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Pension and Postretirement Plans (Tables) | 6 Months Ended
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Mar. 31, 2018
Defined Benefit Plan [Abstract] |
Components of Net Periodic Benefit Cost | The components of the Company’s net periodic benefit costs from continuing operations associated with its defined benefit pension and postretirement plans are shown in the tables below in accordance with ASC 715, "Compensation – Retirement Benefits" (in millions):
| U.S. Pension Plans
| Three Months Ended March 31, |  | Six Months Ended March 31,
| 2018 |  | 2017 |  | 2018 |  | 2017
Service cost | $ | 3 |  |  | $ | 4 |  |  | $ | 7 |  |  | $ | 9 |
Interest cost | 27 |  |  | 29 |  |  | 53 |  |  | 57 |
Expected return on plan assets | (57 | ) |  | (58 | ) |  | (114 | ) |  | (117 | )
Net actuarial gain | — |  |  | (18 | ) |  | — |  |  | (135 | )
Settlement gain | — |  |  | (1 | ) |  | — |  |  | (9 | )
Net periodic benefit credit | $ | (27 | ) |  | $ | (44 | ) |  | $ | (54 | ) |  | $ | (195 | )
| Non-U.S. Pension Plans
| Three Months Ended March 31, |  | Six Months Ended March 31,
| 2018 |  | 2017 |  | 2018 |  | 2017
Service cost | $ | 6 |  |  | $ | 8 |  |  | $ | 12 |  |  | $ | 16 |
Interest cost | 15 |  |  | 11 |  |  | 29 |  |  | 23 |
Expected return on plan assets | (29 | ) |  | (22 | ) |  | (58 | ) |  | (45 | )
Net periodic benefit credit | $ | (8 | ) |  | $ | (3 | ) |  | $ | (17 | ) |  | $ | (6 | )
| Postretirement Benefits
| Three Months Ended March 31, |  | Six Months Ended March 31,
| 2018 |  | 2017 |  | 2018 |  | 2017
Service cost | $ | 1 |  |  | $ | — |  |  | $ | 1 |  |  | $ | 1 |
Interest cost | 1 |  |  | 2 |  |  | 3 |  |  | 3 |
Expected return on plan assets | (3 | ) |  | (2 | ) |  | (5 | ) |  | (5 | )
Net periodic benefit credit | $ | (1 | ) |  | $ | — |  |  | $ | (1 | ) |  | $ | (1 | )

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- References No definition available. + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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