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.

No definition available.

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The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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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).

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Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Leasing revenues									$ 1,052	$ 869	$ 883
Total revenues	$ 10,744	$ 8,771	$ 6,036	$ 5,985	$ 7,384	$ 6,303	$ 6,350	$ 4,541	31,536	24,578	21,461
Automotive Regulatory Credits [Member]
Disaggregation Of Revenue [Line Items]
Total revenues from sales and services									1,580	594	419
Services and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenues from sales and services									2,306	2,226	1,391
Sales and Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenues from sales and services									29,967	23,178	20,079
Automotive [Member] \| Automotive Sales without Resale Value Guarantee [Member]
Disaggregation Of Revenue [Line Items]
Total revenues from sales and services									24,053	19,212	15,810
Automotive [Member] \| Automotive Sales with Resale Value Guarantee [Member]
Disaggregation Of Revenue [Line Items]
Total revenues from sales and services									551	146	1,403
Automotive [Member] \| Automotive Regulatory Credits [Member]
Disaggregation Of Revenue [Line Items]
Total revenues from sales and services									1,580	594	419
Automotive [Member] \| Automotive Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues									1,052	869	883
Energy Generation and Storage [Member]
Disaggregation Of Revenue [Line Items]
Total revenues									1,994	1,531	1,555
Energy Generation and Storage [Member] \| Energy Generation and Storage Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenues from sales and services									1,477	1,000	1,056
Energy Generation and Storage [Member] \| Energy Generation and Storage Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues									$ 517	$ 531	$ 499