Acquisitions	3 Months Ended
Mar. 31, 2018
Business Combinations [Abstract]
Acquisitions	Acquisitions During 2017, a subsidiary of NEP completed acquisitions from NEER which were transfers of assets between entities under common control that are required to be accounted for as if the transfers occurred since the inception of common control, with prior periods retrospectively adjusted to furnish comparative information. Accordingly, the accompanying condensed consolidated financial statements have been retrospectively adjusted for the three months ended March 31, 2017 to include the historical results and financial position of the common control acquisitions prior to their respective acquisition dates. In August 2017, NEP and NEP GP implemented governance changes that, among other things, enhanced NEP unitholder governance rights. The new governance structure established a NEP board of directors whereby NEP unitholders have the ability to nominate and elect board members, subject to certain limitations and requirements. As a result of these governance changes, beginning in January 2018, acquisitions from NEER will no longer be treated as common control acquisitions and NEP's financial statements will no longer be retrospectively adjusted for such acquisitions.

Acquisitions

During 2017, a subsidiary of NEP completed acquisitions from NEER which were transfers of assets between entities under common control that are required to be accounted for as if the transfers occurred since the inception of common control, with prior periods retrospectively adjusted to furnish comparative information. Accordingly, the accompanying condensed consolidated financial statements have been retrospectively adjusted for the three months ended March 31, 2017 to include the historical results and financial position of the common control acquisitions prior to their respective acquisition dates.

In August 2017, NEP and NEP GP implemented governance changes that, among other things, enhanced NEP unitholder governance rights. The new governance structure established a NEP board of directors whereby NEP unitholders have the ability to nominate and elect board members, subject to certain limitations and requirements. As a result of these governance changes, beginning in January 2018, acquisitions from NEER will no longer be treated as common control acquisitions and NEP's financial statements will no longer be retrospectively adjusted for such acquisitions.