Equity Incentive Plans - Summary of Stock-Based Compensation Expense (Detail) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
|
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
| Stock-based compensation expense | $ 211 | $ 208 |
| Cost of revenues [Member] | ||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
| Stock-based compensation expense | 33 | 27 |
| Research and development [Member] | ||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
| Stock-based compensation expense | 65 | 72 |
| Selling, general and administrative [Member] | ||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
| Stock-based compensation expense | $ 113 | 107 |
| Restructuring and other [Member] | ||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
| Stock-based compensation expense | $ 2 | |