FAIR VALUE MEASUREMENT (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	$ 0	$ 0
Other current assets	492	523
Other assets	1,601	1,460
Derivative Liability, Fair Value, Gross Liability	42	28
Derivatives:
Derivative Asset	170	73
Derivatives: [Abstract]
Derivative Liability	42	24
NAV
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	25	29
Assets [Abstract]
Trust Assets Fair Value Disclosure	56	64
Derivatives:
Derivative Asset	0	0
Contingent receivable	0	0
Derivatives: [Abstract]
Derivative Liability	0	0
Long-term debt, including current portion	0	0
Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	7	50
Assets [Abstract]
Trust Assets Fair Value Disclosure	3	8
Derivatives:
Derivative Asset	4	10
Contingent receivable	0	0
Derivatives: [Abstract]
Derivative Liability	0	1
Long-term debt, including current portion	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Assets [Abstract]
Trust Assets Fair Value Disclosure	122	137
Derivatives:
Derivative Asset	166	67
Contingent receivable	0	0
Derivatives: [Abstract]
Derivative Liability	42	27
Long-term debt, including current portion	10,097	10,630
Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Derivatives:
Derivative Asset	0	0
Contingent receivable	57	81
Derivatives: [Abstract]
Derivative Liability	0	0
Long-term debt, including current portion	0	0
Carrying Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	32	79
Assets [Abstract]
Trust Assets Fair Value Disclosure	181	209
Derivatives:
Derivative Asset	170	77
Contingent receivable	67	90
Derivatives: [Abstract]
Derivative Liability	42	28
Long-term debt, including current portion	10,620	9,450
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	32	79
Assets [Abstract]
Trust Assets Fair Value Disclosure	181	209
Derivatives:
Derivative Asset	170	77
Contingent receivable	57	81
Derivatives: [Abstract]
Derivative Liability	42	28
Long-term debt, including current portion	10,097	10,630
Embedded Derivative Financial Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative Liability, Fair Value, Gross Liability	39	27
Derivatives:
Derivative Asset	166	61
Derivatives: [Abstract]
Derivative Liability	39	24
Embedded Derivative Financial Instruments [Member] | NAV
Derivatives:
Derivative Asset	0	0
Derivatives: [Abstract]
Derivative Liability	0	0
Embedded Derivative Financial Instruments [Member] | Level 1
Derivatives:
Derivative Asset	0	0
Derivatives: [Abstract]
Derivative Liability	0	0
Embedded Derivative Financial Instruments [Member] | Level 2
Derivatives:
Derivative Asset	166	64
Derivatives: [Abstract]
Derivative Liability	39	27
Embedded Derivative Financial Instruments [Member] | Level 3
Derivatives:
Derivative Asset	0	0
Derivatives: [Abstract]
Derivative Liability	0	0
Embedded Derivative Financial Instruments [Member] | Carrying Amount, Fair Value Disclosure [Member]
Derivatives:
Derivative Asset	166	64
Derivatives: [Abstract]
Derivative Liability	39	27
Embedded Derivative Financial Instruments [Member] | Estimate of Fair Value Measurement [Member]
Derivatives:
Derivative Asset	166	64
Derivatives: [Abstract]
Derivative Liability	39	27
Future [Member] | NAV
Derivatives:
Derivative Asset	0	0
Future [Member] | Level 1
Derivatives:
Derivative Asset	3	9
Future [Member] | Level 2
Derivatives:
Derivative Asset	0	3
Future [Member] | Level 3
Derivatives:
Derivative Asset	0	0
Future [Member] | Carrying Amount, Fair Value Disclosure [Member]
Derivatives:
Derivative Asset	3	12
Future [Member] | Estimate of Fair Value Measurement [Member]
Derivatives:
Derivative Asset	3	12
Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative Liability, Fair Value, Gross Liability	3	1
Derivatives:
Derivative Asset	4	12
Derivatives: [Abstract]
Derivative Liability	3	0
Commodity Contract [Member] | NAV
Derivatives:
Derivative Asset	0	0
Commodity Contract [Member] | NAV | Futures and Swaps
Derivatives: [Abstract]
Derivative Liability	0
Commodity Contract [Member] | NAV | Forward Contracts
Derivatives: [Abstract]
Derivative Liability		0
Commodity Contract [Member] | Level 1
Derivatives:
Derivative Asset	1	1
Commodity Contract [Member] | Level 1 | Futures and Swaps
Derivatives: [Abstract]
Derivative Liability	0
Commodity Contract [Member] | Level 1 | Forward Contracts
Derivatives: [Abstract]
Derivative Liability		1
Commodity Contract [Member] | Level 2
Derivatives:
Derivative Asset	0	0
Commodity Contract [Member] | Level 2 | Futures and Swaps
Derivatives: [Abstract]
Derivative Liability	3
Commodity Contract [Member] | Level 2 | Forward Contracts
Derivatives: [Abstract]
Derivative Liability		0
Commodity Contract [Member] | Level 3
Derivatives:
Derivative Asset	0	0
Commodity Contract [Member] | Level 3 | Futures and Swaps
Derivatives: [Abstract]
Derivative Liability	0
Commodity Contract [Member] | Level 3 | Forward Contracts
Derivatives: [Abstract]
Derivative Liability		0
Commodity Contract [Member] | Carrying Amount, Fair Value Disclosure [Member]
Derivatives:
Derivative Asset	1	1
Commodity Contract [Member] | Carrying Amount, Fair Value Disclosure [Member] | Futures and Swaps
Derivatives: [Abstract]
Derivative Liability	3
Commodity Contract [Member] | Carrying Amount, Fair Value Disclosure [Member] | Forward Contracts
Derivatives: [Abstract]
Derivative Liability		1
Commodity Contract [Member] | Estimate of Fair Value Measurement [Member]
Derivatives:
Derivative Asset	1	1
Commodity Contract [Member] | Estimate of Fair Value Measurement [Member] | Futures and Swaps
Derivatives: [Abstract]
Derivative Liability	3
Commodity Contract [Member] | Estimate of Fair Value Measurement [Member] | Forward Contracts
Derivatives: [Abstract]
Derivative Liability		1
U.S. core fixed income fund [Member] | NAV
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	25	29
Assets [Abstract]
Trust Assets Fair Value Disclosure	56	64
U.S. core fixed income fund [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	0	0
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
U.S. core fixed income fund [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	0	0
