EQUITY - AOCI Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the beginning of the period	$ 2,211	$ 4,932	$ 2,711	$ 4,902
Net transfers from Parent		1,414		1,816
Other comprehensive income (loss), net of tax	(214)	(115)	(478)	(94)
Balance at the end of the period	1,746	5,539	1,746	5,539
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the beginning of the period	(1,353)	(1,161)	(1,089)	(1,182)
Net transfers from Parent		(338)		(338)
Other comprehensive income (loss), net of tax	(214)	(115)	(478)	(94)
Balance at the end of the period	(1,567)	(1,614)	(1,567)	(1,614)
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the beginning of the period	(1)		3
Other comprehensive income (loss), net of tax		3	(4)	3
Balance at the end of the period	(1)	3	(1)	3
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the beginning of the period	(1,002)	(957)	(735)	(974)
Other comprehensive income (loss), net of tax	(221)	(127)	(488)	(110)
Balance at the end of the period	(1,223)	(1,084)	(1,223)	(1,084)
Net Change Retirement-Related Benefit Plans
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the beginning of the period	(350)	(204)	(357)	(208)
Net transfers from Parent		(338)		(338)
Other comprehensive income (loss), net of tax	7	8	14	13
Balance at the end of the period	$ (343)	$ (534)	$ (343)	$ (534)