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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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Derivative Instruments and Hedging Activities - Schedule of Estimated Fair Value of Derivative Instruments included in the Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Dec. 22, 2025	Jun. 28, 2024
Designated as Hedging Instrument
Derivative [Line Items]
Estimated fair value of derivative assets	$ 131	$ 130
Estimated fair value of derivative liabilities	11	1
Not Designated as Hedging Instruments
Derivative [Line Items]
Estimated fair value of derivative assets	59	41
Estimated fair value of derivative liabilities	169	40
Cash Flow Hedges
Derivative [Line Items]
Estimated fair value of derivative assets	79	83
Estimated fair value of derivative liabilities	0	0
Fair Value Hedges
Derivative [Line Items]
Estimated fair value of derivative assets	52	47
Estimated fair value of derivative liabilities	11	1
Interest rate contracts \| Not Designated as Hedging Instruments
Derivative [Line Items]
Notional Amount	27,013	6,425
Estimated fair value of derivative assets	56	40
Estimated fair value of derivative liabilities	167	40
Interest rate contracts \| Cash Flow Hedges
Derivative [Line Items]
Notional Amount	12,250	9,750
Estimated fair value of derivative assets	79	83
Estimated fair value of derivative liabilities	0	0
Interest rate contracts \| Fair Value Hedges
Derivative [Line Items]
Notional Amount	7,207	4,340
Estimated fair value of derivative assets	52	47
Estimated fair value of derivative liabilities	11	1
Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans \| Not Designated as Hedging Instruments \| Mortgage derivatives - interest rate lock commitments
Derivative [Line Items]
Notional Amount	122	64
Estimated fair value of derivative assets	2	1
Estimated fair value of derivative liabilities	0	0
Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans \| Not Designated as Hedging Instruments \| Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans
Derivative [Line Items]
Notional Amount	124	53
Estimated fair value of derivative assets	0	0
Estimated fair value of derivative liabilities	0	0
Foreign exchange contracts \| Not Designated as Hedging Instruments
Derivative [Line Items]
Notional Amount	163	0
Estimated fair value of derivative assets	1	0
Estimated fair value of derivative liabilities	0	0
Visa derivative \| Not Designated as Hedging Instruments
Derivative [Line Items]
Notional Amount	0	0
Estimated fair value of derivative assets	0	0
Estimated fair value of derivative liabilities	2	0
Credit default swap \| Not Designated as Hedging Instruments
Derivative [Line Items]
Notional Amount	143	153	$ 80	$ 87
Estimated fair value of derivative assets	0	0
Estimated fair value of derivative liabilities	$ 0	$ 0