CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 2.3	$ 18.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	112.6	100.6
Deferred income taxes	0.6	5.1
Provision for doubtful accounts	12.2	7.3
Gain on sale of operating assets, net		(3.6)
Gain on sale of assets, net	(0.7)
Amortization of debt issuance costs and discount	2.4	2.4
Non-cash compensation	5.7	4.9
Other non-cash items		0.1
Changes in operating assets and liabilities:
Receivables and other operating assets	(11.6)	(18.1)
Payables and accruals	3.8	2.2
Net cash provided by operating activities	127.3	119.0
Cash flows from investing activities:
Capital expenditures	(115.2)	(127.7)
Proceeds from sale of Chicago fiber assets		18.6
Other investing activities	(0.7)	(0.6)
Net cash used in investing activities	(115.9)	(109.7)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	91.0	47.0
Payments on long-term debt and finance lease obligations	(82.8)	(55.1)
Purchase of shares	(1.0)	(1.4)
Net cash provided by (used in) financing activities	7.2	(9.5)
Increase (decrease) in cash and cash equivalents	18.6	(0.2)
Cash and cash equivalents, beginning of period	21.0	13.2
Cash and cash equivalents, end of period	39.6	13.0
Supplemental disclosures of cash flow information:
Cash paid during the periods for interest	62.6	71.2
Cash (received) paid during the periods for income taxes, net	(3.9)	0.2
Insurance proceeds received for business interruption		3.2
Non-cash operating activities
Operating lease additions	4.8	5.1
Non-cash financing activities:
Finance lease additions	6.6	9.3
Capital expenditure accounts payable and accruals	$ 9.8	$ 8.4