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, 2024 USD ($) MWh Bcf MMBbls	Dec. 31, 2024 GBP (£) MWh Bcf MMBbls	Dec. 31, 2024 EUR (€) MWh Bcf MMBbls	Dec. 31, 2024 JPY (¥) MWh Bcf MMBbls	Dec. 31, 2024 CAD ($) MWh Bcf MMBbls	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
Foreign exchange contracts - United States dollar or GBP or Japanese yen forwards - purchase
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025	$ 1,245			¥ 84,800
2026	0			0
2027	0			0
2028	0			0
2029	0			0
Thereafter	0			0
Total notional principal	1,245			¥ 84,800		$ 1,860			¥ 84,800
Foreign exchange contracts - United States dollar or GBP forwards - sell
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025	6,406	£ 30	€ 126
2026	5,627	28	121
2027	4,811	32	81
2028	3,522	0	67
2029	1,248	0	66
Thereafter	0	0	129
Total notional principal	$ 21,614	£ 90	€ 590			$ 24,747	£ 120	€ 731
Interest rate contracts - short-term borrowings
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025					$ 2,296
2026					1,737
2027					676
2028					49
2029					13
Thereafter					0
Total notional principal					4,771					$ 9,018
Interest rate contract for short term debt receive fixed rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025					0
2026					0
2027					0
2028					0
2029					0
Thereafter					0
Total notional principal					0					2,015
Interest rate contract - long term debt - Pay Fixed Rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025					4,531
2026					753
2027					0
2028					0
2029					0
Thereafter					0
Total notional principal					5,284					5,162
Interest rate contract for costless collar
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025					1,938
2026					268
2027					104
2028					6
2029					0
Thereafter					0
Total notional principal					2,316					1,139
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025					0
2026					0
2027					0
2028					0
2029					0
Thereafter					0
Total notional principal					$ 0					$ 47
Commodity contracts | Natural gas
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025 notional quantity (bcf / mmbbls) | Bcf	154	154	154	154	154
2026 notional quantity (bcf / mmbbls) | Bcf	79	79	79	79	79
2027 notional quantity (bcf / mmbbls) | Bcf	37	37	37	37	37
2028 notional quantity (bcf / mmbbls) | Bcf	11	11	11	11	11
2029 notional quantity (bcf / mmbbls) | Bcf	5	5	5	5	5
Thereafter notional quantity (bcf / mmbbls) | Bcf	2	2	2	2	2
Total notional quantity (bcf / mmbbls) | Bcf	288	288	288	288	288	86	86	86	86	86
Commodity contracts | Crude
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025 notional quantity (bcf / mmbbls) | MMBbls	6	6	6	6	6
2026 notional quantity (bcf / mmbbls) | MMBbls	15	15	15	15	15
2027 notional quantity (bcf / mmbbls) | MMBbls	1	1	1	1	1
2028 notional quantity (bcf / mmbbls) | MMBbls	1	1	1	1	1
2029 notional quantity (bcf / mmbbls) | MMBbls	1	1	1	1	1
Thereafter notional quantity (bcf / mmbbls) | MMBbls	1	1	1	1	1
Total notional quantity (bcf / mmbbls) | MMBbls	25	25	25	25	25	6	6	6	6	6
Commodity contracts | Power | Net purchase
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025 notional quantity (MWH) | MWh	61	61	61	61	61
2026 notional quantity (MWH) | MWh	24	24	24	24	24
Commodity contracts | Power | Net sell
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2027 notional quantity (MWH) | MWh	(31)	(31)	(31)	(31)	(31)
2028 notional quantity (MWH) | MWh	(49)	(49)	(49)	(49)	(49)
2029 notional quantity (MWH) | MWh	(30)	(30)	(30)	(30)	(30)
Thereafter notional quantity (MWH) | MWh	0	0	0	0	0
Total notional quantity (MWH) | MWh	(5)	(5)	(5)	(5)	(5)	(22)	(22)	(22)	(22)	(22)