v3.25.0.1
Fair Value Measurement of Assets and Liabilities - Financial Assets and Liabilities Measured at Fair Value, Recurring (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Assets:    
Derivative Asset, Statement of Financial Position, Extensible Enumeration, Derivatives Derivatives
Liabilities:    
Derivative Liability, Statement of Financial Position, Extensible Enumeration, Not Disclosed Flag Derivatives Derivatives
Long-term investments:    
Assets:    
Equity investment in Adevinta $ 54 $ 382
Fair Value, Measurements, Recurring    
Assets:    
Cash and cash equivalents 3,286 2,493
Derivatives 97 396
Total financial assets 8,149 10,830
Liabilities:    
Other liabilities   10
Derivatives 18 33
Fair Value, Measurements, Recurring | Adevinta    
Assets:    
Equity investment in Adevinta   4,474
Fair Value, Measurements, Recurring | Short-term investments:    
Assets:    
Investments 3,457 2,533
Fair Value, Measurements, Recurring | Short-term investments: | Corporate debt securities    
Assets:    
Investments 3,094 2,162
Fair Value, Measurements, Recurring | Short-term investments: | Government and agency securities    
Assets:    
Investments 363 371
Fair Value, Measurements, Recurring | Long-term investments:    
Assets:    
Investments 1,309 934
Fair Value, Measurements, Recurring | Long-term investments: | Equity investment under the fair value option    
Assets:    
Investments   335
Fair Value, Measurements, Recurring | Long-term investments: | Corporate debt securities    
Assets:    
Investments 1,119 328
Fair Value, Measurements, Recurring | Long-term investments: | Government and agency securities    
Assets:    
Investments 190 271
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Cash and cash equivalents 3,286 2,493
Derivatives 0 0
Total financial assets 3,286 6,967
Liabilities:    
Other liabilities   0
Derivatives 0 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Adevinta    
Assets:    
Equity investment in Adevinta   4,474
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term investments:    
Assets:    
Investments 0 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term investments: | Corporate debt securities    
Assets:    
Investments 0 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term investments: | Government and agency securities    
Assets:    
Investments 0 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term investments:    
Assets:    
Investments 0 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term investments: | Equity investment under the fair value option    
Assets:    
Investments   0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term investments: | Corporate debt securities    
Assets:    
Investments 0 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term investments: | Government and agency securities    
Assets:    
Investments 0 0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Assets:    
Cash and cash equivalents 0 0
Derivatives 82 32
Total financial assets 4,848 3,164
Liabilities:    
Other liabilities   0
Derivatives 18 33
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Adevinta    
Assets:    
Equity investment in Adevinta   0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Short-term investments:    
Assets:    
Investments 3,457 2,533
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Short-term investments: | Corporate debt securities    
Assets:    
Investments 3,094 2,162
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Short-term investments: | Government and agency securities    
Assets:    
Investments 363 371
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Long-term investments:    
Assets:    
Investments 1,309 599
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Long-term investments: | Equity investment under the fair value option    
Assets:    
Investments   0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Long-term investments: | Corporate debt securities    
Assets:    
Investments 1,119 328
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Long-term investments: | Government and agency securities    
Assets:    
Investments 190 271
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)    
Assets:    
Cash and cash equivalents 0 0
Derivatives 15 364
Total financial assets 15 699
Liabilities:    
Other liabilities   10
Derivatives 0 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Adevinta    
Assets:    
Equity investment in Adevinta   0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Short-term investments:    
Assets:    
Investments 0 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Short-term investments: | Corporate debt securities    
Assets:    
Investments 0 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Short-term investments: | Government and agency securities    
Assets:    
Investments 0 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Long-term investments:    
Assets:    
Investments 0 335
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Long-term investments: | Equity investment under the fair value option    
Assets:    
Investments   335
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Long-term investments: | Corporate debt securities    
Assets:    
Investments 0 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Long-term investments: | Government and agency securities    
Assets:    
Investments 0 0
Cash and cash equivalents | Fair Value, Measurements, Recurring    
Assets:    
Cash and cash equivalents 2,433 1,985
Cash and cash equivalents | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Cash and cash equivalents 2,433 1,985
Cash and cash equivalents | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Assets:    
Cash and cash equivalents 0 0
Cash and cash equivalents | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)    
Assets:    
Cash and cash equivalents 0 0
Customer accounts | Fair Value, Measurements, Recurring    
Assets:    
Cash and cash equivalents 763 481
Customer accounts | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Cash and cash equivalents 763 481
Customer accounts | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Assets:    
Cash and cash equivalents 0 0
Customer accounts | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)    
Assets:    
Cash and cash equivalents 0 0
Restricted cash included in other current assets | Fair Value, Measurements, Recurring    
Assets:    
Cash and cash equivalents 88 23
Restricted cash included in other current assets | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Cash and cash equivalents 88 23
Restricted cash included in other current assets | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Assets:    
Cash and cash equivalents 0 0
Restricted cash included in other current assets | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)    
Assets:    
Cash and cash equivalents 0 0
Restricted cash included in other assets | Fair Value, Measurements, Recurring    
Assets:    
Cash and cash equivalents 2 4
Restricted cash included in other assets | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Cash and cash equivalents 2 4
Restricted cash included in other assets | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Assets:    
Cash and cash equivalents 0 0
Restricted cash included in other assets | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)    
Assets:    
Cash and cash equivalents $ 0 $ 0