Derivative Instruments and Hedging Activities - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Additional amounts estimated to be reclassified from AOCI	$ 13
Hedged Asset, Statement of Financial Position [Extensible Enumeration]	Available for sale securities	Available for sale securities
Designated as Hedging Instrument \| Interest rate swaps \| Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Aggregate notional amounts	$ 42,200	$ 30,900
Designated as Hedging Instrument \| Interest rate swaps \| Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Aggregate notional amounts	$ 18,700

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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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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Nominal or face amount used to calculate payment on derivative.

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