CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
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	195,040,149
Cash dividends, per share	$ 0.25	$ 0.35	$ 1.20	$ 1.40	$ 1.325
Treasury stock, shares	22,853,547	23,021,013	22,853,547	23,021,013	17,540,636