RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Notional Principal or Quantity Information (Details) € in Millions, ¥ in Millions, £ in Millions, MWh in Millions, MMBbls in Millions, Bcf in Millions, $ in Millions, $ in Millions	Dec. 31, 2023 USD ($) MWh MMBbls Bcf	Dec. 31, 2023 GBP (£) MWh MMBbls Bcf	Dec. 31, 2023 EUR (€) MWh MMBbls Bcf	Dec. 31, 2023 JPY (¥) MWh MMBbls Bcf	Dec. 31, 2023 CAD ($) MWh MMBbls Bcf	Dec. 31, 2022 USD ($) MWh Bcf MMBbls	Dec. 31, 2022 GBP (£) MWh Bcf MMBbls	Dec. 31, 2022 EUR (€) MWh Bcf MMBbls	Dec. 31, 2022 JPY (¥) MWh Bcf MMBbls	Dec. 31, 2022 CAD ($) MWh Bcf MMBbls
Foreign exchange contracts - United States dollar or GBP or Japanese yen forwards - purchase
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2024	$ 1,360			¥ 0
2025	500			84,800
2026				0
2027	0			0
2028	0			0
Thereafter	0			0
Total notional principal	1,860			¥ 84,800		$ 2,155			¥ 84,800
Foreign exchange contracts - United States dollar or GBP forwards - sell
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2024	6,582	£ 30	€ 141
2025	5,327	30	126
2026	4,697	28	121
2027	4,091	32	81
2028	3,162	0	67
Thereafter	888	0	195
Total notional principal	$ 24,747	£ 120	€ 731			$ 27,610	£ 149	€ 697
Interest rate contracts - short-term borrowings
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2024					$ 5,903
2025					1,881
2026					1,122
2027					74
2028					25
Thereafter					13
Total notional principal					9,018					$ 9,356
Interest rate contract for short term debt receive fixed rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2024					918
2025					923
2026					174
2027					0
2028					0
Thereafter					0
Total notional principal					2,015					0
Interest rate contract - long term debt - Pay Fixed Rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2024					4,582
2025					580
2026					0
2027					0
2028					0
Thereafter					0
Total notional principal					5,162					7,851
Interest rate contract for costless collar
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2024					0
2025					1,098
2026					41
2027					0
2028					0
Thereafter					0
Total notional principal					1,139					0
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2024					34
2025					13
2026					0
2027					0
2028					0
Thereafter					0
Total notional principal					$ 47					$ 80
Commodity contracts | Natural gas
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 notional quantity (in bcf, bbl or mbbl) | Bcf	31	31	31	31	31
2023 notional quantity (in bcf, bbl or mbbl) | Bcf	32	32	32	32	32
2024 notional quantity (in bcf, bbl or mbbl) | Bcf	13	13	13	13	13
2025 notional quantity (in bcf, bbl or mbbl) | Bcf	10	10	10	10	10
2026 notional quantity (in bcf, bbl or mbbl) | Bcf	0	0	0	0	0
Thereafter notional quantity (in bcf, bbl or mbbl) | Bcf	0	0	0	0	0
Total notional quantity (in bcf, bbl or mbbl) | Bcf	86	86	86	86	86	93	93	93	93	93
Commodity contracts | Crude
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 notional quantity (in bcf, bbl or mbbl) | MMBbls	6	6	6	6	6
2023 notional quantity (in bcf, bbl or mbbl) | MMBbls	0	0	0	0	0
2024 notional quantity (in bcf, bbl or mbbl) | MMBbls	0	0	0	0	0
2025 notional quantity (in bcf, bbl or mbbl) | MMBbls	0	0	0	0	0
2026 notional quantity (in bcf, bbl or mbbl) | MMBbls	0	0	0	0	0
Thereafter notional quantity (in bcf, bbl or mbbl) | MMBbls	0	0	0	0	0
Total notional quantity (in bcf, bbl or mbbl) | MMBbls	6	6	6	6	6	16	16	16	16	16
Commodity contracts | Power | Net sell
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 notional quantity (MW/H) | MWh	49	49	49	49	49
2023 notional quantity (MW/H) | MWh	(14)	(14)	(14)	(14)	(14)
2024 notional quantity (MW/H) | MWh	(26)	(26)	(26)	(26)	(26)
2025 notional quantity (MW/H) | MWh	(53)	(53)	(53)	(53)	(53)
2026 notional quantity (MW/H) | MWh	(57)	(57)	(57)	(57)	(57)
Thereafter notional quantity (MW/H) | MWh	(30)	(30)	(30)	(30)	(30)
Total notional quantity (MW/H) | MWh	(22)	(22)	(22)	(22)	(22)	(14)	(14)	(14)	(14)	(14)