Short Term Debt (Details) (USD $)	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Line Of Credit Facility [Line Items]
Credit Facility Maximum Amount Outstanding During Period	$ 555,000,000
Credit Facility Minimum Amount Outstanding During Period	220,000,000
Short-term debt	400,000,000	365,000,000
Maximum [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility Interest Rate During Period	1.12%
Minimum [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility Interest Rate During Period	0.23%
Weighted Average [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility Interest Rate During Period	0.32%
Letter Of Credit [Member]
Line Of Credit Facility [Line Items]
Credit Facility Current Borrowing Capacity	10,000,000	10,000,000
Credit Facility Amount Outstanding	2,100,000	3,600,000
Revolving Credit Facility [Member]
Line Of Credit Facility [Line Items]
Credit Facility Current Borrowing Capacity	650,000,000
Maximum Facility	850,000,000
Line Of Credit Commitment Annual Fee	35,000 plus 8.5 basis points
Line Of Credit Facility Frequency Of Commitment Fee Payment	Annual
Maximum Unused Amount On Which Fees Are Payable	650,000,000
Credit Facility Interest Rate Description	30-day LIBOR rate plus from 75 to 125 basis points
Credit Facility Covenant Terms	total debt to total capitalization of no greater than 70%
Credit Facility Covenant Compliance	actual ratio was 59%
Credit Facility Maximum Amount Outstanding During Period	10,000,000
Credit Facility Minimum Amount Outstanding During Period	0
Line of Credit Facility, Expiration Date	Oct. 01, 2017
Short-term Debt, Description	$650 million five-year revolving syndicated credit facility that expires on October 1, 2017. The facility has an option to request an expansion of up to $850 million. On November 1, 2013, we entered into an agreement with the lenders under the facility which increased our borrowing capacity to $850 million. We pay an annual fee of $35,000 plus 8.5 basis points for any unused amount. The facility provides a line of credit for letters of credit of $10 million These letters of credit are used to guarantee claims from self-insurance under our general and automobile liability policies. The credit facility bears interest based on the 30-day London Interbank Offered Rate (LIBOR) plus from 75 to 125 basis points, based on our credit ratings. Amounts borrowed are continuously renewable until the expiration of the facility in 2017 provided that we are in compliance with all terms of the agreement.
Revolving Credit Facility [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility Interest Rate During Period	1.12%
Revolving Credit Facility [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility Interest Rate During Period	1.12%
Revolving Credit Facility [Member] | Weighted Average [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility Interest Rate During Period	1.12%
Commercial Paper [Member]
Line Of Credit Facility [Line Items]
Credit Facility Current Borrowing Capacity	650,000,000
Maximum Facility	850,000,000
Credit Facility Interest Rate Description	interest based on, among other things, the size and maturity date of the note, the frequency of the issuance and our credit ratings, plus a spread of 5 basis points
Weighted Average Interest Rate	0.36%	0.42%
Credit Facility Maximum Amount Outstanding During Period	555,000,000
Credit Facility Minimum Amount Outstanding During Period	220,000,000
Commercial Paper	$ 400,000,000	$ 365,000,000
Short-term Debt, Description	$650 million unsecured CP program that is backstopped by the revolving syndicated credit facility. In conjunction with the exercise of the option in November 2013, the amounts outstanding under the revolving syndicated credit facility and the CP program, either individually or in the aggregate, have been increased to, but cannot exceed, $850 million. The notes issued under the CP program may have maturities not to exceed 397 days from the date of issuance and bear interest based on, among other things, the size and maturity date of the note, the frequency of the issuance and our credit ratings, plus a spread of 5 basis points. Any borrowings under the CP program rank equally with our other unsubordinated and unsecured debt. The notes under the CP program are not registered and are offered and issued pursuant to an exemption from registration.
Maximum Number Of Possible Days Outstanding For Commerical Paper Program	397 days
Commercial Paper [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility Interest Rate During Period	0.45%
Number Days Outstanding From Issuance Until Maturity	37 days
Commercial Paper [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility Interest Rate During Period	0.23%
Number Days Outstanding From Issuance Until Maturity	1 day
Commercial Paper [Member] | Weighted Average [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility Interest Rate During Period	0.32%