EQUITY - Reclassifications and Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss)	$ (105)	$ (214)	$ (104)	$ (478)
Accumulated Other Comprehensive Income (Loss)
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss), before tax amount	(101)	(211)	(100)	(474)
Other comprehensive income (loss), tax (expense) benefit	(3)	(3)	(5)	(4)
Other comprehensive income (loss)	(105)	(214)	(104)	(478)
Foreign Currency Translation Adjustments
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss), before tax amount	(109)	(221)	(125)	(488)
Other comprehensive income (loss)	(109)	(221)	(125)	(488)
Unrealized Gains (Losses) on Cash Flow Hedges
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Unrealized gains (losses) arising during the period, before tax amount	11		26	(5)
Unrealized gains (losses) arising during the period, tax (expense) benefit	(4)		(5)	2
Unrealized gains (losses) arising during the period, net of tax amount	7		21	(3)
Reclassification/amortization, before tax amount	(4)		(5)	(1)
Reclassification/amortization, tax (expense) benefit	1		1
Reclassification/amortization, net of tax amount	(3)		(4)	(1)
Other comprehensive income (loss), before tax amount	7		21	(6)
Other comprehensive income (loss), tax (expense) benefit	(3)		(4)	2
Other comprehensive income (loss)	4		17	(4)
Net Change Retirement-Related Benefit Plans
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss), before tax amount	1	10	4	20
Other comprehensive income (loss), tax (expense) benefit		(3)	(1)	(6)
Other comprehensive income (loss)	1	$ 7	3	$ 14
Retirement-Related Benefit Plans, Prior Service Costs (Credits)
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Reclassification/amortization, before tax amount			1
Reclassification/amortization, net of tax amount			1
Retirement-Related Benefit Plans, Net Gains (Losses)
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Reclassification/amortization, before tax amount	1		3
Reclassification/amortization, tax (expense) benefit			(1)
Reclassification/amortization, net of tax amount	$ 1		$ 2