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Segment Reporting and Information about Geographic Areas - Schedule of Total Revenues and Gross Margin by Reportable Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |
Revenues | $ 6,349,676 | $ 4,002,231 | $ 10,891,140 | $ 7,410,982
Gross profit | 921,046 | 618,930 | 1,486,789 | 1,075,456
Automotive Segment [Member] |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |
Revenues | 5,981,468 | 3,627,823 | 10,198,271 | 6,626,552
Gross profit | 878,361 | 574,795 | 1,436,330 | 996,662
Energy Generation and Storage [Member] |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |
Revenues | 368,208 | 374,408 | 692,869 | 784,430
Gross profit | $ 42,685 | $ 44,135 | $ 50,459 | $ 78,794

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