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Derivative Instruments (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2020 | Dec. 31, 2021
Derivative [Line Items] |  |  |
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent |  | $ 26,000,000 |
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent |  | 6,000,000 |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | $ (2,000,000) |  |
Derivative, Collateral, Obligation to Return Cash | 106,000,000 |  | $ 56,000,000
Margin Cash Collateral Not Netted Against Derivative Liabilities | 268,000,000 |  | 673,000,000
FPL [Member] |  |  |
Derivative [Line Items] |  |  |
Derivative, Collateral, Obligation to Return Cash | 0 |  | 0
Margin Cash Collateral Not Netted Against Derivative Liabilities | $ 0 |  | $ 0
Interest rate contracts | Not Designated as Hedging Instrument [Member] | Gains (Loss) On Disposal Of Businesses/Assets - Net [Member] |  |  |
Derivative [Line Items] |  |  |
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent |  | $ 23,000,000 |

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