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Business Combinations - Fair Value of Assets and Liabilities Assumed (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Nov. 30, 2015 | Oct. 31, 2015 | Dec. 31, 2013
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | $ 1,927.2 | $ 1,890.1 | $ 1,084.0 |  |  | $ 456.9
All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Total current assets |  |  | 12.1 |  |  |
Property and equipment |  |  | 36.9 |  |  |
Goodwill |  |  | 34.6 |  |  |
Total assets acquired |  |  | 99.8 |  |  |
Total current liabilities assumed |  |  | 7.8 |  |  |
Total long-term liabilities |  |  | 13.4 |  |  |
Total liabilities assumed |  |  | 21.2 |  |  |
Noncontrolling interests |  |  | 18.3 |  |  |
Net assets acquired |  |  | 78.6 |  |  |
Noncompete Agreements [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  | 0.4 |  |  |
Noncompete Agreements [Member] | CareSouth [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 3 years |  |  |  |
Trade Names [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  | 2.9 |  |  |
Trade Names [Member] | Reliant [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 20 years |  |  |  |
Trade Names [Member] | CareSouth [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 5 years |  |  |  |
Certificate of Need [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  | 10.8 |  |  |
Certificate of Need [Member] | Reliant [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 20 years |  |  |  |
Certificate of Need [Member] | CareSouth [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 10 years |  |  |  |
Licenses [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  | 2.1 |  |  |
Licenses [Member] | Reliant [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 20 years |  |  |  |
Licenses [Member] | CareSouth [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 10 years |  |  |  |
Home Health and Hospice Segment [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | 785.2 | $ 757.0 | 592.5 |  |  | 0.0
Home Health and Hospice Segment [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Property and equipment |  | 0.1 |  |  |  |
Goodwill | 41.4 | 20.3 |  |  |  |
Total assets acquired | 48.5 | 30.7 |  |  |  |
Total liabilities assumed | 0.4 | 0.2 |  |  |  |
Net assets acquired | 48.1 | 30.5 |  |  |  |
Home Health and Hospice Segment [Member] | CareSouth [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash and cash equivalents |  |  |  | $ 0.4 |  |
Accounts receivable |  |  |  | 10.5 |  |
Prepaid expenses and other current assets |  |  |  | 2.0 |  |
Property and equipment |  |  |  | 0.7 |  |
Goodwill |  |  |  | 143.3 |  |
Investment in noconsolidated affiliates, acquired |  |  |  | 2.2 |  |
Total assets acquired |  |  |  | 191.7 |  |
Current portion of long-term debt |  |  |  | 0.1 |  |
Accounts payable |  |  |  | 2.7 |  |
Accrued payroll |  |  |  | 2.4 |  |
Other current liabilities |  |  |  | 2.8 |  |
Long-term debt |  |  |  | 0.2 |  |
Deferred tax liabilities |  |  |  | 9.5 |  |
Total liabilities assumed |  |  |  | 17.7 |  |
Noncontrolling interests |  |  |  | 4.3 |  |
Net assets acquired |  |  |  | 169.7 |  |
Home Health and Hospice Segment [Member] | Encompass [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash and cash equivalents |  |  | 20.9 |  |  |
Accounts receivable |  |  | 37.6 |  |  |
Prepaid expenses and other current assets |  |  | 8.6 |  |  |
Property and equipment |  |  | 9.6 |  |  |
Goodwill |  |  | 592.5 |  |  |
Other long-term assets |  |  | 2.1 |  |  |
Total assets acquired |  |  | 873.5 |  |  |
Current portion of long-term debt |  |  | 2.0 |  |  |
Accounts payable |  |  | 0.9 |  |  |
Accrued payroll |  |  | 25.8 |  |  |
Other current liabilities |  |  | 18.5 |  |  |
Long-term debt |  |  | 2.0 |  |  |
Deferred tax liabilities |  |  | 64.3 |  |  |
Total liabilities assumed |  |  | 113.5 |  |  |
Noncontrolling interests |  |  | 64.5 |  |  |
Net assets acquired |  |  | 695.5 |  |  |
Home Health and Hospice Segment [Member] | Software Development [Member] | CareSouth [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  |  | 0.4 |  |
Home Health and Hospice Segment [Member] | Software Development [Member] | Encompass [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  | $ 3.2 |  |  |
Finite-lived intangible asset useful life |  |  | 3 years |  |  |
Home Health and Hospice Segment [Member] | Noncompete Agreements [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life | $ 1.1 | 1.3 |  |  |  |
Finite-lived intangible asset useful life | 5 years |  |  |  |  |
Home Health and Hospice Segment [Member] | Noncompete Agreements [Member] | CareSouth [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  |  | 0.8 |  |
Home Health and Hospice Segment [Member] | Noncompete Agreements [Member] | Encompass [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  | $ 5.6 |  |  |
Home Health and Hospice Segment [Member] | Trade Names [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life | $ 0.7 | $ 0.5 |  |  |  |
Finite-lived intangible asset useful life | 1 year | 1 year |  |  |  |
Home Health and Hospice Segment [Member] | Trade Names [Member] | CareSouth [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  |  | 2.8 |  |
Home Health and Hospice Segment [Member] | Certificate of Need [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life | $ 1.9 | $ 4.9 |  |  |  |
Finite-lived intangible asset useful life | 10 years | 10 years |  |  |  |
Home Health and Hospice Segment [Member] | Certificate of Need [Member] | CareSouth [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  |  | 15.6 |  |
Home Health and Hospice Segment [Member] | Licenses [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life | $ 3.4 | $ 3.6 |  |  |  |
Finite-lived intangible asset useful life | 10 years | 10 years |  |  |  |
Home Health and Hospice Segment [Member] | Licenses [Member] | CareSouth [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  |  | $ 13.0 |  |
Home Health and Hospice Segment [Member] | Licenses [Member] | Encompass [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  | $ 58.2 |  |  |
Finite-lived intangible asset useful life |  |  | 10 years |  |  |
Inpatient Rehabilitation Segment [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | $ 1,142.0 | $ 1,133.1 | $ 491.5 |  |  | $ 456.9
Inpatient Rehabilitation Segment [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Total current assets |  | 10.1 |  |  |  |
Property and equipment | 5.3 | 42.7 |  |  |  |
Goodwill | 9.4 | 0.7 |  |  |  |
Total assets acquired | 16.1 | 63.4 |  |  |  |
Total liabilities assumed | 16.1 | 2.7 |  |  |  |
Noncontrolling interests |  | 4.2 |  |  |  |
Net assets acquired |  | 60.7 |  |  |  |
Inpatient Rehabilitation Segment [Member] | Reliant [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | $ 42.6 |
Accounts receivable |  |  |  |  | 25.7 |
Prepaid expenses and other current assets |  |  |  |  | 2.8 |
Property and equipment |  |  |  |  | 220.6 |
Goodwill |  |  |  |  | 642.6 |
Other long-term assets |  |  |  |  | 0.9 |
Total assets acquired |  |  |  |  | 1,001.8 |
Current portion of long-term debt |  |  |  |  | 4.1 |
Accounts payable |  |  |  |  | 1.7 |
Accrued payroll |  |  |  |  | 3.7 |
Other current liabilities |  |  |  |  | 10.8 |
Long-term debt |  |  |  |  | 205.8 |
Deferred tax liabilities |  |  |  |  | 3.9 |
Total liabilities assumed |  |  |  |  | 230.0 |
Noncontrolling interests |  |  |  |  | 0.4 |
Net assets acquired |  |  |  |  | 771.4 |
Inpatient Rehabilitation Segment [Member] | Noncompete Agreements [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life | 0.4 | 0.1 |  |  |  |
Inpatient Rehabilitation Segment [Member] | Noncompete Agreements [Member] | Reliant [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  |  |  | 9.7 |
Inpatient Rehabilitation Segment [Member] | Trade Names [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life | $ 1.0 | $ 0.8 |  |  |  |
Finite-lived intangible asset useful life | 20 years | 20 years |  |  |  |
Inpatient Rehabilitation Segment [Member] | Trade Names [Member] | Reliant [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  |  |  | 8.9 |
Inpatient Rehabilitation Segment [Member] | Certificate of Need [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  | $ 8.8 |  |  |  |
Finite-lived intangible asset useful life |  | 20 years |  |  |  |
Inpatient Rehabilitation Segment [Member] | Certificate of Need [Member] | Reliant [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  |  |  | 36.6 |
Inpatient Rehabilitation Segment [Member] | Licenses [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  | $ 0.2 |  |  |  |
Finite-lived intangible asset useful life |  | 20 years |  |  |  |
Inpatient Rehabilitation Segment [Member] | Licenses [Member] | Reliant [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Finite life |  |  |  |  | $ 11.4 |
Trade Names [Member] | Home Health and Hospice Segment [Member] | Encompass [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets, Indefinite life |  |  | $ 135.2 |  |  |
Minimum [Member] | Noncompete Agreements [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life | 1 year |  |  |  |  |
Minimum [Member] | Noncompete Agreements [Member] | Reliant [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 1 year |  |  |  |
Minimum [Member] | Trade Names [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life | 1 year |  |  |  |  |
Minimum [Member] | Certificate of Need [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life | 10 years |  |  |  |  |
Minimum [Member] | Licenses [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life | 10 years |  |  |  |  |
Minimum [Member] | Home Health and Hospice Segment [Member] | Noncompete Agreements [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 2 years |  |  |  |
Minimum [Member] | Home Health and Hospice Segment [Member] | Noncompete Agreements [Member] | Encompass [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  |  | 2 years |  |  |
Minimum [Member] | Inpatient Rehabilitation Segment [Member] | Noncompete Agreements [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life | 1 year | 2 years |  |  |  |
Maximum [Member] | Noncompete Agreements [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life | 18 years |  |  |  |  |
Maximum [Member] | Noncompete Agreements [Member] | Reliant [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 2 years |  |  |  |
Maximum [Member] | Trade Names [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life | 20 years |  |  |  |  |
Maximum [Member] | Certificate of Need [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life | 30 years |  |  |  |  |
Maximum [Member] | Licenses [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life | 20 years |  |  |  |  |
Maximum [Member] | Home Health and Hospice Segment [Member] | Noncompete Agreements [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  | 5 years |  |  |  |
Maximum [Member] | Home Health and Hospice Segment [Member] | Noncompete Agreements [Member] | Encompass [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life |  |  | 5 years |  |  |
Maximum [Member] | Inpatient Rehabilitation Segment [Member] | Noncompete Agreements [Member] | All Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible asset useful life | 3 years | 3 years |  |  |  |

X
- Definition Amount of accrued payroll assumed at the acquisition date. + References No definition available. + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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