Commitments and Contingencies (Estimated Planned Capital Expenditures) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) MW
FPL[Member]
Planned Capital Expenditures [Line Items]
2020	$ 6,285
2021	6,305
2022	6,120
2023	6,045
2024	6,340
Total	31,095
FPL[Member] | New Generation Expenditures [Member]
Planned Capital Expenditures [Line Items]
2020	1,345
2021	730
2022	555
2023	500
2024	0
Total	3,130
FPL[Member] | Existing Generation Expenditures [Member]
Planned Capital Expenditures [Line Items]
2020	855
2021	970
2022	930
2023	925
2024	840
Total	4,520
FPL[Member] | Transmission and Distribution Expenditures [Member]
Planned Capital Expenditures [Line Items]
2020	3,150
2021	3,905
2022	4,030
2023	4,120
2024	4,885
Total	20,090
Allowance for funds used during construction (AFUDC) - 2020	40
Allowance for funds used during construction (AFUDC) - 2021	50
Allowance for funds used during construction (AFUDC) - 2022	40
Allowance for funds used during construction (AFUDC) - 2023	25
Allowance for funds used during construction (AFUDC) - 2024	20
FPL[Member] | Nuclear Fuel Expenditures [Member]
Planned Capital Expenditures [Line Items]
2020	205
2021	220
2022	165
2023	120
2024	145
Total	855
FPL[Member] | General and Other Expenditures [Member]
Planned Capital Expenditures [Line Items]
2020	730
2021	480
2022	440
2023	380
2024	470
Total	2,500
FPL[Member] | Generation Expenditures [Member]
Planned Capital Expenditures [Line Items]
Allowance for funds used during construction (AFUDC) - 2020	45
Allowance for funds used during construction (AFUDC) - 2021	70
Allowance for funds used during construction (AFUDC) - 2022	40
Allowance for funds used during construction (AFUDC) - 2023	20
Gulf Power [Member]
Planned Capital Expenditures [Line Items]
2020	800
2021	770
2022	645
2023	650
2024	680
Total	3,545
NEER [Member]
Planned Capital Expenditures [Line Items]
2020	5,860
2021	785
2022	280
2023	205
2024	220
Total	7,350
NEER [Member] | Wind Expenditures [Member]
Planned Capital Expenditures [Line Items]
2020	3,265
2021	20
2022	10
2023	10
2024	10
Total	$ 3,315
Planned New Generation To Be Added over 5 Years | MW	4,400
NEER [Member] | Solar Expenditures [Member]
Planned Capital Expenditures [Line Items]
2020	$ 945
2021	230
2022	5
2023	5
2024	0
Total	$ 1,185
Planned New Generation To Be Added over 5 Years | MW	1,180
NEER [Member] | Nuclear Expenditures [Member]
Planned Capital Expenditures [Line Items]
2020	$ 170
2021	180
2022	170
2023	130
2024	150
Total	800
NEER [Member] | Pipelines [Member]
Planned Capital Expenditures [Line Items]
2020	600
2021	195
2022	20
2023	0
2024	0
Total	815
NEER [Member] | Rate-Regulated Transmission [Member]
Planned Capital Expenditures [Line Items]
2020	300
2021	110
2022	5
2023	0
2024	0
Total	415
NEER [Member] | Other Expenditures [Member]
Planned Capital Expenditures [Line Items]
2020	580
2021	50
2022	70
2023	60
2024	60
Total	$ 820