Business Segments - Depreciation and Amortization (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Segment Reporting Information [Line Items] | |||
| Total | $ 2,182 | $ 2,392 | $ 4,856 |
| GreenSky | |||
| Segment Reporting Information [Line Items] | |||
| Increase (decrease) in intangible assets | 506 | ||
| Global Banking & Markets | |||
| Segment Reporting Information [Line Items] | |||
| Total | 1,159 | 1,224 | 1,176 |
| Asset & Wealth Management | |||
| Segment Reporting Information [Line Items] | |||
| Total | 905 | 977 | 2,423 |
| Asset & Wealth Management | Property Leasehold Improvements And Equipment | |||
| Segment Reporting Information [Line Items] | |||
| Asset impairment charges | 1,460 | ||
| Platform Solutions | |||
| Segment Reporting Information [Line Items] | |||
| Total | $ 118 | 191 | 1,257 |
| Increase (decrease) in intangible assets | $ 72 | ||
| Platform Solutions | GreenSky | |||
| Segment Reporting Information [Line Items] | |||
| Goodwill impairment loss | $ 504 | ||
| Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other expenses | ||