Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 76.7	$ 59.0
Loss from discontinued operations, net of tax	(0.1)	(0.3)
Adjustments to reconcile net income to net cash provided by operating activities-
Provision for doubtful accounts	16.5	11.6
Depreciation and amortization	42.4	31.9
Equity in net income of nonconsolidated affiliates	(2.4)	(1.6)
Distributions from nonconsolidated affiliates	1.7	1.9
Stock-based compensation	4.5	9.4
Deferred tax expense	34.7	26.8
Other	5.9	10.8
Change in assets and liabilities-
Accounts receivable	(45.7)	(37.3)
Other assets	1.8	(2.9)
Accounts payable	0.6	2.1
Accrued payroll	20.9	(23.3)
Other liabilities	4.1	5.4
Premium received on bond issuance	0.0	8.0
Premium paid on redemption of bonds	(1.9)	0.0
Net cash used in operating activities of discontinued operations	(0.2)	(0.1)
Total adjustments	82.9	42.7
Net cash provided by operating activities	159.7	102.0
Cash flows from investing activities:
Purchases of property and equipment	(31.4)	(17.7)
Capitalized software costs	(7.7)	(8.9)
Acquisition of business, net of cash acquired	0.0	(7.3)
Net change in restricted cash	(3.2)	(15.0)
Other	2.8	3.2
Net cash used in investing activities	(39.5)	(45.7)
Cash flows from financing activities:
Proceeds from bond issuance	0.0	700.0
Principal payments on debt, including pre-payments	(56.3)	(252.9)
Borrowings on revolving credit facility	60.0	35.0
Payments on revolving credit facility	(60.0)	(350.0)
Debt amendment and issuance costs	0.0	(13.7)
Repurchase of common stock, including fees and expenses	(12.9)	0.0
Dividends paid on common stock	(21.3)	(18.6)
Dividends paid on convertible perpetual preferred stock	0.0	(1.6)
Distributions paid to noncontrolling interests of consolidated affiliates	(15.6)	(13.2)
Other	(2.5)	0.3
Net cash (used in) provided by financing activities	(108.6)	85.3
Increase in cash and cash equivalents	11.6	141.6
Cash and cash equivalents at beginning of period	61.6	66.7
Cash and cash equivalents at end of period	$ 73.2	$ 208.3