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Condensed Consolidating Financial Information - Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Feb. 21, 2018	Jan. 17, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Consolidated Statements of Cash Flows [Abstract]
Net cash provided by operating activities			$ 762.4	$ 658.3	$ 640.2
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired			(143.9)	(38.8)	(48.1)
Purchases of property and equipment			(254.5)	(225.8)	(177.7)
Additions to capitalized software costs			(16.0)	(19.2)	(25.2)
Proceeds from disposal of assets			0.4	12.3	23.9
Proceeds from sale of restricted investments			11.6	4.2	0.1
Purchase of restricted investments			(13.3)	(8.5)	(1.3)
Funding of intercompany note receivable					0.0
Proceeds from repayment of intercompany note receivable			0.0	0.0	0.0
Other			(8.8)	(7.2)	(1.7)
Net cash provided by investing activities of discontinued operations			0.0	0.0	0.1
Net cash used in investing activities			(424.5)	(283.0)	(229.9)
Cash flows from financing activities:
Principal payments on debt, including pre-payments			(20.6)	(129.9)	(202.1)
Principal borrowings on intercompany note payable					0.0
Principal borrowings on notes			13.2	0.0	0.0
Principal payments on intercompany notes payable			0.0	0.0	0.0
Borrowings on revolving credit facility			325.0	273.3	335.0
Payments on revolving credit facility			(390.0)	(330.3)	(313.0)
Principal payments under capital lease obligations			(17.9)	(15.3)	(13.3)
Repurchases of common stock, including fees and expenses			0.0	(38.1)	(65.6)
Dividends paid on common stock			(100.8)	(91.5)	(83.8)
Purchase of equity interests in consolidated affiliates	$ (65.0)		(65.1)	0.0	0.0
Proceeds from exercising stock warrants		$ 26.7	0.0	26.6	0.0
Distributions paid to noncontrolling interests of consolidated affiliates			(75.4)	(51.9)	(64.9)
Taxes paid on behalf of employees for shares withheld			(8.3)	(19.8)	(11.6)
Contributions from consolidated affiliates			12.6	20.8	3.5
Other			6.1	(3.8)	(0.6)
Change in intercompany advances			0.0	0.0	0.0
Net cash used in financing activities			(321.2)	(359.9)	(416.4)
Increase in cash, cash equivalents, and restricted cash			16.7	15.4	(6.1)
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period		101.4	116.8	101.4	107.5
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period			133.5	116.8	101.4
Reconciliation of Cash, Cash Equivalents, and Restricted Cash
Cash and cash equivalents at beginning of period		40.5	54.4	40.5	61.6
Restricted cash at beginning of period		60.9	62.4	60.9	45.9
Cash and cash equivalents at end of period			69.2	54.4	40.5
Restricted cash at end of period			59.0	62.4	60.9
Restricted cash included in other long-term assets at end of period			5.3	0.0	0.0
Supplemental schedule of noncash financing activities:
Conversion of convertible debt			0.0	319.4	0.0
Preferred stock conversion				0.0
Intercompany note activity					0.0
Eliminating Entries
Consolidated Statements of Cash Flows [Abstract]
Net cash provided by operating activities			0.0	0.0	0.0
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired			0.0	0.0	0.0
Purchases of property and equipment			0.0	0.0	0.0
Additions to capitalized software costs			0.0	0.0	0.0
Proceeds from disposal of assets			0.0	0.0	0.0
Proceeds from sale of restricted investments			0.0	0.0	0.0
Purchase of restricted investments			0.0	0.0	0.0
Funding of intercompany note receivable					22.5
Proceeds from repayment of intercompany note receivable			(87.0)	(51.0)	(52.0)
Other			0.0	0.0	0.0
Net cash provided by investing activities of discontinued operations					0.0
Net cash used in investing activities			(87.0)	(51.0)	(29.5)
Cash flows from financing activities:
Principal payments on debt, including pre-payments			0.0	0.0	0.0
Principal borrowings on intercompany note payable					(22.5)
Principal borrowings on notes			0.0
Principal payments on intercompany notes payable			87.0	51.0	52.0
Borrowings on revolving credit facility			0.0	0.0	0.0
Payments on revolving credit facility			0.0	0.0	0.0
Principal payments under capital lease obligations			0.0	0.0	0.0
Repurchases of common stock, including fees and expenses				0.0	0.0
Dividends paid on common stock			0.0	0.0	0.0
Purchase of equity interests in consolidated affiliates			0.0
Proceeds from exercising stock warrants				0.0
Distributions paid to noncontrolling interests of consolidated affiliates			0.0	0.0	0.0
