Condensed Consolidated Balance Sheets (Parenthetical)		6 Months Ended
		Jul. 01, 2017 $ / shares shares		Dec. 31, 2016 $ / shares shares
Statement of Financial Position [Abstract]
Common shares, par value | $ / shares		$ 1.00		$ 1.00
Common shares, authorized		48,000,000		48,000,000
Common shares, issued	[1]	36,183,000		35,857,000
Temporary Equity, Shares Outstanding		6,731,000		7,057,000
Common shares, outstanding		36,183,000	[1]	35,857,000
Common shares held in treasury	[1]	18,336,000		17,990,000
Stock split, conversion ratio		2

[1] Adjusted for two-for-one stock split