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, 2022 USD ($) MWh MMBbls Bcf	Dec. 31, 2022 GBP (£) MWh MMBbls Bcf	Dec. 31, 2022 EUR (€) MWh MMBbls Bcf	Dec. 31, 2022 JPY (¥) MWh MMBbls Bcf	Dec. 31, 2022 CAD ($) MWh MMBbls Bcf	Dec. 31, 2021 USD ($) MWh MMBbls Bcf	Dec. 31, 2021 GBP (£) MWh MMBbls Bcf	Dec. 31, 2021 EUR (€) MWh MMBbls Bcf	Dec. 31, 2021 JPY (¥) MWh MMBbls Bcf	Dec. 31, 2021 CAD ($) MWh MMBbls Bcf
Foreign exchange contracts - United States dollar or GBP or Japanese yen forwards - purchase
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2023	$ 655			¥ 0
2024	1,000			0
2025	500			84,800
2026	0			0
2027	0			0
Thereafter	0			0
Total notional principal	2,155			¥ 84,800		$ 2,508			¥ 72,500
Foreign exchange contracts - United States dollar or GBP forwards - sell
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2023	8,297	£ 29	€ 92
2024	6,386	30	91
2025	4,613	30	86
2026	4,121	28	85
2027	2,837	32	81
Thereafter	1,356	0	262
Total notional principal	$ 27,610	£ 149	€ 697			$ 25,427	£ 177	€ 801
Interest rate contracts - short-term borrowings
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2023					$ 8,698
2024					538
2025					30
2026					26
2027					25
Thereafter					39
Total notional principal					9,356					$ 597
Interest rate contract - long term debt - Pay Fixed Rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2023					5,496
2024					1,766
2025					589
2026					0
2027					0
Thereafter					0
Total notional principal					7,851					5,279
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2023					37
2024					31
2025					12
2026					0
2027					0
Thereafter					0
Total notional principal					$ 80					$ 67
Commodity contracts | Natural gas
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 notional quantity (in bcf, bbl or mbbl) | Bcf	52	52	52	52	52
2023 notional quantity (in bcf, bbl or mbbl) | Bcf	25	25	25	25	25
2024 notional quantity (in bcf, bbl or mbbl) | Bcf	15	15	15	15	15
2025 notional quantity (in bcf, bbl or mbbl) | Bcf	1	1	1	1	1
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	93	93	93	93	93	199	199	199	199	199
Commodity contracts | Crude
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 notional quantity (in bcf, bbl or mbbl) | MMBbls	16	16	16	16	16
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	16	16	16	16	16	12	12	12	12	12
Commodity contracts | Power | Net sell
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 notional quantity (MW/H) | MWh	26	26	26	26	26
2023 notional quantity (MW/H) | MWh	(25)	(25)	(25)	(25)	(25)
2024 notional quantity (MW/H) | MWh	(44)	(44)	(44)	(44)	(44)
2025 notional quantity (MW/H) | MWh	0	0	0	0	0
2026 notional quantity (MW/H) | MWh	0	0	0	0	0
Thereafter notional quantity (MW/H) | MWh	0	0	0	0	0
Total notional quantity (MW/H) | MWh	(14)	(14)	(14)	(14)	(14)	(43)	(43)	(43)	(43)	(43)