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Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2025
Retirement Benefits [Abstract]  
Projected Benefit Obligations, Plan Assets and Funded Status of Pension Plans Benefit obligations, plan assets and funded status for our pension and postretirement plans were as follows at December 31:
PensionPostretirement
(in millions)2025202420252024
Change in benefit obligation:
    Benefit obligation at beginning of year (1)
$6,082 $6,428 $1,078 $1,246 
   Service cost
37 41 11 15 
   Interest cost
318 321 56 62 
   Benefits paid
(457)(457)(90)(91)
   Actuarial (gains) losses216 (251)21 (153)
   Plan amendments4 — — (1)
Benefit obligation at end of year (1)
6,200 6,082 1,076 1,078 
Change in plan assets:
    Fair value of plan assets at beginning of year6,545 6,775 84 102 
   Actual return on plan assets646 209 9 12 
   Employer contributions
16 18 — — 
   Benefits paid
(457)(457)(23)(30)
Fair value of plan assets at end of year6,750 6,545 70 84 
    Funded status at December 31
$550 $463 $(1,006)$(994)
Amounts recognized on our consolidated balance sheets:
    Other assets
$727 $624 $— $— 
    Other accrued liabilities
(55)(25)(67)(59)
    Accrued pension costs
(122)(136)— — 
    Accrued postretirement health care costs
— — (939)(935)
$550 $463 $(1,006)$(994)
(1) We measure our pension plans using the projected benefit obligation and our postretirement plans using the accumulated postretirement benefit obligation.
Net Pension Liability Recognized in Consolidated Balance Sheets Benefit obligations, plan assets and funded status for our pension and postretirement plans were as follows at December 31:
PensionPostretirement
(in millions)2025202420252024
Change in benefit obligation:
    Benefit obligation at beginning of year (1)
$6,082 $6,428 $1,078 $1,246 
   Service cost
37 41 11 15 
   Interest cost
318 321 56 62 
   Benefits paid
(457)(457)(90)(91)
   Actuarial (gains) losses216 (251)21 (153)
   Plan amendments4 — — (1)
Benefit obligation at end of year (1)
6,200 6,082 1,076 1,078 
Change in plan assets:
    Fair value of plan assets at beginning of year6,545 6,775 84 102 
   Actual return on plan assets646 209 9 12 
   Employer contributions
16 18 — — 
   Benefits paid
(457)(457)(23)(30)
Fair value of plan assets at end of year6,750 6,545 70 84 
    Funded status at December 31
$550 $463 $(1,006)$(994)
Amounts recognized on our consolidated balance sheets:
    Other assets
$727 $624 $— $— 
    Other accrued liabilities
(55)(25)(67)(59)
    Accrued pension costs
(122)(136)— — 
    Accrued postretirement health care costs
— — (939)(935)
$550 $463 $(1,006)$(994)
(1) We measure our pension plans using the projected benefit obligation and our postretirement plans using the accumulated postretirement benefit obligation.
Assumptions used to Determine Benefit Obligations to determine our benefit obligations at December 31:
PensionPostretirement
2025202420252024
Discount rate5.4 %5.7 %5.4 %5.7 %
Rate of compensation increase - long-term4.0 4.0 — — 
Health care cost trend rate assumed for next year— — 6.1 6.3 
Ultimate trend rate— — 5.0 5.0 
Year that the rate reaches the ultimate trend rate— — 20312031
Schedule of Net Benefit Costs Net periodic benefit cost (income) consisted of the following for the years ended December 31:
PensionPostretirement
(in millions)202520242023202520242023
Service cost$37 $41 $39 $11 $15 $15 
Interest cost318 321 333 56 62 65 
Expected return on plan assets(430)(465)(485)(5)(6)(8)
Amortization:
Net loss (gain)50 28 4 (12)(6)(2)
Prior service cost (credit)5 5 6 (41)(41)(40)
Net periodic benefit cost (income)$(20)$(70)$(103)$9 $24 $30 
Schedule Of Assumptions To Determine Net Periodic Benefit Cost
We used the following assumptions to determine our net periodic benefit cost (income) for the years ended December 31:
PensionPostretirement
202520242023202520242023
Discount rates:
Service cost5.9 %5.4 %5.7 %5.9 %5.3 %5.7 %
Interest cost 5.4 5.2 5.5 5.4 5.2 5.5 
Expected rate of return on plan assets
6.1 6.1 6.1 7.4 7.4 7.4 
Rate of compensation increase - long-term4.0 4.0 4.0 — — — 
Health care cost trend rate
— — — 6.3 6.5 6.5 
Schedule of Fair Value of Plan Assets by Asset Category
The actual composition of our plan assets at December 31, 2025 was broadly characterized with the following allocation:
PensionPostretirement
Equity securities11 %54 %
Corporate bonds
71 %31 %
U.S. Treasury and foreign government securities10 %5 %
All other investments 8 %10 %
The fair values of our pension plan assets by asset category were as follows at December 31:
20252024
(in millions)Level 1Level 2TotalLevel 1Level 2Total
U.S. and foreign government securities or their agencies:
U.S. government and agencies$— $634 $634 $— $508 $508 
U.S. municipal bonds
— 63 63 — 69 69 
Foreign government and agencies
— 30 30 — 54 54 
Corporate debt instruments:
Above investment grade
— 4,151 4,151 — 3,572 3,572 
Below investment grade and no rating
— 698 698 — 582 582 
Common stock:
International equities
249 — 249 398 — 398 
U.S. equities205 — 205 361 — 361 
Asset backed securities
— 203 203 — 185 185 
Other, net(6)98 92 (15)99 84 
$448 $5,877 $6,325 $744 $5,069 $5,813 
Investments measured at NAV as a practical expedient for fair value:
Collective investment funds
U.S. large cap
$259 $445 
U.S. small cap 17 100 
International developed markets27 53 
Total investments measured at NAV$303 $598 
Other122 134 
Fair value of plan assets, net$6,750 $6,545 
Level 3 holdings and transactions were immaterial relative to total plan assets at December 31, 2025 and 2024.
