Commitments and Contingencies (Planned Capital Expenditures) (Details) $ in Millions	1 Months Ended	9 Months Ended			57 Months Ended
	May 31, 2018 facility	Sep. 30, 2018 USD ($) MW	Sep. 30, 2017 USD ($)		Dec. 31, 2022 USD ($) facility
Planned Capital Expenditures [Line Items]
Capital expenditures of public utility		$ 3,493	$ 3,676	[1]
Number of natural gas generation facilities | facility	2
FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		1,265
2019		4,835
2020		3,790
2021		4,725
2022		4,535
Total		19,150
Capital expenditures of public utility		3,493	$ 3,676	[2]
NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		1,475
2019		3,335
2020		1,845
2021		235
2022		250
Total		7,140
New Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		140
2019		1,090
2020		680
2021		1,130
2022		985
Total		4,025
Existing Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		340
2019		960
2020		475
2021		560
2022		490
Total		2,825
Transmission And Distribution Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		570
2019		2,235
2020		2,175
2021		2,550
2022		2,570
Total		10,100
Nuclear Fuel Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		50
2019		150
2020		135
2021		145
2022		165
Total		645
General And Other Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		165
2019		400
2020		325
2021		340
2022		325
Total		1,555
Wind Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		750
2019		2,155
2020		1,455
2021		20
2022		15
Total		$ 4,395
Planned new generation over 5 year period (in megawatts) | MW		6,100
Solar Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		$ 170
2019		260
2020		170
2021		0
2022		0
Total		$ 600
Planned new generation over 5 year period (in megawatts) | MW		580
Nuclear Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		$ 55
2019		205
2020		160
2021		165
2022		180
Total		765
Pipelines [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		340
2019		660
2020		20
2021		10
2022		20
Total		1,050
Other Expenditures [Member] | NextEra Energy Resources [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		160
2019		55
2020		40
2021		40
2022		35
Total		330
Generation Expenditures [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Allowance for funds used during construction (AFUDC) - remainder of 2018		29
Allowance for funds used during construction (AFUDC) - 2019		57
Allowance for funds used during construction (AFUDC) - 2020		30
Allowance for funds used during construction (AFUDC) - 2021		36
Allowance for funds used during construction (AFUDC) - 2022		38
Corporate and Other [Member]
Planned Capital Expenditures [Line Items]
Remainder of 2018		10
2019		20
2020		30
2021		15
2022		0
Total		$ 75
Scenario, Forecast [Member] | Natural gas plant [Member] | FPL [Member]
Planned Capital Expenditures [Line Items]
Capital expenditures of public utility					$ 800
Number of natural gas generation facilities | facility					2

[1] Prior period amounts have been retrospectively adjusted as discussed in Note 11 - Restricted Cash.

[2] Prior period amounts have been retrospectively adjusted as discussed in Note 11 - Restricted Cash.