Cincinnati Bell (BDWGP) 10-K 25 Feb 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2020	Jan. 31, 2021	Jun. 30, 2020
Class of Stock [Line Items]
Entity Registrant Name	CINCINNATI BELL INC.
Entity Central Index Key	0000716133
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Small Business	false
Document Type	10-K
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		50,908,586
Entity Public Float			$ 0.8
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity File Number	1-8519
Entity Tax Identification Number	31-1056105
Entity Address, Address Line One	221 East Fourth Street
Entity Address, City or Town	Cincinnati
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45202
City Area Code	513
Local Phone Number	397-9900
Entity Incorporation, State or Country Code	OH
Document Annual Report	true
Document Transition Report	false
ICFR Auditor Attestation Flag	true
Common Stock [Member]
Class of Stock [Line Items]
Trading Symbol	CBB
Security Exchange Name	NYSE
Title of 12(b) Security	Common Shares ($0.01 par value)
Cumulative Convertible Preferred Shares [Member]
Class of Stock [Line Items]
Trading Symbol	CBB.PB
Security Exchange Name	NYSE
Title of 12(b) Security	Cumulative Convertible Preferred Stock

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 12.2	$ 11.6
Receivables, less allowances of $23.0 and $14.3	369.6	307.7
Inventory, materials and supplies	35.5	44.6
Prepaid expenses	33.5	28.3
Other current assets	8.3	11.6
Total current assets	459.1	403.8
Property, plant and equipment, net	1,729.1	1,780.8
Operating lease right-of-use assets	37.4	35.8
Goodwill	161.5	160.5
Intangible assets, net	148.1	155.4
Deferred income tax assets	82.5	59.3
Other noncurrent assets	50.9	58.2
Total assets	2,668.6	2,653.8
Current liabilities
Current portion of long-term debt	21.8	22.3
Accounts payable	299.2	284.6
Unearned revenue and customer deposits	68.9	59.1
Accrued taxes	28.1	29.1
Accrued interest	26.7	26.8
Accrued payroll and benefits	50.5	49
Other current liabilities	50.9	52.6
Total current liabilities	546.1	523.5
Long-term debt, less current portion	1,949.9	1,901.3
Operating lease liabilities	33.6	32.1
Pension and postretirement benefit obligations	200.2	215.5
Pole license agreement obligation	36.7	38
Deferred income tax liabilities	10.9	11.7
Other noncurrent liabilities	82.3	71.7
Total liabilities	2,859.7	2,793.8
Shareowners’ deficit
Preferred stock, 2,357,299 shares authorized; 155,250 shares (3,105,000 depositary shares) of 6 3/4% Cumulative Convertible Preferred Stock issued and outstanding at December 31, 2020 and 2019; liquidation preference $1,000 per share ($50 per depositary share)	129.4	129.4
Common shares, $.01 par value; 96,000,000 shares authorized; 50,680,605 and 50,420,700 shares issued and outstanding at December 31, 2020 and 2019, respectively	0.5	0.5
Additional paid-in capital	2,670.3	2,676.2
Accumulated deficit	(2,831.6)	(2,776)
Accumulated other comprehensive loss	(159.7)	(170.1)
Total shareowners’ deficit	(191.1)	(140)
Total liabilities and shareowners’ deficit	$ 2,668.6	$ 2,653.8

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Allowance for receivables	$ 23,000,000	$ 14,300,000
Preferred Stock, Shares Authorized	2,357,299	2,357,299
Preferred Stock, 6 3/4% Cumulative Convertible, Shares Issued	155,250	155,250
Preferred Stock, 6 3/4% Cumulative Convertible, Shares Outstanding	155,250	155,250
Preferred Stock, Depositary Shares	3,105,000	3,105,000
Preferred Stock, Dividend Rate, Percentage	6.75%	6.75%
Preferred Stock, Liquidation Preference Per Share	$ 1,000	$ 1,000
Preferred Stock Liquidation Depositary Per Share	$ 50	$ 50
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	96,000,000	96,000,000
Common Stock, Shares, Issued	50,680,605	50,420,700
Common Stock, Shares, Outstanding	50,680,605	50,420,700

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenue	$ 1,559.8	$ 1,536.7	$ 1,378.2
Costs and expenses
Cost of services and products, excluding items below	802	784.6	698.7
Selling, general and administrative	346.5	354.4	313.4
Depreciation and amortization	293.4	304.9	252
Restructuring and severance related charges	16.9	6.9	8.3
Transaction and integration costs	35	12.8	22.5
Total operating costs and expenses	1,493.8	1,463.6	1,294.9
Operating income	66	73.1	83.3
Interest expense	134.2	139.6	131.5
Loss on extinguishment of debt, net	0	0	1.3
Other components of pension and postretirement benefit plans expense	14.1	11.2	12.5
Other income, net	(1.2)	(0.5)	(1.6)
Loss before income taxes	(81.1)	(77.2)	(60.4)
Income tax (benefit) expense	(25.5)	(10.6)	9.4
Net loss	(55.6)	(66.6)	(69.8)
Preferred stock dividends	10.4	10.4	10.4
Net loss applicable to common shareowners	$ (66)	$ (77)	$ (80.2)
Basic and diluted net loss per common share	$ (1.30)	$ (1.53)	$ (1.73)
Weighted-average common shares outstanding (millions)
Basic	50.6	50.4	46.3
Diluted	50.6	50.4	46.3

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (55.6)	$ (66.6)	$ (69.8)
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss)	2.2	3.7	(6.5)
Cash flow hedges:
Unrealized loss on cash flow hedges arising during the period, net of tax of ($3.4), ($3.7), ($1.4)	(11.4)	(12.5)	(4.8)
Reclassification adjustment for net losses included in net income, net of tax of $2.0, $0.5, $0.3	6.4	1.7	0.9
Defined benefit plans:
Net (loss) gain arising from remeasurement during the period, net of tax of ($0.8), $0.7, ($1.6)	(2.7)	2.5	(5.5)
Amortization of prior service benefits included in net income, net of tax of ($0.6), ($0.6), ($0.7)	(1.9)	(1.9)	(2.4)
Amortization of net actuarial loss included in net income, net of tax of $4.4, $3.6, $4.7	14.9	11.9	16.4
Reclassification adjustment for pension settlement charges included in net income, net of tax of $0.9, $0.0	2.9	0	0.1
Total other comprehensive income (loss), net of tax	10.4	5.4	(1.8)
Total comprehensive loss	$ (45.2)	$ (61.2)	$ (71.6)

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Unrealized loss on cash flow hedges arising during the period, tax	$ (3.4)	$ (3.7)	$ (1.4)
Reclassification adjustment for net losses included in net income, tax	2	0.5	0.3
Net (loss) gain arising from remeasurement during the period, tax	(0.8)	0.7	(1.6)
Amortization of prior service benefits included in net income, tax	(0.6)	(0.6)	(0.7)
Amortization of net actuarial loss included in net income, tax	4.4	$ 3.6	4.7
Reclassification adjustment for pension settlement charges included in net income, tax	$ 0.9		$ 0

Consolidated Statements of Shar

Consolidated Statements of Shareowners' Deficit - USD ($) shares in Millions, $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)		$ (140)		$ (75)	$ (140)	$ (75)	$ (117.9)
Net loss	$ (5.6)	(34)	$ (20.6)	(26.9)	(55.6)	(66.6)	(69.8)
Other comprehensive income (loss)					10.4	5.4	(1.8)
Shares issued under employee plans					0	0	0.2
Shares purchased under employee plans and other					(1.1)	(0.8)	(2.1)
Stock-based compensation					5.6	7.4	5.6
Dividends on preferred stock					(10.4)	(10.4)	(10.4)
Stock consideration for acquisition of Hawaiian Telcom							121.2
Ending Balance, Shareowners' Equity (Deficit)	(191.1)		(140)		(191.1)	(140)	(75)
Cumulative Convertible Preferred Shares [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)		$ 129.4		$ 129.4	$ 129.4	$ 129.4	$ 129.4
Beginning Balance, Shares		3.1		3.1	3.1	3.1	3.1
Ending Balance, Shareowners' Equity (Deficit)	$ 129.4		$ 129.4		$ 129.4	$ 129.4	$ 129.4
Ending Balance, Shares	3.1		3.1		3.1	3.1	3.1
Common Shares [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)		$ 0.5		$ 0.5	$ 0.5	$ 0.5	$ 0.4
Beginning Balance, Shares		50.4		50.2	50.4	50.2	42.2
Shares issued under employee plans					$ 0	$ 0	$ 0
Shares issued under employee plans, Shares					0.3	0.2	0.3
Stock consideration for acquisition of Hawaiian Telcom							$ 0.1
Stock consideration for acquisition of Hawaiian Telcom, Shares							7.7
Ending Balance, Shareowners' Equity (Deficit)	$ 0.5		$ 0.5		$ 0.5	$ 0.5	$ 0.5
Ending Balance, Shares	50.7		50.4		50.7	50.4	50.2
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)		$ 2,676.2		$ 2,680	$ 2,676.2	$ 2,680	$ 2,565.6
Shares issued under employee plans					0	0	0.2
Shares purchased under employee plans and other					(1.1)	(0.8)	(2.1)
Stock-based compensation					5.6	7.4	5.6
Dividends on preferred stock					(10.4)	(10.4)	(10.4)
Stock consideration for acquisition of Hawaiian Telcom							121.1
Ending Balance, Shareowners' Equity (Deficit)	$ 2,670.3		$ 2,676.2		2,670.3	2,676.2	2,680
Accumulated Deficit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)		(2,776)		(2,709.4)	(2,776)	(2,709.4)	(2,639.6)
Net loss					(55.6)	(66.6)	(69.8)
Ending Balance, Shareowners' Equity (Deficit)	(2,831.6)		(2,776)		(2,831.6)	(2,776)	(2,709.4)
Accumulated Other Comprehensive Loss [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)		$ (170.1)		$ (175.5)	(170.1)	(175.5)	(173.7)
Other comprehensive income (loss)					10.4	5.4	(1.8)
Ending Balance, Shareowners' Equity (Deficit)	$ (159.7)		$ (170.1)		$ (159.7)	$ (170.1)	$ (175.5)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities
Net loss	$ (55.6)	$ (66.6)	$ (69.8)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	293.4	304.9	252
Loss on extinguishment of debt, net	0	0	1.3
Provision for loss on receivables	14.7	12.5	8.4
Noncash portion of interest expense	5.5	6.2	5.4
Deferred income taxes	(27.7)	(10.9)	6.9
Pension and other postretirement payments less than (in excess of) expense	1	(0.1)	(7.2)
Stock-based compensation	5.6	7.4	5.6
Other, net	0.4	(5)	(3.5)
Changes in operating assets and liabilities:
(Increase) decrease in receivables	(74.9)	27.6	(83.1)
Decrease in inventory, materials, supplies, prepaid expenses and other current assets	5	5	2.2
Increase (decrease) in accounts payable	15.8	(40)	95.1
Increase in accrued and other current liabilities	6.8	13	10.5
Decrease (increase) in other noncurrent assets	13.7	9.3	(0.9)
Increase (decrease) in other noncurrent liabilities	2.4	(4.2)	(8.2)
Net cash provided by operating activities	206.1	259.1	214.7
Cash flows from investing activities
Capital expenditures	(223.6)	(223.8)	(220.6)
Acquisitions of businesses, net of cash acquired	0	0	(216.8)
Wireless spectrum license purchase	(6.4)	0	0
Other, net	3.6	0.5	0
Net cash used in investing activities	(226.4)	(223.3)	(437.4)
Cash flows from financing activities
Net increase (decrease) in corporate credit and receivables facilities with initial maturities less than 90 days	60.2	(6.1)	194.6
Repayment of debt	(22.4)	(21.5)	(328.7)
Debt issuance costs	(0.7)	(0.8)	(11.7)
Dividends paid on preferred stock	(10.4)	(10.4)	(10.4)
Other, net	(1.1)	(0.8)	(1.9)
Net cash provided by (used in) financing activities	25.6	(39.6)	(158.1)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0.3	0	(0.3)
Net increase (decrease) in cash, cash equivalents and restricted cash	5.6	(3.8)	(381.1)
Cash, cash equivalents and restricted cash at beginning of year	11.6	15.4	396.5
Cash, cash equivalents and restricted cash at end of year	$ 17.2	$ 11.6	$ 15.4

Description of Business and Acc

Description of Business and Accounting Policies	12 Months Ended
	Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Description of Business and Accounting Policies	1. Description of Business and Accounting Policies Description of Business — Cincinnati Bell Inc. and its consolidated subsidiaries ("Cincinnati Bell," "we," "our," "us" or the "Company") provides diversified telecommunications and technology services. The Company generates a large portion of its revenue by serving customers in Cincinnati, Ohio, Dayton, Ohio and the islands of Hawaii. An economic downturn or natural disaster occurring in these, or a portion of these, limited operating territories could have a disproportionate effect on our business, financial condition, results of operations and cash flows compared to similar companies of a national scope and similar companies operating in different geographic areas. As of December 31, 2020, we operate our business through the following segments: Entertainment and Communications and IT Services and Hardware. The Company has approximately 4,600 employees as of December 31, 2020. Approximately 25% of total employees are covered by collective bargaining agreements with the Communications Workers of America (“CWA”) and the International Brotherhood of Electrical Workers ("IBEW)" Local 1357. The effective dates for collective bargaining agreements with the CWA and IBEW range through the second quarter of 2021 and third quarter of 2022, respectively. Basis of Presentation — The consolidated financial statements of the Company have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC") and, in the opinion of management, include all adjustments necessary for a fair presentation of the results of operations, comprehensive income, financial position and cash flows for each period presented. Basis of Consolidation — The consolidated financial statements include the consolidated accounts of Cincinnati Bell Inc. and its majority-owned subsidiaries over which it exercises control. Intercompany accounts and transactions have been eliminated in the consolidated financial statements. Use of Estimates — The preparation of financial statements in conformity with generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect the amounts reported. Actual results could differ from those estimates. Significant items subject to such estimates and judgments include: the carrying value of property, plant and equipment; the valuation of allowances for receivables and deferred income taxes; reserves recorded for income tax exposures; assets and liabilities related to employee benefits; the valuation of deferred costs under Accounting Standards Codification ("ASC") 606, “Revenue Recognition”; purchase price allocation for acquired businesses; and the valuation of intangible assets and goodwill. In the normal course of business, the Company is also subject to various regulatory and tax proceedings, lawsuits, claims and other matters. The Company believes adequate provision has been made for all such asserted and unasserted claims in accordance with GAAP. Such matters are subject to many uncertainties and outcomes that are not predictable with assurance. We periodically review our estimates in light of changes in circumstances, facts and experience. The effects of material revisions in estimates are reflected in our financial statements prospectively from the date of the change in estimate. Cash, Cash Equivalents and Restricted Cash — Cash consists of funds held in bank accounts. Cash equivalents consist of short-term, highly liquid investments with original maturities of three months or less. Restricted cash consists of funds held in an escrow account associated with the pending transaction to acquire substantially all of the operating assets of Paniolo Cable Company, LLC (“Paniolo”). See Note 4 for further information related to this transaction. Restricted cash is included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the Consolidated Statements of Cash Flows. A reconciliation of cash, cash equivalents and restricted cash to the consolidated balance sheet follows: (dollars in millions) December 31, 2020 December 31, 2019 December 31, 2018 Cash and cash equivalents $ 12.2 $ 11.6 $ 15.4 Restricted cash included in Other noncurrent assets 5.0 — — Cash, cash equivalents and restricted cash per Consolidated Statements of Cash Flows $ 17.2 $ 11.6 $ 15.4 Receivables — Receivables consist principally of trade receivables from customers and are generally unsecured and due within 21 - 90 days . The Company has receivables with one customer, Verizon Communications Inc., which make up 20 % and 25 % of the outstanding accounts receiva ble balance at December 31, 2020 and 2019 , respectively. Unbilled receivables arise from services rendered but not yet billed. As of December 31, 2020 and 2019 , unbilled receivables totaled $ 41.0 million and $ 15.3 million, respectively. Expected credit losses related to trade receivables are recorded as an allowance for uncollectible accounts in the Consolidated Balance Sheets. The Company establishes the allowances for uncollectible accounts using percentages of aged accounts receivable balances to reflect the historical average of credit losses as well as specific provisions for certain identifiable, potentially uncollectible balances. When internal collection efforts on accounts have been exhausted, the accounts are written off and the associated allowance for un collectible accounts is reduced. In 2020, in response to the pandemic, the Company parti cipated in the Keep America ns C onnected Pledge (“Pledge”), and as a result, we temporarily suspended involuntary account terminations. The Company continued to record allowance for uncollectible accounts but write-offs were delayed until the expiration of the Pledge and past due accounts could pass through the standard collection process. Due to this reduction of write-offs in 2020, the allowance for uncollectible accounts is $ 23.0 million at December 31, 2020 compared to $ 14.3 million at December 31, 2019. Factoring Arrangements — In the second quarter of 2018, the Company executed an amendment of its Receivables Facility that includes an option for Cincinnati Bell Funding LLC (“CBF”) to sell certain receivables, on a non-recourse basis, directly to PNC Bank. The terms of the factoring arrangement provides for the factoring of certain receivables, which are purchased at the face amount of the receivable discounted at the annual rate of LIBOR plus a bank determined spread on the purchase date. Such sales of accounts receivable are reflected as a reduction of "Receivables, less allowances" in the Consolidated Balance Sheets as they meet the applicable criteria in ASC 860, "Transfers and Servicing." The fees recorded in relation to such sales of accounts receivable were immaterial in 2020 and $0.7 million in 2019, and are included in "Selling, general, and administrative" in the Consolidated Statements of Operations. As of December 31, 2020, there was no outstanding balance of receivables sold under the terms of the factoring agreement. As of December 31, 2019, the outstanding balance of receivables sold under the terms of the factoring agreement was $44.7 million. See Note 8 for further information related to the Receivables Facility Inventory, Materials and Supplies — Inventory, materials and supplies consists of network components, various telephony and IT equipment to be sold to customers, maintenance inventories, and other materials and supplies, which are carried at the lower of average cost or market. Property, Plant and Equipment — Property, plant and equipment is stated at original cost and presented net of accumulated depreciation and impairment losses. Property, plant and equipment acquired in conjunction with the acquisition of Hawaiian Telcom was stated at fair value in accordance with ASC 805, “Business Combinations.” Maintenance and repairs are charged to expense as incurred while improvements, which extend an asset's useful life or increase its functionality, are capitalized and depreciated over the asset's remaining life. The majority of the Entertainment and Communications network property, plant and equipment used to generate its voice and data revenue is depreciated using the group method, which develops a depreciation rate annually based on the average useful life of a specific group of assets rather than for each individual asset as would be utilized under the unit method. Provision for depreciation of other property, plant and equipment, except for leasehold improvements, is based on the straight-line method over the estimated economic useful life. Depreciation of leasehold improvements is based on a straight-line method over the lesser of the economic useful life of the asset or the term of the lease, including optional renewal periods if renewal of the lease is reasonably assured. Additions and improvements, including interest and certain labor costs incurred during the construction period, are capitalized. The Company records the fair value of a legal liability for an asset retirement obligation in the period it is incurred. The estimated removal cost is initially capitalized and depreciated over the remaining life of the underlying asset. The associated liability is accreted to its present value each period. Once the obligation is ultimately settled, any difference between the final cost and the recorded liability is recognized as gain or loss on disposition. Goodwill — Goodwill represents the excess of the purchase price consideration over the fair value of net assets acquired and recorded in connection with business acquisitions. Goodwill is allocated at the business segment level. Goodwill is tested for impairment on an annual basis or when events or changes in circumstances indicate that such assets may be impaired. If the net book value of the reporting unit exceeds its fair value, an impairment loss is recognized. An impairment loss is measured as the excess of the carrying value of goodwill of a reporting unit over its fair value. Indefinite-Lived Intangible Assets — Intangible assets represent purchased assets that lack physical substance but can be separately distinguished from goodwill because of contractual or legal rights, or because the asset is capable of being separately sold or exchanged. Federal Communications Commission ("FCC") licenses for wireless spectrum represent indefinite-lived intangible assets. The Company may renew the wireless licenses in a routine manner every ten years for a nominal fee, provided the Company continues to meet the service and geographic coverage provisions required by the FCC. Intangible assets not subject to amortization are tested for impairment annually, or when events or changes in circumstances indicate that the asset might be impaired. Annual impairment test was not considered necessary in 2020 due to transfer of the licenses occurring in the fourth quarter of 2020. Long-Lived Assets — Management reviews the carrying value of property, plant and equipment and other long-lived assets, including intangible assets with definite lives, when events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. An impairment loss is recognized when the estimated future undiscounted cash flows expected to result from the use of an asset (or group of assets) and its eventual disposition is less than its carrying amount. An impairment loss is measured as the amount by which the asset’s carrying value exceeds its estimated fair value. Long-lived intangible assets are amortized based on the estimated economic value generated by the asset in future years. Cost Method Investments — Certain of our cost method investments do not have readily determinable fair values. The carrying value of these investments was $6.9 million and $6.6 million as of December 31, 2020 and 2019, respectively, and was included in "Other noncurrent assets" in the Consolidated Balance Sheets. Investments are reviewed annually to determine if changes in circumstances exist that would indicate the carrying value may not be recoverable. If indicators are present then an analysis is performed to determine if carrying value exceeds the estimate fair value. Leases — The Company adheres to lease accounting principles described in ASC 842, “Leases.” Under ASC 842, the Company determines if an arrangement is a lease at inception based on the facts and circumstances present. In lease transactions where the Company acts as the lessor, the lease component is accounted for in accordance with ASC 842, and the non-lease component is accounted for in accordance with ASC 606. Although separation of lease and non-lease components is required, certain practical expedients are available that release the Company from this requirement. Adoption of the practical expedient allows the Company to account for each lease component and the related non-lease component together as a single component provided that the timing and patterns of revenue recognition for the components are the same and the combined, single unit of account would be classified as an operating lease. The Company's operating leases for certain services that include Customer Premise Equipment, including handsets and set-top boxes, have lease and non-lease components. In these arrangements, management has concluded that the non-lease components are the predominant characteristic, and, as a result, the Company has elected to account for these arrangements as one single non-lease component recorded as "Revenue" in the Consolidated Statements of Operations in accordance with ASC 606. Right-of-use assets represent our right to use an underlying asset for the lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Certain adjustments to the right-of-use asset may be required for items such as initial direct costs paid or incentives received. The Company's lease terms include options to extend, terminate or buyout the lease when it is reasonably certain that we will exercise that option. Leases that have contract prices based on variable factors, such as power usage, are recognized as variable lease expense in the period in which the obligation for those payments are incurred. Lease expense for variable lease payments is recognized on a straight-line basis over the lease term. Treasury Shares — The repurchase of common shares is recorded at purchase cost as treasury shares. Our policy is to retire, either formally or constructively, treasury shares that management anticipates will not be reissued. Upon retirement, the purchase cost of the treasury shares that exceeds par value is recorded as a reduction to “Additional paid-in capital” in the Consolidated Balance Sheets. Revenue Recognition — The Company adheres to revenue recognition principles described in ASC 606. Under ASC 606, revenue is recognized when the Company transfers promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. A good or service is considered to be transferred when the customer obtains control. Revenue derived from foreign operations is approximately 5%, 5% and 6% of consolidated revenue in 2020, 2019 and 2018, respectively. Entertainment and Communications — Revenues from local telephone, special access, internet product and video services, which are billed monthly prior to performance of service, are not recognized upon billing or cash receipt but rather are deferred until the service is provided. Consumer long distance, switched access and other usage based charges are billed monthly in arrears. Entertainment and Communications bills service revenue in regular monthly cycles, which are spread throughout the days of the month. As the last day of each billing cycle rarely coincides with the end of the reporting period for usage-based services such as long distance and switched access, we must estimate service revenues earned but not yet billed. These estimates are based upon historical usage, and we adjust these estimates during the period in which actual usage is determinable, typically in the following reporting period. Pricing of local voice services is generally subject to oversight by both state and federal regulatory commissions. Such regulation also covers services, competition, and other public policy issues. Various regulatory rulings and interpretations could result in increases or decreases to revenue in future periods. For long-term indefeasible right of use, or IRU, contracts for fiber circuit capacity, the Company may receive up-front payments for services to be delivered for a period of up to 25 years. In these situations, the Company defers the revenue and amortizes it on a straight-line basis to earnings over the term of the contract. See Note 3 for further information. IT Services and Hardware — Revenue is generally recognized as the service is provided. Maintenance on telephony equipment is deferred and recognized ratably over the term of the underlying customer contract, generally one to three years. For hardware sales, revenue is recognized net of the cost of product and is recognized when the hardware is either shipped or delivered in accordance with the terms of the contract. Installation service revenue is generally recognized when installation is complete. We sell equipment and installation services on both a combined and standalone basis. For the sale of hardware within the Infrastructure Solutions category, the Company evaluated whether it is the principal (in which case we report revenues on a gross basis) or the agent (in which case we report revenues on a net basis). The Company has concluded it acts as an agent because it does not control the inventory before it is transferred to customers, it does not have the ability to direct the product to anyone besides the purchasing customer, and it does not integrate the hardware with any of its own goods or services. Advertising Expenses — Costs related to advertising are expensed as incurred. Advertising costs were $15.6 million, $18.6 million, and $14.2 million in 2020, 2019, and 2018, respectively. Legal Expenses — In the normal course of business, the Company is involved in various claims and legal proceedings. Legal costs incurred in connection with loss contingencies are expensed as incurred. Legal claim accruals are recorded once determined to be both probable and estimable. Income, Operating, and Regulatory Taxes Income taxes — The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction as well as various foreign, state and local jurisdictions. The provision for income taxes is based upon income in the consolidated financial statements, rather than amounts reported on the income tax return. The income tax provision consists of an amount for taxes currently payable and an amount for tax consequences deferred to future periods. Deferred income taxes are provided for temporary differences between financial statement and income tax assets and liabilities. Deferred income taxes are recalculated annually at rates then in effect. Valuation allowances are recorded to reduce deferred tax assets to amounts that are more likely than not to be realized. The ultimate realization of the deferred income tax assets depends upon the ability to generate future taxable income during the periods in which basis differences and other deductions become deductible and prior to the expiration of the net operating loss carryforwards. Previous tax filings are subject to normal reviews by regulatory agencies until the related statute of limitations expires. Operating taxes — Certain operating taxes such as property, sales, use, and gross receipts taxes are reported as expenses in operating income primarily within cost of services. These taxes are not included in income tax expense because the amounts to be paid are not dependent on our level of income. Liabilities for audit exposures are established based on management's assessment of the probability of payment. The provision for such liabilities is recognized as either property, plant and equipment, operating tax expense, or depreciation expense depending on the nature of the audit exposure. Upon resolution of an audit, any remaining liability not paid is released against the account in which it was originally recorded. Regulatory taxes — The Company incurs federal and state regulatory taxes on certain revenue producing transactions. We are permitted to recover certain of these taxes by billing the customer; however, collections cannot exceed the amount due to the federal regulatory agency. These federal regulatory taxes are presented in revenue and cost of services on a gross basis because, while the Company is required to pay the tax, it is not required to collect the tax from customers and, in fact, does not collect the tax from customers in certain instances. The amounts recorded as revenue for 2020, 2019 and 2018 were $32.2 million, $29.2 million and $22.2 million, respectively. The amounts reported as expense for 2020, 2019 and 2018 were $34.2 million, $32.5 million, and $23.4 million, respectively. We record all other federal taxes collected from customers on a net basis. Stock-Based Compensation — Compensation cost is recognized for all share-based awards to employees and non-employee directors. We value all share-based awards to employees at fair value on the date of grant and expense this amount over the required service period, generally defined as the applicable vesting period. For awards which contain a performance condition, compensation expense is recognized over the service period, when achievement of the performance condition is deemed probable. The fair value of stock options and stock appreciation rights is determined using the Black-Scholes option-pricing model using assumptions such as volatility, risk-free interest rate, holding period and dividends. The fair value of stock awards is based on the Company’s closing share price on the date of grant. For all share-based payments, the Company accounts for forfeitures as they occur. Actual forfeiture activity reduces the total fair value of the awards to be recognized as compensation expense. When an award is granted to an employee who is retirement eligible, the compensation cost is recognized over the service period up to the date that the employee first becomes eligible to retire. Pension and Postretirement Benefit Plans — The Company maintains qualified and non-qualified defined benefit pension plans, and also provides postretirement healthcare and life insurance benefits for eligible employees. We recognize the overfunded or underfunded status of the defined benefit pension and other postretirement benefit plans as either an asset or liability. Changes in the funded status of these plans are recognized as a component of comprehensive income (loss) in the year they occur. Pension and postretirement healthcare and life insurance benefits earned during the year and interest on the projected benefit obligations are accrued and recognized currently in net periodic benefit cost. Prior service costs and credits are amortized over the average remaining life expectancy of participants or remaining service period, based upon whether plan participants are mostly retirees or active employees. Net gains or losses resulting from differences between actuarial estimates or from changes in actuarial assumptions are recognized as a component of annual net periodic benefit cost. Unrecognized actuarial gains or losses that exceed 10% of the projected benefit obligation are amortized on a straight-line basis over the average remaining service life of active employees for the Cincinnati pension plans (approximately 7 - 11 years ) and Hawaii postretirement plans (approximately 7 - 8 years ), average remaining life expectancy of retirees for the Cincinnati postretirement plan s (approximately 14-15 years ) and average remaining life expectancy of participants for the Hawaii union pension plan (approximately 31 years ) . The accumulated gains or losses associated with the nonunion Hawaii pension plan do not exceed the corridor requiring amortization. Derivative Financial Instruments — The Company accounts for derivative financial instruments by recognizing derivative instruments as either assets or liabilities in the Consolidated Balance Sheets at fair value and recognizing the resulting gains or losses as adjustments to the Consolidated Statements of Operations or "Accumulated Other Comprehensive Loss." The Company does not hold or issue derivative financial instruments for trading or speculative purposes. For Business Combinations — In accounting for business combinations, we apply the accounting requirements of ASC 805, which requires the recording of net assets of acquired businesses at fair value. The Company utilizes management estimates and an independent third-party valuation firm to assist in determining the fair values of acquired assets and assumed liabilities. In developing estimates of the fair value of net assets, the Company analyzes a variety of factors including market data, estimated future cash flows of the acquired operations, industry growth rates, current replacement cost for fixed assets, and market rate assumptions for contractual obligations. Such a valuation requires management to make significant estimates and assumptions, particularly with respect to the intangible assets. Fair Value Measurements — Fair value of financial and non-financial assets and liabilities is defined as the price representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value is utilized to measure certain investments on a recurring basis. Fair value measurements are also utilized to determine the initial value of assets and liabilities acquired in a business combination, to perform impairment tests, and for disclosure purposes. Management uses quoted market prices and observable inputs to the maximum extent possible when measuring fair value. In the absence of quoted market prices or observable inputs, fair value is determined using valuation models that incorporate assumptions that a market participant would use in pricing the asset or liability. Fair value measurements are classified within one of three levels, which prioritize the inputs used in the methodologies of measuring fair value for assets and liabilities, as follows: Level 1 — Quoted market prices for identical instruments in an active market; Level 2 — Quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs); and Level 3 — Unobservable inputs that reflect management's determination of assumptions that market participants would use in pricing the asset or liability. These inputs are developed based on the best information available, including our own data. The determination of where an asset or liability falls in the hierarchy requires significant judgment. Foreign Currency Translation and Transactions — The financial position of foreign subsidiaries is translated at the exchange rates in effect at the end of the period, while revenues and expenses are translated at average rates of exchange during the period. Gains or losses from translation of foreign operations where the local currency is the functional currency are included as components of accumulated other comprehensive income. Gains and losses arising from foreign currency transactions are recorded in "Other (income) expense, net" in the period incurred.

Recently Issued Accounting Stan

Recently Issued Accounting Standards	12 Months Ended
	Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Recently Issued Accounting Standards	2. Recently Issued Accounting Standards In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2016-02, Leases, which represents a wholesale change to lease accounting. Since that date, the FASB has issued additional ASUs clarifying certain aspects of ASU 2016-02 but did not change the core principal. The standard introduces a lessee model that brings most leases onto the balance sheet, as well as aligns certain underlying principles of the new lessor model with those in ASC 606. The ASU is effective for public entities for fiscal years beginning after December 15, 2018. The Company adopted the standard and all subsequent amendments effective January 1, 2019, using the modified retrospective transition method, which did not require the Company to adjust comparative periods. The Company elected the package of practical expedients permitted under the transition guidance, which allowed the Company to carryforward its historical assessments of: (1) whether contracts are or contain leases, (2) lease classification and (3) initial direct costs. In addition to the package of practical expedients, the Company elected the practical expedients of using hindsight in determining the lease term and in assessing impairment of the entity’s right-of-use assets as well as not to assess whether existing or expired land easements that were not previously accounted for as leases under ASC 840 are or contain a lease under ASC 842. Upon adoption of this standard, the Company recognized operating lease right-of-use assets of $38.3 million and operating lease liabilities of $46.2 million in the Consolidated Balance Sheets for 2019. The Company elected the practical expedient outlined in ASU 2018-11 allowing entities to initially apply the new lease standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The adoption of ASU 2016-02 had no impact to accumulated deficit. The Company implemented internal controls and procured a third-party lease accounting software solution to facilitate the ongoing accounting and financial reporting requirements of the ASU. The standard did not have a material impact on our Consolidated Statements of Operations for 2019. The most significant impact was the recognition of right-of-use assets and lease liabilities for operating leases, while our accounting for finance leases remained substantially unchanged. See Note 9 for required disclosures as a result of adopting ASC 842. In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326), which replaces the incurred loss model with the current expected credit loss (“CECL”) model to estimate credit losses for financial assets measured at amortized cost and certain off-balance sheet credit exposures. The CECL model requires a company to estimate credit losses expected over the life of the financial assets based on all relevant information including historical information, current conditions and reasonable and supportable forecasts that affect the collectability of the amounts. This standard is effective for public entities for fiscal years beginning after December 15, 2019. The standard requires a modified retrospective approach by recording a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. ASU 2016-13 was amended in November 2018 by the provisions of ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, in April 2019 by the provisions of ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, in May 2019 by the provisions of ASU 2019-05, Financial Instruments – Credit Loses (Topic 326), and in November 2019 by the provisions of ASU 2019-11, Codification Improvements to Topic 326, Financial Instruments – Credit Losses. The Company adopted this ASU and all subsequent amendments effective January 1, 2020. In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software, which aligns the accounting for implementation costs incurred in a hosting arrangement that is a service contract with the requirements in ASC 350-40 for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments in this ASU also require the entity to present the expense related to the capitalized implementation costs in the same line item in the statement of income as the fees associated with the hosting element of the arrangement and classify payments for capitalized implementation costs in the statement of cash flows in the same manner as payments made for fees associated with the hosting element. The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. The amendments should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Early adoption is permitted in any interim period after issuance of the update. The Company early adopted this standard prospectively effective January 1, 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes, eliminates certain exceptions within Income Taxes (740) In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting . The ASU is intended to provide temporary optional expedients and exceptions to the U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates. These amendments are effective as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020 and may be applied prospectively to contract modifications made and hedging relationships entered into or evaluated on or before December 31, 2022. The Company is currently evaluating our contracts and the optional expedients provided by the new standard. In August 2020, the FASB issued ASU 2020-06, Subtopic 470-20 Subtopic 815-40 Other accounting standards that have been issued or proposed by the FASB or other standards-setting bodies that do not require adoption until a future date are not expected to have a material impact on the Company’s consolidated financial statements upon adoption.

