CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY [Abstract]
Cumulative Preferred Stock, par value (per share)	$ 100	$ 100	$ 100	$ 100		$ 100
Cumulative Preferred Stock, authorized shares	400,000	400,000	400,000	400,000		400,000
Cumulative Preferred Stock, shares issued	0	0	0	0		0
Common Stock, par value (per share)	$ 1.00	$ 1.00	$ 1.00	$ 1.00		$ 1.00
Common Stock, authorized shares	450,000,000	450,000,000	450,000,000	450,000,000		450,000,000
Common Stock, shares issued	195,055,724	195,055,724	195,055,724	195,055,724		195,055,724
Cash dividends per Common share	$ 0.25	$ 0.25	$ 1.00	$ 1.20	[1]	$ 1.40	[1]
Treasury stock, shares	22,482,851	22,853,547	22,482,851	22,853,547		23,021,013

[1] Reclassified to conform to current presentation (see Note A).