Post Retirement Benefit Plans - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Company's pension contributions	$ 14.4	$ 18.0	$ 32.6
Benefits paid by the company	1.4
Company's estimated pension contributions	13.2
Expected return on plan assets	5.70%
Transfer value	0
Fair value of plan assets	621.2	599.1
Class A Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Authorized Shares	128,000,000	128,000,000
Class B Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Authorized Shares	69,120,000	69,120,000
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Company's pension contributions	13.0
Amortization loss of prior service costs	10.4
Pension Plans, Defined Benefit [Member] | Class A Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Authorized Shares	247,504	247,504
Pension Plans, Defined Benefit [Member] | Class B Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Authorized Shares	160,710	160,710
401 (k) Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Company's pension contributions	6.5	3.9	3.6
Postretirement Health Care and Life Insurance Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Aggregated accumulated benefit obligation	18.5	0
Fair value of plan assets	$ 19.3	$ 0