Taxes paid on behalf of employees for shares withheld			0.0	0.0	0.0
Contributions from consolidated affiliates			0.0	0.0	0.0
Other			0.0	0.0	0.0
Change in intercompany advances			0.0	0.0	0.0
Net cash used in financing activities			87.0	51.0	29.5
Increase in cash, cash equivalents, and restricted cash			0.0	0.0	0.0
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period		0.0	0.0	0.0	0.0
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period			0.0	0.0	0.0
Reconciliation of Cash, Cash Equivalents, and Restricted Cash
Cash and cash equivalents at beginning of period		0.0	0.0	0.0	0.0
Restricted cash at beginning of period		0.0	0.0	0.0	0.0
Cash and cash equivalents at end of period			0.0	0.0	0.0
Restricted cash at end of period			0.0	0.0	0.0
Restricted cash included in other long-term assets at end of period			0.0
Supplemental schedule of noncash financing activities:
Conversion of convertible debt				0.0
Intercompany note activity			0.0	0.0	0.0
Encompass Health Corporation [Member]
Consolidated Statements of Cash Flows [Abstract]
Net cash provided by operating activities			(10.6)	28.7	60.3
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired			(131.4)	(10.9)	0.0
Purchases of property and equipment			(34.1)	(39.4)	(21.8)
Additions to capitalized software costs			(14.1)	(16.3)	(22.8)
Proceeds from disposal of assets			0.0	0.0	0.0
Proceeds from sale of restricted investments			0.0	0.0	0.0
Purchase of restricted investments			0.0	0.0	0.0
Funding of intercompany note receivable					(22.5)
Proceeds from repayment of intercompany note receivable			87.0	51.0	52.0
Other			(8.5)	(3.7)	(3.7)
Net cash provided by investing activities of discontinued operations					0.1
Net cash used in investing activities			(101.1)	(19.3)	(18.7)
Cash flows from financing activities:
Principal payments on debt, including pre-payments			(17.6)	(126.9)	(198.5)
Principal borrowings on intercompany note payable					0.0
Principal borrowings on notes			0.0
Principal payments on intercompany notes payable			0.0	0.0	0.0
Borrowings on revolving credit facility			325.0	273.3	335.0
Payments on revolving credit facility			(390.0)	(330.3)	(313.0)
Principal payments under capital lease obligations			0.0	0.0	(0.1)
Repurchases of common stock, including fees and expenses				(38.1)	(65.6)
Dividends paid on common stock			(100.7)	(91.5)	(83.8)
Purchase of equity interests in consolidated affiliates			(65.1)
Proceeds from exercising stock warrants				26.6
Distributions paid to noncontrolling interests of consolidated affiliates			0.0	0.0	0.0
Taxes paid on behalf of employees for shares withheld			(7.4)	(19.5)	(11.6)
Contributions from consolidated affiliates			0.0	0.0	0.0
Other			3.0	(3.1)	1.1
Change in intercompany advances			371.7	313.8	274.3
Net cash used in financing activities			118.9	4.3	(62.2)
Increase in cash, cash equivalents, and restricted cash			7.2	13.7	(20.6)
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period		20.6	34.3	20.6	41.2
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period			41.5	34.3	20.6
Reconciliation of Cash, Cash Equivalents, and Restricted Cash
Cash and cash equivalents at beginning of period		20.6	34.3	20.6	41.2
Restricted cash at beginning of period		0.0	0.0	0.0	0.0
Cash and cash equivalents at end of period			41.5	34.3	20.6
Restricted cash at end of period			0.0	0.0	0.0
Restricted cash included in other long-term assets at end of period			0.0
Supplemental schedule of noncash financing activities:
Conversion of convertible debt				319.4
Intercompany note activity			(136.8)	(8.8)	(11.7)
Guarantor Subsidiaries
Consolidated Statements of Cash Flows [Abstract]
Net cash provided by operating activities			417.8	381.3	327.4
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired			0.0	0.0	0.0
Purchases of property and equipment			(133.0)	(106.1)	(77.4)
Additions to capitalized software costs			(0.1)	(0.2)	(0.2)
Proceeds from disposal of assets			0.0	11.7	0.7
Proceeds from sale of restricted investments			0.0	0.0	0.0
Purchase of restricted investments			0.0	0.0	0.0
Funding of intercompany note receivable					0.0
Proceeds from repayment of intercompany note receivable			0.0	0.0	0.0
Other			2.8	0.0	(0.2)
Net cash provided by investing activities of discontinued operations					0.0
Net cash used in investing activities			(130.3)	(94.6)	(77.1)
