Stock-Based Compensation - Additional Information (Details)	1 Months Ended		12 Months Ended
	Jul. 31, 2015 shares	Mar. 31, 2015 shares	Dec. 31, 2024 USD ($) purchase_period $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance (in shares)			38,345,000	44,753,000
Weighted-average grant-date fair value of stock options granted (in usd per share) | $ / shares			$ 0.00	$ 0.00	$ 17.21
Total intrinsic value of options exercised | $			$ 4,500,000	$ 10,300,000	$ 30,800,000
Total fair value of options vested | $			$ 6,500,000	$ 11,800,000	$ 16,700,000
Warrants issued (in shares)			846,943
Number of warrants exercised (in shares)			13,939	63,742	346,269
Compensation expense recognized | $			$ 112,825,000	$ 111,781,000	$ 110,633,000
Stock-based compensation expense capitalized | $			9,900,000	11,300,000
Total unrecognized compensation cost | $			$ 150,600,000	146,500,000
Weighted-average period of recognition			2 years 6 months
Annual contribution limit | $			$ 23,000
Defined contribution expense | $			$ 21,100,000	$ 22,700,000	21,500,000
Outstanding stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance (in shares)			3,507,000	4,243,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance (in shares)			12,375,000	8,449,000
Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant, exercise price (in dollars per share) | $ / shares			$ 0.01
Compensation expense recognized | $			$ 0	$ 4,300,000	$ 4,300,000
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional common stock shares reserved for issuance (in shares)		3,000,000
Shares of common stock reserved for issuance (in shares)		4,500,000
2013 Equity Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance (in shares)		8,044,829
2015 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance (in shares)	11,400,000
Minimum annual automatic increase included in common stock reserved for future issuance as of first day of each fiscal year (in shares)	10,000,000
Minimum percentage of annual automatic increase included in common stock reserved for future issuance as of last day of immediately preceding fiscal year	4.00%
2015 Equity Incentive Plan | Outstanding stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
2015 Equity Incentive Plan | Outstanding stock options | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Vesting award percentage	25.00%
2015 Equity Incentive Plan | Outstanding stock options | Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Vesting award percentage	75.00%
2015 Equity Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
2015 Equity Incentive Plan | Restricted Stock Units (RSUs) | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Vesting award percentage	25.00%
2015 Equity Incentive Plan | Restricted Stock Units (RSUs) | Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Vesting award percentage	75.00%
2015 Equity Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance (in shares)	15,439,334
2015 Equity Incentive Plan | Maximum | Outstanding stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, expiration period	10 years
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance (in shares)			1,000,000
Minimum percentage of annual automatic increase included in common stock reserved for future issuance as of last day of immediately preceding fiscal year			2.00%
Offering period			24 months
Number of purchase periods | purchase_period			4
Purchase period			6 months
Maximum percentage in payroll deductions to acquire shares of common stock			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
Maximum annual shares reserved for issuance (in shares)			5,000,000
Sunrun 401 (k) | First threshold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer matching contribution, percentage			100.00%
Percent of pay matched			1.00%
Sunrun 401 (k) | Second threshold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer matching contribution, percentage			50.00%
Percent of pay matched			5.00%
Vivint Solar 401 (k)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer matching contribution, percentage			33.00%
Percent of pay matched			6.00%
Long-term Incentive Plan 2013 | Restricted Stock Units (RSUs) | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting award percentage			33.33%
Long-term Incentive Plan 2013 | Restricted Stock Units (RSUs) | Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting award percentage			33.33%
Long-term Incentive Plan 2013 | Restricted Stock Units (RSUs) | Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting award percentage			33.33%