Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period		$ (144)	$ (157)		$ (108)
Other comprehensive loss before reclassification		7	3		(54)
Amounts reclassified from AOCI to interest expense		5	7		5
Other comprehensive income (loss) related to equity method investee		5	3	[1]	0	[1]
Total other comprehensive income (loss), net of tax	[2]	17	13	[1]	(49)	[1]
Balance, end of period		(127)	(144)		(157)
AOCI attributable to noncontrolling interest		(128)
AOCI attributable to NextEra Energy Partners		1	(3)	[3]
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period		(4)	(11)		(4)
Other comprehensive loss before reclassification		0	0		(12)
Amounts reclassified from AOCI to interest expense		5	7		5
Other comprehensive income (loss) related to equity method investee		0	0
Total other comprehensive income (loss), net of tax		5	7		(7)
Balance, end of period		1	(4)		(11)
AOCI attributable to noncontrolling interest		(1)
AOCI attributable to NextEra Energy Partners		2
Net Unrealized Gains (Losses) on Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period		(105)	(108)		(66)
Other comprehensive loss before reclassification		7	3		(42)
Amounts reclassified from AOCI to interest expense		0	0		0
Other comprehensive income (loss) related to equity method investee		0	0
Total other comprehensive income (loss), net of tax		7	3		(42)
Balance, end of period		(98)	(105)		(108)
AOCI attributable to noncontrolling interest		(96)
AOCI attributable to NextEra Energy Partners		(2)
Other Comprehensive Income (Loss) Related to Equity Method Investee [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period		(35)	(38)		(38)
Other comprehensive loss before reclassification		0	0		0
Amounts reclassified from AOCI to interest expense		0	0		0
Other comprehensive income (loss) related to equity method investee		5	3
Total other comprehensive income (loss), net of tax		5	3		0
Balance, end of period		(30)	$ (35)		$ (38)
AOCI attributable to noncontrolling interest		(31)
AOCI attributable to NextEra Energy Partners		$ 1

[1] Prior-period financial information has been retrospectively adjusted as discussed in Note 2 - Basis of Presentation.

[2] Prior-period financial information has been retrospectively adjusted as discussed in Note 2 - Basis of Presentation.

[3] Prior-period financial information has been retrospectively adjusted as discussed in Note 2 - Basis of Presentation.