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Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
 [2]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Balance, beginning of period $ (49) $ (30) $ (44) $ (16)  
Other comprehensive loss before reclassification (19) (9) (27) (25)  
Amounts reclassified from AOCI to interest expense 1 1 4 3  
Net other comprehensive loss (18) (8) [1] (23) (22) [1]  
Balance, end of period (67) (32) (67) (32)  
Balance sheet adjustment related to transitioning from separate return method (see Note 3)   6   6  
AOCI attributable to noncontrolling interest (60) (31) (60) (31)  
AOCI attributable to NextEra Energy Partners (7) (1) (7) (1) $ (3)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]          
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Balance, beginning of period 0 (2) (5) 9  
Other comprehensive loss before reclassification (11) (2) (9) (15)  
Amounts reclassified from AOCI to interest expense 1 1 4 3  
Net other comprehensive loss (10) (1) (5) (12)  
Balance, end of period (10) 3 (10) 3  
Balance sheet adjustment related to transitioning from separate return method (see Note 3)   6   6  
AOCI attributable to noncontrolling interest (9) 3 (9) 3  
AOCI attributable to NextEra Energy Partners (1) 0 (1) 0  
Net Unrealized Gains (Losses) on Foreign Currency Translation [Member]          
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Balance, beginning of period (49) (28) (39) (25)  
Other comprehensive loss before reclassification (8) (7) (18) (10)  
Amounts reclassified from AOCI to interest expense 0 0 0 0  
Net other comprehensive loss (8) (7) (18) (10)  
Balance, end of period (57) (35) (57) (35)  
Balance sheet adjustment related to transitioning from separate return method (see Note 3)   0   0  
AOCI attributable to noncontrolling interest (51) (34) (51) (34)  
AOCI attributable to NextEra Energy Partners $ (6) $ (1) $ (6) $ (1)  
[1] Prior-period financial information has been retrospectively adjusted as discussed in Note 2.
[2] Prior-period financial information has been retrospectively adjusted as discussed in Note 2.