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Investments - Total Investment Schedule (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Total Investments [Line Items] |  |
Current | $ 2,877 | $ 3,117
Long-term | 21,124 | 23,025
Total | 24,001 | 26,142
Debt securities available for sale |  |
Total Investments [Line Items] |  |
Current | 2,775 | 3,009
Long-term | 17,976 | 20,231
Total | 20,751 | 23,240
Mortgage loans |  |
Total Investments [Line Items] |  |
Current | 88 | 58
Long-term | 905 | 844
Total | 993 | 902
Other investments |  |
Total Investments [Line Items] |  |
Current | 14 | 50
Long-term | 2,243 | 1,950
Total | $ 2,257 | $ 2,000

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