WideOpenWest (WOW) 10-Q8 Nov 212021 Q3 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2021	Oct. 29, 2021
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-38101
Entity Registrant Name	WideOpenWest, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-0552948
Entity Address, Address Line One	7887 East Belleview Avenue
Entity Address, Address Line Two	Suite 1000
Entity Address, City or Town	Englewood
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80111
City Area Code	720
Local Phone Number	479-3500
Title of 12(b) Security	Common Stock
Trading Symbol	WOW
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		87,162,026
Entity Central Index Key	0001701051
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 59.6	$ 12.4
Accounts receivable-trade, net of allowance for doubtful accounts of $5.7 and $6.7, respectively	39.5	44.4
Accounts receivable-other, net	10.3	2.8
Prepaid expenses and other	28.3	16
Current assets held for sale	15.5	39.2
Total current assets	153.2	114.8
Right-of-use lease assets-operating	18.8	22.1
Property, plant and equipment, net	718.8	720.9
Franchise operating rights	620.2	620.1
Goodwill	225.1	225.1
Intangible assets subject to amortization, net	1.7	1.9
Other non-current assets	42.3	42.1
Non-current assets held for sale	337.1	740
Total assets	2,117.2	2,487
Current liabilities
Accounts payable-trade	49.9	32.4
Accrued interest	2.1	4
Current portion of long-term lease liability-operating	6	5.8
Accrued liabilities and other	185.8	79.7
Current portion of long-term debt and finance lease obligations	33.9	37.5
Current portion of unearned service revenue	28.5	28.6
Current liabilities held for sale	17.5	47.9
Total current liabilities	323.7	235.9
Long-term debt and finance lease obligations, net of debt issuance costs -less current portion	1,109.9	2,228.5
Long-term lease liability-operating	14.9	19
Deferred income taxes, net	306	200.6
Other non-current liabilities	23.5	13.1
Non-current liabilities held for sale	2	2.3
Total liabilities	1,780	2,699.4
Commitments and contingencies
Stockholders' equity (deficit):
Preferred stock, $0.01 par value, 100,000,000 shares authorized; 0 shares issued and outstanding
Common stock, $0.01 par value, 700,000,000 shares authorized; 95,994,859 and 95,187,161 issued as of September 30, 2021 and December 31, 2020, respectively; 87,191,153 and 86,847,797 outstanding as of September 30, 2021 and December 31, 2020, respectively	1	1
Additional paid-in capital	345	333.8
Accumulated other comprehensive income (loss)		(6.5)
Accumulated income (deficit)	79.9	(460)
Treasury stock at cost, 8,803,706 and 8,339,364 shares as of September 30, 2021 and December 31, 2020, respectively	(88.7)	(80.7)
Total stockholders' equity (deficit)	337.2	(212.4)
Total liabilities and stockholders' equity (deficit)	$ 2,117.2	$ 2,487

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable-trade, allowance for doubtful accounts	$ 5.7	$ 6.7
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding ( in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	700,000,000	700,000,000
Common stock, shares issued (in shares)	95,994,859	95,187,161
Common stock, shares outstanding ( in shares)	87,191,153	86,847,797
Common shares held in treasury, (in shares)	8,803,706	8,339,364

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 184	$ 183.1	$ 547.4	$ 543.2
Costs and expenses:
Operating (excluding depreciation and amortization)	93.4	99.7	286.9	306.6
Selling, general and administrative	44.8	40.2	132.8	125
Depreciation and amortization	42.3	38.2	126	111.5
Total costs and expenses	180.5	178.1	545.7	543.1
Income from operations	3.5	5	1.7	0.1
Other income (expense):
Interest expense	(22.4)	(32.2)	(82.6)	(98.1)
Gain (loss) on sale of assets, net	0.1	(0.3)		0.3
Other income, net	1.8	0.8	2.4	1.5
Loss from continuing operations before provision for income tax	(17)	(26.7)	(78.5)	(96.2)
Income tax (expense) benefit	(4.2)	6.4	12.1	21.8
Loss from continuing operations	(21.2)	(20.3)	(66.4)	(74.4)
Discontinued Operations (Note 1)
Income from discontinued operations, net of tax	539.1	29.3	606.3	85.7
Net income	$ 517.9	$ 9	$ 539.9	$ 11.3
Basic and diluted (loss) per common share - continuing operations
Basic (in dollars per share)	$ (0.26)	$ (0.28)	$ (0.80)	$ (0.94)
Diluted (in dollars per share)	(0.26)	(0.28)	(0.80)	(0.94)
Basic and diluted earnings per common share - discontinued operations
Basic (in dollars per share)	6.50	0.39	7.34	1.08
Diluted (in dollars per share)	6.50	0.39	7.34	1.08
Basic and diluted earnings per common share
Basic (in dollars per share)	6.24	0.11	6.54	0.14
Diluted (in dollars per share)	$ 6.24	$ 0.11	$ 6.54	$ 0.14
Weighted-average common shares outstanding
Basic (in shares)	82,973,519	81,771,279	82,615,949	81,475,814
Diluted (in shares)	82,973,519	81,771,279	82,615,949	81,475,814

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 517.9	$ 9	$ 539.9	$ 11.3
Unrealized gain on derivative instrument, net of tax		4.5	6.5	4.8
Comprehensive income	$ 517.9	$ 13.5	$ 546.4	$ 16.1

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' DEFICIT - USD ($) $ in Millions		Common Stock	Treasury Stock at Cost	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total
Balances at beginning of period at Dec. 31, 2019		$ 0.9	$ (79.7)	$ 322.8	$ (15.5)	$ (474.4)	$ (245.9)
Balances at beginning of period (in shares) at Dec. 31, 2019		84,103,108
Increase (Decrease) in Stockholders' Deficit
Changes in accumulated other comprehensive gain (loss)					(3)		(3)
Stock-based compensation				2.7			2.7
Issuance of restricted stock, net (in shares)		2,858,421
Purchase of shares			(0.7)				(0.7)
Purchase of shares (in shares)		(199,520)
Net income (loss)						0.1	0.1
Balances at end of period at Mar. 31, 2020		$ 0.9	(80.4)	325.5	(18.5)	(474.3)	(246.8)
Balances at end of period (in shares) at Mar. 31, 2020		86,762,009
Balances at beginning of period at Dec. 31, 2019		$ 0.9	(79.7)	322.8	(15.5)	(474.4)	(245.9)
Balances at beginning of period (in shares) at Dec. 31, 2019		84,103,108
Increase (Decrease) in Stockholders' Deficit
Net income (loss)							11.3
Balances at end of period at Sep. 30, 2020		$ 0.9	(80.7)	331.1	(10.7)	(463.1)	(222.5)
Balances at end of period (in shares) at Sep. 30, 2020		86,856,478
Balances at beginning of period at Mar. 31, 2020		$ 0.9	(80.4)	325.5	(18.5)	(474.3)	(246.8)
Balances at beginning of period (in shares) at Mar. 31, 2020		86,762,009
Increase (Decrease) in Stockholders' Deficit
Changes in accumulated other comprehensive gain (loss)					3.3		3.3
Stock-based compensation				3			3
Issuance of restricted stock, net (in shares)		349,673
Purchase of shares			(0.3)				(0.3)
Purchase of shares (in shares)		(46,917)
Net income (loss)						2.2	2.2
Balances at end of period at Jun. 30, 2020	[1]	$ 0.9	(80.7)	328.5	(15.2)	(472.1)	(238.6)
Balances at end of period (in shares) at Jun. 30, 2020	[1]	87,064,765
Increase (Decrease) in Stockholders' Deficit
Changes in accumulated other comprehensive gain (loss)					4.5		4.5
Stock-based compensation				2.6			2.6
Issuance of restricted stock, net (in shares)		(198,182)
Purchase of shares (in shares)		(10,105)
Net income (loss)						9	9
Balances at end of period at Sep. 30, 2020		$ 0.9	(80.7)	331.1	(10.7)	(463.1)	(222.5)
Balances at end of period (in shares) at Sep. 30, 2020		86,856,478
Balances at beginning of period at Dec. 31, 2020		$ 1	(80.7)	333.8	(6.5)	(460)	$ (212.4)
Balances at beginning of period (in shares) at Dec. 31, 2020		86,847,797					86,847,797
Increase (Decrease) in Stockholders' Deficit
Changes in accumulated other comprehensive gain (loss)					4.3		$ 4.3
Stock-based compensation				3.1			3.1
Issuance of restricted stock, net (in shares)		666,127
Purchase of shares			(6.6)				(6.6)
Purchase of shares (in shares)		(397,186)
Net income (loss)						9.6	9.6
Balances at end of period at Mar. 31, 2021		$ 1	(87.3)	336.9	(2.2)	(450.4)	(202)
Balances at end of period (in shares) at Mar. 31, 2021		87,116,738
Balances at beginning of period at Dec. 31, 2020		$ 1	(80.7)	333.8	(6.5)	(460)	$ (212.4)
Balances at beginning of period (in shares) at Dec. 31, 2020		86,847,797					86,847,797
Increase (Decrease) in Stockholders' Deficit
Net income (loss)							$ 539.9
Balances at end of period at Sep. 30, 2021		$ 1	(88.7)	345		79.9	$ 337.2
Balances at end of period (in shares) at Sep. 30, 2021		87,191,153					87,191,153
Balances at beginning of period at Mar. 31, 2021		$ 1	(87.3)	336.9	(2.2)	(450.4)	$ (202)
Balances at beginning of period (in shares) at Mar. 31, 2021		87,116,738
Increase (Decrease) in Stockholders' Deficit
Changes in accumulated other comprehensive gain (loss)					$ 2.2		2.2
Stock-based compensation				4			4
Issuance of restricted stock, net (in shares)		34,929
Purchase of shares			(0.8)				(0.8)
Purchase of shares (in shares)		(40,473)
Net income (loss)						12.4	12.4
Balances at end of period at Jun. 30, 2021		$ 1	(88.1)	340.9		(438)	(184.2)
Balances at end of period (in shares) at Jun. 30, 2021		87,111,194
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation				4.1			4.1
Issuance of restricted stock, net (in shares)		106,642
Purchase of shares			(0.6)				(0.6)
Purchase of shares (in shares)		(26,683)
Net income (loss)						517.9	517.9
Balances at end of period at Sep. 30, 2021		$ 1	$ (88.7)	$ 345		$ 79.9	$ 337.2
Balances at end of period (in shares) at Sep. 30, 2021		87,191,153					87,191,153

[1]	Included in outstanding shares as of March 31, 2020, June, 30, 2020 and September 30, 2020 are 5,292,277, 5,322,864 and 5,072,695, respectively, of non-vested shares of restricted stock awards granted to employees and directors.

