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Earnings Per Share (Details) (USD $)
3 Months Ended
May 02, 2015
May 03, 2014
Earnings Per Share [Abstract]    
Weighted average shares excluded from calculation of diluted EPS 142,500us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 127,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Basic (in shares) 203,827,000us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 208,949,000us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Basic (in dollars per share) $ 1.38us-gaap_EarningsPerShareBasic $ 1.17us-gaap_EarningsPerShareBasic
Effect of dilutive common stock equivalents, (in shares) 1,866,000us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment 2,566,000us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Effect of dilutive common stock equivalents, (in dollars per share) $ (0.01)rost_EffectOfDilutiveCommonStockEquivalentsEarningsPerShareAmount $ (0.02)rost_EffectOfDilutiveCommonStockEquivalentsEarningsPerShareAmount
Diluted (in shares) 205,693,000us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 211,515,000us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted (in dollars per share) $ 1.37us-gaap_EarningsPerShareDiluted $ 1.15us-gaap_EarningsPerShareDiluted