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Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified | May 03, 2014 | Apr. 27, 2013
--- | --- | ---
Deferred tax liabilities |  |
Accelerated tax depreciation | $ 2.9 | $ 4.1
Unremitted earnings | 1.3 | 0.8
Deferred income | 1.3 | 1.1
Deferred tax liabilities | 5.5 | 6.0
Deferred tax assets |  |
Deferred compensation and stock award amortization | 8.4 | 6.1
Inventory valuation differences | 2.2 | 1.9
Property valuation differences | 2.0 | 0.8
Accelerated book amortization | 7.6 | 12.7
Environmental reserves | 1.0 | 1.1
Bad debt reserves | 0.2 | 0.2
Vacation accruals | 0.9 | 1.0
Restructuring accruals | 0.1 | 0
Foreign investment tax credit | 22.9 | 21.5
Net operating loss carryovers | 8.1 | 11.8
Foreign tax credit | 11.0 | 7.6
Research tax credits | 0.6 | 0
Other accruals | 1.9 | 1.2
Deferred tax assets, gross | 66.9 | 65.9
Less valuation allowance | 14.0 | 42.4
Total deferred tax assets | 52.9 | 23.5
Net deferred tax assets | 47.4 | 17.5
Balance sheet classification |  |
Current asset | 8.7 | 3.3
Non-current asset | 40.0 | 14.8
Current liability | (1.3) | (0.6)
Unrecognized tax benefits attributable to book to tax differences in share-based compensation | $ 5.5 |

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