Fair Value Measurement of Assets and Liabilities - Financial Assets and Liabilities Measured at Fair Value, Recurring (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Adevinta
Assets:
Equity investment in Adevinta	$ 2,866	$ 2,692
Long-term investments:
Assets:
Equity investment in Adevinta	460	461
Recurring
Assets:
Cash and cash equivalents	2,082	2,154
Derivatives	314	336
Total financial assets	8,680	9,454
Liabilities:
Other liabilities	24	14
Derivatives	32	47
Recurring | Adevinta
Assets:
Equity investment in Adevinta	2,866	2,692
Recurring | Short-term investments:
Assets:
Investments	1,922	2,625
Recurring | Long-term investments:
Assets:
Investments	1,496	1,647
Recurring | Long-term investments: | Equity investment under the fair value option
Assets:
Investments	420	431
Recurring | Restricted cash | Short-term investments:
Assets:
Investments	41	36
Recurring | Restricted cash | Long-term investments:
Assets:
Investments	5	13
Recurring | Corporate debt securities | Short-term investments:
Assets:
Investments	1,643	2,350
Recurring | Corporate debt securities | Long-term investments:
Assets:
Investments	485	646
Recurring | Government and agency securities | Short-term investments:
Assets:
Investments	137	135
Recurring | Government and agency securities | Long-term investments:
Assets:
Investments	586	557
Recurring | Equity investments with readily determinable fair values | Short-term investments:
Assets:
Investments	101	104
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	2,082	2,154
Derivatives	0	0
Total financial assets	5,095	4,999
Liabilities:
Other liabilities	0	0
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Adevinta
Assets:
Equity investment in Adevinta	2,866	2,692
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term investments:
Assets:
Investments	142	140
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term investments:
Assets:
Investments	5	13
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term investments: | Equity investment under the fair value option
Assets:
Investments	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Restricted cash | Short-term investments:
Assets:
Investments	41	36
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Restricted cash | Long-term investments:
Assets:
Investments	5	13
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities | Short-term investments:
Assets:
Investments	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities | Long-term investments:
Assets:
Investments	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Government and agency securities | Short-term investments:
Assets:
Investments	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Government and agency securities | Long-term investments:
Assets:
Investments	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity investments with readily determinable fair values | Short-term investments:
Assets:
Investments	101	104
Recurring | Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents	0	0
Derivatives	62	122
Total financial assets	2,913	3,810
Liabilities:
Other liabilities	0	0
Derivatives	32	47
Recurring | Significant Other Observable Inputs (Level 2) | Adevinta
Assets:
Equity investment in Adevinta	0	0
Recurring | Significant Other Observable Inputs (Level 2) | Short-term investments:
Assets:
Investments	1,780	2,485
Recurring | Significant Other Observable Inputs (Level 2) | Long-term investments:
Assets:
Investments	1,071	1,203
Recurring | Significant Other Observable Inputs (Level 2) | Long-term investments: | Equity investment under the fair value option
Assets:
Investments	0	0
Recurring | Significant Other Observable Inputs (Level 2) | Restricted cash | Short-term investments:
Assets:
Investments	0	0
Recurring | Significant Other Observable Inputs (Level 2) | Restricted cash | Long-term investments:
Assets:
Investments	0	0
Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt securities | Short-term investments:
Assets:
Investments	1,643	2,350
Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt securities | Long-term investments:
Assets:
Investments	485	646
Recurring | Significant Other Observable Inputs (Level 2) | Government and agency securities | Short-term investments:
Assets:
Investments	137	135
Recurring | Significant Other Observable Inputs (Level 2) | Government and agency securities | Long-term investments:
Assets:
Investments	586	557
Recurring | Significant Other Observable Inputs (Level 2) | Equity investments with readily determinable fair values | Short-term investments:
Assets:
Investments	0	0
Recurring | Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	0	0
Derivatives	252	214
Total financial assets	672	645
Liabilities:
Other liabilities	24	14
Derivatives	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Adevinta
Assets:
Equity investment in Adevinta	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Short-term investments:
Assets:
Investments	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Long-term investments:
Assets:
Investments	420	431
Recurring | Significant Unobservable Inputs (Level 3) | Long-term investments: | Equity investment under the fair value option
Assets:
Investments	420	431
Recurring | Significant Unobservable Inputs (Level 3) | Restricted cash | Short-term investments:
Assets:
Investments	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Restricted cash | Long-term investments:
Assets:
Investments	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Corporate debt securities | Short-term investments:
Assets:
Investments	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Corporate debt securities | Long-term investments:
Assets:
Investments	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Government and agency securities | Short-term investments:
Assets:
Investments	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Government and agency securities | Long-term investments:
Assets:
Investments	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Equity investments with readily determinable fair values | Short-term investments:
Assets:
Investments	$ 0	$ 0