Revenue

Revenue	12 Months Ended
	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Revenue	3. Revenue The Entertainment and Communications segment provides products and services to both consumer and enterprise customers that can be categorized as either Fioptics in Cincinnati or Consumer/SMB Fiber in Hawaii (collectively, "Consumer/SMB Fiber"), Enterprise Fiber or Legacy. The products and services within these three categories can be further categorized as either Data, Voice, Video or Other. Consumer/SMB Fiber and Legacy revenue include both consumer and commercial customers. Enterprise Fiber revenue includes ethernet and dedicated internet access services that are provided to enterprise customers. Enterprise Fiber also includes revenue associated with the Southeast Asia to United States ("SEA-US") trans-Pacific submarine cable system, which was acquired in conjunction with the acquisition of Hawaiian Telcom in the third quarter of 2018, and connects Indonesia, the Philippines, Guam, Hawaii and the mainland United States. Residential customers have implied month-to-month contracts, while commercial customers, with the exception of contracts associated with the SEA-US cable system, typically have contracts with a duration of one to five years and automatically renew on a month-to-month basis. Customers are invoiced on a monthly basis for services rendered. Contracts for projects that are included within the Other revenue stream are typically short in duration and less than one year. Contracts associated with the SEA-US cable system typically range from 15 to 25 years and payment is prepaid. The IT Services and Hardware segment provides a full range of Information Technology ("IT") solutions, including Communications, Cloud and Consulting services. IT Services and Hardware customers enter into contracts that have a typical duration of one to five years, with varied renewal options at the end of the term. Customers are invoiced on a monthly basis for services rendered. The IT Services and Hardware segment also provides enterprise customers with Infrastructure Solutions, which includes the sale of hardware and maintenance contracts. These contracts are typically satisfied in less than twelve months and revenue is recognized at a point in time. The Company has elected the practical expedient described in ASC 606-10-32-18 that allows an entity to not adjust the promised amount of consideration for the effects of a significant financing component if the entity expects that the period of time between the transfer of a promised good or service to the customer and when the customer pays for such good or service will be one year or less. Customers are typically billed immediately upon the rendering of services or the delivery of products. Payment terms for customers are between 30 and 120 days. Subsequent to the acquisition of Hawaiian Telcom, the Company began recognizing a financing component associated with the up-front payments for services to be delivered under indefeasible right of use ("IRU") contracts for fiber circuit capacity. The IRU contracts are associated with the SEA-US cable system. The IRU contracts typically have a duration ranging from 15 to 25 years. Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, or a series of distinct goods or services, and is the unit of account defined in ASC Topic 606. The transaction price identified in the contract is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. Contract modifications for changes to services provided are routine throughout the term of our contracts. In most instances, contract modifications are for the addition or reduction of services that are distinct, and price changes are based on the stand-alone selling price of the service and, as such, are accounted for on a prospective basis as a new contract. Goods and services are sold individually, or a contract may include multiple goods or services. For contracts with multiple goods and services, the contract transaction price is allocated to each performance obligation using the stand-alone selling price of each distinct good or service in the contract. Certain customers of the Company may receive cash-based rebates based on volume of sales, which are accounted for as variable consideration. Potential rebates are considered at contract inception in our estimate of transaction price based on the projected volume of sales. Estimates are reassessed quarterly. Performance obligations are satisfied either over time as services are performed or at a point in time. Substantially all of our service revenue is recognized over time. For services transferred over time, the Company has elected the practical expedient to recognize revenue based on amounts invoiced to the customer as the Company has concluded that the invoice amount directly corresponds with the value of services provided to the customer. Management considers this a faithful depiction of the transfer of control as services are provided evenly over the month and are substantially the same over the life of the contract. As the Company has elected the practical expedients detailed at ASC 606-10-50-13, revenue for these unsatisfied performance obligations that will be billed in future periods has not been disclosed. As of December 31, 2020, our estimated revenue, including a financing component, expected to be recognized in the future related to performance obligations associated with customer contracts that are unsatisfied (or partially unsatisfied) is $34.8 million. Approximately 80% of this revenue is related to IRU contracts associated with the SEA-US cable system (see Note 10). Certain IRU contracts extend for periods of up to 30 years and are invoiced at the beginning of the contract term. The revenue from such contracts is recognized over time as services are provided over the contract term. The expected revenue to be recognized for existing IRU contracts is as follows: (dollars in millions) 2021 $ 2.5 2022 2.6 2023 2.5 2024 2.6 2025 2.6 Thereafter 22.0 Entertainment and Communications The Company has identified four distinct performance obligations in the Entertainment and Communications segment, namely Data, Voice, Video and Other. For each of the Data, Voice and Video services, service is delivered to the customer continuously and in a substantially similar manner for each period of the agreement, the customer takes full control over the services as the service is delivered, and as such, Data, Voice and Video are identified to be a series of distinct services. Services provided by the Entertainment and Communications segment can be categorized into three main categories that include Consumer/SMB Fiber, Enterprise Fiber and Legacy, each of which may include one or more of the aforementioned performance obligations. Data services include high-speed internet access, digital subscriber lines, ethernet, routed network services, SONET (Synchronous Optical Network), dedicated internet access, wavelength, digital signal and IRU revenue. Voice services include traditional and fiber voice lines, switched access, digital trunking and consumer long distance calling. Video services are offered through our fiber network to residential and commercial customers based on various standard plans with the opportunity to add premium channels. To receive video services, customers are required to use the Company's set top boxes that are billed as part of the monthly recurring service. Set top boxes are not considered a separate performance obligation from video because the equipment is necessary for the service to operate and the customer has no alternative use for the equipment. Services and products not included in Data, Voice or Video are included in Other revenue and are comprised of wire care, wire time and materials projects and advertising. Transfer of control of these services and products is evaluated on an individual project basis and can occur over time or at a point in time. The Company uses multiple methods to determine stand-alone selling prices in the Entertainment and Communications segment. For Data, Video and Voice products in Consumer/SMB Fiber, market rate is the primary method used to determine stand-alone selling prices. For Data performance obligations under the Enterprise Fiber category, and Voice, Data and Other performance obligations under the Legacy category, stand-alone selling prices are determined based on a list price, discount off of list price, a tariff rate, a margin percentage range, or a minimum margin percentage. IT Services and Hardware The Company has identified four distinct performance obligations in the IT Services and Hardware segment. These performance obligations are Communications, Cloud, Consulting and Infrastructure Solutions. Communications services are monthly services that include data and VoIP services, tailored solutions that include converged IP communications of data, voice, video and mobility applications, enterprise long distance, MPLS (Multi-Protocol Label Switching) and conferencing services. Cloud services include storage, backup, disaster recovery, SLA-based monitoring and management, cloud computing and cloud consulting. Consulting services provide customers with IT staffing, consulting and emerging technology solutions. Infrastructure Solutions includes the sale of hardware and maintenance contracts as well as installation projects. For the sale of hardware, the Company evaluated whether it is the principal or the agent. The Company has concluded it acts as an agent because it does not control the inventory before it is transferred to customers, it does not have the ability to direct the product to anyone besides the purchasing customer, and it does not integrate the hardware with any of its own goods or services. Based on this assessment, the performance obligation is to arrange a sale of hardware between the vendor and the customer. In the instance where there is an issue with the hardware, the Company coordinates with the manufacturer to facilitate a return in accordance with the standard manufacturer warranty. Hardware returns are not significant to the Company. Within the IT Services and Hardware segment, stand-alone selling prices for the four performance obligations are determined based on either a margin percentage range, minimum margin percentage or standard price list. For hardware sales, revenue is recognized net of the cost of product and is recognized when the hardware is shipped or delivered in accordance with the terms of the contract. For certain projects within Communications and Consulting, revenue is recognized when the customer communicates acceptance of the services performed. For contracts with freight on board shipping terms, management has elected to account for shipping and handling as activities to fulfill the promise to transfer the good, and therefore, has not evaluated whether shipping and handling activities are promised services to its customers. Contract Balances The Company recognizes incremental fulfillment costs as an asset when installation expenses are incurred as part of performing the agreement for Voice, Video and Data product offerings in the Entertainment and Communications segment in which the contract life is longer than one year. These fulfillment costs are amortized ratably over the expected life of the customer, which is representative of the expected period of benefit of the asset capitalized. The expected life of the customer is determined utilizing the average churn rate for each product. The Company calculates average churn based on the historical average customer life. We also recognize an asset for incremental fulfillment costs for certain Communications services in the IT Services and Hardware segment that require us to incur installation and provisioning expenses. The asset recognized for Communication services is amortized over the average contract life. Churn rates and average contract life are reviewed on an annual basis. Fulfillment costs are capitalized to “Other noncurrent assets.” The related amortization expense is recorded to “Cost of services and products.” The Company recognizes an asset for the incremental costs of acquiring a contract with a customer if we expect the benefit of those costs to be longer than one year. We have determined that certain sales incentive programs related to Voice, Video, Data and certain Communications and Cloud services meet the requirements to be capitalized. The contract asset established for the costs of acquiring a contract is recorded to “Other noncurrent assets.” Sales incentives are amortized ratably over the period that services are delivered using either an average churn rate or average contract term, both representative of the expected period of benefit of the asset capitalized. Customer churn rates and average contract term assumptions are reviewed on an annual basis. The related amortization expense is recorded to “Selling, general and administrative.” Management has elected to use the practical expedient detailed in ASC 340-40-25-4 to expense any costs to fulfill a contract and costs to obtain a contract as they are incurred when the amortization period would be one year or less. This practical expedient has been applied to fulfillment costs that include installation costs associated with wiring projects and certain Cloud services. In addition, this practical expedient has been applied to acquisition costs associated with revenue from certain Communications projects. The following table presents the activity for the Company’s contract assets: Fulfillment Costs Cost of Acquisition Total Contract Assets Entertainment IT Services Entertainment IT Services Entertainment IT Services and and Total and and Total and and Total (dollars in millions) Communications Hardware Company Communications Hardware Company Communications Hardware Company Balance as of December 31, 2017 $ 17.5 $ 2.0 $ 19.5 $ 11.6 $ 1.3 $ 12.9 $ 29.1 $ 3.3 $ 32.4 Additions 9.9 1.9 11.8 7.9 1.7 9.6 17.8 3.6 21.4 Amortization (12.9 ) (1.4 ) (14.3 ) (6.5 ) (1.0 ) (7.5 ) (19.4 ) (2.4 ) (21.8 ) Balance as of December 31, 2018 14.5 2.5 17.0 13.0 2.0 15.0 27.5 4.5 32.0 Additions 3.6 3.5 7.1 10.0 1.6 11.6 13.6 5.1 18.7 Amortization (10.1 ) (1.9 ) (12.0 ) (8.2 ) (1.3 ) (9.5 ) (18.3 ) (3.2 ) (21.5 ) Balance as of December 31, 2019 8.0 4.1 12.1 14.8 2.3 17.1 22.8 6.4 29.2 Additions 3.6 2.2 5.8 9.4 3.5 12.9 13.0 5.7 18.7 Amortization (8.1 ) (2.4 ) (10.5 ) (8.4 ) (2.2 ) (10.6 ) (16.5 ) (4.6 ) (21.1 ) Balance as of December 31, 2020 $ 3.5 $ 3.9 $ 7.4 $ 15.8 $ 3.6 $ 19.4 $ 19.3 $ 7.5 $ 26.8 The Company recognizes a liability for cash received upfront for IRU contracts. At December 31, 2020 and 2019, $1.6 million and $1.5 million, respectively, of contract liabilities were included in "Other current liabilities." At December 31, 2020 and 2019, $26.2 million and $27.1 million, respectively, of contract liabilities were included in "Other noncurrent liabilities." Disaggregated Revenue The following table presents revenues disaggregated by product and service lines: Year ended December 31, (dollars in millions) 2020 2019 2018 Data $ 479.4 $ 475.0 $ 402.6 Video 193.8 203.0 183.3 Voice 262.8 284.9 244.9 Other 33.6 32.8 22.6 Total Entertainment and Communications 969.6 995.7 853.4 Consulting 196.0 152.6 138.7 Cloud 86.2 92.1 98.0 Communications 215.0 198.7 178.5 Infrastructure Solutions 119.4 124.0 135.7 Total IT Services and Hardware 616.6 567.4 550.9 Intersegment revenue (26.4 ) (26.4 ) (26.1 ) Total revenue $ 1,559.8 $ 1,536.7 $ 1,378.2 In the first quarter of 2019, the Company determined that certain revenue in the IT Services and Hardware segment associated with nonrecurring projects is better aligned with Infrastructure Solutions, rather than Consulting, where it was previously reported. As a result, the Company reclassed revenue of $26.6 million from Consulting to Infrastructure Solutions for the twelve months ended December 31, 2018. This reclassification of revenue had no impact on the Consolidated Statements of Operations. Year ended December 31, (dollars in millions) 2020 2019 2018 Entertainment and Communications Products and services transferred at a point in time $ 27.9 $ 31.7 $ 25.3 Products and services transferred over time 922.0 942.4 805.8 Intersegment revenue 19.7 21.6 22.3 Total Entertainment and Communications 969.6 995.7 853.4 IT Services and Hardware Products and services transferred at a point in time 127.9 138.7 142.9 Products and services transferred over time 482.0 423.9 404.2 Intersegment revenue 6.7 4.8 3.8 Total IT Services and Hardware 616.6 567.4 550.9 Total Revenue Total products and services transferred at a point in time 155.8 170.4 168.2 Total products and services transferred over time 1,404.0 1,366.3 1,210.0 Total revenue $ 1,559.8 $ 1,536.7 $ 1,378.2

Mergers and Acquisitions

Mergers and Acquisitions	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Mergers and Acquisitions	4. Mergers and Acquisitions Acquisition of Hawaiian Telcom Holdco, Inc. On July 2, 2018, the Company acquired Hawaiian Telcom Holdco, Inc. ("Hawaiian Telcom") for cash consideration of $218.3 million, stock consideration of $121.2 million and debt repayments, including accrued interest, of $318.2 million. Hawaiian Telcom is the ILEC for the State of Hawaii and the largest full service provider of communication services and products in the state. With the acquisition, the Company gains access to both Honolulu, a well-developed, fiber-rich city, as well as the growing neighbor islands. The companies' combined fiber networks are nearly 17,800 fiber route miles. The purchase price for Hawaiian Telcom consisted of the following: (dollars in millions) Cash consideration plus debt assumed $ 536.5 Cincinnati Bell Inc. stock issued 121.2 Debt repayment (318.2 ) Total purchase price $ 339.5 In order to fund the acquisition, the Company utilized proceeds of $350.0 million from the 8% Senior Notes due 2025 ("8% Notes"), $16.5 million of the cash that was previously restricted to fund interest payments on the 8% Notes, drew $35.0 million on the Revolving credit facility and $154.0 million on the accounts receivable securitization facility (see Note 8). In conjunction with the acquisition, the Company issued 7.7 million Common Shares at a price of $15.70 per share as stock consideration. The Company recorded a total of $28.1 million in acquisition expenses related to the acquisition of Hawaiian Telcom, of which $0.9 million and $19.2 million were recorded in 2019 and 2018, respectively. These expenses are recorded in "Transaction and integration costs" on the Consolidated Statements of Operations. Purchase Price Allocation and Other Items The determination of the purchase price allocation to specific assets acquired and liabilities assumed is final for the Hawaiian Telcom transaction. The purchase price for Hawaiian Telcom has been allocated to individual assets acquired and liabilities assumed as follows: (dollars in millions) Hawaiian Telcom Assets acquired Cash $ 4.3 Receivables 24.8 Inventory, materials and supplies 6.7 Prepaid expenses and other current assets 5.9 Property, plant and equipment 697.6 Goodwill 10.2 Intangible assets 52.0 Deferred income tax asset 45.6 Other noncurrent assets 2.1 Total assets acquired 849.2 Liabilities assumed Accounts payable 60.0 Current portion of long-term debt 10.2 Unearned revenue and customer deposits 13.5 Accrued expenses and other current liabilities 21.8 Long-term debt, less current portion 304.5 Pension and postretirement benefit obligations 68.9 Other noncurrent liabilities 30.8 Total liabilities assumed 509.7 Net assets acquired $ 339.5 During 2019 and 2018, the Company recorded immaterial measurement period adjustments for Hawaiian Telcom. The offset of these adjustments were recorded as an increase to "Goodwill." The revenues and net income of Hawaiian Telcom included in the Consolidated Statements of Operations from the acquisition date through December 31, 2018 were $175.0 million and $0.7 million, respectively. The estimated fair value of identifiable intangible assets and their estimated useful lives are as follows: Hawaiian Telcom (dollars in millions) Fair Value Useful Lives Customer relationships $ 26.0 15 years Trade name 26.0 15 years Total identifiable intangible assets $ 52.0 The goodwill for Hawaiian Telcom is attributable to the acquired workforce in Honolulu and the neighbor islands, deep fiber infrastructures that include direct access to the SEA-US cable linking the U.S. with Asia and increased access to a diversified customer base. Pro Forma Information (Unaudited) The following table provides the unaudited pro forma results of operations for the year ended 2018 as if the acquisition of Hawaiian Telcom had taken place as of the beginning of fiscal year 2017. These pro forma results include adjustments related to the financing of the acquisitions, an increase to depreciation and amortization associated with the higher values of property, plant and equipment and intangible assets, an increase to interest expense for the additional debt incurred to complete the acquisitions, and reflects the related income tax effect and change in tax status. The pro forma information does not necessarily reflect the actual results of operations had the acquisitions been consummated at the beginning of the annual reporting period indicated, nor is it necessarily indicative of future operating results. The pro forma information does not include any (i) potential revenue enhancements, cost synergies or other operating efficiencies that could result from the acquisitions or (ii) transaction or integration costs relating to the acquisitions. Year Ended December 31, (dollars in millions, except per share amounts) 2018 Revenue $ 1,556.5 Net loss applicable to common shareholders (77.2 ) Earnings per share: Basic and diluted loss per common share (1.54 ) Pending Acquisition by MIP On December 21, 2019, the Company entered into an Agreement and Plan of Merger (as amended from time to time, the “Brookfield Merger Agreement”) with affiliates of the Brookfield Infrastructure Group (“Brookfield”), the infrastructure investment division of Brookfield Asset Management, which was subsequently amended. Pursuant to the amended Brookfield Merger Agreement, the Company would be acquired by an affiliate of Brookfield for $14.50 per Common Share. On March 13, 2020, the Company terminated the Brookfield Merger Agreement and entered into an Agreement and Plan of Merger (the “MIP Merger Agreement”) pursuant to which the Company will be acquired by an affiliate of Macquarie Infrastructure Partners V (“MIP”), a fund managed by Macquarie Infrastructure and Real Assets (the “MIP Merger”). At the effective time of the MIP Merger (the “Effective Time”), each of our issued and outstanding Common Shares will be converted into the right to receive $15.50 in cash per Common Share, without interest, and the 6 3/4 3 4 In connection with the termination of the Brookfield Merger Agreement in the first quarter of 2020, the Company paid to an affiliate of Brookfield a termination fee of $24.8 million as required by the terms of the Brookfield Merger Agreement. The termination fee is recorded in “Transaction and integration costs” on the Condensed Consolidated Statements of Operations. The consummation of the MIP Merger is subject to customary closing conditions, including (i) the adoption of the MIP Merger Agreement by the affirmative vote of the holders of at least two-thirds of all outstanding Common Shares and 6 3 4 The MIP Merger Agreement contains representations and warranties and covenants of the parties customary for a transaction of this nature. The MIP Merger is expected to close in the first half of 2021, although there can be no assurance that the MIP Merger will occur by that date. At the Effective Time, the Company will cease to be a publicly traded company as a result of the completion of the MIP Merger. Consent Solicitation for 7.000% Senior Notes due 2024 and 8.000% Senior Notes due 2025 On June 15, 2020, the Company announced that it had commenced consent solicitations (the “Consent Solicitations”) with respect to certain proposed amendments to the change of control provisions contained in the (i) indenture, dated as of September 22, 2016 (as supplemented and amended, the “2024 Notes Indenture”) governing its 7.000% Senior Notes due 2024 (the “2024 Notes”) and (ii) indenture, dated as of October 6, 2017 (as supplemented and amended, the “2025 Notes Indenture,” and together with the 2024 Notes Indenture, the “Indentures”) governing its 8.000% Senior Notes due 2025 (the “2025 Notes,” and together with the 2024 Notes, the “Notes”). Upon the terms and subject to the conditions described in the consent solicitation statement, dated June 15, 2020 (as supplemented and amended, the “ Consent Solicitation Statement ” ) , the Company solicit ed consents in order to (i) amend the definition of “Change of Control” in the Indentures so that the MIP Merger would not constitute a Change of Control and (ii) add a definition of, and designate certain persons, including MIP and its affiliates and Ares Management Corporation and its affiliates as, “Permitted Holders” (collectively, the “Proposed Amendments”). On July 2, 2020 (the “Effective Date”), following receipt of the requisite consents from holders of each series of Notes with respect to the Proposed Amendments pursuant to the Consent Solicitations, the Company, certain of the Company’s subsidiaries, as guarantors, and Regions Bank, as trustee, entered into a sixth supplemental indenture, dated as of July 2, 2020 (the “Sixth Supplemental Indenture”) to the 2024 Notes Indenture and a second supplemental indenture, dated as of July 2, 2020 to the 2025 Notes Indenture (the “Second Supplemental Indenture”, and together with the Sixth Supplemental Indenture, the “Supplemental Indentures”). Subject to the terms and conditions in the Consent Solicitation Statement (including the consummation of the MIP Merger), holders who validly delivered (and did not validly revoke) their consents on or prior to the Effective Date are eligible to receive (i) with respect to the 2024 Notes, an aggregate cash payment of $2,812,500, on a pro rata basis (based on aggregate principal amount of 2024 Notes for which consents have been validly delivered and not revoked), and (ii) with respect to the 2025 Notes, an aggregate cash payment of $1,050,000, on a pro rata basis (based on aggregate principal amount of 2025 Notes for which consents have been validly delivered and not revoked). The Company expects to make this cash payment substantially concurrently with the consummation of the MIP Merger. The Supplemental Indentures became effective upon execution thereof, but the Proposed Amendments will only become operative upon the occurrence of certain conditions described in the Supplemental Indentures, including payment of the consent fees pursuant to the Consent Solicitations. If the conditions described in the Supplemental Indentures are not satisfied, the Indentures will revert to the form in effect immediately prior to the Effective Date. In addition, subject to the terms and conditions described in the Consent Solicitation Statement and upon satisfaction or waiver of such conditions, including the consummation of the MIP Merger, the Company will secure the Notes and the related guarantees on a pari passu Pending Acquisition of Paniolo Fiber Assets On November 30, 2020, the Company entered into a definitive purchase agreement to acquire substantially all of the operating assets of Paniolo Cable Company, LLC, currently held by the bankruptcy estate of Paniolo, which include inter-island submarine and middle-mile terrestrial fiber infrastructure assets. The Company plans to account for the Paniolo acquisition as an asset acquisition under ASC 805-10-55 “Business Combinations” because the assets to be acquired from Paniolo do not include an assembled workforce, and the gross value of the assets to be acquired meets the screen test in ASC 805-10-55-5A related to substantially all of the fair value being concentrated in a single asset or group of assets (i.e., the fiber infrastructure assets) and, thus, the assets are not considered a business. The acquisition of Paniolo’s assets will augment the Company’s existing backbone network and increase the Company’s total submarine and terrestrial fiber footprint by more than 400 miles. The aggregate purchase price to be paid upon closing of the Paniolo acquisition will be $50.0 million, consisting of $25.0 million in cash and $25.0 million in committed purchase money financing. As of December 31, 2020, the Company has funded $5.0 million to an escrow account to fund a portion of the purchase price, and has entered into an agreement with Paniolo to maintain the Paniolo network prior to the close of the acquisition. This escrow amount is classified as restricted cash and recorded in “Other noncurrent assets” on the Condensed Consolidated Balance Sheets. The transaction which is subject to customary closing conditions, including approval of the bankruptcy court and federal regulatory authorities, is expected to close in the second half of 2021.

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Common Share	5. Earnings Per Common Share Basic earnings per common share ("EPS") is based upon the weighted-average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that would occur upon issuance of common shares for awards under stock-based compensation plans, or conversion of preferred stock, but only to the extent that they are considered dilutive. The following table shows the computation of basic and diluted EPS: Year Ended December 31, (in millions, except per share amounts) 2020 2019 2018 Numerator: Net loss $ (55.6 ) $ (66.6 ) $ (69.8 ) Preferred stock dividends 10.4 10.4 10.4 Net loss applicable to common shareowners - basic and diluted $ (66.0 ) $ (77.0 ) $ (80.2 ) Denominator: Weighted-average common shares outstanding - basic 50.6 50.4 46.3 Stock-based compensation arrangements — — — Weighted-average common shares outstanding - diluted 50.6 50.4 46.3 Basic and diluted net loss per common share $ (1.30 ) $ (1.53 ) $ (1.73 ) In conjunction with the acquisition of Hawaiian Telcom in the third quarter of 2018, the Company issued 7.7 million Common Shares as a part of the acquisition consideration. In addition, the Company granted 0.1 million time-based restricted stock units to certain Hawaiian Telcom employees under the Hawaiian Telcom 2010 Equity Incentive Plan. For the years ended December 31, 2020, 2019 and 2018, the Company had a net loss available to common shareholders and, as a result, all common stock equivalents were excluded from the computation of diluted EPS as their inclusion would have been anti-dilutive. For all periods presented, preferred stock convertible into 0.9 million common shares was excluded as it was anti-dilutive.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2020
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	6. Property, Plant and Equipment Property, plant and equipment is comprised of the following: December 31, Depreciable (dollars in millions) 2020 2019 Lives (Years) Land and rights-of-way $ 115.7 $ 117.2 20 – Indefinite Buildings and leasehold improvements 323.8 315.4 5 – 40 Network equipment 4,180.0 4,044.6 2 – 50 Office software, furniture, fixtures and vehicles 243.7 229.3 2 – 14 Construction in process 60.4 38.9 n/a Gross value 4,923.6 4,745.4 Accumulated depreciation (3,194.5 ) (2,964.6 ) Property, plant and equipment, net $ 1,729.1 $ 1,780.8 Depreciation expense on property, plant and equipment, including assets accounted for as finance leases, totaled $279.0 million in 2020, $290.2 million in 2019 and $239.6 million in 2018. The portion of depreciation expense associated with cost of providing services was 86%, 87% and 85% in 2020, 2019 and 2018, respectively. There are numerous assets included within network equipment resulting in a range of depreciable lives between 2 and 50 years, the majority of which fall within the range of 7 to 25 years. No asset impairment losses were recognized in 2020, 2019 or 2018 on property, plant and equipment.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	7. Goodwill and Intangible Assets Goodwill The changes in the Company's goodwill consisted of the following: IT Services and Hardware Entertainment and Communications Total Company December 31, December 31, December 31, December 31, December 31, December 31, (dollars in millions) 2020 2019 2020 2019 2020 2019 Goodwill, beginning balance $ 148.1 $ 146.0 $ 12.4 $ 11.0 $ 160.5 $ 157.0 Activity during the year Adjustments to prior year acquisitions — — — 1.4 — 1.4 Currency translations 1.0 2.1 — — 1.0 2.1 Goodwill, ending balance $ 149.1 $ 148.1 $ 12.4 $ 12.4 $ 161.5 $ 160.5 During 2019, the Company recorded immaterial measurement period adjustments for Hawaiian Telcom. For further information related to the acquisition, see Note 4. No impairment losses were recognized in goodwill for the years ended December 31, 2020, 2019 and 2018. During the annual review performed in the fourth quarter of 2020, we completed a Step 0 or Qualitative assessment and determined it was more likely than not that the fair value of our reporting units exceeded their carrying amounts, including goodwill and, therefore, goodwill was not impaired. Intangible Assets The Company’s intangible assets consisted of the following: December 31, 2020 December 31, 2019 Gross Gross Carrying Accumulated Net Carrying Accumulated Net (dollars in millions) Amount Amortization Amount Amount Amortization Amount Intangible assets subject to amortization Customer relationships $ 141.6 $ (38.9 ) $ 102.7 $ 140.8 $ (28.4 ) $ 112.4 Trade names 41.7 (9.4 ) 32.3 41.3 (6.0 ) 35.3 Technology 9.9 (3.2 ) 6.7 9.9 (2.2 ) 7.7 Total 193.2 (51.5 ) 141.7 192.0 (36.6 ) 155.4 Intangible assets not subject to amortization FCC licenses and spectrum usage rights 6.4 — 6.4 — — — Total intangible assets $ 199.6 $ (51.5 ) $ 148.1 $ 192.0 $ (36.6 ) $ 155.4 During the third quarter of 2020, the Company participated in Auction 105 conducted by the FCC for Priority Access Licenses of the Citizens Band Radio Service Spectrum (“CBRS”). The Company was the winning bidder of 56 wireless spectrum licenses in 17 Greater Cincinnati, Dayton and Hawaiian counties that allow the Company to further expand broadband coverage across its operating footprint. The licenses were transferred to the Company in the fourth quarter of 2020. The Company’s finite-lived intangible assets were established in connection with completed acquisitions. They are amortized over their useful lives based on a number of assumptions including the estimated period of economic benefit and utilization. The change in gross carrying amounts for finite-lived intangible assets is due to foreign currency translation on finite-lived intangible assets denominated in foreign currency. The amortization expense for finite-lived intangible assets was $14.4 million, $14.7 million and $12.4 million in 2020, 2019 and 2018, respectively. No impairment losses were recognized on intangible assets for the years ended December 31, 2020, 2019 and 2018. The estimated useful lives for each finite-lived intangible asset class are as follows: Customer relationships 8 to 15 years Trade names 10 to 15 years Technology 10 years The annual estimated amortization expense for future years is as follows: (dollars in millions) Year ended December 31, 2021 $ 14.3 2022 14.1 2023 13.7 2024 13.5 2025 13.3 Thereafter 72.8 Total $ 141.7

Debt and Other Financing Arrang

Debt and Other Financing Arrangements	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Debt and Other Financing Arrangements	8. Debt and Other Financing Arrangements The Company’s debt consists of the following: December 31, (dollars in millions) 2020 2019 Current portion of long-term debt: Credit Agreement - Tranche B Term Loan due 2024 $ 6.0 $ 6.0 Other financing arrangements 1.9 2.0 Finance lease liabilities 13.9 14.3 Current portion of long-term debt 21.8 22.3 Long-term debt, less current portion: Receivables Facility 182.0 131.5 Credit Agreement - Revolving Credit Facility 67.0 57.0 Credit Agreement - Tranche B Term Loan due 2024 580.5 586.5 7 1/4% 22.3 22.3 7% Senior Notes due 2024 625.0 625.0 8% Senior Notes due 2025 350.0 350.0 Various Cincinnati Bell Telephone notes 87.9 87.9 Other financing arrangements 0.9 3.2 Finance lease liabilities 52.1 59.5 1,967.7 1,922.9 Net unamortized premium 1.1 1.3 Unamortized note issuance costs (18.9 ) (22.9 ) Long-term debt, less current portion 1,949.9 1,901.3 Total debt $ 1,971.7 $ 1,923.6 Credit Agreement In the fourth quarter of 2017, the Company entered into a new Credit Agreement (the "Credit Agreement") and terminated the existing Corporate Credit Agreement. The Credit Agreement provides for (i) a five-year seven-year Borrowings under the Credit Agreement bear interest, at the Company's election, at a rate per annum equal to (i) LIBOR plus the applicable margin or (ii) the base rate plus the applicable margin. In the second quarter of 2018, the Company amended the Credit Agreement to reduce the applicable margin on the Revolving Credit Facility and Tranche B Term Loan due 2024. The LIBOR applicable margin for advances under the Revolving Credit Facility and Tranche B Term Loan due 2024 was changed from the previous 3.75% per annum to 3.25% per annum. The base rate applicable margin for advances under the Revolving Credit Facility and Tranche B Term Loan due 2024 was changed from 2.75% per annum to 2.25% per annum. Base rate is the higher of (i) the bank prime rate, (ii) the one-month LIBOR rate plus 1.00% and (iii) the federal funds rate plus 0.5%. In the case of the Tranche B Term Loan due 2024, the LIBOR rate may not fall below 1.00%. In addition, the Company will be required to pay a commitment fee on any unused portion of the Revolving Credit Facility at a rate of 0.50% per annum, or, if the consolidated total leverage ratio of the Company and its restricted subsidiaries is equal to or less than 3.25 to 1.00, 0.375% per annum. The Company will also pay customary letter of credit fees, including a fronting fee equal to 0.125% per annum of the dollar equivalent of the maximum amount available to be drawn under all outstanding letters of credit, as well as customary issuance and administration fees. As a result of the amendment, the Company recorded a loss on extinguishment of debt of $1.3 million in 2018. At December 31, 2020, borrowings under the Credit Agreement's Revolving Credit Facility were $67.0 million, leaving $133.0 million available. The Revolving Credit Facility requires maintenance of a maximum consolidated secured leverage ratio of 3.50 to1.00 and a minimum consolidated interest coverage ratio of 1.50 to 1.00. The Company may voluntarily repay and reborrow outstanding loans under the Revolving Credit Facility at any time without a premium or a penalty, other than customary “breakage” costs with respect to LIBOR revolving loans. In addition, certain of our variable rate debt, including debt under the Credit Agreement and the Receivables Facility, uses LIBOR as one of the benchmarks for establishing the rate of interest and may be hedged with LIBOR-based interest rate derivatives. LIBOR is the subject of recent regulatory guidance and proposals for reform. These reforms and other pressures may cause LIBOR to be replaced with a new benchmark in the future or to perform differently than in the past. Recent announcements suggest that publication of U.S. Dollar LIBOR tenors will continue to be published until June 2023 with the exception of the one week and two month U.S. Dollar LIBOR tenors which will cease publication in December 2021. The consequences of these developments cannot be entirely predicted, but could include an increase in the cost of our variable rate indebtedness. Guarantors and Security Interests, Credit Agreement All existing and future subsidiaries of the Company (other than Cincinnati Bell Funding LLC (and any other similar special purpose receivables financing subsidiary), the Company's joint ventures, subsidiaries prohibited by applicable law from becoming guarantors, unrestricted subsidiaries and foreign subsidiaries) are required to guarantee borrowings under the Credit Agreement. Debt outstanding under the Credit Agreement is secured by perfected first priority pledges of and security interests in (i) substantially all of the equity interests of the Company's U.S. subsidiaries (other than subsidiaries of non-guarantors of the Credit Agreement) and 66% of the equity interests in certain first-tier foreign subsidiaries held by the Company and the guarantors under the Credit Agreement and (ii) certain personal property and intellectual property of the Company and its subsidiaries (other than that of non-guarantors of the Credit Agreement and certain other excluded property). Accounts Receivable Securitization Facility Cincinnati Bell Inc. and certain of its subsidiaries have an accounts receivable securitization facility ("Receivables Facility"). In the second quarter of 2020, the Company executed amendments to its Receivables Facility, which replaced, amended and added certain provisions and definitions to decrease the credit availability, renew the facility, which is subject to renewal every 364 days The amendments also added provisions for a successor to LIBOR in the event LIBOR is no longer applicable and made technical changes to account for the continued integration of the Company’s Hawaiian Telcom and OnX acquisitions into the facility. In addition, a provision was added that the LIBOR rate for the Receivables Facility may not fall below 0.75 %. Interest on the Receivables Facility is based on the LIBOR rate plus 1.2%. The average interest rate on the Receivables Facility was 2.3% in 2020. The Company pays letter of credit fees on letters of credit drawn under the securitization facility and also pays commitment fees on the unused portion of the total facility. Under this agreement, certain U.S. and Canadian subsidiaries, as originators, sell their respective trade receivables on a continuous basis to Cincinnati Bell Funding LLC (“CBF”) or Cincinnati Bell Funding Canada Ltd. ("CBFC"), wholly-owned consolidated subsidiaries of the Company. Although CBF and CBFC are wholly-owned consolidated subsidiaries of the Company, CBF and CBFC are legally separate from the Company and each of the Company’s other subsidiaries. Upon and after the sale or contribution of the accounts receivable to CBF or CBFC, such accounts receivable are legally assets of CBF and CBFC and, as such, are not available to creditors of other subsidiaries or the parent company. The Receivables Facility includes an option for CBF to sell, rather than borrow against, certain receivables on a non-recourse basis. As of December 31, 2020, there was no outstanding balance for accounts receivable sold. The transferors sell their respective trade receivables on a continuous basis to CBF or CBFC. In turn, CBF or CBFC grants, without recourse, a senior undivided interest in the pooled receivables to various purchasers, including commercial paper conduits, in exchange for cash while maintaining a subordinated undivided interest in the form of over-collateralization in the pooled receivables. The transferors have agreed to continue servicing the receivables for CBF and CBFC at market rates; accordingly, no servicing asset or liability has been recorded. For the purposes of consolidated financial reporting, the Receivables Facility is accounted for as secured financing. Because CBF and CBFC have the ability to prepay the Receivables Facility at any time by making a cash payment and effectively repurchasing the receivables transferred pursuant to the facility, the transfers do not qualify for "sale" treatment on a consolidated basis under ASC 860, "Transfers and Servicing." 7 1 4 In 1993, the Company issued $50.0 million of 7 1/4% 1 4 1 4 1 4 1 4 1 4 pari-passu Interest on the 7 1 4 1 4 1 4 7% Senior Notes due 2024 In the third quarter of 2016, the Company issued in a private offering $425.0 million aggregate principal amount of 7% Senior Notes due 2024 ("7% Senior Notes") at par. The Company issued an additional $200.0 million aggregate principal amount of 7% Senior Notes at a price of 105.000% in the fourth quarter of 2016. The 7% Senior Notes were issued pursuant to an indenture, dated as of September 22, 2016 (the “2024 Notes Indenture”), among the Issuer, the subsidiary guarantors and Regions Bank, as trustee (the “Trustee”). Under the 2024 Notes Indenture, the 7% Senior Notes are senior unsecured obligations of the Company, which rank equally in right of payment with all existing and future unsecured senior debt of the Company. The 7% Senior Notes are guaranteed on a joint and several basis by certain of the Company’s existing and future domestic subsidiaries. Each such guarantee is currently a senior unsecured obligation of the applicable guarantor, ranking equally with all existing and future unsecured senior debt of such guarantor and effectively subordinated to all existing and future secured indebtedness of such guarantor to the extent of the value of the assets securing that indebtedness. The 7% Senior Notes bear interest at a rate of 7% per annum, payable semi-annually on January 15 and July 15 of each year, beginning on January 15, 2017, to persons who are registered holders of the 7% Senior Notes on the immediately preceding January 1 and July 1, respectively. The 7% Senior Notes will mature on July 15, 2024. The Company may, at its option, redeem some or all of the 7% Senior Notes at any time at declining redemption prices equal to (i) 103.500% through September 14, 2021, (ii) 101.750% beginning on September 15, 2021 and (iii) 100.000% beginning on September 15, 2022 and thereafter, plus, in each case, accrued and unpaid interest, if any, to the applicable redemption date. The 2024 Notes Indenture contains covenants including but not limited to the following: limitations on dividends to shareowners and other restricted payments; dividend and other payment restrictions affecting the Company’s subsidiaries such that the subsidiaries are generally not permitted to enter into an agreement that would limit their ability to make dividend payments to the parent; issuance of indebtedness; asset dispositions; transactions with affiliates; liens; investments; issuances and sales of capital stock of subsidiaries; and redemption of debt that is junior in right of payment. The 2024 Notes Indenture provides for customary events of default, including a cross-default provision for both nonpayment at final maturity or acceleration due to a default of any other existing debt instrument that equals or exceeds $35 million. In June 2020, the Company solicited consents from the holders of the 7% Senior Notes (the “2024 Notes Consent Solicitation”) to amend the 2024 Notes Indenture to (i) amend the definition of “Change of Control” so that MIP’s acquisition of the Company would not constitute a Change of Control and (ii) add a definition of, and designate certain persons, including MIP and its affiliates and Ares Management Corporation and its affiliates as, “Permitted Holders” of the 7% Senior Notes. On July 2, 2020, the Company received the requisite consents from the holders of the 7% Senior Notes, and accordingly, the Company, together with the subsidiary guarantors, entered into the Sixth Supplemental Indenture with the Trustee to give effect to foregoing amendments effective concurrently with the consummation of the MIP Acquisition. Also as part of the 2024 Notes Consent Solicitation, the Company, the subsidiary guarantors and the Trustee agreed to further amend the 2024 Notes Indenture effective concurrently with the consummation of the MIP Acquisition to: (i) secure the 7% Senior Notes and the related guarantees on a pari-passu basis with the 8% Senior Notes and the senior secured credit facilities (subject to certain exceptions) expected to be entered into in connection with the MIP acquisition , and (ii) add a covenant to the that restricts the Company from redeeming all or part of the applicable series of 7% Senior Notes under Section 3.07 of the prior to September 15, 2021 . These further provisions will only be operative upon consummation of the MIP acquisition and subject to certain other conditions. 8% Senior Notes due 2025 In the fourth quarter of 2017, CB Escrow Corp. (the “Issuer”), an Ohio corporation and wholly owned subsidiary of Cincinnati Bell Inc., closed a private offering of $350 million aggregate principal amount of 8% Senior Notes due 2025 (“8% Senior Notes”) at par. The 8% Senior Notes were issued pursuant to an indenture, dated as of October 6, 2017 (the “2025 Notes Indenture”), between the Issuer and Regions Bank, as trustee. At the closing of the acquisition of Hawaiian Telcom, the Issuer merged with and into the Company, and the Company assumed the obligations of the Issuer under the 8% Senior Notes and the 2025 Notes Indenture. Under the 2025 Notes Indenture, the 8% Senior Notes are senior unsecured obligations of the Company, which rank equally in right of payment with all existing and future unsecured senior debt of the Company. The 8% Senior Notes are guaranteed on a joint and several basis by certain of the Company’s existing and future domestic subsidiaries. Under the 2025 Notes Indenture, each such guarantee is a senior unsecured obligation of the applicable guarantor, ranking equally with all existing and future unsecured senior debt of such guarantor and effectively subordinated to all existing and future secured indebtedness of such guarantor to the extent of the value of the assets securing that indebtedness. The 8% Senior Notes bear interest at a rate of 8.00% per annum, payable semi-annually on April 15 and October 15 of each year, beginning on April 15, 2018, to persons who are registered holders of the 8% Senior Notes on the immediately preceding April 1 and October 1, respectively. The 8% Senior Notes will mature on October 15, 2025. The Company may, at its option, redeem some or all of the 8% Senior Notes at any time at declining redemption prices equal to (i) 106.000% through October 14, 2021, (ii) 104.000% beginning on October 15, 2021, (iii) 102.000% beginning on October 15, 2022 and (iv) 100.000% beginning on October 15, 2023 and thereafter, plus, in each case, accrued and unpaid interest, if any, to the applicable redemption date. In June 2020, contemporaneously with the 2024 Notes Consent Solicitation, the Company solicited consents from the holders of the 8% Senior Notes (the “2025 Notes Consent Solicitation”) to amend the 2025 Notes Indenture to (i) amend the definition of “Change of Control” so that MIP’s acquisition of the Company would not constitute a Change of Control and (ii) add a definition of, and designate certain persons, including MIP and its affiliates and Ares Management Corporation and its affiliates as, “Permitted Holders” of the 8% Senior Notes. On July 2, 2020, the Company received the requisite consents from the holders of the 8% Senior Notes, and accordingly, the Compan y together with its subsidiary g uarantors entered into the Second Supplemental Indenture with the Trustee to give effect to foregoing amendments effective concurrently with the consummation of the MIP Acquisition. Also as part of the 2025 Notes Consent Solicitation, the Company, the subsidiary g uarantors and the Trustee agreed to further amend the 2025 Notes Indenture effective concurrently with the consummation of the MIP Acquisition to: (i) secure the 8% Senior Notes and the related guarantees on a pari-passu basis with the 7% Senior Notes and the senior secured credit facilities (subject to certain exceptions) expected to be entered into in connection with the MIP acquisition, and (ii) add a covenant to the 2025 Notes Indenture that restricts the Company from redeeming all or part of the applicable series of 8% Senior Notes under Section 3.07 of the 2025 Notes Indenture prior to October 15, 2021. These further provisions will only be operative upon consummation of the MIP acquisition and subject to certain other conditions . Any collateral granted by the Company (but not its subsidiaries) to secure the 8% Senior Notes will also secure the Issuer’s 7.25% Senior Notes due 2023 and any collateral granted by the Company’s subsidiary CBT to secure the 8% Senior Notes will also secure CBT’s 6.30% Senior Notes due 2028, in each case on an equal and ratable basis. Cincinnati Bell Telephone Notes In 1998, CBT's predecessor issued $150.0 million in aggregate principal of 6.30% unsecured senior notes due 2028 (the "CBT Notes"), which are guaranteed on a subordinated basis by the Company but not its subsidiaries. The indenture related to the CBT Notes does not subject the Company or CBT to restrictive financial covenants, but it does contain a covenant providing that if CBT incurs certain liens on its property or assets, CBT must secure the outstanding CBT Notes equally and ratably with the indebtedness or obligations secured by such liens. In 2017, CBT pledged its assets in support of the Company's debt under the Credit Agreement, and as a result, the CBT Notes became equally and ratably secured with the collateral granted by CBT that secure the debt under the Credit Agreement. The Company expects to enter into new senior secured credit facilities upon the consummation of the MIP acquisition, such that the new senior secured credit facilities will be equally and ratably secured with the collateral granted by CBT to secure the CBT Notes. Additionally, in connection with the 2024 Notes Consent Solicitation and the 2025 Notes Consent Solicitation, the Company has agreed to secure the 7% Senior Notes and the 8% Senior Notes on a pari-passu The maturity date of the CBT notes is in 2028, and the CBT Notes may be redeemed at any time at a redemption price equal to the greater of 100% of the principal amount of the CBT Notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest to maturity, plus accrued interest to the redemption date. The indenture governing the CBT Notes provides for customary events of default, including for failure to make any payment when due and for one or more defaults of any other existing debt instruments of the Company or CBT that exceeds $20.0 million, in the aggregate. Finance Lease Liabilities Finance lease liabilities represent our obligation for certain leased assets, including vehicles and various equipment. These leases generally contain renewal or buyout options. Debt Maturity Schedule The following table summarizes our annual principal maturities of debt and other financing arrangements for the five years subsequent to December 31, 2020, and thereafter: Other financing (dollars in millions) Debt arrangements Year ended December 31, 2021 $ 6.0 $ 1.9 2022 73.0 0.5 2023 210.3 0.4 2024 1,193.5 — 2025 350.0 — Thereafter 87.9 — 1,920.7 2.8 Net unamortized premium 1.1 — Unamortized note issuance costs (18.9 ) — Total debt $ 1,902.9 $ 2.8 Deferred Financing Costs Deferred financing costs are costs incurred in connection with obtaining long-term financing and renewing revolving credit agreements. Deferred financing costs are amortized on the effective interest method. The Company incurred deferred financing costs of $0.4 million and $0.8 million in 2020 and 2019, respectively, related to amending and renewing revolving credit agreements. The Company wrote-off deferred financing costs associated with the extinguishment of debt of $1.3 million in 2018. The Company records costs incurred in connection with obtaining revolving credit agreements as an asset. As of December 31, 2020 and 2019, deferred financing costs recorded to "Other non-current assets" totaled $2.0 million and $3.1 million, respectively. Amortization of deferred financing costs, included in "Interest expense" in the Consolidated Statements of Operations, totaled $5.9 million in 2020, $6.4 million in 2019, and $5.7 million in 2018. Debt Covenants Credit Agreement The Credit Agreement has financial covenants that require the Company to maintain certain leverage and interest coverage ratios. As of December 31, 2020, these ratios and limitations include a maximum secured consolidated total leverage ratio of 3.50 to 1.00 and a minimum consolidated interest coverage ratio of 1.50 to 1.00. In addition, the Credit Agreement contains customary affirmative and negative covenants, including but not limited to, restrictions on Company's ability to incur additional indebtedness, create liens, pay dividends, make certain investments, and prepay other indebtedness, sell, transfer, lease, or dispose of assets and enter into, or undertake, certain liquidations, mergers, consolidations or acquisitions. The Credit Agreement contains customary events of default (which are in some cases subject to certain exceptions, thresholds and grace periods), including, but not limited to, nonpayment of principal or interest, failure to perform or observe covenants, breaches of representations and warranties, cross-defaults with certain other indebtedness, certain bankruptcy-related events or proceedings, final monetary judgments or orders, ERISA defaults, invalidity of loan documents or guarantees, and certain change of control events. If the Company were to violate any of its covenants and were unable to obtain a waiver, it would be considered a default. If the Company were in default under the Credit Agreement, no additional borrowings under this facility would be available until the default was waived or cured. The Tranche B Term Loan due 2024 is subject to the same affirmative and negative covenants and events of default as the Revolving Credit Facility, except that a breach of the financial covenants will not result in an event of default under the Tranche B Term Loan due 2024 unless and until the agent or a majority in interest of the lenders under the Revolving Credit Facility have terminated their commitments under the Revolving Credit Facility and accelerated the loans then outstanding under the Revolving Credit Facility in response to such breach in accordance with the terms and conditions of the Credit Agreement.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases	9. Leases Lessee Disclosures The Company primarily leases real estate for offices, retail stores and central offices, as well as equipment, cell towers and fleet vehicles. The Company leases its real estate for terms between 1 and 55 years, its equipment for terms between 3 and 6 years, its cell towers for terms between 4 and 21 years and its vehicles for terms of 5 years. Our leases have various expiration dates through 2066, some of which include options to extend the leases for up to 15 years. Upon adoption of ASC 842 on January 1, 2019, the Company elected not to recognize leases with terms of one-year or less on the balance sheet. The Company's leases generally do not provide an implicit rate, and therefore the Company uses its incremental borrowing rate as the discount rate when measuring operating lease liabilities. The incremental borrowing rate represents an estimate of the interest rate the Company would incur at lease commencement to borrow an amount equal to the lease payments on a collateralized basis over the term of the lease. Supplemental balance sheet information related to the Company's leases was as follows: December 31, (dollars in millions) Balance Sheet Location 2020 2019 Operating lease assets, net of amortization Operating lease right-of-use assets $ 37.4 $ 35.8 Finance lease assets, net of amortization Property, plant and equipment, net 28.0 33.2 Operating lease liabilities: Current operating lease liabilities Other current liabilities 9.6 10.9 Noncurrent operating lease liabilities Operating lease liabilities 33.6 32.1 Total operating lease liabilities 43.2 43.0 Finance lease liabilities: Current finance lease liabilities Current portion of long-term debt 13.9 14.3 Noncurrent finance lease liabilities Long-term debt, less current portion 52.1 59.5 Total finance lease liabilities $ 66.0 $ 73.8 The components of lease expense were as follows: Year Ended December 31, (dollars in millions) 2020 2019 Operating lease cost $ 13.0 $ 13.2 Short-term lease cost 0.3 0.3 Variable lease cost 2.6 2.1 Finance lease cost: Depreciation on leased assets 7.0 8.3 Interest on lease liabilities 4.5 5.1 Total lease cost $ 27.4 $ 29.0 Under ASC 840, the Company recorded lease expense of $18.4 million in 2018. Other information related to leases was as follows: Year Ended December 31, (dollars in millions) 2020 2019 Supplemental Cash Flows Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 4.4 $ 5.1 Operating cash flows from operating leases $ 12.1 $ 11.0 Financing cash flows from finance leases $ 16.6 $ 14.4 Right-of-use assets obtained in exchange for lease obligations: New operating leases $ 12.6 $ 7.5 New finance leases $ 7.7 $ 14.5 Weighted Average Remaining Lease Term Operating leases 7.35 years 7.93 years Finance leases 6.88 years 7.20 years Weighted Average Discount Rate Operating leases 5.42 % 6.94 % Finance leases 7.08 % 7.00 % Future minimum lease payments under non-cancellable leases as of December 31, 2020 are as follows: (dollars in millions) Operating Leases Finance Leases Year ended December 31, 2021 $ 11.7 $ 17.5 2022 8.7 12.7 2023 7.3 9.2 2024 5.5 8.4 2025 4.3 7.4 Thereafter 17.2 29.5 Total future minimum lease payments 54.7 84.7 Less imputed interest (10.4 ) (18.7 ) Total $ 44.3 $ 66.0 As of December 31, 2020, we have an additional operating lease for a building that has not yet commenced for $1.1 million. This operating lease will commence on January 1, 2021 with a lease term of 10 years. Sale-Leaseback Disclosures On December 31, 2020, the Company, through its subsidiary Hawaiian Telcom, sold its real property in Wailuku, Hawaii to the County of Maui for $3.7 million. Net proceeds received from the transaction were approximately $3.5 million after transactional costs. Concurrently with the sale, the Company entered into an operating lease arrangement with the County of Maui for a portion of the building to maintain use of the location as a central office switching station. The transaction qualified for sale-leaseback accounting in accordance with ASC 842, Lessor Disclosures The Company has operating leases related to its dark fiber arrangements for terms between 1 and 30 years. Our leases have various expiration dates through 2048, some of which include options to extend the lease. The Company recorded $2.9 million and $3.1 million in lease income related to operating lease payments in 2020 and 2019, respectively. The Company owns the underlying assets associated with its operating leases and records them in "Property, plant and equipment, net" on the Consolidated Balance Sheets. Future minimum lease payments to be received under non-cancellable leases as of December 31, 2020 are as follows: (dollars in millions) Operating Leases Year ended December 31, 2021 $ 2.4 2022 1.9 2023 1.8 2024 1.8 2025 1.7 Thereafter 15.4 Total future minimum lease payments 25.0 Less imputed interest (8.8 ) Total $ 16.2

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	10. Commitments and Contingencies Other Installment Financing Arrangements Prior to the acquisition of Hawaiian Telcom in July 2018, Hawaiian Telcom had an open dispute related to jointly-owned utility poles. Each of the electric utilities for the four counties in the State of Hawaii had separate agreements with Hawaiian Telcom for the joint ownership and maintenance of utility poles along with other third parties, such as the State of Hawaii. The agreements set forth various circumstances requiring pole removal, installation and replacement and the sharing of costs among the joint pole owners. The agreements allowed for the cost of work done by one joint pole owner to be shared by the other joint pole owners based on the apportionment of costs in the agreements. Generally, the electric utilities had maintained, replaced and installed the majority of the jointly-owned poles and had billed the other joint pole owners for their respective share of the costs. Hawaiian Telcom had a disagreement with the common owner of the utilities in three of the counties in Hawaii regarding the amount the utilities were requesting for their share of the capitalized costs. The agreement approved by the Hawaii Public Utilities Commission in October 2018 provided for the transfer of Hawaiian Telcom’s ownership responsibility of the poles to Hawaiian Electric Company (HEC) and Hawaiian Telcom to pay a fixed annual fee to HEC for continued use of the poles. The agreement, referred to as the Pole License Agreement, has a duration of 10 years at a fixed rate with two renewal options each for five year terms. Due to the continuing involvement by the Company, this transaction does not meet the requirements to be accounted for as a sale-leaseback, and therefore it has been treated as a financing obligation. As of December 31, 2020, the Company has a liability recorded of $38.0 million related to the payments for the use of the poles, of which $1.3 million is recognized within "Other current liabilities" in the Consolidated Balance Sheets. As of December 31, 2019, the Company had a liability recorded of $39.1 million related to the payments for the use of the poles, of which $1.1 million is recognized within “Other current liabilities” in the Consolidated Balance Sheets. The IT Services and Hardware segment entered into an agreement in June 2018 for a building to use in its data center operations. Structural improvements were made to the facility in excess of normal tenant improvements and, as such, we are deemed the accounting owner of the facility. The term of the agreement for the building shell is a duration of 10 years with two renewal options each with a two-year The future minimum payments under the base agreements, as well as the renewal options for each lease which the Company expects to exercise, are as follows: (dollars in millions) Year ended December 31, 2021 $ 0.8 2022 3.5 2023 5.8 2024 5.8 2025 5.8 Thereafter 52.0 Total future minimum financing obligation payments 73.7 Less imputed interest (33.5 ) Total $ 40.2 Trans-Pacific Submarine Cable Commensurate to the acquisition of Hawaiian Telcom, the Company gained access to the SEA-US cable. In August 2014, Hawaiian Telcom joined several other telecommunication companies to form a consortium to build and operate the SEA-US cable. The total system cost was $235.0 million and was primarily composed of a supply contract with the lead contractor. The Company has a fractional ownership in the system and recognizes its fractional share at cost. In addition, the Company constructed a cable landing station in Hawaii and provides cable landing services. The system was completed in August 2017. During 2020 and 2019, the Company incurred costs of $0.7 million and $0.4 million, respectively, primarily to the cable contractor for construction, with all such costs capitalized. The Company has excess capacity on its share of the SEA-US cable that it makes available to other carriers for a fee. The Company has contracted and expects to enter into additional IRU agreements with other carriers for use of this excess fiber circuit capacity. The Company may receive up-front payments for services to be delivered over a period of up to 25 years. The Company has a remaining obligation related to the sale of capacity and other services of $20.8 million and $21.3 million at December 31, 2020 and 2019, respectively, recorded in "Other noncurrent liabilities" and $1.3 million and $1.2 million at December 31, 2020 and 2019, respectively, recorded to “Other current liabilities” in the Consolidated Balance Sheets, which was previously received in up-front payments. The Company is recognizing revenue for the cable on a straight-line basis over the contract term. The Company recognizes a financing component in accordance with ASC 606 associated with the upfront payments as the contract terms range up to 25 years. Asset Retirement Obligations Asset retirement obligations exist for certain assets. In conjunction with the acquisition of Hawaiian Telcom, the Company recognized certain asset retirement obligations related to underground tanks and environmental remediation that will occur prior to the retirement of certain assets. These obligations are recorded in "Other noncurrent liabilities" in the Consolidated Balance Sheets. Additionally, the Company recognizes certain asset retirement obligations related to data center leases which are recorded in "Accounts payable" in the Consolidated Balance Sheets. The following table presents the activity for the Company’s asset retirement obligations: December 31, (dollars in millions) 2020 2019 Balance, beginning of period $ 7.1 $ 9.1 Hawaiian Telcom opening balance sheet adjustment — (3.2 ) Liabilities incurred — 1.8 Liabilities settled (0.6 ) (0.7 ) Accretion expense 0.2 0.1 Balance, end of period $ 6.7 $ 7.1 Indemnifications During the normal course of business, the Company makes certain indemnities, commitments, and guarantees under which it may be required to make payments in relation to certain transactions. These include (a) intellectual property indemnities to customers in connection with the use, sale, and/or license of products and services, (b) indemnities to customers in connection with losses incurred while performing services on their premises, (c) indemnities to vendors and service providers pertaining to claims based on negligence or willful misconduct of the Company, (d) indemnities involving the representations and warranties in certain contracts, and (e) outstanding letters of credit which totaled $13.9 million as of December 31, 2020. In addition, the Company has made contractual commitments to several employees providing for payments upon the occurrence of certain prescribed events. The majority of these indemnities, commitments, and guarantees do not provide for any limitation on the maximum potential for future payments that the Company could be obligated to make. As permitted under Ohio law, the Company has agreements whereby the Company indemnifies its officers and directors for certain events or occurrences while the officer or director is, or was, serving at the Company's request in such capacity. The term of the indemnification period is for the lifetime of the officer or director. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited; however, the Company has a director and officer insurance policy that limits the Company's exposure and enables the Company to recover a portion of any future amounts paid. As a result of the Company's insurance policy coverage, the Company believes the estimated fair value of these indemnification agreements is minimal. The Company has no liabilities recorded for these agreements as o f December 31, 2020 or 2019 . Purchase Commitments The Company has purchase commitments and blanket purchase requisitions related to certain goods and services. These agreements typically range from one to three years. As of December 31, 2020 and 2019, the minimum commitments associated with these arrangements that are noncancellable in nature, are not considered significant. The Company generally has the right to cancel open purchase orders prior to delivery and to terminate the contracts without cause. Litigation Cincinnati Bell and its subsidiaries are subject to various lawsuits, actions, proceedings, claims and other matters asserted under laws and regulations in the normal course of business. We believe the liabilities accrued for legal contingencies in our consolidated financial statements, as prescribed by GAAP, are adequate in light of the probable and estimable contingencies. However, there can be no assurances that the actual amounts required to satisfy alleged liabilities from various legal proceedings, claims, tax examinations, and other matters, and to comply with applicable laws and regulations, will not exceed the amounts reflected in our consolidated financial statements. As such, costs, if any, that may be incurred in excess of those amounts provided as of December 31, 2020, cannot be reasonably determined.

Financial Instruments and Fair

Financial Instruments and Fair Value Measurements	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Financial Instruments and Fair Value Measurements	11. Financial Instruments and Fair Value Measurements Interest Rate Swaps The Company uses interest rate swap agreements to minimize its exposure to interest rate fluctuations on variable rate debt borrowings. Interest rate swaps involve the exchange of fixed and variable rate interest payments and do not represent an actual exchange of the underlying notional amounts between parties. In the second quarter of 2018, the Company entered into one forward starting non-amortizing interest rate swap with a notional amount of $300.0 million to convert variable rate debt to fixed rate debt. The interest rate swap became effective in June 2018 and expires in June 2023. The interest rate swap results in interest payments based on an average fixed rate of 2.938% plus the applicable margin per the requirements in the Credit Agreement. In the first quarter of 2019, the Company entered into three forward starting non-amortizing interest rate swaps, with a notional amount of $89.0 million each, to convert variable rate debt to fixed rate debt. The interest rate swaps became effective in March 2019 and expire in March 2024. The interest rate swaps result in interest payments based on an average fixed rate per swap of 2.275%, 2.244% and 2.328% plus the applicable margin per the requirements in the Credit Agreement. During the next twelve months, the Company estimates that $9.3 million will be reclassified as an increase to interest expense. The fair value of the Company's interest rate swaps are impacted by the credit risk of both the Company and its counterparties. The Company has agreements with its derivative financial instrument counterparties that contain provisions providing that if the Company defaults on the indebtedness associated with its derivative financial instruments, then the Company could also be declared in default on its derivative financial instruments obligations. In addition, the Company minimizes nonperformance risk on its derivative instruments by evaluating the creditworthiness of its counterparties, which are limited to major banks and financial institutions. Upon inception, the interest rate swaps were designated as cash flow hedges under ASC 815, with gains and losses, net of tax, measured on an ongoing basis recorded in accumulated other comprehensive loss. The fair value of the interest rate swaps are categorized as Level 2 in the fair value hierarchy as they are based on well-recognized financial principles and available market data. As of December 31, 2020, the fair value of the interest rate swap liability was $25.4 million and is recorded in the Consolidated Balance Sheets as follows: Quoted Prices in Significant Significant Active Observable Unobservable December 31, Markets Inputs Inputs (dollars in millions) Balance Sheet Location 2020 Level 1 Level 2 Level 3 Liabilities: Interest Rate Swap Other current liabilities $ 9.3 $ — $ 9.3 $ — Interest Rate Swap Other noncurrent liabilities $ 16.1 $ — $ 16.1 $ — As of December 31, 2019, the fair value of the interest rate swap liability was $19.0 million and is recorded in the Consolidated Balance Sheets as of December 31, 2019 as follows: Quoted Prices in Significant Significant Active Observable Unobservable December 31, Markets Inputs Inputs (dollars in millions) Balance Sheet Location 2019 Level 1 Level 2 Level 3 Liabilities: Interest Rate Swap Other current liabilities $ 5.7 $ — $ 5.7 $ — Interest Rate Swap Other noncurrent liabilities $ 13.3 $ — $ 13.3 $ — The amount of losses recognized in Accumulated Other Comprehensive Income ("AOCI") net of reclassifications into earnings is as follows: Year Ended December 31, (dollars in millions) 2020 2019 Interest Rate Swap $ (6.4 ) $ (14.0 ) The amount of losses reclassified from AOCI into earnings is as follows: Year Ended December 31, (dollars in millions) Statement of Operations Location 2020 2019 Interest Rate Swap Interest Expense $ (8.4 ) $ (2.2 ) Disclosure on Financial Instruments The carrying values of the Company's financial instruments approximate the estimated fair values as of December 31, 2020 and December 31, 2019, except for the Company's long-term debt and other financing arrangements. The carrying and fair values of these items are as follows: December 31, 2020 December 31, 2019 (dollars in millions) Carrying Value Fair Value Carrying Value Fair Value Long-term debt, including current portion* $ 1,921.8 $ 1,973.4 $ 1,867.5 $ 1,921.5 Other financing arrangements 42.1 58.6 43.5 55.5 * Excludes finance leases, other financing arrangements and note issuance costs The fair value of our long-term debt was based on closing or estimated market prices of the Company’s debt at December 31, 2020 and December 31, 2019, which is considered Level 2 of the fair value hierarchy. The fair value of other financing arrangements was calculated using a discounted cash flow model that incorporates current borrowing rates for obligations of similar duration, which is considered Level 3 of the fair value hierarchy. As of December 31, 2020, the current borrowing rate was estimated by applying the Company's credit spread to the risk-free rate for a similar duration borrowing.

