Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions		12 Months Ended
		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]	$ (165)	$ (1,494)
Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		1,972	961
Special use funds [Abstract]
Equity securities		5,290	4,437
U.S. Government and municipal bonds		757	704
Corporate debt securities		623	722
Asset-backed securities		822	615
Other debt securities		20	20
Other Investments [Abstract]
Equity securities		50	31
U.S. Government and municipal bonds		291	235
Corporate debt securities		523	233
Debt securities		211	67
Level 1 | Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		1,972	961
Restricted cash		34	69
Special use funds [Abstract]
Equity securities		2,349	2,062
U.S. Government and municipal bonds		700	641
Corporate debt securities		3	6
Asset-backed securities		0	0
Other debt securities		6	1
Other Investments [Abstract]
Equity securities		50	30
U.S. Government and municipal bonds		288	117
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		2,742	2,375
U.S. Government and municipal bonds		57	63
Corporate debt securities		620	716
Asset-backed securities		822	615
Other debt securities		14	19
Other Investments [Abstract]
Equity securities		0	1
U.S. Government and municipal bonds		3	118
Corporate debt securities		408	125
Debt securities		196	57
Level 3 | Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		0	0
Special use funds [Abstract]
Equity securities		199	0
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		115	108
Debt securities		$ 15	$ 10
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		$ 12	$ 36
Special use funds [Abstract]
Equity securities		3,536	2,905
U.S. Government and municipal bonds		583	534
Corporate debt securities		458	553
Asset-backed securities		606	473
Other debt securities		11	12
Other Investments [Abstract]
Equity securities		9	9
Debt securities			114
FPL [Member] | Level 1 | Fair Value, Recurring [Member]
Assets [Abstract]
Cash equivalents and restricted cash - equity securities		12	36
Restricted cash		11	33
Special use funds [Abstract]
Equity securities		863	743
U.S. Government and municipal bonds		556	505
Corporate debt securities		3	6
Asset-backed securities		0	0
Other debt securities		5	1
Other Investments [Abstract]
Equity securities		9	9
Debt securities			0
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		2,474	2,162
U.S. Government and municipal bonds		27	29
Corporate debt securities		455	547
Asset-backed securities		606	473
Other debt securities		6	11
Other Investments [Abstract]
Equity securities		0	0
Debt securities			114
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		199	0
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
Debt securities			$ 0

[1] See Note 1 – Disposal of Businesses/Assets and Sale of Noncontrolling Ownership Interests.