Earnings Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended				9 Months Ended
	Mar. 31, 2018	Sep. 29, 2018	Mar. 31, 2018	Sep. 30, 2017	Jul. 01, 2017	Sep. 29, 2018	Sep. 28, 2018	Sep. 30, 2017	Dec. 30, 2017
Stockholders Equity Note [Line Items]
equity units issued					7,500,000
Option Indexed to Issuer's Equity, Strike Price		$ 161.96			$ 162.27	$ 161.96
Equity Unit					$ 750.0
Preferred Stock, Shares Issued					750,000
Preferred Stock, Liquidation Preference, Value					$ 750.0
Preferred Stock Conversion Rate Number Of Common Stock Shares			$ 6.1744		$ 6.1627	$ 6.1744
Document Period End Date						Sep. 29, 2018
Long-term Debt						$ 750.0
Common Stock, Par or Stated Value Per Share		$ 2.5				$ 2.5			$ 2.50
Equity Units Conversion Rate Number Of Common Stock Shares					0.7241	0.7255
Common Stock, Shares, Issued		176,902,738				176,902,738			176,902,738
Minimum [Member]
Stockholders Equity Note [Line Items]
Option Indexed to Issuer's Equity, Strike Price	$ 156.86				$ 162.27	$ 161.96	$ 156.83
Maximum [Member]
Stockholders Equity Note [Line Items]
Option Indexed to Issuer's Equity, Strike Price	$ 203.92				$ 179.53	$ 179.19	$ 203.88
Stock Options [Member]
Stockholders Equity Note [Line Items]
Antidilutive securities excluded from the computation of EPS		1,139,000		2,000		1,155,000		388,000