XML 85 R69.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Subsequent Events (Details) (USD $) | 3 Months Ended | 12 Months Ended | 0 Months Ended |
--- | --- | --- | --- | ---
Mar. 28, 2015 | Dec. 27, 2014 | Apr. 22, 2015 | Dec. 28, 2013
Subsequent Event [Line Items] |  |  |  |
Maximum borrowing capacity, Term Loan and Line of Credit |  |  |  | $ 970,000,000 crl_MaximumBorrowingCapacityTermLoanAndLineOfCredit
Term loan facility |  |  |  | 420,000,000 us-gaap_SecuredLongTermDebt
Multi-currency revolving credit facility |  |  |  | 550,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Interest rate in addition to federal funds rate | 1.42%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 | 1.42%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 |  |
Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Maximum borrowing capacity, Term Loan and Line of Credit |  |  | 1,300,000,000.0 crl_MaximumBorrowingCapacityTermLoanAndLineOfCredit / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Term loan facility |  |  | 400,000,000.0 us-gaap_SecuredLongTermDebt / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Multi-currency revolving credit facility |  |  | 900,000,000.0 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Number of quarterly installment payments |  |  | 20 crl_NumberofQuarterlyInstallmentPayments / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Federal Funds Effective Swap Rate [Member] | Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Interest rate in addition to federal funds rate |  |  | 0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_VariableRateAxis = us-gaap_FederalFundsEffectiveSwapRateMember |

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- Definition Maximum borrowing capacity, Term Loan and Line of Credit + References No definition available. + Details
Name: | crl_MaximumBorrowingCapacityTermLoanAndLineOfCredit
Namespace Prefix: | crl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Number of Quarterly Installment Payments + References No definition available. + Details
Name: | crl_NumberofQuarterlyInstallmentPayments
Namespace Prefix: | crl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
Name: | us-gaap_SecuredLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_VariableRateAxis=us-gaap_FederalFundsEffectiveSwapRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |