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Employee Benefit Plans - Summary Of Allocation Of Pension Plan Assets (Details) | Sep. 30, 2020 | Sep. 30, 2019
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U.S. Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets, target allocation percentage | 100.00% | 100.00%
Non U.S. Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets, target allocation percentage | 100.00% | 100.00%
Equity Securities | U.S. Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets, target allocation percentage | 46.00% | 62.00%
Equity Securities | Non U.S. Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets, target allocation percentage | 0.00% | 0.00%
Fixed Income Securities | U.S. Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets, target allocation percentage | 51.00% | 35.00%
Fixed Income Securities | Non U.S. Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets, target allocation percentage | 19.00% | 20.00%
Other | U.S. Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets, target allocation percentage | 3.00% | 3.00%
Other | Non U.S. Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets, target allocation percentage | 81.00% | 80.00%

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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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