Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Fair Value Measurement Inputs (Details) - Altus Midstream LP $ in Millions	Sep. 30, 2020 USD ($)	Dec. 31, 2019	Jun. 12, 2019 USD ($)
Derivative [Line Items]
Embedded derivative	$ 179		$ 94
Significant Unobservable Inputs (Level 3) \| Measurement Input, Risk Free Interest Rate \| Minimum
Derivative [Line Items]
Embedded derivative liability, measurement input	0.1454	0.0960
Significant Unobservable Inputs (Level 3) \| Measurement Input, Risk Free Interest Rate \| Maximum
Derivative [Line Items]
Embedded derivative liability, measurement input	0.1618	0.1268
Significant Unobservable Inputs (Level 3) \| Measurement Input, Interest Rate Volatility
Derivative [Line Items]
Embedded derivative liability, measurement input	0.3532	0.2189