Description of Business and Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2018
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.
Discontinued Operations	Discontinued Operations — In the second quarter of 2014, we entered into agreements to sell our wireless spectrum licenses and certain other assets related to our wireless business. The agreement to sell our wireless spectrum licenses closed on September 30, 2014. Effective March 31, 2015, all wireless subscribers were migrated off our network and we ceased providing wireless services and operations. The results of operations attributable to our wireless operations are reported in discontinued operations in the Consolidated Statements of Income. Other income of $0.3 million was recorded in 2016 related to an individual tower sale. Restructuring payments associated with our discontinued operations of $4.4 million were included in operating cash flow in the Consolidated Statements of Cash Flows for 2016.
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 insurance and claims liabilities; the valuation of allowances for receivables and deferred income taxes; reserves recorded for income tax exposures; the valuation of asset retirement obligations; assets and liabilities related to employee benefits; the valuation of deferred costs under Accounting Standards Codification ("ASC") 606; 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.
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents	Restricted cash at December 31, 2017, represents the proceeds from the issuance of the 8% Senior Notes due 2025 (the “8% Senior Notes”). Proceeds were placed into an escrow account along with Company cash that was sufficient to pay all interest that accrued on the 8% Senior Notes up to, but not including, October 9, 2018. The amounts held in escrow were contractually restricted as to their withdrawal or use and were used to fund the cash portion of the acquisition of Hawaiian Telcom Holdco, Inc. ("Hawaiian Telcom") in July 2018, and to fund semi-annual interest payments associated with this debt. As of December 31, 2017, $378.7 million is classified as "Restricted Cash." As of December 31, 2018, no cash is classified as "Restricted Cash."
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 18% of the outstanding accounts receivable balance at December 31, 2018. The Company had receivables with one customer, General Electric Company ("GE"), which made up 10% of the outstanding accounts receivable balance at December 31, 2017. Unbilled receivables arise from services rendered but not yet billed. As of December 31, 2018 and 2017, unbilled receivables totaled $19.0 million and $14.2 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 uncollectible accounts is reduced.
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 Financial Accounting Standards Board (“FASB”) ASC 860, "Transfers and Servicing." The fees paid in relation to such sales of accounts receivable were $0.1 million in 2018 and are included in "Selling, general, and administrative" in the Consolidated Statements of Operations. Approximately $20 million of receivables were sold under the terms of the factoring agreement in 2018. 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. 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 generally allocated to reporting units one level below business segments. 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.
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.
Investment in CyrusOne	Investment in CyrusOne — On January 24, 2013, we completed the initial public offering ("IPO") of CyrusOne Inc. ("CyrusOne"), which owns and operates our former Data Center Colocation business. In 2016, we sold 4.1 million shares of CyrusOne's common stock for net proceeds totaling $189.7 million that resulted in a gain of $157.0 million. In the first quarter of 2017, we sold our remaining 2.8 million shares of CyrusOne Inc. common stock for net proceeds totaling $140.7 million that resulted in a realized gain of $117.7 million. As of December 31, 2017, we no longer have an investment in CyrusOne Inc. Dividends declared by CyrusOne in 2016 totaled $6.4 million and were included in "Other (income) expense, net" in the Consolidated Statement of Operations
Equity Method Investments	Equity Method Investments — The Company records equity method investments at carrying value within “Other noncurrent assets” in the Consolidated Balance Sheets. The Company's proportionate share of the investments’ net loss had a minimal impact on our Consolidated Statements of Operations in 2018, 2017 and 2016. Equity method investments are tested for impairment on an annual basis or when events or changes in circumstances indicate that such assets may be impaired. In the third quarter of 2017, the entire carrying value of $4.7 million of an equity method investment was impaired and recorded to "Other (income) expense, net" in the Consolidated Statements of Operations.
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 $5.8 million and $3.8 million as of December 31, 2018 and 2017, respectively, and was included in "Other noncurrent assets" in the Consolidated Balance Sheets. Investments are reviewed annually for impairment, or sooner if changes in circumstances indicate the carrying value may not be recoverable. If the carrying value of the investment exceeds its estimated fair value and the decline in value is determined to be other-than-temporary, an impairment loss is recognized for the difference. The Company estimates fair value using external information and discounted cash flow analysis.
Leases	Leases — Certain property and equipment are leased. At lease inception, the lease terms are assessed to determine if the transaction should be classified as a capital or operating lease.
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 — Effective January 1, 2018, the Company adheres to revenue recognition principles described in FASB ASC 606, “Revenue Recognition.” 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. The Company had no customers whose revenue comprised greater than 10% of total revenue in 2018 and 2017. The Company had sales with one customer, GE, which contributed 11% to total revenue in 2016. Revenue derived from foreign operations is approximately 6% and 3% of consolidated revenue in 2018 and 2017, respectively. Revenue derived from foreign operations was immaterial in 2016. 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. The Company began recognizing a financing component, in accordance with ASC 606, associated with the up-front payments for services to be delivered under IRU contracts for fiber circuit capacity. 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 shipped. 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, we evaluate whether we are the principal (in which case we report revenues on a gross basis) or an agent (in which case we report revenues on a net basis). In this assessment, we consider if we obtain control of the specified goods or services before they are transferred to the customer as well as other indicators such as the party primarily responsible for fulfillment, inventory risk and discretion in establishing price. Based on these criteria, the Company typically acts as an agent and, as such, will record revenue associated with the sale of hardware net of the related cost of products. 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 enterprise 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. Consumer customers have implied month-to-month contracts, while enterprise customers, with the exception of contracts associated with the SEA-US, 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 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 accounts for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers, which was adopted on January 1, 2018, using the full retrospective method. See below for further discussion of the adoption, including the impact on our 2017 and 2016 financial statements. 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 180 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. The IRU contracts typically have a duration ranging from 15 to 25 years.
Advertising Expenses	Advertising Expenses — Costs related to advertising are expensed as incurred. Advertising costs were $14.2 million, $13.5 million, and $9.5 million in 2018, 2017, and 2016, 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 investment tax credits are amortized as a reduction of the provision for income taxes over the estimated useful lives of the related property, plant and equipment. 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 2018, 2017, and 2016 were $22.2 million, $16.8 million and $16.3 million, respectively. The amounts reported as expense for 2018, 2017 and 2016 were $23.4 million, $17.7 million, and $17.5 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 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 and bargained postretirement plans (approximately 8-12) and average life expectancy of retirees for the Cincinnati management postretirement plan (approximately 15 years). The accumulated gains or losses associated with the Hawaii plans do not exceed the corridor requiring amortization.
Business Combinations	Business Combinations — In accounting for business combinations, we apply the accounting requirements of FASB ASC 805, “Business Combinations,” 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. The Company reports in its consolidated financial statements provisional amounts for the items for which accounting is incomplete. Goodwill is adjusted for any changes to provisional amounts made within the measurement period.
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.
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 of Financial Instruments	The fair value of our long-term debt was based on closing or estimated market prices of the Company’s debt at December 31, 2018 and December 31, 2017, 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 Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

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.

Discontinued Operations

Discontinued Operations — In the second quarter of 2014, we entered into agreements to sell our wireless spectrum licenses and certain other assets related to our wireless business. The agreement to sell our wireless spectrum licenses closed on September 30, 2014. Effective March 31, 2015, all wireless subscribers were migrated off our network and we ceased providing wireless services and operations. The results of operations attributable to our wireless operations are reported in discontinued operations in the Consolidated Statements of Income. Other income of $0.3 million was recorded in 2016 related to an individual tower sale. Restructuring payments associated with our discontinued operations of $4.4 million were included in operating cash flow in the Consolidated Statements of Cash Flows for 2016.

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 insurance and claims liabilities; the valuation of allowances for receivables and deferred income taxes; reserves recorded for income tax exposures; the valuation of asset retirement obligations; assets and liabilities related to employee benefits; the valuation of deferred costs under Accounting Standards Codification ("ASC") 606; 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.

Cash and Cash Equivalents, Restricted Cash and Cash Equivalents

Restricted cash at December 31, 2017, represents the proceeds from the issuance of the 8% Senior Notes due 2025 (the “8% Senior Notes”). Proceeds were placed into an escrow account along with Company cash that was sufficient to pay all interest that accrued on the 8% Senior Notes up to, but not including, October 9, 2018. The amounts held in escrow were contractually restricted as to their withdrawal or use and were used to fund the cash portion of the acquisition of Hawaiian Telcom Holdco, Inc. ("Hawaiian Telcom") in July 2018, and to fund semi-annual interest payments associated with this debt. As of December 31, 2017, $378.7 million is classified as "Restricted Cash." As of December 31, 2018, no cash is classified as "Restricted Cash."

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 18% of the outstanding accounts receivable balance at December 31, 2018. The Company had receivables with one customer, General Electric Company ("GE"), which made up 10% of the outstanding accounts receivable balance at December 31, 2017. Unbilled receivables arise from services rendered but not yet billed. As of December 31, 2018 and 2017, unbilled receivables totaled $19.0 million and $14.2 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 uncollectible accounts is reduced.

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 Financial Accounting Standards Board (“FASB”) ASC 860, "Transfers and Servicing." The fees paid in relation to such sales of accounts receivable were $0.1 million in 2018 and are included in "Selling, general, and administrative" in the Consolidated Statements of Operations. Approximately $20 million of receivables were sold under the terms of the factoring agreement in 2018. 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. 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 generally allocated to reporting units one level below business segments. 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.

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.

Investment in CyrusOne

Investment in CyrusOne — On January 24, 2013, we completed the initial public offering ("IPO") of CyrusOne Inc. ("CyrusOne"), which owns and operates our former Data Center Colocation business.

In 2016, we sold 4.1 million shares of CyrusOne's common stock for net proceeds totaling $189.7 million that resulted in a gain of $157.0 million. In the first quarter of 2017, we sold our remaining 2.8 million shares of CyrusOne Inc. common stock for net proceeds totaling $140.7 million that resulted in a realized gain of $117.7 million. As of December 31, 2017, we no longer have an investment in CyrusOne Inc. Dividends declared by CyrusOne in 2016 totaled $6.4 million and were included in "Other (income) expense, net" in the Consolidated Statement of Operations

Equity Method Investments

Equity Method Investments — The Company records equity method investments at carrying value within “Other noncurrent assets” in the Consolidated Balance Sheets. The Company's proportionate share of the investments’ net loss had a minimal impact on our Consolidated Statements of Operations in 2018, 2017 and 2016. Equity method investments are tested for impairment on an annual basis or when events or changes in circumstances indicate that such assets may be impaired. In the third quarter of 2017, the entire carrying value of $4.7 million of an equity method investment was impaired and recorded to "Other (income) expense, net" in the Consolidated Statements of Operations.

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 $5.8 million and $3.8 million as of December 31, 2018 and 2017, respectively, and was included in "Other noncurrent assets" in the Consolidated Balance Sheets. Investments are reviewed annually for impairment, or sooner if changes in circumstances indicate the carrying value may not be recoverable. If the carrying value of the investment exceeds its estimated fair value and the decline in value is determined to be other-than-temporary, an impairment loss is recognized for the difference. The Company estimates fair value using external information and discounted cash flow analysis.

Leases

Leases — Certain property and equipment are leased. At lease inception, the lease terms are assessed to determine if the transaction should be classified as a capital or operating lease.

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 — Effective January 1, 2018, the Company adheres to revenue recognition principles described in FASB ASC 606, “Revenue Recognition.” 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.

The Company had no customers whose revenue comprised greater than 10% of total revenue in 2018 and 2017. The Company had sales with one customer, GE, which contributed 11% to total revenue in 2016. Revenue derived from foreign operations is approximately 6% and 3% of consolidated revenue in 2018 and 2017, respectively. Revenue derived from foreign operations was immaterial in 2016.

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. The Company began recognizing a financing component, in accordance with ASC 606, associated with the up-front payments for services to be delivered under IRU contracts for fiber circuit capacity. 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 shipped. 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, we evaluate whether we are the principal (in which case we report revenues on a gross basis) or an agent (in which case we report revenues on a net basis). In this assessment, we consider if we obtain control of the specified goods or services before they are transferred to the customer as well as other indicators such as the party primarily responsible for fulfillment, inventory risk and discretion in establishing price. Based on these criteria, the Company typically acts as an agent and, as such, will record revenue associated with the sale of hardware net of the related cost of products.

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 enterprise 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.

Consumer customers have implied month-to-month contracts, while enterprise customers, with the exception of contracts associated with the SEA-US, 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 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 accounts for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers, which was adopted on January 1, 2018, using the full retrospective method. See below for further discussion of the adoption, including the impact on our 2017 and 2016 financial statements.

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 180 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. The IRU contracts typically have a duration ranging from 15 to 25 years.

Advertising Expenses

Advertising Expenses — Costs related to advertising are expensed as incurred. Advertising costs were $14.2 million, $13.5 million, and $9.5 million in 2018, 2017, and 2016, 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 investment tax credits are amortized as a reduction of the provision for income taxes over the estimated useful lives of the related property, plant and equipment. 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 2018, 2017, and 2016 were $22.2 million, $16.8 million and $16.3 million, respectively. The amounts reported as expense for 2018, 2017 and 2016 were $23.4 million, $17.7 million, and $17.5 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 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 and bargained postretirement plans (approximately 8-12) and average life expectancy of retirees for the Cincinnati management postretirement plan (approximately 15 years). The accumulated gains or losses associated with the Hawaii plans do not exceed the corridor requiring amortization.

Business Combinations

Business Combinations — In accounting for business combinations, we apply the accounting requirements of FASB ASC 805, “Business Combinations,” 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. The Company reports in its consolidated financial statements provisional amounts for the items for which accounting is incomplete. Goodwill is adjusted for any changes to provisional amounts made within the measurement period.

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.

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 of Financial Instruments

The fair value of our long-term debt was based on closing or estimated market prices of the Company’s debt at December 31, 2018 and December 31, 2017, 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.