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Employee Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2022
Retirement Benefits [Abstract] |
Schedule of Components of Net Periodic Benefit Cost |
| Millions of Dollars
| Pension Benefits |  | Other Benefits
| 2022 |  | 2021 |  | 2022 |  | 2021
| U.S. |  | Int'l. |  | U.S. |  | Int'l. |  |  |  |
Components of Net Periodic Benefit Cost |  |  |  |  |  |  |  |  |  |  |
Three Months Ended June 30 |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 16 |  |  | 13 |  |  | 18 |  |  | 16 |  |  | 1 |  |  | 1
Interest cost | 12 |  |  | 21 |  |  | 15 |  |  | 20 |  |  | 1 |  |  | 1 |
Expected return on plan assets | (13) |  |  | (34) |  |  | (20) |  |  | (30) |  |  | — |  |  | — |
Amortization of prior service credit | — |  |  | — |  |  | — |  |  | — |  |  | (10) |  |  | (10) |
Recognized net actuarial loss | 5 |  |  | 2 |  |  | 12 |  |  | 8 |  |  | — |  |  | 1 |
Settlements | 18 |  |  | — |  |  | 42 |  |  | — |  |  | — |  |  | — |
Net periodic benefit cost | $ | 38 |  |  | 2 |  |  | 67 |  |  | 14 |  |  | (8) |  |  | (7) |
Six Months Ended June 30 |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 32 |  |  | 26 |  |  | 39 |  |  | 31 |  |  | 1 |  |  | 1 |
Interest cost | 24 |  |  | 42 |  |  | 28 |  |  | 40 |  |  | 2 |  |  | 2 |
Expected return on plan assets | (26) |  |  | (68) |  |  | (44) |  |  | (60) |  |  | — |  |  | — |
Amortization of prior service credit | — |  |  | — |  |  | — |  |  | — |  |  | (20) |  |  | (19) |
Recognized net actuarial loss | 11 |  |  | 4 |  |  | 27 |  |  | 16 |  |  | — |  |  | 1 |
Settlements | 22 |  |  | — |  |  | 44 |  |  | — |  |  | — |  |  | — |
Curtailments | — |  |  | — |  |  | 12 |  |  | — |  |  | — |  |  | — |
Special Termination Benefits | — |  |  | — |  |  | 9 |  |  | — |  |  | — |  |  | — |
Net periodic benefit cost | $ | 63 |  |  | 4 |  |  | 115 |  |  | 27 |  |  | (17) |  |  | (15) |
Schedule of Discount Rates | The relevant discount rates are summarized in the following table:
| June 30 2022 | December 31 2021
Relevant discount rates |  |
U.S. qualified pension plan | 4.85 | % | 2.85 |
U.S. nonqualified pension plan | 4.70 |  | 2.50 |

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- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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