Pension and Postretirement Plan

Pension and Postretirement Plans	12 Months Ended
	Dec. 31, 2020
Compensation And Retirement Disclosure [Abstract]
Pension and Postretirement Plans	12. Pension and Postretirement Plans Savings Plans The Company sponsors several defined contribution plans covering substantially all employees. The Company's contributions to the plans are based on matching a portion of the employee contributions. Both employer and employee contributions are invested in various investment funds at the direction of the employee. Employer contributions to the defined contribution plans were $13.1 million, $12.9 million, and $11.3 million in 2020, 2019, and 2018, respectively. Pension and Postretirement Plans Cincinnati Plans The Company sponsors three noncontributory defined benefit pension plans: one for eligible management employees, one for non-management employees, and one supplemental, nonqualified, unfunded plan for certain former senior executives (collectively the "Cincinnati Plans"). The management pension plan is a cash balance plan in which the pension benefit is determined by a combination of compensation-based credits and annual guaranteed interest credits. The non-management pension plan is also a cash balance plan in which the combination of service and job-classification-based credits and annual interest credits determine the pension benefit. Benefits for the supplemental plan are based on eligible pay, adjusted for age and service upon retirement. We fund both the management and non-management plans in an irrevocable trust through contributions, which are determined using the traditional unit credit cost method. We also use the traditional unit credit cost method for determining pension cost for financial reporting purposes. During 2020, the management pension plan made lump sum payments of $6.0 million resulting in a reduction of the plan benefit obligation of $6.0 million. The Company recorded a pension settlement cost of $2.3 million in 2020 as a result of the lump sum payments to the plan participants exceeding the sum of the service cost and the interest cost component of the net pension cost. The Company also provides healthcare and group life insurance benefits for eligible retirees. We fund healthcare benefits and other group life insurance benefits using Voluntary Employee Benefit Association ("VEBA") trusts. It is our practice to fund amounts as deemed appropriate from time to time. Contributions are subject to Internal Revenue Service ("IRS") limitations developed using the traditional unit credit cost method. The actuarial expense calculation for our postretirement health plan is based on numerous assumptions, estimates, and judgments including healthcare cost trend rates and cost sharing with retirees. Retiree healthcare benefits were phased out as of December 31, 2018 for all employees, with the exception of a small group of grandfathered employees. The postretirement health plan also includes liabilities associated with employees who have special death benefits only. Hawaii Plans The Company sponsors one noncontributory defined benefit plan for union employees, one cash balance pension plan for nonunion employees, and two postretirement health and life insurance plans for Hawaiian Telcom employees (collectively the "Hawaii Plans"). The noncontributory defined benefit plan was frozen as of March 1, 2012, and the cash balance pension plan was frozen as of April 1, 2007. During 2020, Hawaiian Telcom’s pension plans made lump sum payments of $15.1 million resulting in a reduction of plan benefit obligation of $15.1 million. The Company recorded a pension settlement cost of $1.5 million in 2020 as a result of lump sum payments to the plan participants exceeding the sum of the service cost and the interest cost component of the net pension cost. During 2019, Hawaiian Telcom’s pension plans made lump sum payments of $1.0 million resulting in a reduction of plan benefit obligation of $1.0 million and a nominal pension settlement cost. During 2018, Hawaiian Telcom's pension plans made lump sum payments of $3.6 million resulting in a reduction of plan benefit obligation of $3.6 million and a pension settlement cost of $0.1 million. Components of Net Periodic Cost The following information relates to noncontributory defined benefit pension plans, postretirement healthcare plans, and life insurance benefit plans at December 31, 2020, 2019 and 2018 for the Cincinnati Plans and the Hawaii Plans. Hawaii pension and postretirement costs recorded in 2018 are related to the six month period subsequent to the July 2, 2018 acquisition date. In accordance with ASU 2017-07, only the service cost component of net benefit cost is eligible for capitalization, which was immaterial for 2020, 2019 and 2018. Pension and postretirement benefit costs for these plans were comprised of: Pension Benefits Postretirement and Other Benefits (dollars in millions) 2020 2019 2018 2020 2019 2018 Service cost $ — $ — $ — $ 0.4 $ 0.6 $ 0.6 Interest cost on projected benefit obligation 18.8 23.9 20.0 3.7 5.0 4.2 Expected return on plan assets (29.0 ) (30.7 ) (29.8 ) — — — Amortization of: Prior service benefit — — — (2.5 ) (2.5 ) (3.1 ) Actuarial loss 18.1 13.7 17.0 1.2 1.8 4.1 Pension settlement charges 3.8 — 0.1 — — — Pension/postretirement cost $ 11.7 $ 6.9 $ 7.3 $ 2.8 $ 4.9 $ 5.8 The following are the weighted-average assumptions used in measuring the net periodic cost of the pension and postretirement benefits: Cincinnati Plans Pension Benefits Postretirement and Other Benefits 2020 2019 2018 2020 2019 2018 Discount rate 3.10 % 4.20 % 3.60 % 3.20 % 4.30 % 3.60 % Expected long-term rate of return 6.00 % 6.50 % 7.00 % — — — Cash balance interest credit rate 4.00 % 4.00 % 4.00 % — — — Future compensation growth rate — — — — — — Hawaii Plans Pension Benefits Postretirement and Other Benefits 2020 2019 2018 2020 2019 2018 Discount rate 2.80 % 4.20 % 4.10 % 3.30 % 4.40 % 4.20 % Expected long-term rate of return 6.00 % 6.50 % 7.00 % — — — Cash balance interest credit rate 2.00 % 2.20 % 3.10 % — — — Future compensation growth rate — — — — — — The expected long-term rate of return on plan assets, developed using the building block approach, for each of the plans is based on the mix of investments held directly by the plans and the current view of expected future returns, which is influenced by historical averages. Changes in actual asset return experience and discount rate assumptions can impact the Company’s operating results, financial position and cash flows. The Company utilized the Pri-2012/MP-2020 and Pri-2012/MP-2019 mortality tables published by the Society of Actuaries to measure the benefit obligations as of December 31, 2020 and 2019, respectively. Benefit Obligation and Funded Status Changes in the plans' benefit obligations and funded status are as follows: Pension Benefits Postretirement and Other Benefits (dollars in millions) 2020 2019 2020 2019 Change in benefit obligation: Benefit obligation at January 1, $ 652.9 $ 606.8 $ 116.3 $ 123.7 Service cost — — 0.4 0.6 Interest cost 18.8 23.9 3.7 5.0 Actuarial loss (gain) (a) (b) 62.8 72.7 (3.5 ) (5.1 ) Benefits paid (39.3 ) (49.5 ) (7.9 ) (8.6 ) Retiree drug subsidy received — — 0.1 0.1 Settlements (c) (21.1 ) (1.0 ) — — Other — — 0.5 0.6 Benefit obligation at December 31, $ 674.1 $ 652.9 $ 109.6 $ 116.3 Change in plan assets: Fair value of plan assets at January 1, $ 538.8 $ 482.4 $ 4.3 $ 5.8 Actual return on plan assets 84.5 101.0 0.1 0.3 Employer contributions 7.7 5.9 6.5 6.7 Retiree drug subsidy received — — 0.1 0.1 Benefits paid (39.3 ) (49.5 ) (7.9 ) (8.6 ) Settlements (c) (21.1 ) (1.0 ) — — Fair value of plan assets at December 31, 570.6 538.8 3.1 4.3 Unfunded status $ (103.5 ) $ (114.1 ) $ (106.5 ) $ (112.0 ) (a) The actuarial loss recorded during the periods ended December 31, 2020 and 2019 for the pension plans was primarily driven by changes in the discount rate as well as gains or losses to record pension assets to fair value. (b) The actuarial (gain) recorded for the period ending December 31, 2020 for the postretirement plans is primarily due to an updated participation assumption for the Hawaii plans for terminated vested participants as a result of an experience study completed in 2020 partially offset by changes to the discount rate for both plans. The actuarial (gain) recorded for the period ending December 31, 2019 is primarily due to updated participant assumptions for the Hawaii plans partially offset by changes to the discount rate and updated mortality tables. (c) The increase in pension plan settlements in 2020 increased due to participant elections to take lump sum payments upon termination as result of the voluntary severance program offered to employees in both Cincinnati and Hawaii. The extent of the funding exceeded the settlement accounting threshold, and as such in the year ended December 31, 2020, these activities have been categorized as settlements. The following are the weighted-average assumptions used in accounting for and measuring the projected benefit obligations: Cincinnati Plans Pension Benefits Postretirement and Other Benefits December 31, December 31, 2020 2019 2020 2019 Discount rate 2.40 % 3.10 % 2.40 % 3.20 % Cash balance interest credit rate 4.00 % 4.00 % — — Future compensation growth rate — — — — Hawaii Plans Pension Benefits Postretirement and Other Benefits December 31, December 31, 2020 2019 2020 2019 Discount rate 2.30 % 3.10 % 2.60 % 3.30 % Cash balance interest credit rate 1.20 % 2.30 % — — Future compensation growth rate — — — — The assumed healthcare cost trend rate used to measure the postretirement health benefit obligation is shown below: Cincinnati Plans December 31, 2020 2019 Healthcare cost trend 6.5 % 6.5 % Rate to which the cost trend is assumed to decline (ultimate trend rate) 4.5 % 4.5 % Year the rates reach the ultimate trend rate 2025 2024 The projected benefit obligation is recognized in the Consolidated Balance Sheets as follows: Pension Benefits Postretirement and Other Benefits December 31, December 31, (dollars in millions) 2020 2019 2020 2019 Accrued payroll and benefits (current liability) $ 2.1 $ 2.1 $ 8.5 $ 9.5 Pension and postretirement benefit obligations (noncurrent liability) 101.4 112.0 98.0 102.5 Total $ 103.5 $ 114.1 $ 106.5 $ 112.0 Amounts recognized in "Accumulated other comprehensive loss" in the Consolidated Balance Sheets which have not yet been recognized in net pension costs consisted of the following: Pension Benefits Postretirement and Other Benefits December 31, December 31, (dollars in millions) 2020 2019 2020 2019 Prior service (cost) benefit, net of tax of ($0.1), ($0.1), $3.4, $4.0 $ (0.1 ) $ (0.1 ) $ 13.7 $ 15.6 Actuarial loss, net of tax of ($39.0), ($42.4), ($4.3), ($5.4) (136.1 ) (147.5 ) (16.3 ) (20.0 ) Total $ (136.2 ) $ (147.6 ) $ (2.6 ) $ (4.4 ) Amounts recognized in "Accumulated other comprehensive loss" on the Consolidated Statements of Shareowners’ Deficit and the Consolidated Statements of Comprehensive Income are shown below: Pension Benefits Postretirement and Other Benefits (dollars in millions) 2020 2019 2020 2019 Prior service cost recognized: Reclassification adjustments $ — $ — $ (2.5 ) $ (2.5 ) Actuarial (loss) gain recognized: Reclassification adjustments 21.9 13.7 1.2 1.8 Actuarial (loss) gain arising during the period (7.1 ) (2.3 ) 3.6 5.5 Plan Assets, Investment Policies and Strategies Cincinnati and Hawaii Plans The primary investment objective for the trusts holding the assets of the pension and postretirement plans is preservation of capital with a reasonable amount of long-term growth and income without undue exposure to risk. The investment follows a glide path approach toward liability-driven investing that shifts a higher portfolio weighting to fixed income as the plan’s funded status increases. The current target allocations for the pension plan assets are 50% equity securities and 50% investment grade fixed income securities. Equity securities are primarily held in the form of passively managed funds that seek to track the performance of a benchmark index. Equity securities include investments in growth and value common stocks of companies located in the United States, which represents approximately 50% of the equity securities held by the pension plans at December 31, 2020, as well as stock of international companies located in both developed and emerging markets around the world. Fixed income securities primarily include holdings of funds, which generally invest in a variety of intermediate and long-term investment grade corporate bonds from diversified industries and U.S. Treasuries. The postretirement plan assets held by the Cincinnati plan are currently invested in a group insurance contract. The fair values of the pension plan assets at December 31, 2020 and 2019 by asset category are as follows: (dollars in millions) December 31, 2020 Quoted Prices in active markets Level 1 Significant observable inputs Level 2 Significant unobservable inputs Level 3 Mutual funds U.S. equity index funds $ 151.2 $ 151.2 $ — $ — International equity index funds 152.4 152.4 — — Fixed income bond funds 265.0 265.0 — — Fixed income short-term money market funds 2.0 2.0 — — Group insurance contract 3.1 — — — Total $ 573.7 $ 570.6 $ — $ — (dollars in millions) December 31, 2019 Quoted Prices in active markets Level 1 Significant observable inputs Level 2 Significant unobservable inputs Level 3 Mutual funds U.S. equity index funds $ 137.2 $ 137.2 $ — $ — International equity index funds 137.4 137.4 — — Fixed income bond funds 263.7 263.7 — — Fixed income short-term money market funds 0.5 0.5 — — Group insurance contract 4.3 — — — Total $ 543.1 $ 538.8 $ — $ — The fair values of Level 1 investments are based on quoted prices in active markets. The group insurance contract is valued at contract value plus accrued interest and has not been included in the fair value hierarchy, but is included in the totals above. Contributions to our qualified pension plans were $5.5 million in 2020, $3.6 million in 2019, and $9.3 million in 2018. The 2018 contributions include a $5.0 million contribution to the Hawaii Plans that was required by the Public Utilities Commission of the State of Hawaii in order to complete the merger. Contributions to our non-qualified pension plan were $2.2 million in 2020, $2.3 million in 2019, and $2.3 million in 2018. Based on current assumptions, contributions are expected to be approximately $3 million to both the qualified and non-qualified plans in 2021. Management expects to make cash payments of approximately $8 million related to its postretirement health plans in 2021. Estimated Future Benefit Payments The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid over the next ten years: (dollars in millions) Pension Benefits Postretirement and Other Benefits Medicare Subsidy Receipts 2021 $ 55.3 $ 8.7 $ (0.2 ) 2022 54.6 8.2 (0.2 ) 2023 51.0 7.8 (0.1 ) 2024 50.0 7.4 (0.1 ) 2025 49.0 7.0 (0.1 ) Years 2026 - 2030 198.7 30.6 (0.4 )

Shareowners' Deficit

Shareowners' Deficit	12 Months Ended
	Dec. 31, 2020
Shareowners Deficit [Abstract]
Shareowners' Deficit	13. Shareowners’ Deficit Common Shares The par value of the Company’s common shares is $0.01 per share. At December 31, 2020 and 2019, common shares outstanding were 50,680,605 and 50,420,700, respectively. In 2010, the Board of Directors approved a plan for repurchase of up to $150.0 million of the Company's common shares. In 2020, 2019 and 2018, no shares were repurchased or retired under this plan. As of December 31, 2020, the Company had the authority to repurchase $124.4 million of its common stock. On July 2, 2018, the Company completed its acquisition of Hawaiian Telcom. In conjunction with the acquisition, the Company issued 7.7 million common shares as stock consideration, with a total value of $121.2 million. Preferred Shares The Company is authorized to issue 1,357,299 shares of voting preferred stock without par value and 1,000,000 shares of nonvoting preferred stock without par value. The Company issued 155,250 voting shares of 6 3/4% 3 4 3 4 3 4 Accumulated Other Comprehensive Loss Shareowners’ deficit includes an accumulated other comprehensive loss that is comprised of pension and postretirement unrecognized prior service cost and unrecognized actuarial losses, unrealized loss on cash flow hedges arising during the period and foreign currency translation losses. For the years ended December 31, 2020 and 2019, the changes in accumulated other comprehensive loss by component were as follows: (dollars in millions) Unrecognized Net Periodic Pension and Postretirement Benefit Cost Unrealized Loss on Cash Flow Hedges, Net Foreign Currency Translation Loss Total Balance as of December 31, 2018 $ (164.5 ) $ (3.9 ) $ (7.1 ) $ (175.5 ) Remeasurement of benefit obligations 2.5 — — 2.5 Reclassifications, net 10.0 (a) 1.7 (b) — 11.7 Unrealized loss on cash flow hedges arising during the period, net — (12.5 ) (c) — (12.5 ) Foreign currency gain — — 3.7 3.7 Balance as of December 31, 2019 $ (152.0 ) $ (14.7 ) $ (3.4 ) $ (170.1 ) Remeasurement of benefit obligations (2.7 ) — — (2.7 ) Reclassifications, net 15.9 (a) 6.4 (b) — 22.3 Unrealized loss on cash flow hedges arising during the period, net — (11.4 ) (c) — (11.4 ) Foreign currency gain — — 2.2 2.2 Balance as of December 31, 2020 $ (138.8 ) $ (19.7 ) $ (1.2 ) $ (159.7 ) (a ) These reclassifications are included in the other components of net periodic pension and postretirement benefit plans expense and represent amortization of prior service benefit and actuarial loss, net of tax and pension settlement charges, net of tax. The other components of net periodic pension and postretirement benefit plans expense are recorded in "Other components of pension and postretirement benefit plans expense" on the Consolidated Statements of Operations. See Note 12 for further disclosures. (b ) These reclassifications are reported within "Interest expense" on the Consolidated Statements of Operations when the hedged transactions impact earnings. (c ) The unrealized loss on cash flow hedges represents the change in the fair value of the derivative instruments that occurred during the period, net of tax. The unrealized loss on cash flow hedges is recorded in "Other current liabilities" and "Other noncurrent liabilities" on the Consolidated Balance Sheets. See Note 11 for further disclosures.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	14. Income Taxes Income tax expense for continuing operations consisted of the following: Year Ended December 31, (dollars in millions) 2020 2019 2018 Current: Federal $ (1.4 ) $ (1.4 ) $ (0.6 ) State and local 0.6 — 0.9 Foreign 3.5 0.5 1.6 Total current 2.7 (0.9 ) 1.9 Deferred: Federal (13.8 ) (9.1 ) (10.3 ) State and local 7.7 (1.5 ) 5.7 Foreign (1.3 ) 0.4 (1.0 ) Total deferred (7.4 ) (10.2 ) (5.6 ) Valuation allowance (20.8 ) 0.5 13.1 Total $ (25.5 ) $ (10.6 ) $ 9.4 The following is a reconciliation of the statutory federal income tax rate with the effective tax rate for each year: Year Ended December 31, 2020 2019 2018 U.S. federal statutory rate 21.0 % 21.0 % 21.0 % State and local income taxes, net of federal income tax 1.4 2.1 1.4 Transaction costs (8.6 ) (3.0 ) (3.1 ) Non-Deductible meals and entertainment (0.4 ) (1.5 ) (1.8 ) Equity compensation — (1.7 ) 0.3 Merger adjustments — (1.7 ) — State net operating loss adjustments (9.5 ) (1.0 ) (10.1 ) Change in valuation allowance, net of federal income tax 25.7 (0.5 ) (21.8 ) Change in uncertain tax positions 2.5 — — Other differences, net (0.6 ) — (1.4 ) Effective tax rate 31.5 % 13.7 % (15.5 )% The income tax (benefit) provision was charged to continuing operations or accumulated other comprehensive income (loss) as follows: Year Ended December 31, (dollars in millions) 2020 2019 2018 Income tax (benefit) provision related to: Continuing operations $ (25.5 ) $ (10.6 ) $ 9.4 Accumulated other comprehensive income 2.4 0.2 1.3 The components of our deferred tax assets and liabilities were as follows: December 31, (dollars in millions) 2020 2019 Deferred tax assets: Net operating loss carryforwards $ 239.9 $ 210.2 Finance and operating lease obligations 19.7 29.1 Pension and postretirement benefits 50.4 54.3 Employee benefits 9.1 6.1 Interest limitation — 16.6 State tax credit 9.0 9.2 Other 31.4 29.0 Total deferred tax assets 359.5 354.5 Valuation allowance (28.4 ) (49.3 ) Total deferred tax assets, net of valuation allowance $ 331.1 $ 305.2 Deferred tax liabilities: Property, plant and equipment and intangibles $ (250.9 ) $ (239.2 ) Other (8.6 ) (18.4 ) Total deferred tax liabilities (259.5 ) (257.6 ) Net deferred tax assets $ 71.6 $ 47.6 As of December 31, 2020, the Company had $940.4 million of federal net operating loss carryforwards with a deferred tax asset value of $197.5 million and $42.4 million in deferred tax assets related to state and local net operating loss carryforwards. Federal net operating loss carryforwards of $125.6 million will expire in 2023, if unused. U.S. tax laws limit the annual utilization of net operating loss carryforwards of acquired entities but the Company expects to fully utilize the net operating loss carryforwards. The Company assessed all available positive and negative evidence to determine whether it expects that sufficient future taxable income will be generated to allow it to realize its existing deferred tax assets. Despite the cumulative book loss incurred over the three-year period ended December 31, 2020, there is sufficient objectively verifiable income for management to conclude that it is more likely than not that the Company will utilize available federal net operating loss carryforwards prior to their expiration. In 2020, the CARES Act was enacted, which amended section 163(j) of the Internal Revenue Code to increase the deduction limit for interest expense. As a result of the increased limit, the Company was able to release substantially all of its valuation allowances against deferred tax assets relating to previously-disallowed interest expense, which were $16.6 million as of December 31, 2019. As of December 31, 2020 and 2019, the Company has valuation allowances of $28.4 million and $32.7 million, respectively, recorded against other deferred tax assets consisting primarily of state and local net operating loss carryforwards and state credits. Management has concluded that it is more likely than not that it will realize all other deferred tax assets. The total amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate is $19.0 million and $21.7 million at December 31, 2020 and December 31, 2019, respectively. Accrued interest and penalties on income tax uncertainties were immaterial as of December 31, 2020 and 2019. A reconciliation of the unrecognized tax benefits is as follows: Year Ended December 31, (dollars in millions) 2020 2019 2018 Balance, beginning of year $ 21.9 $ 22.0 $ 22.2 Change in tax positions for the current year (2.2 ) 0.2 — Change in tax positions for prior years (0.5 ) (0.3 ) (0.2 ) Balance, end of year $ 19.2 $ 21.9 $ 22.0 The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction and various foreign, state and local jurisdictions. With a few exceptions, the Company is no longer subject to U.S. federal, state or local examinations for years before 2016. The Company has not recorded deferred income taxes on the undistributed earnings of its foreign subsidiaries because of management’s intent to indefinitely reinvest such earnings. Determination of the amount of any unrecognized deferred income tax liability on temporary differences arising from tax and financial reporting basis differences has not been practicable.

Stock-Based and Deferred Compen

Stock-Based and Deferred Compensation Plans	12 Months Ended
	Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based and Deferred Compensation Plans	15. Stock-Based and Deferred Compensation Plans The Company may grant stock options, stock appreciation rights, performance-based awards, restricted stock units, and time-based restricted shares to officers and key employees under the 2017 Long-Term Incentive Plan and stock options, restricted shares, and restricted stock units to directors under the 2017 Stock Plan for Non-Employee Directors. The maximum number of shares authorized and available for award under the 2017 plans at December 31, 2020 was 1.1 million. On July 2, 2018, the Company completed its acquisition of Hawaiian Telcom. In conjunction with the acquisition, the Company assumed responsibility for the eventual payout of certain stock-based compensation awards that were previously granted to Hawaiian Telcom employees under the Hawaiian Telcom 2010 Equity Incentive Plan. These awards were originally granted by Hawaiian Telcom in the first quarter of 2017 and in the first quarter of 2018, before the merger with Cincinnati Bell was completed. Going forward, all stock-based compensation awards for Hawaiian Telcom employees will be granted under the 2017 Long-Term Incentive Plan. Stock Options and Stock Appreciation Rights Generally, the awards of stock options and stock appreciation rights fully vest three years from grant date and expire ten 2020 2019 2018 (in thousands, except per share amounts) Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Outstanding at January 1, 144 $ 18.35 151 $ 18.29 181 $ 17.10 Exercised — — — — (19 ) 8.68 Forfeited (1 ) 17.05 (7 ) 17.05 (9 ) 17.05 Expired — — — — (2 ) 8.35 Outstanding and exercisable at December 31, 143 $ 18.37 144 $ 18.35 151 $ 18.29 (dollars in millions) Compensation expense for the year $ — $ — $ — Tax benefit related to compensation expense $ — $ — $ — Intrinsic value of awards exercised $ — $ — $ 0.1 Cash received from awards exercised $ — $ — $ 0.2 Grant date fair value of awards vested $ — $ — $ — The following table summarizes our outstanding and exercisable awards at December 31, 2020: Outstanding Exercisable (in thousands, except per share amounts) Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Range of Grant Price $ 17.05 115 $ 17.05 115 $ 17.05 $23.75 to $26.05 28 23.83 28 23.83 Total 143 $ 18.37 143 $ 18.37 As of December 31, 2020, the aggregate intrinsic value for awards outstanding and exercisable was zero. The weighted-average remaining contractual life for awards outstanding and exercisable is approximately three years. As of December 31, 2020, there was no remaining unrecognized stock compensation expense related to stock options or stock appreciation rights. Performance-Based Restricted Awards Awards granted generally vest over three years and upon the achievement of certain performance-based objectives. Performance-based awards are expensed based on their grant date fair value if it is probable that the performance conditions will be achieved. The following table summarizes our outstanding performance-based restricted award activity: 2020 2019 2018 (in thousands, except per share amounts) Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Non-vested at January 1, 1,282 $ 13.00 692 $ 18.67 871 $ 17.30 Granted* — — 763 8.34 288 17.60 Vested (245 ) 22.03 (160 ) 15.45 (308 ) 15.45 Forfeited — — (13 ) 11.32 (159 ) 15.45 Non-vested at December 31, 1,037 $ 10.87 1,282 $ 13.00 692 $ 18.67 (dollars in millions) Compensation expense for the year $ 2.4 $ 2.7 $ 2.1 Tax benefit related to compensation expense $ (0.5 ) $ (0.6 ) $ (0.5 ) Grant date fair value of awards vested $ 5.4 $ 2.5 $ 4.7 * Assumes the maximum number of awards that can be earned if the performance conditions are achieved. As of December 31, 2020, unrecognized compensation expense related to performance-based awards was $2.2 million, assuming maximum performance attainment, which is expected to be recognized over a weighted-average period of approximately one year. Time-Based Restricted Awards Awards granted to Cincinnati Bell employees in 2019 and 2018 vest at the end of a three year period. Awards granted to directors in 2020, 2019 and 2018 vest on the first anniversary of the grant date. As part of the terms of the acquisition of Hawaiian Telcom, certain stock-based compensation awards granted by Hawaiian Telcom before the merger date were converted to time-based restricted stock units. The Company assumed responsibility for the eventual payout of these time-based restricted stock units as part of the acquisition. These awards were originally granted by Hawaiian Telcom in the first quarter of 2017 and 2018, and vest in one-fourth increments over a period of four years. One-fourth of the awards granted in the first quarter of 2017 vested and were distributed by Hawaiian Telcom prior to July 2, 2018. All remaining awards that vest after July 2, 2018 will be distributed by Cincinnati Bell Inc. The following table summarizes our time-based restricted award activity: 2020 2019 2018 (in thousands, except per share amounts) Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Non-vested at January 1, 942 $ 11.67 497 $ 17.02 164 $ 18.57 Granted 68 14.99 625 8.43 245 17.05 Awards converted pursuant to Hawaiian Telcom acquisition — — — — 149 15.70 Vested (216 ) 13.58 (167 ) 15.39 (61 ) 18.08 Forfeited (2 ) 15.70 (13 ) 12.76 — — Non-vested at December 31, 792 $ 11.42 942 $ 11.67 497 $ 17.02 (dollars in millions) Compensation expense for the year $ 3.2 $ 4.7 $ 3.5 Tax benefit related to compensation expense $ (0.7 ) $ (1.1 ) $ (0.8 ) Grant date fair value of awards vested $ 2.9 $ 2.6 $ 1.1 As of December 31, 2020, there was $2.2 million of unrecognized compensation expense related to these restricted stock awards, which is expected to be recognized over a weighted-average period of approximately one year. Cash-Settled Awards For the year ended December 31, 2020, the Company granted officers and key employees cash-settled awards in place of performance-based restricted awards and time-based restricted awards. These cash-settled awards vest at the end of a three year period. Employees generally must be actively employed on the vesting date in order to receive the award payout. No cash-settled awards were issued in 2019 or 2018. The Company granted cash-settled awards of $10.5 million in 2020. For the year ended December 31, 2020, expense incurred for cash-payment awards was $3.2 million and is recorded to “Other noncurrent liabilities” on the Consolidated Balance Sheets. At December 31, 2020, there was $7.3 million remaining unrecognized compensation expense for cash-settled awards, which will be recognized ratably over the remaining two years of the award.

Restructuring and Severance

Restructuring and Severance	12 Months Ended
	Dec. 31, 2020
Restructuring And Related Activities [Abstract]
Restructuring and Severance	16. Restructuring and Severance Liabilities have been established for employee separations, lease abandonment and contract terminations. A summary of activity in the restructuring and severance liability is shown below: (dollars in millions) Employee Separation Lease Abandonment Total Balance as of December 31, 2017 $ 14.4 $ 0.1 $ 14.5 Charges 7.5 0.8 8.3 Hawaiian Telcom opening balance sheet adjustment 3.8 — 3.8 Utilizations (16.2 ) (0.2 ) (16.4 ) Balance as of December 31, 2018 9.5 0.7 10.2 Charges 6.9 — 6.9 Hawaiian Telcom opening balance sheet adjustment 0.1 — 0.1 Utilizations (13.9 ) (0.4 ) (14.3 ) Balance as of December 31, 2019 2.6 0.3 2.9 Charges 16.9 — 16.9 Utilizations (15.0 ) (0.3 ) (15.3 ) Balance as of December 31, 2020 $ 4.5 $ — $ 4.5 Restructuring and severance charges recorded in 2020 in the IT Services and Hardware segment are associated with initiatives to reduce and contain costs. In the first quarter of 2020, the Company finalized a voluntary severance program (“VSP”) in Cincinnati and Hawaii for certain bargained and management employees in an effort to continue to reduce costs associated with our copper field and network operations. As a result, a severance charge of $14.5 million was recorded in the Entertainment and Communications segment. Restructuring and severance charges recorded in 2019 in the Entertainment and Communications segment are related to a severance program for certain management employees as the Company continued its efforts to streamline operations between Cincinnati and Hawaii. Restructuring and severance charges recorded in the IT Services and Hardware segment in 2019 are associated with initiatives to reduce and contain costs as well as headcount reductions as a result of insourcing initiatives by one of our significant customers. In 2018, an opening balance sheet adjustment of $3.8 million was recorded for certain employees who received severance due to the change of control clause within their employment agreements that was triggered at the time of the acquisition of Hawaiian Telcom. Restructuring and severance charges recorded in 2018 are primarily related to a VSP for certain management employees in the Entertainment and Communications segment, as well as Corporate. The VSP that took place in the fourth quarter of 2018 related to the Company's continued efforts to realize synergies that can be achieved due to the acquisition of Hawaiian Telcom. The Company also incurred employee severance costs in 2018 associated with initiatives to reduce costs and recognize future synergies in the IT Services and Hardware segment as a result of the acquisition of, and integration with, OnX. In addition, a restructuring charge associated with lease abandonment of $0.8 million was recorded in the second quarter of 2018 related to an office space that will no longer be utilized. Lease abandonment costs represent future minimum lease obligations, net of expected sublease income, for abandoned facilities. Lease payments on abandoned facilities were completed in the third quarter 2020. A summary of restructuring activity by business segment is presented below: (dollars in millions) Entertainment and Communications IT Services and Hardware Corporate Total Balance as of December 31, 2017 $ 12.3 $ 2.2 $ — $ 14.5 Charges 3.1 4.9 0.3 8.3 Hawaiian Telcom opening balance sheet adjustment 3.8 — — 3.8 Utilizations (10.6 ) (5.8 ) — (16.4 ) Balance as of December 31, 2018 8.6 1.3 0.3 10.2 Charges 4.9 2.0 — 6.9 Hawaiian Telcom opening balance sheet adjustment 0.1 — — 0.1 Utilizations (11.2 ) (2.8 ) (0.3 ) (14.3 ) Balance as of December 31, 2019 2.4 0.5 — 2.9 Charges 14.8 2.0 0.1 16.9 Utilizations (12.8 ) (2.5 ) — (15.3 ) Balance as of December 31, 2020 $ 4.4 $ — $ 0.1 $ 4.5 At December 31, 2020 and 2019, $4.5 million and $2.9 million, respectively, of the restructuring liabilities were included in “Other current liabilities.”

Business Segment Information

Business Segment Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Business Segment Information	17. Business Segment Information For the years ended December 31, 2020, 2019, and 2018, we operated two business segments: Entertainment and Communications and IT Services and Hardware. Effective January 1, 2019, we adopted the requirement of ASU 2016-02, Leases. The standard was adopted using the modified retrospective transition method, which did not require the Company to adjust comparative period amounts. In July 2018, the Company acquired Hawaiian Telcom. Based on the nature of the products and services offered, financial results are presented in either the Entertainment and Communications segment or the IT Services and Hardware segment. The Entertainment and Communications segment provides products and services that can be categorized as either Fioptics in Cincinnati or Consumer/SMB Fiber in Hawaii (collectively, "Consumer/SMB Fiber"), Enterprise Fiber or Legacy. Cincinnati Bell Telephone Company LLC ("CBT"), a subsidiary of the Company, is the incumbent local exchange carrier ("ILEC") for a geography that covers a radius of approximately 25 miles around Cincinnati, Ohio, and includes parts of northern Kentucky and southeastern Indiana. Voice and data services in the Enterprise Fiber and Legacy categories that are delivered beyond the Company's ILEC territory, particularly in Dayton and Mason, Ohio, are provided through the operations of Cincinnati Bell Extended Territories LLC ("CBET"), a subsidiary of CBT. On July 2, 2018, the Company acquired Hawaiian Telcom. Hawaiian Telcom is the ILEC for the State of Hawaii and the largest full service provider of communications services and products in the state. Capital expenditures in the Entertainment and Communications segment are incurred to expand our Consumer/SMB Fiber product suite, upgrade and increase capacity for our internet and data networks, and to maintain our wireline network. The IT Services and Hardware segment provides end-to-end solutions from consulting to implementation to ongoing optimization to customers in the U.S., Canada and the U.K. These solutions include Cloud, Communications and Consulting services along with the sale and maintenance of major branded hardware reported as Infrastructure Solutions. In July 2018, the Company completed the acquisition of Hawaiian Telcom, and products such as UCaaS, hardware and enterprise long distance delivered by Hawaiian Telcom are included in the IT Services and Hardware segment. Total assets for the Company increased $14.8 million as of December 31, 2020 as compared to December 31, 2019. Entertainment and Communications assets decreased $36.7 million due to a decrease in property, plant and equipment primarily as a result of depreciation exceeding capital expenditures. IT Services and Hardware assets decreased by $23.5 million primarily due to amortization of intangible assets during the twelve months ended December 31, 2020 as well as higher inventory on hand associated with customer sales at December 31, 2019. Corporate assets increased $75.0 million primarily due to increased receivables. The increase in receivables is due to $44.7 million of accounts receivables sold on the Receivables Facility as of December 31, 2019, and no outstanding balance of accounts receivables sold as of December 31, 2020, as well as deterioration in the aging of receivables in 2020 due to COVID-19. Our business segment information is as follows: Year Ended December 31, (dollars in millions) 2020 2019 2018 Revenue Entertainment and Communications $ 969.6 $ 995.7 $ 853.4 IT Services and Hardware 616.6 567.4 550.9 Intersegment (26.4 ) (26.4 ) (26.1 ) Total revenue $ 1,559.8 $ 1,536.7 $ 1,378.2 Intersegment revenue Entertainment and Communications $ 19.7 $ 21.6 $ 22.3 IT Services and Hardware 6.7 4.8 3.8 Total intersegment revenue $ 26.4 $ 26.4 $ 26.1 Operating income Entertainment and Communications $ 99.7 $ 105.5 $ 103.3 IT Services and Hardware 24.6 2.6 17.2 Corporate (58.3 ) (35.0 ) (37.2 ) Total operating income $ 66.0 $ 73.1 $ 83.3 Expenditures for long-lived assets* Entertainment and Communications $ 206.4 $ 201.3 $ 408.0 IT Services and Hardware 23.5 22.4 29.2 Corporate 0.1 0.1 0.2 Total expenditures for long-lived assets $ 230.0 $ 223.8 $ 437.4 Depreciation and amortization Entertainment and Communications $ 252.7 $ 255.8 $ 210.8 IT Services and Hardware 40.6 48.9 41.0 Corporate 0.1 0.2 0.2 Total depreciation and amortization $ 293.4 $ 304.9 $ 252.0 *Includes cost of acquisitions and purchase of wireless spectrum assets As of December 31, (dollars in millions) 2020 2019 Assets Entertainment and Communications $ 1,803.3 $ 1,840.0 IT Services and Hardware 477.2 500.7 Corporate and eliminations 388.1 313.1 Total assets $ 2,668.6 $ 2,653.8

Quarterly Financial Information

Quarterly Financial Information (Unaudited)	12 Months Ended
	Dec. 31, 2020
Selected Quarterly Financial Information [Abstract]
Quarterly Financial Information (Unaudited)	18. Quarterly Financial Information (Unaudited) 2020 First Second Third Fourth (in millions, except per common share amounts) Quarter Quarter Quarter Quarter Total Revenue $ 380.0 $ 380.0 $ 389.5 $ 410.3 $ 1,559.8 Operating (loss) income (20.2 ) 27.7 24.7 33.8 66.0 Net loss (34.0 ) (7.8 ) (8.2 ) (5.6 ) (55.6 ) Basic and diluted loss per common share $ (0.72 ) $ (0.21 ) $ (0.21 ) $ (0.16 ) $ (1.30 ) 2019 First Second Third Fourth (in millions, except per common share amounts) Quarter Quarter Quarter Quarter Total Revenue $ 379.6 $ 384.2 $ 382.5 $ 390.4 $ 1,536.7 Operating income 10.1 24.9 22.8 15.3 73.1 Net loss (26.9 ) (5.5 ) (13.6 ) (20.6 ) (66.6 ) Basic and diluted loss per common share $ (0.59 ) $ (0.16 ) $ (0.32 ) $ (0.46 ) $ (1.53 ) The effects of assumed common share conversions are determined independently for each respective quarter and year and may not be dilutive during every period due to variations in operating results. Therefore, the sum of quarterly per share results will not necessarily equal the per share results for the full year. Restructuring and employee severance charges totaled $15.2 million, $0.4 million, $0.8 million and $0.5 million in the first, second, third and fourth quarters of 2020, respectively. Restructuring and employee severance charges totaled $3.3 million, $1.8 million, $1.3 million, and $0.5 million in the first, second, third and fourth quarters of 2019, respectively. Transaction and integration costs totaled $29.1 million, $2.5 million, $2.2 million and $1.2 million in the first, second, third and fourth quarters of 2020, respectively. These costs were primarily related to the pending acquisition by MIP entered into in the first quarter of 2020. Interest expense totaled $134.2 million in 2020 compared to $139.6 million in 2019. This decrease is due to the decrease in LIBOR rates.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2020
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	19. Supplemental Cash Flow Information Year Ended December 31, (dollars in millions) 2020 2019 2018 Capitalized interest expense $ 1.3 $ 1.7 $ 1.0 Cash paid/(received) for: Interest 125.5 129.3 131.7 Income taxes, net of refunds 0.5 0.5 (13.8 ) Noncash investing and financing activities: Stock consideration for acquisition of Hawaiian Telcom — — 121.2 Acquisition of property by assuming debt and other financing arrangements 7.7 14.5 51.5 Acquisition of property on account 24.3 26.0 35.8

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2020
Schedule Of Valuation And Qualifying Accounts Disclosure [Abstract]
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	VALUATION AND QUALIFYING ACCOUNTS Additions (dollars in millions) Beginning of Period Charge (Benefit) to Expenses (To) From Other Accounts Deductions End of Period Allowance for Doubtful Accounts Year 2020 $ 14.3 $ 14.7 $ — $ 6.0 $ 23.0 Year 2019 $ 13.0 $ 12.5 $ — $ 11.2 $ 14.3 Year 2018 $ 10.4 $ 8.4 $ — $ 5.8 $ 13.0 Deferred Tax Valuation Allowance Year 2020 $ 49.3 $ (20.8 ) $ (0.1 ) $ — $ 28.4 Year 2019 $ 48.7 $ 0.5 $ 0.1 $ — $ 49.3 Year 2018 $ 36.1 $ 13.1 $ (0.5 ) $ — $ 48.7

