Fair Value of Financial Instruments (Details) - USD ($) |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Financial assets | ||
| Loans held-for-sale | $ 5,431,000,000 | $ 2,271,000,000 |
| Financial liabilities | ||
| Long-term debt | 79,274,000,000 | 72,591,000,000 |
| Demand deposits | 1,100,000,000,000 | 1,100,000,000,000 |
| Stated maturities | 0 | 0 |
| Carrying Value | ||
| Financial assets | ||
| Loans | 1,168,824,000,000 | 1,149,093,000,000 |
| Loans held-for-sale | 10,944,000,000 | 5,165,000,000 |
| Financial liabilities | ||
| Deposits | 2,037,663,000,000 | 2,018,729,000,000 |
| Long-term debt | 325,964,000,000 | 317,816,000,000 |
| Commercial unfunded lending commitments | 1,229,000,000 | 1,244,000,000 |
| Estimate of Fair Value Measurement | ||
| Financial assets | ||
| Loans | 1,154,191,000,000 | 1,136,439,000,000 |
| Loans held-for-sale | 10,944,000,000 | 5,165,000,000 |
| Financial liabilities | ||
| Deposits | 2,038,779,000,000 | 2,020,072,000,000 |
| Long-term debt | 329,749,000,000 | 324,406,000,000 |
| Commercial unfunded lending commitments | 6,744,000,000 | 6,740,000,000 |
| Estimate of Fair Value Measurement | Level 2 | ||
| Financial assets | ||
| Loans | 48,769,000,000 | 51,136,000,000 |
| Loans held-for-sale | 10,347,000,000 | 4,720,000,000 |
| Financial liabilities | ||
| Deposits | 2,038,779,000,000 | 2,020,072,000,000 |
| Long-term debt | 328,749,000,000 | 323,681,000,000 |
| Commercial unfunded lending commitments | 68,000,000 | 67,000,000 |
| Estimate of Fair Value Measurement | Level 3 | ||
| Financial assets | ||
| Loans | 1,105,422,000,000 | 1,085,303,000,000 |
| Loans held-for-sale | 597,000,000 | 445,000,000 |
| Financial liabilities | ||
| Deposits | 0 | 0 |
| Long-term debt | 1,000,000,000 | 725,000,000 |
| Commercial unfunded lending commitments | $ 6,676,000,000 | $ 6,673,000,000 |