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Income Taxes - Significant Components of Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Dec. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred income tax assets: |  |
Accounts receivable and inventory valuation allowances | $ 5.9 | $ 17.2
Deferred compensation accruals | 8.9 | 9.0
Accrued pension expense | 33.9 | 53.7
Stock-based compensation | 16.7 | 22.6
Net operating loss and foreign tax credit carryforwards | 15.1 | 9.7
Book over tax depreciation and amortization | 0.0 | 2.0
Tenant lease expenses | 3.2 | 5.0
Environmental reserve | 7.9 | 0.0
Other | 10.4 | 9.3
Total gross deferred income tax assets | 102.0 | 128.5
Less valuation allowance | (14.5) | (11.5)
Net deferred income tax assets | 87.5 | 117.0
Deferred income tax liabilities: |  |
Tax over book depreciation and amortization | (6.3) | 0.0
Intangible assets | (155.3) | (270.5)
Other | (5.8) | (5.2)
Total deferred income tax liabilities | 167.4 | 275.7
Total deferred income tax liabilities | $ (79.9) | $ (158.7)

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