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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
Mar. 30, 2019
Sep. 29, 2018
Jun. 30, 2018
Mar. 31, 2018
Jul. 01, 2017
Dec. 29, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Long-term Debt $ 3,912.5         $ 3,822.3
Preferred Stock Par Value Per Share $ 2.5         $ 2.50
Debt instrument, face amount $ 3,954.3          
Payments for Repurchase of Common Stock $ 8.1 $ 300.0 $ 200.0 $ 11.4    
Common Stock, Shares, Issued 176,902,738         176,902,738
Equity Units Conversion Rate Number Of Common Stock Shares 0.7264       0.7241