Summary of Significant Accounting and Reporting Policies - Electric Plant, Depreciation and Amortization (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Summary of Significant Accounting Policies [Line Items]
Convertible Investment Tax Credits	$ 633	$ 693
FPL [Member]
Summary of Significant Accounting Policies [Line Items]
Convertible Investment Tax Credits	$ 106	$ 111

The amount of convertible ITCs recorded during the year. Convertible ITCs are amortized as a reduction to depreciation and amortization expense over the estimated life of the related property, plant and equipment.

No definition available.

Name:	nee_ConvertibleInvestmentTaxCredits
Namespace Prefix:	nee_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration