Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Statement of Financial Position [Abstract]
Accounts receivable allowance	$ 33.4	$ 26.7	$ 24.0
Common stock, par value	$ 1	$ 1	$ 1
Common stock, shares authorized	320,000,000	320,000,000	320,000,000
Common stock, shares issued (including shares in treasury)	110,117,417	108,329,250	108,058,005
Treasury shares	28,148,131	27,181,512	26,992,711