Supplemental Information (Unaudited) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Supplemental Information (Unaudited)
Revenues	$ 541.5	$ 538.6	$ 526.9	$ 487.2	$ 506.5	$ 493.4	$ 475.0	$ 476.8	$ 2,094.2	$ 1,951.7	$ 1,895.8
Interest expense	117.1	109.8	105.6	89.6	80.8	78.8	77.7	74.6	422.1	311.9	281.1
Operating expenses	302.2	287.4	312.6	249.7	239.8	216.7	214.1	202.3	1,151.9	872.9	811.8
Provision for income taxes	40.9	51.2	39.3	48.9	64.4	71.1	67.7	66.7	180.3	269.9	260.6
Equity in income of unconsolidated affiliate	0.4	0.2	0.2	0.8	0.3	0.1	0.4	0.4	1.6	1.2	1.9
Net loss attributable to noncontrolling interests				(0.1)					(0.1)
Net income attributable to the Company	$ 81.7	$ 90.4	$ 69.6	$ 99.9	$ 121.8	$ 126.9	$ 115.9	$ 133.6	$ 341.6	$ 498.2	$ 544.2