Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020	Dec. 31, 2020
Financial Instruments and Fair Value [Line Items]
Available-for-sale securities, realized gain	$ 0.5	$ 1.1	$ 2.6	$ 4.1
Available-for-sale securities, realized loss	0.0	0.1	0.0	0.3
Aggregate loss of investments with unrealized losses greater than one year	6.2		6.2
Fair market value of investments with unrealized losses less than one year	57.3		57.3		$ 70.4
Unrealized Gain (loss) on contracts	1.0	1.2	1.3	0.4
Equity securities unrealized gain		$ 2.0	3.3	5.7
Equity securities unrealized loss	0.4		1.1	$ 6.0
Debt Mutual Funds
Financial Instruments and Fair Value [Line Items]
Available for sale securities with out contractual maturity date	$ 8.9		8.9
Foreign Exchange Contracts
Financial Instruments and Fair Value [Line Items]
Unrealized Gain (loss) on contracts			$ 181.8		$ 152.9

Financial Instruments and Fair Value [Line Items]

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- Definition

Foreign Currency Transaction Gain, Unrealized

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Foreign Currency Transaction (Loss), Unrealized

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- Definition

This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

+ References

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- Definition

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), without single maturity date and not allocated over maturity grouping.

+ References

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- Definition

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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- Definition

Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement.

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