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Pension Plans and Other Postretirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2025
Retirement Benefits [Abstract]  
Schedule of Changes in Benefit Obligations
The following tables outline the change in pension benefit obligation and plan assets over the specified periods:
In millions20252024
Change in benefit obligation:
Benefit obligation, beginning of year$4,349 $4,736 
Interest cost221 222 
Actuarial loss (gain)123 (262)
Benefit payments(356)(347)
Benefit obligation, end of year4,337 4,349 
Change in plan assets:
Fair value of plan assets, beginning of year5,188 5,379 
Actual return on plan assets433 133 
Employer contributions22 23 
Benefit payments(356)(347)
Fair value of plan assets, end of year5,287 5,188 
Funded status$950 $839 
Schedule of Changes in Plan Assets
The following tables outline the change in pension benefit obligation and plan assets over the specified periods:
In millions20252024
Change in benefit obligation:
Benefit obligation, beginning of year$4,349 $4,736 
Interest cost221 222 
Actuarial loss (gain)123 (262)
Benefit payments(356)(347)
Benefit obligation, end of year4,337 4,349 
Change in plan assets:
Fair value of plan assets, beginning of year5,188 5,379 
Actual return on plan assets433 133 
Employer contributions22 23 
Benefit payments(356)(347)
Fair value of plan assets, end of year5,287 5,188 
Funded status$950 $839 
Schedule of Assets (Liabilities) Recognized in Balance Sheet
The assets (liabilities) recognized on the consolidated balance sheets at December 31, 2025 and 2024 for the defined benefit pension plans consisted of the following:
In millions20252024
Noncurrent assets reflected in other assets$1,137 $1,030 
Current liabilities reflected in accrued expenses and other current liabilities
(22)(22)
Noncurrent liabilities reflected in other long-term liabilities(165)(169)
Net assets$950 $839 
Schedule of Net Periodic Benefit Cost (Income)
The components of net periodic benefit cost (income) for the years ended December 31, 2025, 2024 and 2023 are shown below:
In millions202520242023
Components of net periodic benefit cost (income):
Interest cost$221 $222 $231 
Expected return on plan assets(339)(327)(326)
Amortization of net actuarial loss1 1 1 
Net periodic benefit cost (income)$(117)$(104)$(94)
Weighted Average Assumptions Used in Determining Benefit Obligations and Net Benefit Costs
The Company determined its benefit obligation based on the following weighted average assumptions as of December 31, 2025 and 2024:
20252024
Discount rate5.3 %5.6 %

The Company determined its net periodic benefit cost (income) based on the following weighted average assumptions for the years ended December 31, 2025, 2024 and 2023:
202520242023
Discount rate5.3 %4.9 %5.1 %
Expected long-term rate of return on plan assets6.8 %6.3 %6.3 %
Schedule of Changes in Fair Value of Plan Assets
Pension plan assets with changes in fair value measured on a recurring basis at December 31, 2025 were as follows:
In millionsLevel 1Level 2Level 3Total
Cash and cash equivalents$25 $91 $— $116 
Debt securities:
    U.S. government securities528 19 — 547 
    States, municipalities and political subdivisions— 73 — 73 
    U.S. corporate securities— 2,391 2 2,393 
    Foreign securities— 82 — 82 
    Commercial mortgage-backed securities— 9 — 9 
    Other asset-backed securities— 9 — 9 
Total debt securities528 2,583 2 3,113 
Equity securities:
    U.S. domestic101 — — 101 
    International25 13 — 38 
Total equity securities126 13 — 139 
Other investments:
    Private real estate
— — 182 182 
    Common/collective trusts (1)
— 958 — 958 
    Derivatives— 10 — 10 
Total other investments— 968 182 1,150 
Total pension investments (2)
$679 $3,655 $184 $4,518 
_____________________________________________
(1)The assets in the underlying funds of common/collective trusts consist of $284 million of equity securities and $674 million of debt securities.
(2)Excludes $212 million of other receivables as well as $278 million of private equity limited partnership investments and $279 million of hedge fund limited partnership investments as these amounts are measured at NAV per share or an equivalent and are not subject to leveling within the fair value hierarchy.
Pension plan assets with changes in fair value measured on a recurring basis at December 31, 2024 were as follows:
In millionsLevel 1Level 2Level 3Total
Cash and cash equivalents$32 $67 $— $99 
Debt securities:
    U.S. government securities481 6 — 487 
    States, municipalities and political subdivisions— 70 — 70 
    U.S. corporate securities— 2,752 1 2,753 
    Foreign securities— 98 — 98 
    Residential mortgage-backed securities— 7 — 7 
    Commercial mortgage-backed securities— 9 — 9 
    Other asset-backed securities— 4 — 4 
    Redeemable preferred securities— 1 — 1 
Total debt securities481 2,947 1 3,429 
Equity securities:
    U.S. domestic30 — — 30 
    International12 — — 12 
Total equity securities42 — — 42 
Other investments:
    Private real estate
— — 276 276 
    Common/collective trusts (1)
— 502 — 502 
    Derivatives— 3 — 3 
Total other investments— 505 276 781 
Total pension investments (2)
$555 $3,519 $277 $4,351 
_____________________________________________
(1)The assets in the underlying funds of common/collective trusts consist of $288 million of equity securities and $214 million of debt securities.
(2)Excludes $267 million of other receivables as well as $290 million of private equity limited partnership investments and $280 million of hedge fund limited partnership investments as these amounts are measured at NAV per share or an equivalent and are not subject to leveling within the fair value hierarchy.
Schedule of Change in Level 3 Plan Assets
The changes in the balances of Level 3 pension plan assets during the year ended December 31, 2025 were as follows:
In millions
Private
real estate
U.S. corporate
securities		Total
Beginning balance$276 $1 $277 
Actual return on plan assets(16)— (16)
Purchases, sales and settlements(78)1 (77)
Transfers out of Level 3— — — 
Ending balance$182 $2 $184 

The changes in the balances of Level 3 pension plan assets during the year ended December 31, 2024 were as follows:

In millions
Private
real estate
U.S. corporate
securities		Total
Beginning balance$290 $— $290 
Actual return on plan assets1 — 1 
Purchases, sales and settlements(15)1 (14)
Transfers out of Level 3— — — 
Ending balance$276 $1 $277 
Schedule of Expected Future Benefits Payments
The Company estimates the following future benefit payments, which are calculated using the same actuarial assumptions used to measure the pension benefit obligation as of December 31, 2025:
In millions
2026$387 
2027383 
2028382 
2029375 
2030365 
2031-2035
1,674 
The Company estimates the following future benefit payments, which are calculated using the same actuarial assumptions used to measure the accumulated other postretirement benefit obligation as of December 31, 2025:
In millions
2026$13 
202713 
202813 
202913 
203013 
2031-2035
61