Intangible Assets - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Feb. 01, 2026 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
May 01, 2026 |
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| Intangible Asset, Finite-Lived | ||||||
| Amortization expense | $ 63 | $ 7 | $ 108 | $ 15 | ||
| DUS | ||||||
| Intangible Asset, Finite-Lived | ||||||
| Acquired finite-lived intangible asset | $ 83 | |||||
| Comerica Incorporated | ||||||
| Intangible Asset, Finite-Lived | ||||||
| Acquired finite-lived intangible asset | $ 1,209 | |||||
| Core deposit intangibles | Comerica Incorporated | ||||||
| Intangible Asset, Finite-Lived | ||||||
| Acquired finite-lived intangible asset | $ 1,200 | |||||
| Weighted-average useful life, acquired finite-lived intangible assets | 10 years | |||||
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- Definition Weighted-average period of amortization for finite-lived intangible asset acquired in business combination, asset acquisition, and from joint venture formation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of identifiable intangible asset acquired in business combination and recognized at acquisition date. Excludes goodwill and financial asset. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition 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. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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