CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 17.6	$ (137.4)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	100.6	92.7
Deferred income taxes	5.6	(51.9)
Provision for doubtful accounts	7.3	9.4
Gain on sale of assets	(3.6)
Amortization of debt issuance costs and discount, net	2.4	2.4
Impairment losses on intangibles and goodwill		216.3
Non-cash compensation	4.9	8.9
Other non-cash items	0.1
Changes in operating assets and liabilities:
Receivables and other operating assets	(18.1)	(17.0)
Payables and accruals	2.2	12.4
Net cash provided by operating activities	119.0	135.8
Cash flows from investing activities:
Capital expenditures	(127.7)	(133.5)
Proceeds from sale of Chicago fiber assets	18.6
Other investing activities	(0.6)	0.2
Net cash used in investing activities	(109.7)	(133.3)
Cash flows from financing activities:
Proceeds from issuance of debt	47.0	15.0
Payments on debt and finance lease obligations	(55.1)	(12.0)
Purchase of treasury stock	(1.4)	(57.7)
Other		(0.1)
Net cash used in financing activities	(9.5)	(54.8)
Decrease in cash and cash equivalents	(0.2)	(52.3)
Cash and cash equivalents, beginning of period	13.2	69.4
Cash and cash equivalents, end of period	13.0	17.1
Supplemental disclosures of cash flow information:
Cash paid during the periods for interest	71.2	58.3
Cash paid during the periods for income taxes	0.2	11.7
Insurance proceeds received for business interruption	3.2
Non-cash financing activities:
Capital expenditure accounts payable and accruals	$ 8.4	$ 15.3