Accounts Payable, Accrued Expenses and Other Current Liabilities - Additional Information (Detail) - USD ($) $ in Millions	Aug. 01, 2015	Jan. 31, 2015
Payables and Accruals [Abstract]
Accounts payable includes negative cash balances	$ 17.5	$ 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