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Employee Benefit Plans - Textual (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) yr	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Defined Contribution Plan Disclosure [Line Items]
Company healthcare plan costs, net of employee payments	$ 119.0	$ 109.3	$ 85.2
Payments under the Senior Management Bonus Program	$ 11.2	9.4	9.0
HealthSouth 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 | yr	3
Employer contributions	$ 16.6	15.0	13.9
Forfeitures used to fund the matching contributions	$ 0.6	$ 0.9	$ 0.5

X

- 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:	hls_HealthcarePlanExpense
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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:	hls_RetirementInvestmentPlanAgeRequirement
Namespace Prefix:	hls_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- 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:	hls_RetirementInvestmentPlanCompanyMatch
Namespace Prefix:	hls_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Company matching contributions funded by plan forfeiture account (offsets total contribution costs).

+ References

No definition available.

+ Details

Name:	hls_RetirementInvestmentPlanCompanyMatchFundedByPlanForfeitureAccount
Namespace Prefix:	hls_
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:	hls_RetirementInvestmentPlanCompanyMatchTotalCosts
Namespace Prefix:	hls_
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:	hls_RetirementInvestmentPlanCompanyMatchVestingPercentage
Namespace Prefix:	hls_
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:	hls_RetirementInvestmentPlanCompanyMatchVestingPeriod
Namespace Prefix:	hls_
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:	hls_SeniorManagementBonusProgramTotalCosts
Namespace Prefix:	hls_
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

X

- Details

Name:	us-gaap_DefinedContributionPlanNameAxis=hls_HealthSouthRetirementInvestmentPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: