Derivatives in hedge accounting relationships-
Interest rate swaps	$	27,746	$	86			$	1,985		$	24,678	$	103			$	2,107
Total	27,746		86				1,985			24,678		103				2,107
Derivatives not in hedge accounting relationships-
Interest rate swaps	15,004		650				572			13,352		691				656
Interest rate swaptions	5,510		139				—			8,690		160				—
Interest rate caps or floors	1,913		203				—			1,913		223				—
Mortgage delivery commitments	757		10				10			992		15				15
Total	23,184		1,002				582			24,947		1,089				671
Total before adjustments	$	50,930	1,088				2,567			$	49,625	1,192				2,778
Netting adjustments			(1,030		)		(1,030		)			(1,120		)		(1,120		)
Exposure at fair value			58			a	1,537					72			a	1,658
Cash collateral and related accrued interest			(16		)		(1,458		)			(25		)		(1,576		)
Derivative assets and liabilities			$	42			$	79				$	47			$	82

^a  Includes net accrued interest receivable of $8 million as of March 31, 2013, and $1 million as of December 31, 2012.

The following table shows the offsetting of derivative assets and liabilities for derivative instruments with legal right of offset as well as derivative instruments without the legal right of offset (i.e., mortgage delivery commitments):

	March 31, 2013						December 31, 2012
As of	Derivative Assets			Derivative Liabilities			Derivative Assets			Derivative Liabilities
Gross recognized amount	$	1,078		$	2,557		$	1,177		$	2,763
Gross amounts of netting adjustments and cash collateral	(1,046		)	(2,488		)	(1,145		)	(2,696		)
Net amounts after offsetting adjustments	32			69			32			67
Derivatives without legal right of offset	10			10			15			15
Total derivatives recorded in Statements of Condition	42			79			47			82
Noncash collateral received or pledged and not offset-
Cannot be sold or repledged	30			—			30			—
Net unsecured amount	$	12		$	79		$	17		$	82

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

	Three months ended March 31,
For the periods ending	2013			2012
Fair value hedges -
Interest rate swaps	$	2		$	4
Other	—			1
Fair value hedges - ineffectiveness net gain (loss)	2			5
Cash flow hedges - ineffectiveness net gain (loss)	1			2
Economic hedges -
Interest rate swaps	11			(2		)
Interest rate swaptions	(6		)	—
Interest rate caps/floors	(19		)	(13		)
Net interest settlements	13			19
Economic hedges - net gain (loss)	(1		)	4
Net gains (losses) on derivatives and hedging activities	$	2		$	11

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 Ineffectiveness Gain (Loss) Recognized in Derivatives and Hedging Activities			Net Interest Settlements Effect on Net Interest Income a			Hedge Adjustments Amortized into Net Interest Income b
Three months ended March 31, 2013
Hedged item type -
Available-for-sale securities	$	56		$	(55	)	$	1		$	(34	)	$	—
Advances	26			(23		)	3			(17		)	(1		)
MPF Loans held for portfolio	—			—			—			—			(10		)
Consolidated obligation bonds	(87		)	85			(2		)	47			(7		)
Total	$	(5	)	$	7		$	2		$	(4	)	$	(18	)
Three months ended March 31, 2012
Hedged item type -
Available-for-sale securities	$	36		$	(34	)	$	2		$	(32	)	$	—
Advances	8			(5		)	3			(24		)	(23		)
MPF Loans held for portfolio	(1		)	2			1			(1		)	(14		)
Consolidated obligation bonds	(24		)	23			(1		)	38			(9		)
Total	$	19		$	(14	)	$	5		$	(19	)	$	(46	)

^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.

	Amortization of 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		Change in OCI			Net Interest Settlements Effect on Net Interest Income a
Three months ended March 31, 2013
Advances - interest rate floors	$	3		$	—	$	3		$	—	$	(3	)	$	—
Discount notes - interest rate swaps	(1		)	1		—			88		88			(67		)
Total	$	2		$	1	$	3		$	88	$	85		$	(67	)
Three months ended March 31, 2012
Advances - interest rate floors	$	4		$	—	$	4		$	—	$	(4	)	$	—
Discount notes - interest rate caps	(2		)	—		(2		)	—		2			—
Discount notes - interest rate swaps	(1		)	2		1			52		51			(67		)
Bonds - interest rate swaps	(2		)	—		(2		)	—		2			—
Total	$	(1	)	$	2	$	1		$	52	$	51		$	(67	)

^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.

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 March 31, 2013. 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 7 years.

XML

Document and Entity Information Document	3 Months Ended
	Mar. 31, 2013	Apr. 30, 2013
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	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		16,170,454
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

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Consolidated Obligations

3 Months Ended

Mar. 31, 2013

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 March 31, 2013	Contractual Maturity		Weighted Average Interest Rate		Next Maturity or Call Date
Due in one year or less	$	7,096	2.83	%	$	22,306
One to two years	4,491		4.24	%	4,941
Two to three years	2,621		2.72	%	1,896
Three to four years	2,663		4.16	%	2,143
Four to five years	4,706		2.56	%	2,276
Thereafter	13,342		2.19	%	1,357
Total par value	$	34,919	2.82	%	$	34,919

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 March 31, 2013	$	24,292	$	24,298	0.13	%
As of December 31, 2012	31,260		31,269		0.13	%

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

As of	March 31, 2013			December 31, 2012
Noncallable	$	18,669		$	19,179
Callable	16,250			13,480
Total par value	34,919			32,659
Bond premiums (discounts), net	14			13
Hedging adjustments	(182		)	(104		)
Fair value option adjustments	—			1
Total consolidated obligation bonds	$	34,751		$	32,569

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Statements of Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Interest income	$ 403	$ 525
Interest expense	290	366
Net interest income before provision for credit losses	113	159
Provision for credit losses	0	6
Net interest income	113	153
Non-interest gain (loss) on -
Total other-than-temporary impairment	0	(2)
Net non-credit portion reclassified to (from) statements of comprehensive income	0	1
Net other-than-temporary impairment (OTTI) charges, credit portion	0	(1)
Trading securities	(6)	(14)
Derivatives and hedging activities	2	11
Instruments held under fair value option	1	6
Other, net	4	4
Total non-interest gain (loss)	1	6
Non-interest expense -
Compensation and benefits	14	15
Other operating expenses	9	9
FHFA	1	2
Office of Finance	1	1
Other	0	3
Total non-interest expense	25	30
Income before assessments	89	129
Assessments -
Affordable Housing Program	9	13
Net Income	$ 80	$ 116

