ACQUISTION AND DIVESTITURE ACTIVITY - PURCHASE PRICE ALLOCATION (Details) - Oncor Holdings [Member] $ in Millions	Mar. 09, 2018 USD ($)
Assets acquired:
Accounts receivable – other, net	$ 1
Due from unconsolidated affiliates	46
Investment in Oncor Holdings	9,161
Deferred income tax assets	353
Other noncurrent assets	109
Total assets acquired	9,670
Liabilities assumed:
Other current liabilities	23
Pension and other postretirement benefit plan obligations	21
Deferred credits and other	60
Total liabilities assumed	104
Net assets acquired	9,566
Total purchase price	$ 9,566