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Pension and Other Postretirement Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Obligations and Funded Status at End of Year
Obligations and Funded Status at End of Year
 United States
Pension Benefits
Foreign
Pension Benefits
Other Postretirement
Benefits
Millions of dollars202020192020201920202019
Funded status
Fair value of plan assets$3,103 $2,934 $632 $593 $ $— 
Benefit obligations3,237 3,141 1,029 941 191 355 
Funded status$(134)$(207)$(397)$(348)$(191)$(355)
Amounts recognized in the consolidated balance sheets
Noncurrent asset$37 $— $14 $11 $ $— 
Current liability(18)(6)(12)(17)(25)(33)
Noncurrent liability(153)(201)(399)(342)(166)(322)
Amount recognized$(134)$(207)$(397)$(348)$(191)$(355)
Amounts recognized in accumulated other comprehensive loss (pre-tax)
Net actuarial loss$1,227 $1,329 $279 $234 $23 $15 
Prior service (credit) cost1 3 (140)(16)
Amount recognized$1,228 $1,330 $282 $238 $(117)$(1)
Change in Benefit Obligation
Change in Benefit Obligation
 United States
Pension Benefits
Foreign
Pension Benefits
Other Postretirement
Benefits
Millions of dollars202020192020201920202019
Benefit obligation, beginning of year$3,141 $3,033 $941 $834 $355 $356 
Service cost3 6 4 
Interest cost94 123 17 23 8 16 
Plan participants' contributions — 1  — 
Actuarial loss (gain)282 279 96 85 9 14 
Benefits paid(186)(263)(33)(30)(24)(28)
Plan amendments —  (156)(15)
Transfer of liabilities —  (2) — 
Other adjustments —  11  
Special termination benefit —  —   
Settlements / curtailment (gain)(97)(33)(37)(13) — 
Foreign currency exchange rates — 38 20 (5)(1)
Reclassification of obligation to held for sale —  —  — 
Benefit obligation, end of year$3,237 $3,141 $1,029 $941 $191 $355 
Accumulated benefit obligation, end of year$3,222 $3,128 $987 $902 N/AN/A
Change in Plan Assets
Change in Plan Assets
 United States Pension BenefitsForeign
Pension Benefits
Other Postretirement
Benefits
Millions of dollars202020192020201920202019
Fair value of plan assets, beginning of year$2,934 $2,676 $593 $518 $ $— 
Actual return on plan assets447 517 58 61  — 
Employer contribution5 37 29 33 24 28 
Plan participants' contributions — 1  — 
Benefits paid(186)(263)(33)(30)(24)(28)
Transfer of plan assets —  (2) — 
Other adjustments —   — 
Settlements(97)(33)(37)(13) — 
Foreign currency exchange rates — 21 20  — 
Reclassification of plan assets to held for sale —  —  — 
Fair value of plan assets, end of year$3,103 $2,934 $632 $593 $ $— 
Components of Net Periodic Benefit Cost
Components of Net Periodic Benefit Cost
 United States
Pension Benefits
Foreign
Pension Benefits
Other Postretirement
Benefits
Millions of dollars202020192018202020192018202020192018
Service cost$3 $$$6 $$$4 $$
Interest cost94 123 118 17 23 23 8 16 15 
Expected return on plan assets(165)(177)(170)(30)(29)(32) — — 
Amortization:
Actuarial loss62 47 53 12  — 
Prior service cost (credit) (2)(3) — — (28)(16)— 
Special termination benefit — —  — —  — — 
Curtailment (gain) / loss — —  — (4)(3)— — 
Settlement loss39 — 11  — — 
Net periodic benefit cost$33 $$— $16 $10 $$(19)$$22 
Net Periodic Cost Recognized in Operating Profit and Interest and Sundry (Income) Expense
The following table summarizes the net periodic cost recognized in operating profit and interest and sundry (income) expense for the years ending December 31, 2020, 2019 and 2018:
 United States
Pension Benefits
Foreign
Pension Benefits
Other Postretirement
Benefits
Millions of dollars202020192018202020192018202020192018
Operating profit (loss)$3 $$$6 $$$4 $$
Interest and sundry (income) expense30 — (2)10 (1)(23)15 
Net periodic benefit cost$33 $$— $16 $10 $$(19)$$22 
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss (Pre-Tax) in 2018
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (Pre-Tax) in 2020
Millions of dollarsUnited States
Pension Benefits
Foreign
Pension Benefits
Other Postretirement
Benefits
Current year actuarial loss / (gain)$— $69 $
Actuarial (loss) recognized during the year(101)(24)— 
Current year prior service cost (credit)— — (156)
Prior service credit (cost) recognized during the year— — 32 
Total recognized in other comprehensive income (loss) (pre-tax)$(101)$45 $(115)
Total recognized in net periodic benefit costs and other comprehensive income (loss) (pre-tax)$(68)$61 $(134)
Weighted-average Assumptions Used to Determine Benefit Obligation at the End of the Year and Net Periodic Cost
Weighted-Average Assumptions used to Determine Benefit Obligation at End of Year
 United States
Pension Benefits
Foreign
Pension Benefits
Other Postretirement
Benefits
 202020192020201920202019
Discount rate2.50 %3.30 %1.55 %2.04 %2.98 %3.45 %
Rate of compensation increase4.50 %4.50 %3.47 %3.10 %N/AN/A
Interest crediting rate for cash balance plans1.25 %2.05 %1.99 %1.80 %N/AN/A
Weighted-Average Assumptions used to Determine Net Periodic Cost
 United States
Pension Benefits
