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Quarterly report pursuant to Section 13 or 15(d)

ASSET RETIREMENT OBLIGATIONS - Asset Retirement Obligation Disclosure (Details)

v3.22.1
ASSET RETIREMENT OBLIGATIONS - Asset Retirement Obligation Disclosure (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Asset Retirement Obligation [Roll Forward] Ìý Ìý
Asset retirement obligation at beginning of period $ 449 $ 342
Decrease from acquisitions 0 (34)
Accretion expense 7 3
Revision in estimated cash flows 7 0
Remediation payments (3) (1)
Asset retirement obligation at end of period $ 460 $ 310