Held For Sale (Details) - USD ($) $ in Millions	Jan. 31, 2017	Oct. 31, 2016
Major Classes of Assets and Liabilities Held For Sale at Estimated Fair Value
Assets held for sale	$ 53.3	$ 44.1
Liabilities held for sale	16.8	19.2
Disposal Group, Held-for-sale, Not Discontinued Operations | Government Services
Major Classes of Assets and Liabilities Held For Sale at Estimated Fair Value
Trade accounts receivable, net	41.7	31.9
Investments in unconsolidated affiliates	7.4	7.7
Other assets	4.2	4.5
Assets held for sale	53.3	44.1
Trade accounts payable	12.1	14.4
Other accrued liabilities	4.7	4.8
Liabilities held for sale	$ 16.8	$ 19.2