Financial Instruments - Effect of Derivative Instruments Designated as Cash Flow Hedges Included in Accumulated OCI on Condensed Consolidated Balance Sheets and Condensed Consolidated Statements of Earnings (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion of Gain Reclassified from Accumulated OCI into Income	$ 0.4	$ 0.1	$ 0.7	$ 0.2
Effective Portion of Gain Reclassified from Accumulated OCI into Income	$ 0.4	$ 0.1	0.7	$ 0.2
Treasury Locks [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion of Gain Recognized in Accumulated OCI			$ 6.1