Disclosure of Incentive Compensation Plan (Details 3)	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Performance stock units long term incentive plan 2007-2009 [Member]
Performance based units earned under Long-Term Incentive Plans
Performance stock units outstanding at January 1		559,951
Performance stock units settled		(559,951)
Performance stock units outstanding at Sep 30		0
Performance stock units long term incentive plan 2008-2010 [Member]
Performance based units earned under Long-Term Incentive Plans
Performance stock units outstanding at January 1	480,858	290,860
Accrued dividend equivalents		4,721
Performance stock units settled	(480,858)
Performance stock units outstanding at Sep 30	0	295,581
Performance stock units long term incentive plan 2010-2012 [Member]
Performance based units earned under Long-Term Incentive Plans
Performance stock units outstanding at January 1	60,082
Accrued dividend equivalents	1,215
Performance-based units cancelled	(325)
Performance stock units outstanding at Sep 30	60,972

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Performance Stock Units Cancelled.

Name:	ctb_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceStockUnitsCancelled
Namespace Prefix:	ctb
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Share based compensation arrangement by share based payment award equity instruments other than options performance stock units number.

+ Details

Name:	ctb_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceStockUnitsNumber
Namespace Prefix:	ctb
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Share based compensation arrangement by share based payment award equity instruments other than options performance stock units settled.

+ Details

Name:	ctb_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceStockUnitsSettled
Namespace Prefix:	ctb
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Other than shares newly issued, the number of additional shares issued (for example, a stock split) or canceled (for example, to correct a share issuance), during the period under the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 65

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherShareIncreaseDecrease
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration