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Employee Benefit Plans - Textual (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) yr | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Defined Contribution Plan Disclosure [Line Items] |  |  |
Company healthcare plan costs, net of employee payments | $ 120.8 | $ 119.0 | $ 109.3
Payments under the Senior Management Bonus Program | $ 15.1 | 11.2 | 9.4
Encompass Health Retirement Investment Plan [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Contribution as percentage of salary allowed under the Plan (percent) | 100.00% |  |
Employer match criteria | 50% of the first 6% of each participant’s elective deferrals |  |
Age requirement to participate in the Plan | yr | 21 |  |
Vesting percentage in employer contributions (percent) | 100.00% |  |
Vesting period | 3 |  |
Employer contributions | $ 18.2 | 16.6 | 15.0
Forfeitures used to fund the matching contributions | $ 1.4 | $ 0.6 | $ 0.9

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- Definition Total costs for the period associated with the Company's sponsored self-insured healthcare plans that include coverage for medical and dental benefits. + References No definition available. + Details
Name: | ehc_HealthcarePlanExpense
Namespace Prefix: | ehc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The minimum age required for an employee to be eligible to participate in the Company's Retirement Investment Plan. + References No definition available. + Details
Name: | ehc_RetirementInvestmentPlanAgeRequirement
Namespace Prefix: | ehc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The maximum percentage of each 401(k) participant's elective deferral that the Company will match with a contribution to the participant's retirement account. + References No definition available. + Details
Name: | ehc_RetirementInvestmentPlanCompanyMatch
Namespace Prefix: | ehc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Company matching contributions funded by plan forfeiture account (offsets total contribution costs). + References No definition available. + Details
Name: | ehc_RetirementInvestmentPlanCompanyMatchFundedByPlanForfeitureAccount
Namespace Prefix: | ehc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total costs of the Company's matching contributions during a reporting period related to its qualified 401(k) plan. + References No definition available. + Details
Name: | ehc_RetirementInvestmentPlanCompanyMatchTotalCosts
Namespace Prefix: | ehc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total percentage of the Company's matching contributions that will vest in the Retirement Investment Plan after an employee service requirement has been met. + References No definition available. + Details
Name: | ehc_RetirementInvestmentPlanCompanyMatchVestingPercentage
Namespace Prefix: | ehc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The period of time over which the Company's contributions to a participant's retirement account fully vests. + References No definition available. + Details
Name: | ehc_RetirementInvestmentPlanCompanyMatchVestingPeriod
Namespace Prefix: | ehc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The total amount of payments made or expected to be made during a reporting period to participants that are entitled under the Senior Management Bonus Program. + References No definition available. + Details
Name: | ehc_SeniorManagementBonusProgramTotalCosts
Namespace Prefix: | ehc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RetirementPlanNameAxis=ehc_EncompassHealthRetirementInvestmentPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |