Fair Value Measurements and Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Assets
Short-term investments	$ 2,830
Short-term investments	2,826	$ 2,507
Corporate debt securities \| Other assets, noncurrent
Assets
Short-term investments	4	4
Fair Value, Recurring
Assets
Cash and cash equivalents	1,418	2,369
Short-term investments	2,826	2,507
Total assets at fair value	5,900	6,267
Liabilities
Total liabilities at fair value	74	60
Fair Value, Recurring \| Foreign Exchange Derivative
Liabilities
Accrued expenses, accounts payable, and other current liabilities	72	55
Other liabilities, noncurrent	2	5
Fair Value, Recurring \| Prepaids and other current assets \| Foreign Exchange Derivative
Assets
Other assets	12	27
Fair Value, Recurring \| Certificates of deposit
Assets
Short-term investments	10	172
Fair Value, Recurring \| Government bonds
Assets
Short-term investments	301	333
Fair Value, Recurring \| Commercial paper
Assets
Short-term investments	231	366
Fair Value, Recurring \| Corporate debt securities
Assets
Short-term investments	1,934	1,491
Fair Value, Recurring \| Corporate debt securities \| Other assets, noncurrent
Assets
Other assets	4	4
Fair Value, Recurring \| Mortgage-backed and asset-backed securities
Assets
Short-term investments	350	145
Fair Value, Recurring \| Money market funds
Assets
Cash and cash equivalents	1,273	2,018
Funds receivable and amounts held on behalf of customers	1,640	1,360
Fair Value, Recurring \| Certificates of deposit
Assets
Cash and cash equivalents		1
Fair Value, Recurring \| Government bonds
Assets
Cash and cash equivalents	47	115
Fair Value, Recurring \| Commercial paper
Assets
Cash and cash equivalents	75	223
Fair Value, Recurring \| Corporate debt securities
Assets
Cash and cash equivalents	23	12
Fair Value, Recurring \| Level 1
Assets
Cash and cash equivalents	1,273	2,018
Short-term investments	0	0
Total assets at fair value	2,913	3,378
Liabilities
Total liabilities at fair value	0	0
Fair Value, Recurring \| Level 1 \| Foreign Exchange Derivative
Liabilities
Accrued expenses, accounts payable, and other current liabilities	0	0
Other liabilities, noncurrent	0	0
Fair Value, Recurring \| Level 1 \| Prepaids and other current assets \| Foreign Exchange Derivative
Assets
Other assets	0	0
Fair Value, Recurring \| Level 1 \| Certificates of deposit
Assets
Short-term investments	0	0
Fair Value, Recurring \| Level 1 \| Government bonds
Assets
Short-term investments	0	0
Fair Value, Recurring \| Level 1 \| Commercial paper
Assets
Short-term investments	0	0
Fair Value, Recurring \| Level 1 \| Corporate debt securities
Assets
Short-term investments	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
Short-term investments	0	0
Fair Value, Recurring \| Level 1 \| Money market funds
Assets
Cash and cash equivalents	1,273	2,018
Funds receivable and amounts held on behalf of customers	1,640	1,360
Fair Value, Recurring \| Level 1 \| Certificates of deposit
Assets
Cash and cash equivalents		0
Fair Value, Recurring \| Level 1 \| Government bonds
Assets
Cash and cash equivalents	0	0
Fair Value, Recurring \| Level 1 \| Commercial paper
Assets
Cash and cash equivalents	0	0
Fair Value, Recurring \| Level 1 \| Corporate debt securities
Assets
Cash and cash equivalents	0	0
Fair Value, Recurring \| Level 2
Assets
Cash and cash equivalents	145	351
Short-term investments	2,826	2,507
Total assets at fair value	2,983	2,885
Liabilities
Total liabilities at fair value	74	60
Fair Value, Recurring \| Level 2 \| Foreign Exchange Derivative
Liabilities
Accrued expenses, accounts payable, and other current liabilities	72	55
Other liabilities, noncurrent	2	5
Fair Value, Recurring \| Level 2 \| Prepaids and other current assets \| Foreign Exchange Derivative
Assets
Other assets	12	27
Fair Value, Recurring \| Level 2 \| Certificates of deposit
Assets
Short-term investments	10	172
Fair Value, Recurring \| Level 2 \| Government bonds
Assets
Short-term investments	301	333
Fair Value, Recurring \| Level 2 \| Commercial paper
Assets
Short-term investments	231	366
Fair Value, Recurring \| Level 2 \| Corporate debt securities
Assets
Short-term investments	1,934	1,491
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
Short-term investments	350	145
Fair Value, Recurring \| Level 2 \| Money market funds
Assets
Cash and 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 and cash equivalents		1
Fair Value, Recurring \| Level 2 \| Government bonds
Assets
Cash and cash equivalents	47	115
Fair Value, Recurring \| Level 2 \| Commercial paper
Assets
Cash and cash equivalents	75	223
Fair Value, Recurring \| Level 2 \| Corporate debt securities
Assets
Cash and cash equivalents	23	12
Fair Value, Recurring \| Level 3
Assets
Cash and cash equivalents	0	0
Short-term investments	0	0
Total assets at fair value	4	4
Liabilities
Total liabilities at fair value	0	0
Fair Value, Recurring \| Level 3 \| Foreign Exchange Derivative
Liabilities
Accrued expenses, accounts payable, and other current liabilities	0	0
Other liabilities, noncurrent	0	0
Fair Value, Recurring \| Level 3 \| Prepaids and other current assets \| Foreign Exchange Derivative
Assets
Other assets	0	0
Fair Value, Recurring \| Level 3 \| Certificates of deposit
Assets
Short-term investments	0	0
Fair Value, Recurring \| Level 3 \| Government bonds
Assets
Short-term investments	0	0
Fair Value, Recurring \| Level 3 \| Commercial paper
Assets
Short-term investments	0	0
Fair Value, Recurring \| Level 3 \| Corporate debt securities
Assets
Short-term investments	0	0
Fair Value, Recurring \| Level 3 \| Corporate debt securities \| Other assets, noncurrent
Assets
Other assets	4	4
Fair Value, Recurring \| Level 3 \| Mortgage-backed and asset-backed securities
Assets
Short-term investments	0	0
Fair Value, Recurring \| Level 3 \| Money market funds
Assets
Cash and 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 and cash equivalents		0
Fair Value, Recurring \| Level 3 \| Government bonds
Assets
Cash and cash equivalents	0	0
Fair Value, Recurring \| Level 3 \| Commercial paper
Assets
Cash and cash equivalents	0	0
Fair Value, Recurring \| Level 3 \| Corporate debt securities
Assets
Cash and cash equivalents	$ 0	$ 0

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Fair value portion of asset recognized for present right to economic benefit.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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