Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Summary Of Significant Accounting Policies [Line Items]
Unbilled transaction price allocated to performance obligations, expected of more than one year	$ 10,380
Guarantees carrying value	2,460		$ 1,450
Accounts receivable, net	3,838		4,418
MyPower customer notes receivable, net of allowance for credit losses	242		248
Allowance for credit losses	33		33
Government Rebates Receivables
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable, net	217		315
Automotive sales
Summary Of Significant Accounting Policies [Line Items]
Deferred revenue	3,750		3,600
Revenue recognized	428	$ 482
Financing receivable, Net	236		247
Automotive sales | Other non-current assets
Summary Of Significant Accounting Policies [Line Items]
Financing receivable, Net	670		821
Automotive sales | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-07-01
Summary Of Significant Accounting Policies [Line Items]
Unbilled transaction price allocated to performance obligations, expected of more than one year	$ 831
Deferred revenue, expected to recognize period	12 months
Automotive regulatory credits
Summary Of Significant Accounting Policies [Line Items]
Unbilled transaction price allocated to performance obligations, expected of more than one year	$ 3,470
Decrease in remaining performance obligation	1,110
Automotive regulatory credits | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-07-01
Summary Of Significant Accounting Policies [Line Items]
Unbilled transaction price allocated to performance obligations, expected of more than one year	$ 880
Deferred revenue, expected to recognize period	12 months
Energy generation and storage segment
Summary Of Significant Accounting Policies [Line Items]
Deferred revenue	$ 2,100		1,770
Revenue recognized	944	$ 873
Financing receivable, Net	35		34
Energy generation and storage segment | Other non-current assets
Summary Of Significant Accounting Policies [Line Items]
Financing receivable, Net	684		$ 658
Energy generation and storage segment | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-07-01
Summary Of Significant Accounting Policies [Line Items]
Unbilled transaction price allocated to performance obligations, expected of more than one year	$ 5,470
Deferred revenue, expected to recognize period	12 months