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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2022
Accounting Policies [Abstract] |
Schedule of marketable securities | The aggregate carrying values of our short-term and long-term investment securities consisted of the following at June 30, 2022 and December 31, 2021 (in millions):
| June 30, 2022 |  | December 31, 2021
Available-for-sale investment securities |  |  |
Time deposits | $ | 795 |  |  | $ | 790 |
Debt securities | 10 |  |  | 8 |
Commercial Paper | 51 |  |  | 2 |
Total available-for-sale investment securities | 856 |  |  | 800 |
Held-to-maturity investment securities |  |  |
Corporate bonds | 120 |  |  | 37 |
Total held-to-maturity investment securities | 120 |  |  | 37 |
Equity investment securities |  |  |
Common stock of publicly traded companies | 17 |  |  | 26 |
Total equity investment securities | 17 |  |  | 26 |
Total investment securities | $ | 993 |  |  | $ | 863 |

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