Summary of Significant Accounting and Reporting Policies - Additional Information (Details)		3 Months Ended			9 Months Ended		12 Months Ended	36 Months Ended	48 Months Ended
	Aug. 20, 2025 numberOfGroups	Sep. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2024 USD ($) facility basisPoint	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($) facility basisPoint MW	Dec. 31, 2025 USD ($)	Dec. 31, 2029 USD ($)	Dec. 31, 2029 USD ($) kWh MW	Jul. 23, 2025 USD ($)	Dec. 31, 2024 USD ($)
Accounting Policies [Line Items]
Restricted cash and cash equivalents, current		$ 323,000,000			$ 323,000,000						$ 159,000,000
Cash Received, Derivative, Exchange Traded											(244,000,000)
Restricted Cash											(85,000,000)
Restricted cash related to margin cash collateral that is netted against derivative assets											(279,000,000)
restricted cash related to margin cash collateral that is netted against derivative liabilities		128,000,000			128,000,000
Supplier finance program, obligation		2,300,000,000			2,300,000,000						4,000,000,000.0
Gain in connection with sale		143,000,000		$ 231,000,000	197,000,000	$ 318,000,000
Florida Power & Light Company
Accounting Policies [Line Items]
Tax credits sold					766,000,000	768,000,000
Florida Power & Light Company
Accounting Policies [Line Items]
Number of intervenors who filed a joint motion to approve a stipulation and settlement agreement | numberOfGroups	10
Number of Intervenor Groups | numberOfGroups	13
Restricted cash and cash equivalents, current		48,000,000			48,000,000						101,000,000
Unpaid Storm Restoration Costs		55,000,000	$ 557,000,000
Florida Power & Light Company | Forecast
Accounting Policies [Line Items]
Earned regulatory ROE threshold below which retail base rate relief may be sought									9.95%
Public Utilities, Requested Equity Capital Structure, Percentage									59.60%
Maximum storm surcharge									$ 5
Time Period After Filing of a Cost Recovery Petition that Future Storm Restoration Costs Would Be Recoverable on an Interim Basis									60 days
Earned regulatory ROE threshold above which retail base rate reduction may be sought									11.95%
Increment of usage in Kwh on which storm surcharge is based | kWh									1,000
Cost of recovery, period									12 months
Tariff eligible minimal MW threshold | MW									50
Recoverable storm restoration costs							$ 1,200,000,000
Regulatory Asset, Amortization Period							12 months
Florida Power & Light Company | Forecast | 2026 Rate Agreement
Accounting Policies [Line Items]
Base Rate Proceeding, Rate Plan, Duration									4 years
General Base Revenue Requirement Increase (Decrease)								$ 705,000,000	$ 945,000,000
Regulatory Return On Common Equity, Midpoint									0.1095
Florida Power & Light Company | Forecast | Maximum | 2025 Rate Agreement
Accounting Policies [Line Items]
Deferred tax liabilities								$ 1,155,000,000	$ 1,155,000,000
Florida Power & Light Company | Forecast | Minimum
Accounting Policies [Line Items]
Load factor									0.85
NextEra Energy Resources
Accounting Policies [Line Items]
income associated with differential membership interests		309,000,000		281,000,000	1,120,000,000	986,000,000
NextEra Energy Resources | Rate-Regulated Transmission [Member] | Cash and Cash Equivalents | Disposed of by Sale [Member]
Accounting Policies [Line Items]
Purchase price										$ 270,000,000
NextEra Energy Resources | Three Natural Gas Pipelines and Certain Oil and Gas Shale Formations | Disposed of by Sale [Member]
Accounting Policies [Line Items]
Purchase price				101,000,000		101,000,000
Gain in connection with sale				120,000,000		120,000,000
Gain (after tax) in connection with sale				77,000,000		77,000,000
NextEra Energy Resources | Portfolio of Wind and Solar Generation Facilities | Disposed of by Sale [Member] | United States, Geographically Dispersed
Accounting Policies [Line Items]
Purchase price				900,000,000		900,000,000
Gain in connection with sale				103,000,000		103,000,000
Gain (after tax) in connection with sale				$ 76,000,000		$ 76,000,000
NextEra Energy Resources | Differential Membership Interests
Accounting Policies [Line Items]
Noncontrolling Interests associated with Differential Membership Interests		$ (9,252,000,000)			$ (9,252,000,000)						$ (9,062,000,000)
Subsidiary of NEET | Rate-Regulated Transmission Asset Joint Venture | Rate-Regulated Transmission [Member] | Disposed of by Sale [Member]
Accounting Policies [Line Items]
Equity method investment, percentage sold										50.00%
Subsidiary of NEET | Rate-Regulated Transmission Asset Joint Venture | Rate-Regulated Transmission [Member] | Disposed of by Sale [Member] | Rate-Regulated Transmission Asset Joint Venture
Accounting Policies [Line Items]
Equity method investment, ownership percentage										50.00%
Subsidiaries of NextEra Energy Resources | Certain Oil and Gas Shale Formations | Disposed of by Sale [Member]
Accounting Policies [Line Items]
Ownership percentage sold				100.00%		100.00%
Subsidiaries of NextEra Energy Resources | Three Natural Gas Pipelines | Disposed of by Sale [Member] | Southern U.S.
Accounting Policies [Line Items]
Number of Natural Gas Pipelines Facilities | basisPoint				3		3
Number of Pipeline Facilities NEER Will Continue to Operate | basisPoint				2		2
Subsidiaries of NextEra Energy Resources | Portfolio of Wind and Solar Generation Facilities | Disposed of by Sale [Member] | United States, Geographically Dispersed
Accounting Policies [Line Items]
Number of wind generation facilities | facility				5		5
Number of solar generation facilities | facility				3		3
Generating capacity (MW) | MW						1,634
Subsidiaries of NextEra Energy Resources | Pipeline Joint Venture | Three Natural Gas Pipelines | Disposed of by Sale [Member]
Accounting Policies [Line Items]
Equity method investment, percentage sold				15.00%		15.00%
Subsidiaries of NextEra Energy Resources | Pipeline Joint Venture | Three Natural Gas Pipelines and Certain Oil and Gas Shale Formations | Disposed of by Sale [Member] | Pipeline Joint Venture
Accounting Policies [Line Items]
Equity method investment, ownership percentage				85.00%		85.00%
Subsidiaries of NextEra Energy Resources | Nitro Joint Venture | Portfolio of Wind and Solar Generation Facilities | Disposed of by Sale [Member]
Accounting Policies [Line Items]
Equity method investment, percentage sold				65.00%		65.00%
Subsidiaries of NextEra Energy Resources | Nitro Joint Venture | Portfolio of Wind and Solar Generation Facilities | Disposed of by Sale [Member] | Renewable Assets Joint Venture
Accounting Policies [Line Items]
Equity method investment, ownership percentage				35.00%		35.00%