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CAPITAL STOCK (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Nov. 02, 2015 | Aug. 03, 2015 | May. 01, 2015 | Feb. 02, 2015 | Dec. 01, 2014 | Nov. 03, 2014 | Sep. 02, 2014 | Aug. 01, 2014 | Jun. 03, 2014 | May. 01, 2014 | Mar. 03, 2014
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends, Preferred Stock |  | $ 25.6 | $ 12.8 | $ 38.4 | $ 38.4 |  |  |  |  |  |  |  |  |  |  |
Elimination of Dividend |  | $ 0.15 |  | $ 0.15 |  |  |  |  |  |  |  |  |  |  |  |
Free Cash Flow Due to Quarterly Dividend Elimination |  | $ 92.0 |  | $ 92.0 |  |  |  |  |  |  |  |  |  |  |  |
Preferred Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, per share |  |  |  |  |  |  | $ 17.50 | $ 17.50 | $ 17.50 |  | $ 17.50 |  | $ 17.50 |  | $ 17.50 |
Dividends, Preferred Stock |  | $ 25.6 | $ 12.8 | $ 38.4 | $ 38.4 |  |  |  |  |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, per share |  |  |  |  |  |  |  |  |  | $ 0.15 |  | $ 0.150 |  | $ 0.150 |  | $ 0.150
Depositary Share [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, per share |  |  |  |  |  |  | $ 0.44 | $ 0.440 | $ 0.44 |  | $ 0.440 |  | $ 0.440 |  | $ 0.440 |
Dividend Declared [Member] | Preferred Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, per share |  |  |  |  |  | $ 17.50 |  |  |  |  |  |  |  |  |  |
Dividends, Preferred Stock | $ 12.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend Declared [Member] | Depositary Share [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, per share |  |  |  |  |  | $ 0.44 |  |  |  |  |  |  |  |  |  |

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