Commitments and Contingencies (Estimated Planned Capital Expenditures) (Details) $ in Millions	12 Months Ended			36 Months Ended
	Dec. 31, 2015 USD ($) MW	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2019 USD ($)
Planned Capital Expenditures [Line Items]
Capital expenditures	$ 3,428	$ 3,067	$ 2,691
FPL [Member]
Planned Capital Expenditures [Line Items]
2016	4,050
2017	3,385
2018	3,095
2019	3,360
2020	3,280
Total	17,170
Capital expenditures	3,428	$ 3,067	$ 2,691
FPL [Member] | New Generation Expenditures [Member]
Planned Capital Expenditures [Line Items]
2016	1,085
2017	45
2018	0
2019	0
2020	0
Total	1,130
FPL [Member] | Existing Generation Expenditures [Member]
Planned Capital Expenditures [Line Items]
2016	620
2017	960
2018	680
2019	520
2020	550
Total	3,330
FPL [Member] | Transmission and Distribution Expenditures [Member]
Planned Capital Expenditures [Line Items]
2016	1,930
2017	1,990
2018	1,985
2019	2,485
2020	2,335
Total	10,725
FPL [Member] | Nuclear Fuel Expenditures [Member]
Planned Capital Expenditures [Line Items]
2016	170
2017	125
2018	190
2019	170
2020	210
Total	865
FPL [Member] | General and Other Expenditures [Member]
Planned Capital Expenditures [Line Items]
2016	245
2017	265
2018	240
2019	185
2020	185
Total	1,120
FPL [Member] | Generation Expenditures [Member]
Planned Capital Expenditures [Line Items]
Allowance for funds used during construction (AFUDC) - 2016	76
Allowance for funds used during construction (AFUDC) - 2017	14
Allowance for funds used during construction (AFUDC) - 2018	11
NEER [Member]
Planned Capital Expenditures [Line Items]
2016	5,095
2017	1,125
2018	840
2019	420
2020	370
Total	7,850
NEER [Member] | Wind Expenditures [Member]
Planned Capital Expenditures [Line Items]
2016	2,040
2017	75
2018	30
2019	25
2020	25
Total	$ 2,195
Planned New Generation To Be Added over 5 Years | MW	1,365
NEER [Member] | Solar Expenditures [Member]
Planned Capital Expenditures [Line Items]
2016	$ 1,240
2017	10
2018	0
2019	0
2020	0
Total	$ 1,250
Planned New Generation To Be Added over 5 Years | MW	1,045
NEER [Member] | Nuclear Expenditures [Member]
Planned Capital Expenditures [Line Items]
2016	$ 300
2017	240
2018	270
2019	310
2020	265
Total	1,385
NEER [Member] | Pipelines [Member]
Planned Capital Expenditures [Line Items]
2016	1,020
2017	740
2018	465
2019	35
2020	15
Total	2,275
NEER [Member] | Other Expenditures [Member]
Planned Capital Expenditures [Line Items]
2016	495
2017	60
2018	75
2019	50
2020	65
Total	745
Corporate and Other [Member]
Planned Capital Expenditures [Line Items]
2016	215
2017	160
2018	115
2019	140
2020	135
Total	$ 765
Forecast [Member] | FPL [Member] | Natural gas-fired combined-cycle unit [Member] | Okeechobee County, Florida [Member]
Planned Capital Expenditures [Line Items]
Capital expenditures				$ 1,000