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Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation Of Revenue [Line Items] |  |  |  |
Leasing revenues | $ 208,362 | $ 239,816 | $ 423,482 | $ 413,252
Total revenues | 6,349,676 | 4,002,231 | 10,891,140 | 7,410,982
Services and Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues from sales and services | 605,079 | 270,142 | 1,098,021 | 533,554
Sales and Services [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues from sales and services | 5,998,871 | 3,622,609 | 10,212,654 | 6,745,797
Automotive [Member] | Automotive Sales without Resale Value Guarantee [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues from sales and services | 4,918,301 | 2,698,239 | 8,601,682 | 4,880,753
Automotive [Member] | Automotive Sales with Resale Value Guarantee [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues from sales and services | 138,507 | 365,616 | (252,114) | 664,654
Automotive [Member] | Automotive Regulatory Credits [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues from sales and services | 111,219 | 54,010 | 327,200 | 134,339
Automotive [Member] | Automotive Leasing [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Leasing revenues | 208,362 | 239,816 | 423,482 | 413,252
Energy Generation and Storage [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues | 368,208 | 374,408 | 692,869 | 784,430
Energy Generation and Storage [Member] | Energy Generation and Storage Sales [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues from sales and services | 225,765 | 234,602 | 437,865 | 532,497
Energy Generation and Storage [Member] | Energy Generation and Storage Leasing [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Leasing revenues | $ 142,443 | $ 139,806 | $ 255,004 | $ 251,933

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