Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of principal amount of debt redeemed.

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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, including portion classified as current.

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DEBT AND FINANCING COSTS - Schedule of Debt (Details) - USD ($) $ in Millions	Jan. 18, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt, gross		$ 6,344	$ 8,052
Finance lease obligations		36	38
Unamortized discount		(30)	(35)
Debt issuance costs		(39)	(57)
Total debt		7,510	8,772
Current maturities		(215)	(2)
LONG-TERM DEBT (Note 9) ($657 and $624 related to Altus VIE)		7,295	8,770
Apache credit facility
Debt Instrument [Line Items]
Credit facility		542	150
Notes and debentures
Debt Instrument [Line Items]
Debt fair value		$ 7,100	8,500
Unsecured Debt \| 3.25% notes due 2022
Debt Instrument [Line Items]
Debt interest rate		3.25%
Long-term debt, gross		$ 213	213
Unsecured Debt \| 3.25% notes due 2022 \| Subsequent Event
Debt Instrument [Line Items]
Redemption price, percentage of principal amount redeemed	100.00%
Unsecured Debt \| 2.625% notes due 2023
Debt Instrument [Line Items]
Debt interest rate		2.625%
Long-term debt, gross		$ 123	123
Unsecured Debt \| 4.625% notes due 2025
Debt Instrument [Line Items]
Debt interest rate		4.625%
Long-term debt, gross		$ 500	500
Unsecured Debt \| 7.7% notes due 2026
Debt Instrument [Line Items]
Debt interest rate		7.70%
Long-term debt, gross		$ 79	79
Unsecured Debt \| 7.95% notes due 2026
Debt Instrument [Line Items]
Debt interest rate		7.95%
Long-term debt, gross		$ 133	133
Unsecured Debt \| 4.875% notes due 2027
Debt Instrument [Line Items]
Debt interest rate		4.875%
Long-term debt, gross		$ 378	750
Unsecured Debt \| 4.375% notes due 2028
Debt Instrument [Line Items]
Debt interest rate		4.375%
Long-term debt, gross		$ 703	993
Unsecured Debt \| 7.75% notes due in 2029
Debt Instrument [Line Items]
Debt interest rate		7.75%
Long-term debt, gross		$ 235	235
Unsecured Debt \| 4.25% notes due 2030
Debt Instrument [Line Items]
Debt interest rate		4.25%
Long-term debt, gross		$ 580	580
Unsecured Debt \| 6.0% notes due 2037
Debt Instrument [Line Items]
Debt interest rate		6.00%
Long-term debt, gross		$ 443	443
Unsecured Debt \| 5.1% notes due 2040
Debt Instrument [Line Items]
Debt interest rate		5.10%
Long-term debt, gross		$ 1,333	1,333
Unsecured Debt \| 5.25% notes due 2042
Debt Instrument [Line Items]
Debt interest rate		5.25%
Long-term debt, gross		$ 399	399
Unsecured Debt \| 4.75% notes due 2043
Debt Instrument [Line Items]
Debt interest rate		4.75%
Long-term debt, gross		$ 428	1,133
Unsecured Debt \| 4.25% notes due 2044
Debt Instrument [Line Items]
Debt interest rate		4.25%
Long-term debt, gross		$ 221	559
Unsecured Debt \| 7.375% debentures due 2047
Debt Instrument [Line Items]
Debt interest rate		7.375%
Long-term debt, gross		$ 150	150
Unsecured Debt \| 5.35% notes due 2049
Debt Instrument [Line Items]
Debt interest rate		5.35%
Long-term debt, gross		$ 387	390
Unsecured Debt \| 7.625% debentures due 2096
Debt Instrument [Line Items]
Debt interest rate		7.625%
Long-term debt, gross		$ 39	39
Commercial paper
Debt Instrument [Line Items]
Long-term debt, gross		0	0
Line of Credit \| Altus credit facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility		$ 657	$ 624
Senior Notes \| 3.25% notes due 2022 \| Subsequent Event
Debt Instrument [Line Items]
Debt interest rate	3.25%