ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Cash and Cash Equivalents, Concentrations of Risk, Financial Instruments, Financing Receivables and Operating Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
CASH AND CASH EQUIVALENTS [Abstract]
Amounts held in trust for third party recipients	$ 0.7	$ 0.0
Minimum [Member]
FINANCING RECEIVABLES AND OPERATING LEASES [Abstract]
Financing receivables and operating leases term	2 years
Financing receivables and operating leases, term range	3 years
Estimated useful life	3 years
Maximum [Member]
FINANCING RECEIVABLES AND OPERATING LEASES [Abstract]
Financing receivables and operating leases term	6 years
Financing receivables and operating leases, term range	4 years
Estimated useful life	7 years
Information Technology Equipment [Member]
FINANCING RECEIVABLES AND OPERATING LEASES [Abstract]
Estimated useful life	4 years
Carrying Amount [Member]
FINANCIAL INSTRUMENTS [Abstract]
Notes receivable	$ 112.6	54.8
Carrying Amount [Member] | Recourse [Member]
FINANCIAL INSTRUMENTS [Abstract]
Notes payable	18.1	37.3
Carrying Amount [Member] | Non-recourse [Member]
FINANCIAL INSTRUMENTS [Abstract]
Notes payable	56.1	35.5
Fair Value [Member]
FINANCIAL INSTRUMENTS [Abstract]
Notes receivable	113.2	55.4
Fair Value [Member] | Recourse [Member]
FINANCIAL INSTRUMENTS [Abstract]
Notes payable	18.1	37.3
Fair Value [Member] | Non-recourse [Member]
FINANCIAL INSTRUMENTS [Abstract]
Notes payable	$ 56.3	$ 35.5
Accounts Receivable-Trade [Member] | Customer Concentration Risk [Member] | Verizon Communications Inc. [Member] | Technology Segment [Member]
CONCENTRATIONS OF RISK [Abstract]
Percentage of concentration risk	20.00%	20.00%
Net Sales [Member] | Customer Concentration Risk [Member] | Verizon Communications Inc. [Member] | Technology Segment [Member]
CONCENTRATIONS OF RISK [Abstract]
Percentage of concentration risk	19.00%	15.00%
Net Sales [Member] | Product Concentration Risk [Member] | Cisco Systems [Member] | Technology Segment [Member]
CONCENTRATIONS OF RISK [Abstract]
Percentage of concentration risk	36.00%	40.00%	42.00%