Stock Based Compensation Plans (Other Plans) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Jan. 31, 2015	Oct. 31, 2014 StkUnits
Employee Stock Purchase Plan
Nov-Voting stock reserved for issuance under the Qualified ESPP		400,000
Nov-Voting stock reserved for issuance under the Nonqualified ESPP		65,000
Cumulative non-voting stock issued under the Qualified and Nonqualified Employee Stock Purchase Plans		100,000
Nov-Voting stock reserved for issuance under the Incentive ESPP		300,000
Cumulative non-voting stock issued under the Incentive Plan Stock Alternative		100,000
Stock Option Income Deferral Plan
Total shares exercised and placed in trust with the Company		200,000
Atlanta Capital Plan [Member]
Acm Ppa [Line Items]
Profit units issued during the year	25,246	28,000
Weighted-average per unit price	$ 142.47	$ 128.23
Compensation cost related to profit units issued under the plan, not yet recognized		$ 5.5
Weighted-average period over which compensation cost related to profit units issued is expected to be recognized (in years)		3 years 4 months
Cumulative profit units granted		241,200
Parametric Plan [Member]
Acm Ppa [Line Items]
Profit units issued during the year	3,445	2,500
Weighted-average per unit price	$ 2,196.10	$ 1,977.65
Compensation cost related to profit units issued under the plan, not yet recognized		$ 8.3
Weighted-average period over which compensation cost related to profit units issued is expected to be recognized (in years)		2 years 10 months
Cumulative profit units granted		32,000