Asset Impairment and Restructuring - Additional Information (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 28, 2018 USD ($) store	Oct. 29, 2017 USD ($)	Jul. 30, 2017 USD ($)	Apr. 30, 2017 USD ($)	Jan. 29, 2017 USD ($) store	Oct. 30, 2016 USD ($)	Jul. 31, 2016 USD ($)	May 01, 2016 USD ($)	Jan. 28, 2018 USD ($) store	Jan. 29, 2017 USD ($) store	Jan. 31, 2016 USD ($) store	Aug. 20, 2017 store
Restructuring Cost and Reserve [Line Items]
Number of stores | store	404				406				404	406	363
Restructuring and related costs									$ 47,223	$ 0	$ 0
Income tax expense (recovery)	$ 137,743	$ 27,696	$ 20,813	$ 15,084	$ 61,351	$ 25,318	$ 20,912	$ 11,767	201,336	119,348	102,448
Provision for inventories									16,400	16,100	14,200
Asset impairment and restructuring costs	2,001	$ 21,007	$ 3,186	12,331	0	$ 0	$ 0	$ 0	38,525	0	0
Asset impairment for ivivva restructuring									11,593	0	$ 0
Lease termination liabilities	6,427				$ 0				6,427	$ 0
ivivva
Restructuring Cost and Reserve [Line Items]
Number of stores, not expected to close | store												7
ivivva | Facility closing
Restructuring Cost and Reserve [Line Items]
Number of stores expected to close | store												48
Number of stores | store												55
Restructuring and related costs									47,223
Income tax expense (recovery)									(12,700)
Restructuring costs recorded in cost of goods sold									8,698
Provision for inventories									4,945
Accelerated depreciation									3,753
Asset impairment and restructuring costs									38,525
Asset impairment for ivivva restructuring				$ 11,600					11,593
Employee related costs									4,226
Lease termination costs									21,069
Lease termination and other restructuring costs									1,637
Lease termination liabilities	$ 6,400								$ 6,400