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CASH FLOW INFORMATION (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | May. 01, 2015 | Feb. 02, 2015 | Nov. 03, 2014 | Aug. 01, 2014 | May. 01, 2014
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock cash dividend | $ 0.0 | $ 12.8 | $ 12.8 | $ 25.6 |  |  |  |  |
Preferred Class A [Member] |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |
Dividends payable, per share |  |  |  |  | $ 17.50 | $ 17.50 | $ 17.50 | $ 17.50 | $ 17.50
Preferred stock cash dividend | $ 0.0 | $ 12.8 | $ 12.8 | $ 25.6 |  |  |  |  |
Depositary Share [Member] |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |
Dividends payable, per share |  |  |  |  | $ 0.44 | $ 0.44 | $ 0.440 | $ 0.440 | $ 0.440

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