Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 327.7	$ 248.9
Loss from discontinued operations, net of tax	0.4	0.2
Adjustments to reconcile net income to net cash provided by operating activities—
Depreciation and amortization	146.8	137.2
Loss on early extinguishment of debt	0.0	10.7
Equity in net income of nonconsolidated affiliates	(6.4)	(6.2)
Stock-based compensation	65.6	37.9
Deferred tax (benefit) expense	(8.0)	51.3
Other, net	11.5	16.4
Change in assets and liabilities, net of acquisitions—
Accounts receivable	12.3	(11.5)
Other assets	15.3	(7.4)
Accounts payable	0.0	6.1
Accrued payroll	(6.7)	3.1
Accrued interest payable	8.2	7.3
Other liabilities	18.0	13.6
Net cash used in operating activities of discontinued operations	(0.7)	(0.7)
Total adjustments	255.9	257.8
Net cash provided by operating activities	584.0	506.9
Cash flows from investing activities:
Purchases of property and equipment	(171.5)	(155.7)
Additions to capitalized software costs	(13.2)	(14.6)
Net cash paid for acquisition	(135.8)	(36.6)
Other, net	(5.8)	7.6
Net cash used in investing activities	(326.3)	(199.3)
Cash flows from financing activities:
Principal payments on debt, including pre-payments	(16.1)	(125.4)
Borrowings on revolving credit facility	285.0	241.3
Payments on revolving credit facility	(315.0)	(255.3)
Repurchases of common stock, including fees and expenses	0.0	(38.1)
Dividends paid on common stock	(74.4)	(67.0)
Purchase of equity interests in consolidated affiliates	(65.1)	0.0
Proceeds from exercising stock warrants	0.0	26.6
Distributions paid to noncontrolling interests of consolidated affiliates	(56.5)	(38.3)
Taxes paid on behalf of employees for shares withheld	(8.3)	(19.8)
Other, net	(3.1)	5.4
Net cash used in financing activities	(253.5)	(270.6)
Increase in cash, cash equivalents, and restricted cash	4.2	37.0
Cash, cash equivalents, and restricted cash at beginning of period	116.8	101.4
Cash, cash equivalents, and restricted cash at end of period	121.0	138.4
Reconciliation of Cash, Cash Equivalents, and Restricted Cash
Cash and cash equivalents at beginning of period	54.4	40.5
Restricted cash at beginning of period	62.4	60.9
Cash, cash equivalents, and restricted cash at beginning of period	116.8	101.4
Cash and cash equivalents at end of period	56.9	67.6
Restricted cash at end of period	62.1	70.8
Restricted cash included in other long-term assets at end of period	2.0	0.0
Cash, cash equivalents, and restricted cash at end of period	121.0	138.4
Supplemental schedule of noncash financing activity
Conversion of convertible debt	$ 0.0	$ 319.4