| Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | |||||
|---|---|---|---|---|---|---|---|
| Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024 | Jul. 02, 2024 | Feb. 28, 2023 | |
| 3.125% Exchangeable senior debentures due 2053 | |||||||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | |||||||
| Interest rate (as a percent) | 3.125% | 3.125% | 3.125% | 3.125% | 3.125% | ||
| 3.125% Exchangeable senior debentures due 2054 | |||||||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | |||||||
| Interest rate (as a percent) | 3.125% | 3.125% | 3.125% | 3.125% | |||
| Recognition of previously unrecognized gains | $ 53 | $ 53 | |||||
| Exchangeable senior debentures | |||||||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | |||||||
| Change in fair value | $ 8 | $ 5 | (9) | $ (15) | |||
| Cumulative change | $ 20 | ||||||
| X | ||||||||||
| 
- Definition The amount of gain (loss) on cumulative change in the fair value of the derivative instrument. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
 | 
| X | ||||||||||
| 
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
 | 
| X | ||||||||||
| 
- Definition Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for unrealized gain (loss) from increase (decrease) in instrument-specific credit risk, realized upon derecognition of financial liability measured under fair value option. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
 | 
| X | ||||||||||
| 
- Definition Amount, before tax and reclassification adjustment, of unrealized gain (loss) from increase (decrease) in instrument-specific credit risk of financial liability measured under fair value option. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
 | 
| X | ||||||||||
| 
- Details 
 | 
| X | ||||||||||
| 
- Details 
 | 
| X | ||||||||||
| 
- Details 
 |