Summary of Significant Accounting and Reporting Policies (Goodwill and Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 5,091	$ 4,854
Other intangible assets not subject to amortization, primarily land easements	136	136
Other intangible assets:
Total	1,706	722
Accumulated amortization	(150)	(99)
Total other intangible assets subject to amortization - net	1,556	623
Intangible assets, amortization [Abstract]
Amortization expense	58	18	$ 25
Amortization Expense Year 1	57
Amortization Expense Year 2	51
Amortization Expense Year 3	49
Amortization Expense Year 4	47
Amortization Expense Year 5	$ 45
Purchased Power Agreements [Member]
Other intangible assets:
Weighted average useful lives (years)	10 years
Total	$ 988	549
Biogas Rights Agreements
Other intangible assets:
Weighted average useful lives (years)	30 years
Total	$ 531	0
Other, primarily transportation contracts and customer lists [Member]
Other intangible assets:
Weighted average useful lives (years)	24 years
Total	$ 187	173
Rate-Regulated Assets [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill	1,218	1,218
Gas Infrastructure [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill	487	487
Clean Energy Assets [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill	315	54
Customer Supply [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill	95	95
Other Goodwill Assets [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill		11
Corporate and Other [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill	11
FPL [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 2,965	$ 2,989