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT (Parenthetical) - shares	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Restricted stock awards
Number of shares granted to employees and directors	4,181,731	4,159,455	4,423,885	4,990,971	5,072,695	5,322,864	5,292,277

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 539.9	$ 11.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	167	170.8
Deferred income taxes	103.3	4.5
Provision for doubtful accounts	8.3	14.3
Gain on sale of Ohio markets	(689.6)
Gain on sale of assets, net	(0.5)	(0.4)
Amortization of debt issuance costs and discount	3.6	3.6
Non-cash compensation	11.6	8.3
Other non-cash items	(0.2)
Changes in operating assets and liabilities:
Receivables and other operating assets	(19)	(23)
Payables and accruals	115.1	10.7
Net cash provided by operating activities	239.5	200.1
Cash flows from investing activities:
Capital expenditures	(167.4)	(166.3)
Proceeds from sale of Ohio markets, net	1,112.5
Other investing activities	1.3	(0.6)
Net cash provided by (used in) investing activities	946.4	(166.9)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	37	91
Payments on long-term debt and finance lease obligations	(1,167.8)	(111.3)
Purchase of shares	(7.9)	(1)
Net cash used in by financing activities	(1,138.7)	(21.3)
Increase in cash and cash equivalents	47.2	11.9
Cash and cash equivalents, beginning of period	12.4	21
Cash and cash equivalents, end of period	59.6	32.9
Supplemental disclosures of cash flow information:
Cash paid during the periods for interest	81.9	93.4
Cash paid (received) during the periods for income taxes, net	2.2	(3.4)
Non-cash operating activities
Operating lease additions	1	5.5
Non-cash financing activities:
Finance lease additions	5.1	13.3
Capital expenditure accounts payable and accruals	$ 24.7	$ 13.7

General Information

General Information	9 Months Ended
General Information	Sep. 30, 2021
General Information
General Information	Note 1. General Information WideOpenWest, Inc. (“WOW” or the “Company”) is a leading broadband services provider offering high-speed data (“HSD”), cable television (“Video”), and digital telephony (“Telephony”) services to residential and business customers. At September 30, 2021, the Company served customers in seventeen Midwestern and Southeastern markets in the United States, including its Midwestern broadband networks in Detroit and Lansing, Michigan; Chicago, Illinois; Evansville, Indiana and Baltimore, Maryland. The Southeastern systems are located in Augusta, Columbus, Newnan and West Point, Georgia; Charleston, South Carolina; Dothan, Auburn, Huntsville and Montgomery, Alabama; Knoxville, Tennessee; and Panama City and Pinellas County, Florida. The Company’s operations are managed and reported to its Chief Executive Officer (“CEO”), the Company’s chief operating decision maker, on a consolidated basis. The CEO assesses performance and allocates resources based on the consolidated results of operations. Under this organizational and reporting structure, the Company operates as one reportable segment. Discontinued Operations – Sale of Service Areas On June 30, 2021, WOW entered into an Asset Purchase Agreement with Atlantic Broadband (OH), LLC, (“Atlantic”), a U.S. cable operator and subsidiary of Cogeco Communications, Inc. and Atlantic Broadband Finance, LLC, a Delaware limitied liability company (the “Atlantic Purchase Agreement”), whereby Atlantic agreed to acquire the Company’s Cleveland and Columbus, Ohio markets for approximately $1.125 billion, subject to adjustments, including customary working capital adjustments, as specified in the Atlantic Purchase Agreement. The sale was completed on September 1, 2021. Refer to Note 5 – Asset Sales for additional information reguarding the sale. Additionally, on June 30, 2021, WOW entered into an Asset Purchase Agreement with Radiate HoldCo, LLC, a telecommunications holding company affiliated with RCN Telecom Services LLC, Grande Communications Networks, LLC and WaveDivision Holdings, LLC (collectively, “Astound Broadband”) (the “Astound Purchase Agreement”), whereby Radiate HoldCo, LLC agreed to acquire the Company’s Chicago, Illinois, Evansville, Indiana and Baltimore, Maryland markets for approximately $661 million, subject to adjustments, including customary working capital adjustments, as specified in the Astound Purchase Agreement. The sale was completed on November 1, 2021. Refer to Note 14 – Subsequent Events for additional information regarding the sale. The divestiture of these markets represents a strategic shift in WOW’s business as the markets represented approximately 37% of total revenue for the three and six months ended June 30, 2021 and as such were presented as discontinued operations in the Form 10-Q for the period ending June 30, 2021. The Company will continue to present these markets as discontinued operations in the condensed consolidated statements of operations and exclude from continuing operations for all periods in which such discontinued operations are presented. Results of discontinued operations include all revenues and direct expenses of these markets. General corporate overhead is not allocated to discontinued operations. The assets and liabilities associated with these markets, as specified in the asset purchase agreements, are classified as held for sale in our condensed consolidated balance sheets. In connection with the divestiture of the Ohio markets, the Company has entered into a transition services agreement under which WOW will continue to provide certain services to Atlantic. A similar agreement commenced with Astound Broadband upon close of the Astound Purchase Agreement subsequent to the periods presented. Under the transition services agreements, the buyers may elect a variety of services, including but not limited to: information technology, network, business support services, etc. The term of the transition services agreements are for 12 months following the closing date, with two optional three month extensions. None of the costs related to the employees, processes or systems that will be utilized to provide the services under the transition services agreements were allocated to discontinued operations. The assets and liabilities sold under the Atlantic Purchase Agreement were written off during the third quarter in conjunction with the closing of the transaction and as such, the following table presents the aggregate amounts of the classes of assets and liabilities to be sold under the the Astound Purchase Agreement as of September 30, 2021. The amounts presented for the period ending December 31, 2020 include the assets and liabilities to be sold under the Astound Purchase Agreement and Atlantic Purchase Agreement: September 30, December 31, 2021 2020 (in millions) Assets Current assets Accounts receivable—trade, net of allowance for doubtful accounts of $1.1 and $1.8, respectively $ 10.0 $ 25.1 Accounts receivable—other, net — 0.9 Prepaid expenses and other 5.5 13.2 Total current assets 15.5 39.2 Right-of-use lease assets—operating 2.2 2.8 Property, plant and equipment, net 150.8 379.4 Franchise operating rights 111.2 165.4 Goodwill 68.8 183.7 Intangible assets subject to amortization, net 0.1 0.2 Other non-current assets 4.0 8.5 Total assets $ 352.6 $ 779.2 Liabilities and stockholders’ deficit Current liabilities Accounts payable—trade $ 2.7 $ 11.4 Current portion of long-term lease liability—operating 0.4 0.7 Accrued liabilities and other 7.6 18.9 Current portion of unearned service revenue 6.8 16.9 Total current liabilities 17.5 47.9 Long-term lease liability—operating 1.6 2.3 Other non-current liabilities 0.4 — Total liabilities $ 19.5 $ 50.2 The following table presents information regarding certain components of income from discontinued operations: Three months ended Nine months ended September 30, September 30, 2021 (1) 2020 2021 (1) 2020 (in millions) Revenue $ 83.7 $ 105.6 $ 293.9 $ 312.0 Costs and expenses: Operating (excluding depreciation and amortization) 28.9 40.3 106.1 127.7 Selling, general and administrative 5.2 5.6 10.7 11.5 Depreciation and amortization — 20.0 41.0 59.3 34.1 65.9 157.8 198.5 Income from operations 49.6 39.7 136.1 113.5 Other income (expense): Interest income (expense) — — 0.4 — Gain on sale of assets, net 689.9 — 690.1 0.1 Other income, net — — 0.1 0.1 Income from discontinued operations before provision for income tax 739.5 39.7 826.7 113.7 Income tax expense (200.4) (10.4) (220.4) (28.0) Income from discontinued operations $ 539.1 $ 29.3 $ 606.3 $ 85.7 (1) Includes activity for the Cleveland and Columbus, Ohio markets through September 1, 2021. The following table presents revenue by service offering from discontinued operations: Three months ended Nine months ended September 30, September 30, 2021 (1) 2020 2021 (1) 2020 (in millions) Residential subscription HSD $ 41.4 $ 46.8 $ 143.5 $ 136.3 Video 27.1 40.0 98.6 119.6 Telephony 3.0 4.2 10.9 12.8 Total Residential subscription $ 71.5 $ 91.0 $ 253.0 $ 268.7 Business subscription HSD $ 5.0 $ 5.7 $ 16.7 $ 16.8 Video 0.7 0.9 2.5 2.7 Telephony 2.3 2.9 7.9 8.9 Total business subscription $ 8.0 $ 9.5 $ 27.1 $ 28.4 Total subscription services revenue 79.5 100.5 280.1 297.1 Other business services revenue 0.6 0.5 1.6 1.5 Other revenue 3.6 4.6 12.2 13.4 Total revenue $ 83.7 $ 105.6 $ 293.9 $ 312.0 (1) Includes the activity for the Cleveland and Columbus, Ohio markets through September 1, 2021. The following table presents specified items of cash flow and significant non-cash items of discontinued operations for the nine months ended: September 30, September 30, 2021 (1) 2020 (in millions) Specified items of cash flow: Capital expenditures $ 41.2 $ 44.9 Non-cash operating activities: Operating lease additions $ — $ 0.6 Non-cash investing activities: Capital expenditure accounts payable and accruals $ 2.3 $ 1.9 (1) Includes the activity for the Cleveland and Columbus, Ohio markets through September 1, 2021.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
Summary of Significant Accounting Policies	Sep. 30, 2021
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	Note 2. Summary of Significant Accounting Policies Principles of Consolidation and Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and with the instructions to Form 10-Q and Article 10 of Regulation S-X for interim financial information. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to rules and regulations of the Securities and Exchange Commission (“SEC”); however, in the opinion of management, the disclosures made are adequate to ensure the information presented is not misleading. The year-end consolidated balance sheet was derived from audited financial statements. In the opinion of management, all normally recurring adjustments considered necessary for the fair presentation of the financial statements have been included, and the financial statements present fairly the financial position and results of operations for the interim periods presented. The results of operations for any interim period are not necessarily indicative of results expected for the full year or any future period. These unaudited condensed consolidated financial statements should be read in conjunction with the 2020 Annual Report filed with the SEC on February 24, 2021. All significant intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates The preparation of financial statements in accordance with GAAP requires management to make assumptions and estimates that affect the reported amounts and disclosures of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts and disclosures of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that it believes are reasonable under the circumstances, including but not limited to the potential impacts arising from COVID-19. To the extent there are differences between those estimates and actual results, the unaudited condensed consolidated financial statements may be materially affected. Recently Issued Accounting Standards ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848), Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional guidance, expedients and exceptions for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this update apply to all entities, subject to meeting the criteria, which participate in contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. ASU 2020-04 was subsequently amended by ASU 2021-01, Reference Rate Reform (Topic 848), Scope, which refines the scope of Topic 848 and permits optional expendients and exceptions when accounting for derivative contracts and certain hedging relationships. The amendments of these updates are available to all entities as of March 12, 2020 through December 31, 2022. The Company has not yet adopted these amendments, but has determined the impact of adopting this guidance will not have a material impact on its financial position, results of operations and cash flows. Recently Adopted Accounting Pronouncements ASU 2019-12, Income Taxes—Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes (“ASU 2019-12”). ASU 2019-12 simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company adopted this guidance prospectively as of January 1, 2021. The adoption did not have a material impact on the Company’s financial position, results of operations or cash flows.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
Revenue from Contracts with Customers	Sep. 30, 2021
Revenue from Contracts with Customers
Revenue from Contracts with Customers	Note 3. Revenue from Contracts with Customers R evenue by Service Offering The following table presents revenue by service offering: Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 (in millions) Residential subscription HSD $ 85.6 $ 74.0 $ 246.6 $ 215.7 Video 50.0 60.1 156.1 179.0 Telephony 7.0 8.5 21.9 27.4 Total Residential subscription $ 142.6 $ 142.6 $ 424.6 $ 422.1 Business subscription HSD $ 17.7 $ 16.1 $ 52.0 $ 47.7 Video 2.8 2.9 8.4 8.5 Telephony 7.2 7.4 21.9 22.6 Total business subscription $ 27.7 $ 26.4 $ 82.3 $ 78.8 Total subscription services revenue 170.3 169.0 506.9 500.9 Other business services revenue(1) 5.6 5.8 16.9 17.7 Other revenue 8.1 8.3 23.6 24.6 Total revenue $ 184.0 $ 183.1 $ 547.4 $ 543.2 (1) I ncludes wholesale and colocation lease revenue of $4.8 million and $4.9 million for the three months ended September 30, 2021 and 2020, respectively, and $14.6 million for both the nine months ended September 30, 2021 and 2020. Costs of Obtaining Contracts with Customers The following table summarizes the activity of costs of obtaining contracts with customers: Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 (in millions) Balance at beginning of period (1) $ 35.4 $ 26.2 $ 31.8 $ 20.9 Deferral 4.3 3.5 12.2 11.7 Amortization (2.7) (1.7) (7.0) (4.6) Balance at end of period $ 37.0 $ 28.0 $ 37.0 $ 28.0 (1) Includes adjustment for portion attributable to disposed service areas. The following table presents the current and non-current portion of costs of obtaining contracts with customers as of the end of the corresponding periods: September 30, 2021 December 31, 2020 (in millions) Current costs of obtaining contracts with customers $ 8.2 $ 3.6 Non-current costs of obtaining contracts with customers 28.8 28.2 Total costs of obtaining contracts with customers $ 37.0 $ 31.8 The current portion and the non-current portion of costs of obtaining contracts with customers are included in prepaid expenses and other and other non-current assets, respectively, in the Company’s unaudited condensed consolidated balance sheets. Amortization of costs of obtaining contracts with customers is included in selling, general and administrative expense in the Company’s unaudited condensed consolidated statements of operations. Contract Liabilities The following table summarizes the activity of current and non-current contract liabilities: Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 (in millions) Balance at beginning of period $ 3.3 $ 2.7 $ 2.9 $ 2.8 Deferral 3.3 2.2 9.1 6.3 Revenue recognized (3.2) (2.2) (8.6) (6.4) Balance at end of period $ 3.4 $ 2.7 $ 3.4 $ 2.7 The following table presents the current and non-current portion of contract liabilities as of the end of the corresponding periods: September 30, 2021 December 31, 2020 (in millions) Current contract liabilities $ 2.9 $ 2.4 Non-current contract liabilities 0.5 0.5 Total contract liabilities $ 3.4 $ 2.9 The current and the non-current portion of contract liabilities are included in the current portion of unearned service revenue and other non-current liabilities, respectively, in the Company’s unaudited condensed consolidated balance sheets. Unsatisfied Performance Obligations Revenue from month-to-month residential subscription service contracts have historically represented a significant portion of the Company’s revenue and the Company expects that this will continue to be the case in future periods. All residential subscription service performance obligations will be satisfied within one year. A summary of expected business subscription and other business services revenue to be recognized in future periods related to performance obligations which have not been satisfied or are partially unsatisfied as of September 30, 2021 is set forth in the table below: 2021 2022 2023 Thereafter Total (in millions) Subscription services $ 12.6 $ 31.1 $ 14.7 $ 6.7 $ 65.1 Other business services 0.8 2.6 1.2 0.3 4.9 Total expected revenue $ 13.4 $ 33.7 $ 15.9 $ 7.0 $ 70.0 Provision for Doubtful Accounts The provision for doubtful accounts and the allowance for doubtful accounts are based on the aging of the individual receivables, historical trends and current and anticipated future economic conditions. The Company manages credit risk by disconnecting services to customers who are delinquent, generally after sixty days of delinquency. The individual receivables are written-off after all reasonable efforts to collect the funds have been made. Actual write-offs may differ from the amounts reserved. The following table presents the change in the allowance for doubtful accounts for trade accounts receivable: Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 (in millions) Balance at beginning of period $ 5.2 $ 6.2 $ 6.9 $ 6.4 Provision charged to expense 2.1 2.1 5.7 8.9 Accounts written off, net of recoveries (1.6) (2.0) (6.9) (9.0) Balance at end of period $ 5.7 $ 6.3 $ 5.7 $ 6.3 The Company established an allowance for doubtful accounts for non-trade accounts receivable of $0.8 million as of September 30, 2020 that is presented within accounts receivable—other in the Company’s unaudited condensed consolidated balance sheet. The Company did not have such an allowance as of September 30, 2021.

Property, Plant and Equipment,

Property, Plant and Equipment, Net	9 Months Ended
Property, Plant and Equipment, Net	Sep. 30, 2021
Property, Plant and Equipment, Net
Property, Plant and Equipment, Net	Note 4. Property, Plant and Equipment, Net Property, plant and equipment consists of the following: September 30, December 31, 2021 2020 (in millions) Distribution facilities $ 1,216.2 $ 1,148.8 Customer premise equipment 264.0 266.2 Head-end equipment 220.0 209.5 Telephony infrastructure 52.3 52.5 Computer equipment and software 119.4 102.5 Vehicles 23.1 22.7 Buildings and leasehold improvements 32.0 31.0 Office and technical equipment 18.7 18.7 Land 4.4 4.4 Construction in progress (including material inventory and other) 38.1 32.8 Total property, plant and equipment 1,988.2 1,889.1 Less accumulated depreciation (1,269.4) (1,168.2) $ 718.8 $ 720.9 Depreciation expense for the three months ended September 30, 2021 and 2020 was $42.2 million and $38.0 million, respectively. Depreciation expense for the nine months ended September 30, 2021 and 2020 was $125.7 million and $110.7 million, respectively.

Asset Sales

Asset Sales	9 Months Ended
Asset Sales	Sep. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
Asset Sales	Note 5. Asset Sales Sale of Ohio Service Areas On June 30, 2021, the Company entered into an Asset Purchase Agreement with Atlantic, whereby Atlantic agreed to acquire the Company’s Cleveland and Columbus, Ohio markets for approximately $1.125 billion. Refer to Note 1 – General Information for a discussion of the Company’s discontinued operations. The transaction closed on September 1, 2021, as a result of which the Company received net proceeds of $1.1 billion and recorded a gain of $689.6 million. The gain is reported within discontinued operations in the condensed consolidated statement of operations for the period ending September 30, 2021. As of September 30, 2021, the Company has utilized the net proceeds from the sale to repay approximately $1,087.0 million of its Term B loans and $9.3 million to buyout specific finance lease agreements. In connection with the closing of the Atlantic Purchase Agreement, the Company and Atlantic entered into a one year Transition Services Agreement (“TSA”) in which the Company will provide certain transition services to Atlantic. The services to be provided under the TSA relate primarily to information technology, network, sales and business support services.

Accrued Liabilities and Other

Accrued Liabilities and Other	9 Months Ended
Accrued Liabilities and Other	Sep. 30, 2021
Accrued Liabilities and Other
Accrued Liabilities and Other	Note 6. Accrued Liabilities and Other Accrued liabilities and other consists of the following: September 30, December 31, 2021 2020 (in millions) Property, income, sales and use taxes(1) $ 96.2 $ 5.6 Payroll and employee benefits 32.1 28.0 Programming costs 19.8 19.7 Customer cash collections (Atlantic TSA agreement) 19.7 — Other accrued liabilities 9.0 8.2 Franchise and revenue sharing fees 7.3 7.1 Utility pole costs 1.7 1.7 Interest rate swaps — 9.4 $ 185.8 $ 79.7 (1) Includes the current income tax payable associated with the sale of the Cleveland and Columbus, Ohio markets.

