Cash Equivalents and Investments - Schedule of Cash Equivalents and Short and Long-Term Investments (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 3,010,141
Gross Unrealized Gains	108
Gross Unrealized Losses	(16,551)
Fair Value	2,993,988
Cash Equivalents	458,435
Short-Term Investments	1,576,293
Long-Term Investments	959,260
Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	3,010,141
Gross Unrealized Gains	108
Gross Unrealized Losses	(16,551)
Fair Value	2,993,698
Cash Equivalents	458,435
Short-Term Investments	1,576,003
Long-Term Investments	959,260
Level 1 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	2,122,079	$ 1,903,880
Gross Unrealized Gains	19	0
Gross Unrealized Losses	(10,181)	0
Fair Value	2,111,917	1,903,880
Cash Equivalents	458,435	1,903,880
Short-Term Investments	1,135,234	0
Long-Term Investments	518,248	0
Level 1 | Equity Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	290
Cash Equivalents	0
Short-Term Investments	290
Long-Term Investments	0
Level 2 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	888,062
Gross Unrealized Gains	89
Gross Unrealized Losses	(6,370)
Fair Value	881,781
Cash Equivalents	0
Short-Term Investments	440,769
Long-Term Investments	441,012
Money market funds | Level 1 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	458,435	1,903,880
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	458,435	1,903,880
Cash Equivalents	458,435	1,903,880
Short-Term Investments	0	0
Long-Term Investments	0	$ 0
U.S. Treasury securities | Level 1 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	1,663,644
Gross Unrealized Gains	19
Gross Unrealized Losses	(10,181)
Fair Value	1,653,482
Cash Equivalents	0
Short-Term Investments	1,135,234
Long-Term Investments	518,248
U.S. agency securities | Level 2 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	304,154
Gross Unrealized Gains	6
Gross Unrealized Losses	(623)
Fair Value	303,537
Cash Equivalents	0
Short-Term Investments	209,384
Long-Term Investments	94,153
Foreign government securities | Level 2 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	14,274
Gross Unrealized Gains	67
Gross Unrealized Losses	(161)
Fair Value	14,180
Cash Equivalents	0
Short-Term Investments	0
Long-Term Investments	14,180
Commercial paper | Level 2 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	178,314
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	178,314
Cash Equivalents	0
Short-Term Investments	178,314
Long-Term Investments	0
Corporate debt securities | Level 2 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	391,320
Gross Unrealized Gains	16
Gross Unrealized Losses	(5,586)
Fair Value	385,750
Cash Equivalents	0
Short-Term Investments	53,071
Long-Term Investments	332,679
Mutual funds | Level 1 | Equity Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	290
Cash Equivalents	0
Short-Term Investments	290
Long-Term Investments	$ 0