Equity Incentive Plans (Tables)

3 Months Ended

Mar. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Operational Milestone Based on Revenue or Adjusted EBITDA

Total Annualized Revenue (in billions)		Annualized Adjusted EBITDA (in billions)
$20.0		$1.5
$35.0		$3.0
$55.0		$4.5
$75.0		$6.0
$100.0		$8.0
$125.0		$10.0
$150.0		$12.0
$ 175.0		$14.0

Summary of Stock-Based Compensation Expense

The following table summarizes our stock-based compensation expense by line item in the consolidated statements of operations (in millions):

		Three Months Ended March 31,
		2020				2019
Cost of revenues		$	33			$	27
Research and development			65				72
Selling, general and administrative			113				107
Restructuring and other			—				2
Total		$	211			$	208