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Net Investment Income | 12 Months Ended
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Dec. 31, 2021
Net Investment Income [Abstract] |
Net Investment Income | NOTE 14. Net Investment Income: The components of net investment income are summarized as follows:
| Year ended December 31, |
| 2021 |  |  | 2020 |  |  | 2019 |
| (in millions) |
Interest on: |  |  |  |  |  |  |  |  |  |  |
Debt securities | $ | 133 |  |  | $ | 126 |  |  | $ | 163 |
Deposits and other investments |  | 47 |  |  |  | 69 |  |  |  | 123 |
Dividends on equity securities |  | 11 |  |  |  | 11 |  |  |  | 12 |
Deferred compensation plan assets |  | 19 |  |  |  | 13 |  |  |  | 17 |
Equity in earnings of affiliates, net |  | 7 |  |  |  | 6 |  |  |  | 3 |
Other |  | 1 |  |  |  | — |  |  |  | 2 |
Total investment income |  | 218 |  |  |  | 225 |  |  |  | 320 |
Investment expenses |  | (3 | ) |  |  | (4 | ) |  |  | (4 | )
Net investment income | $ | 215 |  |  | $ | 221 |  |  | $ | 316 |

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