Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
OPERATING ACTIVITIES
Net Income	$ 92	$ 112
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation and amortization	(6)	16
Net (gains) losses on trading securities	(26)	(10)
Net change in derivatives and hedging activities	(262)	(33)
Other adjustments	6	0
Net change in:
Accrued interest receivable	(7)	(52)
Other assets	10	(2)
Accrued interest payable	5	32
Other liabilities	2	(3)
Total adjustments	(278)	(52)
Net Cash Provided by (Used in) Operating Activities	(186)	60
Net change in:
Interest-bearing deposits	(346)	(29)
Securities purchased under agreements to resell	7,400	(3,300)
Federal funds sold	(4,330)	(3,835)
Trading securities
Proceeds from maturities	57	8
Purchases	(871)	0
Available-for-sale securities
Proceeds from sales and maturities	772	640
Held-to-maturity securities
Proceeds from sales and maturities	113	115
Advances
Principal collected	79,358	67,845
Originated	(78,332)	(60,649)
Mortgage loans held for portfolio
Principal collected	357	216
Originated or purchased	(571)	(327)
Other investing activities, net	(2)	(2)
Net Cash Provided by (Used in) Investing Activities	3,605	682
FINANCING ACTIVITIES
Net change in deposits	155	(142)
Borrowings from other FHLBanks	0	(500)
Net proceeds from issuance of consolidated obligations
Discount notes	32,197	37,073
Bonds	17,706	14,926
Payments for maturing and retiring consolidated obligations
Discount notes	(28,645)	(34,973)
Bonds	(25,217)	(16,844)
Proceeds from issuance of capital stock	2,074	1,551
Proceeds from issuance of mandatorily redeemable capital stock	19	1
Payments for repurchases/redemptions of capital stock	(1,932)	(1,781)
Payments for repurchases/redemptions of mandatorily redeemable capital stock	(135)	(21)
Cash dividends paid	(59)	(70)
Net cash provided by (used in) financing activities	(3,837)	(780)
Net increase (decrease) in cash and due from banks	(418)	(38)
Cash and due from banks at the beginning of the period	1,029	119
Cash and due from banks at the end of the period	611	81
SUPPLEMENTAL DISCLOSURES
Interest paid	569	853
Affordable Housing Program payments	6	7
Noncash Investing and Financing Items [Abstract]
Capitalized interest on reverse mortgage securities	22	32
Traded not settled investments	139	0
Transfers of mortgage loans to real estate owned	0	1
Capital stock reclassified to (from) mandatorily redeemable capital stock, net	6	2
Initial Right-of-Use Asset Recognition	0	3
Initial Lease Liability Recognition	$ 0	$ 3