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Note 9. Employee Benefit Plans Changes in Benefit Obligations and Plan Assets Table (Details) - Defined Benefit Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Net Periodic Benefit Cost
Net periodic pension cost	$ 1	$ 1
Interest cost	6	6
Actuarial loss	2	2
Expected return on plan assets	(7)	(7)
Benefit Obligations
Defined Benefit Plan, Benefit Obligation	145	147
Fair value of plan assets	108	104
Underfunded at end of year	$ 37	$ 43

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

+ References

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-Publisher FASB
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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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Amount of cost recognized for passage of time related to defined benefit plan.

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