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EMPLOYEE BENEFITS
6 Months Ended
Jun. 30, 2016
EMPLOYEE BENEFITS  
EMPLOYEE BENEFITS

12. 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 June 30, 2016
Components of net periodic benefit cost:
Service cost$5$7$12$-$1$1
Interest cost45550213
Expected return on assets(74)(6)(80)---
Amortization of prior service credit---(3)-(3)
Amortization of net loss628---
Curtailment gain-(1)(1)---
Net periodic benefit (income) cost$(18)$7$(11)$(1)$2$1
Three Months Ended June 30, 2015
Components of net periodic benefit cost:
Service cost$51$10$61$1$1$2
Interest cost556612-2
Expected return on assets(72)(6)(78)---
Amortization of prior service credit(8)-(8)(2)-(2)
Amortization of net loss33235---
Curtailment gain-(1)(1)---
Net periodic benefit cost$59$11$70$1$1$2
Six Months Ended June 30, 2016
Components of net periodic benefit cost:
Service cost$9$15$24$1$2$3
Interest cost9110101325
Expected return on assets(147)(13)(160)---
Amortization of prior service credit---(5)-(5)
Amortization of net loss12416---
Curtailment gain-(3)(3)---
Net periodic benefit (income) cost$(35)$13$(22)$(1)$4$3
Six Months Ended June 30, 2015
Components of net periodic benefit cost:
Service cost$103$21$124$3$2$5
Interest cost11012122415
Expected return on assets(144)(12)(156)---
Amortization of prior service credit(16)(1)(17)(5)-(5)
Amortization of net loss65570---
Curtailment gain-(1)(1)---
Net periodic benefit cost$118$24$142$2$3$5