Discontinued Operations - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Jan. 31, 2017	Jan. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Net (loss) income from discontinued operations	$ (72.9)	$ 0.4
Loss from discontinued operations pretax	$ 123.1

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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