Commitments and Contingencies (Planned Capital Expenditures) (Details) $ in Millions	6 Months Ended			57 Months Ended
	Jun. 30, 2018 USD ($) MW	Jun. 30, 2017 USD ($)		Dec. 31, 2022 USD ($)
Planned Capital Expenditures [Line Items]
Capital expenditures of public utility	$ 2,414	$ 2,648	[1]
FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	2,575
2019	4,025
2020	4,465
2021	4,690
2022	4,620
Total	20,375
Capital expenditures of public utility	2,414	$ 2,648	[2]
NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	2,920
2019	2,425
2020	960
2021	265
2022	305
Total	6,875
New Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	290
2019	455
2020	1,300
2021	1,130
2022	1,115
Total	4,290
Existing Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	630
2019	970
2020	475
2021	570
2022	490
Total	3,135
Transmission And Distribution Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	1,305
2019	2,125
2020	2,265
2021	2,545
2022	2,570
Total	10,810
Nuclear Fuel Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	55
2019	150
2020	135
2021	145
2022	165
Total	650
General And Other Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	295
2019	325
2020	290
2021	300
2022	280
Total	1,490
Wind Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	1,500
2019	1,850
2020	685
2021	30
2022	25
Total	$ 4,090
Planned new generation over 5 year period (in megawatts) | MW	5,085
Solar Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	$ 255
2019	125
2020	0
2021	0
2022	0
Total	$ 380
Planned new generation over 5 year period (in megawatts) | MW	305
Nuclear Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	$ 130
2019	240
2020	205
2021	190
2022	230
Total	995
Pipelines [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	780
2019	155
2020	20
2021	10
2022	20
Total	985
Other Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018	255
2019	55
2020	50
2021	35
2022	30
Total	425
Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Allowance for funds used during construction (AFUDC) - remainder of 2018	56
Allowance for funds used during construction (AFUDC) - 2019	50
Allowance for funds used during construction (AFUDC) - 2020	47
Allowance for funds used during construction (AFUDC) - 2021	35
Allowance for funds used during construction (AFUDC) - 2022	37
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 11 - Restricted Cash.

[2] Prior period amounts have been retrospectively adjusted as discussed in Note 11 - Restricted Cash.