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Significant Accounting Policies - Summary of RHCA liability for lease loss (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Feb. 02, 2019 | Feb. 03, 2018
Accounting Policies [Abstract] |  |
Balance at beginning of fiscal year | $ 7,100 | $ 3,188
Lease loss liability remeasurement | 3,411 | 4,417
Payments made under lease agreement | (2,249) | (1,699)
Payments received under sublease agreement | (1,138) | (1,003)
Interest | 415 | 191
Balance at end of fiscal year | $ 9,815 | $ 7,100

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- Definition Liability for lease losses. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLosses
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Liability for lease losses interest. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLossesInterest
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Liability for lease losses payments for under lease agreement. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLossesPaymentsForUnderLeaseAgreement
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Liability for lease losses Payments received under sublease agreement. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLossesPaymentsReceivedUnderSubleaseAgreement
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Liability for lease losses re-measurement. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLossesReMeasurement
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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