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Investments (Tables) | 12 Months Ended
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Dec. 31, 2024
Investments [Abstract] |
Marketable Securities [Table Text Block] | Our investments were as follows as of December 31:
(in millions) | 2024 |  | 2023
Short-term investments: |  |  |
Equity investment security | $ | 11 |  |  | $ | 11 |
Held-to-maturity investment securities | — |  |  | 3 |
Time deposits | 1 |  |  | — |
Total short-term investments | $ | 12 |  |  | $ | 14 |
Long-term investments: |  |  |
Other investments | $ | 90 |  |  | $ | 80 |
Restricted time deposits(1) | — |  |  | 355 |
Total long-term investments | $ | 90 |  |  | $ | 435 |
(1)As of December 31, 2023 the balance of restricted time deposits contained $96 million of restricted cash equivalents. See Note 11.

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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