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v3.22.4

Investment Securities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Available-for-sale debt securities: |  |
Cost | $ 4,621 |
Estimated Fair Value | 4,537 | $ 2,512
Equity securities |  |
Cost | 50 | 66
Gross Unrealized Gains | 0 | 17
Gross Unrealized Losses | (9) | (4)
Estimated Fair Value | 41 | 79
Total Cost | 4,671 | 2,548
Total Gross Unrealized Gains | 0 | 48
Total Gross Unrealized Losses | (93) | (5)
Total Estimated Fair Value | 4,578 | 2,591
State and municipal obligations |  |
Available-for-sale debt securities: |  |
Cost | 64 | 106
Gross Unrealized Gains | 0 | 5
Gross Unrealized Losses | (10) | 0
Estimated Fair Value | 54 | 111
U.S. Government agency obligations |  |
Available-for-sale debt securities: |  |
Cost | 5 | 6
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 5 | 6
U.S. Government treasury obligations |  |
Available-for-sale debt securities: |  |
Cost | 3,859 | 1,680
Gross Unrealized Gains | 0 | 25
Gross Unrealized Losses | (73) | (1)
Estimated Fair Value | 3,786 | 1,704
Mortgage-backed securities |  |
Available-for-sale debt securities: |  |
Cost | 13 | 17
Gross Unrealized Gains | 0 | 1
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 13 | 18
Foreign government bonds and obligations |  |
Available-for-sale debt securities: |  |
Cost | 633 | 630
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (1) | 0
Estimated Fair Value | 632 | 630
Other |  |
Available-for-sale debt securities: |  |
Cost | 47 | 43
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | $ 47 | $ 43

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