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Stockholders' Equity (Details) (USD $) | 0 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 06, 2014 | Feb. 07, 2014 | Aug. 06, 2013 | Feb. 07, 2013 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Jan. 31, 2014 | Oct. 31, 2014 | Oct. 31, 2013 | Oct. 31, 2012 | Dec. 15, 2011
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase program, maximum amount authorized |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 us-gaap_StockRepurchaseProgramAuthorizedAmount1
Number of shares purchased |  |  |  |  | 176,000 us-gaap_TreasuryStockSharesAcquired | 0 us-gaap_TreasuryStockSharesAcquired | 0 us-gaap_TreasuryStockSharesAcquired | 396,000 us-gaap_TreasuryStockSharesAcquired | 571,939 us-gaap_TreasuryStockSharesAcquired | 1,420,728 us-gaap_TreasuryStockSharesAcquired | 984,027 us-gaap_TreasuryStockSharesAcquired |
Cost of common stock repurchased |  |  |  |  | 25,800,000 us-gaap_TreasuryStockValueAcquiredCostMethod |  |  | 50,000,000 us-gaap_TreasuryStockValueAcquiredCostMethod | 75,778,000 us-gaap_TreasuryStockValueAcquiredCostMethod | 167,334,000 us-gaap_TreasuryStockValueAcquiredCostMethod | 71,150,000 us-gaap_TreasuryStockValueAcquiredCostMethod |
Share repurchase program, remaining authorized amount |  |  |  |  | 185,700,000 us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 |  |  |  | 185,700,000 us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 |  |  |
Average purchase price per share (usd per share) |  |  |  |  | $ 146.64 us-gaap_AcceleratedShareRepurchasesFinalPricePaidPerShare |  |  | $ 126.21 us-gaap_AcceleratedShareRepurchasesFinalPricePaidPerShare |  |  |  |
Dividends on common stock | 1,500,000 us-gaap_PaymentsOfDividendsCommonStock | 1,400,000 us-gaap_PaymentsOfDividendsCommonStock | 1,500,000 us-gaap_PaymentsOfDividendsCommonStock | 1,400,000 us-gaap_PaymentsOfDividendsCommonStock |  |  |  |  | 2,884,000 us-gaap_PaymentsOfDividendsCommonStock | 2,918,000 us-gaap_PaymentsOfDividendsCommonStock | 2,857,000 us-gaap_PaymentsOfDividendsCommonStock |
Cash dividend, per share (usd per share) | $ 0.03 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.03 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.03 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.03 us-gaap_CommonStockDividendsPerShareCashPaid |  |  |  |  | $ 0.03 us-gaap_CommonStockDividendsPerShareCashPaid |  |  |
Date of record | Jul. 24, 2014 | Jan. 24, 2014 | Jul. 24, 2013 | Jan. 25, 2013 |  |  |  |  |  |  |  |
Common stock purchase right versus preferred share purchase right |  |  |  |  |  |  |  |  | 0.5 coo_CommonStockPurchaseRightVersusPreferredSharePurchaseRight |  |  |
Percentage of acquisition of beneficial ownership |  |  |  |  |  |  |  |  | 20.00%coo_MinimumPercentageOfCommonStockToBeAcquiredInOrderToExerciseSharePurchaseRights |  |  |
Purchase price of the Right, subject to adjustment (usd per right) |  |  |  |  |  |  |  |  | $ 450 us-gaap_PaymentsForRepurchaseOfOtherEquity |  |  |
Percentage of assets or earning power sold |  |  |  |  |  |  |  |  | 50.00%coo_PercentageOfCommonStockSharesMergedOrAssetsOrEarningPowerSold |  |  |
Board of Directors may redeem the rights at, price per right |  |  |  |  | $ 0.01 us-gaap_SaleOfStockPricePerShare |  |  |  | $ 0.01 us-gaap_SaleOfStockPricePerShare |  |  |

X
- Definition Common stock purchase right versus preferred share purchase right. + References No definition available. + Details
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- Definition Minimum percentage of common stock to be acquired in order to exercise share purchase rights. + References No definition available. + Details
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- Definition Percentage of common stock shares merged or assets or earning power sold. + References No definition available. + Details
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- Definition Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. + References No definition available. + Details
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- Details
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- Definition The cash outflow to reacquire other equity not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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