THE ACQUISITION - PRELIMINARY PURCHASE PRICE ALLOCATION (Details) - Anadarko Petroleum Corporation $ in Millions	Aug. 08, 2019 USD ($)
Fair value of assets acquired:
Current assets	$ 3,586
Assets held for sale	10,616
Investments in unconsolidated entities	194
Property, plant and equipment	49,125
Other assets	836
Amount attributable to assets acquired	64,357
Fair value of liabilities assumed:
Current liabilities	3,467
Liabilities of assets held for sale	2,200
Long-term debt	13,240
Deferred income taxes	8,591
Asset retirement obligations	2,724
Pension and post-retirement obligations	1,072
Non-current derivative liabilities	1,280
Other long-term liabilities	2,323
Amount attributable to liabilities assumed	34,897
Net assets	29,460
Fair value of WES net assets acquired less noncontrolling interests	6,244
Total Acquisition consideration	35,704
WES
Fair value of assets acquired:
Current assets	499
Investments in unconsolidated entities	2,425
Property, plant and equipment	10,160
Intangible assets - customer relationships	1,800
Goodwill	5,772
Other assets	342
Amount attributable to assets acquired	20,998
Fair value of liabilities assumed:
Current liabilities	815
Long-term debt	7,407
Deferred income taxes	1,174
Asset retirement obligations	321
Other long-term liabilities	142
Amount attributable to liabilities assumed	9,859
Net assets	11,139
Fair value of noncontrolling interests	4,895
Total Acquisition consideration	$ 6,244