SOFTWARE DEVELOPMENT COSTS AND LICENSES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2024
Capitalized software development costs and licenses
Current	$ 67.4		$ 67.4		$ 88.3
Non-current	1,904.5		1,904.5		1,446.5
Impairment of software development costs and licenses	1.5	$ 0.0	36.3	$ 21.7
Software development costs, internally developed
Capitalized software development costs and licenses
Current	48.5		48.5		53.4
Non-current	1,809.7		1,809.7		1,237.0
Software development costs, externally developed
Capitalized software development costs and licenses
Current	4.2		4.2		6.1
Non-current	59.7		59.7		198.5
Licenses
Capitalized software development costs and licenses
Current	14.7		14.7		28.8
Non-current	$ 35.1		$ 35.1		$ 11.0