Description of Business and A_2

Description of Business and Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation — The consolidated financial statements of the Company have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC") and, in the opinion of management, include all adjustments necessary for a fair presentation of the results of operations, comprehensive income, financial position and cash flows for each period presented.
Basis of Consolidation	Basis of Consolidation — The consolidated financial statements include the consolidated accounts of Cincinnati Bell Inc. and its majority-owned subsidiaries over which it exercises control. Intercompany accounts and transactions have been eliminated in the consolidated financial statements.
Use of Estimates	Use of Estimates — The preparation of financial statements in conformity with generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect the amounts reported. Actual results could differ from those estimates. Significant items subject to such estimates and judgments include: the carrying value of property, plant and equipment; the valuation of allowances for receivables and deferred income taxes; reserves recorded for income tax exposures; assets and liabilities related to employee benefits; the valuation of deferred costs under Accounting Standards Codification ("ASC") 606, “Revenue Recognition”; purchase price allocation for acquired businesses; and the valuation of intangible assets and goodwill. In the normal course of business, the Company is also subject to various regulatory and tax proceedings, lawsuits, claims and other matters. The Company believes adequate provision has been made for all such asserted and unasserted claims in accordance with GAAP. Such matters are subject to many uncertainties and outcomes that are not predictable with assurance. We periodically review our estimates in light of changes in circumstances, facts and experience. The effects of material revisions in estimates are reflected in our financial statements prospectively from the date of the change in estimate.
Cash and Cash Equivalents	Cash, Cash Equivalents and Restricted Cash — Cash consists of funds held in bank accounts. Cash equivalents consist of short-term, highly liquid investments with original maturities of three months or less. Restricted cash consists of funds held in an escrow account associated with the pending transaction to acquire substantially all of the operating assets of Paniolo Cable Company, LLC (“Paniolo”). See Note 4 for further information related to this transaction. Restricted cash is included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the Consolidated Statements of Cash Flows. A reconciliation of cash, cash equivalents and restricted cash to the consolidated balance sheet follows: (dollars in millions) December 31, 2020 December 31, 2019 December 31, 2018 Cash and cash equivalents $ 12.2 $ 11.6 $ 15.4 Restricted cash included in Other noncurrent assets 5.0 — — Cash, cash equivalents and restricted cash per Consolidated Statements of Cash Flows $ 17.2 $ 11.6 $ 15.4
Receivables	Receivables — Receivables consist principally of trade receivables from customers and are generally unsecured and due within 21 - 90 days . The Company has receivables with one customer, Verizon Communications Inc., which make up 20 % and 25 % of the outstanding accounts receiva ble balance at December 31, 2020 and 2019 , respectively. Unbilled receivables arise from services rendered but not yet billed. As of December 31, 2020 and 2019 , unbilled receivables totaled $ 41.0 million and $ 15.3 million, respectively. Expected credit losses related to trade receivables are recorded as an allowance for uncollectible accounts in the Consolidated Balance Sheets. The Company establishes the allowances for uncollectible accounts using percentages of aged accounts receivable balances to reflect the historical average of credit losses as well as specific provisions for certain identifiable, potentially uncollectible balances. When internal collection efforts on accounts have been exhausted, the accounts are written off and the associated allowance for un collectible accounts is reduced. In 2020, in response to the pandemic, the Company parti cipated in the Keep America ns C onnected Pledge (“Pledge”), and as a result, we temporarily suspended involuntary account terminations. The Company continued to record allowance for uncollectible accounts but write-offs were delayed until the expiration of the Pledge and past due accounts could pass through the standard collection process. Due to this reduction of write-offs in 2020, the allowance for uncollectible accounts is $ 23.0 million at December 31, 2020 compared to $ 14.3 million at December 31, 2019.
Factoring Arrangements	Factoring Arrangements — In the second quarter of 2018, the Company executed an amendment of its Receivables Facility that includes an option for Cincinnati Bell Funding LLC (“CBF”) to sell certain receivables, on a non-recourse basis, directly to PNC Bank. The terms of the factoring arrangement provides for the factoring of certain receivables, which are purchased at the face amount of the receivable discounted at the annual rate of LIBOR plus a bank determined spread on the purchase date. Such sales of accounts receivable are reflected as a reduction of "Receivables, less allowances" in the Consolidated Balance Sheets as they meet the applicable criteria in ASC 860, "Transfers and Servicing." The fees recorded in relation to such sales of accounts receivable were immaterial in 2020 and $0.7 million in 2019, and are included in "Selling, general, and administrative" in the Consolidated Statements of Operations. As of December 31, 2020, there was no outstanding balance of receivables sold under the terms of the factoring agreement. As of December 31, 2019, the outstanding balance of receivables sold under the terms of the factoring agreement was $44.7 million. See Note 8 for further information related to the Receivables Facility
Inventory, Materials and Supplies	Inventory, Materials and Supplies — Inventory, materials and supplies consists of network components, various telephony and IT equipment to be sold to customers, maintenance inventories, and other materials and supplies, which are carried at the lower of average cost or market.
Property, Plant and Equipment	Property, Plant and Equipment — Property, plant and equipment is stated at original cost and presented net of accumulated depreciation and impairment losses. Property, plant and equipment acquired in conjunction with the acquisition of Hawaiian Telcom was stated at fair value in accordance with ASC 805, “Business Combinations.” Maintenance and repairs are charged to expense as incurred while improvements, which extend an asset's useful life or increase its functionality, are capitalized and depreciated over the asset's remaining life. The majority of the Entertainment and Communications network property, plant and equipment used to generate its voice and data revenue is depreciated using the group method, which develops a depreciation rate annually based on the average useful life of a specific group of assets rather than for each individual asset as would be utilized under the unit method. Provision for depreciation of other property, plant and equipment, except for leasehold improvements, is based on the straight-line method over the estimated economic useful life. Depreciation of leasehold improvements is based on a straight-line method over the lesser of the economic useful life of the asset or the term of the lease, including optional renewal periods if renewal of the lease is reasonably assured. Additions and improvements, including interest and certain labor costs incurred during the construction period, are capitalized. The Company records the fair value of a legal liability for an asset retirement obligation in the period it is incurred. The estimated removal cost is initially capitalized and depreciated over the remaining life of the underlying asset. The associated liability is accreted to its present value each period. Once the obligation is ultimately settled, any difference between the final cost and the recorded liability is recognized as gain or loss on disposition.
Goodwill	Goodwill — Goodwill represents the excess of the purchase price consideration over the fair value of net assets acquired and recorded in connection with business acquisitions. Goodwill is allocated at the business segment level. Goodwill is tested for impairment on an annual basis or when events or changes in circumstances indicate that such assets may be impaired. If the net book value of the reporting unit exceeds its fair value, an impairment loss is recognized. An impairment loss is measured as the excess of the carrying value of goodwill of a reporting unit over its fair value.
Indefinite-Lived Intangible Assets	Indefinite-Lived Intangible Assets — Intangible assets represent purchased assets that lack physical substance but can be separately distinguished from goodwill because of contractual or legal rights, or because the asset is capable of being separately sold or exchanged. Federal Communications Commission ("FCC") licenses for wireless spectrum represent indefinite-lived intangible assets. The Company may renew the wireless licenses in a routine manner every ten years for a nominal fee, provided the Company continues to meet the service and geographic coverage provisions required by the FCC. Intangible assets not subject to amortization are tested for impairment annually, or when events or changes in circumstances indicate that the asset might be impaired. Annual impairment test was not considered necessary in 2020 due to transfer of the licenses occurring in the fourth quarter of 2020.
Long-Lived Assets	Long-Lived Assets — Management reviews the carrying value of property, plant and equipment and other long-lived assets, including intangible assets with definite lives, when events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. An impairment loss is recognized when the estimated future undiscounted cash flows expected to result from the use of an asset (or group of assets) and its eventual disposition is less than its carrying amount. An impairment loss is measured as the amount by which the asset’s carrying value exceeds its estimated fair value. Long-lived intangible assets are amortized based on the estimated economic value generated by the asset in future years.
Cost Method Investments	Cost Method Investments — Certain of our cost method investments do not have readily determinable fair values. The carrying value of these investments was $6.9 million and $6.6 million as of December 31, 2020 and 2019, respectively, and was included in "Other noncurrent assets" in the Consolidated Balance Sheets. Investments are reviewed annually to determine if changes in circumstances exist that would indicate the carrying value may not be recoverable. If indicators are present then an analysis is performed to determine if carrying value exceeds the estimate fair value.
Leases	Leases — The Company adheres to lease accounting principles described in ASC 842, “Leases.” Under ASC 842, the Company determines if an arrangement is a lease at inception based on the facts and circumstances present. In lease transactions where the Company acts as the lessor, the lease component is accounted for in accordance with ASC 842, and the non-lease component is accounted for in accordance with ASC 606. Although separation of lease and non-lease components is required, certain practical expedients are available that release the Company from this requirement. Adoption of the practical expedient allows the Company to account for each lease component and the related non-lease component together as a single component provided that the timing and patterns of revenue recognition for the components are the same and the combined, single unit of account would be classified as an operating lease. The Company's operating leases for certain services that include Customer Premise Equipment, including handsets and set-top boxes, have lease and non-lease components. In these arrangements, management has concluded that the non-lease components are the predominant characteristic, and, as a result, the Company has elected to account for these arrangements as one single non-lease component recorded as "Revenue" in the Consolidated Statements of Operations in accordance with ASC 606. Right-of-use assets represent our right to use an underlying asset for the lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Certain adjustments to the right-of-use asset may be required for items such as initial direct costs paid or incentives received. The Company's lease terms include options to extend, terminate or buyout the lease when it is reasonably certain that we will exercise that option. Leases that have contract prices based on variable factors, such as power usage, are recognized as variable lease expense in the period in which the obligation for those payments are incurred. Lease expense for variable lease payments is recognized on a straight-line basis over the lease term.
Treasury Shares	Treasury Shares — The repurchase of common shares is recorded at purchase cost as treasury shares. Our policy is to retire, either formally or constructively, treasury shares that management anticipates will not be reissued. Upon retirement, the purchase cost of the treasury shares that exceeds par value is recorded as a reduction to “Additional paid-in capital” in the Consolidated Balance Sheets.
Revenue Recognition	Revenue Recognition — The Company adheres to revenue recognition principles described in ASC 606. Under ASC 606, revenue is recognized when the Company transfers promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. A good or service is considered to be transferred when the customer obtains control. Revenue derived from foreign operations is approximately 5%, 5% and 6% of consolidated revenue in 2020, 2019 and 2018, respectively. Entertainment and Communications — Revenues from local telephone, special access, internet product and video services, which are billed monthly prior to performance of service, are not recognized upon billing or cash receipt but rather are deferred until the service is provided. Consumer long distance, switched access and other usage based charges are billed monthly in arrears. Entertainment and Communications bills service revenue in regular monthly cycles, which are spread throughout the days of the month. As the last day of each billing cycle rarely coincides with the end of the reporting period for usage-based services such as long distance and switched access, we must estimate service revenues earned but not yet billed. These estimates are based upon historical usage, and we adjust these estimates during the period in which actual usage is determinable, typically in the following reporting period. Pricing of local voice services is generally subject to oversight by both state and federal regulatory commissions. Such regulation also covers services, competition, and other public policy issues. Various regulatory rulings and interpretations could result in increases or decreases to revenue in future periods. For long-term indefeasible right of use, or IRU, contracts for fiber circuit capacity, the Company may receive up-front payments for services to be delivered for a period of up to 25 years. In these situations, the Company defers the revenue and amortizes it on a straight-line basis to earnings over the term of the contract. See Note 3 for further information. IT Services and Hardware — Revenue is generally recognized as the service is provided. Maintenance on telephony equipment is deferred and recognized ratably over the term of the underlying customer contract, generally one to three years. For hardware sales, revenue is recognized net of the cost of product and is recognized when the hardware is either shipped or delivered in accordance with the terms of the contract. Installation service revenue is generally recognized when installation is complete. We sell equipment and installation services on both a combined and standalone basis. For the sale of hardware within the Infrastructure Solutions category, the Company evaluated whether it is the principal (in which case we report revenues on a gross basis) or the agent (in which case we report revenues on a net basis). The Company has concluded it acts as an agent because it does not control the inventory before it is transferred to customers, it does not have the ability to direct the product to anyone besides the purchasing customer, and it does not integrate the hardware with any of its own goods or services.
Advertising Expenses	Advertising Expenses — Costs related to advertising are expensed as incurred. Advertising costs were $15.6 million, $18.6 million, and $14.2 million in 2020, 2019, and 2018, respectively.
Legal Expenses	Legal Expenses — In the normal course of business, the Company is involved in various claims and legal proceedings. Legal costs incurred in connection with loss contingencies are expensed as incurred. Legal claim accruals are recorded once determined to be both probable and estimable.
Income Taxes	Income taxes — The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction as well as various foreign, state and local jurisdictions. The provision for income taxes is based upon income in the consolidated financial statements, rather than amounts reported on the income tax return. The income tax provision consists of an amount for taxes currently payable and an amount for tax consequences deferred to future periods. Deferred income taxes are provided for temporary differences between financial statement and income tax assets and liabilities. Deferred income taxes are recalculated annually at rates then in effect. Valuation allowances are recorded to reduce deferred tax assets to amounts that are more likely than not to be realized. The ultimate realization of the deferred income tax assets depends upon the ability to generate future taxable income during the periods in which basis differences and other deductions become deductible and prior to the expiration of the net operating loss carryforwards. Previous tax filings are subject to normal reviews by regulatory agencies until the related statute of limitations expires.
Operating Taxes	Operating taxes — Certain operating taxes such as property, sales, use, and gross receipts taxes are reported as expenses in operating income primarily within cost of services. These taxes are not included in income tax expense because the amounts to be paid are not dependent on our level of income. Liabilities for audit exposures are established based on management's assessment of the probability of payment. The provision for such liabilities is recognized as either property, plant and equipment, operating tax expense, or depreciation expense depending on the nature of the audit exposure. Upon resolution of an audit, any remaining liability not paid is released against the account in which it was originally recorded.
Regulatory Taxes	Regulatory taxes — The Company incurs federal and state regulatory taxes on certain revenue producing transactions. We are permitted to recover certain of these taxes by billing the customer; however, collections cannot exceed the amount due to the federal regulatory agency. These federal regulatory taxes are presented in revenue and cost of services on a gross basis because, while the Company is required to pay the tax, it is not required to collect the tax from customers and, in fact, does not collect the tax from customers in certain instances. The amounts recorded as revenue for 2020, 2019 and 2018 were $32.2 million, $29.2 million and $22.2 million, respectively. The amounts reported as expense for 2020, 2019 and 2018 were $34.2 million, $32.5 million, and $23.4 million, respectively. We record all other federal taxes collected from customers on a net basis.
Stock-Based Compensation	Stock-Based Compensation — Compensation cost is recognized for all share-based awards to employees and non-employee directors. We value all share-based awards to employees at fair value on the date of grant and expense this amount over the required service period, generally defined as the applicable vesting period. For awards which contain a performance condition, compensation expense is recognized over the service period, when achievement of the performance condition is deemed probable. The fair value of stock options and stock appreciation rights is determined using the Black-Scholes option-pricing model using assumptions such as volatility, risk-free interest rate, holding period and dividends. The fair value of stock awards is based on the Company’s closing share price on the date of grant. For all share-based payments, the Company accounts for forfeitures as they occur. Actual forfeiture activity reduces the total fair value of the awards to be recognized as compensation expense. When an award is granted to an employee who is retirement eligible, the compensation cost is recognized over the service period up to the date that the employee first becomes eligible to retire.
Pension and Postretirement Benefit Plans	Pension and Postretirement Benefit Plans — The Company maintains qualified and non-qualified defined benefit pension plans, and also provides postretirement healthcare and life insurance benefits for eligible employees. We recognize the overfunded or underfunded status of the defined benefit pension and other postretirement benefit plans as either an asset or liability. Changes in the funded status of these plans are recognized as a component of comprehensive income (loss) in the year they occur. Pension and postretirement healthcare and life insurance benefits earned during the year and interest on the projected benefit obligations are accrued and recognized currently in net periodic benefit cost. Prior service costs and credits are amortized over the average remaining life expectancy of participants or remaining service period, based upon whether plan participants are mostly retirees or active employees. Net gains or losses resulting from differences between actuarial estimates or from changes in actuarial assumptions are recognized as a component of annual net periodic benefit cost. Unrecognized actuarial gains or losses that exceed 10% of the projected benefit obligation are amortized on a straight-line basis over the average remaining service life of active employees for the Cincinnati pension plans (approximately 7 - 11 years ) and Hawaii postretirement plans (approximately 7 - 8 years ), average remaining life expectancy of retirees for the Cincinnati postretirement plan s (approximately 14-15 years ) and average remaining life expectancy of participants for the Hawaii union pension plan (approximately 31 years ) . The accumulated gains or losses associated with the nonunion Hawaii pension plan do not exceed the corridor requiring amortization.
Derivative Financial Instruments	Derivative Financial Instruments — The Company accounts for derivative financial instruments by recognizing derivative instruments as either assets or liabilities in the Consolidated Balance Sheets at fair value and recognizing the resulting gains or losses as adjustments to the Consolidated Statements of Operations or "Accumulated Other Comprehensive Loss." The Company does not hold or issue derivative financial instruments for trading or speculative purposes. For
Business Combinations	Business Combinations — In accounting for business combinations, we apply the accounting requirements of ASC 805, which requires the recording of net assets of acquired businesses at fair value. The Company utilizes management estimates and an independent third-party valuation firm to assist in determining the fair values of acquired assets and assumed liabilities. In developing estimates of the fair value of net assets, the Company analyzes a variety of factors including market data, estimated future cash flows of the acquired operations, industry growth rates, current replacement cost for fixed assets, and market rate assumptions for contractual obligations. Such a valuation requires management to make significant estimates and assumptions, particularly with respect to the intangible assets.
Fair Value Measurements	Fair Value Measurements — Fair value of financial and non-financial assets and liabilities is defined as the price representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value is utilized to measure certain investments on a recurring basis. Fair value measurements are also utilized to determine the initial value of assets and liabilities acquired in a business combination, to perform impairment tests, and for disclosure purposes. Management uses quoted market prices and observable inputs to the maximum extent possible when measuring fair value. In the absence of quoted market prices or observable inputs, fair value is determined using valuation models that incorporate assumptions that a market participant would use in pricing the asset or liability. Fair value measurements are classified within one of three levels, which prioritize the inputs used in the methodologies of measuring fair value for assets and liabilities, as follows: Level 1 — Quoted market prices for identical instruments in an active market; Level 2 — Quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs); and Level 3 — Unobservable inputs that reflect management's determination of assumptions that market participants would use in pricing the asset or liability. These inputs are developed based on the best information available, including our own data. The determination of where an asset or liability falls in the hierarchy requires significant judgment.
Foreign Currency Translation and Transactions	Foreign Currency Translation and Transactions — The financial position of foreign subsidiaries is translated at the exchange rates in effect at the end of the period, while revenues and expenses are translated at average rates of exchange during the period. Gains or losses from translation of foreign operations where the local currency is the functional currency are included as components of accumulated other comprehensive income. Gains and losses arising from foreign currency transactions are recorded in "Other (income) expense, net" in the period incurred.
Recently Issued Accounting Standards	In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2016-02, Leases, which represents a wholesale change to lease accounting. Since that date, the FASB has issued additional ASUs clarifying certain aspects of ASU 2016-02 but did not change the core principal. The standard introduces a lessee model that brings most leases onto the balance sheet, as well as aligns certain underlying principles of the new lessor model with those in ASC 606. The ASU is effective for public entities for fiscal years beginning after December 15, 2018. The Company adopted the standard and all subsequent amendments effective January 1, 2019, using the modified retrospective transition method, which did not require the Company to adjust comparative periods. The Company elected the package of practical expedients permitted under the transition guidance, which allowed the Company to carryforward its historical assessments of: (1) whether contracts are or contain leases, (2) lease classification and (3) initial direct costs. In addition to the package of practical expedients, the Company elected the practical expedients of using hindsight in determining the lease term and in assessing impairment of the entity’s right-of-use assets as well as not to assess whether existing or expired land easements that were not previously accounted for as leases under ASC 840 are or contain a lease under ASC 842. Upon adoption of this standard, the Company recognized operating lease right-of-use assets of $38.3 million and operating lease liabilities of $46.2 million in the Consolidated Balance Sheets for 2019. The Company elected the practical expedient outlined in ASU 2018-11 allowing entities to initially apply the new lease standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The adoption of ASU 2016-02 had no impact to accumulated deficit. The Company implemented internal controls and procured a third-party lease accounting software solution to facilitate the ongoing accounting and financial reporting requirements of the ASU. The standard did not have a material impact on our Consolidated Statements of Operations for 2019. The most significant impact was the recognition of right-of-use assets and lease liabilities for operating leases, while our accounting for finance leases remained substantially unchanged. See Note 9 for required disclosures as a result of adopting ASC 842. In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326), which replaces the incurred loss model with the current expected credit loss (“CECL”) model to estimate credit losses for financial assets measured at amortized cost and certain off-balance sheet credit exposures. The CECL model requires a company to estimate credit losses expected over the life of the financial assets based on all relevant information including historical information, current conditions and reasonable and supportable forecasts that affect the collectability of the amounts. This standard is effective for public entities for fiscal years beginning after December 15, 2019. The standard requires a modified retrospective approach by recording a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. ASU 2016-13 was amended in November 2018 by the provisions of ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, in April 2019 by the provisions of ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, in May 2019 by the provisions of ASU 2019-05, Financial Instruments – Credit Loses (Topic 326), and in November 2019 by the provisions of ASU 2019-11, Codification Improvements to Topic 326, Financial Instruments – Credit Losses. The Company adopted this ASU and all subsequent amendments effective January 1, 2020. In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software, which aligns the accounting for implementation costs incurred in a hosting arrangement that is a service contract with the requirements in ASC 350-40 for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments in this ASU also require the entity to present the expense related to the capitalized implementation costs in the same line item in the statement of income as the fees associated with the hosting element of the arrangement and classify payments for capitalized implementation costs in the statement of cash flows in the same manner as payments made for fees associated with the hosting element. The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. The amendments should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Early adoption is permitted in any interim period after issuance of the update. The Company early adopted this standard prospectively effective January 1, 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes, eliminates certain exceptions within Income Taxes (740) In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting . The ASU is intended to provide temporary optional expedients and exceptions to the U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates. These amendments are effective as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020 and may be applied prospectively to contract modifications made and hedging relationships entered into or evaluated on or before December 31, 2022. The Company is currently evaluating our contracts and the optional expedients provided by the new standard. In August 2020, the FASB issued ASU 2020-06, Subtopic 470-20 Subtopic 815-40 Other accounting standards that have been issued or proposed by the FASB or other standards-setting bodies that do not require adoption until a future date are not expected to have a material impact on the Company’s consolidated financial statements upon adoption.
Earnings Per Common Share	Basic earnings per common share ("EPS") is based upon the weighted-average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that would occur upon issuance of common shares for awards under stock-based compensation plans, or conversion of preferred stock, but only to the extent that they are considered dilutive.
Fair Value Measurement	The fair value of the interest rate swaps are categorized as Level 2 in the fair value hierarchy as they are based on well-recognized financial principles and available market data.The fair value of our long-term debt was based on closing or estimated market prices of the Company’s debt at December 31, 2020 and December 31, 2019, which is considered Level 2 of the fair value hierarchy.  The fair value of other financing arrangements was calculated using a discounted cash flow model that incorporates current borrowing rates for obligations of similar duration, which is considered Level 3 of the fair value hierarchy.

Description of Business and A_3

Description of Business and Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash	A reconciliation of cash, cash equivalents and (dollars in millions) December 31, 2020 December 31, 2019 December 31, 2018 Cash and cash equivalents $ 12.2 $ 11.6 $ 15.4 Restricted cash included in Other noncurrent assets 5.0 — — Cash, cash equivalents and restricted cash per Consolidated Statements of Cash Flows $ 17.2 $ 11.6 $ 15.4

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Schedule of Expected Revenue to be Recognized for Existing IRU Contracts	The expected revenue to be recognized for existing IRU contracts is as follows: (dollars in millions) 2021 $ 2.5 2022 2.6 2023 2.5 2024 2.6 2025 2.6 Thereafter 22.0
Schedule of Activity of Contract Assets	The following table presents the activity for the Company’s contract assets: Fulfillment Costs Cost of Acquisition Total Contract Assets Entertainment IT Services Entertainment IT Services Entertainment IT Services and and Total and and Total and and Total (dollars in millions) Communications Hardware Company Communications Hardware Company Communications Hardware Company Balance as of December 31, 2017 $ 17.5 $ 2.0 $ 19.5 $ 11.6 $ 1.3 $ 12.9 $ 29.1 $ 3.3 $ 32.4 Additions 9.9 1.9 11.8 7.9 1.7 9.6 17.8 3.6 21.4 Amortization (12.9 ) (1.4 ) (14.3 ) (6.5 ) (1.0 ) (7.5 ) (19.4 ) (2.4 ) (21.8 ) Balance as of December 31, 2018 14.5 2.5 17.0 13.0 2.0 15.0 27.5 4.5 32.0 Additions 3.6 3.5 7.1 10.0 1.6 11.6 13.6 5.1 18.7 Amortization (10.1 ) (1.9 ) (12.0 ) (8.2 ) (1.3 ) (9.5 ) (18.3 ) (3.2 ) (21.5 ) Balance as of December 31, 2019 8.0 4.1 12.1 14.8 2.3 17.1 22.8 6.4 29.2 Additions 3.6 2.2 5.8 9.4 3.5 12.9 13.0 5.7 18.7 Amortization (8.1 ) (2.4 ) (10.5 ) (8.4 ) (2.2 ) (10.6 ) (16.5 ) (4.6 ) (21.1 ) Balance as of December 31, 2020 $ 3.5 $ 3.9 $ 7.4 $ 15.8 $ 3.6 $ 19.4 $ 19.3 $ 7.5 $ 26.8
Schedule of Revenues Disaggregation by Product and Service Lines	The following table presents revenues disaggregated by product and service lines: Year ended December 31, (dollars in millions) 2020 2019 2018 Data $ 479.4 $ 475.0 $ 402.6 Video 193.8 203.0 183.3 Voice 262.8 284.9 244.9 Other 33.6 32.8 22.6 Total Entertainment and Communications 969.6 995.7 853.4 Consulting 196.0 152.6 138.7 Cloud 86.2 92.1 98.0 Communications 215.0 198.7 178.5 Infrastructure Solutions 119.4 124.0 135.7 Total IT Services and Hardware 616.6 567.4 550.9 Intersegment revenue (26.4 ) (26.4 ) (26.1 ) Total revenue $ 1,559.8 $ 1,536.7 $ 1,378.2 Year ended December 31, (dollars in millions) 2020 2019 2018 Entertainment and Communications Products and services transferred at a point in time $ 27.9 $ 31.7 $ 25.3 Products and services transferred over time 922.0 942.4 805.8 Intersegment revenue 19.7 21.6 22.3 Total Entertainment and Communications 969.6 995.7 853.4 IT Services and Hardware Products and services transferred at a point in time 127.9 138.7 142.9 Products and services transferred over time 482.0 423.9 404.2 Intersegment revenue 6.7 4.8 3.8 Total IT Services and Hardware 616.6 567.4 550.9 Total Revenue Total products and services transferred at a point in time 155.8 170.4 168.2 Total products and services transferred over time 1,404.0 1,366.3 1,210.0 Total revenue $ 1,559.8 $ 1,536.7 $ 1,378.2

Mergers and Acquisitions (Table

Mergers and Acquisitions (Tables) - Hawaiian Telcom Holdco, Inc. [Member]	12 Months Ended
	Dec. 31, 2020
Business Acquisition [Line Items]
Schedule of Consideration	The purchase price for Hawaiian Telcom consisted of the following: (dollars in millions) Cash consideration plus debt assumed $ 536.5 Cincinnati Bell Inc. stock issued 121.2 Debt repayment (318.2 ) Total purchase price $ 339.5
Purchase Price Allocation	The determination of the purchase price allocation to specific assets acquired and liabilities assumed is final for the Hawaiian Telcom transaction. The purchase price for Hawaiian Telcom has been allocated to individual assets acquired and liabilities assumed as follows: (dollars in millions) Hawaiian Telcom Assets acquired Cash $ 4.3 Receivables 24.8 Inventory, materials and supplies 6.7 Prepaid expenses and other current assets 5.9 Property, plant and equipment 697.6 Goodwill 10.2 Intangible assets 52.0 Deferred income tax asset 45.6 Other noncurrent assets 2.1 Total assets acquired 849.2 Liabilities assumed Accounts payable 60.0 Current portion of long-term debt 10.2 Unearned revenue and customer deposits 13.5 Accrued expenses and other current liabilities 21.8 Long-term debt, less current portion 304.5 Pension and postretirement benefit obligations 68.9 Other noncurrent liabilities 30.8 Total liabilities assumed 509.7 Net assets acquired $ 339.5
Estimated Fair Value of Identifiable Intangible Assets and Estimated Useful Lives	The estimated fair value of identifiable intangible assets and their estimated useful lives are as follows: Hawaiian Telcom (dollars in millions) Fair Value Useful Lives Customer relationships $ 26.0 15 years Trade name 26.0 15 years Total identifiable intangible assets $ 52.0
Pro Forma Information	The following table provides the unaudited pro forma results of operations for the year ended 2018 as if the acquisition of Hawaiian Telcom had taken place as of the beginning of fiscal year 2017. These pro forma results include adjustments related to the financing of the acquisitions, an increase to depreciation and amortization associated with the higher values of property, plant and equipment and intangible assets, an increase to interest expense for the additional debt incurred to complete the acquisitions, and reflects the related income tax effect and change in tax status. The pro forma information does not necessarily reflect the actual results of operations had the acquisitions been consummated at the beginning of the annual reporting period indicated, nor is it necessarily indicative of future operating results. The pro forma information does not include any (i) potential revenue enhancements, cost synergies or other operating efficiencies that could result from the acquisitions or (ii) transaction or integration costs relating to the acquisitions. Year Ended December 31, (dollars in millions, except per share amounts) 2018 Revenue $ 1,556.5 Net loss applicable to common shareholders (77.2 ) Earnings per share: Basic and diluted loss per common share (1.54 )

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Computation of Basis and Diluted Earnings Per Share	The following table shows the computation of basic and diluted EPS: Year Ended December 31, (in millions, except per share amounts) 2020 2019 2018 Numerator: Net loss $ (55.6 ) $ (66.6 ) $ (69.8 ) Preferred stock dividends 10.4 10.4 10.4 Net loss applicable to common shareowners - basic and diluted $ (66.0 ) $ (77.0 ) $ (80.2 ) Denominator: Weighted-average common shares outstanding - basic 50.6 50.4 46.3 Stock-based compensation arrangements — — — Weighted-average common shares outstanding - diluted 50.6 50.4 46.3 Basic and diluted net loss per common share $ (1.30 ) $ (1.53 ) $ (1.73 )

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property Plant And Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, plant and equipment is comprised of the following: December 31, Depreciable (dollars in millions) 2020 2019 Lives (Years) Land and rights-of-way $ 115.7 $ 117.2 20 – Indefinite Buildings and leasehold improvements 323.8 315.4 5 – 40 Network equipment 4,180.0 4,044.6 2 – 50 Office software, furniture, fixtures and vehicles 243.7 229.3 2 – 14 Construction in process 60.4 38.9 n/a Gross value 4,923.6 4,745.4 Accumulated depreciation (3,194.5 ) (2,964.6 ) Property, plant and equipment, net $ 1,729.1 $ 1,780.8

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The changes in the Company's goodwill consisted of the following: IT Services and Hardware Entertainment and Communications Total Company December 31, December 31, December 31, December 31, December 31, December 31, (dollars in millions) 2020 2019 2020 2019 2020 2019 Goodwill, beginning balance $ 148.1 $ 146.0 $ 12.4 $ 11.0 $ 160.5 $ 157.0 Activity during the year Adjustments to prior year acquisitions — — — 1.4 — 1.4 Currency translations 1.0 2.1 — — 1.0 2.1 Goodwill, ending balance $ 149.1 $ 148.1 $ 12.4 $ 12.4 $ 161.5 $ 160.5
Schedule of Intangible Assets	The Company’s intangible assets consisted of the following: December 31, 2020 December 31, 2019 Gross Gross Carrying Accumulated Net Carrying Accumulated Net (dollars in millions) Amount Amortization Amount Amount Amortization Amount Intangible assets subject to amortization Customer relationships $ 141.6 $ (38.9 ) $ 102.7 $ 140.8 $ (28.4 ) $ 112.4 Trade names 41.7 (9.4 ) 32.3 41.3 (6.0 ) 35.3 Technology 9.9 (3.2 ) 6.7 9.9 (2.2 ) 7.7 Total 193.2 (51.5 ) 141.7 192.0 (36.6 ) 155.4 Intangible assets not subject to amortization FCC licenses and spectrum usage rights 6.4 — 6.4 — — — Total intangible assets $ 199.6 $ (51.5 ) $ 148.1 $ 192.0 $ (36.6 ) $ 155.4
Schedule of Estimated Useful Lives for Finite-Lived Intangible Assets	The estimated useful lives for each finite-lived intangible asset class are as follows: Customer relationships 8 to 15 years Trade names 10 to 15 years Technology 10 years
Schedule of Estimated Amortization Expense	The annual estimated amortization expense for future years is as follows: (dollars in millions) Year ended December 31, 2021 $ 14.3 2022 14.1 2023 13.7 2024 13.5 2025 13.3 Thereafter 72.8 Total $ 141.7

Debt and Other Financing Arra_2

Debt and Other Financing Arrangements (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of Debt	The Company’s debt consists of the following: December 31, (dollars in millions) 2020 2019 Current portion of long-term debt: Credit Agreement - Tranche B Term Loan due 2024 $ 6.0 $ 6.0 Other financing arrangements 1.9 2.0 Finance lease liabilities 13.9 14.3 Current portion of long-term debt 21.8 22.3 Long-term debt, less current portion: Receivables Facility 182.0 131.5 Credit Agreement - Revolving Credit Facility 67.0 57.0 Credit Agreement - Tranche B Term Loan due 2024 580.5 586.5 7 1/4% 22.3 22.3 7% Senior Notes due 2024 625.0 625.0 8% Senior Notes due 2025 350.0 350.0 Various Cincinnati Bell Telephone notes 87.9 87.9 Other financing arrangements 0.9 3.2 Finance lease liabilities 52.1 59.5 1,967.7 1,922.9 Net unamortized premium 1.1 1.3 Unamortized note issuance costs (18.9 ) (22.9 ) Long-term debt, less current portion 1,949.9 1,901.3 Total debt $ 1,971.7 $ 1,923.6
Debt Maturity Schedule	The following table summarizes our annual principal maturities of debt and other financing arrangements for the five years subsequent to December 31, 2020, and thereafter: Other financing (dollars in millions) Debt arrangements Year ended December 31, 2021 $ 6.0 $ 1.9 2022 73.0 0.5 2023 210.3 0.4 2024 1,193.5 — 2025 350.0 — Thereafter 87.9 — 1,920.7 2.8 Net unamortized premium 1.1 — Unamortized note issuance costs (18.9 ) — Total debt $ 1,902.9 $ 2.8

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Schedule of Supplemental Balance Sheet Information Related to Leases	Supplemental balance sheet information related to the Company's leases was as follows: December 31, (dollars in millions) Balance Sheet Location 2020 2019 Operating lease assets, net of amortization Operating lease right-of-use assets $ 37.4 $ 35.8 Finance lease assets, net of amortization Property, plant and equipment, net 28.0 33.2 Operating lease liabilities: Current operating lease liabilities Other current liabilities 9.6 10.9 Noncurrent operating lease liabilities Operating lease liabilities 33.6 32.1 Total operating lease liabilities 43.2 43.0 Finance lease liabilities: Current finance lease liabilities Current portion of long-term debt 13.9 14.3 Noncurrent finance lease liabilities Long-term debt, less current portion 52.1 59.5 Total finance lease liabilities $ 66.0 $ 73.8
Components of Lease Expense	The components of lease expense were as follows: Year Ended December 31, (dollars in millions) 2020 2019 Operating lease cost $ 13.0 $ 13.2 Short-term lease cost 0.3 0.3 Variable lease cost 2.6 2.1 Finance lease cost: Depreciation on leased assets 7.0 8.3 Interest on lease liabilities 4.5 5.1 Total lease cost $ 27.4 $ 29.0
Schedule of Other Information Related to Leases	Other information related to leases was as follows: Year Ended December 31, (dollars in millions) 2020 2019 Supplemental Cash Flows Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 4.4 $ 5.1 Operating cash flows from operating leases $ 12.1 $ 11.0 Financing cash flows from finance leases $ 16.6 $ 14.4 Right-of-use assets obtained in exchange for lease obligations: New operating leases $ 12.6 $ 7.5 New finance leases $ 7.7 $ 14.5 Weighted Average Remaining Lease Term Operating leases 7.35 years 7.93 years Finance leases 6.88 years 7.20 years Weighted Average Discount Rate Operating leases 5.42 % 6.94 % Finance leases 7.08 % 7.00 %
Schedule of Future Minimum Lease Payments Under Non-Cancellable Leases	Future minimum lease payments under non-cancellable leases as of December 31, 2020 are as follows: (dollars in millions) Operating Leases Finance Leases Year ended December 31, 2021 $ 11.7 $ 17.5 2022 8.7 12.7 2023 7.3 9.2 2024 5.5 8.4 2025 4.3 7.4 Thereafter 17.2 29.5 Total future minimum lease payments 54.7 84.7 Less imputed interest (10.4 ) (18.7 ) Total $ 44.3 $ 66.0
Schedule of Future Minimum Lease Payments to be Received under Non-Cancellable Leases	Future minimum lease payments to be received under non-cancellable leases as of December 31, 2020 are as follows: (dollars in millions) Operating Leases Year ended December 31, 2021 $ 2.4 2022 1.9 2023 1.8 2024 1.8 2025 1.7 Thereafter 15.4 Total future minimum lease payments 25.0 Less imputed interest (8.8 ) Total $ 16.2

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2020
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Payments Under Base Arrangements and Renewal Options	The future minimum payments under the base agreements, as well as the renewal options for each lease which the Company expects to exercise, are as follows: (dollars in millions) Year ended December 31, 2021 $ 0.8 2022 3.5 2023 5.8 2024 5.8 2025 5.8 Thereafter 52.0 Total future minimum financing obligation payments 73.7 Less imputed interest (33.5 ) Total $ 40.2
Schedule of Change in Asset Retirement Obligation	The following table presents the activity for the Company’s asset retirement obligations: December 31, (dollars in millions) 2020 2019 Balance, beginning of period $ 7.1 $ 9.1 Hawaiian Telcom opening balance sheet adjustment — (3.2 ) Liabilities incurred — 1.8 Liabilities settled (0.6 ) (0.7 ) Accretion expense 0.2 0.1 Balance, end of period $ 6.7 $ 7.1

Financial Instruments and Fai_2

Financial Instruments and Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Interest rate Swaps Recorded in Condensed Consolidated Balance Sheets	As of December 31, 2020, the fair value of the interest rate swap liability was $25.4 million and is recorded in the Consolidated Balance Sheets as follows: Quoted Prices in Significant Significant Active Observable Unobservable December 31, Markets Inputs Inputs (dollars in millions) Balance Sheet Location 2020 Level 1 Level 2 Level 3 Liabilities: Interest Rate Swap Other current liabilities $ 9.3 $ — $ 9.3 $ — Interest Rate Swap Other noncurrent liabilities $ 16.1 $ — $ 16.1 $ — As of December 31, 2019, the fair value of the interest rate swap liability was $19.0 million and is recorded in the Consolidated Balance Sheets as of December 31, 2019 as follows: Quoted Prices in Significant Significant Active Observable Unobservable December 31, Markets Inputs Inputs (dollars in millions) Balance Sheet Location 2019 Level 1 Level 2 Level 3 Liabilities: Interest Rate Swap Other current liabilities $ 5.7 $ — $ 5.7 $ — Interest Rate Swap Other noncurrent liabilities $ 13.3 $ — $ 13.3 $ —
Amount of (Losses) Gains Recognized in Accumulated Other Comprehensive Income Net of Reclassification into Earnings	The amount of losses recognized in Accumulated Other Comprehensive Income ("AOCI") net of reclassifications into earnings is as follows: Year Ended December 31, (dollars in millions) 2020 2019 Interest Rate Swap $ (6.4 ) $ (14.0 )
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)	The amount of losses reclassified from AOCI into earnings is as follows: Year Ended December 31, (dollars in millions) Statement of Operations Location 2020 2019 Interest Rate Swap Interest Expense $ (8.4 ) $ (2.2 )
Schedule of Carrying and Fair Values by Balance Sheet Grouping	The carrying and fair values of these items are as follows: December 31, 2020 December 31, 2019 (dollars in millions) Carrying Value Fair Value Carrying Value Fair Value Long-term debt, including current portion* $ 1,921.8 $ 1,973.4 $ 1,867.5 $ 1,921.5 Other financing arrangements 42.1 58.6 43.5 55.5 * Excludes finance leases, other financing arrangements and note issuance costs

Pension and Postretirement Pl_2

Pension and Postretirement Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Schedule of Pension and Postretirement Benefit Costs	Pension and postretirement benefit costs for these plans were comprised of: Pension Benefits Postretirement and Other Benefits (dollars in millions) 2020 2019 2018 2020 2019 2018 Service cost $ — $ — $ — $ 0.4 $ 0.6 $ 0.6 Interest cost on projected benefit obligation 18.8 23.9 20.0 3.7 5.0 4.2 Expected return on plan assets (29.0 ) (30.7 ) (29.8 ) — — — Amortization of: Prior service benefit — — — (2.5 ) (2.5 ) (3.1 ) Actuarial loss 18.1 13.7 17.0 1.2 1.8 4.1 Pension settlement charges 3.8 — 0.1 — — — Pension/postretirement cost $ 11.7 $ 6.9 $ 7.3 $ 2.8 $ 4.9 $ 5.8
Schedule of Changes in Projected Benefit Obligations	Changes in the plans' benefit obligations and funded status are as follows: Pension Benefits Postretirement and Other Benefits (dollars in millions) 2020 2019 2020 2019 Change in benefit obligation: Benefit obligation at January 1, $ 652.9 $ 606.8 $ 116.3 $ 123.7 Service cost — — 0.4 0.6 Interest cost 18.8 23.9 3.7 5.0 Actuarial loss (gain) (a) (b) 62.8 72.7 (3.5 ) (5.1 ) Benefits paid (39.3 ) (49.5 ) (7.9 ) (8.6 ) Retiree drug subsidy received — — 0.1 0.1 Settlements (c) (21.1 ) (1.0 ) — — Other — — 0.5 0.6 Benefit obligation at December 31, $ 674.1 $ 652.9 $ 109.6 $ 116.3 Change in plan assets: Fair value of plan assets at January 1, $ 538.8 $ 482.4 $ 4.3 $ 5.8 Actual return on plan assets 84.5 101.0 0.1 0.3 Employer contributions 7.7 5.9 6.5 6.7 Retiree drug subsidy received — — 0.1 0.1 Benefits paid (39.3 ) (49.5 ) (7.9 ) (8.6 ) Settlements (c) (21.1 ) (1.0 ) — — Fair value of plan assets at December 31, 570.6 538.8 3.1 4.3 Unfunded status $ (103.5 ) $ (114.1 ) $ (106.5 ) $ (112.0 ) (a) The actuarial loss recorded during the periods ended December 31, 2020 and 2019 for the pension plans was primarily driven by changes in the discount rate as well as gains or losses to record pension assets to fair value. (b) The actuarial (gain) recorded for the period ending December 31, 2020 for the postretirement plans is primarily due to an updated participation assumption for the Hawaii plans for terminated vested participants as a result of an experience study completed in 2020 partially offset by changes to the discount rate for both plans. The actuarial (gain) recorded for the period ending December 31, 2019 is primarily due to updated participant assumptions for the Hawaii plans partially offset by changes to the discount rate and updated mortality tables. (c) The increase in pension plan settlements in 2020 increased due to participant elections to take lump sum payments upon termination as result of the voluntary severance program offered to employees in both Cincinnati and Hawaii. The extent of the funding exceeded the settlement accounting threshold, and as such in the year ended December 31, 2020, these activities have been categorized as settlements.
Schedule of Amounts Recognized in Balance Sheet	The projected benefit obligation is recognized in the Consolidated Balance Sheets as follows: Pension Benefits Postretirement and Other Benefits December 31, December 31, (dollars in millions) 2020 2019 2020 2019 Accrued payroll and benefits (current liability) $ 2.1 $ 2.1 $ 8.5 $ 9.5 Pension and postretirement benefit obligations (noncurrent liability) 101.4 112.0 98.0 102.5 Total $ 103.5 $ 114.1 $ 106.5 $ 112.0
Schedule of Net Periodic Benefit Cost Not yet Recognized	Amounts recognized in "Accumulated other comprehensive loss" in the Consolidated Balance Sheets which have not yet been recognized in net pension costs consisted of the following: Pension Benefits Postretirement and Other Benefits December 31, December 31, (dollars in millions) 2020 2019 2020 2019 Prior service (cost) benefit, net of tax of ($0.1), ($0.1), $3.4, $4.0 $ (0.1 ) $ (0.1 ) $ 13.7 $ 15.6 Actuarial loss, net of tax of ($39.0), ($42.4), ($4.3), ($5.4) (136.1 ) (147.5 ) (16.3 ) (20.0 ) Total $ (136.2 ) $ (147.6 ) $ (2.6 ) $ (4.4 )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	Amounts recognized in "Accumulated other comprehensive loss" on the Consolidated Statements of Shareowners’ Deficit and the Consolidated Statements of Comprehensive Income are shown below: Pension Benefits Postretirement and Other Benefits (dollars in millions) 2020 2019 2020 2019 Prior service cost recognized: Reclassification adjustments $ — $ — $ (2.5 ) $ (2.5 ) Actuarial (loss) gain recognized: Reclassification adjustments 21.9 13.7 1.2 1.8 Actuarial (loss) gain arising during the period (7.1 ) (2.3 ) 3.6 5.5
Schedule of Allocation of Plan Assets	The fair values of the pension plan assets at December 31, 2020 and 2019 by asset category are as follows: (dollars in millions) December 31, 2020 Quoted Prices in active markets Level 1 Significant observable inputs Level 2 Significant unobservable inputs Level 3 Mutual funds U.S. equity index funds $ 151.2 $ 151.2 $ — $ — International equity index funds 152.4 152.4 — — Fixed income bond funds 265.0 265.0 — — Fixed income short-term money market funds 2.0 2.0 — — Group insurance contract 3.1 — — — Total $ 573.7 $ 570.6 $ — $ — (dollars in millions) December 31, 2019 Quoted Prices in active markets Level 1 Significant observable inputs Level 2 Significant unobservable inputs Level 3 Mutual funds U.S. equity index funds $ 137.2 $ 137.2 $ — $ — International equity index funds 137.4 137.4 — — Fixed income bond funds 263.7 263.7 — — Fixed income short-term money market funds 0.5 0.5 — — Group insurance contract 4.3 — — — Total $ 543.1 $ 538.8 $ — $ —
Schedule of Expected Benefit Payments	The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid over the next ten years: (dollars in millions) Pension Benefits Postretirement and Other Benefits Medicare Subsidy Receipts 2021 $ 55.3 $ 8.7 $ (0.2 ) 2022 54.6 8.2 (0.2 ) 2023 51.0 7.8 (0.1 ) 2024 50.0 7.4 (0.1 ) 2025 49.0 7.0 (0.1 ) Years 2026 - 2030 198.7 30.6 (0.4 )
Cincinnati Plans [Member]
Schedule of Health Care Cost Trend Rates	The assumed healthcare cost trend rate used to measure the postretirement health benefit obligation is shown below: Cincinnati Plans December 31, 2020 2019 Healthcare cost trend 6.5 % 6.5 % Rate to which the cost trend is assumed to decline (ultimate trend rate) 4.5 % 4.5 % Year the rates reach the ultimate trend rate 2025 2024
Cincinnati Plans [Member] | Net Periodic Cost [Member]
Schedule of Assumptions Used	The following are the weighted-average assumptions used in measuring the net periodic cost of the pension and postretirement benefits: Cincinnati Plans Pension Benefits Postretirement and Other Benefits 2020 2019 2018 2020 2019 2018 Discount rate 3.10 % 4.20 % 3.60 % 3.20 % 4.30 % 3.60 % Expected long-term rate of return 6.00 % 6.50 % 7.00 % — — — Cash balance interest credit rate 4.00 % 4.00 % 4.00 % — — — Future compensation growth rate — — — — — —
Cincinnati Plans [Member] | Projected Benefit Obligation [Member]
Schedule of Assumptions Used	The following are the weighted-average assumptions used in accounting for and measuring the projected benefit obligations: Cincinnati Plans Pension Benefits Postretirement and Other Benefits December 31, December 31, 2020 2019 2020 2019 Discount rate 2.40 % 3.10 % 2.40 % 3.20 % Cash balance interest credit rate 4.00 % 4.00 % — — Future compensation growth rate — — — —
Hawaii Plans [Member] | Net Periodic Cost [Member]
Schedule of Assumptions Used	Hawaii Plans Pension Benefits Postretirement and Other Benefits 2020 2019 2018 2020 2019 2018 Discount rate 2.80 % 4.20 % 4.10 % 3.30 % 4.40 % 4.20 % Expected long-term rate of return 6.00 % 6.50 % 7.00 % — — — Cash balance interest credit rate 2.00 % 2.20 % 3.10 % — — — Future compensation growth rate — — — — — —
Hawaii Plans [Member] | Projected Benefit Obligation [Member]
Schedule of Assumptions Used	Hawaii Plans Pension Benefits Postretirement and Other Benefits December 31, December 31, 2020 2019 2020 2019 Discount rate 2.30 % 3.10 % 2.60 % 3.30 % Cash balance interest credit rate 1.20 % 2.30 % — — Future compensation growth rate — — — —

Shareowners' Deficit (Tables)

Shareowners' Deficit (Tables)	12 Months Ended
	Dec. 31, 2020
Shareowners Deficit [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Loss by Component	For the years ended December 31, 2020 and 2019, the changes in accumulated other comprehensive loss by component were as follows: (dollars in millions) Unrecognized Net Periodic Pension and Postretirement Benefit Cost Unrealized Loss on Cash Flow Hedges, Net Foreign Currency Translation Loss Total Balance as of December 31, 2018 $ (164.5 ) $ (3.9 ) $ (7.1 ) $ (175.5 ) Remeasurement of benefit obligations 2.5 — — 2.5 Reclassifications, net 10.0 (a) 1.7 (b) — 11.7 Unrealized loss on cash flow hedges arising during the period, net — (12.5 ) (c) — (12.5 ) Foreign currency gain — — 3.7 3.7 Balance as of December 31, 2019 $ (152.0 ) $ (14.7 ) $ (3.4 ) $ (170.1 ) Remeasurement of benefit obligations (2.7 ) — — (2.7 ) Reclassifications, net 15.9 (a) 6.4 (b) — 22.3 Unrealized loss on cash flow hedges arising during the period, net — (11.4 ) (c) — (11.4 ) Foreign currency gain — — 2.2 2.2 Balance as of December 31, 2020 $ (138.8 ) $ (19.7 ) $ (1.2 ) $ (159.7 ) (a ) These reclassifications are included in the other components of net periodic pension and postretirement benefit plans expense and represent amortization of prior service benefit and actuarial loss, net of tax and pension settlement charges, net of tax. The other components of net periodic pension and postretirement benefit plans expense are recorded in "Other components of pension and postretirement benefit plans expense" on the Consolidated Statements of Operations. See Note 12 for further disclosures. (b ) These reclassifications are reported within "Interest expense" on the Consolidated Statements of Operations when the hedged transactions impact earnings. (c ) The unrealized loss on cash flow hedges represents the change in the fair value of the derivative instruments that occurred during the period, net of tax. The unrealized loss on cash flow hedges is recorded in "Other current liabilities" and "Other noncurrent liabilities" on the Consolidated Balance Sheets. See Note 11 for further disclosures.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense for Continuing Operations	Income tax expense for continuing operations consisted of the following: Year Ended December 31, (dollars in millions) 2020 2019 2018 Current: Federal $ (1.4 ) $ (1.4 ) $ (0.6 ) State and local 0.6 — 0.9 Foreign 3.5 0.5 1.6 Total current 2.7 (0.9 ) 1.9 Deferred: Federal (13.8 ) (9.1 ) (10.3 ) State and local 7.7 (1.5 ) 5.7 Foreign (1.3 ) 0.4 (1.0 ) Total deferred (7.4 ) (10.2 ) (5.6 ) Valuation allowance (20.8 ) 0.5 13.1 Total $ (25.5 ) $ (10.6 ) $ 9.4
Schedule of Effective Income Tax Rate Reconciliation	The following is a reconciliation of the statutory federal income tax rate with the effective tax rate for each year: Year Ended December 31, 2020 2019 2018 U.S. federal statutory rate 21.0 % 21.0 % 21.0 % State and local income taxes, net of federal income tax 1.4 2.1 1.4 Transaction costs (8.6 ) (3.0 ) (3.1 ) Non-Deductible meals and entertainment (0.4 ) (1.5 ) (1.8 ) Equity compensation — (1.7 ) 0.3 Merger adjustments — (1.7 ) — State net operating loss adjustments (9.5 ) (1.0 ) (10.1 ) Change in valuation allowance, net of federal income tax 25.7 (0.5 ) (21.8 ) Change in uncertain tax positions 2.5 — — Other differences, net (0.6 ) — (1.4 ) Effective tax rate 31.5 % 13.7 % (15.5 )%
Schedule of Income Tax Provision (Benefit) Charged to Continuing Operations, Accumulated Other Comprehensive Income (Loss) or Additional Paid-in Capital	The income tax (benefit) provision was charged to continuing operations or accumulated other comprehensive income (loss) as follows: Year Ended December 31, (dollars in millions) 2020 2019 2018 Income tax (benefit) provision related to: Continuing operations $ (25.5 ) $ (10.6 ) $ 9.4 Accumulated other comprehensive income 2.4 0.2 1.3
Schedule of Deferred Tax Assets and Liabilities	The components of our deferred tax assets and liabilities were as follows: December 31, (dollars in millions) 2020 2019 Deferred tax assets: Net operating loss carryforwards $ 239.9 $ 210.2 Finance and operating lease obligations 19.7 29.1 Pension and postretirement benefits 50.4 54.3 Employee benefits 9.1 6.1 Interest limitation — 16.6 State tax credit 9.0 9.2 Other 31.4 29.0 Total deferred tax assets 359.5 354.5 Valuation allowance (28.4 ) (49.3 ) Total deferred tax assets, net of valuation allowance $ 331.1 $ 305.2 Deferred tax liabilities: Property, plant and equipment and intangibles $ (250.9 ) $ (239.2 ) Other (8.6 ) (18.4 ) Total deferred tax liabilities (259.5 ) (257.6 ) Net deferred tax assets $ 71.6 $ 47.6
Schedule of Reconciliation of Unrecognized Tax Benefits	A reconciliation of the unrecognized tax benefits is as follows: Year Ended December 31, (dollars in millions) 2020 2019 2018 Balance, beginning of year $ 21.9 $ 22.0 $ 22.2 Change in tax positions for the current year (2.2 ) 0.2 — Change in tax positions for prior years (0.5 ) (0.3 ) (0.2 ) Balance, end of year $ 19.2 $ 21.9 $ 22.0

Stock-Based and Deferred Comp_2

Stock-Based and Deferred Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity	The following table summarizes stock options and stock appreciation rights activity: 2020 2019 2018 (in thousands, except per share amounts) Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Outstanding at January 1, 144 $ 18.35 151 $ 18.29 181 $ 17.10 Exercised — — — — (19 ) 8.68 Forfeited (1 ) 17.05 (7 ) 17.05 (9 ) 17.05 Expired — — — — (2 ) 8.35 Outstanding and exercisable at December 31, 143 $ 18.37 144 $ 18.35 151 $ 18.29 (dollars in millions) Compensation expense for the year $ — $ — $ — Tax benefit related to compensation expense $ — $ — $ — Intrinsic value of awards exercised $ — $ — $ 0.1 Cash received from awards exercised $ — $ — $ 0.2 Grant date fair value of awards vested $ — $ — $ —
Summary of Outstanding and Exercisable Awards	The following table summarizes our outstanding and exercisable awards at December 31, 2020: Outstanding Exercisable (in thousands, except per share amounts) Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Range of Grant Price $ 17.05 115 $ 17.05 115 $ 17.05 $23.75 to $26.05 28 23.83 28 23.83 Total 143 $ 18.37 143 $ 18.37
Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Nonvested Share Activity	The following table summarizes our outstanding performance-based restricted award activity: 2020 2019 2018 (in thousands, except per share amounts) Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Non-vested at January 1, 1,282 $ 13.00 692 $ 18.67 871 $ 17.30 Granted* — — 763 8.34 288 17.60 Vested (245 ) 22.03 (160 ) 15.45 (308 ) 15.45 Forfeited — — (13 ) 11.32 (159 ) 15.45 Non-vested at December 31, 1,037 $ 10.87 1,282 $ 13.00 692 $ 18.67 (dollars in millions) Compensation expense for the year $ 2.4 $ 2.7 $ 2.1 Tax benefit related to compensation expense $ (0.5 ) $ (0.6 ) $ (0.5 ) Grant date fair value of awards vested $ 5.4 $ 2.5 $ 4.7 * Assumes the maximum number of awards that can be earned if the performance conditions are achieved.
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Nonvested Share Activity	The following table summarizes our time-based restricted award activity: 2020 2019 2018 (in thousands, except per share amounts) Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Shares Weighted- Average Exercise Price Per Share Non-vested at January 1, 942 $ 11.67 497 $ 17.02 164 $ 18.57 Granted 68 14.99 625 8.43 245 17.05 Awards converted pursuant to Hawaiian Telcom acquisition — — — — 149 15.70 Vested (216 ) 13.58 (167 ) 15.39 (61 ) 18.08 Forfeited (2 ) 15.70 (13 ) 12.76 — — Non-vested at December 31, 792 $ 11.42 942 $ 11.67 497 $ 17.02 (dollars in millions) Compensation expense for the year $ 3.2 $ 4.7 $ 3.5 Tax benefit related to compensation expense $ (0.7 ) $ (1.1 ) $ (0.8 ) Grant date fair value of awards vested $ 2.9 $ 2.6 $ 1.1

Restructuring and Severance (Ta

Restructuring and Severance (Tables)	12 Months Ended
	Dec. 31, 2020
Restructuring And Related Activities [Abstract]
Summary of Activity in Restructuring and Severance Liability	A summary of activity in the restructuring and severance liability is shown below: (dollars in millions) Employee Separation Lease Abandonment Total Balance as of December 31, 2017 $ 14.4 $ 0.1 $ 14.5 Charges 7.5 0.8 8.3 Hawaiian Telcom opening balance sheet adjustment 3.8 — 3.8 Utilizations (16.2 ) (0.2 ) (16.4 ) Balance as of December 31, 2018 9.5 0.7 10.2 Charges 6.9 — 6.9 Hawaiian Telcom opening balance sheet adjustment 0.1 — 0.1 Utilizations (13.9 ) (0.4 ) (14.3 ) Balance as of December 31, 2019 2.6 0.3 2.9 Charges 16.9 — 16.9 Utilizations (15.0 ) (0.3 ) (15.3 ) Balance as of December 31, 2020 $ 4.5 $ — $ 4.5
Summary of Restructuring Activity by Business Segment	A summary of restructuring activity by business segment is presented below: (dollars in millions) Entertainment and Communications IT Services and Hardware Corporate Total Balance as of December 31, 2017 $ 12.3 $ 2.2 $ — $ 14.5 Charges 3.1 4.9 0.3 8.3 Hawaiian Telcom opening balance sheet adjustment 3.8 — — 3.8 Utilizations (10.6 ) (5.8 ) — (16.4 ) Balance as of December 31, 2018 8.6 1.3 0.3 10.2 Charges 4.9 2.0 — 6.9 Hawaiian Telcom opening balance sheet adjustment 0.1 — — 0.1 Utilizations (11.2 ) (2.8 ) (0.3 ) (14.3 ) Balance as of December 31, 2019 2.4 0.5 — 2.9 Charges 14.8 2.0 0.1 16.9 Utilizations (12.8 ) (2.5 ) — (15.3 ) Balance as of December 31, 2020 $ 4.4 $ — $ 0.1 $ 4.5

Business Segment Information (T

Business Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Schedule of Business Segment Information	Our business segment information is as follows: Year Ended December 31, (dollars in millions) 2020 2019 2018 Revenue Entertainment and Communications $ 969.6 $ 995.7 $ 853.4 IT Services and Hardware 616.6 567.4 550.9 Intersegment (26.4 ) (26.4 ) (26.1 ) Total revenue $ 1,559.8 $ 1,536.7 $ 1,378.2 Intersegment revenue Entertainment and Communications $ 19.7 $ 21.6 $ 22.3 IT Services and Hardware 6.7 4.8 3.8 Total intersegment revenue $ 26.4 $ 26.4 $ 26.1 Operating income Entertainment and Communications $ 99.7 $ 105.5 $ 103.3 IT Services and Hardware 24.6 2.6 17.2 Corporate (58.3 ) (35.0 ) (37.2 ) Total operating income $ 66.0 $ 73.1 $ 83.3 Expenditures for long-lived assets* Entertainment and Communications $ 206.4 $ 201.3 $ 408.0 IT Services and Hardware 23.5 22.4 29.2 Corporate 0.1 0.1 0.2 Total expenditures for long-lived assets $ 230.0 $ 223.8 $ 437.4 Depreciation and amortization Entertainment and Communications $ 252.7 $ 255.8 $ 210.8 IT Services and Hardware 40.6 48.9 41.0 Corporate 0.1 0.2 0.2 Total depreciation and amortization $ 293.4 $ 304.9 $ 252.0 *Includes cost of acquisitions and purchase of wireless spectrum assets As of December 31, (dollars in millions) 2020 2019 Assets Entertainment and Communications $ 1,803.3 $ 1,840.0 IT Services and Hardware 477.2 500.7 Corporate and eliminations 388.1 313.1 Total assets $ 2,668.6 $ 2,653.8

Quarterly Financial Informati_2

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Selected Quarterly Financial Information [Abstract]
Quarterly Financial Information	2020 First Second Third Fourth (in millions, except per common share amounts) Quarter Quarter Quarter Quarter Total Revenue $ 380.0 $ 380.0 $ 389.5 $ 410.3 $ 1,559.8 Operating (loss) income (20.2 ) 27.7 24.7 33.8 66.0 Net loss (34.0 ) (7.8 ) (8.2 ) (5.6 ) (55.6 ) Basic and diluted loss per common share $ (0.72 ) $ (0.21 ) $ (0.21 ) $ (0.16 ) $ (1.30 ) 2019 First Second Third Fourth (in millions, except per common share amounts) Quarter Quarter Quarter Quarter Total Revenue $ 379.6 $ 384.2 $ 382.5 $ 390.4 $ 1,536.7 Operating income 10.1 24.9 22.8 15.3 73.1 Net loss (26.9 ) (5.5 ) (13.6 ) (20.6 ) (66.6 ) Basic and diluted loss per common share $ (0.59 ) $ (0.16 ) $ (0.32 ) $ (0.46 ) $ (1.53 )

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2020
Supplemental Cash Flow Information [Abstract]
Schedule of Supplemental Cash Flow Information	Year Ended December 31, (dollars in millions) 2020 2019 2018 Capitalized interest expense $ 1.3 $ 1.7 $ 1.0 Cash paid/(received) for: Interest 125.5 129.3 131.7 Income taxes, net of refunds 0.5 0.5 (13.8 ) Noncash investing and financing activities: Stock consideration for acquisition of Hawaiian Telcom — — 121.2 Acquisition of property by assuming debt and other financing arrangements 7.7 14.5 51.5 Acquisition of property on account 24.3 26.0 35.8

Description of Business and A_4

Description of Business and Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2020USD ($)Customer	Dec. 31, 2019USD ($)Customer	Dec. 31, 2018USD ($)
Description of Business and Accounting Policies [Line Items]
Entity number of employees	4,600
Company employees participating in collective bargaining agreement, percentage	25.00%
Trade receivables due from customers, range, minimum	21 days
Trade receivables due from customers, range, maximum	90 days
Unbilled receivables, current	$ 41,000,000	$ 15,300,000
Allowance for uncollectible accounts	23,000,000	14,300,000
Factoring fees		700,000
Accounts receivable sold	0	44,700,000
Cost method investments	$ 6,900,000	$ 6,600,000
Revenue derived from foreign operations	5.00%	5.00%	6.00%
Service delivery period, indefeasible right of use contracts, upper range, in years	25 years
Customer contract, maintenance on telephony equipment, lower range, in years	1 year
Customer contract, maintenance on telephony equipment, upper range, in years	3 years
Advertising expense	$ 15,600,000	$ 18,600,000	$ 14,200,000
Regulatory taxes included in revenue	32,200,000	29,200,000	22,200,000
Regulatory taxes included in expense	$ 34,200,000	$ 32,500,000	$ 23,400,000
Pension Plans, Defined Benefit [Member] | Cincinnati Plans [Member]
Description of Business and Accounting Policies [Line Items]
Lower range, in years, of remaining service life of active employees	7 years
Upper range, in years, of remaining service life of active employees	11 years
Pension Plans, Defined Benefit [Member] | Hawaii Union Pension Plan [Member]
Description of Business and Accounting Policies [Line Items]
Average life expectancy of plan participants	31 years
Other Postretirement Benefits Plan [Member] | Cincinnati Plans [Member] | Minimum [Member]
Description of Business and Accounting Policies [Line Items]
Average life expectancy of retirees, in years	14 years
Other Postretirement Benefits Plan [Member] | Cincinnati Plans [Member] | Maximum [Member]
Description of Business and Accounting Policies [Line Items]
Average life expectancy of retirees, in years	15 years
Other Postretirement Benefits Plan [Member] | Hawaii Plans [Member]
Description of Business and Accounting Policies [Line Items]
Lower range, in years, of remaining service life of active employees	7 years
Upper range, in years, of remaining service life of active employees	8 years
Verizon Communications Inc. [Member]
Description of Business and Accounting Policies [Line Items]
Number of customers, exceeds 10% of total accounts receivable | Customer	1	1
Accounts receivable from one customer greater than 10%, percentage	20.00%	25.00%

Description of Business and A_5

Description of Business and Accounting Policies - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Cash and cash equivalents	$ 12.2	$ 11.6	$ 15.4
Restricted cash included in Other noncurrent assets	$ 5
Restricted Cash, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Cash, cash equivalents and restricted cash per Consolidated Statements of Cash Flows	$ 17.2	$ 11.6	$ 15.4	$ 396.5

Recently Issued Accounting St_2

Recently Issued Accounting Standards - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset	$ 37.4	$ 35.8	$ 38.3
Operating lease liabilities	$ 33.6	$ 32.1	$ 46.2
ASU 2016-02 [Member] | ASU Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 1, 2019
ASU 2016-13 [Member] | ASU Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 1, 2020
ASU 2018-15 [Member] | ASU Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 1, 2019
ASU 2019-12 [Member] | ASU Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	false
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false]	false

Revenue - Narrative (Details)

Revenue - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Payment terms for customers, lower range	30 days
Payment term for customers, upper range	120 days
Total	$ 34.8
Revenue, Remaining Performance Obligation, Percentage	80.00%
Unearned revenue and customer deposits	$ 68.9		$ 59.1
Reclassified revenue		$ 26.6
Other Current Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Unearned revenue and customer deposits	1.6		1.5
Other Noncurrent Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Contract liabilities, recognized, noncurrent	$ 26.2		$ 27.1
Minimum [Member]
Disaggregation Of Revenue [Line Items]
Customer contract term	1 year
SEA-US contract term	15 years
Indefeasible right of use of contract term	15 years
Maximum [Member]
Disaggregation Of Revenue [Line Items]
Customer contract term	5 years
SEA-US contract term	25 years
Indefeasible right of use of contract term	25 years
Indefeasible Right of Use, Maximum, in Years	30 years

Revenue - Schedule of Expected

Revenue - Schedule of Expected Revenue to be Recognized for Existing IRU Contracts (Details) $ in Millions	Dec. 31, 2020USD ($)
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Expected revenue to be recognized	$ 34.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Expected revenue to be recognized	$ 2.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Expected revenue to be recognized	$ 2.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Expected revenue to be recognized	$ 2.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Expected revenue to be recognized	$ 2.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Expected revenue to be recognized	$ 2.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Expected revenue to be recognized	$ 22
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period

Revenue - Schedule of Activity

Revenue - Schedule of Activity of Contract Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Contract Asset [Roll Forward]
Capitalized contract cost, net, beginning balance	$ 29.2	$ 32	$ 32.4
Capitalized contract cost, Additions	18.7	18.7	21.4
Capitalized contract cost, Amortization	(21.1)	(21.5)	(21.8)
Capitalized contract cost, net, ending Balance	26.8	29.2	32
Fulfillment Costs [Member]
Contract Asset [Roll Forward]
Capitalized contract cost, net, beginning balance	12.1	17	19.5
Capitalized contract cost, Additions	5.8	7.1	11.8
Capitalized contract cost, Amortization	(10.5)	(12)	(14.3)
Capitalized contract cost, net, ending Balance	7.4	12.1	17
Cost of Acquisition [Member]
Contract Asset [Roll Forward]
Capitalized contract cost, net, beginning balance	17.1	15	12.9
Capitalized contract cost, Additions	12.9	11.6	9.6
Capitalized contract cost, Amortization	(10.6)	(9.5)	(7.5)
Capitalized contract cost, net, ending Balance	19.4	17.1	15
Entertainment and Communications [Member]
Contract Asset [Roll Forward]
Capitalized contract cost, net, beginning balance	22.8	27.5	29.1
Capitalized contract cost, Additions	13	13.6	17.8
Capitalized contract cost, Amortization	(16.5)	(18.3)	(19.4)
Capitalized contract cost, net, ending Balance	19.3	22.8	27.5
Entertainment and Communications [Member] | Fulfillment Costs [Member]
Contract Asset [Roll Forward]
Capitalized contract cost, net, beginning balance	8	14.5	17.5
Capitalized contract cost, Additions	3.6	3.6	9.9
Capitalized contract cost, Amortization	(8.1)	(10.1)	(12.9)
Capitalized contract cost, net, ending Balance	3.5	8	14.5
Entertainment and Communications [Member] | Cost of Acquisition [Member]
Contract Asset [Roll Forward]
Capitalized contract cost, net, beginning balance	14.8	13	11.6
Capitalized contract cost, Additions	9.4	10	7.9
Capitalized contract cost, Amortization	(8.4)	(8.2)	(6.5)
Capitalized contract cost, net, ending Balance	15.8	14.8	13
IT Services and Hardware [Member]
Contract Asset [Roll Forward]
Capitalized contract cost, net, beginning balance	6.4	4.5	3.3
Capitalized contract cost, Additions	5.7	5.1	3.6
Capitalized contract cost, Amortization	(4.6)	(3.2)	(2.4)
Capitalized contract cost, net, ending Balance	7.5	6.4	4.5
IT Services and Hardware [Member] | Fulfillment Costs [Member]
Contract Asset [Roll Forward]
Capitalized contract cost, net, beginning balance	4.1	2.5	2
Capitalized contract cost, Additions	2.2	3.5	1.9
Capitalized contract cost, Amortization	(2.4)	(1.9)	(1.4)
Capitalized contract cost, net, ending Balance	3.9	4.1	2.5
IT Services and Hardware [Member] | Cost of Acquisition [Member]
Contract Asset [Roll Forward]
Capitalized contract cost, net, beginning balance	2.3	2	1.3
Capitalized contract cost, Additions	3.5	1.6	1.7
Capitalized contract cost, Amortization	(2.2)	(1.3)	(1)
Capitalized contract cost, net, ending Balance	$ 3.6	$ 2.3	$ 2

Revenue - Schedule of Revenues

Revenue - Schedule of Revenues Disaggregation by Product and Service Lines (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Revenues	$ 410.3	$ 389.5	$ 380	$ 380	$ 390.4	$ 382.5	$ 384.2	$ 379.6	$ 1,559.8	$ 1,536.7	$ 1,378.2
Operating Segments [Member] | Entertainment and Communications [Member]
Disaggregation Of Revenue [Line Items]
Revenues									969.6	995.7	853.4
Operating Segments [Member] | IT Services and Hardware [Member]
Disaggregation Of Revenue [Line Items]
Revenues									616.6	567.4	550.9
Intersegment Eliminations [Member]
Disaggregation Of Revenue [Line Items]
Revenues									(26.4)	(26.4)	(26.1)
Intersegment Eliminations [Member] | Entertainment and Communications [Member]
Disaggregation Of Revenue [Line Items]
Revenues									19.7	21.6	22.3
Intersegment Eliminations [Member] | IT Services and Hardware [Member]
Disaggregation Of Revenue [Line Items]
Revenues									6.7	4.8	3.8
Data [Member] | Operating Segments [Member] | Entertainment and Communications [Member]
Disaggregation Of Revenue [Line Items]
Revenues									479.4	475	402.6
Video [Member] | Operating Segments [Member] | Entertainment and Communications [Member]
Disaggregation Of Revenue [Line Items]
Revenues									193.8	203	183.3
Voice [Member] | Operating Segments [Member] | Entertainment and Communications [Member]
Disaggregation Of Revenue [Line Items]
Revenues									262.8	284.9	244.9
Other [Member] | Operating Segments [Member] | Entertainment and Communications [Member]
Disaggregation Of Revenue [Line Items]
Revenues									33.6	32.8	22.6
Consulting [Member] | Operating Segments [Member] | IT Services and Hardware [Member]
Disaggregation Of Revenue [Line Items]
Revenues									196	152.6	138.7
Cloud [Member] | Operating Segments [Member] | IT Services and Hardware [Member]
Disaggregation Of Revenue [Line Items]
Revenues									86.2	92.1	98
Communications [Member] | Operating Segments [Member] | IT Services and Hardware [Member]
Disaggregation Of Revenue [Line Items]
Revenues									215	198.7	178.5
Infrastructure Solutions [Member] | Operating Segments [Member] | IT Services and Hardware [Member]
Disaggregation Of Revenue [Line Items]
Revenues									$ 119.4	$ 124	$ 135.7

Revenue - Schedule of Revenue_2

Revenue - Schedule of Revenues Disaggregation by Contract Type (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Revenues	$ 410.3	$ 389.5	$ 380	$ 380	$ 390.4	$ 382.5	$ 384.2	$ 379.6	$ 1,559.8	$ 1,536.7	$ 1,378.2
Intersegment Eliminations [Member]
Disaggregation Of Revenue [Line Items]
Revenues									(26.4)	(26.4)	(26.1)
Transferred at Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenues									155.8	170.4	168.2
Transferred over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenues									1,404	1,366.3	1,210
Entertainment and Communications [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues									969.6	995.7	853.4
Entertainment and Communications [Member] | Intersegment Eliminations [Member]
Disaggregation Of Revenue [Line Items]
Revenues									19.7	21.6	22.3
Entertainment and Communications [Member] | Transferred at Point in Time [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues									27.9	31.7	25.3
Entertainment and Communications [Member] | Transferred over Time [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues									922	942.4	805.8
IT Services and Hardware [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues									616.6	567.4	550.9
IT Services and Hardware [Member] | Intersegment Eliminations [Member]
Disaggregation Of Revenue [Line Items]
Revenues									6.7	4.8	3.8
IT Services and Hardware [Member] | Transferred at Point in Time [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues									127.9	138.7	142.9
IT Services and Hardware [Member] | Transferred over Time [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues									$ 482	$ 423.9	$ 404.2

Mergers and Acquisitions - Narr

Mergers and Acquisitions - Narratives (Details) $ / shares in Units, shares in Millions	Mar. 13, 2020USD ($)$ / shares	Jul. 02, 2018USD ($)$ / sharesshares	Nov. 30, 2020USD ($)	Dec. 31, 2020USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Sep. 30, 2018shares	Dec. 31, 2020USD ($)mi	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Mar. 05, 2020$ / shares	Oct. 06, 2017
Business Acquisition [Line Items]
Fiber route miles | mi													17,800
Cash previously restricted to fund interest payments		$ 16,500,000
Revolving credit facility													$ 60,200,000	$ (6,100,000)	$ 194,600,000
Common shares issued as stock consideration | shares												7.7
Expenses related to acquisition				$ 1,200,000	$ 2,200,000	$ 2,500,000	$ 29,100,000	$ 9,000,000	$ 200,000	$ 600,000	$ 3,000,000		35,000,000	12,800,000	22,500,000
Revenues				410,300,000	389,500,000	380,000,000	380,000,000	390,400,000	382,500,000	384,200,000	379,600,000		1,559,800,000	1,536,700,000	1,378,200,000
Net income				(5,600,000)	$ (8,200,000)	$ (7,800,000)	(34,000,000)	(20,600,000)	$ (13,600,000)	$ (5,500,000)	$ (26,900,000)		$ (55,600,000)	$ (66,600,000)	(69,800,000)
Preferred Stock, Dividend Rate, Percentage													6.75%	6.75%
8% Senior Notes due 2025 [Member]
Business Acquisition [Line Items]
Senior notes		350,000,000		$ 350,000,000				350,000,000					$ 350,000,000	$ 350,000,000
Debt instrument, interest rate, stated percentage				8.00%									8.00%				8.00%
Senior Notes due 2024 [Member]
Business Acquisition [Line Items]
Senior notes				$ 625,000,000				$ 625,000,000					$ 625,000,000	$ 625,000,000
Debt instrument, interest rate, stated percentage				7.00%				7.00%					7.00%	7.00%
Senior Notes Due 2025 [Member]
Business Acquisition [Line Items]
Debt instrument, interest rate, stated percentage				8.00%									8.00%
Senior Notes due 2023 [Member]
Business Acquisition [Line Items]
Senior notes				$ 22,300,000				$ 22,300,000					$ 22,300,000	$ 22,300,000
Debt instrument, interest rate, stated percentage				7.25%									7.25%
Senior Notes due 2023 [Member] | Cincinnati Bell Inc. [Member]
Business Acquisition [Line Items]
Debt instrument, interest rate, stated percentage				7.25%									7.25%
Senior Notes Due 2028 [Member] | Cincinnati Bell Telephone Company LLC (CBT) [Member]
Business Acquisition [Line Items]
Debt instrument, interest rate, stated percentage				6.30%									6.30%
Hawaiian Telcom Holdco, Inc. [Member]
Business Acquisition [Line Items]
Cash consideration		218,300,000
Stock consideration		121,200,000
Debt repayments, including accrued interest		$ 318,200,000
Common shares issued as stock consideration | shares		7.7
Common shares price per share as stock consideration | $ / shares		$ 15.70
Expenses related to acquisition		$ 28,100,000												$ 900,000	19,200,000
Revenues															175,000,000
Net income															$ 700,000
Aggregate purchase price		339,500,000
Hawaiian Telcom Holdco, Inc. [Member] | Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Revolving credit facility		35,000,000
Hawaiian Telcom Holdco, Inc. [Member] | Accounts Receivable Securitization Facility [Member]
Business Acquisition [Line Items]
Revolving credit facility		$ 154,000,000
Brookfield Infrastructure Group [Member]
Business Acquisition [Line Items]
Common shares price per share as stock consideration | $ / shares																$ 14.50
Termination fee	$ 24,800,000						$ 24,800,000
MIP Merger [Member]
Business Acquisition [Line Items]
Common shares price per share as stock consideration | $ / shares	$ 15.50
MIP Merger [Member] | Senior Notes due 2024 [Member]
Business Acquisition [Line Items]
Aggregate cash payment on pro rata basis													$ 2,812,500
MIP Merger [Member] | Senior Notes Due 2025 [Member]
Business Acquisition [Line Items]
Aggregate cash payment on pro rata basis													1,050,000
Paniolo Acquisition [Member]
Business Acquisition [Line Items]
Cash consideration			$ 25,000,000
Aggregate purchase price			50,000,000
Business combination, committed purchase amount			$ 25,000,000
Funded to escrow account													$ 5,000,000

Mergers and Acquisitions - Sche

Mergers and Acquisitions - Schedule of Consideration (Details) - Hawaiian Telcom Holdco, Inc. [Member] $ in Millions	Jul. 02, 2018USD ($)
Business Acquisition [Line Items]
Cash consideration plus debt assumed	$ 536.5
Cash consideration	218.3
Cincinnati Bell Inc. stock issued	121.2
Debt repayment	(318.2)
Total purchase price	$ 339.5

Mergers and Acquisitions - Purc

Mergers and Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jul. 02, 2018
Assets acquired
Goodwill	$ 161.5	$ 160.5	$ 157
Hawaiian Telcom Holdco, Inc. [Member]
Assets acquired
Cash				$ 4.3
Receivables				24.8
Inventory, materials and supplies				6.7
Prepaid expenses and other current assets				5.9
Property, plant and equipment				697.6
Goodwill				10.2
Intangible assets				52
Deferred income tax asset				45.6
Other noncurrent assets				2.1
Total assets acquired				849.2
Liabilities assumed
Accounts payable				60
Current portion of long-term debt				10.2
Unearned revenue and customer deposits				13.5
Accrued expenses and other current liabilities				21.8
Long-term debt, less current portion				304.5
Pension and postretirement benefit obligations				68.9
Other noncurrent liabilities				30.8
Total liabilities assumed				509.7
Net assets acquired				$ 339.5

Mergers and Acquisitions - Esti

Mergers and Acquisitions - Estimated Fair Value of Identifiable Intangible Assets and Estimated Useful Lives (Details) - USD ($) $ in Millions	Jul. 02, 2018	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Fair Value		$ 193.2	$ 192
Hawaiian Telcom Holdco, Inc. [Member]
Business Acquisition [Line Items]
Fair Value	$ 52
Customer relationships
Business Acquisition [Line Items]
Fair Value		141.6	140.8
Customer relationships | Hawaiian Telcom Holdco, Inc. [Member]
Business Acquisition [Line Items]
Fair Value	$ 26
Useful Lives	15 years
Trade name
Business Acquisition [Line Items]
Fair Value		$ 41.7	$ 41.3
Trade name | Hawaiian Telcom Holdco, Inc. [Member]
Business Acquisition [Line Items]
Fair Value	$ 26
Useful Lives	15 years

Mergers and Acquisitions - Pro

Mergers and Acquisitions - Pro Forma Information (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)$ / shares
Business Combinations [Abstract]
Revenue	$ 1,556.5
Net loss applicable to common shareholders	$ (77.2)
Earnings per share:
Basic and diluted loss per common share | $ / shares	$ (1.54)

Earnings Per Common Share - Com

Earnings Per Common Share - Computation of Basis and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerator:
Net loss	$ (5.6)	$ (8.2)	$ (7.8)	$ (34)	$ (20.6)	$ (13.6)	$ (5.5)	$ (26.9)	$ (55.6)	$ (66.6)	$ (69.8)
Preferred stock dividends									10.4	10.4	10.4
Net loss applicable to common shareowners - basic and diluted									$ (66)	$ (77)	$ (80.2)
Denominator:
Weighted-average common shares outstanding - basic									50.6	50.4	46.3
Stock-based compensation arrangements									0	0	0
Weighted-average common shares outstanding - diluted									50.6	50.4	46.3
Basic and diluted net loss per common share	$ (0.16)	$ (0.21)	$ (0.21)	$ (0.72)	$ (0.46)	$ (0.32)	$ (0.16)	$ (0.59)	$ (1.30)	$ (1.53)	$ (1.73)

Earnings Per Common Share - Nar

Earnings Per Common Share - Narratives (Details) - shares shares in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares issued as stock consideration	7.7
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	0.1
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount		0.9	0.9	0.9

Property, Plant and Equipment -

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Land and rights-of-way	$ 115.7	$ 117.2
Buildings and leasehold improvements	323.8	315.4
Network equipment	4,180	4,044.6
Office software, furniture, fixtures and vehicles	243.7	229.3
Construction in process	60.4	38.9
Gross value	4,923.6	4,745.4
Accumulated depreciation	(3,194.5)	(2,964.6)
Property, plant and equipment, net	$ 1,729.1	$ 1,780.8
Land [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Land [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	Indefinite
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	50 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	14 years

Property, Plant and Equipment_2

Property, Plant and Equipment - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Depreciation	$ 279,000,000	$ 290,200,000	$ 239,600,000
Depreciation associated with cost of providing services	86.00%	87.00%	85.00%
Asset impairment losses	$ 0	$ 0	$ 0
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Majority	7 years
Property, Plant and Equipment, Useful Life	2 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Majority	25 years
Property, Plant and Equipment, Useful Life	50 years

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 160.5	$ 157
Adjustments to prior year acquisitions	0	1.4
Currency translations	1	2.1
Goodwill, ending balance	161.5	160.5
IT Services and Hardware [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	148.1	146
Adjustments to prior year acquisitions	0	0
Currency translations	1	2.1
Goodwill, ending balance	149.1	148.1
Entertainment and Communications [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	12.4	11
Adjustments to prior year acquisitions	0	1.4
Currency translations	0	0
Goodwill, ending balance	$ 12.4	$ 12.4

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Narrative (Details)	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2020License
Goodwill And Intangible Assets Disclosure [Abstract]
Impairment losses recognized in goodwill	$ 0	$ 0	$ 0
Number of wireless spectrum licenses | License				56
Amortization of finite-lived intangible assets	14,400,000	14,700,000	12,400,000
Impairment of intangible assets, finite-lived	$ 0	$ 0	$ 0

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	$ 193.2	$ 192
Accumulated amortization	(51.5)	(36.6)
Intangible assets subject to amortization, net amount	141.7	155.4
Intangible assets, gross carrying amount	199.6	192
Intangible assets, net amount	148.1	155.4
FCC Licenses and Spectrum Usage Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	6.4
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	141.6	140.8
Accumulated amortization	(38.9)	(28.4)
Intangible assets subject to amortization, net amount	102.7	112.4
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	41.7	41.3
Accumulated amortization	(9.4)	(6)
Intangible assets subject to amortization, net amount	32.3	35.3
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	9.9	9.9
Accumulated amortization	(3.2)	(2.2)
Intangible assets subject to amortization, net amount	$ 6.7	$ 7.7

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Schedule of Estimated Useful Lives for Finite-Lived Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2020
Customer relationships | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	8 years
Customer relationships | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Trade name | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Trade name | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Technology
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years

Goodwill and Intangible Asset_6

Goodwill and Intangible Assets - Schedule of Estimated Amortization Expense (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2021	$ 14.3
2022	14.1
2023	13.7
2024	13.5
2025	13.3
Thereafter	72.8
Intangible assets subject to amortization, net amount	$ 141.7	$ 155.4

Debt and Other Financing Arra_3

Debt and Other Financing Arrangements - Schedule of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Jul. 02, 2018
Debt Instrument [Line Items]
Current portion of long-term debt	$ 21.8	$ 22.3
Other Financing Arrangements, Current Portion	1.9	2
Finance lease liabilities, current	13.9	14.3
Receivables Facility	182	131.5
Credit Agreement - Revolving Credit Facility	67	57
Long-term debt, less current portion	1,949.9	1,901.3
Other Financing Arrangements, Non-Current Portion	0.9	3.2
Finance lease liabilities, Noncurrent	52.1	59.5
Long-term debt gross	1,967.7	1,922.9
Net unamortized premium	1.1	1.3
Unamortized note issuance costs	(18.9)	(22.9)
Total debt	1,971.7	1,923.6
Tranche B Term Loan due 2024 [Member]
Debt Instrument [Line Items]
Current portion of long-term debt	6	6
Long-term debt, less current portion	580.5	586.5
Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Senior Notes, Noncurrent	22.3	22.3
Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Senior Notes, Noncurrent	625	625
8% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Senior Notes, Noncurrent	350	350	$ 350
Various Cincinnati Bell Telephone Notes [Member]
Debt Instrument [Line Items]
Long-term debt, less current portion	$ 87.9	$ 87.9

Debt and Other Financing Arra_4

Debt and Other Financing Arrangements - Schedule of Debt (Parenthetical) (Details)	Dec. 31, 2020	Dec. 31, 2019	Oct. 06, 2017
Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	7.25%
Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	7.00%	7.00%
8% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	8.00%		8.00%

Debt and Other Financing Arra_5

Debt and Other Financing Arrangements - Credit Agreement - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Oct. 02, 2017
Debt Instrument [Line Items]
Credit agreement term				5 years
Line of Credit Facility, Maximum Borrowing Capacity					$ 200,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.50%
Line of Credit Facility, Commitment Fee Percentage	0.375%
Line Of Credit Facility, Fronting Fee Percentage	0.125%
Long-term Line of Credit	$ 67,000,000	$ 57,000,000
Borrowing capacity	133,000,000
Loss on extinguishment of debt, net	$ 0	$ 0	$ 1,300,000
Debt Covenants [Abstract]
Minimum consolidated interest coverage ratio	150.00%
Equity Interests in Foreign Subsidiaries	66.00%
Maximum [Member]
Debt Instrument [Line Items]
Leverage Ratio, threshold	325.00%
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.25%				3.75%
Debt Instrument, Basis Spread on Variable Rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	1.00%
Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	2.25%				2.75%
Bridge Loan [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 25,000,000
Tranche B Term Loan due 2024 [Member]
Debt Instrument [Line Items]
Credit agreement term				7 years
Debt Instrument, Face Amount					600,000,000
Debt instrument expiration date	2024-10
Tranche B Term Loan due 2024 [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 30,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument expiration date	2022-10
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage Ratio, threshold	350.00%

Debt and Other Financing Arra_6

Debt and Other Financing Arrangements - Accounts Receivable Securitization Facility - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2020
Debt Instrument [Line Items]
Accounts Receivable Facility, Renewal Term	364 days
Receivables facility maximum borrowing capacity	$ 200,000,000		$ 225,000,000
Receivables Facility Maximum Borrowing Availability	200,000,000
Receivables Facility	182,000,000	$ 131,500,000
Letters of Credit Outstanding, Amount	13,900,000
Receivables Facility Remaining Borrowing Capacity	$ 4,100,000
Debt Instrument, Interest Rate During Period	2.30%
Accounts receivable sold	$ 0	$ 44,700,000
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Receivables Facilities [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.20%
Receivables Facilities [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.75%

Debt and Other Financing Arra_7

Debt and Other Financing Arrangements - Notes due - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2020	Dec. 31, 1993	Dec. 31, 2019	Oct. 06, 2017
Debt Instrument [Line Items]
Debt instrument maturity period			2028
Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt				$ 50
Debt instrument, interest rate, stated percentage			7.25%
Debt instrument maturity period			2023
Frequency of periodic interest payment			Interest on the 7 1/4% Notes is payable semi-annually on June 15 and December 15.
Debt instrument, collateral terms			The Company expects to enter into new senior secured credit facilities upon the consummation of the MIP acquisition. Upon such consummation, the 7 1/4% Notes will be equally and ratably secured with the collateral granted by the Company (but not its subsidiaries) to secure the new senior secured credit facilities. Additionally, in connection with the 2024 Notes Consent Solicitation and the 2025 Notes Consent Solicitation described below, the Company has agreed to secure the 7% Senior Notes and the 8% Senior Notes on a pari-passu basis with the new senior secured credit facilities upon the consummation of the MIP acquisition, such that at such time, the 7% Senior Notes and the 8% Senior Notes will also become secured equally and ratably by the collateral granted by the Company to secure the 7¼% Notes.
Customary Events of Default Amount for Existing Debt Instruments			$ 20
Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 200	$ 425
Debt instrument, interest rate, stated percentage			7.00%		7.00%
Frequency of periodic interest payment			The 7% Senior Notes bear interest at a rate of 7% per annum, payable semi-annually on January 15 and July 15 of each year, beginning on January 15, 2017, to persons who are registered holders of the 7% Senior Notes on the immediately preceding January 1 and July 1, respectively.
Debt instrument, collateral terms			Company, the subsidiary guarantors and the Trustee agreed to further amend the 2024 Notes Indenture effective concurrently with the consummation of the MIP Acquisition to: (i) secure the 7% Senior Notes and the related guarantees on a pari-passu basis with the 8% Senior Notes and the senior secured credit facilities (subject to certain exceptions) expected to be entered into in connection with the MIP acquisition, and (ii) add a covenant to the 2024 Notes Indenture that restricts the Company from redeeming all or part of the applicable series of 7% Senior Notes under Section 3.07 of the 2024 Notes Indenture prior to September 15, 2021. These further provisions will only be operative upon consummation of the MIP acquisition and subject to certain other conditions. Any collateral granted by the Company (but not its subsidiaries) to secure the 7% Senior Notes will also secure the Issuer’s 7.25% Senior Notes due 2023 and any collateral granted by the Company’s subsidiary Cincinnati Bell Telephone Company LLC (“CBT”) to secure the 7% Senior Notes will also secure CBT’s 6.30% Senior Notes due 2028, in each case on an equal and ratable basis.
Customary Events of Default Amount for Existing Debt Instruments			$ 35
Issuance of Long-Term Debt, Original Issue Premium, Percentage	105.00%
Debt instrument maturity date			Jul. 15, 2024
Debt instrument, solicited consent description			Company solicited consents from the holders of the 7% Senior Notes (the “2024 Notes Consent Solicitation”) to amend the 2024 Notes Indenture to (i) amend the definition of “Change of Control” so that MIP’s acquisition of the Company would not constitute a Change of Control and (ii) add a definition of, and designate certain persons, including MIP and its affiliates and Ares Management Corporation and its affiliates as, “Permitted Holders” of the 7% Senior Notes. On July 2, 2020, the Company received the requisite consents from the holders of the 7% Senior Notes, and accordingly, the Company, together with the subsidiary guarantors, entered into the Sixth Supplemental Indenture with the Trustee to give effect to foregoing amendments effective concurrently with the consummation of the MIP Acquisition.
Senior Notes due 2024 [Member] | Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage			103.50%
Senior Notes due 2024 [Member] | Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage			101.75%
Senior Notes due 2024 [Member] | Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage			100.00%
8% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			8.00%			8.00%
Frequency of periodic interest payment			The 8% Senior Notes bear interest at a rate of 8.00% per annum, payable semi-annually on April 15 and October 15 of each year, beginning on April 15, 2018, to persons who are registered holders of the 8% Senior Notes on the immediately preceding April 1 and October 1, respectively.
Debt instrument, collateral terms			Company, the subsidiary guarantors and the Trustee agreed to further amend the 2025 Notes Indenture effective concurrently with the consummation of the MIP Acquisition to: (i) secure the 8% Senior Notes and the related guarantees on a pari-passu basis with the 7% Senior Notes and the senior secured credit facilities (subject to certain exceptions) expected to be entered into in connection with the MIP acquisition, and (ii) add a covenant to the 2025 Notes Indenture that restricts the Company from redeeming all or part of the applicable series of 8% Senior Notes under Section 3.07 of the 2025 Notes Indenture prior to October 15, 2021. These further provisions will only be operative upon consummation of the MIP acquisition and subject to certain other conditions. Any collateral granted by the Company (but not its subsidiaries) to secure the 8% Senior Notes will also secure the Issuer’s 7.25% Senior Notes due 2023 and any collateral granted by the Company’s subsidiary CBT to secure the 8% Senior Notes will also secure CBT’s 6.30% Senior Notes due 2028, in each case on an equal and ratable basis.
Debt instrument maturity date			Oct. 15, 2025
Debt instrument, solicited consent description			Company solicited consents from the holders of the 8% Senior Notes (the “2025 Notes Consent Solicitation”) to amend the 2025 Notes Indenture to (i) amend the definition of “Change of Control” so that MIP’s acquisition of the Company would not constitute a Change of Control and (ii) add a definition of, and designate certain persons, including MIP and its affiliates and Ares Management Corporation and its affiliates as, “Permitted Holders” of the 8% Senior Notes. On July 2, 2020, the Company received the requisite consents from the holders of the 8% Senior Notes, and accordingly, the Company together with its subsidiary guarantors entered into the Second Supplemental Indenture with the Trustee to give effect to foregoing amendments effective concurrently with the consummation of the MIP Acquisition.
Debt Instrument, Face Amount						$ 350
8% Senior Notes due 2025 [Member] | Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage			106.00%
8% Senior Notes due 2025 [Member] | Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage			104.00%
8% Senior Notes due 2025 [Member] | Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage			102.00%
8% Senior Notes due 2025 [Member] | Debt Instrument, Redemption, Period Five [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage			100.00%

Debt and Other Financing Arra_8

Debt and Other Financing Arrangements - Cincinnati Bell Telephone Notes - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 1998	Dec. 31, 2020
Debt Instrument [Line Items]
Debt instrument maturity period		2028
Cincinnati Bell Telephone Senior Notes due 2028 [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Unsecured Debt	$ 150
Debt instrument, interest rate, stated percentage		6.30%
Customary Events of Default Amount for Existing Debt Instruments		$ 20
Debt instrument, collateral terms		Company expects to enter into new senior secured credit facilities upon the consummation of the MIP acquisition, such that the new senior secured credit facilities will be equally and ratably secured with the collateral granted by CBT to secure the CBT Notes. Additionally, in connection with the 2024 Notes Consent Solicitation and the 2025 Notes Consent Solicitation, the Company has agreed to secure the 7% Senior Notes and the 8% Senior Notes on a pari-passu basis with the new senior secured credit facilities upon the consummation of the MIP acquisition, such that at such time, the 7% Senior Notes and the 8% Senior Notes will also become secured equally and ratably by the collateral granted by CBT to secure the CBT Notes.

Debt and Other Financing Arra_9

Debt and Other Financing Arrangements - Debt Maturity Schedule (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
2021	$ 6
2022	73
2023	210.3
2024	1,193.5
2025	350
Thereafter	87.9
Long-Term Debt, Excluding Finance Leases, Gross	1,920.7
Net unamortized premium	1.1	$ 1.3
Unamortized note issuance costs	(18.9)	$ (22.9)
Total debt	1,902.9
2021	1.9
2022	0.5
2023	0.4
2024	0
2025	0
Thereafter	0
Other Financing Arrangements, Gross	2.8
Other Financing Arrangements, Net unamortized premium	0
Other Financing Arrangements, Unamortized note issuance costs	0
Other Financing Arrangements, Net	$ 2.8

Debt and Other Financing Arr_10

Debt and Other Financing Arrangements - Debt Maturity Schedule, Deferred Financing Costs, Debt Covenants and Extinguished Notes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Payments of debt issuance costs	$ 0.7	$ 0.8	$ 11.7
Write off of Deferred Debt Issuance Cost			1.3
Unamortized note issuance costs	18.9	22.9
Amortization of Debt Issuance Costs	$ 5.9	6.4	$ 5.7
Consolidated total leverage ratio, maximum allowed under Line of Credit Facility	350.00%
Minimum consolidated interest coverage ratio	150.00%
Other Noncurrent Assets [Member]
Debt Instrument [Line Items]
Unamortized note issuance costs	$ 2	3.1
Revolving Credit Facility and Receivables Facility [Member]
Debt Instrument [Line Items]
Payments of debt issuance costs	$ 0.4	$ 0.8

Leases - Narratives (Details)

Leases - Narratives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2021	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Lessee operating and finance lease term of contract	5 years
Lease expiration period	2066
Lessee, operating lease, existence of option to extend	true
Lessee, finance lease, renewal term	15 years
Lessee, operating lease, existence of option to terminate	true
Lease expense			$ 18.4
Additional operating lease for building not yet commenced	$ 1.1
Operating lease term	10 years
Operating lease right-of-use assets	$ 37.4	$ 35.8			$ 38.3
Lease income	2.9	$ 3.1
Hawaiian Telcom Holdco, Inc. [Member]
Lessee, Lease, Description [Line Items]
Sale leaseback transaction value	3.7
Net proceeds from sale-leaseback transaction after transaction cost	$ 3.5
Hawaiian Telcom Holdco, Inc. [Member] | Subsequent Event [Member]
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets				$ 1.1
Operating lease right of use liability				$ 1.1
Minimum [Member]
Lessee, Lease, Description [Line Items]
Operating lease term	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Operating lease term	30 years
Real Estate | Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee operating and finance lease term of contract	1 year
Real Estate | Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee operating and finance lease term of contract	55 years
Equipment [Member] | Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee operating and finance lease term of contract	3 years
Equipment [Member] | Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee operating and finance lease term of contract	6 years
Cell Towers [Member] | Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee operating and finance lease term of contract	4 years
Cell Towers [Member] | Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee operating and finance lease term of contract	21 years

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease assets, net of amortization	$ 37.4	$ 35.8	$ 38.3
Finance lease assets, net of amortization	$ 28	33.2
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet
Current operating lease liabilities	$ 9.6	10.9
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Noncurrent operating lease liabilities	$ 33.6	32.1	$ 46.2
Total operating lease liabilities	43.2	43
Current finance lease liabilities	$ 13.9	14.3
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
Noncurrent finance lease liabilities	$ 52.1	59.5
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligations
Total finance lease liabilities	$ 66	$ 73.8

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 13	$ 13.2
Short-term lease cost	0.3	0.3
Variable lease cost	2.6	2.1
Finance lease cost:
Depreciation on leased assets	7	8.3
Interest on lease liabilities	4.5	5.1
Total lease cost	$ 27.4	$ 29

Leases - Schedule of Other Info

Leases - Schedule of Other Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$ 4.4	$ 5.1
Operating cash flows from operating leases	12.1	11
Financing cash flows from finance leases	16.6	14.4
Right-of-use assets obtained in exchange for lease obligations:
New operating leases	12.6	7.5
New finance leases	$ 7.7	$ 14.5
Weighted Average Remaining Lease Term
Operating leases	7 years 4 months 6 days	7 years 11 months 4 days
Finance leases	6 years 10 months 17 days	7 years 2 months 12 days
Weighted Average Discount Rate
Operating leases	5.42%	6.94%
Finance leases	7.08%	7.00%

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments Under Non-Cancellable Leases (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Operating Leases [Abstract]
2021	$ 11.7
2022	8.7
2023	7.3
2024	5.5
2025	4.3
Thereafter	17.2
Total future minimum lease payments	54.7
Less imputed interest	(10.4)
Total	44.3
Finance Leases [Abstract]
2021	17.5
2022	12.7
2023	9.2
2024	8.4
2025	7.4
Thereafter	29.5
Total future minimum lease payments	84.7
Less imputed interest	(18.7)
Total	$ 66	$ 73.8

Leases - Schedule of Future M_2

Leases - Schedule of Future Minimum Lease Payments to be Received under Non-Cancellable Leases (Details) $ in Millions	Dec. 31, 2020USD ($)
Lessor, Operating leases [Abstract]
2021	$ 2.4
2022	1.9
2023	1.8
2024	1.8
2025	1.7
Thereafter	15.4
Total future minimum lease payments	25
Less imputed interest	(8.8)
Total	$ 16.2

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details)	12 Months Ended
	Dec. 31, 2020USD ($)RenewalOption	Dec. 31, 2019USD ($)
Commitments And Contingencies [Line Items]
Other current liabilities	$ 50,900,000	$ 52,600,000
Other noncurrent liabilities	82,300,000	71,700,000
Jointly Owned Utility Plant Aggregate Construction Cost	235,000,000
Jointly Owned Utility Plant Amount Paid For Cable Build	$ 700,000	400,000
Up-Front Payments For Services, Upper Range, Years	25 years
Proceeds from sale of capacity, recorded in other noncurrent liabilities	$ 20,800,000	21,300,000
Proceeds from sale of capacity, recorded in other current liabilities	1,300,000	1,200,000
Letters of Credit Outstanding, Amount	13,900,000
Indemnification liability	$ 0	0
Maximum [Member]
Commitments And Contingencies [Line Items]
SEA-US contract term	25 years
Long-term Purchase Commitments, Period	3 years
Minimum [Member]
Commitments And Contingencies [Line Items]
SEA-US contract term	15 years
Long-term Purchase Commitments, Period	1 year
Pole license agreement obligation [Member]
Commitments And Contingencies [Line Items]
Contract Term, in Years	10 years
Number of renewal options | RenewalOption	2
Renewal option term	5 years
Other installment financing arrangements	$ 38,000,000	39,100,000
Other current liabilities	$ 1,300,000	1,100,000
Data Center Financing Arrangements [Member]
Commitments And Contingencies [Line Items]
Contract Term, in Years	10 years
Number of renewal options | RenewalOption	2
Renewal option term	2 years
Other installment financing arrangements	$ 4,100,000	$ 4,400,000
Other current liabilities	400,000
Other noncurrent liabilities	$ 3,700,000

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Future Minimum Payments Under Base Arrangements and Renewal Options (Details) $ in Millions	Dec. 31, 2020USD ($)
Commitments And Contingencies Disclosure [Abstract]
2021	$ 0.8
2022	3.5
2023	5.8
2024	5.8
2025	5.8
Thereafter	52
Total future minimum financing obligation payments	73.7
Less imputed interest	(33.5)
Total	$ 40.2

Commitments and Contingencies_3

Commitments and Contingencies - Schedule of Change in Asset Retirement Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation [Abstract]
Balance, beginning of period	$ 7.1	$ 9.1
Hawaiian Telcom opening balance sheet adjustment	0	(3.2)
Liabilities incurred	0	1.8
Liabilities settled	(0.6)	(0.7)
Accretion expense	0.2	0.1
Balance, end of period	$ 6.7	$ 7.1

Financial Instruments and Fai_3

Financial Instruments and Fair Value Measurements - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Jun. 30, 2018	Dec. 31, 2020	Dec. 31, 2019
2.938% Interest Rate Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount		$ 300,000,000
Average fixed interest rate		2.938%
Interest rate swap expiration date		2023-06
2.275% Interest Rate Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount	$ 89,000,000
Average fixed interest rate	2.275%
Interest rate swap expiration date	2024-03
2.244% Interest Rate Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount	$ 89,000,000
Average fixed interest rate	2.244%
Interest rate swap expiration date	2024-03
2.328% Interest Rate Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount	$ 89,000,000
Average fixed interest rate	2.328%
Interest rate swap expiration date	2024-03
Interest Rate Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimates in reclassified an increase to interest expense			$ 9,300,000
Interest Rate Contract [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of interest rate swaps			$ 25,400,000	$ 19,000,000

Financial Instruments and Fai_4

Financial Instruments and Fair Value Measurements - Schedule of Fair Value of Interest rate Swaps Recorded in Condensed Consolidated Balance Sheets (Details) - Estimate of Fair Value, Fair Value Disclosure [Member] - Interest Rate Contract [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Swap Liability, Current	$ 9.3	$ 5.7
Interest Rate Swap Liability, Noncurrent	16.1	13.3
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Swap Liability, Current	0	0
Interest Rate Swap Liability, Noncurrent	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Swap Liability, Current	9.3	5.7
Interest Rate Swap Liability, Noncurrent	16.1	13.3
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Swap Liability, Current	0	0
Interest Rate Swap Liability, Noncurrent	$ 0	$ 0

Financial Instruments and Fai_5

Financial Instruments and Fair Value Measurements - Amount of (Losses) Gains Recognized in Accumulated Other Comprehensive Income Net of Reclassification into Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Interest Rate Swap	$ (6.4)	$ (14)

Financial Instruments and Fai_6

Financial Instruments and Fair Value Measurements - Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Interest Rate Swap	$ (8.4)	$ (2.2)

Financial Instruments and Fai_7

Financial Instruments and Fair Value Measurements - Schedule of Carrying and Fair Values by Balance Sheet Grouping (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion	[1]	$ 1,921.8	$ 1,867.5
Other financing arrangements		42.1	43.5
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion	[1]	1,973.4	1,921.5
Other financing arrangements		$ 58.6	$ 55.5
[1]	Excludes finance leases, other financing arrangements and note issuance costs

Pension and Postretirement Pl_3

Pension and Postretirement Plans - Narratives (Details) $ in Millions		12 Months Ended
		Dec. 31, 2020USD ($)Plan	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Defined contribution plan, cost		$ 13.1	$ 12.9	$ 11.3
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Settlements	[1]	21.1	1
Settlements	[1]	21.1	1
Pension settlement charges		3.8	0	0.1
Pension Plans, Defined Benefit [Member] | Qualified Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Payment for Pension and Other Postretirement Benefits		5.5	3.6	9.3
Expected future employer contributions, next fiscal year		3
Pension Plans, Defined Benefit [Member] | Nonqualified Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Payment for Pension and Other Postretirement Benefits		2.2	2.3	2.3
Expected future employer contributions, next fiscal year		3
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Settlements	[1]	0	0
Settlements	[1]	0	0
Pension settlement charges		0	0	0
Expected future employer contributions, next fiscal year		$ 8
Cincinnati Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Number of noncontributory defined benefit pension plans | Plan		3
Cincinnati Plans [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Settlements		$ 6
Settlements		6
Pension settlement charges		2.3
Hawaii Plans [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Settlements		15.1	1	3.6
Settlements		15.1	$ 1	3.6
Pension settlement charges		$ 1.5		0.1
Hawaii Plans [Member] | Pension Plans, Defined Benefit [Member] | Qualified Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Payment for Pension and Other Postretirement Benefits				$ 5
Cincinnati and Hawaii Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Allocation percentage in united states based investments		50.00%
Cincinnati and Hawaii Plans [Member] | Equity Securities [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Target allocation, plan assets percentage		50.00%
Cincinnati and Hawaii Plans [Member] | Fixed Income Securities [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Target allocation, plan assets percentage		50.00%
[1]	The increase in pension plan settlements in 2020 increased due to participant elections to take lump sum payments upon termination as result of the voluntary severance program offered to employees in both Cincinnati and Hawaii. The extent of the funding exceeded the settlement accounting threshold, and as such in the year ended December 31, 2020, these activities have been categorized as settlements.

