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Summary of Significant Accounting and Reporting Policies (Goodwill and Intangible Assets) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Goodwill and Intangible Assets [Line Items] |  |  |
Goodwill | $ 4,866 | $ 5,091 |
Other intangible assets not subject to amortization, primarily land easements | 137 | 136 |
Other intangible assets: |  |  |
Total | 1,780 | 1,706 |
Accumulated amortization | (202) | (150) |
Total other intangible assets subject to amortization - net | 1,578 | 1,556 |
Intangible assets, amortization [Abstract] |  |  |
Amortization expense | 62 | 58 | $ 18
Amortization Expense Year 1 | 55 |  |
Amortization Expense Year 2 | 54 |  |
Amortization Expense Year 3 | 50 |  |
Amortization Expense Year 4 | 46 |  |
Amortization Expense Year 5 | $ 45 |  |
Purchased Power Agreements [Member] |  |  |
Other intangible assets: |  |  |
Weighted average useful lives (years) | 17 years |  |
Total | $ 633 | 988 |
Biogas Rights Agreements |  |  |
Other intangible assets: |  |  |
Weighted average useful lives (years) | 28 years |  |
Total | $ 933 | 531 |
Other, primarily transportation contracts and customer lists [Member] |  |  |
Other intangible assets: |  |  |
Weighted average useful lives (years) | 19 years |  |
Total | $ 214 | 187 |
Rate-Regulated Assets [Member] |  |  |
Goodwill and Intangible Assets [Line Items] |  |  |
Goodwill | 1,167 | 1,218 |
Gas Infrastructure [Member] |  |  |
Goodwill and Intangible Assets [Line Items] |  |  |
Goodwill | 0 | 487 |
Clean Energy Assets [Member] |  |  |
Goodwill and Intangible Assets [Line Items] |  |  |
Goodwill | 424 | 315 |
Customer Supply [Member] |  |  |
Goodwill and Intangible Assets [Line Items] |  |  |
Goodwill | 299 | 95 |
Corporate and Other [Member] |  |  |
Goodwill and Intangible Assets [Line Items] |  |  |
Goodwill | 11 | 11 |
FPL [Member] |  |  |
Goodwill and Intangible Assets [Line Items] |  |  |
Goodwill | $ 2,965 | $ 2,965 |

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