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ASSET RETIREMENT OBLIGATIONS - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Changes to the asset retirement obligations
Beginning Balance	$ 159	$ 856
Liabilities settled	(1)	(744)
Changes in timing and amount of estimated cash flows	8
Accretion	13	47
Ending Balance	$ 179	159
TMI-2
Changes to the asset retirement obligations
Decrease in asset retirement obligation		$ 726

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- Definition

Asset Retirement Obligation Period Increase Decrease.

+ References

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The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

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-Section 50
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- Definition

Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

+ References

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Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.

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Amount of increase (decrease) in asset retirement obligations.

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Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

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