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EMPLOYEE BENEFITS
9 Months Ended
Sep. 30, 2017
EMPLOYEE BENEFITS  
EMPLOYEE BENEFITS

14. Employee Benefits

We sponsor various defined benefit pension plans, post-retirement medical and life insurance plans for eligible employees and retirees in the U.S. and certain non-U.S. countries.

The following table presents the components of net periodic benefit cost with respect to pensions and other postretirement benefits:

Pension Postretirement
U.S.Non-U.S.U.S.Non-U.S.
(in millions)PlansPlansTotalPlansPlansTotal
Three Months Ended September 30, 2017
Components of net periodic benefit cost:
Service cost$(5)$7$2$-$1$1
Interest cost41445213
Expected return on assets(66)(6)(72)---
Amortization of prior service credit------
Amortization of net (gain) loss639---
Curtailment gain-(5)(5)---
Settlement (Credit)/Charges50-50---
Net periodic benefit cost (credit)$26$3$29$2$2$4
Three Months Ended September 30, 2016
Components of net periodic benefit cost:
Service cost$6$8$14$1$-$1
Interest cost455502-2
Expected return on assets(72)(7)(79)---
Amortization of prior service credit---(2)-(2)
Amortization of net loss729(1)1-
Curtailment gain-(2)(2)---
Settlement (Credit)/Charges------
Net periodic benefit cost (credit)$(14)$6$(8)$-$1$1
Nine Months Ended September 30, 2017
Components of net periodic benefit cost:
Service cost$8$23$31$1$2$3
Interest cost12612138538
Expected return on assets(194)(18)(212)---
Amortization of prior service credit---(1)-(1)
Amortization of net (gain) loss20929---
Curtailment gain-(5)(5)---
Settlement (Credit)/Charges50-50---
Net periodic benefit cost (credit)$10$21$31$5$5$10
Nine Months Ended September 30, 2016
Components of net periodic benefit cost:
Service cost$15$23$38$2$2$4
Interest cost13615151527
Expected return on assets(219)(20)(239)---
Amortization of prior service credit---(7)-(7)
Amortization of net loss19625(1)1-
Curtailment gain-(5)(5)---
Settlement (Credit)/Charges------
Net periodic benefit cost (credit)$(49)$19$(30)$(1)$5$4

For the nine-month period ended September 30, 2017, we contributed $310 million to the U.S. AIG Retirement Plan.

The lump sum benefit payments through September 30, 2017 exceeded the annual service cost and interest cost components of the pension expense resulting in a settlement loss as of September 30, 2017.