Foreign
Pension Benefits
Other Postretirement
Benefits
 202020192018202020192018202020192018
Discount rate3.13%4.30%3.65%2.04%2.90%2.57%3.35%4.80%4.35%
Expected long-term rate of return on plan assets6.25%6.50%6.75%5.39%5.56%5.81%N/AN/AN/A
Rate of compensation increase4.50%4.50%4.50%3.10%3.29%3.20%N/AN/AN/A
Interest crediting rate for cash balance plans2.05%3.05%2.40%1.80%2.19%2.16%N/AN/AN/A
Health care cost trend rate
Initial rateN/AN/AN/AN/AN/AN/A6.25%6.50%6.50%
Ultimate rateN/AN/AN/AN/AN/AN/A5.00%5.00%5.00%
Year that ultimate rate will be reachedN/AN/AN/AN/AN/AN/A202520252025
Expected Employer Contributions to Funded Plans
Expected Employer Contributions to Funded Plans
Millions of dollarsUnited States
Pension Benefits
Foreign
Pension Benefits
2021$— $18 
Expected Benefit Payments
Expected Benefit Payments
Millions of dollarsUnited States
Pension Benefits
Foreign
Pension Benefits
Other Postretirement Benefits
2021$294 $39 $25 
20222434025
20232364124
20242314010
2025222459
2026-2030$989 $234 $43 
Schedule of Allocation of Plan Assets
The fair values of our pension plan assets at December 31, 2020 and 2019, by asset category were as follows:
December 31,
Quoted prices
(Level 1)
Other significant
observable inputs
(Level 2)
Significant
unobservable inputs
(Level 3)
Net Asset ValueTotal
Millions of dollars2020201920202019202020192020201920202019
Cash and cash equivalents$ $— $281 $24 $ $— $ $— $281 $24 
Government and government agency securities (1)
U.S. securities — 182 488  —  — 182 488 
International securities — 99 97  —  — 99 97 
Corporate bonds and notes (1)
U.S. companies — 1,691 1,389  —  — 1,691 1,389 
International companies — 279 277  —  — 279 277 
Equity securities (2)
U.S. companies —  —  —  —  — 
International companies47 51  —  —  — 47 51 
Mutual funds (3)
 — 108 128  —  — 108 128 
Investments at net asset value
U.S. equity securities (4)
 —  —  — 448 367 448 367 
International equity securities (4)
 —  —  — 180 215 180 215 
Short-term investment fund (4)
 —  —  — 24 15 24 15 
International debt securities (5)
 —  —  — 208 251 208 251 
International equity securities (5)
 —  —  — 53 59 53 59 
Real estate (6)
 —  —  — 13 34 13 34 
Limited partnerships (7)
U.S. private equity investments —  — 38 53  — 38 53 
Diversified fund of funds —  — 3  — 3 
Emerging growth —  — 3  — 3 
All other investments — 48 34  — 30 32 78 66 
$47 $51 $2,688 $2,437 $44 $66 $956 $973 $3,735 $3,527 
(1)Valued using pricing vendors who use proprietary models to estimate the price a dealer would pay to buy a security using significant observable inputs, such as interest rates, yield curves, and credit risk.
(2)Valued using the closing stock price on a national securities exchange, which reflects the last reported sales price on the last business day of the year.
(3)Valued using the net asset value (NAV) of the fund, which is based on the fair value of underlying securities. The fund primarily invests in a diversified portfolio of equity securities, fixed income debt securities and real estate issued by non-U.S. companies.
(4)Common and collective trust funds valued using the NAV of the fund, which is based on the fair value of underlying securities.
(5)Fund of funds valued using the NAV of the fund, which is based on the fair value of underlying securities. International debt securities includes corporate bonds and notes and government and government agency securities.
(6)Valued using the NAV of the fund, which is based on the fair value of underlying assets.
(7)Valued at estimated fair value based on the proportionate share of the limited partnership's fair value, as determined by the general partner.
Fair Value Measurements Using Significant Unobservable Inputs
Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Millions of dollarsLimited
Partnerships
Balance, December 31, 2019
$66 
Realized gains (net)17 
Unrealized losses (net)(16)
Purchases 
Settlements(23)
Balance, December 31, 2020
$44 
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets
The projected benefit obligation and fair value of plan assets for pension plans with a projected benefit obligation in excess of plan assets at December 31, 2020 and 2019 were as follows:
 United States
Pension Benefits
Foreign
Pension Benefits
Millions of dollars2020201920202019
Projected benefit obligation$2,718 $2,622 $951 $844 
Fair value of plan assets$2,547 $2,409 $546 $491 
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets
The projected benefit obligation, accumulated benefit obligation and fair value of plan assets for pension plans with an accumulated benefit obligation in excess of plan assets at December 31, 2020 and 2019 were as follows:
 United States
Pension Benefits
Foreign
Pension Benefits
Millions of dollars 2020201920202019
Projected benefit obligation$2,718 $2,622 $951 $800 
Accumulated benefit obligation2,703 2,609 921 776 
Fair value of plan assets$2,547 $2,409 $546 $450