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Fair Value of Financial Instruments - Fair Value Hierarchy for Long-term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total long-term debt, including current portion	$ 11,576	$ 10,761
Level 2 | Convertible Senior Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total long-term debt, including current portion	0	509
Level 2 | Other long-term debt, including current portion
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total long-term debt, including current portion	11,576	10,252
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total long-term debt, including current portion	261	0
Level 3 | Convertible Senior Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total long-term debt, including current portion	0	0
Level 3 | Other long-term debt, including current portion
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total long-term debt, including current portion	$ 261	$ 0

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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