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EMPLOYEE RETIREMENT PLANS - Defined-benefit Pension Plans with an Accumulated Benefit Obligation in Excess of Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Qualified
Information for the defined-benefit pension plans with an accumulated benefit obligation in excess of plan assets
Projected benefit obligation	$ 1,100	$ 1,019
Accumulated benefit obligation	1,100	1,019
Fair value of plan assets	844	763
Non-Qualified
Information for the defined-benefit pension plans with an accumulated benefit obligation in excess of plan assets
Projected benefit obligation	162	161
Accumulated benefit obligation	162	161
Fair value of plan assets	$ 0	$ 0

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

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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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