RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Schedule of the Maturity and Notional Principal or Quantity Outstanding Related to Derivative Instruments (Details) - Jun. 30, 2025 € in Millions, £ in Millions, $ in Millions, $ in Millions	USD ($) MWh Bcf MMBbls	GBP (£) MWh Bcf MMBbls	EUR (€) MWh Bcf MMBbls	CAD ($) MWh Bcf MMBbls
Foreign exchange contracts - United States dollar or GBP or Japanese yen forwards - purchase
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025	$ 798
2026	0
2027	0
2028	0
2029	0
Thereafter	0
Total notional principal	798
Foreign exchange contracts - United States dollar or GBP forwards or Euro forwards - sell
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025	3,330	£ 18	€ 63
2026	5,627	28	121
2027	4,841	32	81
2028	3,552	0	67
2029	1,278	0	66
Thereafter	30	0	129
Total notional principal	$ 18,658	£ 78	€ 527
Interest rate contracts - short-term borrowings
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025				$ 1,338
2026				2,230
2027				1,175
2028				549
2029				34
Thereafter				0
Total notional principal				5,326
Interest rate contract - long term debt - Pay Fixed Rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025				1,048
2026				1,860
2027				0
2028				0
2029				0
Thereafter				0
Total notional principal				2,908
Interest rate contract for costless collar
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025				981
2026				1,760
2027				1,319
2028				51
2029				0
Thereafter				0
Total notional principal				$ 4,111
Commodity contracts | Natural gas
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025 notional quantity (bcf / mmbbls) | Bcf	42,000,000	42,000,000	42,000,000	42,000,000
2026 notional quantity (bcf / mmbbls) | Bcf	91,000,000	91,000,000	91,000,000	91,000,000
2027 notional quantity (bcf / mmbbls) | Bcf	56,000,000	56,000,000	56,000,000	56,000,000
2028 notional quantity (bcf / mmbbls) | Bcf	22,000,000	22,000,000	22,000,000	22,000,000
2029 notional quantity (bcf / mmbbls) | Bcf	14,000,000	14,000,000	14,000,000	14,000,000
Thereafter notional quantity (bcf / mmbbls) | Bcf	2,000,000	2,000,000	2,000,000	2,000,000
Total notional quantity (bcf / mmbbls) | Bcf	227,000,000	227,000,000	227,000,000	227,000,000
Commodity contracts | Crude
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025 notional quantity (bcf / mmbbls) | MMBbls	(15,000,000)	(15,000,000)	(15,000,000)	(15,000,000)
2026 notional quantity (bcf / mmbbls) | MMBbls	2,000,000	2,000,000	2,000,000	2,000,000
2027 notional quantity (bcf / mmbbls) | MMBbls	2,000,000	2,000,000	2,000,000	2,000,000
2028 notional quantity (bcf / mmbbls) | MMBbls	1,000,000	1,000,000	1,000,000	1,000,000
2029 notional quantity (bcf / mmbbls) | MMBbls	1,000,000	1,000,000	1,000,000	1,000,000
Thereafter notional quantity (bcf / mmbbls) | MMBbls	1,000,000	1,000,000	1,000,000	1,000,000
Total notional quantity (bcf / mmbbls) | MMBbls	(8,000,000)	(8,000,000)	(8,000,000)	(8,000,000)
Commodity contracts | Power
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2025 notional quantity (MWH) | MWh	149,000,000	149,000,000	149,000,000	149,000,000
2026 notional quantity (MWH) | MWh	142,000,000	142,000,000	142,000,000	142,000,000
2027 notional quantity (MWH) | MWh	85,000,000	85,000,000	85,000,000	85,000,000
2028 notional quantity (MWH) | MWh	30,000,000	30,000,000	30,000,000	30,000,000
2029 notional quantity (MW/H) | MWh	29,000,000	29,000,000	29,000,000	29,000,000
Thereafter notional quantity (MWH) | MWh	(2,000,000)	(2,000,000)	(2,000,000)	(2,000,000)
Total notional quantity (MWH) | MWh	37,000,000	37,000,000	37,000,000	37,000,000