CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ 36.4	$ (87.3)	$ 185.3
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	206.2	186.9	198.1
Deferred income taxes	4.3	(57.3)	(175.9)
Provision for doubtful accounts	16.9	20.2	19.7
Gain on sale of Lawrence, Kansas system			(38.4)
Loss (gain) on sale of assets, net	5.4	(0.9)	(94.1)
Amortization of debt issuance costs and discount	4.7	4.7	5.0
Loss on early extinguishment of debt			7.1
Impairment losses on intangibles and goodwill	9.7	216.3	147.4
Non-cash compensation	10.1	13.0	13.4
Other non-cash items	0.6		0.2
Changes in operating assets and liabilities:
Receivables and other operating assets	(25.2)	(36.7)	(27.0)
Payables and accruals	(2.8)	10.4	(45.3)
Net cash provided by operating activities	266.3	269.3	195.5
Cash flows from investing activities:
Capital expenditures	(247.5)	(314.1)	(301.3)
Proceeds from sale of Chicago fiber assets	24.7	22.6	221.6
Proceeds from sale of Lawrence, Kansas system			213.0
Other investing activities	(1.3)	3.8	1.2
Net cash provided by (used in) investing activities	(224.1)	(287.7)	134.5
Cash flows from financing activities:
Proceeds from issuance of long-term debt	80.0	110.0	2,454.3
Payments on long-term debt and finance lease obligations	(112.8)	(74.3)	(3,082.2)
Proceeds from issuance of common stock, net of issuance costs			334.1
Contribution from Parent			20.3
Payment of debt issuance costs			(3.7)
Repurchase of management units			(8.8)
Purchase of shares	(1.6)	(73.3)	(4.8)
Other		(0.2)	(0.6)
Net cash used in financing activities	(34.4)	(37.8)	(291.4)
Increase (decrease) in cash and cash equivalents	7.8	(56.2)	38.6
Cash and cash equivalents, beginning of period	13.2	69.4	30.8
Cash and cash equivalents, end of period	21.0	13.2	69.4
Supplemental disclosures of cash flow information:
Cash paid during the periods for interest	139.0	126.8	190.3
Cash paid during the periods for income taxes, net	1.6	11.9	6.5
Insurance proceeds received for business interruption	9.6	1.5
Non-cash financing activities:
Capital expenditure accounts payable and accruals	$ 16.8	$ 18.2	$ 11.0