Debt (Details) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 NextEra Energy Resources subsidiary [Member] Revolving Credit Facility [Member] Canadian revolving credit agreements [Member] USD ($)	Mar. 31, 2015 NextEra Energy Resources subsidiary [Member] Revolving Credit Facility [Member] NEPOpCo Senior Secured Revolving Credit Facility [Member] USD ($)	Mar. 31, 2015 NextEra Energy Resources subsidiary [Member] Revolving Credit Facility [Member] Limited-recourse construction and term loan facility [Member] USD ($)	Mar. 31, 2015 NextEra Energy Resources subsidiary [Member] Revolving Credit Facility [Member] Cash grant bridge loan facility [Member] USD ($)	Apr. 30, 2015 Subsequent Event [Member] NextEra Energy Resources Subsidiary 1 [Member] Canadian senior secured limited-recourse term loan [Member] USD ($)	Apr. 30, 2015 Subsequent Event [Member] NextEra Energy Resources Subsidiary 1 [Member] Canadian senior secured limited-recourse term loan [Member] CAD	Apr. 30, 2015 Subsequent Event [Member] NextEra Energy Resources Subsidiary 2 [Member] Canadian senior secured limited-recourse term loan [Member] USD ($)	Apr. 30, 2015 Subsequent Event [Member] NextEra Energy Resources Subsidiary 2 [Member] Canadian senior secured limited-recourse term loan [Member] CAD	Apr. 30, 2015 Subsequent Event [Member] Capital Holdings [Member] Term Loans [Member] USD ($) loan_agreement
Debt Instrument [Line Items]
Interest Rate Terms	Variable	Variable	Variable	Variable
Proceeds from Issuance of Debt	$ 20	$ 122	$ 23	$ 29
Debt Instrument, Face Amount					$ 324	392	$ 228	275	$ 450
Debt Instrument, number of debt agreements									2