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Borrowings - Narrative (Details)	3 Months Ended
	Mar. 31, 2023
Funding facilities and Other financing facilities
Debt Instrument [Line Items]
Commitment fees (in percent)	0.50%

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentAxis=rkt_FundingFacilitiesAndOtherFinancingFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: