INVESTMENT IN NUSTAR ENERGY Narrative 3 (Details) $ in Millions	3 Months Ended
Dec. 31, 2016 USD ($)
Equity Method Investments and Joint Ventures [Abstract]
Gain related to NuStar Energy's issuance of common units for unit-based compensation vestings	$ 0.3

Equity Method Investment Gain (Loss) resulting from Unit Issuances for Unit Based Compensation Vestings

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration