Balance Sheet Components - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Balance Sheet Components [Line Items]
Inventory write-downs	$ 15,609,000	$ 8,918,000	$ 4,929,000
Interest expense capitalized	12,800,000	3,500,000
Property, plant and equipment, net	1,829,267,000	738,494,000
Accrued Liabilities	268,884,000	108,252,000
Other long-term liabilities	173,244,000	58,197,000
Depreciation and amortization expense	155,900,000	83,900,000	25,300,000
Total property and equipment assets under capital lease	33,400,000	23,300,000
Accumulated depreciation related to assets under capital lease	12,800,000	5,000,000
Build To Suit Arrangements [Member]
Balance Sheet Components [Line Items]
Property, plant and equipment, net	52,400,000
Accrued Liabilities	21,030,000
Other long-term liabilities	31,400,000
Gigafactory [Member]
Balance Sheet Components [Line Items]
Costs related to construction activities	$ 106,600,000