SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Oil and Natural Gas Properties (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) $ / Boe	Dec. 31, 2020 USD ($) $ / Boe	Dec. 31, 2019 USD ($) $ / Boe
Property, Plant and Equipment [Line Items]
Depreciation, depletion and amortization excluding amortization of financing costs	$ 1,275	$ 1,311	$ 1,454
Estimated future net revenue discounted rate per annum	10.00%
Oil and Gas Properties
Property, Plant and Equipment [Line Items]
Average depletion rate per barrel equivalent unit of production | $ / Boe	8.77	11.30	13.54
Depreciation, depletion and amortization excluding amortization of financing costs	$ 1,200	$ 1,200	$ 1,400