Fair Value Measurement and Financial Instruments - Schedule of Fair Value Hierarchy for Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Corporate debt securities
Assets
Marketable securities	$ 788,396	$ 914,791
Corporate debt securities \| Other Assets, Noncurrent
Assets
Marketable securities	10,511	10,451
Mortgage-backed and asset-backed securities
Assets
Marketable securities	31,675	34,036
Mortgage-backed and asset-backed securities \| Other Assets, Noncurrent
Assets
Marketable securities	0	0
Certificates of deposit
Assets
Cash equivalents	533,669	395,351
Certificates of deposit \| Other Assets, Noncurrent
Assets
Cash equivalents	0	0
Fair value, recurring
Assets
Cash equivalents	2,847,074	2,159,699
Marketable securities	2,435,661	2,255,038
Total assets at fair value	6,626,375	4,917,425
Liabilities
Total liabilities at fair value	24,452	10,280
Fair value, recurring \| Foreign exchange
Liabilities
Derivative liabilities	24,452	10,280
Fair value, recurring \| Prepaids and other current assets \| Foreign exchange
Assets
Other assets	16,129	25,918
Fair value, recurring \| Certificates of deposit
Assets
Marketable securities	472,750	364,234
Fair value, recurring \| U.S. government and government agency debt securities
Assets
Marketable securities	350,450	863
Funds receivable and amounts held on behalf of customers	113,981
Fair value, recurring \| Commercial paper
Assets
Marketable securities	838,815	993,004
Fair value, recurring \| Corporate debt securities
Assets
Marketable securities	741,971	862,901
Fair value, recurring \| Corporate debt securities \| Other Assets, Noncurrent
Assets
Other assets	10,511	10,451
Fair value, recurring \| Mortgage-backed and asset-backed securities
Assets
Marketable securities	31,675	34,036
Fair value, recurring \| Money market funds
Assets
Cash equivalents	2,484,384	1,923,184
Funds receivable and amounts held on behalf of customers	1,203,019	466,319
Fair value, recurring \| Certificates of deposit
Assets
Cash equivalents	60,919	31,117
Fair value, recurring \| Commercial paper
Assets
Cash equivalents	265,857	163,959
Fair value, recurring \| Corporate debt securities
Assets
Cash equivalents	35,914	41,439
Fair value, recurring \| Level 1
Assets
Cash equivalents	2,545,303	1,954,301
Marketable securities	472,750	364,234
Total assets at fair value	4,221,072	2,784,854
Liabilities
Total liabilities at fair value	0	0
Fair value, recurring \| Level 1 \| Foreign exchange
Liabilities
Derivative liabilities	0	0
Fair value, recurring \| Level 1 \| Prepaids and other current assets \| Foreign exchange
Assets
Other assets	0	0
Fair value, recurring \| Level 1 \| Certificates of deposit
Assets
Marketable securities	472,750	364,234
Fair value, recurring \| Level 1 \| U.S. government and government agency debt securities
Assets
Marketable securities	0	0
Funds receivable and amounts held on behalf of customers	0
Fair value, recurring \| Level 1 \| Commercial paper
Assets
Marketable securities	0	0
Fair value, recurring \| Level 1 \| Corporate debt securities
Assets
Marketable securities	0	0
Fair value, recurring \| Level 1 \| Corporate debt securities \| Other Assets, Noncurrent
Assets
Other assets	0	0
Fair value, recurring \| Level 1 \| Mortgage-backed and asset-backed securities
Assets
Marketable securities	0	0
Fair value, recurring \| Level 1 \| Money market funds
Assets
Cash equivalents	2,484,384	1,923,184
Funds receivable and amounts held on behalf of customers	1,203,019	466,319
Fair value, recurring \| Level 1 \| Certificates of deposit
Assets
Cash equivalents	60,919	31,117
Fair value, recurring \| Level 1 \| Commercial paper
Assets
Cash equivalents	0	0
Fair value, recurring \| Level 1 \| Corporate debt securities
Assets
Cash equivalents	0	0
Fair value, recurring \| Level 2
Assets
Cash equivalents	301,771	205,398
Marketable securities	1,962,911	1,890,804
Total assets at fair value	2,394,792	2,122,120
Liabilities
Total liabilities at fair value	24,452	10,280
Fair value, recurring \| Level 2 \| Foreign exchange
Liabilities
Derivative liabilities	24,452	10,280
Fair value, recurring \| Level 2 \| Prepaids and other current assets \| Foreign exchange
Assets
Other assets	16,129	25,918
Fair value, recurring \| Level 2 \| Certificates of deposit
Assets
Marketable securities	0	0
Fair value, recurring \| Level 2 \| U.S. government and government agency debt securities
Assets
Marketable securities	350,450	863
Funds receivable and amounts held on behalf of customers	113,981
Fair value, recurring \| Level 2 \| Commercial paper
Assets
Marketable securities	838,815	993,004
Fair value, recurring \| Level 2 \| Corporate debt securities
Assets
Marketable securities	741,971	862,901
Fair value, recurring \| Level 2 \| Corporate debt securities \| Other Assets, Noncurrent
Assets
Other assets	0	0
Fair value, recurring \| Level 2 \| Mortgage-backed and asset-backed securities
Assets
Marketable securities	31,675	34,036
Fair value, recurring \| Level 2 \| Money market funds
Assets
Cash equivalents	0	0
Funds receivable and amounts held on behalf of customers	0	0
Fair value, recurring \| Level 2 \| Certificates of deposit
Assets
Cash equivalents	0	0
Fair value, recurring \| Level 2 \| Commercial paper
Assets
Cash equivalents	265,857	163,959
Fair value, recurring \| Level 2 \| Corporate debt securities
Assets
Cash equivalents	35,914	41,439
Fair value, recurring \| Level 3
Assets
Cash equivalents	0	0
Marketable securities	0	0
Total assets at fair value	10,511	10,451
Liabilities
Total liabilities at fair value	0	0
Fair value, recurring \| Level 3 \| Foreign exchange
Liabilities
Derivative liabilities	0	0
Fair value, recurring \| Level 3 \| Prepaids and other current assets \| Foreign exchange
Assets
Other assets	0	0
Fair value, recurring \| Level 3 \| Certificates of deposit
Assets
Marketable securities	0	0
Fair value, recurring \| Level 3 \| U.S. government and government agency debt securities
Assets
Marketable securities	0	0
Funds receivable and amounts held on behalf of customers	0
Fair value, recurring \| Level 3 \| Commercial paper
Assets
Marketable securities	0	0
Fair value, recurring \| Level 3 \| Corporate debt securities
Assets
Marketable securities	0	0
Fair value, recurring \| Level 3 \| Corporate debt securities \| Other Assets, Noncurrent
Assets
Other assets	10,511	10,451
Fair value, recurring \| Level 3 \| Mortgage-backed and asset-backed securities
Assets
Marketable securities	0	0
Fair value, recurring \| Level 3 \| Money market funds
Assets
Cash equivalents	0	0
Funds receivable and amounts held on behalf of customers	0	0
Fair value, recurring \| Level 3 \| Certificates of deposit
Assets
Cash equivalents	0	0
Fair value, recurring \| Level 3 \| Commercial paper
Assets
Cash equivalents	0	0
Fair value, recurring \| Level 3 \| Corporate debt securities
Assets
Cash equivalents	$ 0	$ 0

Funds Held For Clients, Fair Value Disclosure

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Fair value of financial and nonfinancial obligations.

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Fair value portion of other assets.

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