Commitments and Contingencies - Lease and Other Similar Commitments (Details) $ in Millions	Oct. 31, 2018 USD ($)
Capital
October 31, 2019	$ 3.3
October 31, 2020	3.2
October 31, 2021	2.6
October 31, 2022	1.2
October 31, 2023	0.5
Thereafter	0.0
Total minimum lease commitments	10.9
Operating and Other
October 31, 2019	80.7	[1]
October 31, 2020	59.7	[1]
October 31, 2021	54.2	[1]
October 31, 2022	49.0	[1]
October 31, 2023	38.5	[1]
Thereafter	85.5	[1]
Total minimum lease commitments	367.6	[1]
Estimated future sublease rental income	$ 19.5

[1] Includes total estimated sublease rental income of $19.5 million.