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Acquisitions Schedule of Restructuring Accrual Rollforward (Details) - USD ($) $ in Millions | 9 Months Ended |
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Jun. 30, 2017 | Jun. 30, 2016 | Sep. 30, 2016
Schedule Of Restructuring Accrual Rollforward [Line Items] |  |  |
Restructuring Reserve | $ 10.0 |  | $ 2.6
Increase (Decrease) in Restructuring Reserve | 9.8 |  |
Payments for Restructuring | 2.4 |  |
Non Cash Restructuring And Related Charges |  | $ (3.3) |
Special Termination Benefits [Member] |  |  |
Schedule Of Restructuring Accrual Rollforward [Line Items] |  |  |
Restructuring Reserve | 5.3 |  | 1.6
Increase (Decrease) in Restructuring Reserve | 5.7 |  |
Payments for Restructuring | 2.0 |  |
Other Restructuring [Member] |  |  |
Schedule Of Restructuring Accrual Rollforward [Line Items] |  |  |
Restructuring Reserve | 4.7 |  | $ 1.0
Increase (Decrease) in Restructuring Reserve | 4.1 |  |
Payments for Restructuring | $ 0.4 |  |

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- Definition Total amount of non-cash restructuring, and related charges. + References No definition available. + Details
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- Definition [Line Items] for Schedule Of Restructuring Accrual Rollforward [Table] + References No definition available. + Details
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- Definition The increase (decrease) during the period in the carrying amount (including both current and noncurrent portions of the accrual) of the liability pertaining to the exit from or disposal of business activities or restructuring pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination and to asset retirement obligations. + References No definition available. + Details
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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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