Variable Interest Entities (Details) - Variable Interest Entity, Primary Beneficiary - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Assets | ||
| Total assets | $ 13,745 | $ 11,325 |
| Liabilities | ||
| Total liabilities | 8,515 | 7,747 |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent | ||
| Liabilities | ||
| Total liabilities | 5 | 5 |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:MortgagesHeldForSaleFairValueDisclosure | ||
| Assets | ||
| Total assets | 7,298 | 6,792 |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssets | ||
| Assets | ||
| Total assets | 649 | 579 |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:SecuredDebt | ||
| Liabilities | ||
| Total liabilities | 8,510 | 7,742 |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:ServicingAssetAtFairValueAmount | ||
| Assets | ||
| Total assets | 4,577 | 2,964 |
| Location, Statement of Financial Position, Balance [Axis]: rkt:AdvancesReceivablesNet | ||
| Assets | ||
| Total assets | $ 1,221 | $ 990 |