Long-Term Debt and Finance Leas

Long-Term Debt and Finance Leases	9 Months Ended
Long-Term Debt and Finance Leases	Sep. 30, 2021
Long-Term Debt and Finance Leases
Long Term Debt and Finance Leases	Note 7. Long-Term Debt and Finance Leases The following table summarizes the Company’s long-term debt and finance leases: December 31, September 30, 2021 2020 Available borrowing Effective Outstanding Outstanding capacity interest rate(1) balance balance (in millions) Long-term debt: Term B Loans, net(2) $ — 4.25 % $ 1,103.1 $ 2,199.9 Revolving Credit Facility(3) 270.7 3.08 % 24.0 38.0 Total long-term debt $ 270.7 1,127.1 2,237.9 Other Financing 0.5 0.8 Finance lease obligations 19.9 32.9 Total long-term debt, finance lease obligations and other 1,147.5 2,271.6 Debt issuance costs, net(4) (3.7) (5.6) Sub-total 1,143.8 2,266.0 Less current portion (33.9) (37.5) Long-term portion $ 1,109.9 $ 2,228.5 (1) Represents the effective interest rate in effect for all borrowings outstanding as of September 30, 2021 pursuant to each debt instrument including the applicable margin. (2) At September 30, 2021 and December 31, 2020 includes $4.4 million and $6.1 million of net discounts, respectively. (3) Available borrowing capacity at September 30, 2021 represents $300.0 million of total availability less borrowing of $24.0 million on the Revolving Credit Facility and outstanding letters of credit of $5.3 million. Letters of credit are used in the ordinary course of business and are released when the respective contractual obligations have been fulfilled by the Company. (4) At September 30, 2021 and December 31, 2020, debt issuance costs include $3.2 million and $4.4 million related to Term B Loans and $0.5 million and $1.2 million related to the Revolving Credit Facility, respectively. The Company’s Term B Loans will mature on August 19, 2023 and bear interest, at the Company’s option, at a rate equal to ABR plus 2.25% or LIBOR plus 3.25%. Borrowings under the revolving credit facility will mature on May 31, 2022 and bear interest, at the Company's option, at a rate equal to ABR plus 2.00% or LIBOR plus 3.00%. As of September 30, 2021, the Company was in compliance with all debt covenants.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Sep. 30, 2021
Stock-Based Compensation
Stock-Based Compensation	Note 8. Stock-Based Compensation WOW’s 2017 Omnibus Incentive Plan provides for grants of stock options, restricted stock and performance awards. The Company’s directors, officers and other employees and persons who engage in services for the Company are eligible for grants under the 2017 Omnibus Incentive Plan. The 2017 Omnibus Incentive Plan has authorized 12,074,128 shares of common stock to be available for issuance, subject to adjustment in the event of a reorganization, stock split, merger or similar change in the Company’s corporate structure of the outstanding shares of common stock. The following table presents restricted stock activity during the nine months ended September 30, 2021: Number of Unvested Restricted Stock Shares Outstanding, beginning of period 4,990,971 Granted 1,083,963 Vested (1,616,938) Forfeited (276,265) Outstanding, end of period(1) 4,181,731 (1) The total outstanding unvested shares of restricted stock awards granted to employees and directors are included in total outstanding shares as of September 30, 2021. For restricted stock awards that contain only service conditions for vesting, the Company calculates the award fair value based on the Company’s closing stock price on the accounting grant date. The Company’s restricted stock awards generally vest ratably over a four year period based on the date of grant. Nonvested Performance Shares On March 3, 2021, the Company granted 209,621 performance shares which will vest based on the Company’s achievement level relative to the following performance measures at December 31, 2023: 50% based upon the Company’s Total Shareholder Return (“TSR”) relative to the TSRs of the Company’s peer group and 50% based on the Company’s three-year cumulative EBITDA metric. EBITDA is defined as net income (loss) before net interest expense, income taxes, depreciation and amortization (including impairments), impairment losses on intangibles and goodwill, the write-off of any asset, loss on early extinguishment of debt, integration and restructuring expenses and all non-cash charges and expenses (including stock compensation expense) and certain other income and expenses. Upon achievement of the minimum threshold performance metric, the grantee may earn 50% to 200% of their respective target shares based on the performance goal. The performance shares based on relative TSR performance have a market condition and are valued using a Monte Carlo simulation model on the grant date, which resulted in a grant date fair value of $27.76 per share. The estimated fair value is amortized to expense over the requisite service period, which ends on December 31, 2023. The following assumptions were used in the Monte Carlo simulation for computing the grant date fair value of the performance shares with a market condition: risk-free interest rate of 0.26%, volatility factors in the expected market price of the Company's common shares of 59.77% and an expected life of three years. The performance shares based on three-year cumulative EBITDA have a performance condition. The probability of achieving the performance condition is assessed at each reporting period. If it is deemed probable that the performance condition will be met, compensation cost will be recognized based on the closing price per share of the Company's common stock on the date of the grant multiplied by the number of awards expected to be earned. If it is deemed that it is not probable that the performance condition will be met, the Company will discontinue the recognition of compensation cost and any compensation cost previously recorded will be reversed. The Company recorded $4.5 million and $2.6 million for the three months ended September 30, 2021 and 2020, respectively, and recorded $11.6 million and $8.3 million for the nine months ended September 30, 2021 and 2020, respectively, of non-cash stock-based compensation expense which is reflected in selling, general and administrative expense in the Company’s unaudited condensed consolidated statements of operations.

Earnings (Loss) per Common Shar

Earnings (Loss) per Common Share	9 Months Ended
Earnings (Loss) per Common Share	Sep. 30, 2021
Earnings (Loss) per Common Share
Earnings (Loss) per Common Share	Note 9. Earnings (Loss) per Common Share Basic earnings or loss per share attributable to the Company’s common stockholders is computed by dividing net earnings or loss attributable to common stockholders by the weighted average number of common shares outstanding for the period. Diluted earnings or loss per share attributable to common stockholders presents the dilutive effect, if any, on a per share basis of potential common shares (such as restricted stock units) as if they had been vested or converted during the periods presented. No such items were included in the computation of diluted loss or earnings per share for the periods presented because the Company incurred a net loss from continuing operations and the effect of inclusion would have been anti-dilutive. Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 (in millions, except share data) Loss from continuing operations $ (21.2) $ (20.3) $ (66.4) $ (74.4) Income from discontinued operations $ 539.1 $ 29.3 $ 606.3 $ 85.7 Net income $ 517.9 $ 9.0 $ 539.9 $ 11.3 Basic weighted-average shares 82,973,519 81,771,279 82,615,949 81,475,814 Effect of dilutive securities: Restricted stock awards — — — — Diluted weighted-average shares 82,973,519 81,771,279 82,615,949 81,475,814 Basic and diluted (loss) per Basic $ (0.26) $ (0.28) $ (0.80) $ (0.94) Diluted $ (0.26) $ (0.28) $ (0.80) $ (0.94) Basic and diluted earnings per Basic $ 6.50 $ 0.39 $ 7.34 $ 1.08 Diluted $ 6.50 $ 0.39 $ 7.34 $ 1.08 Basic and diluted earnings per common share Basic $ 6.24 $ 0.11 $ 6.54 $ 0.14 Diluted $ 6.24 $ 0.11 $ 6.54 $ 0.14

Fair Value Measurements

Fair Value Measurements	9 Months Ended
Fair Value Measurements	Sep. 30, 2021
Fair Value Measurements
Fair Value Measurements	Note 10. Fair Value Measurements The fair values of cash and cash equivalents, receivables and trade payables approximate their carrying values due to the short-term nature of these instruments. For assets and liabilities of a long-term nature, the Company determines fair value based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. Market or observable inputs are the preferred source of values, followed by unobservable inputs or assumptions based on hypothetical transactions in the absence of market inputs. The Company applies the following hierarchy in determining fair value: ● Level 1, defined as observable inputs being quoted prices in active markets for identical assets; ● Level 2, defined as observable inputs other than quoted prices included in Level 1, including quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and ● Level 3, defined as values determined using models that utilize significant unobservable inputs for which little or no market data exists, discounted cash flow methodologies or similar techniques, or other determinations requiring significant management judgment or estimation. The Company’s derivative instrument expired in May 2021; however, prior to expiration the derivative instrument was accounted for at fair value on a recurring basis and classified within Level 2 of the valuation hierarchy and was valued at $9.4 million at December 31, 2020. The fair value of the derivative instrument was measured as the present value of all expected future cash flows based on the LIBOR-based swap yield curves as of the measurement date. The present value calculation utilized discount rates that were adjusted to reflect the credit quality of the Company and its counterparties. The estimated fair value of the Company’s long-term debt is based on dealer quotes considering current market rates for the Company’s credit facility and is classified as Level 2. The inputs used to determine the fair value of the Company’s aggregate debt balance has trended from quoted market prices in active markets to quoted prices in non-active markets. The fair value of the Company’s long-term debt was valued at $1,111.0 million and $2,203.1 million as of September 30, 2021 and December 31, 2020, respectively. Long-term debt fair value does not include debt issuance costs and discounts. There were no transfers in or out of Level 1, 2 or 3 during the periods ended September 30, 2021 and December 31, 2020. The Company’s non-financial assets such as franchise operating rights, property, plant, and equipment, and other intangible assets are not measured at fair value on a recurring basis; however, they are subject to fair value adjustments in certain circumstances, such as when there is evidence that an impairment may exist. When such impairments are recorded, fair values are generally classified within Level 3 of the valuation hierarchy.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	9 Months Ended
Derivative Instruments and Hedging Activities	Sep. 30, 2021
Derivative Instruments and Hedging Activities
Derivative Instruments and Hedging Activities	Note 11. Derivative Instruments and Hedging Activities The Company is exposed to certain market risks during the normal course of its business arising from adverse changes in interest rates. The Company selectively uses derivative financial instruments (“derivatives”), including interest rate swaps, to manage interest rate risk. The Company does not hold or issue derivative instruments for speculative purposes. Fluctuations in interest rates can be volatile, and the Company’s risk management activities do not totally eliminate these risks. Consequently, these fluctuations could have a significant effect on the Company’s financial results. The Company’s exposure to interest rate risk results primarily from its variable rate borrowings. On May 9, 2018, the Company entered into variable to fixed interest rate swap agreements for a notional amount of $1,361.2 million to hedge a portion of the outstanding principal balance of its variable rate term loan debt. The Company’s outstanding derivatives had a notional amount of $1,323.5 million and the fair value was presented within accured liabilities and other of $9.4 million within the unaudited condensed consolidated balance sheet as of December 31, 2020. The Company did not have such amounts as of September 30, 2021 Gains (losses) on derivatives designated as cash flow hedges included in the unaudited condensed consolidated statements of comprehensive income (loss) are shown in the table below. Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 Interest rate swap contracts(1) (in millions) Gain recorded in AOCL on derivatives, before tax $ — $ 5.7 $ 8.5 $ 6.1 Tax impact — (1.2) (2.0) (1.3) Gain recorded in AOCL on derivatives, net — 4.5 6.5 4.8 (1) Gains (losses) on derivatives reclassified from AOCL into income are included in “Interest expense” in the unaudited condensed consolidated statements of operations, the same line item as the earnings effect of the hedged item. Losses recognized for the three and nine months ended September 30 , 2021 total nil and $9.5 million, respectively. For the periods presented, all cash flows associated with derivatives are classified as operating cash flows in the unaudited condensed consolidated statements of cash flows.

