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PENSION AND POSTRETIREMENT BENEFIT PLANS - Obligations and Asset Fair Values (Details) - Pension Benefits - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Pension plans with accumulated benefit obligation in excess of plan assets
Projected benefit obligation	$ 47	$ 45
Accumulated benefit obligation	43	41
Fair value of plan assets	$ 32	$ 27

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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

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-Publisher FASB
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Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

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