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DEBT Senior Unsecured Notes (Tables) | 6 Months Ended
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Jun. 30, 2018
Senior Notes 2016 [Member] |
Debt Instrument [Line Items] |
Schedule of Debt [Table Text Block] |
Senior Notes 2015 [Member] |
Debt Instrument [Line Items] |
Schedule of Debt [Table Text Block] |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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