Commitments and Contingencies (Planned Capital Expenditures) (Details) $ in Millions	3 Months Ended			57 Months Ended
	Mar. 31, 2018 USD ($) MW	Mar. 31, 2017 USD ($)		Dec. 31, 2022 USD ($)
Planned Capital Expenditures [Line Items]
Capital expenditures of public utility	$ 1,166	$ 1,687	[1]
FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	3,795
2019	3,925
2020	4,410
2021	4,640
2022	4,610
Total	21,380
Capital expenditures of public utility	1,166	$ 1,687	[2]
NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	3,140
2019	2,075
2020	320
2021	280
2022	335
Total	6,150
New Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	430
2019	465
2020	1,245
2021	1,100
2022	1,105
Total	4,345
Allowance for funds used during construction (AFUDC) - remainder of 2018	74
Allowance for funds used during construction (AFUDC) - 2019	46
Allowance for funds used during construction (AFUDC) - 2020	47
Allowance for funds used during construction (AFUDC) - 2021	31
Allowance for funds used during construction (AFUDC) - 2022	14
Existing Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	980
2019	855
2020	460
2021	550
2022	490
Total	3,335
Transmission And Distribution Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	1,870
2019	2,135
2020	2,280
2021	2,545
2022	2,570
Total	11,400
Nuclear Fuel Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	130
2019	150
2020	135
2021	145
2022	165
Total	725
General And Other Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	385
2019	320
2020	290
2021	300
2022	280
Total	1,575
Wind Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	1,550
2019	1,750
2020	40
2021	30
2022	25
Total	$ 3,395
Planned new generation over 5 year period (in megawatts) | MW	4,050
Solar Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	$ 90
2019	0
2020	0
2021	0
2022	0
Total	$ 90
Planned new generation over 5 year period (in megawatts) | MW	100
Nuclear Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	$ 200
2019	225
2020	205
2021	195
2022	240
Total	1,065
Pipelines [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	850
2019	50
2020	25
2021	15
2022	25
Total	965
Other Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	450
2019	50
2020	50
2021	40
2022	45
Total	635
Corporate and Other [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	40
2019	20
2020	30
2021	15
2022	0
Total	$ 105
Scenario, Forecast [Member] | Natural gas plant [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Capital expenditures of public utility				$ 800

[1] Prior period amounts have been retrospectively adjusted as discussed in Note 10 - Restricted Cash.

[2] Prior period amounts have been retrospectively adjusted as discussed in Note 10 - Restricted Cash.