Weighted-Average Stock Options and Warrants Outstanding Not included in Computation of Diluted Shares Outstanding (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017	Dec. 30, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Long-term Debt	$ 3,810.1		$ 3,810.1		$ 3,805.7
Preferred Stock Par Value Per Share	$ 2.5		$ 2.5		$ 2.50
Debt instrument, face amount	$ 3,840.0		$ 3,840.0
Payments for Repurchase of Common Stock	$ 201.3	$ 2.1	$ 212.7	$ 15.6
Common Stock, Shares, Issued	176,902,738		176,902,738		176,902,738
Equity Units Conversion Rate Number Of Common Stock Shares		0.7241	0.7251