Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0001331465 (http://www.sec.gov/CIK)

Fair Value Disclosures [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	Estimated Fair Value Measurements on a Recurring Basis. The following tables present, for each fair value hierarchy level, the Bank’s financial assets and liabilities that are measured at fair value on a recurring basis on its Statements of Condition.   As of December 31, 2016   Fair Value Measurements Using   Netting Adjustment (1)       Level 1           Level 2           Level 3           Total Assets                   Trading securities:                     Government-sponsored enterprises debt obligations $ —   $ 261   $ —   $ —   $ 261   State or local housing agency debt obligations —   1   —   —   1 Total trading securities —   262   —   —   262 Available-for-sale securities:                     Private-label residential MBS —   —   1,345   —   1,345 Derivative assets:                     Interest-rate related —   282   —   73   355 Grantor trust (included in Other assets) 37   —   —   —   37 Total assets at fair value $ 37   $ 544   $ 1,345   $ 73   $ 1,999 Liabilities                   Derivative liabilities:                   Interest-rate related $ —   $ 1,073   $ —   $ (966 )   $ 107 Total liabilities at fair value $ —   $ 1,073   $ —   $ (966 )   $ 107 ____________  (1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held or placed with the same clearing agents and/or counterparties.   As of December 31, 2015   Fair Value Measurements Using   Netting Adjustment (1)           Level 1           Level 2           Level 3           Total Assets                   Trading securities:                     Government-sponsored enterprises debt obligations $ —   $ 1,212   $ —   $ —   $ 1,212   Another FHLBank’s bond —   52   —   —   52   State or local housing agency debt obligations —   1   —   —   1 Total trading securities —   1,265   —   —   1,265 Available-for-sale securities:                     Private-label residential MBS —   —   1,662   —   1,662 Derivative assets:                     Interest-rate related —   337   —   (161 )   176 Grantor trust (included in Other assets) 31   —   —   —   31 Total assets at fair value $ 31   $ 1,602   $ 1,662   $ (161 )   $ 3,134 Liabilities                   Derivative liabilities:                   Interest-rate related $ —   $ 1,551   $ —   $ (1,427 )   $ 124 Total liabilities at fair value $ —   $ 1,551   $ —   $ (1,427 )   $ 124 ____________  (1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held or placed with the same clearing agents and/or counterparties.
Reconciliation of Available-For-Sale Securities Measured at Fair Value	The following table presents a reconciliation of available-for-sale securities that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3).     For the Years Ended December 31,   2016   2015   2014 Balance, beginning of year $ 1,662   $ 1,981   $ 2,299 Total (losses) gains realized and unrealized: (1)             Included in net impairment losses recognized in earnings (3 )   (5 )   (3 )  Included in other comprehensive income 29   (23 )   (7 )      Accretion of credit losses in net interest income 53   42   34 Settlements (396 )   (333 )   (342 ) Balance, end of year $ 1,345   $ 1,662   $ 1,981 ____________  (1)  Related to available-for-sale securities held at year end.
Fair Value Measurements, Nonrecurring [Table Text Block]	The following table presents the fair value hierarchy and carrying value of all assets as of the last impairment date that were still held as of December 31, 2015, for which a nonrecurring fair value adjustment was recorded during the period presented. The carrying value for each of the assets presented in the following table was less than $1 as of December 31, 2016.   As of December 31, 2015   Fair Value Measurements Using       Level 1           Level 2           Level 3         Total Mortgage loans held for portfolio $ —   $ —   $ 1   $ 1 Real estate owned (included in Other assets) —   —   3   3 Total nonrecurring assets at fair value $ —   $ —   $ 4   $ 4
Carrying Values and Estimated Fair Values	The following tables present the carrying values and estimated fair values of the Bank’s financial instruments.     As of December 31, 2016       Estimated Fair Value   Carrying Value   Total           Level 1           Level 2           Level 3           Netting Adjustment (1) Assets:                        Cash and due from banks $ 1,815   $ 1,815   $ 1,815   $ —   $ —   $ —  Interest bearing-deposits 1,106   1,106   —   1,106   —   —  Securities purchased under agreements to resell 1,386   1,386   —   1,386   —   —  Federal funds sold 7,770   7,770   —   7,770   —   —  Trading securities 262   262   —   262   —   —  Available-for-sale securities 1,345   1,345   —   —   1,345   —  Held-to-maturity securities 24,641   24,633   —   23,843   790   —  Advances 99,077   99,062   —   99,062   —   —  Mortgage loans held for portfolio, net 523   569   —   569   —   —  Accrued interest receivable 171   171   —   171   —   —  Derivative assets 355   355   —   282   —   73     Grantor trust assets (included in Other assets) 37   37   37   —   —   — Liabilities:                        Interest-bearing deposits 1,118   1,118   —   1,118   —   —  Consolidated obligations, net:                       Discount notes 41,292   41,293   —   41,293   —   — Bonds 88,647   88,768   —   88,768   —   —  Mandatorily redeemable capital stock 1   1   1   —   —   —  Accrued interest payable 128   128   —   128   —   —  Derivative liabilities 107   107   —   1,073   —   (966 ) ____________  (1)  Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held or placed with the same clearing agents and/or counterparties.   As of December 31, 2015       Estimated Fair Value   Carrying Value   Total           Level 1           Level 2           Level 3           Netting Adjustment (1) Assets:                        Cash and due from banks $ 1,751   $ 1,751   $ 1,751   $ —   $ —   $ —  Interest bearing-deposits 1,088   1,088   —   1,088   —   —  Securities purchased under agreements to resell 2,500   2,500   —   2,500   —   —  Federal funds sold 5,421   5,421   —   5,421   —   —  Trading securities 1,265   1,265   —   1,265   —   —  Available-for-sale securities 1,662   1,662   —   —   1,662   —  Held-to-maturity securities 23,239   23,263   —   22,179   1,084   —  Advances 104,168   104,021   —   104,021   —   —  Mortgage loans held for portfolio, net 584   647   —   646   1   —  Accrued interest receivable 171   171   —   171   —   —  Derivative assets 176   176   —   337   —   (161 )     Grantor trust assets (included in Other assets) 31   31   31   —   —   — Liabilities:                        Interest-bearing deposits 1,084   1,084   —   1,084   —   —  Consolidated obligations, net:                       Discount notes 69,434   69,432   —   69,432   —   — Bonds  63,953   63,940   —   63,940   —   —  Mandatorily redeemable capital stock 14   14   14   —   —   —  Accrued interest payable 127   127   —   127   —   —  Derivative liabilities 124   124   —   1,551   —   (1,427 ) ____________  (1)  Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held or placed with the same clearing agents and/or counterparties.