Investment Securities - Schedule of Company Holding Shares of FHLB-NY Stock and FHLB-Indianapolis Stock (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Federal home loan bank stock	$ 1,146	$ 1,392
Federal Reserve Bank Stock	219	203
FHLB-Indianapolis
Schedule of Investments [Line Items]
Federal home loan bank stock	329	328
FHLB-NY
Schedule of Investments [Line Items]
Federal home loan bank stock	$ 598	$ 861

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details