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Fair Value Measurements - Financial Instruments Not Required to be Measured at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Carrying Value | Level 2
Fair value of assets and liabilities measured on recurring basis
Marketable securities, current	$ 59	$ 130
Carrying Value | Level 2 | 2028 Notes (4.250% Senior Notes)
Fair value of assets and liabilities measured on recurring basis
Debt	504	541
Carrying Value | Level 2 | 2029 Notes (1.125% Convertible Senior Notes)
Fair value of assets and liabilities measured on recurring basis
Debt	566	563
Fair Value | Level 2
Fair value of assets and liabilities measured on recurring basis
Marketable securities, current	59	130
Fair Value | Level 2 | 2028 Notes (4.250% Senior Notes)
Fair value of assets and liabilities measured on recurring basis
Debt	503	517
Fair Value | Level 2 | 2029 Notes (1.125% Convertible Senior Notes)
Fair value of assets and liabilities measured on recurring basis
Debt	657	725
Cash | Carrying Value | Level 1
Fair value of assets and liabilities measured on recurring basis
Cash and cash equivalents	1,480	1,613
Cash | Fair Value | Level 1
Fair value of assets and liabilities measured on recurring basis
Cash and cash equivalents	1,480	1,613
Cash equivalents | Carrying Value | Level 2
Fair value of assets and liabilities measured on recurring basis
Cash and cash equivalents	655	1,216
Cash equivalents | Fair Value | Level 2
Fair value of assets and liabilities measured on recurring basis
Cash and cash equivalents	$ 655	$ 1,216

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- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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