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Postretirement Benefit Plans (Tables)
 3 Months Ended
Apr. 03, 2020
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Cost
The following tables provide 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 April 3, 2020
 
Pension
 
Other Benefits
 
 
 
 
 
(In millions)
Net periodic benefit income
 
 
 
Service cost
$
16

 
$
—

Interest cost
69

 
2

Expected return on plan assets
(158
)
 
(5
)
Amortization of net actuarial loss
2

 
—

Amortization of prior service credit
(7
)
 
—

Contractual termination benefits(1)
1

 
—

Net periodic benefit income
$
(77
)
 
$
(3
)

_______________
(1)
Contractual termination benefits related to facility rationalization as part of restructuring activities in connection with the L3Harris Merger integration. See Note E — Restructuring and Other Exit Costs in these Notes for additional information regarding restructuring activities.
 
Quarter Ended March 29, 2019
 
Pension
 
Other Benefits
 
 
 
 
 
(In millions)
Net periodic benefit income
 
 
 
Service cost
$
9

 
$
1

Interest cost
52

 
2

Expected return on plan assets
(95
)
 
(4
)
Amortization of net actuarial gain
—

 
(2
)
Net periodic benefit income
$
(34
)
 
$
(3
)