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Fair Value Measurements - Financial Instruments Not Required to be Measured at Fair Value (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Carrying Value | Level 2 |  |
Fair value of assets and liabilities measured on recurring basis |  |
Marketable securities, current | $ 130 | $ 69
Carrying Value | Level 2 | 2028 Notes (4.250% Senior Notes) |  |
Fair value of assets and liabilities measured on recurring basis |  |
Debt | 541 | 597
Carrying Value | Level 2 | 2029 Notes (1.125% Convertible Senior Notes) |  |
Fair value of assets and liabilities measured on recurring basis |  |
Debt | 563 | 561
Carrying Value | Level 3 |  |
Fair value of assets and liabilities measured on recurring basis |  |
Notes receivable, including noncurrent portion | 9 | 9
Fair Value | Level 2 |  |
Fair value of assets and liabilities measured on recurring basis |  |
Marketable securities, current | 130 | 69
Fair Value | Level 2 | 2028 Notes (4.250% Senior Notes) |  |
Fair value of assets and liabilities measured on recurring basis |  |
Debt | 517 | 573
Fair Value | Level 2 | 2029 Notes (1.125% Convertible Senior Notes) |  |
Fair value of assets and liabilities measured on recurring basis |  |
Debt | 725 | 626
Fair Value | Level 3 |  |
Fair value of assets and liabilities measured on recurring basis |  |
Notes receivable, including noncurrent portion | 9 | 9
Cash | Carrying Value | Level 1 |  |
Fair value of assets and liabilities measured on recurring basis |  |
Cash and cash equivalents | 1,613 | 1,357
Cash | Fair Value | Level 1 |  |
Fair value of assets and liabilities measured on recurring basis |  |
Cash and cash equivalents | 1,613 | 1,357
Cash equivalents | Carrying Value | Level 2 |  |
Fair value of assets and liabilities measured on recurring basis |  |
Cash and cash equivalents | 1,216 | 1,162
Cash equivalents | Fair Value | Level 2 |  |
Fair value of assets and liabilities measured on recurring basis |  |
Cash and cash equivalents | $ 1,216 | $ 1,162

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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. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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