SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, RISKS AND UNCERTAINTIES - Self-Insurance (Details) $ in Millions	6 Months Ended
Mar. 31, 2019 USD ($)
Minimum
Risk or uncertainty
Insurance coverage deductibles range for claims which occur outside or inside the United States	$ 1
Maximum
Risk or uncertainty
Insurance coverage deductibles range for claims which occur outside or inside the United States	$ 5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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