Income Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2021
Income Taxes
Income Taxes	Note 12. Income Taxes The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the difference is expected to reverse. Additionally, the impact on deferred tax assets and liabilities of changes in tax rates is reflected in the financial statements in the period that includes the date of enactment. The Company reported income tax expense of $204.6 million and $4.0 million for the three months ended September 30, 2021 and 2020, respectively and $208.3 million and $6.2 million for the nine months ended September 30, 2021 and 2020, respectively. As a result of the closure of the sale of the Company’s Cleveland and Columbus, Ohio markets to Atlantic on September 1, 2021, the Company recognized certain deferred tax liabilities associated with fixed assets and intangibles of the sold markets, with an offsetting realization of deferred tax assets of net operating losses and research and development credits to reduce the tax effect of the transaction. The effective income tax rate increase from the three months ended June 30, 2021 was primarily driven by the expensing of goodwill attributed to the sold markets, where there was no corresponding tax basis, and state tax expense and state deferred rate remeasurement related to the sale. The effective tax rate decrease from the three months ended September 30, 2020 was primarily related to an increase in income before tax resulting from the sale. As a result of utilizing available net operating losses and research and development credits to offset the tax effect of the sale, the Company has reclassed uncertain tax positions that had previously been offset by these deferred tax assets to the long-term income tax payable account.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2021
Commitments and Contingencies
Commitments and Contingencies	Note 13. Commitments and Contingencies IPO Shareholder Class Action Kirkland. et al. v. WideOpenWest, Inc., et al. Kirkland Kirkland Sprint Patent Infringement Claim The Company is party to various legal proceedings (including individual, class and putative class actions) arising in the normal course of its business covering a wide range of matters and types of claims including, but not limited to, general contracts, billing disputes, rights of access, programming, taxes, fees and surcharges, consumer protection, trademark and patent infringement, employment, regulatory, tort, claims of competitors and disputes with other carriers. In accordance with GAAP, the Company accrues an expense for pending litigation when it determines that an unfavorable outcome is probable and the amount of the loss can be reasonably estimated. Legal defense costs are expensed as incurred. None of the Company’s existing accruals for pending matters are material. The Company consistently monitors its pending litigation for the purpose of adjusting its accruals and revising its disclosures accordingly, in accordance with GAAP, when required. However, litigation is subject to uncertainty, and the outcome of any particular matter is not predictable. The Company will vigorously defend its interests in pending litigation, and the Company believes that the ultimate resolution of all such matters, after considering insurance coverage or other indemnities to which it is entitled, will not have a material adverse effect on its consolidated financial position, results of operations, or cash flows.

Subsequent Event

Subsequent Event	9 Months Ended
Subsequent Event	Sep. 30, 2021
Subsequent Event
Subsequent Event	Note 14. Subsequent Events On June 30, 2021, the Company entered into an Asset Purchase Agreement with Astound Broadband, whereby Astound Broadband agreed to acquire the Company’s Chicago, Illinois, Evansville, Indiana and Baltimore, Maryland markets for approximately $661 million. Refer to Note 1 – General Information for a discussion of the Company’s discontinued operations. The transaction closed on November 1, 2021, and as a result of which the Company received net proceeds of $653.5 million. The Company utilized approximately $397.0 million of net proceeds to repay its long-term debt. In connection with the closing of the Astound Purchase Agreement, the Company and Astound Broadband entered into a one year Transition Services Agreement (“Astound TSA”) in which the Company will provide certain transition services to Astound Broadband. The services to be provided under the Astound TSA relate primarily to information technology, network, sales and business support services.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2021
Summary of Significant Accounting Policies
Principles of Consolidation	Principles of Consolidation and Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and with the instructions to Form 10-Q and Article 10 of Regulation S-X for interim financial information. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to rules and regulations of the Securities and Exchange Commission (“SEC”); however, in the opinion of management, the disclosures made are adequate to ensure the information presented is not misleading. The year-end consolidated balance sheet was derived from audited financial statements. In the opinion of management, all normally recurring adjustments considered necessary for the fair presentation of the financial statements have been included, and the financial statements present fairly the financial position and results of operations for the interim periods presented. The results of operations for any interim period are not necessarily indicative of results expected for the full year or any future period. These unaudited condensed consolidated financial statements should be read in conjunction with the 2020 Annual Report filed with the SEC on February 24, 2021. All significant intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of financial statements in accordance with GAAP requires management to make assumptions and estimates that affect the reported amounts and disclosures of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts and disclosures of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that it believes are reasonable under the circumstances, including but not limited to the potential impacts arising from COVID-19. To the extent there are differences between those estimates and actual results, the unaudited condensed consolidated financial statements may be materially affected.
Recently Issued Accounting Standards and Recently Adopted Accounting Pronouncements	Recently Issued Accounting Standards ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848), Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional guidance, expedients and exceptions for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this update apply to all entities, subject to meeting the criteria, which participate in contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. ASU 2020-04 was subsequently amended by ASU 2021-01, Reference Rate Reform (Topic 848), Scope, which refines the scope of Topic 848 and permits optional expendients and exceptions when accounting for derivative contracts and certain hedging relationships. The amendments of these updates are available to all entities as of March 12, 2020 through December 31, 2022. The Company has not yet adopted these amendments, but has determined the impact of adopting this guidance will not have a material impact on its financial position, results of operations and cash flows. Recently Adopted Accounting Pronouncements ASU 2019-12, Income Taxes—Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes (“ASU 2019-12”). ASU 2019-12 simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company adopted this guidance prospectively as of January 1, 2021. The adoption did not have a material impact on the Company’s financial position, results of operations or cash flows.

General Information (Tables)

General Information (Tables)	9 Months Ended
General Information (Tables)	Sep. 30, 2021
General Information
Schedule of discontinued operations - assets and liabilities, components of income, revenue by service offering and non-cash items and capital expenditure	September 30, December 31, 2021 2020 (in millions) Assets Current assets Accounts receivable—trade, net of allowance for doubtful accounts of $1.1 and $1.8, respectively $ 10.0 $ 25.1 Accounts receivable—other, net — 0.9 Prepaid expenses and other 5.5 13.2 Total current assets 15.5 39.2 Right-of-use lease assets—operating 2.2 2.8 Property, plant and equipment, net 150.8 379.4 Franchise operating rights 111.2 165.4 Goodwill 68.8 183.7 Intangible assets subject to amortization, net 0.1 0.2 Other non-current assets 4.0 8.5 Total assets $ 352.6 $ 779.2 Liabilities and stockholders’ deficit Current liabilities Accounts payable—trade $ 2.7 $ 11.4 Current portion of long-term lease liability—operating 0.4 0.7 Accrued liabilities and other 7.6 18.9 Current portion of unearned service revenue 6.8 16.9 Total current liabilities 17.5 47.9 Long-term lease liability—operating 1.6 2.3 Other non-current liabilities 0.4 — Total liabilities $ 19.5 $ 50.2 The following table presents information regarding certain components of income from discontinued operations: Three months ended Nine months ended September 30, September 30, 2021 (1) 2020 2021 (1) 2020 (in millions) Revenue $ 83.7 $ 105.6 $ 293.9 $ 312.0 Costs and expenses: Operating (excluding depreciation and amortization) 28.9 40.3 106.1 127.7 Selling, general and administrative 5.2 5.6 10.7 11.5 Depreciation and amortization — 20.0 41.0 59.3 34.1 65.9 157.8 198.5 Income from operations 49.6 39.7 136.1 113.5 Other income (expense): Interest income (expense) — — 0.4 — Gain on sale of assets, net 689.9 — 690.1 0.1 Other income, net — — 0.1 0.1 Income from discontinued operations before provision for income tax 739.5 39.7 826.7 113.7 Income tax expense (200.4) (10.4) (220.4) (28.0) Income from discontinued operations $ 539.1 $ 29.3 $ 606.3 $ 85.7 (1) Includes activity for the Cleveland and Columbus, Ohio markets through September 1, 2021. The following table presents revenue by service offering from discontinued operations: Three months ended Nine months ended September 30, September 30, 2021 (1) 2020 2021 (1) 2020 (in millions) Residential subscription HSD $ 41.4 $ 46.8 $ 143.5 $ 136.3 Video 27.1 40.0 98.6 119.6 Telephony 3.0 4.2 10.9 12.8 Total Residential subscription $ 71.5 $ 91.0 $ 253.0 $ 268.7 Business subscription HSD $ 5.0 $ 5.7 $ 16.7 $ 16.8 Video 0.7 0.9 2.5 2.7 Telephony 2.3 2.9 7.9 8.9 Total business subscription $ 8.0 $ 9.5 $ 27.1 $ 28.4 Total subscription services revenue 79.5 100.5 280.1 297.1 Other business services revenue 0.6 0.5 1.6 1.5 Other revenue 3.6 4.6 12.2 13.4 Total revenue $ 83.7 $ 105.6 $ 293.9 $ 312.0 (1) Includes the activity for the Cleveland and Columbus, Ohio markets through September 1, 2021. The following table presents specified items of cash flow and significant non-cash items of discontinued operations for the nine months ended: September 30, September 30, 2021 (1) 2020 (in millions) Specified items of cash flow: Capital expenditures $ 41.2 $ 44.9 Non-cash operating activities: Operating lease additions $ — $ 0.6 Non-cash investing activities: Capital expenditure accounts payable and accruals $ 2.3 $ 1.9 (1) Includes the activity for the Cleveland and Columbus, Ohio markets through September 1, 2021.

