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Discontinued Operations, Assets Held for Sale and Divestitures Disposal Group, Detail of Gain on Sale - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016 | Jan. 06, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  |  |  |  | $ 305.7
Discontinued Operations, Receivable from Buyer of Discontinued Operation |  |  |  |  | 1.9
Total proceeds |  |  |  |  | 307.6
Transaction expenses |  |  |  |  | (8.3)
Net proceeds |  |  |  |  | 299.3
Assets and liabilities disposed |  |  |  |  | $ (189.8)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax | $ 109.5 |  |  |  |
Income tax on Gain on Sale | (41.6) |  |  |  |
Gain on sale, net of tax | $ 67.9 | $ 0.0 | $ 67.9 | $ 0.0 |

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