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v3.25.1

Investment Securities - Summary (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Dec. 31, 2024
Debt Securities, Available-for-Sale [Line Items] |  |
Accrued interest available-for-sale debt securities | $ 3 | $ 3
Debt securities |  |
Cost | 1,072 |
Estimated Fair Value | 1,064 | 1,192
Equity securities |  |
Cost | 53 | 53
Gross Unrealized Gains | 1 | 4
Gross Unrealized Losses | (8) | (9)
Estimated Fair Value | 46 | 48
Total Cost | 1,125 | 1,256
Total Gross Unrealized Gains | 2 | 5
Total Gross Unrealized Losses | (17) | (21)
Total Estimated Fair Value | 1,110 | 1,240
State and municipal obligations |  |
Debt securities |  |
Cost | 56 | 57
Gross Unrealized Gains | 1 | 1
Gross Unrealized Losses | (8) | (9)
Estimated Fair Value | 49 | 49
U.S. Government agency obligations |  |
Debt securities |  |
Cost | 4 | 4
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 4 | 4
U.S. Government treasury obligations |  |
Debt securities |  |
Cost | 278 | 289
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (1) | (2)
Estimated Fair Value | 277 | 287
Mortgage-backed securities |  |
Debt securities |  |
Cost | 10 | 11
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | (1)
Estimated Fair Value | 10 | 10
Foreign government bonds and obligations |  |
Debt securities |  |
Cost | 652 | 765
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 652 | 765
Other |  |
Debt securities |  |
Cost | 72 | 77
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | $ 72 | $ 77

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