Effective income tax rate reconciliation at federal blended income tax rate.

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- Definition

Income tax expense (benefit) due to reduction in capital loss valuation reserve.

+ References

No definition available.

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Income tax expense (benefit) due to valuation allowance release.

+ References

No definition available.

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- Definition

Income taxes.

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No definition available.

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Remeasurement of deferred tax assets and liabilities based percentage at which expected to reverse in future.

+ References

No definition available.

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- Definition

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).

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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions			3 Months Ended			6 Months Ended		9 Months Ended
	Dec. 22, 2017	Dec. 21, 2017	Mar. 30, 2018	Dec. 29, 2017	Mar. 31, 2017	Mar. 30, 2018	Mar. 31, 2017	Sep. 28, 2018
Income Taxes [Line Items]
U.S. federal corporate tax rate	21.00%	35.00%		35.00%
Recognized provisional amount as component of income tax expense from continuing operations due to change in tax rate						$ 48.6
Remeasurement of deferred tax assets and liabilities based on rate at which expected to reverse in future						21.00%
Provisional amount recorded related to remeasurement of deferred tax balance						$ 6.6
Provisional amount for one-time transition tax liability resulting in increase in income tax expense due to foreign tax effects						$ 42.0
Blended U.S. tax rate			24.50%
Unrecognized tax benefit reasonably possible to be recognized by the end of fiscal 2018				$ 1.0
Scenario, Forecast
Income Taxes [Line Items]
U.S. federal corporate tax rate								21.00%
Adjustments for New Accounting Pronouncement \| Adjustments for New Accounting Principle, Early Adoption
Income Taxes [Line Items]
Income tax rate			7.90%		27.20%		18.30%
Adjustments for New Accounting Pronouncement \| Adjustments for New Accounting Principle, Early Adoption \| France
Income Taxes [Line Items]
Discrete tax benefits related to valuation allowance release							$ 5.4
Adjustments for New Accounting Pronouncement \| Adjustments for New Accounting Principle, Early Adoption \| After Effect of Tax Cuts and Jobs Act
Income Taxes [Line Items]
Income tax rate						122.70%
Adjustments for New Accounting Pronouncement \| Adjustments for New Accounting Principle, Early Adoption \| Elastomer Business
Income Taxes [Line Items]
Tax benefit from reduction of a capital loss valuation reserve			$ 4.7			$ 4.7