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SUMMARY OF ACCOUNTING POLICIES - Goodwill (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) segment	Mar. 31, 2022 USD ($) segment	Mar. 31, 2021 USD ($)	Dec. 01, 2021 USD ($)
Goodwill [Line Items]
Number of reportable segments \| segment	3	3
Number of operating segments \| segment	3	3
Goodwill	$ 1,342	$ 1,342	$ 1,090
Activity in goodwill account
Balance, beginning of the period		1,090	1,065
Divestitures			(1)
Reporting unit reallocation		0
Acquisitions		272
Foreign currency translation adjustments		(20)	26
Balance, end of the period	1,342	1,342	1,090
Anord Mardix
Goodwill [Line Items]
Goodwill				$ 272
Activity in goodwill account
Balance, beginning of the period	272
FAS
Goodwill [Line Items]
Goodwill	371	371	371
Activity in goodwill account
Balance, beginning of the period		371	370
Divestitures			0
Reporting unit reallocation		0
Acquisitions		0
Foreign currency translation adjustments		0	1
Balance, end of the period	371	371	371
FRS
Goodwill [Line Items]
Goodwill	767	767	719
Activity in goodwill account
Balance, beginning of the period		719	695
Divestitures			(1)
Reporting unit reallocation		(204)
Acquisitions		272
Foreign currency translation adjustments		(20)	25
Balance, end of the period	767	767	719
Nextracker
Goodwill [Line Items]
Goodwill	204	204	0
Activity in goodwill account
Balance, beginning of the period		0	0
Divestitures			0
Reporting unit reallocation		204
Acquisitions		0
Foreign currency translation adjustments		0	0
Balance, end of the period	$ 204	$ 204	$ 0