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Equity Incentive Plans - Additional Information (Detail)	1 Months Ended			9 Months Ended	12 Months Ended
	Mar. 31, 2018 USD ($) Tranches milestone shares	Dec. 31, 2014 Tranches shares	Aug. 31, 2012 Tranches shares	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) Tranches milestone Vehicle $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Contractual term of stock options, in years					10 years
Aggregate intrinsic value of options exercised					$ 237,000,000	$ 293,000,000	$ 544,000,000
Unrecognized compensation expense					$ 1,570,000,000
Weighted-average period of recognition of unrecognized compensation, in years					2 years 10 months 28 days
Stock-based compensation					$ 898,000,000	$ 749,000,000	$ 467,000,000
Aggregate number of vehicle production \| Vehicle					300,000
Income tax benefit from stock option exercises					$ 0
Percentage of payroll deductions of employees eligible compensation					15.00%
Percentage of discount on purchase price of shares lower than fair market value					85.00%
Number of shares issued under ESPP \| shares					500,000	400,000	400,000
Number of shares issued under ESPP, value					$ 40,000,000	$ 109,000,000	$ 71,000,000
Employee Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for issuance under ESPP \| shares					7,000,000
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
2010 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock options grant \| shares					0
2019 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock options grant \| shares					1,473,000
Shares were reserved for issuance \| shares					11,000,000
RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average grant date fair value \| $ / shares					$ 282.74	$ 316.46	$ 308.71
Aggregate fair value					$ 502,000,000	$ 546,000,000	$ 491,000,000
RSUs [Member] \| 2019 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average grant date fair value \| $ / shares					$ 282.74
2018 CEO Performance Award [Member] \| Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock options grant \| shares	20,264,042
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
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				$ 175,000,000	$ 296,000,000
2018 CEO Performance Award [Member] \| Chief Executive Officer [Member] \| Operational Milestones Probable of Being Achieved [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Operational milestones based on total revenue					35,000,000,000.0
Operational milestone based on adjusted EBITDA two					3,000,000,000.0
Unrecognized compensation expense					$ 527,000,000
Weighted-average period of recognition of unrecognized compensation, in years					2 years 8 months 19 days
2018 CEO Performance Award [Member] \| Chief Executive Officer [Member] \| Operational Milestones Not Considered Probable Achievement [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense					$ 1,290,000,000
2018 CEO Performance Award [Member] \| Chief Executive Officer [Member] \| First Tranche Milestone [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Market capitalization	$ 100,000,000,000
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
Stock-based compensation					0	$ 0	7,000,000
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					5,000,000
2012 CEO Performance Award [Member] \| Chief Executive Officer [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
Stock-based compensation					0		$ 5,000,000
Initial market capitalization					3,200,000,000
2012 CEO Performance Award [Member] \| Chief Executive Officer [Member] \| Performance Condition Not Considered Probable Achievement [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense					$ 6,000,000
Maximum [Member] \| Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period, in years					4 years
Maximum [Member] \| RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period, in years					4 years