Fair Values of Financial Instruments - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 29, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amount payable annually under acquisition related contingent consideration arrangements, value, low	$ 28
Amount payable annually under acquisition related contingent consideration arrangements, value, high	$ 52
Discount Rate | Fair Value Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition related contingent consideration liability, measurement input	0.075	0.071
Distribution Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated useful life	40 years