Supplemental Information (Unaudited) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Supplemental Information (Unaudited)
Revenues	$ 521.9	$ 487.6	$ 454.5	$ 431.8	$ 476.4	$ 451.7	$ 431.3	$ 408.1	$ 1,895.8	$ 1,767.5	$ 1,674.6
Interest expense	74.6	69.0	63.4	74.1	84.4	85.0	95.3	87.5	281.1	352.2	455.6
Operating expenses	213.5	218.1	196.7	183.5	186.9	170.0	166.9	165.7	811.8	689.5	619.9
Provision for income taxes	79.9	71.6	70.6	38.5	72.3	72.2	63.7	50.2	260.6	258.4	217.8
Equity in income of unconsolidated affiliate	0.3	0.3	0.5	0.8	0.1	0.2	0.5	0.3	1.9	1.1	1.4
Net income attributable to the Company	$ 154.2	$ 129.2	$ 124.3	$ 136.5	$ 132.9	$ 124.7	$ 105.9	$ 105.0	$ 544.2	$ 468.5	$ 382.7