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RESTRUCTURING (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Apr. 04, 2020	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 9,375	$ 10,187
NWF 1.0
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	3,700
NWF 2.0
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	5,988			$ 7,084
Restructuring charges	9,375
Minimum \| NWF 2.0
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	50,000
Maximum \| NWF 2.0
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	$ 70,000
Forecast \| NWF 2.0
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 25,000