The fair values of our postretirement plan assets were as follows at December 31:
2025
2024
(in millions)Level 1Level 2TotalLevel 1Level 2Total
U.S. and foreign government securities or their agencies:
U.S. government and agencies$— $2 $2 $— $1 $1 
Foreign government and agencies
— 2 2 — 2 2 
Corporate debt instruments:
Above investment grade
— 20 20 — 24 24 
Below investment grade and no rating
— 2 2 — 2 2 
Other, net— 7 7 — 8 8 
$— $33 $33 $— $37 $37 
Investments measured at NAV as a practical expedient for fair value:
Collective investment funds:
U.S. large cap
$25 $35 
International developed markets13 12 
Total investments measured at NAV$38 $47 
Other
(1)— 
Fair value of plan assets, net$70 $84 
Estimated Future Benefit Payments
Estimated future benefit payments at December 31, 2025 were as follows:
(in millions)PensionPostretirement
2026$528 $82 
2027482 81 
2028482 81 
2029481 82 
2030481 82 
2031-20352,330 416 
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)
We recorded the following amounts in accumulated other comprehensive losses at December 31, 2025:
(in millions)PensionPost-
retirement		Post-
employment		Total
Net (loss) gain$(2,164)$142 $(54)$(2,076)
Prior service (cost) credit(12)175 (5)158 
Deferred income taxes
566 (78)15 503 
Amounts recorded in accumulated other comprehensive losses$(1,610)$239 $(44)$(1,415)
We recorded the following amounts in accumulated other comprehensive losses at December 31, 2024:
(in millions)PensionPost-
retirement		Post-
employment		Total
Net (loss) gain$(2,213)$172 $(45)$(2,086)
Prior service (cost) credit
(13)216 (5)198 
Deferred income taxes
578 (95)13 496 
Amounts recorded in accumulated other comprehensive losses$(1,648)$293 $(37)$(1,392)
Movements in Other Comprehensive Earnings/Losses
The movements in other comprehensive earnings (losses) for the year ended December 31, 2025 were as follows:
(in millions)PensionPost-
retirement		Post-
employment		Total
Amounts reclassified to net earnings as components of net periodic benefit cost (income):
Amortization:
Net loss (gain)$50 $(12)$7 $45 
Prior service cost (credit)5 (41)— (36)
Deferred income taxes(13)13 (2)(2)
$42 $(40)$5 $7 
Other movements during the year:
Net (loss) gain $(1)$(18)$(16)$(35)
Prior service (cost) credit(4)— — (4)
Deferred income taxes1 4 4 9 
$(4)$(14)$(12)$(30)
Total movements in other comprehensive earnings (losses)$38 $(54)$(7)$(23)
The movements in other comprehensive earnings (losses) for the year ended December 31, 2024 were as follows:
(in millions)PensionPost-retirementPost-employmentTotal
Amounts reclassified to net earnings as components of net periodic benefit cost (income):
Amortization:
Net loss (gain)$28 $(6)$7 $29 
Prior service cost (credit)5 (41)— (36)
Deferred income taxes(8)12 (2)2 
$25 $(35)$5 $(5)
Other movements during the year:
Net (loss) gain$(5)$159 $(13)$141 
Prior service (cost) credit— 1 — 1 
Deferred income taxes1 (40)3 (36)
$(4)$120 $(10)$106 
Total movements in other comprehensive earnings (losses)$21 $85 $(5)$101 
The movements in other comprehensive earnings (losses) for the year ended December 31, 2023 were as follows:
(in millions)PensionPost-
retirement		Post-
employment		Total
Amounts reclassified to net earnings as components of net periodic benefit cost (income):
Amortization:
Net loss (gain)$4 $(2)$6 $8 
Prior service cost (credit)6 (40)— (34)
Deferred income taxes(2)11 (1)8 
$8 $(31)$5 $(18)
Other movements during the year:
Net (loss) gain$(60)$20 $(11)$(51)
Prior service (cost) credit— 3 — 3 
Deferred income taxes16 (10)3 9 
$(44)$13 $(8)$(39)
Total movements in other comprehensive earnings (losses)$(36)$(18)$(3)$(57)