Commitments and Contingencies (Estimated Planned Capital Expenditures) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) MW
Corporate and Other [Member]
Planned Capital Expenditures [Line Items]
2019	$ 70
2020	50
2021	25
2022	10
2023	5
Total	160
FPL[Member]
Planned Capital Expenditures [Line Items]
2019	6,180
2020	4,875
2021	5,650
2022	4,705
2023	4,195
Total	25,605
FPL[Member] | New Generation Expenditures [Member]
Planned Capital Expenditures [Line Items]
2019	1,250
2020	875
2021	1,025
2022	920
2023	790
Total	4,860
FPL[Member] | Existing Generation Expenditures [Member]
Planned Capital Expenditures [Line Items]
2019	1,255
2020	600
2021	820
2022	710
2023	500
Total	3,885
FPL[Member] | Transmission and Distribution Expenditures [Member]
Planned Capital Expenditures [Line Items]
2019	2,840
2020	2,680
2021	3,155
2022	2,640
2023	2,545
Total	13,860
FPL[Member] | Nuclear Fuel Expenditures [Member]
Planned Capital Expenditures [Line Items]
2019	200
2020	205
2021	220
2022	165
2023	120
Total	910
FPL[Member] | General and Other Expenditures [Member]
Planned Capital Expenditures [Line Items]
2019	635
2020	515
2021	430
2022	270
2023	240
Total	2,090
FPL[Member] | Generation Expenditures [Member]
Planned Capital Expenditures [Line Items]
Allowance for funds used during construction (AFUDC) - 2019	67
Allowance for funds used during construction (AFUDC) - 2020	59
Allowance for funds used during construction (AFUDC) - 2021	74
Allowance for funds used during construction (AFUDC) - 2022	62
Allowance for funds used during construction (AFUDC) - 2023	36
NEER [Member]
Planned Capital Expenditures [Line Items]
2019	4,270
2020	1,485
2021	245
2022	260
2023	190
Total	6,450
NEER [Member] | Wind Expenditures [Member]
Planned Capital Expenditures [Line Items]
2019	2,235
2020	995
2021	20
2022	20
2023	20
Total	$ 3,290
Planned New Generation To Be Added over 5 Years | MW	4,395
NEER [Member] | Solar Expenditures [Member]
Planned Capital Expenditures [Line Items]
2019	$ 470
2020	150
2021	0
2022	0
2023	5
Total	$ 625
Planned New Generation To Be Added over 5 Years | MW	575
NEER [Member] | Nuclear Expenditures [Member]
Planned Capital Expenditures [Line Items]
2019	$ 210
2020	160
2021	165
2022	185
2023	130
Total	850
NEER [Member] | Pipelines [Member]
Planned Capital Expenditures [Line Items]
2019	705
2020	130
2021	20
2022	20
2023	0
Total	875
NEER [Member] | Other Expenditures [Member]
Planned Capital Expenditures [Line Items]
2019	650
2020	50
2021	40
2022	35
2023	35
Total	$ 810