Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$ 59.0us-gaap_ProfitLoss	$ 61.5us-gaap_ProfitLoss
Loss from discontinued operations	0.3	0.1
Adjustments to reconcile net income to net cash provided by operating activities-
Provision for doubtful accounts	11.6us-gaap_ProvisionForDoubtfulAccounts	7.5us-gaap_ProvisionForDoubtfulAccounts
Depreciation and amortization	31.9	26.4
Equity in net income of nonconsolidated affiliates	(1.6)	(4.3)
Distributions from nonconsolidated affiliates	1.9	3.4
Stock-based compensation	9.4us-gaap_ShareBasedCompensation	7.3us-gaap_ShareBasedCompensation
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Change in assets and liabilities-
Accounts receivable	(37.3)	(24.7)
Other assets	(2.9)	(4.7)
Accounts payable	2.1	2.6
Accrued payroll	(23.3)	(11.3)
Other liabilities	5.4	11.2
Premium received on bond issuance	8.0hls_Premiumreceivedonbondissuance	0hls_Premiumreceivedonbondissuance
Net cash used in operating activities of discontinued operations	(0.1)	(0.2)
Total adjustments	42.7	45.5
Net cash provided by operating activities	102.0	107.1
Cash flows from investing activities:
Purchases of property and equipment	(17.7)	(56.6)
Capitalized software costs	(8.9)us-gaap_PaymentsForSoftware	(7.0)us-gaap_PaymentsForSoftware
Acquisition of business, net of cash acquired	(7.3)	0
Net change in restricted cash	(15.0)	(5.5)
Other	3.2	1.3
Net cash used in investing activities	(45.7)	(67.8)
Cash flows from financing activities:
Proceeds from bond issuance	700.0	0
Principal payments on debt, including pre-payments	(252.9)us-gaap_RepaymentsOfLongTermDebt	(1.3)us-gaap_RepaymentsOfLongTermDebt
Borrowings on revolving credit facility	35.0	40.0
Payments on revolving credit facility	(350.0)	(42.0)
Debt amendment and issuance costs	(13.7)us-gaap_PaymentsOfDebtIssuanceCosts	0us-gaap_PaymentsOfDebtIssuanceCosts
Repurchase of common stock, including fees and expenses	0	(26.3)
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Dividends paid on convertible perpetual preferred stock	(1.6)	(1.6)
Distributions paid to noncontrolling interests of consolidated affiliates	(13.2)	(12.0)
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Other	0.3	2.0
Net cash provided by (used in) financing activities	85.3	(50.7)
Increase (decrease) in cash and cash equivalents	141.6	(11.4)
Cash and cash equivalents at beginning of period	66.7	64.5
Cash and cash equivalents at end of period	$ 208.3	$ 53.1

Cash received as a premium to issue senior unsecured notes.

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The cash inflow associated with the amount received from holders exercising their stock warrants.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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