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
U.S. core fixed income fund [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	0	0
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
U.S. core fixed income fund [Member] | Carrying Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	25	29
Assets [Abstract]
Trust Assets Fair Value Disclosure	56	64
U.S. core fixed income fund [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	25	29
Assets [Abstract]
Trust Assets Fair Value Disclosure	56	64
Money market funds [Member] | NAV
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Money market funds [Member] | Level 1
Assets [Abstract]
Trust Assets Fair Value Disclosure	3	8
Money market funds [Member] | Level 2
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Money market funds [Member] | Level 3
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Money market funds [Member] | Carrying Amount, Fair Value Disclosure [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	3	8
Money market funds [Member] | Estimate of Fair Value Measurement [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	3	8
Equity securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	7	50
Equity securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	0	0
Equity securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	0	0
Equity securities | Carrying Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	7	50
Equity securities | Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Marketable Securities	7	50
Government bonds | NAV
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Government bonds | Level 1
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Government bonds | Level 2
Assets [Abstract]
Trust Assets Fair Value Disclosure	34	53
Government bonds | Level 3
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Government bonds | Carrying Amount, Fair Value Disclosure [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	34	53
Government bonds | Estimate of Fair Value Measurement [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	34	53
Government mortgage-backed securities [Member] | NAV
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Government mortgage-backed securities [Member] | Level 1
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Government mortgage-backed securities [Member] | Level 2
Assets [Abstract]
Trust Assets Fair Value Disclosure	37	20
Government mortgage-backed securities [Member] | Level 3
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Government mortgage-backed securities [Member] | Carrying Amount, Fair Value Disclosure [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	37	20
Government mortgage-backed securities [Member] | Estimate of Fair Value Measurement [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	37	20
Corporate bonds [Member] | NAV
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Corporate bonds [Member] | Level 1
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Corporate bonds [Member] | Level 2
Assets [Abstract]
Trust Assets Fair Value Disclosure	31	45
Corporate bonds [Member] | Level 3
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Corporate bonds [Member] | Carrying Amount, Fair Value Disclosure [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	31	45
Corporate bonds [Member] | Estimate of Fair Value Measurement [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	31	45
Asset-backed securities [Member] | NAV
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Asset-backed securities [Member] | Level 1
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Asset-backed securities [Member] | Level 2
Assets [Abstract]
Trust Assets Fair Value Disclosure	17	18
Asset-backed securities [Member] | Level 3
Assets [Abstract]
Trust Assets Fair Value Disclosure	0	0
Asset-backed securities [Member] | Carrying Amount, Fair Value Disclosure [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	17	18
Asset-backed securities [Member] | Estimate of Fair Value Measurement [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	17	18
Collateralized Mortgage Backed Securities [Member] | NAV
Assets [Abstract]
Trust Assets Fair Value Disclosure	0
Collateralized Mortgage Backed Securities [Member] | Level 1
Assets [Abstract]
Trust Assets Fair Value Disclosure	0
Collateralized Mortgage Backed Securities [Member] | Level 2
Assets [Abstract]
Trust Assets Fair Value Disclosure	3
Collateralized Mortgage Backed Securities [Member] | Level 3
Assets [Abstract]
Trust Assets Fair Value Disclosure	0
Collateralized Mortgage Backed Securities [Member] | Carrying Amount, Fair Value Disclosure [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	3
Collateralized Mortgage Backed Securities [Member] | Estimate of Fair Value Measurement [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure	3
Municipal bonds [Member] | NAV
Assets [Abstract]
Trust Assets Fair Value Disclosure		0
Municipal bonds [Member] | Level 1
Assets [Abstract]
Trust Assets Fair Value Disclosure		0
Municipal bonds [Member] | Level 2
Assets [Abstract]
Trust Assets Fair Value Disclosure		1
Municipal bonds [Member] | Level 3
Assets [Abstract]
Trust Assets Fair Value Disclosure		0
Municipal bonds [Member] | Carrying Amount, Fair Value Disclosure [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure		1
Municipal bonds [Member] | Estimate of Fair Value Measurement [Member]
Assets [Abstract]
Trust Assets Fair Value Disclosure		1
Bank Time Deposits | Carrying Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Other current assets	118	114
Other assets	133	132
Derivatives Not Designated as Hedging Instruments | Embedded Derivative Financial Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative Liability, Fair Value, Gross Liability	39	27
Freeport-McMoRan Oil & Gas | Deepwater Gulf of Mexico Interests
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Other current assets	20
Other assets	$ 47	$ 70
Derivatives:
Contingent receivable			$ 150