Summary of Significant Accounting and Reporting Policies - Decommissioning of Nuclear Plants, Dismantlement of Plants and Other Accrued Asset Removal Costs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) unit	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Summary of Significant Accounting Policies [Line Items]
Asset Retirement Obligation	$ 3,437	$ 3,328	$ 3,179
St. Lucie Units Number One
Summary of Significant Accounting Policies [Line Items]
License renewal period	20 years
St. Lucie Units Number Two
Summary of Significant Accounting Policies [Line Items]
License renewal period	20 years
FPL [Member]
Summary of Significant Accounting Policies [Line Items]
Maximum Interval Between Nuclear Decommissioning Studies	5 years
Number Of Nuclear Units Of Wholly Owned Subsidiary | unit	4
Ultimate Costs Of Nuclear Decommissioning For Wholly Owned Subsidiary	$ 9,400
FPL's Ultimate costs of nuclear decommissioning, in current year dollars	2,500
Fund Earnings On Decommissioning Funds Of Wholly Owned Subsidiary	144	58	173
Plant Dismantlement Approved Expense	26		48
Ultimate Costs Of Plant Dismantlement	2,400
Ultimate Costs Of Plant Dismantlement In Current Year Dollars	1,200
Asset Retirement Obligation	2,170	2,176	$ 2,107
NEER [Member]
Summary of Significant Accounting Policies [Line Items]
Asset Retirement Obligation	1,300	$ 1,200
Ultimate Costs Of Nuclear Decommissioning For Wholly Owned Indirect Subsidiary	9,800
Ultimate Costs Of Nuclear Decommissioning In Current Year Dollars For Wholly Owned Indirect Subsidiary	2,200
Ultimate costs to dismantle wind and solar facilities	$ 3,100
Effective Period For Decommissioning Funding Plan For Subsidiary	4 years