FORM 10-K

59 Periodic Benefit Cost (Credit) The components of net periodic benefit cost (credit) and other amounts recognized in OCI are as follows: Pension Benefits Postretirement Benefits Other than Pensions (In millions) 2017 2016 2015 2017 2016 2015 Net periodic benefit cost (credit) Service cost $ 100 $ 98 $ 113 $ 3 $ 3 $ 4 Interest cost 323 338 327 12 16 15 Expected return on plan assets (507) (490) (483) — — — Amortization of prior service cost (credit) 15 15 16 (8) (22) (25) Amortization of net actuarial loss (gain) 137 104 148 (1) — 2 Curtailment and other charges — — 6 — — — Net periodic benefit cost (credit) $ 68 $ 65 $ 127 $ 6 $ (3) $ (4) Other changes in plan assets and benefit obligations recognized in OCI Current year actuarial loss (gain) $ (11) $ 399 $ (107) $ (7) $ (17) $ (29) Current year prior service cost (credit) 1 — — — (12) — Amortization of net actuarial gain (loss) (137) (104) (148) 1 — (2) Amortization of prior service credit (cost) (15) (15) (18) 8 22 25 Total recognized in OCI, before taxes $ (162) $ 280 $ (273) $ 2 $ (7) $ (6) Total recognized in net periodic benefit cost (credit) and OCI $ (94) $ 345 $ (146) $ 8 $ (10) $ (10) The estimated amount that will be amortized from Accumulated other comprehensive loss into net periodic pension costs in 2018 is as follows: (In millions) Pension Benefits Postretirement Benefits Other than Pensions Net actuarial loss (gain) $ 154 $ (1) Prior service cost (credit) 15 (6) Total $ 169 $ (7) Obligations and Funded Status All of our plans are measured as of our fiscal year-end. The changes in the projected benefit obligation and in the fair value of plan assets, along with our funded status, are as follows: Pension Benefits Postretirement Benefits Other than Pensions (In millions) 2017 2016 2017 2016 Change in projected benefit obligation Projected benefit obligation at beginning of year $ 7,991 $ 7,476 $ 317 $ 364 Service cost 100 98 3 3 Interest cost 323 338 12 16 Plan participants’ contributions — — 5 5 Actuarial losses (gains) 494 571 (7) (17) Benefits paid (413) (410) (41) (42) Plan amendment 1 — — (12) Curtailments and special termination benefits — (7) — — Foreign exchange rate changes and other 67 (75) — — Projected benefit obligation at end of year $ 8,563 $ 7,991 $ 289 $ 317 Change in fair value of plan assets Fair value of plan assets at beginning of year $ 6,874 $ 6,668 Actual return on plan assets 1,011 655 Employer contributions* 345 40 Benefits paid (413) (410) Foreign exchange rate changes and other 60 (79) Fair value of plan assets at end of year $ 7,877 $ 6,874 Funded status at end of year $ (686) $ (1,117) $ (289) $ (317) *In 2017, employer contributions included a $300 million discretionary contribution to fund a U.S. pension plan.