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Cash Overdrafts, Cash Equivalents, and Supplemental Cash Flow Disclosure (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Overdrafts, Cash Equivalents, and Supplemental Cash Flow Disclosure [Abstract]
Capitalized property and equipment were not paid for	$ 1.9	$ 1.9	$ 3.9
Cash overdrafts included in accounts payable		$ 11.9

X

- Definition

Capitalized Property And Equipment Not Paid

+ References

No definition available.

+ Details

Name:	che_CapitalizedPropertyAndEquipmentNotPaid
Namespace Prefix:	che_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Cash overdraft payable included in accounts payable.

+ References

No definition available.

+ Details

Name:	che_CashOverdraftPayableIncludedInAccountsPayable
Namespace Prefix:	che_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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