REVENUES - Remaining Performance Obligation (Percentage and Period) (Details)	Jun. 30, 2018
Equipment | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied (as a percent)	53.00%
Performance obligations expected to be satisfied, expected timing	1 year
Equipment | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied (as a percent)	71.00%
Performance obligations expected to be satisfied, expected timing	2 years
Equipment | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied (as a percent)	93.00%
Performance obligations expected to be satisfied, expected timing	5 years
Services Revenues | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied (as a percent)	17.00%
Performance obligations expected to be satisfied, expected timing	1 year
Services Revenues | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied (as a percent)	54.00%
Performance obligations expected to be satisfied, expected timing	5 years
Services Revenues | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied (as a percent)	77.00%
Performance obligations expected to be satisfied, expected timing	10 years
Services Revenues | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2032-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied (as a percent)	88.00%
Performance obligations expected to be satisfied, expected timing	15 years