Stock-Based Compensation - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense capitalized	$ 2,200,000	$ 2,400,000	$ 7,000,000.0	$ 7,500,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, offering period			24 months
Share-based compensation arrangement by share-based payment award, purchase period			6 months
Maximum percentage in payroll deductions to acquire shares of common stock	15.00%		15.00%
Maximum deductible fair market value of shares available for employee to purchase per calendar year			$ 25,000
Maximum number of shares available for employee to purchase per offering period (in shares)			10,000

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.

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+ Details

Sunrun Inc. 10-Q