Accounts Payable, Accrued Expenses and Other Current Liabilities - Additional Information (Detail) - USD ($) $ in Millions	Oct. 31, 2015	Jan. 31, 2015
Payables And Accruals [Abstract]
Accounts payable includes negative cash balances	$ 20.3	$ 17.5

Cash and cash equivalents negative book balances carried by cash disbursement accounts.

No definition available.

Name:	rh_CashAndCashEquivalentsNegativeBookBalancesCarriedByCashDisbursementAccounts
Namespace Prefix:	rh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant