Derivative Instruments (Balance Sheet Disclosure) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative assets	$ 3,127	$ 3,520
Derivative Asset, Current	1,461	1,730
Derivative Asset, Noncurrent	$ 1,666	$ 1,790
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	$ 3,129	$ 3,586
Derivative Liability, Current	720	845
Derivative Liability, Noncurrent	$ 2,409	$ 2,741
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	$ 90	$ 148
Non Current Derivative Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral	380	307
Current derivative liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	616	815
Commodity contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	2,749	3,135
Derivative liability	2,704	2,903
Derivative asset, netting	(5,737)	(6,171)
Derivative liability, netting	5,883	6,531
Commodity contracts | Level 1 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	2,476	2,640
Derivative Liability, Gross Liability	3,374	3,796
Commodity contracts | Level 2 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	4,412	4,741
Derivative Liability, Gross Liability	4,282	4,664
Commodity contracts | Level 3 | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Gross Asset	1,598	1,925
Derivative Liability, Gross Liability	931	974
Interest rate contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	378	385
Derivative liability	361	634
Derivative asset, netting	58	81
Derivative liability, netting	58	81
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	320	304
Derivative Liability, Gross Liability	303	553
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	0	0
Derivative liability	64	49
Derivative asset, netting	0	0
Derivative liability, netting	0	0
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	64	49
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	14	27
Derivative Asset, Current	2	13
Derivative Asset, Noncurrent	12	14
Derivative liability	23	15
Derivative Liability, Current	16	9
Derivative Liability, Noncurrent	7	6
Florida Power & Light Company | Commodity contracts | Fair value measurements made on a recurring basis [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	14	27
Derivative liability	23	15
Derivative asset, netting	(5)	(3)
Derivative liability, netting	5	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, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement, Net Of Adjustments	0
Derivative Asset, Gross Asset		1
Derivative Liability, Gross Liability	11	13
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	19	29
Derivative Liability, Gross Liability	$ 17	$ 5