REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 27, 2019	Jun. 28, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 28, 2018	Jun. 29, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 5,484,490	$ 6,461,387	$ 6,088,054	$ 6,175,939	$ 6,226,124	$ 6,922,827	$ 6,662,604	$ 6,398,956	$ 24,209,870	$ 26,210,511	$ 25,441,131
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales									18,450,509	19,040,873
Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales									5,759,361	7,169,638
HRS
Disaggregation of Revenue [Line Items]
Net sales									4,742,424	4,828,950
HRS | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales									3,705,387	3,773,735
HRS | Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales									1,037,037	1,055,215
IEI
Disaggregation of Revenue [Line Items]
Net sales									7,277,350	6,182,637
IEI | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales									5,045,270	4,395,773
IEI | Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales									2,232,080	1,786,864
CEC
Disaggregation of Revenue [Line Items]
Net sales									6,985,669	8,336,330
CEC | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales									5,503,322	6,126,454
CEC | Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales									1,482,347	2,209,876
CTG
Disaggregation of Revenue [Line Items]
Net sales									5,204,427	6,862,594
CTG | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales									4,196,530	4,744,911
CTG | Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales									$ 1,007,897	$ 2,117,683