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Pension Benefit Obligations (Tables) | 6 Months Ended
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Mar. 31, 2018
Pension Benefit Obligations |
Components of net periodic cost for the Company's pension plans |
|  | Three Months Ended |  | Six Months Ended |
|  | March 31, 2018 |  | March 31, 2017 |  | March 31, 2018 |  | March 31, 2017 |
|  | U.S. |  | Int’l |  | U.S. |  | Int’l |  | U.S. |  | Int’l |  | U.S. |  | Int’l |
|  | (in millions) |
Components of net periodic (benefit) cost: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service costs |  | $ | 1.2 |  | $ | 0.3 |  | $ | 1.1 |  | $ | 0.3 |  | $ | 2.4 |  | $ | 0.6 |  | $ | 2.2 |  | $ | 0.6 |
Interest cost on projected benefit obligation |  | 5.2 |  | 8.3 |  | 4.8 |  | 6.9 |  | 10.4 |  | 16.2 |  | 9.6 |  | 13.9 |
Expected return on plan assets |  | (7.8 | ) | (11.1 | ) | (7.7 | ) | (10.1 | ) | (15.7 | ) | (21.8 | ) | (15.5 | ) | (20.3 | )
Amortization of prior service cost |  | — |  | (0.1 | ) | — |  | — |  | — |  | (0.1 | ) | — |  | (0.1 | )
Amortization of net loss |  | 1.0 |  | 2.2 |  | 1.1 |  | 3.2 |  | 2.0 |  | 4.2 |  | 2.2 |  | 6.4 |
Settlement loss recognized |  | — |  | 0.1 |  | — |  | — |  | — |  | 0.2 |  | — |  | — |
Net periodic (benefit) cost |  | $ | (0.4 | ) | $ | (0.3 | ) | $ | (0.7 | ) | $ | 0.3 |  | $ | (0.9 | ) | $ | (0.7 | ) | $ | (1.5 | ) | $ | 0.5 |

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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=65897934&loc=d3e1928-114920 + Details
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