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Retirement Benefits (Schedule of Assumptions Used) (Details) | 12 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
United States Pension Plans of US Entity, Defined Benefit [Member] |  |  |
Weighted-average assumptions to determine benefit obligation at September 30: |  |  |
Discount rate | 4.40% | 5.15% | 4.10%
Rate of compensation increase | 3.50% | 3.50% | 3.50%
Weighted-average assumptions to determine periodic benefit costs for years ending September 30: |  |  |
Discount rate | 5.15% | 4.10% | 5.55%
Rate of compensation increase | 3.50% | 3.50% | 4.00%
Long-term rate of return on plan assets | 7.62% | 7.59% | 7.89%
United Kingdom Plan, Defined Benefit [Member] |  |  |
Weighted-average assumptions to determine benefit obligation at September 30: |  |  |
Discount rate | 4.10% | 4.50% | 4.60%
Rate of compensation increase | 3.50% | 3.50% | 3.90%
Weighted-average assumptions to determine periodic benefit costs for years ending September 30: |  |  |
Discount rate | 4.50% | 4.60% | 5.10%
Rate of compensation increase | 3.50% | 3.90% | 4.30%
Long-term rate of return on plan assets | 5.50% | 5.50% | 6.00%
Japan Plan, Defined Benefit [Member] |  |  |
Weighted-average assumptions to determine benefit obligation at September 30: |  |  |
Discount rate | 1.10% | 1.25% | 1.50%
Rate of compensation increase | 2.00% | 2.00% | 2.00%
Weighted-average assumptions to determine periodic benefit costs for years ending September 30: |  |  |
Discount rate | 1.25% | 1.50% | 1.50%
Rate of compensation increase | 2.00% | 2.00% | 2.00%
Long-term rate of return on plan assets | 3.00% | 2.80% | 2.80%
Switzerland Plan, Defined Benefit [Member] |  |  |
Weighted-average assumptions to determine benefit obligation at September 30: |  |  |
Discount rate |  | 2.25% | 1.75%
Rate of compensation increase |  | 2.00% | 2.00%
Weighted-average assumptions to determine periodic benefit costs for years ending September 30: |  |  |
Discount rate | 2.25% | 1.75% | 2.50%
Rate of compensation increase | 2.00% | 2.00% | 2.00%
Long-term rate of return on plan assets | 2.25% | 1.75% | 2.50%
Other Postretirement Benefit Plans, Defined Benefit [Member] |  |  |
Weighted-average assumptions to determine benefit obligation at September 30: |  |  |
Discount rate | 4.40% | 5.14% | 4.11%
Weighted-average assumptions to determine periodic benefit costs for years ending September 30: |  |  |
Discount rate | 5.14% | 4.11% | 5.54%

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- Definition The interest rate used to adjust for the time value of money for the plan. + 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 (k)(1) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + 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 (k)(2) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512013 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + 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 (k)(2) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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