Financial Instruments - Effect of Derivative Instruments Designated as Cash Flow Hedges Included in AOCI on the Consolidated Balance Sheets (Detail) - Treasury locks - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative	$ 0.0
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative		$ (0.8)	$ 6.9