Restructuring expenses (Textuals) (Details) $ in Thousands	3 Months Ended
	Sep. 28, 2019 USD ($) employee	Jun. 29, 2019 USD ($)
Minimum
Restructuring Cost and Reserve [Line Items]
Number of employee reductions under Severance charges | employee	200
Fiscal Year 2020 Restructuring Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 18,287
Restructuring Reserve	5,731
Fiscal Year 2020 Restructuring Liabilities | Electronic Components
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	15,100
Fiscal Year 2020 Restructuring Liabilities | Farnell
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	3,200
Fiscal Year 2019 And Prior Restructuring Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 16,608	$ 26,918