Commitments and Contingencies (Planned Capital Expenditures) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($) MW
Corporate and Other [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	$ 155
2016	1,215
2017	915
2018	505
2019	160
Total	2,950
FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	1,185
2016	3,845
2017	2,800
2018	2,470
2019	2,455
Total	12,755
NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	1,210
2016	2,655
2017	350
2018	375
2019	365
Total	4,955
New Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	150
2016	865
2017	45
2018	0
2019	0
Total	1,060
Existing Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	375
2016	585
2017	660
2018	535
2019	470
Total	2,625
Transmission And Distribution Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	510
2016	1,960
2017	1,755
2018	1,625
2019	1,680
Total	7,530
Nuclear Fuel Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	20
2016	220
2017	125
2018	150
2019	175
Total	690
General And Other Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	130
2016	215
2017	215
2018	160
2019	130
Total	850
Wind Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	235
2016	1,185
2017	65
2018	15
2019	10
Total	$ 1,510
Planned new generation over 5 year period (in megawatts) | MW	1,790
Wind Expenditures [Member] | Subsequent Event [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Planned new generation over 5 year period (in megawatts) | MW	125
Solar Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	$ 780
2016	1,100
2017	0
2018	0
2019	0
Total	$ 1,880
Planned new generation over 5 year period (in megawatts) | MW	1,155
Solar Expenditures [Member] | Subsequent Event [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Planned new generation over 5 year period (in megawatts) | MW	220
Nuclear Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	$ 90
2016	300
2017	240
2018	260
2019	310
Total	1,200
Other Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder Current Year	105
2016	70
2017	45
2018	100
2019	45
Total	365
Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Allowance for funds used during construction (AFUDC) - remainder of 2015	28
Allowance for funds used during construction (AFUDC) - 2016	79
Allowance for funds used during construction (AFUDC) - 2017	$ 13