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Interest Income and Interest Expense

3 Months Ended

Mar. 31, 2013

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 March 31,
	2013		2012
Interest income -
Federal Funds sold	$	1	$	1
Securities purchased under agreements to resell	2		1
Interest bearing deposits	1		—
Investment securities -
Trading	6		17
Available-for-sale	149		165
Held-to-maturity	90		114
Total investment securities	245		296
Advances	36		48
Advance prepayment fees, net of fair value hedge adjustments of $0 and $(22)	5		26
Total Advances	41		74
MPF Loans held in portfolio, net	113		153
Total interest income	403		525
Interest expense -
Consolidated obligations -
Discount notes	77		76
Bonds	199		276
Total consolidated obligations	276		352
Subordinated notes	14		14
Total interest expense	290		366
Net interest income before provision for credit losses	113		159
Provision for credit losses	—		6
Net interest income	$	113	$	153

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Recently Issued but Not Yet Adopted Accounting Standards

3 Months Ended

Mar. 31, 2013

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

Joint and Several Liability Arrangements

In February of 2013, the FASB issued new accounting guidance for obligations resulting from joint and several liability arrangements, except for obligations otherwise accounted for elsewhere within GAAP, such as guarantees. The new guidance requires us to measure obligations from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date. Further, any additional estimated amount we expect to pay on behalf of other FHLBs also would be recognized at the reporting date. The accounting for our guarantee to other FHLBs is scoped out of the new guidance, and accordingly, our existing accounting of our guarantee as a related party guarantee will not change. The new guidance becomes effective January 1, 2014 and is required to be applied retrospectively to all prior periods presented for our obligations that exist as of January 1, 2014. Earlier adoption is permitted. The new guidance is not expected to have an effect on our operating activities or financial statements. For further discussion of our joint and several liability see Note 11 - Consolidated Obligations to the financial statements in our 2012 Form 10-K.

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 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. On December 3, 2012, the FHFA issued questions and answers regarding AB 2012-02 that clarified various implementation issues including the date by which the guidance must be fully implemented, which is January 1, 2014. Our transition to AB 2012-02 will be on a prospective basis. AB 2012-02 establishes a standard and uniform methodology for classifying assets, prescribes the timing of asset charge-offs (excluding investment securities), provides measurement guidance with respect to determining our allowance for credit losses, and fair value measurement guidance for real estate owned or “REO” (e.g., use of appraisals). We are in the process of determining the financial statement effects of implementing AB 2012-02.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies [Text Block]

Commitments and Contingencies

The table below shows our commitments outstanding but not yet incurred or recorded in our statements of condition. Except for an immaterial amount of MPF Loans being acquired for our portfolio under our affordable housing program, the mortgage purchase commitments in the below table will be concurrently resold to Fannie Mae under our MPF Xtra product.

As of	March 31, 2013						December 31, 2012
	Expire within one year		Expire after one year		Total		Expire within one year		Expire after one year		Total
Unsettled consolidated obligation bonds	$	2,398	$	—	$	2,398	$	175	$	—	$	175
Member standby letters of credit	857		757		1,614		689		725		1,414
Housing authority standby bond purchase agreements	16		350		366		50		382		432
MPF Program mortgage purchase commitments	379		—		379		497		—		497
Repurchasable loans and indemnifications to Fannie Mae for MPF Xtra loans a	45		—		45		39		—		39
Advance commitments	4		319		323		—		285		285
Total	$	3,699	$	1,426	$	5,125	$	1,450	$	1,392	$	2,842

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Subordinated Notes

3 Months Ended

Mar. 31, 2013

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 13 - Subordinated Notes to the financial statements in our 2012 Form 10-K.

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MPF Loans

3 Months Ended

Mar. 31, 2013

Mortgage Loans on Real Estate [Abstract]

MPF Loans [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	March 31, 2013			December 31, 2012
Medium term (15 years or less)	$	2,301		$	2,557
Long term (greater than 15 years)	7,271			7,783
Total unpaid principal balance	9,572			10,340
Net premiums, credit enhancement and deferred loan fees	33			37
Hedging adjustments	88			97
Total before allowance for credit losses	9,693			10,474
Allowance for credit losses	(40		)	(42		)
Total MPF Loans held in portfolio, net	$	9,653		$	10,432
Conventional mortgage loans	$	7,612		$	8,260
Government insured mortgage loans	1,960			2,080
Total unpaid principal balance	$	9,572		$	10,340

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 (Derivatives in Statement of Condition) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Interest Receivable	$ 106		$ 116
Notional Amount of Derivatives Designated as Hedging Instruments	27,746		24,678
Derivative Assets Designated as Hedging Instruments	86		103
Derivative Liabilities Designated as Hedging Instruments	1,985		2,107
Notional Amount of Derivativs Not Designated ad Hedging Instruments	23,184		24,947
Derivativs Assets Not Designated as Hedging Instruments	1,002		1,089
Derivativs Liabilities Not Designated as Hedging Instruments	582		671
Notional Amount of Derivatives	50,930		49,625
Derivative Assets, Before Netting and Collateral Adjustments	1,088		1,192
Derivative Liabilities, Before Netting and Collateral Adjustments	2,567		2,778
Derivative Asset, Fair Value, Amount Not Offset Against Cash and Securities Collateral	58	[1]	72	[1]
Derivative Liabilities, Fair Value, Amount Not Offset Against Cash and Securities Collateral	1,537		1,658
Derivative assets	42		47
Financial Instruments Owned and Pledged as Collateral, Amount Not Eligible to be Repledged by Counterparty	0		0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	12		17
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	79		82
Derivative liabilities	79		82
Netting Adjustment by Counterparty [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral	(1,030)		(1,120)
Derivative Liability, Fair Value, Amount Offset Against Collateral	(1,030)		(1,120)
Cash Collateral and Related Accrued Interest [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral	(16)		(25)
Derivative Liability, Fair Value, Amount Offset Against Collateral	(1,458)		(1,576)
Derivative Financial Instruments, Assets [Member]
Derivatives, Fair Value [Line Items]
Interest Receivable	8		1
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives Designated as Hedging Instruments	27,746		24,678
Derivative Assets Designated as Hedging Instruments	86		103
Derivative Liabilities Designated as Hedging Instruments	1,985		2,107
Notional Amount of Derivativs Not Designated ad Hedging Instruments	15,004		13,352
Derivativs Assets Not Designated as Hedging Instruments	650		691
Derivativs Liabilities Not Designated as Hedging Instruments	572		656
Interest Rate Swaption [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivativs Not Designated ad Hedging Instruments	5,510		8,690
Derivativs Assets Not Designated as Hedging Instruments	139		160
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	203		223
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	757		992
Derivativs Assets Not Designated as Hedging Instruments	10		15
Derivativs Liabilities Not Designated as Hedging Instruments	$ 10		$ 15

[1] a Includes net accrued interest receivable of $8 million as of March 31, 2013, and $1 million as of December 31, 2012.

