Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred tax liabilities:
Property-related	$ 10,910	$ 10,144
Pension	609	552
Investments in partnerships and joint ventures	2,459	3,144
Other	2,126	2,666
Total deferred tax liabilities	16,104	16,506
Deferred tax assets and valuation allowance:
Decommissioning reserves	314	306
Net operating loss carryforwards	262	346
Tax credit carryforwards	3,674	4,905
ARO and accrued asset removal costs	227	199
Regulatory liabilities	1,237	1,332
Other	714	822
Valuation allowance	(240)	(257)
Net deferred tax assets	6,188	7,653
Net deferred income taxes	9,916	8,853
Deferred tax assets and liabilities included in the consolidated balance sheets [Abstract]
Noncurrent other assets	226	219
Deferred income taxes – noncurrent liabilities	(10,142)	(9,072)
Net deferred income taxes	(9,916)	(8,853)
FPL [Member]
Deferred tax liabilities:
Property-related	8,563	8,177
Pension	470	439
Investments in partnerships and joint ventures	3	3
Other	1,431	1,914
Total deferred tax liabilities	10,467	10,533
Deferred tax assets and valuation allowance:
Decommissioning reserves	314	306
Net operating loss carryforwards	2	19
Tax credit carryforwards	0	123
ARO and accrued asset removal costs	111	107
Regulatory liabilities	1,212	1,308
Other	288	295
Valuation allowance	0	0
Net deferred tax assets	1,927	2,158
Net deferred income taxes	8,540	8,375
Deferred tax assets and liabilities included in the consolidated balance sheets [Abstract]
Noncurrent other assets	2	1
Deferred income taxes – noncurrent liabilities	(8,542)	(8,376)
Net deferred income taxes	$ (8,540)	$ (8,375)