Statements of Condition (Parenthetical) - USD ($) shares in Millions, $ in Millions		Dec. 31, 2019	Dec. 31, 2018
HTM securities pledged as collateral that may be repledged		$ 0	$ 0
Available-for-sale securities pledged as collateral that may be repledged		381	0
Trading securities pledged as collateral that may be repledged		0	0
Assets:
Fair Value of Held-to-maturity securities		7,566	11,047
Fair Value of Advances Under the Fair Value Option	[1]	4,370	5,133
Allowance for credit losses on mortgage loans		$ 0	$ 0
Capital:
Common stock, par value		$ 100
Common Class B
Capital:
Common stock, par value		$ 100	$ 100
Common stock, shares issued		30	29
Common stock, shares outstanding		30	29
Consolidated obligation bonds
Liabilities:
Fair Value of Bonds Under the Fair Value Option		$ 337	$ 2,019

[1] At December 31, 2019 and 2018, none of these advances were 90 days or more past due or had been placed on nonaccrual status.