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Investment Securities

3 Months Ended

Mar. 31, 2013

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. We may pledge investment securities as collateral under these agreements, and in such cases, the amount pledged will be noted on the face of the Statements of Condition. We did not pledge any investment securities as collateral as of March 31, 2013 and December 31, 2012. 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	March 31, 2013		December 31, 2012
U.S. Government & other government related	$	1,868	$	1,106
MBS:
GSE residential	106		120
Government-guaranteed residential	2		3
Total MBS	108		123
Total trading securities	$	1,976	$	1,229

At March 31, 2013, and 2012, we had net year-to-date unrealized gains (losses) of $(6) million and $(14) 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			Carrying and Fair Value
As of March 31, 2013
U.S. Government & other government related	$	648	$	—		$	58	$	—		$	706
FFELP ABS	6,794		—			509		(13		)	7,290
MBS:
GSE residential	11,265		—			800		(46		)	12,019
Government-guaranteed residential	2,732		—			184		—			2,916
Private-label residential	76		(2		)	—		(1		)	73
Total MBS	14,073		(2		)	984		(47		)	15,008
Total	$	21,515	$	(2	)	$	1,551	$	(60	)	$	23,004
As of December 31, 2012
U.S. Government & other government related	$	690	$	—		$	64	$	—		$	754
FFELP ABS	6,958		—			508		(13		)	7,453
MBS:
GSE residential	11,402		—			880		(54		)	12,228
Government-guaranteed residential	2,758		—			192		—			2,950
Private-label residential	78		(8		)	—		(1		)	69
Total MBS	14,238		(8		)	1,072		(55		)	15,247
Total	$	21,886	$	(8	)	$	1,644	$	(68	)	$	23,454

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 March 31, 2013
U.S. Government & other government related	$	1,739	$	—		$	1,739	$	134	$	—		$	1,873
State or local housing agency	24		—			24		—		—			24
MBS:
GSE residential	3,936		—			3,936		330		—			4,266
Government-guaranteed residential	1,321		—			1,321		56		—			1,377
Private-label residential	1,743		(366		)	1,377		394		(2		)	1,769
Total MBS	7,000		(366		)	6,634		780		(2		)	7,412
Total	$	8,763	$	(366	)	$	8,397	$	914	$	(2	)	$	9,309
As of December 31, 2012
U.S. Government & other government related	$	2,487	$	—		$	2,487	$	139	$	—		$	2,626
State or local housing agency	24		—			24		—		—			24
MBS:
GSE residential	4,282		—			4,282		377		—			4,659
Government-guaranteed residential	1,340		—			1,340		57		—			1,397
Private-label residential	1,815		(381		)	1,434		348		(6		)	1,776
Total MBS	7,437		(381		)	7,056		782		(6		)	7,832
Total	$	9,948	$	(381	)	$	9,567	$	921	$	(6	)	$	10,482

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 March 31, 2013
FFELP ABS	$	—	$	—	$	1,055	$	(13	)		$	1,055	$	(13	)
MBS:
GSE residential	—		—		3,504		(46		)		3,504		(46		)
Private-label residential	—		—		68		(3		)	a	68		(3		)	a
Total MBS	—		—		3,572		(49		)		3,572		(49		)
Total available-for-sale securities	$	—	$	—	$	4,627	$	(62	)		$	4,627	$	(62	)
As of December 31, 2012
FFELP ABS	$	—	$	—	$	1,079	$	(13	)		$	1,079	$	(13	)
MBS:
GSE residential	40		—		3,540		(54		)		3,580		(54		)
Private-label residential	—		—		69		(9		)	a	69		(9		)	a
Total MBS	40		—		3,609		(63		)		3,649		(63		)
Total available-for-sale securities	$	40	$	—	$	4,688	$	(76	)		$	4,728	$	(76	)

^a  Includes $52 million and $45 million of gross unrealized/unrecognized recoveries in fair value at March 31, 2013, and at December 31, 2012.

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 March 31, 2013
Private-label residential MBS Held-to-Maturity	$	—	$	—	$	1,626	$	(368	)	$	1,626	$	(368	)
As of December 31, 2012
Private-label residential MBS Held-to-maturity	$	—	$	—	$	1,640	$	(387	)	$	1,640	$	(387	)

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 March 31, 2013	Amortized Cost		Fair  Value		Carrying Value		Fair  Value
Year of Maturity -
Due in one year or less	$	—	$	—	$	62	$	63
Due after one year through five years	87		92		52		53
Due after five years through ten years	99		107		474		504
Due after ten years	462		507		1,175		1,277
Total non-ABS/MBS	648		706		1,763		1,897
ABS and MBS	20,867		22,298		6,634		7,412
Total securities	$	21,515	$	23,004	$	8,397	$	9,309

Other-Than-Temporary Impairment

We recognize 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 are 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. For the three months ended March 31, 2013, we had no OTTI charges.

Significant Inputs Used to Determine OTTI

Our analysis for OTTI on 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.

As of March 31, 2013, we developed a housing price forecast with seven short-term projections with changes ranging from -4.0% to +4.0% over the twelve month period beginning January 1, 2013. For the vast majority of markets, the short-term forecast has changes from -1.0% to +1.0%.  Thereafter, home prices were projected to recover using one of five different recovery paths.

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

As of March 31, 2013	Recovery Range Annualized %
Months	Low	High
1-6	0.0%	3.0%
7-12	1.0%	4.0%
13-18	2.0%	4.0%
19-30	2.0%	5.0%
31-42	2.0%	6.0%
43-54	2.0%	6.0%
Thereafter	2.3%	5.6%

Based on these inputs and assumptions for the three months ended March 31, 2013, we had no OTTI charges.

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. In this 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 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. 

