RESTRUCTURING CHARGES - Narratives (Details) $ in Millions	12 Months Ended
	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
RESTRUCTURING CHARGES
Number of reportable segments | segment	2
Restructuring charges	$ 101.0	$ 216.4	$ 113.0
Cost of sales
RESTRUCTURING CHARGES
Restructuring charges			99.0
Employee Severance
RESTRUCTURING CHARGES
Restructuring charges	101.3	159.3
Long-Lived Asset Impairment
RESTRUCTURING CHARGES
Restructuring charges	$ 8.0	46.0	46.0
Long-Lived Asset Impairment | Cost of sales
RESTRUCTURING CHARGES
Restructuring charges			113.3
Non-Cash Charges
RESTRUCTURING CHARGES
Restructuring charges		$ 57.1
Non-Cash Charges | Long-Lived Asset Impairment
RESTRUCTURING CHARGES
Restructuring charges			66.0
Non-Cash Charges | Long-Lived Asset Impairment | Cost of sales
RESTRUCTURING CHARGES
Restructuring charges			$ 73.2