2.2.0.7 false Stock Based Compensation (Details) (USD $) 0612 - Disclosure - Stock Based Compensation (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 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 2 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ 3 Stock Based Compensation (Textuals) 1 cbe_StockBasedCompensationTextualsAbstract cbe false na duration Stock Based Compensation 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 xbrli:stringItemType string Stock Based Compensation Textuals Abstract. false 4 Common shares authorized for share based payment plans 2 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 41000000 41000000 false false false 2 false false false false 0 0 false false false xbrli:sharesItemType shares The maximum number of shares originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the share-based compensation plan. As stock options and equity instruments other than options are awarded to participants, the shares remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph a false 5 Shares available for future grants 2 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 4322747 4322747 false false false 2 false false false false 0 0 false false false xbrli:sharesItemType shares The difference between the maximum number of shares authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares already issued upon exercise of options or other share-based awards under the plan, and 2) shares reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. No authoritative reference available. false 6 Performance-based shares and restricted stock units available for future grants 2 cbe_PerformanceBasedSharesAndRestrictedStockUnitsAvailableForFutureGrants cbe false na instant Performance-based shares and restricted stock units available for future grants. false false false false false false false false false false false verboselabel false 1 false true false false 2510289 2510289 false false false 2 false false false false 0 0 false false false xbrli:sharesItemType shares Performance-based shares and restricted stock units available for future grants. No authoritative reference available. false 7 Total share based compensation expense 2 us-gaap_AllocatedShareBasedCompensationExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 16700000 16.7 false false false 2 true true false false 14000000 14.0 false false false xbrli:monetaryItemType monetary Represents the expense recognized during the period arising from share-based compensation arrangements (for example, shares of stock, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) false 9 Stock option awards granted 2 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1598480 1598480 false false false 2 false false false false 0 0 false false false xbrli:sharesItemType shares The quantity of shares issuable on stock options awarded under the plan during the reporting period. 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