CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY [Abstract]
Cumulative Preferred Stock, par	$ 100	$ 100	$ 100	$ 100	$ 100
Cumulative Preferred Stock, authorized	400,000	400,000	400,000	400,000	400,000
Cumulative Preferred Stock, issued	0	0	0	0	0
Common Stock, par	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00
Common Stock, authorized	450,000,000	450,000,000	450,000,000	450,000,000	450,000,000
Common Stock, issued	195,055,724	195,040,149	195,055,724	195,040,149	194,920,155
Cash dividends, per share	$ 0.35	$ 0.35	$ 1.40	$ 1.325	$ 1.25
Treasury stock, shares	23,021,013	17,540,636	23,021,013	17,540,636	11,513,642