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EMPLOYEE BENEFITS
9 Months Ended
Sep. 30, 2016
EMPLOYEE BENEFITS  
EMPLOYEE BENEFITS

13. 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. Effective January 1, 2016, the U.S. defined benefit pension plans were frozen for current participants and closed to new hires. Accordingly, compensation-based benefits are no longer credited to the cash balance accounts of plan participants.

Beginning in 2016, interest cost for pension and postretirement benefits for our U.S. plans and largest non-U.S. plans is measured by applying the specific spot rates along the yield curve to the plans’ corresponding discounted cash flows that comprise the obligation (the Spot Rate Approach). This method provides a more precise measurement of interest cost by aligning the timing of the plans’ discounted cash flows to the corresponding spot rates on the yield curve. Previously, we measured interest cost utilizing a single weighted-average discount rate derived from the yield curve used to measure the benefit obligations. 

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, 2016
Components of net periodic benefit cost:
Service cost$6$8$14$1$-$1
Interest cost455502-2
Expected return on assets(72)(7)(79)---
Amortization of prior service credit---(2)-(2)
Amortization of net (gain) loss729(1)1-
Curtailment gain-(2)(2)---
Net periodic benefit (income) cost$(14)$6$(8)$-$1$1
Three Months Ended September 30, 2015
Components of net periodic benefit cost:
Service cost$41$10$51$1$-$1
Interest cost54660213
Expected return on assets(74)(5)(79)---
Amortization of prior service credit(6)(1)(7)(3)-(3)
Amortization of net loss21223---
Curtailment gain(179)-(179)---
Net periodic benefit (income) cost$(143)$12$(131)$-$1$1
Nine Months Ended September 30, 2016
Components of net periodic benefit cost:
Service cost$15$23$38$2$2$4
Interest cost13615151527
Expected return on assets(219)(20)(239)---
Amortization of prior service credit---(7)-(7)
Amortization of net (gain) loss19625(1)1-
Curtailment gain-(5)(5)---
Net periodic benefit (income) cost$(49)$19$(30)$(1)$5$4
Nine Months Ended September 30, 2015
Components of net periodic benefit cost:
Service cost$144$31$175$4$2$6
Interest cost16418182628
Expected return on assets(218)(17)(235)---
Amortization of prior service credit(22)(2)(24)(8)-(8)
Amortization of net loss86793---
Curtailment gain(179)(1)(180)---
Net periodic benefit (income) cost$(25)$36$11$2$4$6