Fair Value Measurements - Summary of Financial Instruments Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets	$ 717,091	$ 2,123,511
Money market funds | Cash and cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets	717,091	1,070,979
Money market funds | Restricted cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets		1,050,000
Marketable equity securities | Prepaid expenses and other current assets
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets		2,532
Level 1
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets	717,091	2,123,511
Level 1 | Money market funds | Cash and cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets	717,091	1,070,979
Level 1 | Money market funds | Restricted cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets		1,050,000
Level 1 | Marketable equity securities | Prepaid expenses and other current assets
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets		2,532
Level 2
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets	0	0
Level 2 | Money market funds | Cash and cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets	0	0
Level 2 | Money market funds | Restricted cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets		0
Level 2 | Marketable equity securities | Prepaid expenses and other current assets
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets		0
Level 3
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets	0	0
Level 3 | Money market funds | Cash and cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets	$ 0	0
Level 3 | Money market funds | Restricted cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets		0
Level 3 | Marketable equity securities | Prepaid expenses and other current assets
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial Assets		$ 0