Inventories - Schedule of Inventories by Major Classification (Detail) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019
Inventory Disclosure [Abstract]
Finished goods	$ 664.8	$ 661.0
Work in progress	59.3	57.1
Raw materials	124.5	126.8
Total FIFO value	848.6	844.9
Excess of current cost over LIFO cost	(84.2)	(84.5)
Total inventories – net	$ 764.4	$ 760.4

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods.

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