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Summary of Significant Accounting and Reporting Policies - Additional Information (Details) $ in Millions	1 Months Ended		3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($) facility basisPoint	Apr. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($) facility basisPoint	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($) facility MW	Sep. 30, 2024 USD ($) facility basisPoint MW	Sep. 30, 2023 USD ($)	Dec. 31, 2025 USD ($)	Oct. 22, 2024 USD ($)	Dec. 31, 2023 USD ($)
Accounting Policies [Line Items]
Restricted cash and cash equivalents, current	$ 311.0			$ 311.0			$ 311.0				$ 730.0
Restricted cash related to margin cash collateral that is netted against derivative assets	(138.0)			(138.0)			(138.0)				(194.0)
restricted cash related to margin cash collateral that is netted against derivative liabilities	207.0			207.0			207.0				815.0
Gain in connection with sale				231.0	$ 7.0		318.0	$ 11.0
Investment in equity method investees	7,259.0			7,259.0			7,259.0				6,156.0
Distributions of earnings from equity method investees							641.0	520.0
Supplier finance program, obligation	1,600.0			1,600.0			1,600.0				4,700.0
Florida Power & Light Company
Accounting Policies [Line Items]
Tax credits sold							768.0
Florida Power & Light Company
Accounting Policies [Line Items]
Natural Gas Mid-Course Correction, Value		$ 662.0
Fuel Mid-Course Correction, Period		8 months
Recoverable storm restoration costs	300.0
Storm reserve, value	80.0			80.0			80.0
Recoverable restoration costs in excess of storm reserve	200.0			200.0			200.0
Restricted cash and cash equivalents, current	102.0			102.0			102.0				15.0
Florida Power & Light Company \| Forecast
Accounting Policies [Line Items]
Recoverable storm restoration costs									$ 1,200.0
Storm reserve, value									$ 150.0
Recoverable restoration costs in excess of storm reserve										$ 800.0
NextEra Energy Resources
Accounting Policies [Line Items]
Investment in equity method investees					4,200.0			4,200.0
income associated with differential membership interests				281.0	$ 212.0		986.0	$ 820.0
NextEra Energy Resources \| Disposed of by Sale [Member] \| Three Natural Gas Pipelines and Certain Oil and Gas Shale Formations
Accounting Policies [Line Items]
Purchase price	101.0			101.0			101.0
Gain in connection with sale				120.0			120.0
Gain (after tax) in connection with sale				77.0			77.0
Plant, Property, and Equipment, Decrease from Deconsolidation							2,211.0
Long-term Debt, Decrease from Deconsolidation							1,833.0
Investment in equity method investees	396.0			396.0			396.0
NextEra Energy Resources \| United States, Geographically Dispersed \| Disposed of by Sale [Member] \| Portfolio of Wind and Solar Generation Facilities
Accounting Policies [Line Items]
Purchase price	900.0			900.0			900.0
Gain in connection with sale				103.0			103.0
Gain (after tax) in connection with sale				76.0			76.0
Plant, Property, and Equipment, Decrease from Deconsolidation							2,520.0
Noncontrolling Interest, Decrease from Deconsolidation							844.0
Investment in equity method investees	831.0			831.0			831.0
NextEra Energy Resources \| United States, Geographically Dispersed \| Disposed of by Sale [Member] \| Portfolio of Wind and Solar Generation Facilities \| Forecast
Accounting Policies [Line Items]
Distributions of earnings from equity method investees			$ 390.0
NextEra Energy Resources \| United States, Geographically Dispersed \| Disposed of by Sale [Member] \| Five wind generation facilities and three solar facilities located in multiple regions
Accounting Policies [Line Items]
Purchase price						$ 566.0
Disposal Group, Including Discontinued Operation, Working Capital						$ 32.0
NextEra Energy Resources \| Differential Membership Interests
Accounting Policies [Line Items]
Noncontrolling Interests associated with Differential Membership Interests	$ 8,043.0			$ 8,043.0			$ 8,043.0				$ 8,857.0
Subsidiaries of NextEra Energy Resources \| Disposed of by Sale [Member] \| Certain Oil and Gas Shale Formations
Accounting Policies [Line Items]
Ownership percentage sold	100.00%			100.00%			100.00%
Subsidiaries of NextEra Energy Resources \| United States, Geographically Dispersed \| Disposed of by Sale [Member] \| Portfolio of Wind and Solar Generation Facilities
Accounting Policies [Line Items]
Number of wind generation facilities \| facility	5			5			5
Number of solar generation facilities \| facility	3			3			3
Generating capacity (MW) \| MW							1,634
Subsidiaries of NextEra Energy Resources \| United States, Geographically Dispersed \| Disposed of by Sale [Member] \| Five wind generation facilities and three solar facilities located in multiple regions
Accounting Policies [Line Items]
Number of wind generation facilities \| facility						5
Number of solar generation facilities \| facility						3
Generating capacity (MW) \| MW						688
Subsidiaries of NextEra Energy Resources \| Southern U.S. \| Disposed of by Sale [Member] \| Three Natural Gas Pipelines
Accounting Policies [Line Items]
Number of Natural Gas Pipelines Facilities \| basisPoint	3			3			3
Number of Pipeline Facilities NEER Will Continue to Operate \| basisPoint	2			2			2
Subsidiaries of NextEra Energy Resources \| NEP \| United States, Geographically Dispersed \| Disposed of by Sale [Member] \| Five wind generation facilities and three solar facilities located in multiple regions
Accounting Policies [Line Items]
Ownership percentage sold						100.00%
Subsidiaries of NextEra Energy Resources \| Pipeline Joint Venture \| Disposed of by Sale [Member] \| Three Natural Gas Pipelines
Accounting Policies [Line Items]
Equity method investment, percentage sold	15.00%			15.00%			15.00%
Subsidiaries of NextEra Energy Resources \| Pipeline Joint Venture \| Disposed of by Sale [Member] \| Three Natural Gas Pipelines and Certain Oil and Gas Shale Formations \| Pipeline Joint Venture
Accounting Policies [Line Items]
Equity method investment, ownership percentage	85.00%			85.00%			85.00%
Subsidiaries of NextEra Energy Resources \| Nitro Joint Venture \| Disposed of by Sale [Member] \| Portfolio of Wind and Solar Generation Facilities
Accounting Policies [Line Items]
Equity method investment, percentage sold	65.00%			65.00%			65.00%
Subsidiaries of NextEra Energy Resources \| Nitro Joint Venture \| Disposed of by Sale [Member] \| Portfolio of Wind and Solar Generation Facilities \| Renewable Assets Joint Venture
Accounting Policies [Line Items]
Equity method investment, ownership percentage	35.00%			35.00%			35.00%