SUMMARY OF ACCOUNTING POLICIES - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Goodwill [Roll Forward]
Balance, beginning of the period	$ 1,342	$ 1,090
Reporting unit reallocation		0
Acquisitions		272
Acquisitions, purchase price adjustment	(2)
Foreign currency translation adjustments	3	(20)
Balance, end of the period	1,343	1,342
FAS
Goodwill [Roll Forward]
Balance, beginning of the period	371	371
Reporting unit reallocation		0
Acquisitions		0
Acquisitions, purchase price adjustment	0
Foreign currency translation adjustments	0	0
Balance, end of the period	371	371
FRS
Goodwill [Roll Forward]
Balance, beginning of the period	767	719
Reporting unit reallocation		(204)
Acquisitions		272
Acquisitions, purchase price adjustment	(2)
Foreign currency translation adjustments	3	(20)
Balance, end of the period	768	767
Nextracker
Goodwill [Roll Forward]
Balance, beginning of the period	204	0
Reporting unit reallocation		204
Acquisitions		0
Acquisitions, purchase price adjustment	0
Foreign currency translation adjustments	0	0
Balance, end of the period	$ 204	$ 204