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Postretirement Benefit Plans (Tables)
9 Months Ended
Oct. 01, 2021
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 October 1, 2021Three Quarters Ended October 1, 2021
(In millions)PensionOther BenefitsPensionOther Benefits
Net periodic benefit income
Service cost$16 $$52 $
Interest cost47 139 
Expected return on plan assets(155)(5)(467)(15)
Amortization of net actuarial loss— 26 — 
Amortization of prior service credit (cost)(7)(21)
Net loss from curtailments and settlements— — 
Net periodic benefit income$(85)$(2)$(267)$(8)

Quarter Ended October 2, 2020Three Quarters Ended October 2, 2020
(In millions)PensionOther BenefitsPensionOther Benefits
Net periodic benefit income
Service cost$17 $— $49 $
Interest cost68 205 
Expected return on plan assets(158)(5)(473)(15)
Amortization of net actuarial loss (gain)(1)(2)
Amortization of prior service credit(7)— (21)— 
Contractual termination cost(1)
— — — 
Net periodic benefit income$(78)$(3)$(232)$(9)
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(1)For the three quarters ended October 2, 2020, includes contractual termination benefits related to facility rationalization as part of restructuring activities in connection with the L3Harris Merger integration. See Note 4: “Restructuring and Other Exit Costs” in the Notes to Consolidated Financial Statements in our Fiscal 2020 Form 10-K for further information.