Commitments and Contingencies (Planned Capital Expenditures) (Details) $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($) MW
FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	$ 4,935
2020	6,020
2021	5,670
2022	5,800
2023	5,980
Total	28,405
Gulf Power [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	605
2020	915
2021	740
2022	465
2023	270
Total	2,995
NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	3,360
2020	3,710
2021	510
2022	260
2023	195
Total	8,035
New Generation Expenditures [Member] \| FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	1,075
2020	1,410
2021	995
2022	1,000
2023	790
Total	5,270
Existing Generation Expenditures [Member] \| FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	985
2020	700
2021	895
2022	760
2023	810
Total	4,150
Transmission And Distribution Expenditures [Member] \| FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	2,205
2020	3,170
2021	3,135
2022	3,530
2023	3,895
Total	15,935
Allowance for funds used during construction (AFUDC) - remainder of 2019	15
Allowance for funds used during construction (AFUDC) - 2020	45
Allowance for funds used during construction (AFUDC) - 2021	45
Allowance for funds used during construction (AFUDC) - 2022	55
Allowance for funds used during construction (AFUDC) - 2023	45
Nuclear Fuel Expenditures [Member] \| FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	125
2020	205
2021	220
2022	165
2023	120
Total	835
General And Other Expenditures [Member] \| FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	545
2020	535
2021	425
2022	345
2023	365
Total	2,215
Wind Expenditures [Member] \| NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	1,580
2020	2,960
2021	130
2022	20
2023	20
Total	$ 4,710
Planned new generation over 5 year period (in megawatts) \| MW	5,740
Solar Expenditures [Member] \| NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	$ 570
2020	230
2021	160
2022	0
2023	5
Total	$ 965
Planned new generation over 5 year period (in megawatts) \| MW	930
Nuclear Expenditures [Member] \| NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	$ 150
2020	160
2021	165
2022	180
2023	130
Total	785
Pipelines [Member] \| NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	570
2020	310
2021	15
2022	20
2023	0
Total	915
Other Expenditures [Member] \| NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	490
2020	50
2021	40
2022	40
2023	40
Total	660
Generation Expenditures [Member] \| FPL [Member]
Planned Capital Expenditures [Line Items]
Allowance for funds used during construction (AFUDC) - remainder of 2019	40
Allowance for funds used during construction (AFUDC) - 2020	70
Allowance for funds used during construction (AFUDC) - 2021	85
Allowance for funds used during construction (AFUDC) - 2022	60
Allowance for funds used during construction (AFUDC) - 2023	35
Corporate and Other [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2019	60
2020	30
2021	15
2022	0
2023	0
Total	$ 105

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Planned Capital Expenditures AFUDC Fourth Year

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Estimated planned capital expenditures for the fifth year.

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Estimated planned capital expenditures for the third year.

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Estimated AFUDC related to Generation for the remainder of the second year.

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Planned New Generation To Be Added over 5 Years in Megawatts

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Total estimated planned capital expenditures.

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