As of March 31, 2013	Unpaid Principal Balance		Amortized Cost Basis		Carrying Value		Fair Value
Private-label residential MBS:
Alt-A	$	114	$	74	$	72	$	72
Total OTTI AFS securities	$	114	$	74	$	72	$	72
Private-label residential MBS:
Prime	$	1,305	$	1,014	$	755	$	997
Subprime	798		513		406		555
Total OTTI HTM securities	$	2,103	$	1,527	$	1,161	$	1,552

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Advances

3 Months Ended

Mar. 31, 2013

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	March 31, 2013		December 31, 2012
Noncallable/nonputable	$	11,369	$	11,616
Callable	933		776
Putable	1,935		1,948
Total par value	14,237		14,340
Hedging adjustments	141		166
Other adjustments	25		24
Total advances	$	14,403	$	14,530

The following table presents our advances by redemption terms:

As of March 31, 2013	Amount		Weighted Average Interest Rate		Next Maturity or Call Date		Next Maturity or Put Date
Due in one year or less	$	5,177	0.55	%	$	6,104	$	7,100
One to two years	1,165		2.06	%	1,070		1,163
Two to three years	1,167		2.50	%	967		727
Three to four years	1,579		3.41	%	1,379		1,058
Four to five years	4,132		1.19	%	3,755		3,362
More than five years	1,017		2.94	%	962		827
Total par value	$	14,237	1.51	%	$	14,237	$	14,237

Credit Risk Concentration and Collateral Pledged

The following advance borrowers exceeded 10% of our total advances outstanding:

As of March 31, 2013	Par Value Outstanding		% of Total
BMO Harris Bank N.A.	$	2,375	17	%
State Farm Bank, F.S.B	1,500		11	%

We lend to members within our district according to Federal statutes, including the FHLB Act. The FHLB Act requires us to hold, or have access to, collateral to secure our advances, and we do not expect to incur any credit losses on advances. We have policies and procedures in place that are designed to manage our credit risk, including requirements for physical possession or control of pledged collateral, restrictions on borrowing, verifications of collateral and continuous monitoring of borrowings and the member's financial condition. We continue to monitor the collateral and creditworthiness of our borrowers. Based on the collateral pledged as security for advances and our credit analyses of our members' financial condition and our credit extension and collateral policies, we expect to collect all amounts due according to the contractual terms of our advances. See Note 8 - Allowance for Credit Losses for information related to our credit risk on advances and allowance methodology for credit losses.

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Allowance for Credit Losses

3 Months Ended

Mar. 31, 2013

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 8 - Allowance for Credit Losses to the financial statements in our 2012 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 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 2012 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. For detailed definitions of how Total Severity Rate and Credit Loss Severity Rate are calculated, see Loss Severity on page F-38 in our 2012 Form 10-K.

As of	March 31, 2013			December 31, 2012
Total Severity Rate	37.0		%	38.0		%
Credit Loss Severity Rate	21.0		%	22.0		%
Total estimated losses outstanding	$	83		$	88
Less: losses expected to be absorbed by MPF Risk Sharing Structure a	(21		)	(23		)
Our share of total losses	62			65
Less: non-credit losses	(27		)	(27		)
Credit losses	35			38
Plus: other estimated credit losses in the remaining portfolio	5			4
Allowance for credit losses on conventional MPF Loans	$	40		$	42

^a  Represents aggregate of credit enhancements across all master commitments expected to be recovered. Credit enhancement from one master commitment may not be used to offset credit losses incurred by another master commitment.

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

	March 31, 2013			March 31, 2012
For the three months ended
Allowance for credit losses on conventional MPF Loans-
Balance, beginning of period	$	42		$	45
Losses charged to the allowance	(2		)	(2		)
Provision for credit losses	—			6
Balance, end of period	$	40		$	49
As of	March 31, 2013			December 31, 2012
Specifically identified and individually evaluated for impairment	$	30		$	30
Homogeneous pools of loans and collectively evaluated for impairment	10			12
Allowance assigned to conventional MPF Loan	$	40		$	42
Individually evaluated for impairment - with an allowance	$	222		$	230
Collectively evaluated for impairment	7,534			8,190
Recorded Investment in Conventional MPF Loans	$	7,756		$	8,420

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 or disclosed as troubled debt restructurings.

Credit Quality Indicators - MPF Loans

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

	March 31, 2013									December 31, 2012
As of	Conventional			Government			Total			Conventional			Government			Total
Past due 30-59 days	$	191		$	114		$	305		$	180		$	116		$	296
Past due 60-89 days	56			31			87			59			42			101
Past due 90 days or more	248			197			445			254			208			462
Total past due	495			342			837			493			366			859
Total current	7,261			1,644			8,905			7,927			1,741			9,668
Total recorded investment	$	7,756		$	1,986		$	9,742		$	8,420		$	2,107		$	10,527
In process of foreclosure	$	141		$	74		$	215		$	149		$	76		$	225
Serious delinquency rate a	3.21		%	9.95		%	4.58		%	3.03		%	9.86		%	4.40		%
Past due 90 days or more still accruing interest b	$	69		$	198		$	267		$	67		$	208		$	275
On nonaccrual status	$	226		$	—		$	226		$	234		$	—		$	234

^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

Effective December 31, 2012, we began characterizing MPF Loans as troubled debt restructurings in cases where they were discharged under Chapter 7 bankruptcy and they were not reaffirmed by the borrower, except for cases in which we expect to collect the recorded investment in full because of credit enhancements or government insurance or guarantees. We did not previously report these MPF Loans as troubled debt restructurings unless they were modified under our troubled debt restructuring modification program. In prior reporting periods, we reported these MPF Loans on nonaccrual status within 60 days of receipt of the notification of filing from the bankruptcy court. Further, we continue to include the recorded investment of these MPF Loans in our nonaccrual status reported amount, which means these MPF Loans are included in both categories for footnote disclosure purposes.

In the event a borrower qualifies for a troubled debt restructuring under our program, we 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.

The table below presents our recorded investment balance in troubled debt restructured loans as of the dates presented. The recorded investment balances for modified loans still in their trial period were immaterial. Performing includes modified loans that are accruing interest. Nonperforming includes modified loans that are on nonaccrual status.

