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Postretirement Benefit Plans (Tables)
 3 Months Ended
Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]  
Components of Net Periodic Benefit Cost
The following table provides the components of our net periodic benefit income for our defined benefit plans, including defined benefit pension plans and other postretirement defined benefit plans:
 
 
 
Quarter Ended September 30, 2016
 
Quarter Ended October 2, 2015
 
 
Pension
 
Other
Benefits
 
Total
 
Pension
 
Other
Benefits
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(In millions)
Net periodic benefit income
 
 
 
 
 
 
 
 
 
 
 
Service cost
$
15

 
$
—

 
$
15

 
$
18

 
$
1

 
$
19

Interest cost
46

 
2

 
48

 
62

 
4

 
66

Expected return on plan assets
(85
)
 
(4
)
 
(89
)
 
(86
)
 
(5
)
 
(91
)
Amortization of net actuarial loss
—

 
—

 
—

 
—

 
2

 
2

Amortization of prior service cost
—

 
—

 
—

 
—

 
(3
)
 
(3
)
Total net periodic benefit income
$
(24
)
 
$
(2
)
 
$
(26
)
 
$
(6
)
 
$
(1
)
 
$
(7
)