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Pension and Postretirement Plans (Tables)
 12 Months Ended
Dec. 31, 2022
Retirement Benefits [Abstract]  
Schedule of Reconciliation of Projected Benefit Obligations and Plan Assets
The following table provides a reconciliation of the projected benefit obligations and plan assets for our pension plans and accumulated benefit obligations for our other postretirement benefit plans:

 Millions of Dollars
Pension BenefitsOther Benefits
 2022202120222021
U.S.Int’l.U.S.Int’l.
Change in Benefit Obligations
Benefit obligations at January 1$3,033 1,409 3,405 1,480 197 213 
Service cost123 28 146 36 4 5 
Interest cost100 21 81 19 5 5 
Plan participant contributions— 2 — 2 6 6 
Net actuarial gain(528)(502)(82)(37)(37)(13)
Benefits paid(519)(44)(517)(44)(19)(19)
Settlements— (101)— — — — 
Foreign currency exchange rate change— (138)— (47)— — 
Benefit obligations at December 31$2,209 675 3,033 1,409 156 197 
Change in Fair Value of Plan Assets
Fair value of plan assets at January 1$2,547 1,280 2,738 1,212 — — 
Actual return on plan assets(375)(329)289 114 — — 
Company contributions125 23 37 27 13 13 
Plan participant contributions— 2 — 2 6 6 
Benefits paid(519)(44)(517)(44)(19)(19)
Settlements— (101)— — — — 
Foreign currency exchange rate change— (124)— (31)— — 
Fair value of plan assets at December 31$1,778 707 2,547 1,280 — — 
Funded Status at December 31$(431)32 (486)(129)(156)(197)
Schedule of Amounts Recognized in the Consolidated Balance Sheet
Amounts recognized in the consolidated balance sheet for our pension and other postretirement benefit plans at December 31 include:
Millions of Dollars
Pension BenefitsOther Benefits
2022202120222021
U.S.Int’l.U.S.Int’l.
Amounts Recognized in the Consolidated Balance Sheet
Noncurrent assets$— 140 — 51 — — 
Current liabilities(50)— (25)— (15)(15)
Noncurrent liabilities(381)(108)(461)(180)(141)(182)
Total recognized$(431)32 (486)(129)(156)(197)
Schedule of Before Tax Amounts Unrecognized in Net Periodic Benefit Cost Included in Accumulated Other Comprehensive Income
Included in accumulated other comprehensive loss at December 31 were the following before-tax amounts that had not been recognized in net periodic benefit cost:

Millions of Dollars
Pension BenefitsOther Benefits
2022202120222021
U.S.Int’l.U.S.Int’l.
Unrecognized net actuarial loss (gain)
$159 (27)251 130 (59)(24)
Unrecognized prior service credit
— — — (1)— (2)
Schedule of Sources of Change in Other Comprehensive Income (Loss)
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):

Millions of Dollars
Pension BenefitsOther Benefits
2022202120222021
U.S.Int’l.U.S.Int’l.
Sources of Change in Other Comprehensive Income
Net actuarial gain arising during the period$18 136 211 92 37 13 
Amortization of net actuarial loss (gain) and settlements
74 21 101 25 (2)(1)
Amortization of prior service credit— (1)— (1)(2)(2)
Total recognized in other comprehensive income$92 156 312 116 33 10 
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets
Information for U.S. and international pension plans with an accumulated benefit obligation in excess of plan assets at December 31 was:

Millions of Dollars
Pension Benefits
20222021
U.S.Int’l.U.S.Int’l.
Accumulated benefit obligations$2,055 114 2,770 410 
Fair value of plan assets
1,778 13 2,547 248 
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets
Information for U.S. and international pension plans with a projected benefit obligation in excess of plan assets at December 31 was:

Millions of Dollars
Pension Benefits
20222021
U.S.Int’l.U.S.Int’l.
Projected benefit obligations$2,209 121 3,033 428 
Fair value of plan assets
1,778 13 2,547 248 
Schedule of Components of Net Periodic Benefit Cost
Components of net periodic benefit cost for all defined benefit plans are presented in the table below:

Millions of Dollars
Pension BenefitsOther Benefits
202220212020202220212020
U.S.Int’l.U.S.Int’l.U.S.Int’l.
Components of Net Periodic Benefit Cost
Service cost$123 28 146 36 138 28 4 5 5 
Interest cost100 21 81 19 91 22 5 5 7 
Expected return on plan assets
(135)(56)(160)(59)(159)(50)— — — 
Amortization of prior service credit— (1)— (1)— (1)(2)(2)(2)
Amortization of net actuarial loss (gain)
21 12 46 25 70 16 (2)(1)— 
Settlements
53 9 55 — 61 — — — — 
Net periodic benefit cost*$162 13 168 20 201 15 5 7 10 
* Included in the “Operating expenses” and “Selling, general and administrative expenses” line items on our consolidated statement of operations.
Schedule of Weighted-Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Costs
The following weighted-average assumptions were used to determine benefit obligations and net periodic benefit costs for years ended December 31:

Pension BenefitsOther Benefits
 2022202120222021
 U.S.Int’l.U.S.Int’l.
Assumptions Used to Determine Benefit Obligations:
Discount rate5.70 %4.64 2.95 1.60 5.70 2.90 
Rate of compensation increase4.30 3.32 4.30 3.05 — — 
Interest crediting rate on cash balance plan
3.88 — 2.05 — — — 
Assumptions Used to Determine Net Periodic Benefit Cost:
Discount rate3.94 %1.65 2.70 1.27 2.90 2.30 
Expected return on plan assets6.50 4.90 6.50 4.86 — — 
Rate of compensation increase4.30 3.05 4.27 3.01 — — 
Interest crediting rate on cash balance plan
2.59 — 2.05 — — — 
Schedule of Fair Values of Pension Plan Assets
The fair values of our pension plan assets at December 31, by asset class, were:

 Millions of Dollars
U.S.International
 Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
2022
Equity securities$239 — — 239 — — — — 
Government debt securities268 — — 268 — — — — 
Corporate debt securities— 89 — 89 — — — — 
Cash and cash equivalents19 — — 19 64 — — 64 
Insurance contracts— — — — — — 13 13 
Total assets in the fair value hierarchy
526 89 — 615 64 — 13 77 
Common/collective trusts measured at NAV
841 567 
Real estate and infrastructure investments measured at NAV322 63 
Total$526 89 — 1,778 64 — 13 707 
 
 Millions of Dollars
U.S.International
 Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
2021
Equity securities$385 — — 385 — — — — 
Government debt securities427 — — 427 — — — — 
Corporate debt securities
— 131 — 131 — — — — 
Cash and cash equivalents20 — — 20 6 — — 6 
Insurance contracts— — — — — — 13 13 
Total assets in the fair value hierarchy
832 131 — 963 6 — 13 19 
Common/collective trusts measured at NAV
1,266 1,158 
Real estate and infrastructure investments measured at NAV318 103 
Total$832 131 — 2,547 6 — 13 1,280 
Expected Benefit Payments
The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid to plan participants in the years indicated:
 
 Millions of Dollars
Pension BenefitsOther Benefits
U.S.Int’l.
2023$266 21 17 
2024218 23 17 
2025217 25 17 
2026220 27 17 
2027231 28 17 
2028-20321,087 170 78