XML 73 R62.htm IDEA: XBRL DOCUMENT v3.8.0.1

Equity and Redeemable Noncontrolling Interest Equity and Redeemable Noncontrolling Interest - Nonredeemable Noncontrolling Interest, Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Equity [Abstract]
Nonredeemable Noncontrolling Interest Activity	$ 0.3	$ 0.1	$ 0.8	$ 0.4

X

- Definition

Noncontrolling Interest Increase (Decrease), During The Period

+ References

No definition available.

+ Details

Name:	crl_NoncontrollingInterestIncreaseDecreaseDuringThePeriod
Namespace Prefix:	crl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration