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DEBT Senior Unsecured Notes (Tables)	6 Months Ended
	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.

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