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Acquisitions (Details) $ in Millions | Mar. 21, 2023 USD ($) numberOfProjects | Mar. 31, 2021 USD ($) state utlity mi | Dec. 31, 2023 USD ($) county | Dec. 31, 2022 USD ($) | Jan. 01, 2021 USD ($)
--- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  | $ 5,091 | $ 4,854 |
Gulf Power [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Debt assumed |  |  |  |  | $ 1,800
Assets assumed |  |  |  |  | 6,700
Property, plant, and equipment |  |  |  |  | 4,900
Regulatory assets |  |  |  |  | 1,200
Assumed liabilities |  |  |  |  | 3,900
Regulatory liabilities |  |  |  |  | 566
Deferred income taxes |  |  |  |  | 729
GridLiance [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Assets assumed |  | $ 384 |  |  |
Assumed liabilities |  | 210 |  |  |
Goodwill |  | 592 |  |  |
Goodwill, expected tax deductible amount |  | 586 |  |  |
Cash consideration |  | 502 |  |  |
Business combination, assumption of debt |  | 175 |  |  |
Contingent consideration, liability |  | $ 264 |  |  |
FPL [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of counties In which entity operates | county |  |  | 8 |  |
Goodwill |  |  | $ 2,965 | 2,989 |
FPL [Member] | Gulf Power [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  |  |  | $ 2,700
GridLiance Holdco, LP and GridLiance GP, LLC | GridLiance [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Length of power lines (mi) | mi |  | 700 |  |  |
Number Of FERC-Regulated Transmission Utilities | utlity |  | 3 |  |  |
Number of States in which Entity Operates | state |  | 6 |  |  |
GridLiance Holdco, LP and GridLiance GP, LLC | GridLiance [Member] | Midwest And Nevada [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of States in which Entity Operates | state |  | 5 |  |  |
NEER [Member] | GridLiance [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Contingent consideration, liability |  |  | $ 126 | $ 203 |
NEER [Member] | RNG Acquisition |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Assets assumed | $ 1,300 |  |  |  |
Assumed liabilities | 300 |  |  |  |
Goodwill | 300 |  |  |  |
Goodwill, expected tax deductible amount | 200 |  |  |  |
Cash consideration | 1,100 |  |  |  |
Business combination, assumption of debt | $ 34 |  |  |  |
Number of RNG projects | numberOfProjects | 31 |  |  |  |
Number Of RNG Projects, Renewable Gas Facility | numberOfProjects | 1 |  |  |  |
Business Combination, Acquisition, Noncontrolling Interest, Fair Value | $ 100 |  |  |  |

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