EARNINGS PER SHARE (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Dilutive Securities, Effect on Basic Earnings Per Share [Abstract]
Net income (loss)	$ 78.1	$ 77.1	$ (149.9)	$ 89.0
Add: interest expense on 7.0% Senior Debentures due 2016 (the 7.0% Debentures), net of income taxes	0	0.4	0	1.6
Net income (loss) for diluted earnings per share	$ 78.1	$ 77.5	$ (149.9)	$ 90.6
Shares:
Weighted average shares outstanding for basic earnings per share (in shares)	216,538	220,498	218,422	221,290
Effect of dilutive securities on weighted average shares:
7.0% Debentures (in shares)	0	5,692	0	11,141
Stock options, restricted stock and performance units (in shares)	2,390	2,412	0	2,620
Warrants (in shares)	3,180	2,291	0	2,129
Dilutive potential common shares (in shares)	5,570	10,395	0	15,890
Weighted average shares outstanding for diluted earnings per share (in shares)	222,108	230,893	218,422	237,180
Convertible subordinated debt
Dilutive Securities, Effect on Basic Earnings Per Share [Abstract]
Interest rate	7.00%		7.00%