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Stock Based Compensation Plans (Other Plans) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
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12 Months Ended |
|
Oct. 31, 2011
|
| Employee Stock Purchase Plan |
|
| Nov-Voting stock reserved for issuance under the Employee Stock Purchase Plan |
9.0 |
| Cumulative non-voting stock issued under the Employee Stock Purchase Plan |
7.9 |
| Incentive Plan Stock Alternative |
|
| Nov-Voting stock reserved for issuance under the Incentive Plan Stock Alternative |
4.8 |
| Cumulative non-voting stock issued under the Incentive Plan Stock Alternative |
3.8 |
| Stock Option Income Deferral Plan |
|
| Total shares exericsed and placed in trust with the Company |
0.2 |
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Acm Plan [Member]
|
|
| Acm Ppa [Line Items] |
|
| Profit units issued during the year |
38,500 |
| Weighted-average per unit price |
29.90 |
| Compensation cost related to profit units issued under the plan, not yet recognized |
1.9 |
| Weighted-average period over which compensation cost related to profit units issued is expected to be recognized (in years) |
3.3 |
| Cumulative profit units granted |
148,200 |
|
Ppa Plan [Member]
|
|
| Acm Ppa [Line Items] |
|
| Profit units issued during the year |
7,400 |
| Weighted-average per unit price |
543.32 |
| Compensation cost related to profit units issued under the plan, not yet recognized |
5.4 |
| Weighted-average period over which compensation cost related to profit units issued is expected to be recognized (in years) |
3.6 |
| Cumulative profit units granted |
17,500 |