Pension and Postretirement Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2019

Multiemployer Plans, Pension [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Funded Status [Table Text Block]

The following table summarizes the net pension cost and funded status of the Pentegra DB Plan (dollars in millions):

	2019			2018			2017
Net pension cost1	$	2		$	1		$	—
Pentegra DB Plan’s funded status as of July 1	108.59		%	109.86		%	111.30		%
Des Moines Bank DB Plan’s funded status as of July 1	102.81		%	107.53		%	106.65		%
Seattle Bank DB Plan’s funded status as of July 1	103.62		%	106.00		%	109.81		%

1 Represents the net pension cost charged to compensation and benefits expense on the Statements of Income for the years ended December 31, 2019, 2018, and 2017. The amounts recorded for the year ended December 31, 2017 were less than $1 million.