CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Common stock, par value		$ 1.25	$ 1.25
Common stock, shares issued		112,888,126	112,499,874	112,405,302	112,357,348
Treasury stock, shares	[1]	32,434,274	32,324,911	32,310,937	31,697,498

[1] The Company repurchases shares in connection with the issuance of shares under stock-based compensation programs and in accordance with Board authorized share repurchase programs.