Employee Retirement Plans and Incentive Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2019

Retirement Benefits [Abstract]

Defined Benefit Plan, Plan Assets, Category [Table Text Block]

The table below presents the fair values of the Cash Balance Plan's assets as of December 31, 2019 and 2018, by asset category. See Note 19 – Fair Value for further information regarding the three levels of fair value measurement.

	2019								2018
	Fair Value Measurement Using:								Fair Value Measurement Using:
Asset Category	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	2	$	—	$	—	$	2	$	1	$	—	$	—	$	1
Equity mutual funds	46		—		—		46		33		—		—		33
Fixed income mutual funds	21		—		—		21		19		—		—		19
Real estate mutual funds	3		—		—		3		2		—		—		2
Other mutual funds	2		—		—		2		2		—		—		2
Total	$	74	$	—	$	—	$	74	$	57	$	—	$	—	$	57

Schedule of Net Funded Status [Table Text Block]

The following table presents the fair value of plan assets as well as the funded status that is recognized in other assets/(liabilities) in the Statements of Condition for the defined benefit Cash Balance Plan, non-qualified defined benefit plans, and postretirement health benefit plan at December 31, 2019 and 2018.

	2019								2018
	Cash Balance Plan		Non-Qualified Defined Benefit Plans			Post-retirement Health Benefit Plan			Cash Balance Plan			Non-Qualified Defined Benefit Plans			Post-retirement Health Benefit Plan
Fair value of plan assets	$	74	$	—		$	—		$	57		$	—		$	—
Funded status	6		(20		)	(2		)	(1		)	(19		)	(2		)

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

Amounts recognized in AOCI at December 31, 2019 and 2018, consist of:

	2019							2018
	Cash Balance Plan		Non-Qualified Defined Benefit Plans		Post-retirement Health Benefit Plan			Cash Balance Plan		Non-Qualified Defined Benefit Plans		Post-retirement Health Benefit Plan
Net loss/(gain)	$	14	$	1	$	(1	)	$	17	$	1	$	(1	)

Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block]

The following table presents information for pension plans with assets in excess of benefit obligations and for pension plans with benefit obligations in excess of plan assets at December 31, 2019 and 2018.

	2019						2018
	Cash Balance Plan		Non-Qualified Defined Benefit Plans		Post-retirement Health Benefit Plan		Cash Balance Plan		Non-Qualified Defined Benefit Plans		Post-retirement Health Benefit Plan
Projected benefit obligation	$	68	$	20	$	2	$	58	$	19	$	2
Accumulated benefit obligation	67		20		2		57		19		2
Fair value of plan assets	74		—		—		57		—		—

Defined Benefit Plan, Plan Assets, Allocation [Table Text Block]

The Cash Balance Plan's weighted average asset allocation at December 31, 2019 and 2018, by asset category was as follows:

Asset Category	2019		2018
Cash and cash equivalents	2	%	3	%
Equity mutual funds	63		57
Fixed income mutual funds	28		33
Real estate mutual funds	4		4
Other mutual funds	3		3
Total	100	%	100	%

Schedule of Expected Benefit Payments [Table Text Block]

The following are the estimated future benefit payments, which reflect expected future service, as appropriate:

Year	Cash Balance Plan		Non-Qualified Defined Benefit Plans		Postretirement Health Benefit Plan
2020	$	3	$	3	$	—
2021	4		1		—
2022	4		4		—
2023	4		1		—
2024	25		5		—
2025 – 2029	21		15		1