Commitments and Contingencies (Long-term Purchase Commitment) (Details) (USD $)			3 Months Ended		9 Months Ended														1 Months Ended				9 Months Ended
	Sep. 30, 2013 NextEra Energy Resources [Member]	Sep. 30, 2013 NextEra Energy Resources [Member] Contract Group 1 [Member]	Sep. 30, 2013 FPL [Member]	Sep. 30, 2012 FPL [Member]	Sep. 30, 2013 FPL [Member]	Sep. 30, 2012 FPL [Member]	Sep. 30, 2013 FPL [Member] Jea And Southern Subsidiaries Contract Range 1 [Member] MW	Sep. 30, 2013 FPL [Member] Jea And Southern Subsidiaries Contract Range 2 [Member] MW	Sep. 30, 2013 FPL [Member] Qualifying Facilities Contracts [Member] MW	Sep. 30, 2013 FPL [Member] Natural Gas, Coal, And Oil, Including Transportation And Storage [Member]	Sep. 30, 2013 FPL [Member] Qualifying Facilities Capacity Payments [Member]		Sep. 30, 2013 FPL [Member] Jea And Southern Subsidiaries Capacity Payments [Member]		Sep. 30, 2013 FPL [Member] Natural Gas, Including Transportation And Storage, Contract Minimum Payments [Member]		Sep. 30, 2013 FPL [Member] Coal Contract Minimum Payments [Member]		Oct. 31, 2013 FPL [Member] Sabal Trail and Florida Southeast Connection [Member] Subsequent Event [Member] MMBTU	Sep. 30, 2013 Sabal Trail [Member]	Sep. 30, 2013 Corporate and Other [Member]		Sep. 30, 2013 Minimum [Member] NextEra Energy Resources [Member] Contract Group 1 [Member]	Sep. 30, 2013 Minimum [Member] NextEra Energy Resources [Member] Contract Group 2 [Member]	Sep. 30, 2013 Maximum [Member] NextEra Energy Resources [Member] Contract Group 1 [Member]	Sep. 30, 2013 Maximum [Member] NextEra Energy Resources [Member] Contract Group 2 [Member]
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Minimum annual purchase commitments (in megawatts)							1,330	375
Time period under contracts							through 2015	through 2021											25-year
Minimum total purchase commitments (in megawatts)									705
Expiration dates of purchase commitments									2024 through 2034	through 2036													November 2013	November 2013	2030	2033
Commitment amount included in capital expenditures		$ 1,900,000,000
Required capacity and/or minimum payments [Abstract]
2013	840,000,000										70,000,000	[1]	55,000,000	[1]	475,000,000	[2]	25,000,000	[2]			40,000,000	[3],[4]
2014	1,025,000,000										285,000,000	[1]	215,000,000	[1]	1,535,000,000	[2]	55,000,000	[2]			20,000,000	[3],[4]
2015	130,000,000										290,000,000	[1]	195,000,000	[1]	570,000,000	[2]	20,000,000	[2]			15,000,000	[3],[4]
2016	160,000,000										250,000,000	[1]	70,000,000	[1]	535,000,000	[2]	20,000,000	[2]			10,000,000	[3],[4]
2017	85,000,000										255,000,000	[1]	50,000,000	[1]	530,000,000	[2]	0	[2]			10,000,000	[3],[4]
Thereafter	590,000,000										2,225,000,000	[1]	10,000,000	[1]	6,400,000,000	[2]	0	[2]			10,000,000	[3],[4]
Capacity payments			121,000,000	129,000,000	365,000,000	391,000,000
Energy payments			93,000,000	110,000,000	202,000,000	232,000,000
Commitment to invest																					60,000,000
JOINT OBLIGATIONS OF NEECH AND NEER INCLUDED IN NEER AMOUNTS																					360,000,000
Equity Method Investment, Ownership Percentage																				33.00%
Long Term Purchase Commiment, Initial Quantity Per Day																			400,000
Long Term Purchase Commitment, Increased Volume Required																			600,000
Long Term Purchase Commitment Annual Amount Required																			$ 410,000,000

[1] Capacity charges under these contracts, substantially all of which are recoverable through the capacity clause, totaled approximately $121 million and $129 million for the three months ended September 30, 2013 and 2012, respectively, and approximately $365 million and $391 million for the nine months ended September 30, 2013 and 2012, respectively. Energy charges under these contracts, which are recoverable through the fuel clause, totaled approximately $93 million and $110 million for the three months ended September 30, 2013 and 2012, respectively, and approximately $202 million and $232 million for the nine months ended September 30, 2013 and 2012, respectively.

[2] Recoverable through the fuel clause.

[3] Excludes approximately $360 million, in 2013, of joint obligations of NEECH and NEER which are included in the NEER amounts above.

[4] Includes an approximately $60 million commitment to invest in clean power and technology businesses through 2021.