	March 31, 2013						December 31, 2012
As of	Performing		Nonperforming		Total		Performing		Nonperforming		Total
Recorded investment in conventional MPF Loan TDRs	$	16	$	17	$	33	$	14	$	3	$	17

Our pre- and post-modification recorded investment in troubled debt restructurings during the quarter ended March 31, 2013, was $7 million and during the quarter ended March 31, 2012, was $1 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. Specifically, the modified terms do not fully take effect until after a three month trial period in which the borrower demonstrates an ability to pay under the modified terms during the trial period; however, we consider the conventional MPF Loan a troubled debt restructuring at the inception of the trial period. If the borrower fails to pay during the trial period, the payment terms revert back to the original agreement with the borrower. 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 from the previous 12 months that subsequently defaulted during the three months ending March 31, 2013, and 2012 were $8 million and $1 million. A borrower is considered to have defaulted on a troubled debt restructuring if contractually due principal or interest payment is sixty days past due at any time during the past 12 months. The amount of nonperforming troubled debt restructurings are less than the amount that have subsequently defaulted either because a defaulted troubled debt restructuring subsequently became current or was transferred to REO.

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.

	March 31, 2013						December 31, 2012
As of	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
Impaired conventional MPF Loans with an allowance	$	222	$	217	$	30	$	230	$	224	$	30

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

	March 31, 2013				March 31, 2012
For the periods ended	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Three months	$	224	$	—	$	202	$	2

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 (Cash Flow Hedges) (Details) (Cash Flow Hedges [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Interest	$ 2		$ (1)
Ineffective Portion Reclassified to Derivatives and Hedging Activities	1		2
Total Reclassified Into Statements of Income	3		1
Effective Portion Recorded in AOCI	88		52
Total Change in AOCI	85		51
Net Interest Settlements Effect on Net Interest Income	(67)	[1]	(67)
Advances [Member] | Interest Rate Floor [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Interest	3		4
Ineffective Portion Reclassified to Derivatives and Hedging Activities	0		0
Total Reclassified Into Statements of Income	3		4
Effective Portion Recorded in AOCI	0		0
Total Change in AOCI	(3)		(4)
Net Interest Settlements Effect on Net Interest Income	0	[1]	0
Consolidated Obligation Discount Notes [Member] | Interest Rate Cap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Interest			(2)
Ineffective Portion Reclassified to Derivatives and Hedging Activities			0
Total Reclassified Into Statements of Income			(2)
Effective Portion Recorded in AOCI			0
Total Change in AOCI			2
Net Interest Settlements Effect on Net Interest Income			0
Consolidated Obligation Discount Notes [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Interest	(1)		(1)
Ineffective Portion Reclassified to Derivatives and Hedging Activities	1		2
Total Reclassified Into Statements of Income	0		1
Effective Portion Recorded in AOCI	88		52
Total Change in AOCI	88		51
Net Interest Settlements Effect on Net Interest Income	(67)	[1]	(67)
Consolidated Obligation Bonds [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Interest			(2)
Ineffective Portion Reclassified to Derivatives and Hedging Activities			0
Total Reclassified Into Statements of Income			(2)
Effective Portion Recorded in AOCI			0
Total Change in AOCI			2
Net Interest Settlements Effect on Net Interest Income			$ 0

[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.

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Consolidated Obligations Consolidated obligation short term discount notes (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Short-term Debt [Line Items]
Other Short-term Borrowings	$ 24,292	$ 31,260
Short-term Debt, Weighted Average Interest Rate	0.13%	0.13%
Discount Notes [Member]
Short-term Debt [Line Items]
Debt Instrument, Face Amount	$ 24,298	$ 31,269

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Derivatives and Hedging Activities (Fair Value Hedges) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	$ 2		$ 5
Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	(5)		19
Gain (Loss) on Hedged Item	7		(14)
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	2		5
Effect of Derivatives on Net Interest Income	(4)	[1]	(19)
Amortization of Deferred Hedge Gains	(18)	[2]	(46)
AFS Securities [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	56		36
Gain (Loss) on Hedged Item	(55)		(34)
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	1		2
Effect of Derivatives on Net Interest Income	(34)	[1]	(32)
Amortization of Deferred Hedge Gains	0	[2]	0
Advances [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	26		8
Gain (Loss) on Hedged Item	(23)		(5)
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	3		3
Effect of Derivatives on Net Interest Income	(17)	[1]	(24)
Amortization of Deferred Hedge Gains	(1)	[2]	(23)
MPF Loans Held For Portfolio [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	0		(1)
Gain (Loss) on Hedged Item	0		2
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	0		1
Effect of Derivatives on Net Interest Income	0	[1]	(1)
Amortization of Deferred Hedge Gains	(10)	[2]	(14)
Consolidated Obligation Bonds [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative	(87)		(24)
Gain (Loss) on Hedged Item	85		23
Total Gain (Loss) Ineffectiveness Recognized in Derivatives and Hedging Activities	(2)		(1)
Effect of Derivatives on Net Interest Income	47	[1]	38
Amortization of Deferred Hedge Gains	$ (7)	[2]	$ (9)

[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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Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2013

Accumulated Other Comprehensive Income (Loss) [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	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, 2011	$	1,113		$	(26	)	$	(5	)	$	(466	)	$	(1,049	)	$	2	$	(431	)
Net change in the period	(32		)	5			1			19			51			—		44
Balance, March 31, 2012	$	1,081		$	(21	)	$	(4	)	$	(447	)	$	(998	)	$	2	$	(387	)
Balance, December 31, 2012	$	1,576		$	(8	)	$	(3	)	$	(381	)	$	(1,078	)	$	1	$	107
Change in the period before reclassifications to net income	(85		)	6			—			15			88			—		24
Period amounts reclassified from other comprehensive income (loss) to net income	—			—			1			—			(3		)	1		(1		)
Net change in the period	(85		)	6			1			15			85			1		23
Balance, March 31, 2013	$	1,491		$	(2	)	$	(2	)	$	(366	)	$	(993	)	$	2	$	130

The following table shows the amounts reclassified from AOCI to net income for the periods presented:

Three months ended March 31,	2013			Income Statement Location
Net unrealized gain (loss) on held-to-maturity securities a
Reclassification to net income	$	1		Interest income - HTM securities
Net unrealized gain (loss) on hedging activities
Reclassification of net realized (gains) losses to net income	(2		)	Net interest income
Reclassification of net realized (gains) losses to net income	(1		)	Non-interest gain (loss) - Derivatives and hedging activities
Post retirement plans - reclassification to net income	1			Non-interest expense - Compensation and benefits
Total other comprehensive income	$	(1	)

^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.

