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Business Combinations - Schedule of Valuation of Core Deposits (Details) - USD ($) $ in Millions | Mar. 27, 2023 | Jan. 03, 2022
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CIT Group Inc. |  |
Business Acquisition [Line Items] |  |
Fair Value |  | $ 143
Core deposit intangibles | SVB |  |
Business Acquisition [Line Items] |  |
Fair Value | $ 230 |
Estimated Useful Life | 8 years |
Core deposit intangibles | CIT Group Inc. |  |
Business Acquisition [Line Items] |  |
Fair Value |  | $ 143
Estimated Useful Life |  | 10 years

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