Debt (Schedule of Debt Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Current portion of long-term debt	$ 6,901	$ 6,633
Long-term debt, excluding current maturities	61,405	55,256
Repayment prior to maturity	6,901
FPL [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs and premium and discount	(249)	(203)
Total long-term debt	25,274	21,002
Current portion of long-term debt	1,665	1,547
Long-term debt, excluding current maturities	23,609	19,455
Repayment prior to maturity	1,665
FPL [Member] | First mortgage bonds - fixed [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 19,790	$ 15,790
Weighted-average interest rate	4.26%	4.03%
FPL [Member] | Pollution control, solid waste disposal and industrial development revenue bonds - primary variable [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,319	$ 1,366
Weighted-average interest rate	3.75%	3.20%
Variable rate tax exempt bonds	$ 1,319
FPL [Member] | Senior Unsecured Notes - Primarily Variable
Debt Instrument [Line Items]
Long-term debt, gross	$ 4,027	$ 4,042
Weighted-average interest rate	5.04%	3.99%
Floating rate notes that permit individual noteholders to require repayment prior to maturity	$ 1,812
FPL [Member] | Other long-term debt - primarily variable
Debt Instrument [Line Items]
Long-term debt, gross	$ 387	$ 7
Weighted-average interest rate	4.74%	7.90%
NEER [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs and premium and discount	$ (174)	$ (108)
Total long-term debt	11,826	9,051
Current portion of long-term debt	1,031	694
Long-term debt, excluding current maturities	10,795	8,357
NEER [Member] | Senior secured limited-recourse term loans - variable [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 5,943	$ 3,582
Weighted-average interest rate	7.53%	6.24%
NEER [Member] | Senior secured limited-recourse long-term loans - fixed
Debt Instrument [Line Items]
Long-term debt, gross	$ 2,350	$ 2,452
Weighted-average interest rate	3.45%	3.43%
NEER [Member] | Other Long-Term Debt - Primarily Variable [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,183	$ 777
Weighted-average interest rate	7.19%	6.33%
Capital Holdings [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs and premium and discount	$ (149)	$ (135)
Total long-term debt	31,206	31,836
Current portion of long-term debt	4,205	4,392
Long-term debt, excluding current maturities	27,001	27,444
Capital Holdings [Member] | Other long-term debt - primarily variable
Debt Instrument [Line Items]
Long-term debt, gross	$ 300	$ 675
Weighted-average interest rate	6.02%	5.02%
Capital Holdings [Member] | Other long-term debt - primarily fixed
Debt Instrument [Line Items]
Long-term debt, gross	$ 157	$ 164
Weighted-average interest rate	0.92%	0.92%
Capital Holdings [Member] | Debentures - fixed [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 24,365	$ 17,865
Weighted-average interest rate	4.06%	2.99%
Capital Holdings [Member] | Debentures variable [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 400	$ 2,200
Weighted-average interest rate	6.40%	4.14%
Capital Holdings [Member] | Debentures, related to NEE's equity units - fixed [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 2,000	$ 6,500
Weighted-average interest rate	4.60%	2.28%
Capital Holdings [Member] | Junior subordinated debentures - primarily fixed [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 3,723	$ 3,723
Weighted-average interest rate	5.47%	5.23%
Capital Holdings [Member] | Japanese yen denominated long-term debt - fixed
Debt Instrument [Line Items]
Long-term debt, gross	$ 71	$ 506
Weighted-average interest rate	2.63%	0.73%
Capital Holdings [Member] | Australian dollar denominated long-term debt - fixed [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 339	$ 338
Weighted-average interest rate	2.20%	2.20%
NEET [Member] | Other long-term debt - primarily fixed | NEER [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 2,524	$ 2,348
Weighted-average interest rate	5.38%	5.10%