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Advances Advances by redemption terms (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Advances by redemption terms [Abstract]
Federal Home Loan Bank Advances, Maturities, Within One Year of Balance Sheet Date	$ 5,177
Federal Home Loan Bank Advances, Maturities, Due After One To Two Years of Balance Sheet Date	1,165
Federal Home Loan Bank Advances, Maturities, Due After Two To Three Years of Balance Sheet Date	1,167
Federal Home Loan Bank Advances, Maturities, Due After Three To Four Years of Balance Sheet Date	1,579
Federal Home Loan Bank Advances, Maturities, Due After Four To Five Years of Balance Sheet Date	4,132
Federal Home Loan Bank Advances, Maturities, After Five Years of Balance Sheet Date	1,017
Federal Home Loan Bank Advances, Weighted Average Interest Rate of Amounts Maturing Within One Year of Balance Sheet Date	0.55%
Federal Home Loan Bank Advances, Weighted Average Interest Rate of Amounts Maturing From One To Two Years of Balance Sheet Date	2.06%
Federal Home Loan Bank Advances, Weighted Average Interest Rate of Amounts Maturing From Two To Three Years of Balance Sheet Date	2.50%
Federal Home Loan Bank Advances, Weighted Average Interest Rate of Amounts Maturing From Three To Four Years of Balance Sheet Date	3.41%
Federal Home Loan Bank Advances, Weighted Average Interest Rate of Amounts Maturing From Four To Five Years of Balance Sheet Date	1.19%
Federal Home Loan Bank Advances, Weighted Average Interest Rate of Amounts Maturing After Five Years of Balance Sheet Date	2.94%
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Due within One Year of Balance Sheet Date	6,104
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Due From One To Two Years of Balance Sheet Date	1,070
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Due From Two To Three Years of Balance Sheet Date	967
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Due From Three To Four Years of Balance Sheet Date	1,379
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Due From Four To Five Years of Balance Sheet Date	3,755
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Due After Five Years of Balance Sheet Date	962
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put Date, Due within One Year of Balance Sheet Date	7,100
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put Date, Due From One To Two Years of Balance Sheet Date	1,163
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put Date, Due From Two To Three Years of Balance Sheet Date	727
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put Date, Due From Three To Four Years of Balance Sheet Date	1,058
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put Date, Due From Four To Five Years of Balance Sheet Date	3,362
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put Date, Due After Five Years of Balance Sheet Date	827
Federal Home Loan Bank Advances At Par Value	$ 14,237	$ 14,340
Federal Home Loan Bank Advances, Weighted Average Interest Rate As Of Balance Sheet Date	1.51%

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Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2013

Accumulated Other Comprehensive Income (Loss) [Line Items]

Comprehensive Income (Loss) Note [Text Block]

Accumulated Other Comprehensive Income (Loss)

AOCI Reclassification Disclosures

In February of 2012, the FASB amended existing accounting guidance to enhance the transparency of reporting amounts reclassified out of AOCI into net income. We adopted this amended guidance on a prospective basis effective January 1, 2013. The effects on the line items of net income of significant amounts reclassified out of AOCI in their entirety within the same reporting are presented below. Additionally, cross-references to other disclosures currently required for other reclassification items that are not required to be reclassified directly to net income in their entirety in the same reporting period also are presented below. The amendments do not change the current requirements for reporting net income or other comprehensive income. As a result, the amendments did not have any effect on our operating activities or financial statements at the time of adoption.

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, 2011	$	1,113		$	(26	)	$	(5	)	$	(466	)	$	(1,049	)	$	2	$	(431	)
Net change in the period	(32		)	5			1			19			51			—		44
Balance, March 31, 2012	$	1,081		$	(21	)	$	(4	)	$	(447	)	$	(998	)	$	2	$	(387	)
Balance, December 31, 2012	$	1,576		$	(8	)	$	(3	)	$	(381	)	$	(1,078	)	$	1	$	107
Change in the period before reclassifications to net income	(85		)	6			—			15			88			—		24
Period amounts reclassified from other comprehensive income (loss) to net income	—			—			1			—			(3		)	1		(1		)
Net change in the period	(85		)	6			1			15			85			1		23
Balance, March 31, 2013	$	1,491		$	(2	)	$	(2	)	$	(366	)	$	(993	)	$	2	$	130

The following table shows the amounts reclassified from AOCI to net income for the periods presented:

Three months ended March 31,	2013			Income Statement Location
Net unrealized gain (loss) on held-to-maturity securities a
Reclassification to net income	$	1		Interest income - HTM securities
Net unrealized gain (loss) on hedging activities
Reclassification of net realized (gains) losses to net income	(2		)	Net interest income
Reclassification of net realized (gains) losses to net income	(1		)	Non-interest gain (loss) - Derivatives and hedging activities
Post retirement plans - reclassification to net income	1			Non-interest expense - Compensation and benefits
Total other comprehensive income	$	(1	)

^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.

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Interest Income and Interest Expense (Tables)

3 Months Ended

Mar. 31, 2013

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 March 31,
	2013		2012
Interest income -
Federal Funds sold	$	1	$	1
Securities purchased under agreements to resell	2		1
Interest bearing deposits	1		—
Investment securities -
Trading	6		17
Available-for-sale	149		165
Held-to-maturity	90		114
Total investment securities	245		296
Advances	36		48
Advance prepayment fees, net of fair value hedge adjustments of $0 and $(22)	5		26
Total Advances	41		74
MPF Loans held in portfolio, net	113		153
Total interest income	403		525
Interest expense -
Consolidated obligations -
Discount notes	77		76
Bonds	199		276
Total consolidated obligations	276		352
Subordinated notes	14		14
Total interest expense	290		366
Net interest income before provision for credit losses	113		159
Provision for credit losses	—		6
Net interest income	$	113	$	153

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Investment Securities (Securities Other-than-Temporarily Impaired) (Details) (Private-label residential MBS [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013
AFS Securities [Member]
Investment Securities [Line Items]
Unpaid Principal Balance	$ 114
Amortized Cost	74
Carrying Value	72
Fair Value	72
HTM Securities [Member]
Investment Securities [Line Items]
Unpaid Principal Balance	2,103
Amortized Cost	1,527
Carrying Value	1,161
Fair Value	1,552
Alt-A [Member] | AFS Securities [Member]
Investment Securities [Line Items]
Unpaid Principal Balance	114
Amortized Cost	74
Carrying Value	72
Fair Value	72
Prime [Member] | HTM Securities [Member]
Investment Securities [Line Items]
Unpaid Principal Balance	1,305
Amortized Cost	1,014
Carrying Value	755
Fair Value	997
Subprime [Member] | HTM Securities [Member]
Investment Securities [Line Items]
Unpaid Principal Balance	798
Amortized Cost	513
Carrying Value	406
Fair Value	$ 555

