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CAPITAL STOCK (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | 2 Months Ended | 3 Months Ended | 9 Months Ended | 1 Months Ended | 2 Months Ended | 3 Months Ended | 2 Months Ended | |||||||||||||||||||||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Dec. 31, 2012
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Feb. 21, 2013
Over Allotment Option [Member]
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Feb. 21, 2013
Preferred Class A [Member]
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Sep. 30, 2013
Preferred Class A [Member]
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Sep. 30, 2013
Preferred Class A [Member]
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Sep. 09, 2013
Preferred Class A [Member]
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May 07, 2013
Preferred Class A [Member]
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Mar. 20, 2013
Preferred Class A [Member]
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Mar. 13, 2012
Common Stock [Member]
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Feb. 21, 2013
Common Stock [Member]
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Feb. 11, 2013
Common Stock [Member]
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Sep. 03, 2013
Common Stock [Member]
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Jun. 03, 2013
Common Stock [Member]
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Mar. 01, 2013
Common Stock [Member]
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Dec. 03, 2012
Common Stock [Member]
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Aug. 31, 2012
Common Stock [Member]
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Jun. 01, 2012
Common Stock [Member]
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Mar. 01, 2012
Common Stock [Member]
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Sep. 30, 2013
Common Stock [Member]
Minimum [Member]
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Sep. 30, 2013
Common Stock [Member]
Maximum [Member]
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Sep. 30, 2013
Common Stock from when Mandatory Convertible Preferred Stock Converts on February 1, 2016 [Member]
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Feb. 21, 2013
Depositary Share [Member]
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Sep. 30, 2013
Depositary Share [Member]
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Sep. 09, 2013
Depositary Share [Member]
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May 07, 2013
Depositary Share [Member]
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Mar. 20, 2013
Depositary Share [Member]
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| Class of Stock [Line Items] | ||||||||||||||||||||||||||||||
| Depositary Share Offering included in Depositary Share Issuance | 27,000,000 | |||||||||||||||||||||||||||||
| Number of Shares included in Depositary Share Issuance due to Exercise of | 2,250,000 | |||||||||||||||||||||||||||||
| Depositary Share Interest in a Share of 7% Series A Mandatory Convertible Preferred Stock, Class A | 0.025 | |||||||||||||||||||||||||||||
| Series A Mandatory Convertible Preferred Stock, Class A, Percentage | 7.00% | |||||||||||||||||||||||||||||
| Convertible Preferred Stock, Shares Issued upon Conversion | 28.1480 | 34.4840 | ||||||||||||||||||||||||||||
| Convertible Preferred Stock, Shares Issued Upon Conversion per Depositary Share | 0.7037 | |||||||||||||||||||||||||||||
| Preferred Stock, Liquidation Preference Per Share | $ 1,000 | $ 1,000 | $ 25 | |||||||||||||||||||||||||||
| Common Stock, Par or Stated Value Per Share | $ 0.125 | $ 0.125 | $ 0.125 | $ 0.125 | ||||||||||||||||||||||||||
| Trading Day Window Determining Number of Common Shares Issuable on Conversion | 20 | |||||||||||||||||||||||||||||
| Number of Common Shares Mandatory Convertible Stock Converts to on February 1, 2016 | 20,600,000 | 25,200,000 | ||||||||||||||||||||||||||||
| Net proceeds from issuance of Series A, Mandatory Convertible Preferred Stock, Class A | $ 709.4 | $ 0 | ||||||||||||||||||||||||||||
| Dividends payable, per share | $ 17.50 | $ 17.50 | $ 13.6111 | $ 0.150 | $ 0.15 | $ 0.15 | $ 0.625 | $ 0.625 | $ 0.625 | $ 0.28 | $ 0.44 | $ 0.44 | $ 0.34 | |||||||||||||||||
| Dividends, Preferred Stock | 12.9 | 0 | 35.9 | 0 | 12.9 | 35.9 | ||||||||||||||||||||||||
| Percentage increase (decrease) in dividends payable | 123.00% | 76.00% | ||||||||||||||||||||||||||||
| Issuance of common shares, public offering (in shares) | 731,250 | 10,350,000 | 29,250,000 | |||||||||||||||||||||||||||
| Common shares, issued (in shares) | 159,545,469 | 159,545,469 | 149,195,469 | 1,350,000 | 9,000,000 | |||||||||||||||||||||||||
| Net proceeds from issuance of common shares | $ 285.3 | $ 0 | ||||||||||||||||||||||||||||
| Closing price per share (in usd per share) | $ 25 | $ 29.00 | ||||||||||||||||||||||||||||