Commitments and Contingencies (Planned Capital Expenditures) (Details) $ in Millions	3 Months Ended		36 Months Ended
	Mar. 31, 2016 USD ($) MW	Mar. 31, 2015 USD ($)	Dec. 31, 2019 USD ($)
Planned Capital Expenditures [Line Items]
Capital expenditures	$ 1,133	$ 721
Corporate and Other [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	190
2017	165
2018	125
2019	155
2020	120
Total	755
FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	2,975
2017	3,465
2018	3,105
2019	3,380
2020	3,280
Total	16,205
Capital expenditures	1,133	$ 721
NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	4,270
2017	1,125
2018	840
2019	390
2020	360
Total	6,985
New Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	850
2017	60
2018	5
2019	5
2020	0
Total	920
Allowance for funds used during construction (AFUDC) - remainder of 2016	51
Allowance for funds used during construction (AFUDC) - 2017	14
Allowance for funds used during construction (AFUDC) - 2018	11
Existing Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	500
2017	955
2018	685
2019	535
2020	550
Total	3,225
Transmission And Distribution Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	1,410
2017	2,060
2018	1,985
2019	2,485
2020	2,335
Total	10,275
Nuclear Fuel Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	105
2017	125
2018	190
2019	170
2020	210
Total	800
General And Other Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	110
2017	265
2018	240
2019	185
2020	185
Total	985
Wind Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	1,810
2017	50
2018	35
2019	30
2020	30
Total	$ 1,955
Planned new generation over 5 year period (in megawatts) | MW	1,565
Solar Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	$ 735
2017	10
2018	0
2019	0
2020	0
Total	$ 745
Planned new generation over 5 year period (in megawatts) | MW	860
Nuclear Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	$ 250
2017	235
2018	265
2019	275
2020	245
Total	1,270
Pipelines [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	1,220
2017	775
2018	465
2019	35
2020	20
Total	2,515
Other Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2016	255
2017	55
2018	75
2019	50
2020	65
Total	$ 500
Natural gas-fired combined-cycle unit [Member] | FPL [Member] | Okeechobee County, Florida [Member] | Scenario, Forecast [Member]
Planned Capital Expenditures [Line Items]
Capital expenditures			$ 940