Benefits (Tables)
 12 Months Ended
Jun. 29, 2019
Retirement Benefits [Abstract]  
Schedule of Net Funded Status [Table Text Block]
U.S. Employees Postretirement Medical Expense & Funded Status Reconciliation

The Company provides postretirement medical expenses to certain former employees of Dallas Semiconductor and to certain Maxim Integrated executives. The Company adopted the postretirement medical plan as a result of the Company's acquisition of Dallas Semiconductor in 2001. A reconciliation of the funded status of these postretirement benefits, is as follows:
 
June 29,
2019
 
Estimated Fiscal Year 2020 Expense
 
June 30,
2018
 
Fiscal Year 2019 Expense
 
(in thousands, except percentages)
Accumulated postretirement benefit obligation (APBO):
 
 
 
 
 
 
 
Retirees and beneficiaries
$
(18,241
)
 
 
 
$
(18,023
)
 
 
Active participants
(1,437
)
 
 
 
(1,367
)
 
 
Funded status
$
(19,678
)
 
 
 
$
(19,390
)
 
 
 
 
 
 
 
 
 
 
Actuarial gain (loss)
$
118

 
 
 
$
1,279

 
 
Prior service cost
—

 
 
 
—

 
 
 
 
 
 
 
 
 
 
Amounts recognized in accumulated other comprehensive income:
 
 
 
 
 
 
 
Net actuarial loss
$
1,172

 
 
 
$
1,054

 
 
Prior service cost
606

 
 
 
962

 
 
Total
$
1,778

 
 
 
$
2,016

 
 
 
 
 
 
 
 
 
 
Net periodic postretirement benefit cost:
 
 
 
 
 
 
 
Interest cost
 
 
$
695

 
 
 
$
741

Amortization:
 
 
 
 
 
 
 
Prior service cost
 
 
356

 
 
 
356

Total net periodic postretirement benefit cost
 
 
$
1,051

 
 
 
$
1,097

 
 
 
 
 
 
 
 
Employer contributions
 
 
$
747

 
 
 
$
571

 
 
 
 
 
 
 
 
Economic assumptions:
 
 
 
 
 
 
 
Discount rate
3.6%
 
 
 
3.9%
 
 
Medical trend
7.25% - 5.0%
 
 
 
7.5%-5.0%
 
 
Schedule of Expected Benefit Payments [Table Text Block]
The following benefit payments are expected to be paid:
 
Non-Pension Benefits
Fiscal Year
(in thousands)
2020
$
747

2021
819

2022
877

2023
893

2024
948

Thereafter
15,394

Total
$
19,678