Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Investments [Abstract]
Restricted Cash and Cash Equivalents, Statement of Financial Position [Extensible Enumeration]		Other	Other
Noncontrolling Interest [Member]
Other Investments [Abstract]
Disposal of subsidiaries with noncontrolling interests	[1]	$ (846)	$ (165)	$ (1,494)
Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		677	1,972
Special use funds [Abstract]
Equity securities		6,164	5,290
U.S. Government and municipal bonds		722	757
Corporate debt securities		685	623
Asset-backed securities		873	822
Other debt securities		14	20
Other Investments [Abstract]
Equity securities		49	50
U.S. Government and municipal bonds		161	291
Corporate debt securities		869	523
Debt securities		348	211
Level 1 | Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		677	1,972
Restricted cash		109	34
Special use funds [Abstract]
Equity securities		2,614	2,349
U.S. Government and municipal bonds		663	700
Corporate debt securities		5	3
Asset-backed securities		0	0
Other debt securities		0	6
Other Investments [Abstract]
Equity securities		48	50
U.S. Government and municipal bonds		158	288
Corporate debt securities		0	0
Debt securities		0	0
Level 2 | Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		0	0
Special use funds [Abstract]
Equity securities		3,321	2,742
U.S. Government and municipal bonds		59	57
Corporate debt securities		680	620
Asset-backed securities		873	822
Other debt securities		14	14
Other Investments [Abstract]
Equity securities		1	0
U.S. Government and municipal bonds		3	3
Corporate debt securities		758	408
Debt securities		295	196
Level 3 | Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		0	0
Special use funds [Abstract]
Equity securities		229	199
U.S. Government and municipal bonds		0	0
Corporate debt securities		0	0
Asset-backed securities		0	0
Other debt securities		0	0
Other Investments [Abstract]
Equity securities		0	0
U.S. Government and municipal bonds		0	0
Corporate debt securities		111	115
Debt securities		$ 53	$ 15
FPL [Member]
Other Investments [Abstract]
Restricted Cash and Cash Equivalents, Statement of Financial Position [Extensible Enumeration]		Other	Other
FPL [Member] | Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		$ 101	$ 12
Special use funds [Abstract]
Equity securities		4,219	3,536
U.S. Government and municipal bonds		561	583
Corporate debt securities		510	458
Asset-backed securities		660	606
Other debt securities		10	11
Other Investments [Abstract]
Equity securities		8	9
FPL [Member] | Level 1 | Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		101	12
Restricted cash		101	11
Special use funds [Abstract]
Equity securities		1,028	863
U.S. Government and municipal bonds		522	556
Corporate debt securities		4	3
Asset-backed securities		0	0
Other debt securities		0	5
Other Investments [Abstract]
Equity securities		8	9
FPL [Member] | Level 2 | Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		0	0
Special use funds [Abstract]
Equity securities		2,987	2,474
U.S. Government and municipal bonds		39	27
Corporate debt securities		506	455
Asset-backed securities		660	606
Other debt securities		10	6
Other Investments [Abstract]
Equity securities		0	0
FPL [Member] | Level 3 | Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		0	0
Special use funds [Abstract]
Equity securities		204	199
U.S. Government and municipal bonds		0	0
Corporate debt securities		0	0
Asset-backed securities		0	0
Other debt securities		0	0
Other Investments [Abstract]
Equity securities		$ 0	$ 0

[1] See Note 1 – Disposal of Businesses/Assets.