CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 27, 2020	Dec. 28, 2019
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	176,902,738	176,902,738
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares unissued (in shares)	1,500,000	1,500,000
Preferred Stock, Shares Outstanding	1,500,000	1,500,000