Commitments and Contingencies, Long-term Purchase Commitment (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011
FPL [Member]
Required capacity and/or minimum payments [Abstract]
Capacity payments	$ 129,000,000		$ 128,000,000	$ 391,000,000		$ 383,000,000
Energy payments	110,000,000		135,000,000	232,000,000		348,000,000
FPL [Member] | Jea And Southern Subsidiaries Contract Range 1 [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Minimum annual purchase commitments (in megawatts)				1,330
Time period under contracts				through 2015
FPL [Member] | Jea And Southern Subsidiaries Contract Range 2 [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Minimum annual purchase commitments (in megawatts)				375
Time period under contracts				through 2021
FPL [Member] | Qualifying Facilities Contracts [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Minimum total purchase commitments (in megawatts)				705
Expiration dates of purchase commitments				2024 through 2034
FPL [Member] | Natural Gas, Coal, And Oil, Including Transportation And Storage [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Expiration dates of purchase commitments				through 2036
FPL [Member] | Qualifying Facilities Capacity Payments [Member]
Required capacity and/or minimum payments [Abstract]
2012	75,000,000	[1]		75,000,000	[1]
2013	270,000,000	[1]		270,000,000	[1]
2014	275,000,000	[1]		275,000,000	[1]
2015	280,000,000	[1]		280,000,000	[1]
2016	245,000,000	[1]		245,000,000	[1]
Thereafter	2,415,000,000	[1]		2,415,000,000	[1]
FPL [Member] | Jea And Southern Subsidiaries Capacity Payments [Member]
Required capacity and/or minimum payments [Abstract]
2012	60,000,000	[1]		60,000,000	[1]
2013	230,000,000	[1]		230,000,000	[1]
2014	220,000,000	[1]		220,000,000	[1]
2015	195,000,000	[1]		195,000,000	[1]
2016	70,000,000	[1]		70,000,000	[1]
Thereafter	155,000,000	[1]		155,000,000	[1]
FPL [Member] | Natural Gas, Including Transportation And Storage, Contract Minimum Payments [Member]
Required capacity and/or minimum payments [Abstract]
2012	495,000,000	[2]		495,000,000	[2]
2013	1,580,000,000	[2]		1,580,000,000	[2]
2014	1,065,000,000	[2]		1,065,000,000	[2]
2015	570,000,000	[2]		570,000,000	[2]
2016	535,000,000	[2]		535,000,000	[2]
Thereafter	6,935,000,000	[2]		6,935,000,000	[2]
FPL [Member] | Coal Contract Minimum Payments [Member]
Required capacity and/or minimum payments [Abstract]
2012	25,000,000	[2]		25,000,000	[2]
2013	90,000,000	[2]		90,000,000	[2]
2014	35,000,000	[2]		35,000,000	[2]
2015	5,000,000	[2]		5,000,000	[2]
2016	5,000,000	[2]		5,000,000	[2]
Thereafter	0	[2]		0	[2]
NextEra Energy Resources [Member]
Required capacity and/or minimum payments [Abstract]
2012	610,000,000			610,000,000
2013	690,000,000			690,000,000
2014	235,000,000			235,000,000
2015	85,000,000			85,000,000
2016	105,000,000			105,000,000
Thereafter	600,000,000			600,000,000
NextEra Energy Resources [Member] | Contract Group 1 [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Expiration dates of purchase commitments				December 2012 through 2030
Commitment amount included in capital expenditures	1,700,000,000			1,700,000,000
NextEra Energy Resources [Member] | Contract Group 2 [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Expiration dates of purchase commitments				December 2012 through 2033
Corporate and Other [Member]
Required capacity and/or minimum payments [Abstract]
2012	65,000,000	[3]		65,000,000	[3]
2013	30,000,000	[3]		30,000,000	[3]
2014	10,000,000	[3]		10,000,000	[3]
2015	15,000,000	[3]		15,000,000	[3]
2016	15,000,000	[3]		15,000,000	[3]
Thereafter	20,000,000	[3]		20,000,000	[3]
Commitment to invest	$ 68,000,000			$ 68,000,000

[1] Capacity charges under these contracts, substantially all of which are recoverable through the capacity clause, totaled approximately $129 million and $128 million for the three months ended September 30, 2012 and 2011, respectively, and approximately $391 million and $383 million for the nine months ended September 30, 2012 and 2011, respectively. Energy charges under these contracts, which are recoverable through the fuel clause, totaled approximately $110 million and $135 million for the three months ended September 30, 2012 and 2011, respectively

[2] Recoverable through the fuel clause.

[3] Includes an approximately $68 million commitment to invest in clean power and technology businesses through 2017.