Income Taxes - Reconciliation of Changes in Gross Balances of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Feb. 01, 2020 |
Feb. 02, 2019 |
Feb. 03, 2018 |
|
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
| Beginning balance of unrecognized tax benefits | $ 22.5 | $ 24.9 | $ 42.1 |
| Increases related to current period tax positions | 0.4 | 1.1 | 1.0 |
| Increases related to prior period tax positions | 1.6 | 35.5 | 11.2 |
| Decreases related to prior period tax positions | (10.2) | 0.0 | 0.0 |
| Reductions as a result of a lapse of the applicable statute of limitations | (4.3) | (0.6) | (1.3) |
| Reductions as a result of settlements with taxing authorities | (3.5) | (38.4) | (28.1) |
| Ending balance of unrecognized tax benefits | $ 6.5 | $ 22.5 | $ 24.9 |