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Self-Insured Risks - Textual (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) claim | Dec. 31, 2020 USD ($) claim
Insurance [Abstract] |  |
Self-insured amount | $ 36.0 |
Additional insurance | 4.0 |
Threshold of annual aggregate losses associated with general and professional liability | 46.0 |
Self-insurance reserves included in Other current liabilities | $ 45.6 | $ 44.0
Number of individual claims covered by reserves | claim | 1,200 | 1,600

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- Definition Maximum Self Insured Amount, First Layer of Risk + References No definition available. + Details
Name: | ehc_MaximumSelfInsuredAmountFirstLayerOfRisk
Namespace Prefix: | ehc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Maximum Self Insured Amount, Third Layer Risk + References No definition available. + Details
Name: | ehc_MaximumSelfInsuredAmountThirdLayerRisk
Namespace Prefix: | ehc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Number of individual claims covered by the Company's self-insured risk reserves. + References No definition available. + Details
Name: | ehc_NumberOfIndividualClaimsCoveredBySelfInsuredRiskReserves
Namespace Prefix: | ehc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Self Insured Risk, Threshold, General And Professional Liability + References No definition available. + Details
Name: | ehc_SelfInsuredRiskThresholdGeneralAndProfessionalLiability
Namespace Prefix: | ehc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_InsuranceAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property that are expected to be paid within one year (or the normal operating cycle, if longer). + References No definition available. + Details
Name: | us-gaap_SelfInsuranceReserveCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant