Transactions with Stockholders (Tables)

6 Months Ended

Jun. 30, 2017

Schedule of Other Transactions [Line Items]

Schedule of Transactions with Members and Former Members [Table Text Block]

Stockholders Holding Five Percent or more of Regulatory Capital Stock (dollars in millions)

	Regulatory Capital Stock				Advance		MPP Unpaid
June 30, 2017	Balance		% of Total		Principal		Principal Balance
JPMorgan Chase Bank, N.A.	$	1,139	27	%	$	26,850	$	—
U.S. Bank, N.A.	548		13		9,783		25
The Huntington National Bank	282		7		2,957		420
Fifth Third Bank	248		6		4,367		2

	Regulatory Capital Stock				Advance		MPP Unpaid
December 31, 2016	Balance		% of Total		Principal		Principal Balance
JPMorgan Chase Bank, N.A.	$	1,317	31	%	$	32,300	$	—
U.S. Bank, N.A.	475		11		8,563		27
Fifth Third Bank	248		6		2,517		2
The Huntington National Bank	244		6		2,433		388

Director [Member]

Schedule of Other Transactions [Line Items]

Schedule of Other Transactions by Balance Sheet Grouping [Table Text Block]

Transactions with Directors' Financial Institutions (dollars in millions)

	June 30, 2017				December 31, 2016
	Balance		% of Total(1)		Balance		% of Total (1)
Advances	$	3,335	4.7	%	$	3,947	5.6	%
MPP	112		1.2		234		2.6
Regulatory capital stock	182		4.3		166		4.0

(1) Percentage of total principal (Advances), unpaid principal balance (MPP), and regulatory capital stock.