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
Revenue from Contracts with Customers (Tables)	Sep. 30, 2021
Revenue from Contracts with Customers
Schedule of revenue by service offering	Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 (in millions) Residential subscription HSD $ 85.6 $ 74.0 $ 246.6 $ 215.7 Video 50.0 60.1 156.1 179.0 Telephony 7.0 8.5 21.9 27.4 Total Residential subscription $ 142.6 $ 142.6 $ 424.6 $ 422.1 Business subscription HSD $ 17.7 $ 16.1 $ 52.0 $ 47.7 Video 2.8 2.9 8.4 8.5 Telephony 7.2 7.4 21.9 22.6 Total business subscription $ 27.7 $ 26.4 $ 82.3 $ 78.8 Total subscription services revenue 170.3 169.0 506.9 500.9 Other business services revenue(1) 5.6 5.8 16.9 17.7 Other revenue 8.1 8.3 23.6 24.6 Total revenue $ 184.0 $ 183.1 $ 547.4 $ 543.2 (1) I ncludes wholesale and colocation lease revenue of $4.8 million and $4.9 million for the three months ended September 30, 2021 and 2020, respectively, and $14.6 million for both the nine months ended September 30, 2021 and 2020.
Schedule of activity and costs of current and non-current costs of obtaining contracts	Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 (in millions) Balance at beginning of period (1) $ 35.4 $ 26.2 $ 31.8 $ 20.9 Deferral 4.3 3.5 12.2 11.7 Amortization (2.7) (1.7) (7.0) (4.6) Balance at end of period $ 37.0 $ 28.0 $ 37.0 $ 28.0 (1) Includes adjustment for portion attributable to disposed service areas. September 30, 2021 December 31, 2020 (in millions) Current costs of obtaining contracts with customers $ 8.2 $ 3.6 Non-current costs of obtaining contracts with customers 28.8 28.2 Total costs of obtaining contracts with customers $ 37.0 $ 31.8
Schedule of activity of contract liabilities and current and non-current contract liabilities	Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 (in millions) Balance at beginning of period $ 3.3 $ 2.7 $ 2.9 $ 2.8 Deferral 3.3 2.2 9.1 6.3 Revenue recognized (3.2) (2.2) (8.6) (6.4) Balance at end of period $ 3.4 $ 2.7 $ 3.4 $ 2.7 September 30, 2021 December 31, 2020 (in millions) Current contract liabilities $ 2.9 $ 2.4 Non-current contract liabilities 0.5 0.5 Total contract liabilities $ 3.4 $ 2.9
Summary of expected revenue to be recognized in future periods related to performance obligations which have not been satisfied or are partially unsatisfied	2021 2022 2023 Thereafter Total (in millions) Subscription services $ 12.6 $ 31.1 $ 14.7 $ 6.7 $ 65.1 Other business services 0.8 2.6 1.2 0.3 4.9 Total expected revenue $ 13.4 $ 33.7 $ 15.9 $ 7.0 $ 70.0
Schedule of change in the allowance for doubtful accounts for trade accounts receivable	Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 (in millions) Balance at beginning of period $ 5.2 $ 6.2 $ 6.9 $ 6.4 Provision charged to expense 2.1 2.1 5.7 8.9 Accounts written off, net of recoveries (1.6) (2.0) (6.9) (9.0) Balance at end of period $ 5.7 $ 6.3 $ 5.7 $ 6.3

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	9 Months Ended
Property, Plant and Equipment, Net (Tables)	Sep. 30, 2021
Property, Plant and Equipment, Net
Schedule of property, plant and equipment	September 30, December 31, 2021 2020 (in millions) Distribution facilities $ 1,216.2 $ 1,148.8 Customer premise equipment 264.0 266.2 Head-end equipment 220.0 209.5 Telephony infrastructure 52.3 52.5 Computer equipment and software 119.4 102.5 Vehicles 23.1 22.7 Buildings and leasehold improvements 32.0 31.0 Office and technical equipment 18.7 18.7 Land 4.4 4.4 Construction in progress (including material inventory and other) 38.1 32.8 Total property, plant and equipment 1,988.2 1,889.1 Less accumulated depreciation (1,269.4) (1,168.2) $ 718.8 $ 720.9

Accrued Liabilities and Other (

Accrued Liabilities and Other (Tables)	9 Months Ended
Accrued Liabilities and Other (Tables)	Sep. 30, 2021
Accrued Liabilities and Other
Schedule of accrued liabilities and other	September 30, December 31, 2021 2020 (in millions) Property, income, sales and use taxes(1) $ 96.2 $ 5.6 Payroll and employee benefits 32.1 28.0 Programming costs 19.8 19.7 Customer cash collections (Atlantic TSA agreement) 19.7 — Other accrued liabilities 9.0 8.2 Franchise and revenue sharing fees 7.3 7.1 Utility pole costs 1.7 1.7 Interest rate swaps — 9.4 $ 185.8 $ 79.7

Long-Term Debt and Finance Le_2

Long-Term Debt and Finance Leases (Tables)	9 Months Ended
Long-Term Debt and Finance Leases (Tables)	Sep. 30, 2021
Long-Term Debt and Finance Leases
Summary of long-term debt and finance leases	December 31, September 30, 2021 2020 Available borrowing Effective Outstanding Outstanding capacity interest rate(1) balance balance (in millions) Long-term debt: Term B Loans, net(2) $ — 4.25 % $ 1,103.1 $ 2,199.9 Revolving Credit Facility(3) 270.7 3.08 % 24.0 38.0 Total long-term debt $ 270.7 1,127.1 2,237.9 Other Financing 0.5 0.8 Finance lease obligations 19.9 32.9 Total long-term debt, finance lease obligations and other 1,147.5 2,271.6 Debt issuance costs, net(4) (3.7) (5.6) Sub-total 1,143.8 2,266.0 Less current portion (33.9) (37.5) Long-term portion $ 1,109.9 $ 2,228.5 (1) Represents the effective interest rate in effect for all borrowings outstanding as of September 30, 2021 pursuant to each debt instrument including the applicable margin. (2) At September 30, 2021 and December 31, 2020 includes $4.4 million and $6.1 million of net discounts, respectively. (3) Available borrowing capacity at September 30, 2021 represents $300.0 million of total availability less borrowing of $24.0 million on the Revolving Credit Facility and outstanding letters of credit of $5.3 million. Letters of credit are used in the ordinary course of business and are released when the respective contractual obligations have been fulfilled by the Company. (4) At September 30, 2021 and December 31, 2020, debt issuance costs include $3.2 million and $4.4 million related to Term B Loans and $0.5 million and $1.2 million related to the Revolving Credit Facility, respectively.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
Stock-Based Compensation (Tables)	Sep. 30, 2021
Stock-Based Compensation
Summary of the restricted stock awards activity	Number of Unvested Restricted Stock Shares Outstanding, beginning of period 4,990,971 Granted 1,083,963 Vested (1,616,938) Forfeited (276,265) Outstanding, end of period(1) 4,181,731 (1) The total outstanding unvested shares of restricted stock awards granted to employees and directors are included in total outstanding shares as of September 30, 2021.

Earnings (Loss) per Common Sh_2

Earnings (Loss) per Common Share (Tables)	9 Months Ended
Earnings (Loss) per Common Share (Tables)	Sep. 30, 2021
Earnings (Loss) per Common Share
Schedule of computation of income per share	Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 (in millions, except share data) Loss from continuing operations $ (21.2) $ (20.3) $ (66.4) $ (74.4) Income from discontinued operations $ 539.1 $ 29.3 $ 606.3 $ 85.7 Net income $ 517.9 $ 9.0 $ 539.9 $ 11.3 Basic weighted-average shares 82,973,519 81,771,279 82,615,949 81,475,814 Effect of dilutive securities: Restricted stock awards — — — — Diluted weighted-average shares 82,973,519 81,771,279 82,615,949 81,475,814 Basic and diluted (loss) per Basic $ (0.26) $ (0.28) $ (0.80) $ (0.94) Diluted $ (0.26) $ (0.28) $ (0.80) $ (0.94) Basic and diluted earnings per Basic $ 6.50 $ 0.39 $ 7.34 $ 1.08 Diluted $ 6.50 $ 0.39 $ 7.34 $ 1.08 Basic and diluted earnings per common share Basic $ 6.24 $ 0.11 $ 6.54 $ 0.14 Diluted $ 6.24 $ 0.11 $ 6.54 $ 0.14

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
Derivative Instruments and Hedging Activities (Tables)	Sep. 30, 2021
Derivative Instruments and Hedging Activities
Schedule of gains and losses on derivatives	Three months ended Nine months ended September 30, September 30, 2021 2020 2021 2020 Interest rate swap contracts(1) (in millions) Gain recorded in AOCL on derivatives, before tax $ — $ 5.7 $ 8.5 $ 6.1 Tax impact — (1.2) (2.0) (1.3) Gain recorded in AOCL on derivatives, net — 4.5 6.5 4.8 (1) Gains (losses) on derivatives reclassified from AOCL into income are included in “Interest expense” in the unaudited condensed consolidated statements of operations, the same line item as the earnings effect of the hedged item. Losses recognized for the three and nine months ended September 30 , 2021 total nil and $9.5 million, respectively.

General Information - Markets a

General Information - Markets and segments (Details)	9 Months Ended
General Information - Markets and segments (Details)	Sep. 30, 2021itemsegment
General Information
Number of markets \| item	17
Number of reportable segments \| segment	1

General Information - Discontin

General Information - Discontinued Operations, General (Details) $ in Millions	Jun. 30, 2021USD ($)item	Sep. 30, 2021USD ($)	Jun. 30, 2021USD ($)	Jun. 30, 2021USD ($)	Sep. 01, 2021USD ($)
Transition Services Agreement
Discontinued Operations
Agreement term	12 months
Number of optional term extensions \| item	2
Period of optional term extension	3 months
Amount of employee service, processes or systems expense allocated to discontinued operations		$ 0
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale
Discontinued Operations
Revenue percentage contributed by disposal group			37.00%	37.00%
Astound broadband markets \| Discontinued Operations, Held-for-sale
Discontinued Operations
Consideration	$ 661		$ 661	$ 661
Atlantic broadband markets \| Discontinued Operations, Disposed of by sale
Discontinued Operations
Consideration					$ 1,125

General Information - Discont_2

General Information - Discontinued Operations, Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Assets
Total current assets	$ 15.5	$ 39.2
Current liabilities
Total current liabilities	17.5	47.9
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale
Assets
Accounts receivable-trade, net of allowance for doubtful accounts of $1.1 and $1.8, respectively		25.1
Accounts receivable-other, net		0.9
Prepaid expenses and other		13.2
Total current assets		39.2
Right-of-use lease assets-operating		2.8
Property, plant and equipment, net		379.4
Franchise operating rights		165.4
Goodwill		183.7
Intangible assets subject to amortization, net		0.2
Other non-current assets		8.5
Total assets		779.2
Current liabilities
Accounts payable-trade		11.4
Current portion of long-term lease liability-operating		0.7
Accrued liabilities and other		18.9
Current portion of unearned service revenue		16.9
Total current liabilities		47.9
Long-term lease liability-operating		2.3
Total liabilities		50.2
Accounts receivable-trade, - Allowance for doubtful accounts		$ 1.8
Astound broadband markets \| Discontinued Operations, Held-for-sale
Assets
Accounts receivable-trade, net of allowance for doubtful accounts of $1.1 and $1.8, respectively	10
Prepaid expenses and other	5.5
Total current assets	15.5
Right-of-use lease assets-operating	2.2
Property, plant and equipment, net	150.8
Franchise operating rights	111.2
Goodwill	68.8
Intangible assets subject to amortization, net	0.1
Other non-current assets	4
Total assets	352.6
Current liabilities
Accounts payable-trade	2.7
Current portion of long-term lease liability-operating	0.4
Accrued liabilities and other	7.6
Current portion of unearned service revenue	6.8
Total current liabilities	17.5
Long-term lease liability-operating	1.6
Other non-current liabilities	0.4
Total liabilities	19.5
Accounts receivable-trade, - Allowance for doubtful accounts	$ 1.1

