Stockholders' Equity (Details) - USD ($)			1 Months Ended		2 Months Ended	3 Months Ended		9 Months Ended
	Sep. 01, 2016	Jan. 07, 2015	Apr. 22, 2016	Jan. 28, 2016	Jul. 29, 2016	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding, Beginning Balance								80,883,000
Common Stock, Value, Issued, Beginning Balance								$ 721,419,000
Issued to participants in the Employee Stock Purchase Plan (ESPP) (in shares)								17,000
Issued to participants in the Employee Stock Purchase Plan (ESPP)								$ 962,000
Issued to participants in the Dividend Reinvestment and Stock Purchase Plan (in shares)								253,000
Issued to participants in the Dividend Reinvestment and Stock Purchase Plan (DRIP)								$ 14,352,000
Issued to participants in the Incentive Compensation Plan (ICP) (in shares)								130,000
Issued to participants in the ICP								$ 7,486,000
Costs from issuance of common stock								$ (88,000)	$ (362,000)
Common Stock, Shares, Outstanding, Ending Balance						81,283,000		81,283,000
Common Stock, Value, Issued, Ending Balance						$ 744,131,000		$ 744,131,000
ATM Sales Agreement Aggregate Amount		$ 170,000,000
ATM Sales Agreement Commission Percentage								1.50%
Cash dividends paid per share of common stock (usd per share)						$ 0.34	$ 0.33	$ 1.01	$ 0.98
Forward Contract Indexed to Issuer's Equity [Line Items]
Forward Contract Indexed to Issuer's Equity, Settlement Alternatives								Under the terms of these FSAs, at our election, we may physically settle in shares, cash or net settle for all or a portion of our obligation under the agreements.
Forward Contract Indexed to Issuer's Equity, Shares			620,000	360,000	820,000
Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share			$ 59.66	$ 57.90	$ 59.79
Initial Forward Price Per Share			$ 58.76	$ 57.04	$ 58.89
Forward Contract Indexed to Issuer's Equity, Classification								we classified the FSAs as of July 31, 2016 as equity transactions because the forward sale transactions were indexed to our own stock and physical settlement was within our control
Forward Contract Amount Recorded in Consolidated Financial Statements						$ 0		$ 0
Forward Contract Indexed to Issuer's Equity, Indexed Shares						1,800,000.0		1,800,000.0
Forward Contract Indexed to Issuer's Equity, Settlement Alternatives, Cash, at Fair Value						$ 104,700,000		$ 104,700,000
Common Stock Issued								22,800,000	$ 24,248,000
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from equity method investments						(4,238,000)	$ (5,801,000)	(28,025,000)	(29,908,000)
Income taxes						1,876,000	2,097,000	11,089,000	11,277,000
Net income						6,730,000	8,260,000	(154,492,000)	(151,120,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated OCIL beginning balance, net of tax						(640,000)	(970,000)	(855,000)	(237,000)
Total other comprehensive income (loss)						296,000	342,000	511,000	(391,000)
Accumulated OCIL ending balance, net of tax						(344,000)	(628,000)	(344,000)	(628,000)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income						194,000	309,000	871,000	836,000
Subsequent Event
Forward Contract Indexed to Issuer's Equity [Line Items]
Subsequent Event, Description	On September 1, 2016, we issued 1.8 million shares of our common stock to the forward counterparties in order to physically settle all of the FSAs entered into during 2016 and received net proceeds of $104.7 million. In September 2016, we recorded this amount in "Stockholders' equity" as an addition to "Common stock" in the Condensed Consolidated Balance Sheets. Upon settlement, we used the net proceeds from the FSA transactions to finance capital expenditures, repay outstanding short-term, unsecured notes under our CP program and for general corporate purposes. We do not expect to enter into another FSA through the remainder of this fiscal year.
Forward Contract Indexed to Issuer's Equity, Settlement Date	Sep. 01, 2016
Subsequent Event | Combined Forward Sale Agreements [Member]
Forward Contract Indexed to Issuer's Equity [Line Items]
Stock Issued During Period, Shares, New Issues	1,800,000
Common Stock Issued	$ 104,700,000
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
OCIL before reclassifications, net of tax						102,000	33,000	(360,000)	(1,227,000)
Amounts reclassified from accumulated OCIL, net of tax						206,000	307,000	881,000	872,000
Total other comprehensive income (loss)						308,000	340,000	521,000	(355,000)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from equity method investments						330,000	505,000	1,438,000	1,430,000
Income taxes						(124,000)	(198,000)	(557,000)	(558,000)
Net income						206,000	307,000	881,000	872,000
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total other comprehensive income (loss)						(12,000)	2,000	(10,000)	(36,000)
Accumulated Defined Benefit Plans Adjustment | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from equity method investments						(19,000)	3,000	(15,000)	(60,000)
Income taxes						7,000	(1,000)	5,000	24,000
Net income						$ (12,000)	$ 2,000	$ (10,000)	$ (36,000)