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TableofContents
Net Periodic Cost
PensionBenefits
OtherPostretirementand
PostemploymentBenefits
YearEndedDecember31,
YearEndedDecember31,
(inmillions) 2015 2014 2013
2015 2014 2013
Servicecost $ — $ — $ —
$ 62 $ 52 $ 49
Interestcost 884 928 861
141 155 143
Expectedreturnonplanassets (879) (829) (734)
(81) (84) (84)
Amortizationofpriorservicecredit — — —
(26) (26) (26)
Recognizednetactuarialloss 232 134 221
24 4 25
Settlements 3 — 6
———
Netperiodiccost $ 240 $ 233 $ 354
$ 120 $ 101 $ 107
Definedcontributionplancosts 592 551 490
———
Totalcost $ 832 $ 784 $ 844
$ 120 $ 101 $ 107
Assumptions
Weusedthefollowingactuarialassumptionstodetermineourbenefitobligationsandournetperiodiccostfortheperiodspresented:
December31,
BenefitObligations(1)(2) 2015 2014
Weightedaveragediscountrate 4.57% 4.14%
YearEndedDecember31,
NetPeriodicCost(2) 2015 2014 2013
Weightedaveragediscountrate-pensionbenefit 4.13% 4.99% 4.10%
Weightedaveragediscountrate-otherpostretirementbenefit(3) 4.13% 4.88% 4.00%
Weightedaveragediscountrate-otherpostemploymentbenefit 4.13% 5.00% 4.13%
Weightedaverageexpectedlong-termrateofreturnonplanassets 8.94% 8.94% 8.94%
Assumedhealthcarecosttrendrate(4) 7.00% 7.00% 7.00%
(1)Our2015and2014benefitobligationsaremeasuredusingamortalitytableprojectedto2022.
(2) Futurecompensationlevelsdonotimpactourfrozendefinedbenefitpensionplansorotherpostretirementplansandimpactonlyasmallportionofourotherpostemploymentliability.
(3) Ourassumptionsreflectvariousremeasurementsofcertainportionsofourobligationsandrepresenttheweightedaverageoftheassumptionsusedforeachmeasurementdate.
(4) AssumedhealthcarecosttrendrateatDecember31,2015isassumedtodeclinegraduallyto5.00%by2024andremainlevelthereafter.
HealthcareCostTrendRate.Assumedhealthcarecosttrendrateshaveaneffectontheamountsreportedfortheotherpostretirementbenefitplans.A1%
changeinthehealthcarecosttrendrateusedinmeasuringtheaccumulatedplanbenefitobligationfortheseplans,whichprovidebenefitstoeligibleretireesand
theirdependentswhoareunderage65,atDecember31,2015,wouldhavethefollowingeffects:
(inmillions) 1%Increase 1%Decrease
Increase(decrease)intotalserviceandinterestcost $ 1 $ (1)
Increase(decrease)intheaccumulatedplanbenefitobligation 12 (25)
80