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Benefit Plans (Tables) | 6 Months Ended
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Mar. 31, 2024
Retirement Benefits [Abstract] |
Net Pension and Postretirement Cost | Net pension cost included the following components for the three and six-month periods:
| Three Months Ended March 31, |  | Six Months Ended March 31,
(Millions of dollars) | 2024 |  | 2023 |  | 2024 |  | 2023
Service cost | $ | 22 |  |  | $ | 22 |  |  | $ | 47 |  |  | $ | 46 |
Interest cost | 35 |  |  | 32 |  |  | 74 |  |  | 67 |
Expected return on plan assets | (38) |  |  | (35) |  |  | (80) |  |  | (73) |
Amortization of prior service credit | (1) |  |  | (2) |  |  | (2) |  |  | (3) |
Amortization of loss | 14 |  |  | 15 |  |  | 30 |  |  | 32 |
Settlement loss | — |  |  | 1 |  |  | — |  |  | 1 |
Net pension cost | $ | 33 |  |  | $ | 34 |  |  | $ | 69 |  |  | $ | 70 |

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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 -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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