Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowances, accounts receivable	$ 31.5	$ 39.4
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	320,000,000	320,000,000
Common stock, shares issued, including treasury shares	106,405,449	105,647,040
Treasury stock, shares	10,345,141	8,522,425