Segment Reporting and Information about Geographic Areas - Schedule of Total Revenues and Gross Margin by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	$ 3,408,751	$ 2,696,270
Gross profit	456,526	667,946
Automotive [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	2,998,729	2,482,326
Gross profit	421,867	605,775
Energy Generation and Storage [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	410,022	213,944
Gross profit	$ 34,659	$ 62,171

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1,2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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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

No definition available.

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