EMPLOYEE BENEFIT PLANS (Schedule of Estimated Benefits Expected to Be Paid) (Details) $ in Millions	Dec. 31, 2019 USD ($)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
2020	$ 801
2021	874
2022	910
2023	944
2024	975
Thereafter in the succeeding five years	5,238
PBOP Plans
Defined Benefit Plan Disclosure [Line Items]
2020	92
2021	94
2022	92
2023	95
2024	98
Thereafter in the succeeding five years	482
Federal Subsidy
Defined Benefit Plan Disclosure [Line Items]
2020	(8)
2021	(9)
2022	(2)
2023	(2)
2024	(3)
Thereafter in the succeeding five years	$ (8)

Defined Benefit Plan, Expected Future Benefit, Five Fiscal Years Thereafter

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Defined Benefit Plan, Expected Future Receipt, Next Twelve Months

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Defined Benefit Plan, Expected Future Receipt, Year Three

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Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

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