REVENUE RECOGNITION - Disaggregation of Revenue by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 1,417	$ 2,118
E&P
Disaggregation of Revenue [Line Items]
Total operating revenues	838	1,439
Marketing
Disaggregation of Revenue [Line Items]
Total operating revenues	579	679
Operating Segments | E&P
Disaggregation of Revenue [Line Items]
Total operating revenues	824	1,429
Operating Segments | Marketing
Disaggregation of Revenue [Line Items]
Total operating revenues	1,377	2,041
Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	(784)	(1,352)
Intersegment Revenues | E&P
Disaggregation of Revenue [Line Items]
Total operating revenues	14	10
Intersegment Revenues | Marketing
Disaggregation of Revenue [Line Items]
Total operating revenues	(798)	(1,362)
Gas sales
Disaggregation of Revenue [Line Items]
Total operating revenues	584	1,145
Gas sales | Operating Segments | E&P
Disaggregation of Revenue [Line Items]
Total operating revenues	571	1,136
Gas sales | Operating Segments | Marketing
Disaggregation of Revenue [Line Items]
Total operating revenues	0	0
Gas sales | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	13	9
Oil sales
Disaggregation of Revenue [Line Items]
Total operating revenues	82	95
Oil sales | Operating Segments | E&P
Disaggregation of Revenue [Line Items]
Total operating revenues	81	94
Oil sales | Operating Segments | Marketing
Disaggregation of Revenue [Line Items]
Total operating revenues	0	0
Oil sales | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	1	1
NGL sales
Disaggregation of Revenue [Line Items]
Total operating revenues	174	201
NGL sales | Operating Segments | E&P
Disaggregation of Revenue [Line Items]
Total operating revenues	174	201
NGL sales | Operating Segments | Marketing
Disaggregation of Revenue [Line Items]
Total operating revenues	0	0
NGL sales | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	0	0
Marketing
Disaggregation of Revenue [Line Items]
Total operating revenues	579	679
Marketing | Operating Segments | E&P
Disaggregation of Revenue [Line Items]
Total operating revenues	0	0
Marketing | Operating Segments | Marketing
Disaggregation of Revenue [Line Items]
Total operating revenues	1,377	2,041
Marketing | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	(798)	(1,362)
Other
Disaggregation of Revenue [Line Items]
Total operating revenues	(2)	(2)
Other | Operating Segments | E&P
Disaggregation of Revenue [Line Items]
Total operating revenues	(2)	(2)
Other | Operating Segments | Marketing
Disaggregation of Revenue [Line Items]
Total operating revenues	0	0
Other | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 0	$ 0