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Investment Securities (Details 2) $ in Millions | Dec. 31, 2022 USD ($) security | Dec. 31, 2021 USD ($) security
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Available-for-sale investment securities with gross unrealized losses |  |
Number of Securities, Less than 12 months | security | 88 | 5
Number of Securities, 12 months or more | security | 3 | 0
Number of Securities, Total | security | 91 | 5
Available-for-sale investment securities with gross unrealized losses and length of time |  |
Estimated Fair Value, Less than 12 months | $ 4,311 | $ 477
Estimated Fair Value, 12 months or more | 52 | 0
Estimated Fair Value, Total | 4,363 | 477
Available-for-sale investment securities with gross unrealized losses |  |
Gross Unrealized Losses, Less than 12 months | (83) | (1)
Gross Unrealized Losses, 12 months or more | (1) | 0
Gross Unrealized Losses, Total | $ (84) | $ (1)
90%–100% |  |
Available-for-sale investment securities with gross unrealized losses |  |
Number of Securities, Less than 12 months | security | 74 | 5
Number of Securities, 12 months or more | security | 3 | 0
Number of Securities, Total | security | 77 | 5
Available-for-sale investment securities with gross unrealized losses and length of time |  |
Estimated Fair Value, Less than 12 months | $ 4,287 | $ 477
Estimated Fair Value, 12 months or more | 52 | 0
Estimated Fair Value, Total | 4,339 | 477
Available-for-sale investment securities with gross unrealized losses |  |
Gross Unrealized Losses, Less than 12 months | (74) | (1)
Gross Unrealized Losses, 12 months or more | (1) | 0
Gross Unrealized Losses, Total | $ (75) | $ (1)
Less than 90% |  |
Available-for-sale investment securities with gross unrealized losses |  |
Number of Securities, Less than 12 months | security | 14 | 0
Number of Securities, 12 months or more | security | 0 | 0
Number of Securities, Total | security | 14 | 0
Available-for-sale investment securities with gross unrealized losses and length of time |  |
Estimated Fair Value, Less than 12 months | $ 24 | $ 0
Estimated Fair Value, 12 months or more | 0 | 0
Estimated Fair Value, Total | 24 | 0
Available-for-sale investment securities with gross unrealized losses |  |
Gross Unrealized Losses, Less than 12 months | (9) | 0
Gross Unrealized Losses, 12 months or more | 0 | 0
Gross Unrealized Losses, Total | $ (9) | $ 0

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