Pension and Postretirement Pl_4

Pension and Postretirement Plans - Schedule of Pension and Postretirement Benefit Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 0	$ 0	$ 0
Interest cost on projected benefit obligation	18.8	23.9	20
Expected return on plan assets	(29)	(30.7)	(29.8)
Amortization of:
Prior service benefit	0	0	0
Actuarial loss	18.1	13.7	17
Pension settlement charges	3.8	0	0.1
Pension/postretirement cost	11.7	6.9	7.3
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	0.4	0.6	0.6
Interest cost on projected benefit obligation	3.7	5	4.2
Expected return on plan assets	0	0	0
Amortization of:
Prior service benefit	(2.5)	(2.5)	(3.1)
Actuarial loss	1.2	1.8	4.1
Pension settlement charges	0	0	0
Pension/postretirement cost	$ 2.8	$ 4.9	$ 5.8

Pension and Postretirement Pl_5

Pension and Postretirement Plans - Assumptions (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cincinnati Plans [Member]
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Healthcare cost trend	6.50%	6.50%
Rate to which the cost trend is assumed to decline (ultimate trend rate)	4.50%	4.50%
Year the rates reach the ultimate trend rate	2025	2024
Cincinnati Plans [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.10%	4.20%	3.60%
Expected long-term rate of return	6.00%	6.50%	7.00%
Cash balance interest credit rate	4.00%	4.00%	4.00%
Future compensation growth rate	0.00%	0.00%	0.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.40%	3.10%
Cash balance interest credit rate	4.00%	4.00%
Future compensation growth rate	0.00%	0.00%
Cincinnati Plans [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.20%	4.30%	3.60%
Expected long-term rate of return	0.00%	0.00%	0.00%
Cash balance interest credit rate	0.00%	0.00%	0.00%
Future compensation growth rate	0.00%	0.00%	0.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.40%	3.20%
Cash balance interest credit rate	0.00%	0.00%
Future compensation growth rate	0.00%	0.00%
Hawaii Plans [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.80%	4.20%	4.10%
Expected long-term rate of return	6.00%	6.50%	7.00%
Cash balance interest credit rate	2.00%	2.20%	3.10%
Future compensation growth rate	0.00%	0.00%	0.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.30%	3.10%
Cash balance interest credit rate	1.20%	2.30%
Future compensation growth rate	0.00%	0.00%
Hawaii Plans [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.30%	4.40%	4.20%
Expected long-term rate of return	0.00%	0.00%	0.00%
Cash balance interest credit rate	0.00%	0.00%	0.00%
Future compensation growth rate	0.00%	0.00%	0.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.60%	3.30%
Cash balance interest credit rate	0.00%	0.00%
Future compensation growth rate	0.00%	0.00%

Pension and Postretirement Pl_6

Pension and Postretirement Plans - Benefit Obligation and Funded Status (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at January 1,		$ 543.1
Fair value of plan assets at December 31,		573.7	$ 543.1
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at January 1,		652.9	606.8
Service cost		0	0	$ 0
Interest cost		18.8	23.9	20
Actuarial loss (gain)	[1],[2]	62.8	72.7
Benefits paid		(39.3)	(49.5)
Retiree drug subsidy received		0	0
Settlements	[3]	(21.1)	(1)
Other		0	0
Benefit obligation at December 31,		674.1	652.9	606.8
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at January 1,		538.8	482.4
Actual return on plan assets		84.5	101
Employer contributions		7.7	5.9
Retiree drug subsidy received		0	0
Benefits paid		(39.3)	(49.5)
Settlements	[3]	(21.1)	(1)
Fair value of plan assets at December 31,		570.6	538.8	482.4
Unfunded status		(103.5)	(114.1)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at January 1,		116.3	123.7	116.3
Service cost		0.4	0.6	0.6
Interest cost		3.7	5	4.2
Actuarial loss (gain)	[1],[2]	(3.5)	(5.1)
Benefits paid		(7.9)	(8.6)
Retiree drug subsidy received		0.1	0.1
Settlements	[3]	0	0
Other		0.5	0.6
Benefit obligation at December 31,		109.6	116.3	123.7
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at January 1,		4.3	5.8	4.3
Actual return on plan assets		0.1	0.3
Employer contributions		6.5	6.7
Retiree drug subsidy received		0.1	0.1
Benefits paid		(7.9)	(8.6)
Settlements	[3]	0	0
Fair value of plan assets at December 31,		3.1	4.3	$ 5.8
Unfunded status		$ (106.5)	$ (112)
[1]	The actuarial loss recorded during the periods ended December 31, 2020 and 2019 for the pension plans was primarily driven by changes in the discount rate as well as gains or losses to record pension assets to fair value.
[2]	The actuarial (gain) recorded for the period ending December 31, 2020 for the postretirement plans is primarily due to an updated participation assumption for the Hawaii plans for terminated vested participants as a result of an experience study completed in 2020 partially offset by changes to the discount rate for both plans. The actuarial (gain) recorded for the period ending December 31, 2019 is primarily due to updated participant assumptions for the Hawaii plans partially offset by changes to the discount rate and updated mortality tables.
[3]	The increase in pension plan settlements in 2020 increased due to participant elections to take lump sum payments upon termination as result of the voluntary severance program offered to employees in both Cincinnati and Hawaii. The extent of the funding exceeded the settlement accounting threshold, and as such in the year ended December 31, 2020, these activities have been categorized as settlements.

Pension and Postretirement Pl_7

Pension and Postretirement Plans - Amounts Recognized in Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Pension and postretirement benefit obligations (noncurrent liability)	$ 200.2	$ 215.5
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued payroll and benefits (current liability)	2.1	2.1
Pension and postretirement benefit obligations (noncurrent liability)	101.4	112
Total	103.5	114.1
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Prior service (cost) benefit, net of tax of ($0.1), ($0.1), $3.4, $4.0	(0.1)	(0.1)
Actuarial loss, net of tax of ($39.0), ($42.4), ($4.3), ($5.4)	(136.1)	(147.5)
Total	(136.2)	(147.6)
Prior service costs, tax	(0.1)	(0.1)
Actuarial loss, tax	(39)	(42.4)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued payroll and benefits (current liability)	8.5	9.5
Pension and postretirement benefit obligations (noncurrent liability)	98	102.5
Total	106.5	112
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Prior service (cost) benefit, net of tax of ($0.1), ($0.1), $3.4, $4.0	13.7	15.6
Actuarial loss, net of tax of ($39.0), ($42.4), ($4.3), ($5.4)	(16.3)	(20)
Total	(2.6)	(4.4)
Prior service costs, tax	3.4	4
Actuarial loss, tax	$ (4.3)	$ (5.4)

Pension and Postretirement Pl_8

Pension and Postretirement Plans - Amounts Recognized in AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Plans, Defined Benefit [Member]
Prior service cost recognized:
Reclassification adjustments	$ 0	$ 0
Actuarial (loss) gain recognized:
Reclassification adjustments	21.9	13.7
Actuarial (loss) gain arising during the period	(7.1)	(2.3)
Other Postretirement Benefits Plan [Member]
Prior service cost recognized:
Reclassification adjustments	(2.5)	(2.5)
Actuarial (loss) gain recognized:
Reclassification adjustments	1.2	1.8
Actuarial (loss) gain arising during the period	$ 3.6	$ 5.5

Pension and Postretirement Pl_9

Pension and Postretirement Plans - Fair Value of Pension Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 573.7	$ 543.1
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	570.6	538.8
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Equity Index Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	151.2	137.2
U.S. Equity Index Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	151.2	137.2
U.S. Equity Index Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Equity Index Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International Equity Index Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	152.4	137.4
International Equity Index Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	152.4	137.4
International Equity Index Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International Equity Index Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fixed Income Bond Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	265	263.7
Fixed Income Bond Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	265	263.7
Fixed Income Bond Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fixed Income Bond Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fixed Income Short-term Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	0.5
Fixed Income Short-term Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	0.5
Fixed Income Short-term Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fixed Income Short-term Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Group Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3.1	4.3
Group Insurance Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Group Insurance Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Group Insurance Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0

Pension and Postretirement P_10

Pension and Postretirement Plans - Expected Future Benefit Payments (Details) $ in Millions	Dec. 31, 2020USD ($)
Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt [Abstract]
2021	$ (0.2)
2022	(0.2)
2023	(0.1)
2024	(0.1)
2025	(0.1)
Years 2026 - 2030	(0.4)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021	55.3
2022	54.6
2023	51
2024	50
2025	49
Years 2026 - 2030	198.7
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021	8.7
2022	8.2
2023	7.8
2024	7.4
2025	7
Years 2026 - 2030	$ 30.6

Shareowners' Deficit - Narrativ

Shareowners' Deficit - Narratives (Details)	Jul. 02, 2018USD ($)shares	Dec. 31, 2020USD ($)$ / sharesshares	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)shares
Class of Stock [Line Items]
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.01	$ 0.01
Common Stock, Shares, Outstanding		50,680,605	50,420,700
Stock repurchase program, authorized amount | $		$ 150,000,000
Repurchase and retirement of shares		0	0	0
Stock repurchase program, remaining authorized repurchase amount | $		$ 124,400,000
Stock issued during period, shares, acquisitions	7,700,000
Stock issued during period, value, acquisitions | $	$ 121,200,000			$ 121,200,000
Preferred Stock, Shares Authorized		2,357,299	2,357,299
Preferred stock, shares issued		155,250	155,250
Preferred Stock, Dividend Rate, Percentage		6.75%	6.75%
Preferred Stock, Depositary Shares		3,105,000	3,105,000
Preferred stock conversion rate		5.7676
Preferred stock, dividends, per share, cash paid | $ / shares		$ 67.50
Preferred stock dividends per depositary share | $ / shares		3.3752
Preferred stock, liquidation preference per share | $ / shares		1,000	$ 1,000
Preferred Stock Liquidation Depositary Per Share | $ / shares		$ 50	$ 50
Preferred stock dividends | $		$ 10,400,000	$ 10,400,000	$ 10,400,000
Preferred Voting Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized		1,357,299
Nonvoting Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized		1,000,000

Shareowners' Deficit - Schedule

Shareowners' Deficit - Schedule of Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Beginning balance		$ (170.1)	$ (175.5)
Remeasurement of benefit obligations		(2.7)	2.5	$ (5.5)
Reclassifications, net		22.3	11.7
Unrealized loss on cash flow hedges arising during the period, net		(11.4)	(12.5)	(4.8)
Foreign currency gain (loss)		2.2	3.7	(6.5)
Ending balance		(159.7)	(170.1)	(175.5)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Beginning balance		(152)	(164.5)
Remeasurement of benefit obligations		(2.7)	2.5
Reclassifications, net	[1]	15.9	10
Unrealized loss on cash flow hedges arising during the period, net		0	0
Foreign currency gain (loss)		0	0
Ending balance		(138.8)	(152)	(164.5)
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member]
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Beginning balance		(14.7)	(3.9)
Remeasurement of benefit obligations		0	0
Reclassifications, net	[2]	6.4	1.7
Unrealized loss on cash flow hedges arising during the period, net	[3]	(11.4)	(12.5)
Foreign currency gain (loss)		0	0
Ending balance		(19.7)	(14.7)	(3.9)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Beginning balance		(3.4)	(7.1)
Remeasurement of benefit obligations		0	0
Reclassifications, net		0	0
Unrealized loss on cash flow hedges arising during the period, net		0	0
Foreign currency gain (loss)		2.2	3.7
Ending balance		$ (1.2)	$ (3.4)	$ (7.1)
[1]	These reclassifications are included in the other components of net periodic pension and postretirement benefit plans expense and represent amortization of prior service benefit and actuarial loss, net of tax and pension settlement charges, net of tax. The other components of net periodic pension and postretirement benefit plans expense are recorded in "Other components of pension and postretirement benefit plans expense" on the Consolidated Statements of Operations.  See Note 12 for further disclosures.
[2]	These reclassifications are reported within "Interest expense" on the Consolidated Statements of Operations when the hedged transactions impact earnings.
[3]	The unrealized loss on cash flow hedges represents the change in the fair value of the derivative instruments that occurred during the period, net of tax.  The unrealized loss on cash flow hedges is recorded in "Other current liabilities" and "Other noncurrent liabilities" on the Consolidated Balance Sheets.  See Note 11 for further disclosures.

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax Expense for Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ (1.4)	$ (1.4)	$ (0.6)
State and local	0.6	0	0.9
Foreign	3.5	0.5	1.6
Total current	2.7	(0.9)	1.9
Deferred:
Federal	(13.8)	(9.1)	(10.3)
State and local	7.7	(1.5)	5.7
Foreign	(1.3)	0.4	(1)
Total deferred	(7.4)	(10.2)	(5.6)
Valuation allowance	(20.8)	0.5	13.1
Total	$ (25.5)	$ (10.6)	$ 9.4

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. federal statutory rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal income tax	1.40%	2.10%	1.40%
Transaction costs	(8.60%)	(3.00%)	(3.10%)
Non-Deductible meals and entertainment	(0.40%)	(1.50%)	(1.80%)
Equity compensation	0.00%	(1.70%)	0.30%
Merger adjustments	0.00%	(1.70%)	0.00%
State net operating loss adjustments	(9.50%)	(1.00%)	(10.10%)
Change in valuation allowance, net of federal income tax	25.70%	(0.50%)	(21.80%)
Change in uncertain tax positions	2.50%	0.00%	0.00%
Other differences, net	(0.60%)	0.00%	(1.40%)
Effective tax rate	31.50%	13.70%	(15.50%)

Income Taxes - Schedule of In_2

Income Taxes - Schedule of Income Tax (Benefit) Provision Charged to Continuing Operations or Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income tax (benefit) provision related to:
Continuing operations	$ (25.5)	$ (10.6)	$ 9.4
Accumulated other comprehensive income	$ 2.4	$ 0.2	$ 1.3

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$ 239.9	$ 210.2
Finance and operating lease obligations	19.7	29.1
Pension and postretirement benefits	50.4	54.3
Employee benefits	9.1	6.1
Interest limitation	0	16.6
State tax credit	9	9.2
Other	31.4	29
Total deferred tax assets	359.5	354.5
Valuation allowance	(28.4)	(49.3)
Total deferred tax assets, net of valuation allowance	331.1	305.2
Deferred tax liabilities:
Property, plant and equipment and intangibles	(250.9)	(239.2)
Other	(8.6)	(18.4)
Total deferred tax liabilities	(259.5)	(257.6)
Net deferred tax assets	$ 71.6	$ 47.6

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Federal net operating loss carryforwards	$ 940.4
Federal net operating loss carryforwards, deferred tax asset value	197.5
Deferred Tax Assets, Operating Loss Carryforwards, State and Local Tax	42.4
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 19	$ 21.7
Operating loss carryforwards, expiration period	2023
Deferred Tax Assets, Valuation Allowance	$ 28.4	49.3
Interest Limitation [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Deferred Tax Assets, Valuation Allowance		16.6
Other Deferred Tax Assets [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Deferred Tax Assets, Valuation Allowance	28.4	$ 32.7
Domestic Country | Expire in 2023
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Federal net operating loss carryforwards	$ 125.6

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Uncertainties [Abstract]
Balance, beginning of year	$ 21.9	$ 22	$ 22.2
Change in tax positions for the current year	(2.2)
Change in tax positions for the current year		0.2	0
Decrease in tax positions for prior years	(0.5)	(0.3)	(0.2)
Balance, end of year	$ 19.2	$ 21.9	$ 22

Stock-Based and Deferred Comp_3

Stock-Based and Deferred Compensation Plans - Narrative (Details) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Available for Grant | shares	1.1
Intrinsic Value of awards outstanding	$ 0
Intrinsic Value of awards exercisable	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	3 years
Cash-Settled Awards Arrangement
Cash-settled awards, vesting period	3 years
Cash-settled awards, granted value	$ 10.5
Cash-settled awards, remaining unrecognized compensation expense	$ 7.3
Cash-settled awards, remaining unrecognized compensation expense, period for recognition	2 years
Other Noncurrent Liabilities [Member]
Cash-Settled Awards Arrangement
Expense incurred for cash-payment awards	$ 3.2
Stock Options and Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Unrecognized Compensation	$ 0
Performance Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Performance-Based Restricted Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation	$ 2.2
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Unrecognized Compensation	$ 2.2
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year
Restricted Stock [Member] | Hawaiian Telcom Holdco, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years

Stock-Based and Deferred Comp_4

Stock-Based and Deferred Compensation Plans - Summary of Stock Options and Stock Appreciation Rights Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Compensation expense for the year	$ 5.6	$ 7.4	$ 5.6
Stock Options and Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares, Outstanding and Exercisable, Beginning balance	144	151	181
Shares, Exercised	0	0	(19)
Shares, Forfeited	(1)	(7)	(9)
Shares, Expired	0	0	(2)
Shares, Outstanding and Exercisable, Ending balance	143	144	151
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted-Average Exercise Price Per Share, Outstanding and Exercisable, Beginning balance	$ 18.35	$ 18.29	$ 17.10
Weighted-Average Exercise Price Per Share, Exercised	0	0	8.68
Weighted-Average Exercise Price Per Share, Forfeited	17.05	17.05	17.05
Weighted-Average Exercise Price Per Share, Expired	0	0	8.35
Weighted-Average Exercise Price Per Share, Outstanding and Exercisable, Ending balance	$ 18.37	$ 18.35	$ 18.29
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Compensation expense for the year	$ 0	$ 0	$ 0
Tax benefit related to compensation expense	0	0	0
Intrinsic value of awards exercised	0	0	0.1
Cash received from awards exercised	0	0	0.2
Grant date fair value of awards vested	$ 0	$ 0	$ 0

Stock-Based and Deferred Comp_5

Stock-Based and Deferred Compensation Plans - Summary of Outstanding and Exercisable Awards (Details) shares in Thousands	Dec. 31, 2020$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Shares | shares	143
Exercisable Shares | shares	143
Stock Options and Stock Appreciation Rights [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ / shares	$ 18.37
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ / shares	$ 18.37
$17.05 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Shares | shares	115
Outstanding Weighted Average Exercise Price Per Share | $ / shares	$ 17.05
Exercisable Shares | shares	115
Exercisable Weighted Average Exercise Price Per Share | $ / shares	$ 17.05
$23.75 to $26.05 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Shares | shares	28
Outstanding Weighted Average Exercise Price Per Share | $ / shares	$ 23.83
Exercisable Shares | shares	28
Exercisable Weighted Average Exercise Price Per Share | $ / shares	$ 23.83

Stock-Based and Deferred Comp_6

Stock-Based and Deferred Compensation Plans - Summary of Performance Based Restricted Award Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Compensation expense for the year		$ 5.6	$ 7.4	$ 5.6
Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Shares, Non-vested, Beginning balance		1,282	692	871
Shares, Granted	[1]	0	763	288
Shares, Vested		(245)	(160)	(308)
Shares, Forfeited		0	(13)	(159)
Shares, Non-vested, Ending balance		1,037	1,282	692
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Exercise Price Per Share, Non-vested, Beginning balance		$ 13	$ 18.67	$ 17.30
Weighted-Average Exercise Price Per Share, Granted	[1]	0	8.34	17.60
Weighted-Average Exercise Price Per Share, Vested		22.03	15.45	15.45
Weighted-Average Exercise Price Per Share, Forfeited		0	11.32	15.45
Weighted-Average Exercise Price Per Share, Non-vested, Ending balance		$ 10.87	$ 13	$ 18.67
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Compensation expense for the year		$ 2.4	$ 2.7	$ 2.1
Tax benefit related to compensation expense		(0.5)	(0.6)	(0.5)
Grant date fair value of awards vested		$ 5.4	$ 2.5	$ 4.7
[1]	Assumes the maximum number of awards that can be earned if the performance conditions are achieved.

Stock-Based and Deferred Comp_7

Stock-Based and Deferred Compensation Plans - Summary of Time Based Restricted Award Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Compensation expense for the year	$ 5.6	$ 7.4	$ 5.6
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Shares, Non-vested, Beginning balance	942	497	164
Shares, Granted	68	625	245
Shares, Awards converted pursuant to Hawaiian Telcom acquisition	0	0	149
Shares, Vested	(216)	(167)	(61)
Shares, Forfeited	(2)	(13)	0
Shares, Non-vested, Ending balance	792	942	497
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Exercise Price Per Share, Non-vested, Beginning balance	$ 11.67	$ 17.02	$ 18.57
Weighted-Average Exercise Price Per Share, Granted	14.99	8.43	17.05
Weighted-Average Exercise Price Per Share, Awards converted pursuant to Hawaiian Telcom acquisition	0	0	15.70
Weighted-Average Exercise Price Per Share, Vested	13.58	15.39	18.08
Weighted-Average Exercise Price Per Share, Forfeited	15.70	12.76	0
Weighted-Average Exercise Price Per Share, Non-vested, Ending balance	$ 11.42	$ 11.67	$ 17.02
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Compensation expense for the year	$ 3.2	$ 4.7	$ 3.5
Tax benefit related to compensation expense	(0.7)	(1.1)	(0.8)
Grant date fair value of awards vested	$ 2.9	$ 2.6	$ 1.1

Restructuring and Severance - S

Restructuring and Severance - Summary of Activity in Restructuring and Severance Liability (Details) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Beginning balance				$ 2.9				$ 10.2		$ 2.9	$ 10.2	$ 14.5
Restructuring Charges	$ 0.5	$ 0.8	$ 0.4	15.2	$ 0.5	$ 1.3	$ 1.8	3.3		16.9	6.9	8.3
Hawaiian Telcom opening balance sheet adjustment											0.1	3.8
Utilizations										(15.3)	(14.3)	(16.4)
Ending balance	4.5				2.9					4.5	2.9	10.2
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance				2.6				9.5		2.6	9.5	14.4
Restructuring Charges										16.9	6.9	7.5
Hawaiian Telcom opening balance sheet adjustment											0.1	3.8
Utilizations										(15)	(13.9)	(16.2)
Ending balance	4.5				2.6					4.5	2.6	9.5
Lease Abandonment [Member]
Restructuring Reserve [Roll Forward]
Beginning balance				$ 0.3				$ 0.7		0.3	0.7	0.1
Restructuring Charges									$ 0.8	0	0	0.8
Hawaiian Telcom opening balance sheet adjustment											0	0
Utilizations										(0.3)	(0.4)	(0.2)
Ending balance	$ 0				$ 0.3					$ 0	$ 0.3	$ 0.7

Restructuring and Severance - N

Restructuring and Severance - Narratives (Details) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost And Reserve [Line Items]
Restructuring liabilities related to business acquisitions												$ 3.8
Restructuring Charges	$ 0.5	$ 0.8	$ 0.4	$ 15.2	$ 0.5	$ 1.3	$ 1.8	$ 3.3		$ 16.9	$ 6.9	8.3
Restructuring liabilities included in other current liabilities	$ 4.5				$ 2.9					4.5	2.9
Lease Abandonment [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Charges									$ 0.8	$ 0	$ 0	$ 0.8
Entertainment and Communications [Member]
Restructuring Cost And Reserve [Line Items]
Severance charge				$ 14.5

Restructuring and Severance -_2

Restructuring and Severance - Summary of Restructuring Activity by Business Segment (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Beginning balance				$ 2.9				$ 10.2	$ 2.9	$ 10.2	$ 14.5
Restructuring Charges	$ 0.5	$ 0.8	$ 0.4	15.2	$ 0.5	$ 1.3	$ 1.8	3.3	16.9	6.9	8.3
Hawaiian Telcom opening balance sheet adjustment										0.1	3.8
Utilizations									(15.3)	(14.3)	(16.4)
Ending balance	4.5				2.9				4.5	2.9	10.2
Corporate, Non-Segment [Member]
Restructuring Reserve [Roll Forward]
Beginning balance				0				0.3	0	0.3	0
Restructuring Charges									0.1	0	0.3
Hawaiian Telcom opening balance sheet adjustment										0	0
Utilizations									0	(0.3)	0
Ending balance	0.1				0				0.1	0	0.3
Entertainment and Communications [Member] | Operating Segments [Member]
Restructuring Reserve [Roll Forward]
Beginning balance				2.4				8.6	2.4	8.6	12.3
Restructuring Charges									14.8	4.9	3.1
Hawaiian Telcom opening balance sheet adjustment										0.1	3.8
Utilizations									(12.8)	(11.2)	(10.6)
Ending balance	4.4				2.4				4.4	2.4	8.6
IT Services and Hardware [Member] | Operating Segments [Member]
Restructuring Reserve [Roll Forward]
Beginning balance				$ 0.5				$ 1.3	0.5	1.3	2.2
Restructuring Charges									2	2	4.9
Hawaiian Telcom opening balance sheet adjustment										0	0
Utilizations									(2.5)	(2.8)	(5.8)
Ending balance	$ 0				$ 0.5				$ 0	$ 0.5	$ 1.3

Business Segment Information -

Business Segment Information - Narrative (Details)	12 Months Ended
	Dec. 31, 2020USD ($)Segment	Dec. 31, 2019USD ($)Segment	Dec. 31, 2018Segment
Segment Reporting Information [Line Items]
Number of operating segments | Segment	2	2	2
Increases (decreases) in total assets	$ 14,800,000
Deferred tax assets, net of valuation allowance, noncurrent	82,500,000	$ 59,300,000
Deferred tax liabilities, net, noncurrent	10,900,000	11,700,000
Outstanding balance of accounts receivables sold	0	44,700,000
Operating Segments [Member] | Entertainment and Communications [Member]
Segment Reporting Information [Line Items]
Increases (decreases) in total assets	(36,700,000)
Operating Segments [Member] | IT Services and Hardware [Member]
Segment Reporting Information [Line Items]
Increases (decreases) in total assets	(23,500,000)
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Increases (decreases) in total assets	75,000,000
Deferred tax assets, net of valuation allowance, noncurrent	82,500,000	59,300,000
Deferred tax liabilities, net, noncurrent	10,900,000	11,700,000
Disallowed interest expense		16,600,000
Outstanding balance of accounts receivables sold	$ 0	$ 44,700,000

Business Segment Information _2

Business Segment Information - Schedule of Business Segment Information (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenue		$ 410.3	$ 389.5	$ 380	$ 380	$ 390.4	$ 382.5	$ 384.2	$ 379.6	$ 1,559.8	$ 1,536.7	$ 1,378.2
Operating income		33.8	$ 24.7	$ 27.7	$ (20.2)	15.3	$ 22.8	$ 24.9	$ 10.1	66	73.1	83.3
Expenditures for long-lived assets	[1]									230	223.8	437.4
Depreciation and amortization										293.4	304.9	252
Assets		2,668.6				2,653.8				2,668.6	2,653.8
Operating Segments [Member] | Entertainment and Communications [Member]
Segment Reporting Information [Line Items]
Revenue										969.6	995.7	853.4
Operating income										99.7	105.5	103.3
Expenditures for long-lived assets	[1]									206.4	201.3	408
Depreciation and amortization										252.7	255.8	210.8
Assets		1,803.3				1,840				1,803.3	1,840
Operating Segments [Member] | IT Services and Hardware [Member]
Segment Reporting Information [Line Items]
Revenue										616.6	567.4	550.9
Operating income										24.6	2.6	17.2
Expenditures for long-lived assets	[1]									23.5	22.4	29.2
Depreciation and amortization										40.6	48.9	41
Assets		477.2				500.7				477.2	500.7
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Revenue										(26.4)	(26.4)	(26.1)
Intersegment Elimination [Member] | Entertainment and Communications [Member]
Segment Reporting Information [Line Items]
Revenue										19.7	21.6	22.3
Intersegment Elimination [Member] | IT Services and Hardware [Member]
Segment Reporting Information [Line Items]
Revenue										6.7	4.8	3.8
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating income										(58.3)	(35)	(37.2)
Expenditures for long-lived assets	[1]									0.1	0.1	0.2
Depreciation and amortization										0.1	0.2	0.2
Corporate and Elimination [Member]
Segment Reporting Information [Line Items]
Assets		$ 388.1				$ 313.1				388.1	313.1
Sales [Member] | Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Revenue										$ 26.4	$ 26.4	$ 26.1
[1]	Includes cost of acquisitions and purchase of wireless spectrum assets

Quarterly Financial Informati_3

Quarterly Financial Information (Unaudited) - Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Selected Quarterly Financial Information [Abstract]
Revenue	$ 410.3	$ 389.5	$ 380	$ 380	$ 390.4	$ 382.5	$ 384.2	$ 379.6	$ 1,559.8	$ 1,536.7	$ 1,378.2
Operating (loss) income	33.8	24.7	27.7	(20.2)	15.3	22.8	24.9	10.1	66	73.1	83.3
Net loss	$ (5.6)	$ (8.2)	$ (7.8)	$ (34)	$ (20.6)	$ (13.6)	$ (5.5)	$ (26.9)	$ (55.6)	$ (66.6)	$ (69.8)
Basic and diluted net loss per common share	$ (0.16)	$ (0.21)	$ (0.21)	$ (0.72)	$ (0.46)	$ (0.32)	$ (0.16)	$ (0.59)	$ (1.30)	$ (1.53)	$ (1.73)

Quarterly Financial Informati_4

Quarterly Financial Information (Unaudited) - Narrative (Details) - USD ($) $ in Millions	Mar. 13, 2020	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Income Statements, Captions [Line Items]
Restructuring and severance related charges		$ 0.5	$ 0.8	$ 0.4	$ 15.2	$ 0.5	$ 1.3	$ 1.8	$ 3.3	$ 16.9	$ 6.9	$ 8.3
Transaction and integration costs		$ 1.2	$ 2.2	$ 2.5	29.1	$ 9	$ 0.2	$ 0.6	$ 3	35	12.8	22.5
Interest expense										$ 134.2	$ 139.6	$ 131.5
Brookfield Infrastructure Group [Member]
Condensed Income Statements, Captions [Line Items]
Termination fee	$ 24.8				$ 24.8

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]
Capitalized interest expense	$ 1.3	$ 1.7	$ 1
Cash paid/(received) for:
Interest	125.5	129.3	131.7
Income taxes, net of refunds	0.5	0.5	(13.8)
Noncash investing and financing activities:
Stock consideration for acquisition of Hawaiian Telcom		0	121.2
Acquisition of property by assuming debt and other financing arrangements	7.7	14.5	51.5
Acquisition of property on account	$ 24.3	$ 26	$ 35.8

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning of Period	$ 14.3	$ 13	$ 10.4
Charge (Benefit) to Expenses	14.7	12.5	8.4
(To) From Other Accounts	0	0	0
Deductions	6	11.2	5.8
End of Period	23	14.3	13
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning of Period	49.3	48.7	36.1
Charge (Benefit) to Expenses	(20.8)	0.5	13.1
(To) From Other Accounts	(0.1)	0.1	(0.5)
Deductions	0	0	0
End of Period	$ 28.4	$ 49.3	$ 48.7