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

X

- 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

X

- 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

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration