Percentage of voting equity interests acquired at the acquisition date in the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Summary of Significant Accounting and Reporting Policies - Noncontrolling Interest (Details)	Dec. 31, 2015	Oct. 01, 2015	Sep. 21, 2015	May. 12, 2015	Dec. 31, 2014
Noncontrolling Interest [Line Items]
Noncontrolling interest, percent ownership by noncontrolling owners			22.60%	22.20%
NEP OpCo [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interest, percent ownership	23.20%				20.10%
Noncontrolling interest, percent ownership by noncontrolling owners	76.80%				79.90%
Non Affiliated Party [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interest, percent ownership by noncontrolling owners	10.00%
NET Holdings Management, LLC [Member] \| Subsidiary of NEP [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interest, percent ownership		10.00%
Percentage of interest acquired	90.00%	100.00%