EQUITY - Reclassifications and Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss)	$ 265	$ 470	$ (214)	$ 375
Accumulated Other Comprehensive Income (Loss)
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss), before tax amount	267	495	(207)	405
Other comprehensive income (loss), tax (expense) benefit	(3)	(24)	(7)	(29)
Other comprehensive income (loss)	265	470	(214)	375
Foreign Currency Translation Adjustments
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss), before tax amount	260	400	(229)	290
Other comprehensive income (loss)	260	400	(229)	290
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	(4)	1	(9)	4
Unrealized gains (losses) arising during the period, tax (expense) benefit			2
Unrealized gains (losses) arising during the period, net of tax amount	(4)	1	(7)	4
Reclassification/amortization, before tax amount	2	(1)	1	(1)
Reclassification/amortization, net of tax amount	2	(1)	1	(1)
Other comprehensive income (loss), before tax amount	(2)	1	(8)	3
Other comprehensive income (loss), tax (expense) benefit			2
Other comprehensive income (loss)	(2)	1	(6)	3
Net Change Retirement-Related Benefit Plans
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss), before tax amount	10	94	30	112
Other comprehensive income (loss), tax (expense) benefit	(3)	(24)	(9)	(29)
Other comprehensive income (loss)	7	70	21	84
Retirement-Related Benefit Plans, Net Gains (Losses)
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Unrealized gains (losses) arising during the period, before tax amount		72		67
Unrealized gains (losses) arising during the period, tax (expense) benefit		(18)		(16)
Unrealized gains (losses) arising during the period, net of tax amount		54		51
Reclassification/amortization, before tax amount	10	19	30	41
Reclassification/amortization, tax (expense) benefit	(3)	(3)	(9)	(9)
Reclassification/amortization, net of tax amount	$ 7	16	$ 21	32
Retirement-Related Benefit Plans, Curtailments and Settlements
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Unrealized gains (losses) arising during the period, before tax amount		3		3
Unrealized gains (losses) arising during the period, tax (expense) benefit		(1)		(1)
Unrealized gains (losses) arising during the period, net of tax amount		2		2
Retirement-Related Benefit Plans, Prior Service Costs (Credits)
Reclassifications and Taxes Related to Items of Other Comprehensive Income (Loss)
Unrealized gains (losses) arising during the period, before tax amount		1		1
Unrealized gains (losses) arising during the period, tax (expense) benefit		(2)		(2)
Unrealized gains (losses) arising during the period, net of tax amount		$ (1)		$ (1)