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Restructuring and Integration Costs (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2016 | Apr. 30, 2015 | Apr. 30, 2016 | Apr. 30, 2015 | Oct. 31, 2015 | Oct. 31, 2014
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and related activities, completion date |  |  | Oct. 31, 2016 |  |  |
Sauflon [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and related cost, expected cost | $ 125.0 |  | $ 125.0 |  |  |
Additions during the period |  |  | 15.7 |  | $ 55.6 | $ 36.1
Integration costs | 2.1 | $ 8.0 | 10.0 | $ 14.1 |  |
Sauflon [Member] | Product Rationalization [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and related cost, expected cost | 95.0 |  | 95.0 |  |  |
Additions during the period |  |  | 14.7 |  | 57.7 | 15.3
Sauflon [Member] | Product Rationalization [Member] | Cost of sales [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Additions during the period | 4.2 | 5.2 | 14.7 | 13.9 |  |
Sauflon [Member] | Employee Severance [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and related cost, expected cost | 27.0 |  | 27.0 |  |  |
Additions during the period |  |  | 0.7 |  | (2.5) | 20.3
Sauflon [Member] | Employee Severance [Member] | Cost of sales [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Additions during the period | 0.7 |  | 0.5 |  |  |
Sauflon [Member] | Employee Severance [Member] | Selling, general and administrative expense [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Additions during the period |  | (4.5) | 0.1 |  |  |
Sauflon [Member] | Employee Severance [Member] | Research and development expense [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Additions during the period |  | $ 0.2 | 0.1 | $ 0.3 |  |
Sauflon [Member] | Facility Closing [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and related cost, expected cost | $ 3.0 |  | 3.0 |  |  |
Additions during the period |  |  | 0.3 |  | $ 0.4 | $ 0.5
Sauflon [Member] | Facility Closing [Member] | Selling, general and administrative expense [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Additions during the period |  |  | $ 0.3 |  |  |

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