Restructuring expenses (Textuals) (Details) $ in Thousands	6 Months Ended
	Dec. 29, 2018 USD ($) employee	Jun. 30, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of employee reductions under Severance charges | employee	160
Fiscal Year 2019 Restructuring Liabilities Member
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 63,172
Restructuring Reserve	11,908
Fiscal Year 2019 Restructuring Liabilities Member | Electronic Components
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	62,400
Fiscal Year 2019 Restructuring Liabilities Member | Premier Farnell
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	500
Fiscal Year 2019 Restructuring Liabilities Member | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	300
Fiscal Year 2018 And Prior Restructuring Liabilities Member
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 7,911	$ 29,224