RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Notional Principal or Quantity Information (Details) - Sep. 30, 2022 € in Millions, ¥ in Millions, £ in Millions, $ in Millions, $ in Millions	USD ($)	GBP (£)	EUR (€)	JPY (¥)	CAD ($)	Bcf	MMBbls	MWh
Foreign exchange contracts - forwards - purchase
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Derivative Notional Amount Outstanding	$ 2,303			¥ 84,800
Foreign exchange contracts - forwards - purchase | United States dollar
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022	799
2023	4
2024	1,000
2025	500
2026	0
Thereafter	0
Foreign exchange contracts - forwards - purchase | Japanese yen
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 | ¥				0
2023 | ¥				0
2024 | ¥				0
2025 | ¥				84,800
2026 | ¥				0
Thereafter | ¥				¥ 0
Foreign exchange contracts - forwards - sell
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Derivative Notional Amount Outstanding	25,939	£ 156	€ 720
Foreign exchange contracts - forwards - sell | United States dollar
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022	3,017
2023	7,185
2024	6,134
2025	4,361
2026	3,761
Thereafter	$ 1,481
Foreign exchange contracts - forwards - sell | GBP
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 | £		7
2023 | £		29
2024 | £		30
2025 | £		30
2026 | £		28
Thereafter | £		£ 32
Foreign exchange contracts - forwards - sell | Euro
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 | €			23
2023 | €			92
2024 | €			91
2025 | €			86
2026 | €			85
Thereafter | €			€ 343
Interest rate contracts - short-term borrowings
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022					$ 2,715
2023					3,190
2024					241
2025					31
2026					26
Thereafter					64
Derivative Notional Amount Outstanding					6,267
Interest rate contracts - long-term debt pay fixed rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022					900
2023					4,099
2024					1,781
2025					594
2026					0
Thereafter					0
Derivative Notional Amount Outstanding					7,374
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022					0
2023					36
2024					31
2025					11
2026					0
Thereafter					0
Derivative Notional Amount Outstanding					$ 78
Commodity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Derivative Nonmonetary Notional Amount Outstanding						119,000,000	3,000,000
Commodity contracts | Natural gas
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 (bcf / mmbbls) | Bcf						33,000,000
2023 (bcf / mmbbls) | Bcf						49,000,000
2024 (bcf / mmbbls) | Bcf						21,000,000
2025 (bcf / mmbbls) | Bcf						13,000,000
2026 (bcf / mmbbls) | Bcf						3,000,000
Thereafter (bcf / mmbbls) | Bcf						0
Commodity contracts | Crude
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 (bcf / mmbbls) | MMBbls							3,000,000
2023 (bcf / mmbbls) | MMBbls							0
2024 (bcf / mmbbls) | MMBbls							0
2025 (bcf / mmbbls) | MMBbls							0
2026 (bcf / mmbbls) | MMBbls							0
Thereafter (bcf / mmbbls) | MMBbls							0
Net sell | Commodity contracts | Power
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2022 (MWH) | MWh								5,000,000
2023 (MWH) | MWh								(25,000,000)
2024 (MWH) | MWh								(33,000,000)
2025 (MWH) | MWh								(43,000,000)
2026 (MWH) | MWh								0
Thereafter (MWH) | MWh								0
Total (MWH) | MWh								(31)