Debt (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
FPL [Member] | First mortgage bonds [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.75%
Principal Amount	$ 500.0
Capital Holdings and NextEra Energy Resources subsidiary [Member] | Canadian revolving credit agreements [Member]
Debt Instrument [Line Items]
Interest Rate Terms	Variable	[1]
Increase of additional borrowings on existing and new debt instruments	189
NextEra Energy Resources Subsidiaries [Member] | Eurodollar denominated senior secured limited recourse loan due 2030 [Member]
Debt Instrument [Line Items]
Interest Rate Terms	Variable	[1],[2]
Increase of additional borrowings on existing and new debt instruments	106	[3]
Lone Star [Member] | Senior secured limited-recourse loan [Member]
Debt Instrument [Line Items]
Interest Rate Terms	Variable	[1]
Increase of additional borrowings on existing and new debt instruments	77
Capital Holdings [Member] | Junior subordinated debentures sold in January 2013 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.00%
Principal Amount	450.0
Capital Holdings [Member] | Debentures [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.625%
Principal Amount	250.0
Capital Holdings [Member] | Debentures Related To Nextera Energys Equity Units [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.45%
Principal Amount	500.0
NextEra Energy Resources subsidiary [Member] | term loan facility [Member]
Debt Instrument [Line Items]
Interest Rate Terms	Variable	[1]
Increase of additional borrowings on existing and new debt instruments	62
NextEra Energy Resources subsidiary [Member] | senior secured limited recourse term loan due 2021 [Member]
Debt Instrument [Line Items]
Interest Rate Terms	Variable	[1],[2]
Principal Amount	66.0
NextEra Energy Resources subsidiary [Member] | Senior secured limited recourse term loan due 2031 [Member]
Debt Instrument [Line Items]
Interest Rate Terms	Variable	[1],[2]
Principal Amount	254.0
NextEra Energy Resources subsidiary [Member] | Senior secured limited-recourse term loan [Member]
Debt Instrument [Line Items]
Interest Rate Terms	Variable	[4]
Principal Amount	$ 1,150.0

[1] Variable rate is based on an underlying index plus a margin.

[2] Interest rate swap agreements have been entered into with respect to these issuances. See Note 2.

[3] See Note 10 - Spain Solar Projects for discussion of a default on the senior secured limited-recourse loan.

[4] Variable rate is based on the greater of an underlying index or a floor, plus a margin.