Loans - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Loans Receivable [Line Items] | |||
| Percentage of loans that were rated pass/non-criticized | 95.00% | 95.00% | 93.00% |
| Increase (decrease) in allowance for credit loss | $ (2,460) | $ (330) | |
| Apple Card Loans | |||
| Loans Receivable [Line Items] | |||
| Increase (decrease) in allowance for credit loss | $ (2,480) | $ (2,480) | |