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Employee Benefit Plans (Tables) | 6 Months Ended
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Mar. 31, 2018
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract] |
Net Periodic Benefit Costs | Net periodic benefit costs for our defined benefit pension plans are as follows:
|  | Three Months Ended |  | Six Months Ended
|  | March 31, 2018 |  | April 1, 2017 |  | March 31, 2018 |  | April 1, 2017
U.S. Plans |  |  |  |  |  |  |  |
Service cost |  | $ | 5,633 |  |  | $ | 6,021 |  |  | $ | 11,267 |  |  | $ | 12,043 |
Interest cost |  | 8,073 |  |  | 7,635 |  |  | 16,146 |  |  | 15,271 |
Expected return on plan assets |  | (13,575 | ) |  | (13,627 | ) |  | (27,151 | ) |  | (27,255 | )
Amortization of prior service cost (credit) |  | 47 |  |  | 47 |  |  | 94 |  |  | 94 |
Amortization of actuarial loss |  | 6,902 |  |  | 8,419 |  |  | 13,804 |  |  | 16,838 |
Pension expense for U.S. defined benefit plans |  | $ | 7,080 |  |  | $ | 8,495 |  |  | $ | 14,160 |  |  | $ | 16,991 |
Non-U.S. Plans |  |  |  |  |  |  |  |
Service cost |  | $ | 1,519 |  |  | $ | 1,514 |  |  | $ | 2,989 |  |  | $ | 3,046 |
Interest cost |  | 1,092 |  |  | 746 |  |  | 2,147 |  |  | 1,497 |
Expected return on plan assets |  | (1,290 | ) |  | (1,122 | ) |  | (2,533 | ) |  | (2,253 | )
Amortization of prior service cost (credit) |  | (15 | ) |  | (27 | ) |  | (29 | ) |  | (54 | )
Amortization of actuarial loss |  | 648 |  |  | 1,109 |  |  | 1,272 |  |  | 2,229 |
Pension expense for non-U.S. defined benefit plans |  | $ | 1,954 |  |  | $ | 2,220 |  |  | $ | 3,846 |  |  | $ | 4,465 |
Defined Contribution Plan Disclosures | Pension expense for our defined contribution plans consists of:
|  | Three Months Ended |  | Six Months Ended
|  | March 31, 2018 |  | April 1, 2017 |  | March 31, 2018 |  | April 1, 2017
U.S. defined contribution plans |  | $ | 4,136 |  |  | $ | 3,586 |  |  | $ | 8,108 |  |  | $ | 7,256 |
Non-U.S. defined contribution plans |  | 1,550 |  |  | 1,472 |  |  | 3,259 |  |  | 2,832 |
Total pension expense for defined contribution plans |  | $ | 5,686 |  |  | $ | 5,058 |  |  | $ | 11,367 |  |  | $ | 10,088 |

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- Definition Tabular disclosure of defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + 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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