REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 6,851	$ 6,266	$ 26,041	$ 24,124	$ 24,210
Point in time
Disaggregation of Revenue [Line Items]
Net sales			23,273	19,732	18,451
Over time
Disaggregation of Revenue [Line Items]
Net sales			2,768	4,392	5,759
Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales			(47)	(59)	(67)
Intersegment eliminations | Point in time
Disaggregation of Revenue [Line Items]
Net sales			(47)	(59)	(67)
Intersegment eliminations | Over time
Disaggregation of Revenue [Line Items]
Net sales			0	0	0
Operating segments
Disaggregation of Revenue [Line Items]
Net sales			26,041	24,124	24,210
FAS | Operating segments
Disaggregation of Revenue [Line Items]
Net sales			14,027	13,493	14,053
FAS | Operating segments | Point in time
Disaggregation of Revenue [Line Items]
Net sales			13,288	12,058	11,581
FAS | Operating segments | Over time
Disaggregation of Revenue [Line Items]
Net sales			739	1,435	2,472
FRS | Operating segments
Disaggregation of Revenue [Line Items]
Net sales			10,603	9,495	9,053
FRS | Operating segments | Point in time
Disaggregation of Revenue [Line Items]
Net sales			9,904	7,667	6,518
FRS | Operating segments | Over time
Disaggregation of Revenue [Line Items]
Net sales			699	1,828	2,535
Nextracker | Operating segments
Disaggregation of Revenue [Line Items]
Net sales			1,458	1,195	1,171
Nextracker | Operating segments | Point in time
Disaggregation of Revenue [Line Items]
Net sales			128	66	419
Nextracker | Operating segments | Over time
Disaggregation of Revenue [Line Items]
Net sales			$ 1,330	$ 1,129	$ 752