Convertible and Long-term Debt Obligations - Solar Loan-backed Notes - Additional Information (Detail) - SolarCity [Member] - Non-recourse debt [Member] - Solar Loan-backed Notes, Series 2017-A $ in Millions	Jan. 27, 2017 USD ($)
Class A [Member]
Debt Instrument [Line Items]
Debt principal issued	$ 123.0
Debt discount percentage	1.87%
Class B [Member]
Debt Instrument [Line Items]
Debt principal issued	$ 8.8
Debt discount percentage	1.86%
Class C [Member]
Debt Instrument [Line Items]
Debt principal issued	$ 13.2
Debt discount percentage	8.13%