General Information - Discont_3

General Information - Discontinued Operations, Components of Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other income (expense):
Income from discontinued operations, net of tax	$ 539.1	$ 29.3	$ 606.3	$ 85.7
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale
Discontinued operations - Components of income
Revenue	83.7		293.9
Costs and expenses
Operating (excluding depreciation and amortization)	28.9		106.1
Selling, general and administrative	5.2		10.7
Depreciation and amortization			41
Total costs and expenses	34.1		157.8
Income from operations	49.6		136.1
Other income (expense):
Interest income (expense)			0.4
Gain on sale of assets, net	689.9		690.1
Other income, net			0.1
Income from discontinued operations before provision for income tax	739.5		826.7
Income tax benefit (expense)	(200.4)		(220.4)
Income from discontinued operations, net of tax	$ 539.1		$ 606.3
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale
Discontinued operations - Components of income
Revenue		105.6		312
Costs and expenses
Operating (excluding depreciation and amortization)		40.3		127.7
Selling, general and administrative		5.6		11.5
Depreciation and amortization		20		59.3
Total costs and expenses		65.9		198.5
Income from operations		39.7		113.5
Other income (expense):
Gain on sale of assets, net				0.1
Other income, net				0.1
Income from discontinued operations before provision for income tax		39.7		113.7
Income tax benefit (expense)		(10.4)		(28)
Income from discontinued operations, net of tax		$ 29.3		$ 85.7

General Information - Discont_4

General Information - Discontinued Operations, Revenue by Service Offering (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Discontinued Operations
Total revenue	$ 184	$ 183.1	$ 547.4	$ 543.2
Subscription services
Discontinued Operations
Revenue	170.3	169	506.9	500.9
Other business services
Discontinued Operations
Revenue	5.6	5.8	16.9	17.7
Other business services - Wholesale and colocation lease revenue
Discontinued Operations
Revenue	4.8	4.9	14.6	14.6
Other revenue
Discontinued Operations
Other revenue	8.1	8.3	23.6	24.6
Residential Subscription \| Subscription services
Discontinued Operations
Revenue	142.6	142.6	424.6	422.1
Residential Subscription \| HSD
Discontinued Operations
Revenue	85.6	74	246.6	215.7
Residential Subscription \| Video
Discontinued Operations
Revenue	50	60.1	156.1	179
Residential Subscription \| Telephony
Discontinued Operations
Revenue	7	8.5	21.9	27.4
Business Subscription \| Subscription services
Discontinued Operations
Revenue	27.7	26.4	82.3	78.8
Business Subscription \| HSD
Discontinued Operations
Revenue	17.7	16.1	52	47.7
Business Subscription \| Video
Discontinued Operations
Revenue	2.8	2.9	8.4	8.5
Business Subscription \| Telephony
Discontinued Operations
Revenue	7.2	7.4	21.9	22.6
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale
Discontinued Operations
Other revenue	3.6		12.2
Total revenue	83.7		293.9
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale \| Subscription services
Discontinued Operations
Revenue	79.5		280.1
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale \| Other business services
Discontinued Operations
Revenue	0.6		1.6
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale \| Residential Subscription
Discontinued Operations
Revenue	71.5		253
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale \| Residential Subscription \| HSD
Discontinued Operations
Revenue	41.4		143.5
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale \| Residential Subscription \| Video
Discontinued Operations
Revenue	27.1		98.6
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale \| Residential Subscription \| Telephony
Discontinued Operations
Revenue	3		10.9
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale \| Business Subscription \| Subscription services
Discontinued Operations
Revenue	8		27.1
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale \| Business Subscription \| HSD
Discontinued Operations
Revenue	5		16.7
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale \| Business Subscription \| Video
Discontinued Operations
Revenue	0.7		2.5
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale or Disposed of by Sale \| Business Subscription \| Telephony
Discontinued Operations
Revenue	$ 2.3		$ 7.9
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale
Discontinued Operations
Other revenue		4.6		13.4
Total revenue		105.6		312
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale \| Subscription services
Discontinued Operations
Revenue		100.5		297.1
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale \| Other business services
Discontinued Operations
Revenue		0.5		1.5
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale \| Residential Subscription
Discontinued Operations
Revenue		91		268.7
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale \| Residential Subscription \| HSD
Discontinued Operations
Revenue		46.8		136.3
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale \| Residential Subscription \| Video
Discontinued Operations
Revenue		40		119.6
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale \| Residential Subscription \| Telephony
Discontinued Operations
Revenue		4.2		12.8
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale \| Business Subscription \| Subscription services
Discontinued Operations
Revenue		9.5		28.4
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale \| Business Subscription \| HSD
Discontinued Operations
Revenue		5.7		16.8
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale \| Business Subscription \| Video
Discontinued Operations
Revenue		0.9		2.7
Atlantic and Astound broadband markets \| Discontinued Operations, Held-for-sale \| Business Subscription \| Telephony
Discontinued Operations
Revenue		$ 2.9		$ 8.9

General Information - Discont_5

General Information - Discontinued Operations, Cash Flow and Significant Non-Cash Items (Details) - Atlantic and Astound broadband markets - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Discontinued Operations, Held-for-sale or Disposed of by Sale
Specified items of cash flow
Capital expenditures	$ 41.2
Non-cash financing activities:
Capital expenditure accounts payable and accruals	$ 2.3
Discontinued Operations, Held-for-sale
Specified items of cash flow
Capital expenditures		$ 44.9
Non-cash operating activities
Operating lease additions		0.6
Non-cash financing activities:
Capital expenditure accounts payable and accruals		$ 1.9

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Revenue by Service Offering (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from Contracts with Customers
Total revenue	$ 184	$ 183.1	$ 547.4	$ 543.2
Subscription services
Revenue from Contracts with Customers
Revenue	170.3	169	506.9	500.9
Other revenue
Revenue from Contracts with Customers
Other revenue	8.1	8.3	23.6	24.6
Other business services
Revenue from Contracts with Customers
Revenue	5.6	5.8	16.9	17.7
Other business services - Wholesale and colocation lease revenue
Revenue from Contracts with Customers
Revenue	4.8	4.9	14.6	14.6
Residential Subscription \| Subscription services
Revenue from Contracts with Customers
Revenue	142.6	142.6	424.6	422.1
Residential Subscription \| HSD
Revenue from Contracts with Customers
Revenue	85.6	74	246.6	215.7
Residential Subscription \| Video
Revenue from Contracts with Customers
Revenue	50	60.1	156.1	179
Residential Subscription \| Telephony
Revenue from Contracts with Customers
Revenue	7	8.5	21.9	27.4
Business Subscription \| Subscription services
Revenue from Contracts with Customers
Revenue	27.7	26.4	82.3	78.8
Business Subscription \| HSD
Revenue from Contracts with Customers
Revenue	17.7	16.1	52	47.7
Business Subscription \| Video
Revenue from Contracts with Customers
Revenue	2.8	2.9	8.4	8.5
Business Subscription \| Telephony
Revenue from Contracts with Customers
Revenue	$ 7.2	$ 7.4	$ 21.9	$ 22.6

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Costs of Obtaining Contracts (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenue from Contracts with Customers
Capitalized contract cost, Beginning of period	$ 35.4	$ 26.2	$ 31.8	$ 20.9
Deferral	4.3	3.5	12.2	11.7
Amortization	(2.7)	(1.7)	(7)	(4.6)
Capitalized contract cost, End of period	37	28	37	28
Current costs of obtaining contracts with customers	8.2		8.2		$ 3.6
Non-current costs of obtaining contracts with customers	28.8		28.8		28.2
Total costs of obtaining contracts with customers	$ 37	$ 28	$ 37	$ 28	$ 31.8

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Contract Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenue from Contracts with Customers
Contract liability, Beginning of period	$ 3.3	$ 2.7	$ 2.9	$ 2.8
Deferral	3.3	2.2	9.1	6.3
Revenue recognized	(3.2)	(2.2)	(8.6)	(6.4)
Contract liability, End of period	3.4	2.7	3.4	2.7
Current contract liabilities	2.9		2.9		$ 2.4
Non-current contract liabilities	0.5		0.5		0.5
Total contract liabilities	$ 3.4	$ 2.7	$ 3.4	$ 2.7	$ 2.9

Revenue from Contracts with C_6

Revenue from Contracts with Customers - Unsatisfied Performance Obligations Amount (Details) $ in Millions	Sep. 30, 2021USD ($)
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 70
Subscription services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	65.1
Other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	4.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 13.4
Expected period to recognize revenue of remaining performance obligations	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01 \| Subscription services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 12.6
Expected period to recognize revenue of remaining performance obligations	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01 \| Other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 0.8
Expected period to recognize revenue of remaining performance obligations	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 33.7
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 \| Subscription services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 31.1
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 \| Other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 2.6
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 15.9
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 \| Subscription services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 14.7
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 \| Other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 1.2
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 7
Expected period to recognize revenue of remaining performance obligations
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 \| Subscription services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 6.7
Expected period to recognize revenue of remaining performance obligations
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 \| Other business services
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 0.3
Expected period to recognize revenue of remaining performance obligations

Revenue from Contracts with C_7

Revenue from Contracts with Customers - Provision for Doubtful Accounts (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Change in the allowance for doubtful accounts
Balance at beginning of period			$ 6.7
Provision charged to expense			8.3	$ 14.3
Balance at end of period	$ 5.7		5.7
Trade accounts receivable
Change in the allowance for doubtful accounts
Balance at beginning of period	5.2	$ 6.2	6.9	6.4
Provision charged to expense	2.1	2.1	5.7	8.9
Accounts written off, net of recoveries	(1.6)	(2)	(6.9)	(9)
Balance at end of period	5.7	6.3	5.7	6.3
Non-trade accounts receivable
Change in the allowance for doubtful accounts
Balance at end of period	$ 0	$ 0.8	$ 0	$ 0.8

