Pension and retirement plans (Fair Value) (Details) - USD ($) $ in Thousands	Jul. 01, 2023	Jul. 02, 2022	Jul. 03, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 504,348	$ 638,894	$ 772,279
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,389	5,283
Common Stocks
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	138,533	219,407
Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	108,936	149,975
High yield credit and bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	90,767	109,253
U.S. government agencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	118,456	122,912
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	32,267	32,064
Level 1 | Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,389	5,283
Level 1 | Recurring | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,389	5,283
Net Asset Value | Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	488,959	633,611
Net Asset Value | Recurring | Common Stocks
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	138,533	219,407
Net Asset Value | Recurring | Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	108,936	149,975
Net Asset Value | Recurring | High yield credit and bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	90,767	109,253
Net Asset Value | Recurring | U.S. government agencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	118,456	122,912
Net Asset Value | Recurring | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 32,267	$ 32,064