DEBT AND FINANCING COSTS - Additional Information (Details) £ in Millions				1 Months Ended		3 Months Ended	12 Months Ended
	Nov. 03, 2020 USD ($)	Aug. 18, 2020 USD ($)	Jun. 21, 2019 USD ($)	Mar. 31, 2019	Nov. 30, 2018 USD ($) contract	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 GBP (£)	Dec. 31, 2020 GBP (£)	Aug. 17, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 19, 2019 USD ($)	Dec. 31, 2018	Mar. 31, 2018 USD ($)
Debt Instrument [Line Items]
Loss (gain) from extinguishment of debt							$ 104,000,000	$ (160,000,000)	$ 75,000,000
Unamortized discount							30,000,000	35,000,000
Commercial paper, average outstanding								0
Debt issuance costs							39,000,000	57,000,000
Discount of debt amortization							6,000,000	7,000,000	$ 2,000,000
Current maturities							$ 215,000,000	2,000,000
Altus Midstream LP
Debt Instrument [Line Items]
Debt leverage ratio (less than)							4.00			4.00
Senior Notes
Debt Instrument [Line Items]
Debt repurchased principle amount		$ 644,000,000	$ 932,000,000					588,000,000				$ 1,250,000,000		$ 1,000,000,000
Extinguishment of debt amount			1,000,000,000
Loss (gain) from extinguishment of debt		(2,000,000)	75,000,000					(158,000,000)
Unamortized debt issuance costs and discount			$ 7,000,000
Discount to par of debt repurchase		38,000,000						168,000,000
Debt repurchase price		644,000,000						428,000,000
Debt instrument, repurchase early tender premium		32,000,000
Debt repurchase, accrued and unpaid interest		$ 6,000,000
Senior Notes | Debt Repurchase, Cash Tender Offers
Debt Instrument [Line Items]
Debt repurchased principle amount						$ 1,700,000,000
Loss (gain) from extinguishment of debt						105,000,000
Unamortized debt issuance costs and discount						11,000,000
Debt repurchase price						$ 1,800,000,000
Senior Notes | Open Market Repurchase
Debt Instrument [Line Items]
Debt repurchased principle amount							$ 22,000,000
Loss (gain) from extinguishment of debt							(1,000,000)
Discount to par of debt repurchase							2,000,000
Debt repurchase price							20,000,000
4.250% Notes Due January 15, 2030 | Senior Notes
Debt Instrument [Line Items]
Debt repurchased principle amount														$ 600,000,000
Debt interest rate														4.25%
5.350% Notes Due July 1, 2049 | Senior Notes
Debt Instrument [Line Items]
Debt repurchased principle amount														$ 400,000,000
Debt interest rate														5.35%
Apache credit facility
Debt Instrument [Line Items]
Line of credit outstanding							$ 542,000,000	150,000,000
Apache credit facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, committed amount																$ 4,000,000,000
Debt extension term				1 year
Quarterly facility fees at per annum rate							0.25%
Maximum potential lien on assets located in specified regions							$ 1,900,000,000
Apache credit facility | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Debt-to-capital ratio															0.60
Percentage of liens of companies consolidated asset							15.00%			15.00%
Apache credit facility | Revolving Credit Facility | Base Rate
Debt Instrument [Line Items]
Margin percentage							0.50%
Apache credit facility | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Margin percentage							1.50%
4.875% Senior Notes Due In 2027 | Senior Notes
Debt Instrument [Line Items]
Debt repurchased principle amount												$ 750,000,000
Debt interest rate												4.875%
4.625% Senior Notes Due In 2025 | Senior Notes
Debt Instrument [Line Items]
Debt repurchased principle amount												$ 500,000,000
Debt interest rate												4.625%
3.625% notes due 2021 | Senior Notes
Debt Instrument [Line Items]
Debt interest rate	3.625%
Current maturities	$ 183,000,000
Redemption price, percentage of principal amount redeemed	100.00%
Line of Credit | Altus Midstream LP
Debt Instrument [Line Items]
Debt covenant leverage ratio							5.00			5.00
Incentive distribution							$ 30,000,000
Adjusted pursuant agreement consecutive equals or exceeds							$ 350,000,000
Line of Credit | Altus Midstream LP | Maximum
Debt Instrument [Line Items]
Debt covenant leverage ratio							5.50			5.50
Line of Credit | Altus Midstream LP | Minimum
Debt Instrument [Line Items]
Debt covenant leverage ratio							4.00			4.00
Line of Credit | Revolving Credit Facility | Altus Midstream LP
Debt Instrument [Line Items]
Letters of credit outstanding, amount							$ 2,000,000	0
Debt extension term					1 year
Line of credit facility maximum borrowing capacity					$ 800,000,000
Line of credit facility, number of extension options | contract					2
Line of credit facility, maximum borrowing capacity, if adding new lenders					$ 1,500,000,000
Line of Credit | Letter of Credit | Altus Midstream LP
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity					100,000,000
Line of Credit | Swingline Loan Subfacility | Altus Midstream LP
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity					$ 100,000,000
Line of Credit | Uncommitted Lines of Credit
Debt Instrument [Line Items]
Line of credit outstanding							0	0
Line of Credit | Uncommitted Lines of Credit | Letter of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount							17,000,000	17,000,000		£ 117	£ 34
Line of Credit | Apache credit facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity													$ 5,000,000,000
Line of Credit | Apache credit facility | Letter of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount							20,000,000	40,000,000		£ 748	£ 633
Line of credit facility, committed amount							2,080,000,000.00
Line of credit facility maximum borrowing capacity							3,000,000,000
Line of Credit | Altus credit facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit outstanding							657,000,000	624,000,000
Line of Credit | Altus credit facility | Revolving Credit Facility | Altus Midstream LP
Debt Instrument [Line Items]
Line of credit outstanding							$ 657,000,000	$ 624,000,000