Other Long-Term Liabilities - Schedule of Other Long-term Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Other Liabilities, Noncurrent [Abstract]
Operating lease liabilities	$ 1,407	$ 1,254
Accrued warranty reserve	1,083	989
Sales return reserve	378	500
Deferred tax liability	63	151
Other non-current liabilities	405	436
Total other long-term liabilities	$ 3,336	$ 3,330