Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]
Revenue due to changes in regulation				$ 288
Remaining performance obligation, amount	$ 1,910		$ 1,910
Allowance for credit losses	37		37		$ 37
Unrecognized tax benefits	1,040		1,040		870
Unrecognized tax benefits, that would not affect effective tax rate	616		616		572
Other non-current assets	5,497		5,497		4,193
Customer notes receivable, net of allowance for credit losses	268		268		280
Customer notes receivable, net of allowance for credit losses, current	6		6		7
Gross cost of operating lease vehicles	7,400		7,400		6,080
Net accumulated depreciation related to leased vehicles	1,280		1,280		1,040
Goodwill	250		250		194
Automotive sales
Summary Of Significant Accounting Policies [Line Items]
Deferred revenue	3,270		3,270		2,910
Financing receivable, Net	239		239		128
Revenue recognized			360	169
Automotive leasing
Summary Of Significant Accounting Policies [Line Items]
Sales-type leasing revenue	20	$ 161	197	559
Sales-type leasing cost of revenue	16	$ 97	149	343
Energy generation and storage segment
Summary Of Significant Accounting Policies [Line Items]
Deferred revenue	1,050		1,050		863
Financing receivable, Net	$ 29		29		24
Revenue recognized			$ 511	$ 132
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-10-01 | Automotive sales
Summary Of Significant Accounting Policies [Line Items]
Remaining performance obligation, expected timing of satisfaction, period	12 months		12 months
Remaining performance obligation, amount	$ 815		$ 815
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-10-01 | Energy generation and storage segment
Summary Of Significant Accounting Policies [Line Items]
Remaining performance obligation, expected timing of satisfaction, period	12 months		12 months
Remaining performance obligation, amount	$ 709		$ 709
Other non-current assets | Automotive sales
Summary Of Significant Accounting Policies [Line Items]
Financing receivable, Net	1,110		1,110		665
Other non-current assets | Energy generation and storage segment
Summary Of Significant Accounting Policies [Line Items]
Financing receivable, Net	541		541		387
Government Rebates Receivables
Summary Of Significant Accounting Policies [Line Items]
Other non-current assets	328		328		753
Automotive segment
Summary Of Significant Accounting Policies [Line Items]
Goodwill, increase during the period			56
Goodwill	$ 250		$ 250		$ 194