FINANCIAL ASSETS AND LIABILITIES - Effect of Hedge Activity on Income and Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Cost of services	$ 3,677	$ 4,162
Selling, general and administrative expenses	694	714
Other expense (income)	(3)	$ 11
Cost of services.
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) from Hedge Activity	1
Other expenses
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) from Hedge Activity	$ (2)