CONSOLIDATED BALANCE SHEET (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.125	$ 0.125
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	128,526,137	115,858,190
Common stock, shares outstanding	106,619,202	78,947,381
Treasury stock, shares at cost	21,906,935	36,910,809