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Investment Securities (Trading Securities) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Trading Securities [Line Items]
Trading securities	$ 1,976		$ 1,229
Net year-to-date unrealized gains (losses) on trading securities	(6)	(14)
U.S. Government & Other Government Related [Member]
Trading Securities [Line Items]
Trading securities	1,868		1,106
GSE residential MBS [Member]
Trading Securities [Line Items]
Trading securities	106		120
Government-guaranteed residential MBS [Member]
Trading Securities [Line Items]
Trading securities	2		3
MBS [Member]
Trading Securities [Line Items]
Trading securities	$ 108		$ 123

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Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 80		$ 116
Net unrealized gain (loss) on available-for-sale securities
Unrealized gains (losses)	(85)		(32)
Total net unrealized gain (loss) on available-for-sale securities	(85)		(32)
Net unrealized gain (loss) on held-to-maturity securities
Reclassification to net income	1	[1]	1	[1]
Total net unrealized gain (loss) on held-to-maturity securities	1	[1]	1	[1]
Non-credit OTTI on available-for-sale securities
Net change in fair value	6		5
Total non-credit OTTI on available-for-sale securities	6		5
Non-credit OTTI on held-to-maturity securities
Non-credit portion OTTI loss transfered from net income	0		(1)
Accretion of non-credit portion to HTM asset	15		20
Total non-credit OTTI on held-to-maturity securities	15		19
Net unrealized gain (loss) on hedging activities
Unrealized gains (losses)	88		52
Reclassification of net realized (gains) losses to net income	(3)		(1)
Total net unrealized gain (loss) on hedging activities	85		51
Post retirement plans - reclassification to net income	1		0
Total other comprehensive income	23		44
Total comprehensive income	$ 103		$ 160

[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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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2013

Accounting Policies [Abstract]

Significant Accounting Policies [Text Block]

Summary of Significant Accounting Policies

Our Summary of Significant Accounting Policies can be found in our 2012 Form 10-K starting on page F-11. There have been no significant changes during the first quarter of 2013.

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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
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
MPF Loans Held For Portfolio [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 222		$ 230
Unpaid Principal Balance	217		224
Related Allowance	30		30
Average Recorded Investment	224	202
Interest Income Recognized	$ 0	$ 2

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Capital Stock and Mandatorily Redeemable Capital Stock (MRCS) Regulatory capital actual and requirements (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Equity [Abstract]
Risk Based Capital Required	$ 1,413	$ 1,545
Risk Based Capital Actual	3,323	3,347
Regulatory Capital, Required	2,597	2,783
Regulatory Capital, Actual	3,323	3,347
Regulatory Capital Ratio, Required	4.00%	4.00%
Regulatory Capital Ratio, Actual	5.12%	4.81%
Leverage Capital, Required	3,246	3,479
Leverage Capital, Actual	$ 4,984	$ 5,021
Leverage Ratio, Required	5.00%	5.00%
Leverage Ratio, Actual	7.68%	7.22%

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Investment Securities (Tables)

3 Months Ended

Mar. 31, 2013

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	March 31, 2013		December 31, 2012
U.S. Government & other government related	$	1,868	$	1,106
MBS:
GSE residential	106		120
Government-guaranteed residential	2		3
Total MBS	108		123
Total trading securities	$	1,976	$	1,229

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			Carrying and Fair Value
As of March 31, 2013
U.S. Government & other government related	$	648	$	—		$	58	$	—		$	706
FFELP ABS	6,794		—			509		(13		)	7,290
MBS:
GSE residential	11,265		—			800		(46		)	12,019
Government-guaranteed residential	2,732		—			184		—			2,916
Private-label residential	76		(2		)	—		(1		)	73
Total MBS	14,073		(2		)	984		(47		)	15,008
Total	$	21,515	$	(2	)	$	1,551	$	(60	)	$	23,004
As of December 31, 2012
U.S. Government & other government related	$	690	$	—		$	64	$	—		$	754
FFELP ABS	6,958		—			508		(13		)	7,453
MBS:
GSE residential	11,402		—			880		(54		)	12,228
Government-guaranteed residential	2,758		—			192		—			2,950
Private-label residential	78		(8		)	—		(1		)	69
Total MBS	14,238		(8		)	1,072		(55		)	15,247
Total	$	21,886	$	(8	)	$	1,644	$	(68	)	$	23,454

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 March 31, 2013
U.S. Government & other government related	$	1,739	$	—		$	1,739	$	134	$	—		$	1,873
State or local housing agency	24		—			24		—		—			24
MBS:
GSE residential	3,936		—			3,936		330		—			4,266
Government-guaranteed residential	1,321		—			1,321		56		—			1,377
Private-label residential	1,743		(366		)	1,377		394		(2		)	1,769
Total MBS	7,000		(366		)	6,634		780		(2		)	7,412
Total	$	8,763	$	(366	)	$	8,397	$	914	$	(2	)	$	9,309
As of December 31, 2012
U.S. Government & other government related	$	2,487	$	—		$	2,487	$	139	$	—		$	2,626
State or local housing agency	24		—			24		—		—			24
MBS:
GSE residential	4,282		—			4,282		377		—			4,659
Government-guaranteed residential	1,340		—			1,340		57		—			1,397
Private-label residential	1,815		(381		)	1,434		348		(6		)	1,776
Total MBS	7,437		(381		)	7,056		782		(6		)	7,832
Total	$	9,948	$	(381	)	$	9,567	$	921	$	(6	)	$	10,482

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 March 31, 2013	Amortized Cost		Fair  Value		Carrying Value		Fair  Value
Year of Maturity -
Due in one year or less	$	—	$	—	$	62	$	63
Due after one year through five years	87		92		52		53
Due after five years through ten years	99		107		474		504
Due after ten years	462		507		1,175		1,277
Total non-ABS/MBS	648		706		1,763		1,897
ABS and MBS	20,867		22,298		6,634		7,412
Total securities	$	21,515	$	23,004	$	8,397	$	9,309