Property, Plant and Equipment_3

Property, Plant and Equipment, Net - Components (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Property, Plant and Equipment, Net
Total property, plant and equipment	$ 1,988.2		$ 1,988.2		$ 1,889.1
Less accumulated depreciation	(1,269.4)		(1,269.4)		(1,168.2)
Plant, Property and Equipment, Net	718.8		718.8		720.9
Depreciation expense	42.2	$ 38	125.7	$ 110.7
Distribution facilities
Property, Plant and Equipment, Net
Total property, plant and equipment	1,216.2		1,216.2		1,148.8
Customer premise equipment
Property, Plant and Equipment, Net
Total property, plant and equipment	264		264		266.2
Head-end equipment
Property, Plant and Equipment, Net
Total property, plant and equipment	220		220		209.5
Telephony infrastructure
Property, Plant and Equipment, Net
Total property, plant and equipment	52.3		52.3		52.5
Computer equipment and software
Property, Plant and Equipment, Net
Total property, plant and equipment	119.4		119.4		102.5
Vehicles
Property, Plant and Equipment, Net
Total property, plant and equipment	23.1		23.1		22.7
Buildings and leasehold improvements
Property, Plant and Equipment, Net
Total property, plant and equipment	32		32		31
Office and technical equipment
Property, Plant and Equipment, Net
Total property, plant and equipment	18.7		18.7		18.7
Land
Property, Plant and Equipment, Net
Total property, plant and equipment	4.4		4.4		4.4
Construction in progress (including material inventory and other)
Property, Plant and Equipment, Net
Total property, plant and equipment	$ 38.1		$ 38.1		$ 32.8

Asset Sales (Details)

Asset Sales (Details) - USD ($) $ in Millions	Sep. 01, 2021	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of Ohio markets, net					$ 1,112.5
Gain on sale of Ohio markets					$ (689.6)
Transition Services Agreement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Agreement term		12 months
Astound broadband markets \| Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration		$ 661
Atlantic broadband markets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Lease buyout			$ 9.3
Atlantic broadband markets \| Term B Loans
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Repayment of debt				$ 1,087
Atlantic broadband markets \| Discontinued Operations, Disposed of by sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration	$ 1,125
Proceeds from sale of Ohio markets, net	1,100
Gain on sale of Ohio markets	$ 689.6
Atlantic \| Transition Services Agreement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Agreement term		1 year

Accrued Liabilities and Other_2

Accrued Liabilities and Other (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Accrued Liabilities and Other
Property, income, sales and use taxes	$ 96.2	$ 5.6
Payroll and employee benefits	32.1	28
Programming costs	19.8	19.7
Customer cash collections (Atlantic TSA agreement)	19.7
Other accrued liabilities	9	8.2
Franchise and revenue sharing fees	7.3	7.1
Utility pole costs	1.7	1.7
Interest rate swaps		9.4
Accrued liabilities and other	$ 185.8	$ 79.7

Long-Term Debt and Finance Le_3

Long-Term Debt and Finance Leases - Summary (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Long-Term Debt and Capital Leases
Available borrowing capacity	$ 270.7
Long-term debt	1,127.1	$ 2,237.9
Other Financing	0.5	0.8
Finance lease obligations	19.9	32.9
Total long-term debt, finance lease obligations and other	1,147.5	2,271.6
Debt issuance costs, net	(3.7)	(5.6)
Sub-total	1,143.8	2,266
Less current portion	(33.9)	(37.5)
Long-term portion	$ 1,109.9	2,228.5
Term B Loans
Long-Term Debt and Capital Leases
Effective interest rate (as a percent)	4.25%
Long-term debt	$ 1,103.1	2,199.9
Debt issuance costs, net	(3.2)	(4.4)
Net discount	4.4	6.1
Revolving Credit Facility
Long-Term Debt and Capital Leases
Available borrowing capacity	$ 270.7
Effective interest rate (as a percent)	3.08%
Long-term debt	$ 24	38
Debt issuance costs, net	(0.5)	$ (1.2)
Maximum borrowing capacity	300
Outstanding letters of credit	$ 5.3

Long-Term Debt and Finance Le_4

Long-Term Debt and Finance Leases - Term B Loans and Revolving Credit Facility (Details)	9 Months Ended
	Sep. 30, 2021
Term B Loans \| Alternate base rate
Long-Term Debt and Capital Leases
Basis spread on variable rate (as a percent)	2.25%
Term B Loans \| Adjusted LIBOR rate
Long-Term Debt and Capital Leases
Basis spread on variable rate (as a percent)	3.25%
Revolving Credit Facility \| Alternate base rate
Long-Term Debt and Capital Leases
Basis spread on variable rate (as a percent)	2.00%
Revolving Credit Facility \| Adjusted LIBOR rate
Long-Term Debt and Capital Leases
Basis spread on variable rate (as a percent)	3.00%

Stock-Based Compensation - 2017

Stock-Based Compensation - 2017 Plan (Details)	9 Months Ended
Stock-Based Compensation - 2017 Plan (Details)	Sep. 30, 2021shares
Restricted stock awards
Stock Based Compensation
Vesting period	4 years
2017 Plan
Stock Based Compensation
Number of authorized shares	12,074,128

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Activity (Details) - Restricted stock awards	9 Months Ended
	Sep. 30, 2021shares
Restricted Stock Awards
Outstanding, beginning of period (in shares)	4,990,971
Granted (in shares)	1,083,963
Vested (in shares)	(1,616,938)
Forfeited (in shares)	(276,265)
Outstanding, end of period (in shares)	4,181,731
Additional information
Vesting period	4 years

Stock-Based Compensation - Perf

Stock-Based Compensation - Performance Shares (Details) - Performance shares	Mar. 03, 2021$ / sharesshares
Stock Based Compensation
Granted (in shares) \| shares	209,621
Share-based Payment Arrangement, Tranche One, Total Shareholder Return
Stock Based Compensation
Vesting (as a percent)	50.00%
Grant date fair value (in dollars per share) \| $ / shares	$ 27.76
Fair value assumptions
Risk-free interest rate (as a percent)	0.26%
Expected volatility (as a percent)	59.77%
Expected life	3 years
Share-based Payment Arrangement, Tranche Two, EBITDA metric
Stock Based Compensation
Vesting (as a percent)	50.00%
Vesting period	3 years
Minimum
Stock Based Compensation
Percentage of target shares that may be earned upon achievement of threshold performance metric	50.00%
Maximum
Stock Based Compensation
Percentage of target shares that may be earned upon achievement of threshold performance metric	200.00%

Stock-Based Compensation - Expe

Stock-Based Compensation - Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Selling, general and administrative expense and operating expenses (excluding depreciation and amortization)
Stock-Based Compensation
Non-cash compensation expense	$ 4.5	$ 2.6	$ 11.6	$ 8.3

Earnings (Loss) per Common Sh_3

Earnings (Loss) per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings (Loss) per Common Share
Loss from continuing operations, basic	$ (21.2)	$ (20.3)	$ (66.4)	$ (74.4)
Loss from continuing operations, diluted	(21.2)	(20.3)	(66.4)	(74.4)
Income from discontinued operations, basic	539.1	29.3	606.3	85.7
Income from discontinued operations, diluted	539.1	29.3	606.3	85.7
Net income, basic	517.9	9	539.9	11.3
Net income, diluted	$ 517.9	$ 9	$ 539.9	$ 11.3
Basic weighted-average shares	82,973,519	81,771,279	82,615,949	81,475,814
Diluted weighted-average shares	82,973,519	81,771,279	82,615,949	81,475,814
Basic and diluted (loss) per common share - continuing operations
Basic (in dollars per share)	$ (0.26)	$ (0.28)	$ (0.80)	$ (0.94)
Diluted (in dollars per share)	(0.26)	(0.28)	(0.80)	(0.94)
Basic and diluted earnings per common share - discontinued operations
Basic (in dollars per share)	6.50	0.39	7.34	1.08
Diluted (in dollars per share)	6.50	0.39	7.34	1.08
Basic and diluted earnings per common share
Basic (in dollars per share)	6.24	0.11	6.54	0.14
Diluted (in dollars per share)	$ 6.24	$ 0.11	$ 6.54	$ 0.14

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Transfer of assets from level 1 to level 2	$ 0	$ 0
Transfer of assets from level 2 to level 1	0	0
Transfer of liabilities from level 1 to level 2	0	0
Transfer of liabilities from level 2 to level 1	0	0
Transfer of assets into level 3	0	0
Transfer of assets out of level 3	0	0
Transfer of liabilities into level 3	0	0
Transfer of liabilities out of level 3	0	0
Significant other observable inputs (Level 2) \| Recurring
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Derivative Liability		9.4
Long-term debt	$ 1,111	$ 2,203.1

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Notional amounts and fair value (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020	May 09, 2018
Derivatives
Derivative current liabilities, fair value		$ 9.4
Interest rate swaps \| Cash flow hedging
Derivatives
Notional amount	$ 0	1,323.5	$ 1,361.2
Interest rate swaps \| Cash flow hedging \| Accrued Liabilities and Other
Derivatives
Derivative current liabilities, fair value	$ 0	$ 9.4

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Gains and losses on derivatives (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Gains and losses on derivatives
Gain (loss) recorded in AOCL on derivatives, net		$ 4.5	$ 6.5	$ 4.8
Cash flow hedging \| Interest rate swaps
Gains and losses on derivatives
Gain (loss) recorded in AOCL on derivatives, before tax		5.7	8.5	6.1
Tax impact		(1.2)	(2)	(1.3)
Gain (loss) recorded in AOCL on derivatives, net		$ 4.5	6.5	$ 4.8
Cash flow hedging \| Interest rate swaps \| Interest expense
Gains and losses on derivatives
Gain (loss) on derivatives	$ 0		$ (9.5)

Income Taxes - Income tax expen

Income Taxes - Income tax expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Taxes
Income tax expense, Continuing and discontinued operations	$ 204.6	$ 4	$ 208.3	$ 6.2

Commitments and Contingencies -

Commitments and Contingencies - Legal (Details)	Sep. 30, 2021item
New York
Commitments and contingencies
Number of actions filed that have been consolidated	3
IPO Shareholder Class Action
Commitments and contingencies
Number of plaintiff firms	4
Number of lawsuits	5
IPO Shareholder Class Action \| Colorado
Commitments and contingencies
Number of lawsuits	2

Subsequent Event (Details)

Subsequent Event (Details) - USD ($) $ in Millions	Nov. 01, 2021	Sep. 30, 2021	Jun. 30, 2021
Subsequent Event
Net proceeds from sale of markets		$ 1,112.5
Astound broadband markets \| Discontinued Operations, Held-for-sale
Subsequent Event
Consideration			$ 661
Subsequent Events
Subsequent Event
Repayment of debt	$ 397
Subsequent Events \| Astound broadband markets \| Discontinued Operations, Disposed of by sale
Subsequent Event
Net proceeds from sale of markets	$ 653.5