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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 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Interest Expense [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Effective Portion of Gain Reclassified from Accumulated OCI into Income $ 0.5 $ 0.1 $ 1.2 $ 0.3
Treasury Locks [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Effective Portion of Gain Recognized in Accumulated OCI     $ 6.1