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Disposition (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 14, 2016 | Mar. 31, 2018 | Apr. 01, 2017 | Mar. 31, 2018 | Apr. 01, 2017 | Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from sale of business |  |  |  | $ 0.0 | $ 1,865.0 |
Gain on sale of business |  | $ 0.0 | $ 899.7 | 0.0 | 899.7 |
Blood Screening Business [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Gross proceeds on sale | $ 1,850.0 |  |  |  |  |
Proceeds from sale of business |  |  | 1,865.0 |  |  |
Gain on sale of business |  |  | 899.7 |  |  |
Tax obligation for Blood Screening |  |  |  |  |  | $ 649.5
Proceeds allocated to manufacture of inventory |  |  |  |  |  | $ 13.1
Disposal Group, Including Discontinued Operation, Revenue |  | $ 11.3 | 31.3 | 23.9 | $ 96.5 |
Disposal Group, Including Discontinued Operation, Operating Income (Loss) |  |  | $ 17.3 | $ 45.8 |  |
Blood Screening Business [Member] | Grifols [Member] | Minimum |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Disposal Group, Including Discontinued Operations, Period to Provide Transition Services After Disposal |  |  | 2 years |  |  |
Blood Screening Business [Member] | Grifols [Member] | Maximum |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Disposal Group, Including Discontinued Operations, Period to Provide Transition Services After Disposal |  |  | 3 years |  |  |

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