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Share-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Jan. 08, 2021
Mar. 05, 2019
Feb. 26, 2014
Jan. 30, 2022
Jan. 31, 2021
Jan. 26, 2020
Jan. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Aggregate unrecognized compensation for stock options       $ 0.2      
Number of shares authorized per the equity incentive plan       17,031,653      
Options granted (in shares)       0 0    
Share Price       $ 67.83      
Total Stockholder Return Market Condition Restricted Stock Units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Period over which aggregate unrecognized compensation will be recognized       1 year 2 months 12 days      
Weighted average fair value units granted (in dollars per share)       $ 76.52      
Aggregate unrecognized compensation       $ 3.9      
Stock units granted (in shares)       81,688 137,224 266,000  
Total number of unvested shares (in shares)       138,000 203,000    
Shares vested (in shares)       16,011      
Market performance RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Weighted average fair value units granted (in dollars per share)       $ 49.55      
Minimum closing share price used to determine market condition (usd per share)       $ 95.00      
Stock units granted (in shares)       54,928      
Performance period       30 days      
Performance-based RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Percentage of award that will vest upon satisfaction of performance condition             180.80%
Total number of unvested shares (in shares)       0      
Vested in period, fair value           $ 9.3  
Stock options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Period over which aggregate unrecognized compensation will be recognized       6 months      
Employee stock unit awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period       4 years      
Aggregate unrecognized compensation for stock options       $ 88.5      
Period over which aggregate unrecognized compensation will be recognized       2 years 6 months      
Weighted average fair value units granted (in dollars per share)       $ 67.91      
Stock units granted (in shares)       755,000      
Total number of unvested shares (in shares)       1,902,000 2,059,000    
Shares vested (in shares)       805,000      
Minimum | Stock options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period       3 years      
Maximum | Stock options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period       4 years      
Contractual term of equity share options       10 years      
Subject to share settlement | Performance-based RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares vested (in shares)           187,116  
Subject to cash settlement | Performance-based RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares vested (in shares)           187,116  
Subject to cash settlement | Non-employee director stock unit awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period       1 year      
Tranche One | Total Stockholder Return Market Condition Restricted Stock Units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance period       1 year      
Weighted average fair value units granted (in dollars per share)       $ 67.41      
Tranche Two | Total Stockholder Return Market Condition Restricted Stock Units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance period       2 years      
Weighted average fair value units granted (in dollars per share)       $ 77.99      
Tranche Three | Total Stockholder Return Market Condition Restricted Stock Units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance period       3 years      
Weighted average fair value units granted (in dollars per share)       $ 84.17      
Vesting January 31, 2021 | Total Stockholder Return Market Condition Restricted Stock Units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Awards expected to vest (in share)       140,416      
Employees | Tranche Two | Market performance RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Minimum closing share price used to determine market condition (usd per share)       $ 95.00      
Employees | Tranche Three | Minimum | Market performance RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Minimum closing share price used to determine market condition (usd per share)       $ 71.00      
Chief Executive Officer | Market performance RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock units granted (in shares)   320,000          
Chief Executive Officer | Tranche One | Market performance RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Weighted average fair value units granted (in dollars per share)   $ 44.32          
Share-based compensation, terms of award     The award is eligible to vest during the period commencing February 26, 2014 and ending February 26, 2019 (the “Performance Period”) as follows: 30% of the restricted stock units covered by the award will vest if, during any consecutive 120 calendar day period that commences and ends during the Performance Period, the average per-share closing price of the Company’s common stock equals or exceeds $35.00 (“Tranche 1”) and the award will vest in full if, during any consecutive 120 calendar day period that commences and ends during the Performance Period, the average per-share closing price of the Company’s common stock equals or exceeds $40.00 (“Tranche 2”). The award will also vest if a majority change in control of the Company occurs during the Performance Period and, in connection with such event, the Company’s stockholders become entitled to receive per-share consideration having a value equal to or greater than $40.00.        
Percentage of award that will vest upon satisfaction of performance condition   30.00%          
Award performance period   30 days          
Minimum closing share price used to determine market condition (usd per share)   $ 71.00          
Shares vested (in shares) 96,000            
Chief Executive Officer | Tranche Two | Market performance RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Weighted average fair value units granted (in dollars per share)   $ 33.19          
Percentage of award that will vest upon satisfaction of performance condition     100.00%        
Award performance period   30 days          
Minimum closing share price used to determine market condition (usd per share)   $ 95.00          
Chief Executive Officer | Tranche Three | Market performance RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Percentage of award that will vest upon satisfaction of performance condition   30.00%          
Chief Executive Officer | Tranche Three | Minimum | Market performance RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Minimum closing share price used to determine market condition (usd per share)   $ 71.00          
Chief Executive Officer | Tranche Three | Maximum | Market performance RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Minimum closing share price used to determine market condition (usd per share)   $ 95.00          
Non-employee director stock unit awards | Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period       1 year      
Weighted average fair value units granted (in dollars per share)       $ 68.06      
Share-based compensation liability, long-term       $ 11.5      
Stock units granted (in shares)       24,000      
Total number of unvested shares (in shares)       24,000 28,000    
Shares vested and unsettled (in shares)       174,414      
Shares vested (in shares)       28,000      
Non-employee director stock unit awards | Subject to share settlement | Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock units granted (in shares)       12,000      
Total number of unvested shares (in shares)       12,000 13,000    
Shares vested (in shares)       13,000      
Non-employee director stock unit awards | Subject to cash settlement | Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock units granted (in shares)       12,000      
Total number of unvested shares (in shares)       12,000 15,000    
Shares vested (in shares)       15,000