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Equity Incentive Plans - Additional Information (Detail) | 1 Months Ended | 3 Months Ended | 6 Months Ended
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Mar. 31, 2018 USD ($) Tranches milestone $ / shares shares | Dec. 31, 2014 Tranches shares | Aug. 31, 2012 Tranches shares | Jun. 30, 2019 USD ($) milestone shares | Mar. 31, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) Tranches milestone Vehicle shares | Jun. 30, 2018 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Contractual term of stock options, in years |  |  |  |  |  |  | 10 years |
Number of stock options grant | shares |  |  |  |  |  |  | 0 |
Unrecognized compensation expense |  |  |  | $ 1,600,000,000 |  |  | $ 1,600,000,000 |
Weighted-average period of recognition of unrecognized compensation, in years |  |  |  |  |  |  | 3 years |
Stock-based compensation |  |  |  |  |  |  | $ 418,241,000 | $ 338,983,000
Aggregate number of vehicle production | Vehicle |  |  |  |  |  |  | 300,000 |
Income tax benefit from stock option exercises |  |  |  |  |  |  | $ 0 |
Upon Completion of First Model X Production Vehicle [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Portion of stock options scheduled to vest upon successful completion of performance objectives |  |  |  |  |  |  | 25.00% |
Upon Achieving Aggregate Production of 100,000 Vehicles in Trailing 12-month Period [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Portion of stock options scheduled to vest upon successful completion of performance objectives |  |  |  |  |  |  | 25.00% |
Aggregate number of vehicle production | Vehicle |  |  |  |  |  |  | 100,000 |
Upon Completion of First Gen III Production Vehicle [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Portion of stock options scheduled to vest upon successful completion of performance objectives |  |  |  |  |  |  | 25.00% |
Annualized Gross Margin of Greater Than 30% for Any Three Year Period [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Portion of stock options scheduled to vest upon successful completion of performance objectives |  |  |  |  |  |  | 25.00% |
Gross margin |  |  |  |  |  |  | 30.00% |
Fourth Tranche [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate number of vehicle production | Vehicle |  |  |  |  |  |  | 100,000 |
Third Tranche [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate number of vehicle production | Vehicle |  |  |  |  |  |  | 200,000 |
2014 Performance-based Stock Option Grants [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock options grant | shares |  | 1,073,000 |  |  |  |  |  |
Number of vesting tranches | Tranches |  | 4 |  |  |  |  |  |
2014 Performance-based Stock Option Grants [Member] | Performance Condition Not Considered Probable Achievement [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation expense |  |  |  |  | $ 9,900,000 |  |  |
Stock-based compensation |  |  |  | $ 0 |  | $ 0 | $ 0 | 0
Chief Executive Officer [Member] | 2018 CEO Performance Award [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock options grant | shares | 20,264,042 |  |  |  |  |  |  |
Stock option awards exercise price | $ / shares | $ 350.02 |  |  |  |  |  |  |
Number of vesting tranches CEO Performance Award consists | Tranches | 12 |  |  |  |  |  |  |
Increase to market capitalization for each remaining milestone | $ 50,000,000,000 |  |  |  |  |  |  |
Number of operational milestones focused on revenue | milestone | 8 |  |  |  |  |  |  |
Number of operational milestones focused on adjusted EBITDA | milestone | 8 |  |  |  |  |  |  |
Award vesting description |  |  |  |  |  |  | Each of the 12 vesting tranches of the 2018 CEO Performance Award will vest upon certification by the Board of Directors that both (i) the market capitalization milestone for such tranche, which begins at $100 billion for the first tranche and increases by increments of $50 billion thereafter, and (ii) any one of the following eight operational milestones focused on revenue or eight operational milestones focused on Adjusted EBITDA have been met for the previous four consecutive fiscal quarters on an annualized basis. |
Number of operational milestones achieved | milestone |  |  |  | 2 |  |  | 2 |
Operational milestones based on total revenue |  |  |  |  |  |  | $ 20,000,000,000.0 |
Operational milestone based on adjusted EBITDA one |  |  |  |  |  |  | 1,500,000,000 |
Operational milestone based on adjusted EBITDA two |  |  |  |  |  |  | $ 3,000,000,000.0 |
Number of vesting tranches | Tranches |  |  |  |  |  |  | 0 |
Stock-based compensation |  |  |  | $ 55,600,000 |  | 55,700,000 | $ 110,700,000 | 62,400,000
Chief Executive Officer [Member] | 2018 CEO Performance Award [Member] | Operational Milestones Probable of Being Achieved [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Operational milestone based on adjusted EBITDA two |  |  |  |  |  |  | 3,000,000,000.0 |
Chief Executive Officer [Member] | 2018 CEO Performance Award [Member] | Operational Milestones Achieved but not Vested or Probable of Being Achieved [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation expense |  |  |  | 487,400,000 |  |  | 487,400,000 |
Weighted-average period of recognition of unrecognized compensation, in years |  |  |  |  | 2 years 8 months 12 days |  |  |
Chief Executive Officer [Member] | 2018 CEO Performance Award [Member] | Operational Milestones Not Considered Probable Achievement [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation expense |  |  |  | 1,500,000,000 |  |  | 1,500,000,000 |
Chief Executive Officer [Member] | 2018 CEO Performance Award [Member] | First Tranche Milestone [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Market capitalization | $ 100,000,000,000 |  |  |  |  |  |  |
Chief Executive Officer [Member] | 2012 CEO Performance Award [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock options grant | shares |  |  | 5,274,901 |  |  |  |  |
Number of vesting tranches CEO Performance Award consists | Tranches |  |  | 10 |  |  |  |  |
Market capitalization |  |  |  | 4,000,000,000.00 |  |  | 4,000,000,000.00 |
Stock-based compensation |  |  |  | 0 |  | $ 0 | 0 | $ 100,000
Initial market capitalization |  |  |  | $ 3,200,000,000 |  |  | $ 3,200,000,000 |
Chief Executive Officer [Member] | 2012 CEO Performance Award [Member] | Performance Condition Not Considered Probable Achievement [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation expense |  |  |  |  | $ 5,700,000 |  |  |
2010 Equity Incentive Plan [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares were reserved for issuance | shares |  |  |  | 12,260,875 |  |  | 12,260,875 |
Maximum [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period, in years |  |  |  |  |  |  | 4 years |

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