Schedule of Projected Annualized Home Price Recovery Rates [Table Text Block]

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

As of March 31, 2013	Recovery Range Annualized %
Months	Low	High
1-6	0.0%	3.0%
7-12	1.0%	4.0%
13-18	2.0%	4.0%
19-30	2.0%	5.0%
31-42	2.0%	6.0%
43-54	2.0%	6.0%
Thereafter	2.3%	5.6%

Total Securities Other-than-Temporarily Impaired during the Life of the Security [Table Text Block]

As of March 31, 2013	Unpaid Principal Balance		Amortized Cost Basis		Carrying Value		Fair Value
Private-label residential MBS:
Alt-A	$	114	$	74	$	72	$	72
Total OTTI AFS securities	$	114	$	74	$	72	$	72
Private-label residential MBS:
Prime	$	1,305	$	1,014	$	755	$	997
Subprime	798		513		406		555
Total OTTI HTM securities	$	2,103	$	1,527	$	1,161	$	1,552

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 March 31, 2013
FFELP ABS	$	—	$	—	$	1,055	$	(13	)		$	1,055	$	(13	)
MBS:
GSE residential	—		—		3,504		(46		)		3,504		(46		)
Private-label residential	—		—		68		(3		)	a	68		(3		)	a
Total MBS	—		—		3,572		(49		)		3,572		(49		)
Total available-for-sale securities	$	—	$	—	$	4,627	$	(62	)		$	4,627	$	(62	)
As of December 31, 2012
FFELP ABS	$	—	$	—	$	1,079	$	(13	)		$	1,079	$	(13	)
MBS:
GSE residential	40		—		3,540		(54		)		3,580		(54		)
Private-label residential	—		—		69		(9		)	a	69		(9		)	a
Total MBS	40		—		3,609		(63		)		3,649		(63		)
Total available-for-sale securities	$	40	$	—	$	4,688	$	(76	)		$	4,728	$	(76	)

^a  Includes $52 million and $45 million of gross unrealized/unrecognized recoveries in fair value at March 31, 2013, and at December 31, 2012.

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 March 31, 2013
Private-label residential MBS Held-to-Maturity	$	—	$	—	$	1,626	$	(368	)	$	1,626	$	(368	)
As of December 31, 2012
Private-label residential MBS Held-to-maturity	$	—	$	—	$	1,640	$	(387	)	$	1,640	$	(387	)

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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	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidated Obligation Bonds [Member]
Level 3 Liabilities [Roll Forward]
Beginning Balance	$ 82	$ (87)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)	6
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Investment Income	0
Included in net change in fair value on OTTI AFS securities in OCI	0	0
Change in fair value included in earnings in derivatives and hedging activities	0	5
Paydowns and settlements	0	0
Ending Balance	76	82
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	5	5
Derivative Assets, Interest Rate Related [Member]
Level 3 Assets [Roll Forward]
Beginning Balance	32	37
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Investment Income	0
Included in net change in fair value on OTTI AFS securities in OCI	0	0
Change in fair value included in earnings in derivatives and hedging activities	(5)	(5)
Paydowns and settlements	0	0
Ending Balance	27	32
Level 3 Liabilities [Roll Forward]
Total unrealized gains (losses) included in earnings attributable to instruments still held at period end	0	(5)
Private-label residential MBS [Member]
Level 3 Assets [Roll Forward]
Beginning Balance	69	63
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Investment Income	1
Included in net change in fair value on OTTI AFS securities in OCI	6	5
Change in fair value included in earnings in derivatives and hedging activities	0	0
Paydowns and settlements	3	(2)
Ending Balance	73	66
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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Background and Basis of Presentation Componenet of other opearting cost and expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Component of Other Operating Cost and Expense [Abstract]
Other Community Investment	$ 50

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Capital Stock and Mandatorily Redeemable Capital Stock (MRCS)

3 Months Ended

Mar. 31, 2013

Capital [Abstract]

Capital Stock and Mandatorily Redeemable Capital Stock (MRCS) [Text Block]

Capital Stock and Mandatorily Redeemable Capital Stock

Capital Rules

Under our Capital Plan 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-54 in our 2012 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.

During the three months ended March 31, 2013, we repurchased excess capital stock totaling $100 million. Our plan for repurchasing the excess capital stock of current members over a period of time (Repurchase Plan) which we implemented in connection with our capital plan, terminated by its terms in May 2012. However, pursuant to a resolution adopted by our Board of Directors as discussed in Note 14 - Regulatory Actions to the financial statements in our 2012 Form 10-K, we continue to repurchase excess capital stock held by members on a quarterly basis if we maintain compliance with the financial and capital thresholds set forth in the Repurchase Plan both prior to and following the repurchase.

On April 15, 2013, following our assessment that we met the thresholds for repurchase based on the financial results for the first quarter of 2013, we notified members of another repurchase opportunity and the process for requesting repurchase. In accordance with that process, we announced our plan to repurchase excess capital stock of up to $200 million on May 15, 2013, which represents approximately all of the excess capital stock outstanding.

Capital Concentration

As of March 31, 2013, BMO Harris Bank N.A. held $210 million, or 14%, of our total capital stock outstanding. No other members had capital stock exceeding 10%.

Minimum Capital Requirements

For details on our minimum capital requirements, see Minimum Capital Requirements after Conversion to New Capital Structure on page F-55 of our 2012 Form 10-K. We complied with our minimum regulatory capital requirements as shown below:

	March 31, 2013						December 31, 2012
	Requirement			Actual			Requirement			Actual
Risk-based capital	$	1,413		$	3,323		$	1,545		$	3,347
Total regulatory capital	$	2,597		$	3,323		$	2,783		$	3,347
Total regulatory capital ratio	4.00		%	5.12		%	4.00		%	4.81		%
Leverage capital	$	3,246		$	4,984		$	3,479		$	5,021
Leverage capital ratio	5.00		%	7.68		%	5.00		%	7.22		%

Total regulatory capital and leverage capital do not include accumulated other comprehensive income (loss). Under the FHFA regulation on capital classifications and critical capital levels for the FHLBs, we are adequately capitalized.

Mandatorily Redeemable Capital Stock

We reclassify capital stock from equity to mandatorily redeemable capital stock (MRCS) in our Statements of Condition and Statements of Cash Flows under conditions as further described in Mandatorily Redeemable Capital Stock on page F-56 in our 2012 Form 10-K.