Commitments and Contingencies (Planned Capital Expenditures) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($) MW
FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	$ 1,530
2018	4,645
2019	4,155
2020	4,745
2021	4,500
Total	19,575
NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	705
2018	3,205
2019	1,515
2020	330
2021	280
Total	6,035
New Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	350
2018	625
2019	550
2020	1,310
2021	950
Total	3,785
Allowance for funds used during construction (AFUDC) - remainder of 2017	30
Allowance for funds used during construction (AFUDC) - 2018	85
Allowance for funds used during construction (AFUDC) - 2019	49
Allowance for funds used during construction (AFUDC) - 2020	56
Allowance for funds used during construction (AFUDC) - 2021	35
Existing Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	380
2018	845
2019	675
2020	615
2021	475
Total	2,990
Transmission And Distribution Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	590
2018	2,725
2019	2,530
2020	2,465
2021	2,680
Total	10,990
Nuclear Fuel Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	20
2018	170
2019	150
2020	135
2021	145
Total	620
General And Other Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	190
2018	280
2019	250
2020	220
2021	250
Total	1,190
Wind Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	350
2018	1,925
2019	1,175
2020	45
2021	20
Total	$ 3,515
Planned new generation over 5 year period (in megawatts) | MW	4,075
Solar Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	$ 115
2018	40
2019	5
2020	0
2021	0
Total	$ 160
Planned new generation over 5 year period (in megawatts) | MW	175
Nuclear Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	$ 85
2018	265
2019	225
2020	205
2021	195
Total	975
Pipelines [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	105
2018	915
2019	40
2020	20
2021	10
Total	1,090
Other Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	50
2018	60
2019	70
2020	60
2021	55
Total	295
Corporate and Other [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2017	20
2018	60
2019	85
2020	55
2021	40
Total	$ 260