Stock Based Awards and Other Equity Instruments - Summary of RSU Activity (Details) - Restricted Stock Units $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
RSUs outstanding
Unvested outstanding, Beginning balance | shares	5,786,000
Restricted stock units, Granted | shares	7,059,000	[1]
Unvested RSUs, Vested and released | shares	(3,086,000)	[2]
Unvested RSUs, Cancelled | shares	(1,187,000)
Unvested outstanding, Ending balance | shares	8,572,000	[3]
Weighted Average Grant-Date Fair Value Per Share
Unvested outstanding, Weighted Average Grant-Date Fair Value Per Share, Beginning balance | $ / shares	$ 36.82
Weighted Average Grant-Date Fair Value Per Share, Granted | $ / shares	25.42	[1]
Weighted Average Grant-Date Fair Value Per Share, Vested and released | $ / shares	35.60	[2]
Weighted Average Grant-Date Fair Value Per Share, Cancelled | $ / shares	32.96
Unvested outstanding, Weighted Average Grant-Date Fair Value Per Share, Ending balance | $ / shares	$ 28.41	[3]
Aggregate Intrinsic Value
Unvested RSUs outstanding, Aggregate Intrinsic Value | $	$ 154	[3]

[1] Inclusive of approximately 258,000 RSUs awarded to our CEO during July 2022. The estimated grant-date fair value per RSU, based on the quoted price of our common stock on the date of grant, was $18.47. This service-based RSU award shall vest over four years, with 25% vesting on July 1, 2023 and 6.25% of the remaining award vesting in equal quarterly installments commencing thereafter, subject to the CEO’s continuous employment with the Company. The estimated grant-date fair value of this award will be amortized on a straight-line basis over the requisite service period through July 1, 2026.

[2] Inclusive of approximately 820,000 RSUs for the year ended December 31, 2022, withheld due to net share settlement to satisfy required employee tax withholding requirements. Potential shares which had been convertible under RSUs that were withheld under net share settlement remain in the authorized but unissued pool under the 2018 Plan and can be reissued by the Company. Total payments for the employees’ tax obligations to the taxing authorities due to net share settlements are reflected as a financing activity within the consolidated statements of cash flows.

[3] The Company accounts for forfeitures as they occur, rather than estimate expected forfeitures as allowed under GAAP and therefore do not include a forfeiture rate in our vested and expected to vest calculation unless necessary for a performance condition award.