SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
SIGNIFICANT ACCOUNTING POLICIES
Payment due period from receipt of invoice, per standard billing terms	30 days
Contract assets	$ 30	$ 30
Unbilled accounts receivable	$ 377	$ 384
Practical expedient, financing components	true
Minimum | Services
SIGNIFICANT ACCOUNTING POLICIES
Contract term, low end of range	1 year
Maximum | Services
SIGNIFICANT ACCOUNTING POLICIES
Contract term, high end of range	10 years