Intangible Assets - Summary of Acquired Intangible Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Acquired Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	$ 450	$ 456
Finite-lived intangible assets, Accumulated Amortization	(187)	(162)
Finite-lived intangible assets, Other	5	4
Finite-lived intangible assets, Net Carrying Amount	268	298
Indefinite-lived intangible assets, Net Carrying Amount	1,310
Intangible Assets, Gross Carrying Amount	465	471
Intangible assets, Other	5	4
Intangible Assets, Net Carrying Amount	283	313
Gigafactory Nevada Water Rights [Member]
Acquired Intangible Assets [Line Items]
Indefinite-lived intangible assets, Gross Carrying Amount	15	15
Indefinite-lived intangible assets, Net Carrying Amount	15	15
Developed Technology [Member]
Acquired Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	299	302
Finite-lived intangible assets, Accumulated Amortization	(131)	(111)
Finite-lived intangible assets, Other	4	3
Finite-lived intangible assets, Net Carrying Amount	172	194
Trade names [Member]
Acquired Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	2	3
Finite-lived intangible assets, Accumulated Amortization	(1)	(1)
Finite-lived intangible assets, Net Carrying Amount	1	2
Favorable Contracts and Leases, Net [Member]
Acquired Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	113	113
Finite-lived intangible assets, Accumulated Amortization	(36)	(32)
Finite-lived intangible assets, Net Carrying Amount	77	81
Other [Member]
Acquired Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	36	38
Finite-lived intangible assets, Accumulated Amortization	(19)	(18)
Finite-lived intangible assets, Other	1	1
Finite-lived intangible assets, Net Carrying Amount	$ 18	$ 21