Ulta Beauty, Inc. Annual report pursuant to Section 13 and 15(d)

Stock Repurchase Program - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014	Mar. 12, 2015	Sep. 11, 2014
Stock Repurchase Program [Line Items]
Repurchase of common stock	$ 167,396,000	$ 39,923,000	$ 37,337,000
2013 Share Repurchase Program [Member]
Stock Repurchase Program [Line Items]
Shares authorized but unused amount revoked					$ 112,664,000
Repurchase of common stock, shares			501
Repurchase of common stock			$ 37,337,000
Repurchase of common stock, average price per share			$ 74.58
2013 Share Repurchase Program [Member] \| Maximum [Member]
Stock Repurchase Program [Line Items]
Repurchase of common stock authorized amount			$ 150,000,000
2014 Share Repurchase Program [Member]
Stock Repurchase Program [Line Items]
Repurchase of common stock, shares	1,034	321
Repurchase of common stock	$ 167,396,000	$ 39,923,000
Repurchase of common stock, average price per share	$ 161.81	$ 124.31
2014 Share Repurchase Program [Member] \| Maximum [Member]
Stock Repurchase Program [Line Items]
Repurchase of common stock authorized amount		$ 300,000,000
Stock repurchase program, increase in authorized amount				$ 100,000,000