Derivative Instruments (Balance Sheet Disclosure) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Derivative assets	$ 2,692	$ 2,653
Derivative Asset, Current	853	879
Derivative Asset, Noncurrent	$ 1,839	$ 1,774
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Other assets, current	Other assets, current
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other	Other
Derivative liability	$ 3,509	$ 3,081
Derivative Liability, Current	1,131	1,073
Derivative Liability, Noncurrent	$ 2,378	$ 2,008
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
Current Derivative Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral	$ 73	$ 154
Non Current Derivative Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral	46	321
Current derivative liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	96
Non Current derivative liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	32
Commodity contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	2,592	2,125
Derivative liability	2,483	2,742
Derivative asset, netting	(3,786)	(4,032)
Derivative liability, netting	(3,795)	(3,557)
Commodity contracts | Level 1 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	1,656	1,778
Derivative Liability, Gross Liability	2,030	1,983
Commodity contracts | Level 2 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	2,831	3,040
Derivative Liability, Gross Liability	3,262	3,364
Commodity contracts | Level 3 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	1,891	1,339
Derivative Liability, Gross Liability	986	952
Interest rate contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	103	533
Derivative liability	897	240
Derivative asset, netting	(45)	(44)
Derivative liability, netting	(45)	(44)
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	148	577
Derivative Liability, Gross Liability	917	284
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	25	0
Foreign currency contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	(3)	(5)
Derivative liability	129	99
Derivative asset, netting	(3)	(5)
Derivative liability, netting	(3)	(5)
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	0
Derivative Liability, Gross Liability	132	104
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	17	40
Derivative Asset, Current	15	31
Derivative Asset, Noncurrent	2	9
Derivative liability	12	7
Derivative Liability, Current	10	3
Derivative Liability, Noncurrent	2	4
Florida Power & Light Company | Commodity contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	17	40
Derivative liability	12	7
Derivative asset, netting	(11)	(16)
Derivative liability, netting	(11)	(11)
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	4	9
Derivative Liability, Gross Liability	6	5
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	24	47
Derivative Liability, Gross Liability	$ 17	$ 13