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EMPLOYEE BENEFITS
6 Months Ended
Jun. 30, 2015
EMPLOYEE BENEFITS  
EMPLOYEE BENEFITS

12. EMPLOYEE BENEFITS

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, 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) cost(8)-(8)(2)-(2)
Amortization of net loss33235---
Other-(1)(1)---
Net periodic benefit cost$59$11$70$1$1$2
Three Months Ended June 30, 2014
Components of net periodic benefit cost:
Service cost$44$10$54$1$1$2
Interest cost578653-3
Expected return on assets(71)(5)(76)---
Amortization of prior service (credit) cost(9)-(9)(3)-(3)
Amortization of net loss11213---
Other------
Net periodic benefit cost$32$15$47$1$1$2
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) cost(16)(1)(17)(5)-(5)
Amortization of net loss65570---
Other-(1)(1)---
Net periodic benefit cost$118$24$142$2$3$5
Six Months Ended June 30, 2014
Components of net periodic benefit cost:
Service cost$88$21$109$2$1$3
Interest cost11415129516
Expected return on assets(142)(11)(153)---
Amortization of prior service (credit) cost(17)(1)(18)(5)-(5)
Amortization of net loss22426---
Other------
Net periodic benefit cost$65$28$93$2$2$4

For the six-month period ended June 30, 2015, we contributed $108 million to our U.S. and non-U.S. pension plans and we estimate that we will contribute an additional $65 million for the remainder of 2015. These estimates are subject to change because contribution decisions are affected by various factors, including our liquidity, market performance and management discretion.