Business Combinations - Schedule of the Fair Value of Consideration Transferred as of Acquisition Date (Parenthetical) (Detail) - SolarCity [Member] - Common Stock [Member]	Nov. 21, 2016 $ / shares shares
Business Acquisition [Line Items]
Shares issued to acquire SolarCity Corporation \| shares	11,124,497
Price per share \| $ / shares	$ 185.04

Number of shares of equity interests issued or issuable to acquire entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Name:	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration