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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 |  |  |

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