Post Retirement Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Company's pension contributions	$ 18,000,000	$ 32,600,000	$ 23,000,000
Expected contribution during next fiscal year	13,100,000
Expected return on plan assets	0.065
Fair value of plan assets	599,100,000	540,300,000
Class A Common Stock [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Authorized Shares	128,000,000	128,000,000
Class B Common Stock [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Authorized Shares	69,120,000	69,120,000
Postretirement Health Care and Life Insurance Benefits [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Aggregated accumulated benefit obligation	19,300,000	20,800,000
Fair value of plan assets	0	0
401 (k) Savings Plan [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Company's pension contributions	3,900,000	3,600,000	2,900,000
Pension Plans, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Company's pension contributions	18,000,000	32,600,000
Expected return on plan assets	33,900,000	36,800,000	34,800,000
Amortization loss of prior service costs	16,400,000
Aggregated accumulated benefit obligation	687,800,000	589,100,000
Fair value of plan assets	$ 599,100,000	$ 540,300,000	$ 514,700,000
Pension Plans, Defined Benefit [Member] \| Class A Common Stock [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Authorized Shares	247,504	247,504
Pension Plans, Defined Benefit [Member] \| Class B Common Stock [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Authorized Shares	160,710	160,710

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

+ References+ Details

The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512136

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Glossary Expected Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512171

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 87

-Paragraph 264

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)(3)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 106

-Paragraph 518

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References+ Details