EARNINGS PER SHARE (DETAILS) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Dilutive Securities, Effect on Basic Earnings Per Share [Abstract]
Net income for basic earnings per share	$ 59,100,000	$ 45,400,000
Add: interest expense on 7.0% Convertible Senior Debentures due 2016 (the “7.0% Debentures”), net of income taxes	3,700,000	3,700,000
Net income for diluted earnings per share	62,800,000	49,100,000
Shares:
Weighted average shares outstanding for basic earnings per share	240,895,000	251,121,000
Effect of dilutive securities on weighted average shares:
7% Debentures	53,367,000	53,367,000
Stock option and restricted stock plans	2,582,000	2,748,000
Warrants	499,000	262,000
Dilutive potential common shares	56,448,000	56,377,000
Weighted average shares outstanding for diluted earnings per share	297,343,000	307,498,000
Debenture interest rate	7.00%
Conversion rate for convertible senior debentures	182.1494
Par value of each convertible senior debenture	$ 1,000
Conversion price for convertible senior debentures	$ 5.49