| Amount of accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, before Federal Home Loan Bank (FHLBank) assessments. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners). Includes, but is not limited to, foreign currency translation, certain pension adjustments, unrealized gain (loss) on certain investments in debt and equity securities, other than temporary impairment (OTTI) loss related to factors other than credit loss on available-for-sale and held-to-maturity debt securities, and increase (decrease) in the fair value of derivatives related to the effective portion of a designated cash flow hedge. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |