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Restructuring And Related Charges (Summary Of Costs Incurred And Cumulative Costs By Cost Type) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and related charges | $ 25.4 | $ 21.2 | $ 69.0 | $ 31.3
Cumulative costs | 134.6 |  | 134.6 |
Future costs to be incurred | 16.4 |  | 16.4 |
Termination Benefits [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and related charges | 1.6 | 2.4 | 6.8 | 4.5
Cumulative costs | 17.8 |  | 17.8 |
Future costs to be incurred | 0.4 |  | 0.4 |
Other Costs [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and related charges | 23.8 | $ 18.8 | 62.2 | $ 26.8
Cumulative costs | 116.8 |  | 116.8 |
Future costs to be incurred | $ 16.0 |  | $ 16.0 |

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