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Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Asset retirement obligation, roll forward analysis [Roll Forward]
Beginning balance	$ 3,166	$ 3,506
Liabilities incurred	79	138
Accretion expense	141	169
Liabilities settled	(88)	(53)
Revision in estimated cash flows – net	(119)	(594)
Ending balance	3,179	3,166
Current portion	97	109
Liabilities settled related to project sales and other disposals	35
Restricted funds included in special use funds [Abstract]
Restricted funds	$ 8,846	7,703
St. Lucie Units Number One
Asset retirement obligation, roll forward analysis [Roll Forward]
License renewal period	20 years
St. Lucie Units Number Two
Asset retirement obligation, roll forward analysis [Roll Forward]
License renewal period	20 years
FPL [Member]
Asset retirement obligation, roll forward analysis [Roll Forward]
Beginning balance	$ 1,936	2,410
Liabilities incurred	7	0
Accretion expense	78	103
Liabilities settled	(15)	(32)
Revision in estimated cash flows – net	101	(545)
Ending balance	2,107	1,936
Current portion	58	65
Restricted funds included in special use funds [Abstract]
Restricted funds	$ 6,082	$ 5,271
FPL [Member] | St. Lucie Units Number One
Asset retirement obligation, roll forward analysis [Roll Forward]
License renewal period	20 years
FPL [Member] | St. Lucie Units Number Two
Asset retirement obligation, roll forward analysis [Roll Forward]
License renewal period	20 years

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Asset Retirement Obligation, Liabilities Settled, Project Sales And Other Disposals

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The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
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Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

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Current portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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Carrying amount of an asset that is legally restricted for purposes of settling an asset retirement obligation.

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Amount of asset retirement obligations incurred during the period.

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Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.

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Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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