Cash flows from financing activities:
Principal payments on debt, including pre-payments			0.0	0.0	(1.3)
Principal borrowings on intercompany note payable					0.0
Principal borrowings on notes			0.0
Principal payments on intercompany notes payable			0.0	0.0	0.0
Borrowings on revolving credit facility			0.0	0.0	0.0
Payments on revolving credit facility			0.0	0.0	0.0
Principal payments under capital lease obligations			(7.6)	(6.8)	(5.9)
Repurchases of common stock, including fees and expenses				0.0	0.0
Dividends paid on common stock			0.0	0.0	0.0
Purchase of equity interests in consolidated affiliates			0.0
Proceeds from exercising stock warrants				0.0
Distributions paid to noncontrolling interests of consolidated affiliates			0.0	0.0	0.0
Taxes paid on behalf of employees for shares withheld			0.0	0.0	0.0
Contributions from consolidated affiliates			0.0	0.0	0.0
Other			0.0	0.0	0.0
Change in intercompany advances			(279.9)	(278.6)	(242.7)
Net cash used in financing activities			(287.5)	(285.4)	(249.9)
Increase in cash, cash equivalents, and restricted cash			0.0	1.3	0.4
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period		1.6	2.9	1.6	1.2
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period			2.9	2.9	1.6
Reconciliation of Cash, Cash Equivalents, and Restricted Cash
Cash and cash equivalents at beginning of period		1.6	2.9	1.6	1.2
Restricted cash at beginning of period		0.0	0.0	0.0	0.0
Cash and cash equivalents at end of period			2.9	2.9	1.6
Restricted cash at end of period			0.0	0.0	0.0
Restricted cash included in other long-term assets at end of period			0.0
Supplemental schedule of noncash financing activities:
Conversion of convertible debt				0.0
Intercompany note activity			0.0	0.0	0.0
Non-Guarantor Subsidiaries
Consolidated Statements of Cash Flows [Abstract]
Net cash provided by operating activities			355.2	248.3	252.5
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired			(12.5)	(27.9)	(48.1)
Purchases of property and equipment			(87.4)	(80.3)	(78.5)
Additions to capitalized software costs			(1.8)	(2.7)	(2.2)
Proceeds from disposal of assets			0.4	0.6	23.2
Proceeds from sale of restricted investments			11.6	4.2	0.1
Purchase of restricted investments			(13.3)	(8.5)	(1.3)
Funding of intercompany note receivable					0.0
Proceeds from repayment of intercompany note receivable			0.0	0.0	0.0
Other			(3.1)	(3.5)	2.2
Net cash provided by investing activities of discontinued operations					0.0
Net cash used in investing activities			(106.1)	(118.1)	(104.6)
Cash flows from financing activities:
Principal payments on debt, including pre-payments			(3.0)	(3.0)	(2.3)
Principal borrowings on intercompany note payable					22.5
Principal borrowings on notes			13.2
Principal payments on intercompany notes payable			(87.0)	(51.0)	(52.0)
Borrowings on revolving credit facility			0.0	0.0	0.0
Payments on revolving credit facility			0.0	0.0	0.0
Principal payments under capital lease obligations			(10.3)	(8.5)	(7.3)
Repurchases of common stock, including fees and expenses				0.0	0.0
Dividends paid on common stock			(0.1)	0.0	0.0
Purchase of equity interests in consolidated affiliates			0.0
Proceeds from exercising stock warrants				0.0
Distributions paid to noncontrolling interests of consolidated affiliates			(75.4)	(51.9)	(64.9)
Taxes paid on behalf of employees for shares withheld			(0.9)	(0.3)	0.0
Contributions from consolidated affiliates			12.6	20.8	3.5
Other			3.1	(0.7)	(1.7)
Change in intercompany advances			(91.8)	(35.2)	(31.6)
Net cash used in financing activities			(239.6)	(129.8)	(133.8)
Increase in cash, cash equivalents, and restricted cash			9.5	0.4	14.1
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period		79.2	79.6	79.2	65.1
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period			89.1	79.6	79.2
Reconciliation of Cash, Cash Equivalents, and Restricted Cash
Cash and cash equivalents at beginning of period		18.3	17.2	18.3	19.2
Restricted cash at beginning of period		$ 60.9	62.4	60.9	45.9
Cash and cash equivalents at end of period			24.8	17.2	18.3
Restricted cash at end of period			59.0	62.4	60.9
Restricted cash included in other long-term assets at end of period			5.3
Supplemental schedule of noncash financing activities:
Conversion of convertible debt				0.0
Intercompany note activity			$ 136.8	$ 8.8	$ 11.7

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