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Commitments, Contingencies, and Guarantees - Interest Rate Lock Commitments (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Commitments and Contingencies Disclosure [Abstract] |  |
IRLCs UPB, fixed rate | $ 9,518,644 | $ 6,108,132
IRLCs UPB, variable rate | $ 421,972 | $ 326,638

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- Definition Interest Rate Lock Commitments, Unpaid Principal Balance, Fixed Rate + References No definition available. + Details
Name: | rkt_InterestRateLockCommitmentsUnpaidPrincipalBalanceFixedRate
Namespace Prefix: | rkt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Interest Rate Lock Commitments, Unpaid Principal Balance, Variable Rate + References No definition available. + Details
Name: | rkt_InterestRateLockCommitmentsUnpaidPrincipalBalanceVariableRate
Namespace Prefix: | rkt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration