v3.24.2.u1
Fair Value Measurement of Assets and Liabilities - Financial Assets and Liabilities Measured at Fair Value, Recurring (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Assets:    
Equity investment in Aurelia $ 1,910 $ 0
Liabilities:    
Aurelia option 109 0
Long-term investments:    
Assets:    
Equity investment in Aurelia 354 382
Recurring    
Assets:    
Cash and cash equivalents 2,555 2,493
Derivatives 380 396
Total financial assets 7,624 10,830
Liabilities:    
Aurelia option 109  
Other liabilities   10
Derivatives 10 33
Recurring | Cash and cash equivalents    
Assets:    
Cash and cash equivalents 1,963 1,985
Recurring | Customer accounts    
Assets:    
Cash and cash equivalents 478 481
Recurring | Restricted cash included in other current assets    
Assets:    
Cash and cash equivalents 112 23
Recurring | Restricted cash included in other assets    
Assets:    
Cash and cash equivalents 2 4
Recurring | Adevinta    
Assets:    
Equity investment in Aurelia   4,474
Recurring | Short-term investments:    
Assets:    
Investments 3,203 2,533
Recurring | Long-term investments:    
Assets:    
Investments 1,486 934
Recurring | Long-term investments: | Equity investment under the fair value option    
Assets:    
Investments 307 335
Recurring | Corporate debt securities | Short-term investments:    
Assets:    
Investments 2,749 2,162
Recurring | Corporate debt securities | Long-term investments:    
Assets:    
Investments 770 328
Recurring | Government and agency securities | Short-term investments:    
Assets:    
Investments 454 371
Recurring | Government and agency securities | Long-term investments:    
Assets:    
Investments 409 271
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Cash and cash equivalents 2,555 2,493
Derivatives 0 0
Total financial assets 2,555 6,967
Liabilities:    
Aurelia option 0  
Other liabilities   0
Derivatives 0 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents    
Assets:    
Cash and cash equivalents 1,963 1,985
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Customer accounts    
Assets:    
Cash and cash equivalents 478 481
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Restricted cash included in other current assets    
Assets:    
Cash and cash equivalents 112 23
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Restricted cash included in other assets    
Assets:    
Cash and cash equivalents 2 4
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Adevinta    
Assets:    
Equity investment in Aurelia   4,474
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term investments:    
Assets:    
Investments 0 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term investments:    
Assets:    
Investments 0 0
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) | 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 | Significant Other Observable Inputs (Level 2)    
Assets:    
Cash and cash equivalents 0 0
Derivatives 41 32
Total financial assets 4,423 3,164
Liabilities:    
Aurelia option 0  
Other liabilities   0
Derivatives 10 33
Recurring | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents    
Assets:    
Cash and cash equivalents 0 0
Recurring | Significant Other Observable Inputs (Level 2) | Customer accounts    
Assets:    
Cash and cash equivalents 0 0
Recurring | Significant Other Observable Inputs (Level 2) | Restricted cash included in other current assets    
Assets:    
Cash and cash equivalents 0 0
Recurring | Significant Other Observable Inputs (Level 2) | Restricted cash included in other assets    
Assets:    
Cash and cash equivalents 0 0
Recurring | Significant Other Observable Inputs (Level 2) | Adevinta    
Assets:    
Equity investment in Aurelia   0
Recurring | Significant Other Observable Inputs (Level 2) | Short-term investments:    
Assets:    
Investments 3,203 2,533
Recurring | Significant Other Observable Inputs (Level 2) | Long-term investments:    
Assets:    
Investments 1,179 599
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) | Corporate debt securities | Short-term investments:    
Assets:    
Investments 2,749 2,162
Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt securities | Long-term investments:    
Assets:    
Investments 770 328
Recurring | Significant Other Observable Inputs (Level 2) | Government and agency securities | Short-term investments:    
Assets:    
Investments 454 371
Recurring | Significant Other Observable Inputs (Level 2) | Government and agency securities | Long-term investments:    
Assets:    
Investments 409 271
Recurring | Significant Unobservable Inputs (Level 3)    
Assets:    
Cash and cash equivalents 0 0
Derivatives 339 364
Total financial assets 646 699
Liabilities:    
Aurelia option 109  
Other liabilities   10
Derivatives 0 0
Recurring | Significant Unobservable Inputs (Level 3) | Cash and cash equivalents    
Assets:    
Cash and cash equivalents 0 0
Recurring | Significant Unobservable Inputs (Level 3) | Customer accounts    
Assets:    
Cash and cash equivalents 0 0
Recurring | Significant Unobservable Inputs (Level 3) | Restricted cash included in other current assets    
Assets:    
Cash and cash equivalents 0 0
Recurring | Significant Unobservable Inputs (Level 3) | Restricted cash included in other assets    
Assets:    
Cash and cash equivalents 0 0
Recurring | Significant Unobservable Inputs (Level 3) | Adevinta    
Assets:    
Equity investment in Aurelia   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 307 335
Recurring | Significant Unobservable Inputs (Level 3) | Long-term investments: | Equity investment under the fair value option    
Assets:    
Investments 307 335
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