2.2.0.7 false Shareholders Equity (Details) (USD $) 0608 - Disclosure - Shareholders Equity (Details) true false In Millions, except Share data false false 1 USD false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 2 USD false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 3 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 4 false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 false 5 false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 3 Shareholders' Equity (Textuals) 1 cbe_ShareholdersEquityTextualsAbstract cbe false na duration Shareholders Equity Textuals Abstract. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string Shareholders Equity Textuals Abstract. false 4 Common shares issued and outstanding 2 us-gaap_CommonStockSharesIssued us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 166743287 166743287 false false false 3 false true false false 167316595 167316595 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:sharesItemType shares Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 false 5 Common stock, par value 2 us-gaap_CommonStockParOrStatedValuePerShare us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel true 1 false false false false 0 0 false false false 2 true true false false 0.01 0.01 false false false 3 true true false false 0.01 0.01 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false us-types:perShareItemType decimal Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 false 6 Treasury stock purchased 2 us-gaap_TreasuryStockSharesAcquired us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 1998100 1998100 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:sharesItemType shares Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 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 false 7 Treasury stock acquired, average cost per share 2 us-gaap_TreasuryStockAcquiredAverageCostPerShare us-gaap true na duration No definition available. false false false false false false false false false false false true 1 false false false false 0 0 false false false 2 true true false false 45.72 45.72 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false us-types:perShareItemType decimal Total cost of shares repurchased divided by the total number of shares repurchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 1 -Section B -Paragraph 7 -Subparagraph b false 8 Common shares issued for employee incentive, benefit plans and dividend reinvestment program 2 cbe_CommonSharesIssuedForEmployeeIncentiveBenefitPlansAndDividendReinvestmentProgram cbe false na duration Common shares issued for employee incentive, benefit plans and dividend reinvestment program. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 1424792 1424792 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:sharesItemType shares Common shares issued for employee incentive, benefit plans and dividend reinvestment program. No authoritative reference available. false 9 Common stock authorized for purchase 2 cbe_CommonStockAuthorizedForPurchase cbe false na instant Common stock authorized for purchase. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 12973935 12973935 false false false 3 false false false false 0 0 false false false 4 false true false false 10000000 10000000 false false false 5 false true false false 10000000 10000000 false false false xbrli:sharesItemType shares Common stock authorized for purchase. No authoritative reference available. false 10 Number of shares expected to be repurchased to offset dilution from share issuances under equity compensation plans. 2 cbe_NumberOfSharesExpectedToBeRepurchasedToOffsetDilutionFromShareIssuancesUnderEquityCompensationPlans cbe false na duration Number of shares expected to be repurchased to offset dilution from share issuances under equity compensation plans. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 2500000 2500000 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:sharesItemType shares Number of shares expected to be repurchased to offset dilution from share issuances under equity compensation plans. No authoritative reference available. false 11 Shares repurchased under BOD authorizations 2 cbe_AdditionalSharesRepurchasedUnderAuthorizations cbe false na duration Additional Shares Repurchased Under Authorizations. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 1998100 1998100 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:sharesItemType shares Additional Shares Repurchased Under Authorizations. No authoritative reference available. false 12 Share repurchases subsequent to balance sheet date through filing date 2 cbe_ShareRepurchasesSubsequentToBalanceSheetDateThroughFilingDate cbe false na duration Share repurchases subsequent to balance sheet date through filing date. false false false false false false false false false false false verboselabel false 1 false true false false 936000 936000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:sharesItemType shares Share repurchases subsequent to balance sheet date through filing date. No authoritative reference available. false 13 Value of share repurchases subsequent to balance sheet date through filing date. 2 cbe_ValueOfShareRepurchasesSubsequentToBalanceSheetDateThroughFilingDate cbe false debit duration Value of share repurchases subsequent to balance sheet date through filing date. false false false false false false false false false false false verboselabel false 1 true true false false 42300000 42.3 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Value of share repurchases subsequent to balance sheet date through filing date. No authoritative reference available. false 5 11 false HundredThousands NoRounding NoRounding false true