Stock-Based Compensation - Summary of Equity Award Transactions 2 (Details) shares in Thousands	9 Months Ended
	Oct. 28, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of PSUs issuable (in shares)	300
Maximum number of market-based PSUs issuable (in shares)	45
Market-based PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement period	3 years