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Adoption of New Accounting Standards (Details) $ in Millions	3 Months Ended
	Jan. 31, 2018 USD ($)
Adoption of New Accounting Pronouncement [Line Items]
Tax benefit related to the exercise of stock options and vesting of restricted stock	$ 11.9
Accounting Standards Update 2016-09 [Member]
Adoption of New Accounting Pronouncement [Line Items]
Tax benefit related to the exercise of stock options and vesting of restricted stock	11.9
Retrospective adjustment of excess tax benefits related to stock options exercises and restricted stock vesting from financing cash flows to operating cash flows	5.7
Cumulative effect adjustment upon adoption of new accounting standard (ASU 2016-09)	$ 0.5

Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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