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Investments - Total Investment Schedule (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Total Investments [Line Items] |  |
Current | $ 2,973 | $ 3,117
Long-term | 22,595 | 23,025
Total | 25,568 | 26,142
Thailand Business |  |
Total Investments [Line Items] |  |
Current investments accounted for as assets held for sale | 73 |
Debt securities available for sale |  |
Total Investments [Line Items] |  |
Current | 2,826 | 3,009
Long-term | 19,672 | 20,231
Total | 22,498 | 23,240
Mortgage loans |  |
Total Investments [Line Items] |  |
Current | 114 | 58
Long-term | 804 | 844
Total | 918 | 902
Other investments |  |
Total Investments [Line Items] |  |
Current | 33 | 50
Long-term | 2,119 | 1,950
Total | $ 2,152 | $ 2,000

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