New Accounting Guidance (Details) - USD ($) $ in Thousands	Feb. 01, 2020	Feb. 03, 2019	Feb. 02, 2019	Feb. 04, 2018	Jan. 29, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance		$ 297		$ 5,829	$ 0
Operating right-of-use assets	$ 851,990		$ 0
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating right-of-use assets		1,000,000
Operating lease liability		1,000,000
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance		(1,684)		$ 5,829	942
Retained Earnings | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance		300
Retained Earnings | Accounting Standards Update 2017-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance		(2,000)
Accumulated Other Comprehensive Loss
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance		1,981			$ (1,210)
Accumulated Other Comprehensive Loss | Accounting Standards Update 2017-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance		$ 2,000
Cost of product sales | Accounting Standards Update 2017-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance	$ 1,500