XML 25 R42.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Value of Financial Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Estimated fair value of notes $ 1,220.0us-gaap_LongTermDebtFairValue $ 914.9us-gaap_LongTermDebtFairValue
Par value of convertible senior notes 659.8us-gaap_DebtInstrumentFaceAmount 660.0us-gaap_DebtInstrumentFaceAmount
2019 Notes [Member]    
Debt Instrument [Line Items]    
Estimated fair value of notes 852.2us-gaap_LongTermDebtFairValue
/ us-gaap_DebtInstrumentAxis
= tsla_TwoThousandNineteenSeniorNotesMember		  
Par value of convertible senior notes 920.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= tsla_TwoThousandNineteenSeniorNotesMember		  
2021 Notes [Member]    
Debt Instrument [Line Items]    
Estimated fair value of notes 1,250.0us-gaap_LongTermDebtFairValue
/ us-gaap_DebtInstrumentAxis
= tsla_TwoThousandTwentyOneSeniorNotesMember		  
Par value of convertible senior notes $ 1,380.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= tsla_TwoThousandTwentyOneSeniorNotesMember