Commitments and Contingencies (Long-term Purchase Commitment) (Details) $ in Millions		3 Months Ended		6 Months Ended
	May. 01, 2017 MMBTU / d	Jun. 30, 2015 USD ($) MW	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) MW	Jun. 30, 2014 USD ($)
Corporate and Other [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2015		$ 255		$ 255
2016		915		915
2017		710		710
2018		380		380
2019		65		65
Thereafter		25		25
Commitment to invest		75		75
Joint Obligations Of NEECH and NEER included NEER Amounts due in the current year		450		450
Joint Obligations Of NEECH and NEER included NEER Amounts due in the second year		335		335
FPL [Member]
Required capacity and/or minimum payments [Abstract]
Capacity payments		117	$ 123	236	$ 246
Energy payments		$ 78	$ 75	$ 122	$ 132
Coal Fired Generating Facility Capacity (in MW) | MW		250		250
Purchase price of coal-fired generation facility		$ 521		$ 521
Remaining minimum payments under the long-term purchased power agreement		1,480		$ 1,480
FPL [Member] | Jea And Southern Subsidiaries Contract Range 1 [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Minimum annual purchase commitments (in megawatts) | MW				1,330
FPL [Member] | Jea And Southern Subsidiaries Contract Range 2 [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Minimum annual purchase commitments (in megawatts) | MW				375
FPL [Member] | Qualifying Facilities Contracts [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Minimum total purchase commitments (in megawatts) | MW				705
FPL [Member] | Qualifying Facilities Capacity Payments [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2015		145		$ 145
2016		250		250
2017		255		255
2018		260		260
2019		265		265
Thereafter		1,695		1,695
FPL [Member] | Jea And Southern Subsidiaries Capacity Payments [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2015		100		100
2016		70		70
2017		60		60
2018		30		30
2019		10		10
Thereafter		0		0
FPL [Member] | Natural Gas, Including Transportation And Storage, Contract Minimum Payments [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2015		715		715
2016		885		885
2017		795		795
2018		830		830
2019		830		830
Thereafter		13,780		13,780
FPL [Member] | Coal Contract Minimum Payments [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2015		60		60
2016		50		50
2017		35		35
2018		0		0
2019		0		0
Thereafter		0		0
FPL [Member] | Scenario, Forecast [Member] | Sabal Trail and Florida Southeast Connection [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Time period under contracts	25 years
Long Term Purchase Commiment, Initial Quantity Per Day | MMBTU / d	400,000
Long Term Purchase Commitment, Increased Volume Required | MMBTU / d	600,000
FPL [Member] | Sabal Trail and Florida Southeast Connection [Member] | Natural Gas, Including Transportation And Storage, Contract Minimum Payments [Member]
Required capacity and/or minimum payments [Abstract]
2017		200		200
2018		295		295
2019		290		290
Thereafter		8,245		8,245
NextEra Energy Resources [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2015		1,730		1,730
2016		1,250		1,250
2017		140		140
2018		135		135
2019		80		80
Thereafter		395		395
NextEra Energy Resources [Member] | Contract Group 1 [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Commitment amount included in capital expenditures		3,100		3,100
Natural Gas Expenditures [Member] | Corporate and Other [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
commitment to invest in pipeline		$ 2,300		$ 2,300