Derivative Instruments (Balance Sheet Disclosure) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative assets	$ 3,544	$ 1,824
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current	Other Liabilities, Current
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Derivative Asset, Current	$ 1,431	$ 689
Derivative Asset, Noncurrent	2,113	1,135
Derivative liability	$ 6,036	$ 2,976
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Other Assets, Current	Other Assets, Current
Derivative Liability, Current	$ 2,969	$ 1,263
Derivative Liability, Noncurrent	$ 3,067	1,713
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other
Current Derivative Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral	$ 570	150
Non Current Derivative Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral	221	56
Current derivative liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	6	6
Non Current derivative liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	1,258	172
Commodity contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	3,048	1,757
Derivative liability	5,851	2,198
Derivative asset, netting	(15,990)	(6,622)
Derivative liability, netting	(16,463)	(6,594)
Commodity contracts | Level 1 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	4,477	1,896
Derivative Liability, Gross Liability	6,687	2,571
Commodity contracts | Level 2 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	12,281	5,082
Derivative Liability, Gross Liability	11,671	4,990
Commodity contracts | Level 3 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	2,280	1,401
Derivative Liability, Gross Liability	3,956	1,231
Interest rate contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	519	76
Derivative liability	19	709
Derivative asset, netting	(14)	(30)
Derivative liability, netting	(14)	(30)
Interest rate contracts | Level 1 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	0	0
Derivative Liability, Gross Liability	0	0
Interest rate contracts | Level 2 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	533	106
Derivative Liability, Gross Liability	33	739
Interest rate contracts | Level 3 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	0	0
Derivative Liability, Gross Liability	0	0
Foreign currency contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	(23)	(9)
Derivative liability	166	69
Derivative asset, netting	(23)	(17)
Derivative liability, netting	(23)	(17)
Foreign currency contracts | Level 1 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	0	0
Derivative Liability, Gross Liability	0	0
Foreign currency contracts | Level 2 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	0	8
Derivative Liability, Gross Liability	189	86
Foreign currency contracts | Level 3 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	0	0
Derivative Liability, Gross Liability	0	0
Florida Power & Light Company
Derivatives, Fair Value [Line Items]
Derivative assets	54
Derivative Asset, Current	52	13
Derivative Asset, Noncurrent	2
Derivative liability	24	10
Derivative Liability, Current	20	9
Derivative Liability, Noncurrent	4	1
Florida Power & Light Company | Commodity contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	54	13
Derivative liability	24	10
Derivative asset, netting	(9)	(3)
Derivative liability, netting	(9)	(3)
Florida Power & Light Company | Commodity contracts | Level 1 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	0	0
Derivative Liability, Gross Liability	0	0
Florida Power & Light Company | Commodity contracts | Level 2 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	13	3
Derivative Liability, Gross Liability	4	8
Florida Power & Light Company | Commodity contracts | Level 3 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	50	13
Derivative Liability, Gross Liability	$ 29	$ 5