Recent Accounting Literature	3 Months Ended
Mar. 31, 2017
Recent Accounting Literature [Abstract]
Recent Accounting Literature	(2) Recent Accounting Literature: Recent Accounting Pronouncements Not Yet Adopted Revenue Recognition In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, “Revenue from Contracts with Customers.” This standard, along with its related amendments, requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which Frontier expects to be entitled in exchange for those goods or services. This new standard will be adopted by Frontier for annual and interim reporting periods beginning with the first quarter of 2018. The FASB allows two adoption methods under ASC 606. Companies are permitted to either apply the requirements retrospectively to all prior periods presented, or apply the requirements in the year of adoption, through a cumulative adjustment. We currently plan to adopt the standard in the first quarter of 2018, using the “modified retrospective method.” Under that method, we will apply the rules to all contracts existing as of January 1, 2018, recognizing in beginning retained earnings, a cumulative-effect adjustment to include the establishment of contract asset and contract liability accounts with a corresponding adjustment to retained earnings and providing additional disclosures comparing revenue recognized under ASC 606 to revenue reported under the previous accounting standards. Upon initial evaluation, we believe the key changes in the standard that impact our revenue recognition relate to the allocation of contract revenues among various services and equipment, and the timing of when those revenues are recognized. Additionally, the new standard will impact the timing of recognizing costs to obtain contracts. This includes a change in our existing policy related to the way we account for customer incentives, upfront non-recurring charges, commission payments, customer disputes and the allocation of discounts. We have established a cross-functional team to implement the standard and are in the process of identifying and implementing changes to our systems, processes, policies and internal controls to meet the standard’s reporting and disclosure requirements. Leases In February 2016, the FASB issued ASU No. 2016 – 02, “Leases (Topic 842).” This standard establishes the principles to report transparent and economically neutral information about the assets and liabilities that arise from leases. Upon implementation, lessees will need to recognize almost all leases on their balance sheet as a right-of-use asset and a lease liability. It will be critical to identify leases embedded in a contract to avoid misstating the lessee’s balance sheet. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Classification will be based on criteria that are largely similar to those applied in current lease accounting, but without explicit bright lines. Lessor accounting is similar to the current model, but updated to align with certain changes to the lessee model and the new revenue recognition standard. Existing sale-leaseback guidance, including guidance for real estate, is replaced with a new model applicable to both lessees and lessors. The new guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted. Frontier is currently evaluating the impact of adopting the new standard, but has not yet determined the impact of adoption on its consolidated financial statements. Compensation – Retirement Benefits In March 2017, the FASB issued ASU No. 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost”. This standard was established to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost by requiring that an employer disaggregate the service cost component of periodic benefit cost from the other components of net benefit cost. The amendments in the update also provide explicit guidance on how to present the service cost component and other components of net benefit cost in the income statement and allow only the service cost components of net benefit cost to be eligible for capitalization. The new guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those annual periods. Frontier is currently evaluating the impact of adopting the new standard and has not yet determined the impact of adoption on its consolidated financial statements. Intangibles – Goodwill In January 2017, the FASB issued ASU No. 2017-04, “Simplifying the Test for Goodwill Impairment.” This standard was established to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. Under the amendments in this Update, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The FASB also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. Therefore, the same impairment assessment applies to all reporting units. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The new guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Frontier is currently evaluating the impact of adopting the new standard and has not yet determined the impact of adoption on its consolidated financial statements. Recently Adopted Accounting Pronouncements Compensation – Stock Compensation In March 2016, the FASB issued ASU No. 2016-09, “Improvements to Employee Share-Based Payment Accounting,” to amend ASC Topic 718, “Compensation – Stock Compensation.” The ASU is part of the FASB’s ongoing simplification initiative, which is designed to reduce cost and complexity while maintaining or improving the usefulness of the information provided to the users of financial statements. The simplifications address a variety of areas for public entities, including the following: 1) accounting for income taxes, 2) classification of excess tax benefits on the statement of cash flows, 3) forfeitures, 4) minimum statutory tax withholding requirements, 5) classifications of employee taxes paid on the statement of cash flows when an employer withholds shares for tax withholding purposes, and 6) classification of awards with repurchase features. This guidance was effective for Frontier as of the first quarter of 2017. During the three months ended March 31, 2017 Frontier recognized $2 million of income tax expense and recorded a cumulative effect adjustment to beginning accumulated deficit of $1 million to recognize all unrecognized deferred tax benefits recorded as of January 1, 2017. For the three months ended March 31, 2016, Frontier reclassified $10 million of taxes paid on behalf of employees related to shares withheld from “Cash flows provided from (used by) operations” to “Cash flows used by financing activities” in accordance with the new standard.

(2) Recent Accounting Literature:

Recent Accounting Pronouncements Not Yet Adopted

Revenue Recognition

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, “Revenue from Contracts with Customers.” This standard, along with its related amendments, requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which Frontier expects to be entitled in exchange for those goods or services. This new standard will be adopted by Frontier for annual and interim reporting periods beginning with the first quarter of 2018.

The FASB allows two adoption methods under ASC 606. Companies are permitted to either apply the requirements retrospectively to all prior periods presented, or apply the requirements in the year of adoption, through a cumulative adjustment. We currently plan to adopt the standard in the first quarter of 2018, using the “modified retrospective method.” Under that method, we will apply the rules to all contracts existing as of January 1, 2018, recognizing in beginning retained earnings, a cumulative-effect adjustment to include the establishment of contract asset and contract liability accounts with a corresponding adjustment to retained earnings and providing additional disclosures comparing revenue recognized under ASC 606 to revenue reported under the previous accounting standards.

Upon initial evaluation, we believe the key changes in the standard that impact our revenue recognition relate to the allocation of contract revenues among various services and equipment, and the timing of when those revenues are recognized. Additionally, the new standard will impact the timing of recognizing costs to obtain contracts. This includes a change in our existing policy related to the way we account for customer incentives, upfront non-recurring charges, commission payments, customer disputes and the allocation of discounts.

We have established a cross-functional team to implement the standard and are in the process of identifying and implementing changes to our systems, processes, policies and internal controls to meet the standard’s reporting and disclosure requirements.

Leases

In February 2016, the FASB issued ASU No. 2016 – 02, “Leases (Topic 842).” This standard establishes the principles to report transparent and economically neutral information about the assets and liabilities that arise from leases. Upon implementation, lessees will need to recognize almost all leases on their balance sheet as a right-of-use asset and a lease liability. It will be critical to identify leases embedded in a contract to avoid misstating the lessee’s balance sheet. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Classification will be based on criteria that are largely similar to those applied in current lease accounting, but without explicit bright lines. Lessor accounting is similar to the current model, but updated to align with certain changes to the lessee model and the new revenue recognition standard. Existing sale-leaseback guidance, including guidance for real estate, is replaced with a new model applicable to both lessees and lessors. The new guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted. Frontier is currently evaluating the impact of adopting the new standard, but has not yet determined the impact of adoption on its consolidated financial statements.

Compensation – Retirement Benefits

In March 2017, the FASB issued ASU No. 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost”. This standard was established to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost by requiring that an employer disaggregate the service cost component of periodic benefit cost from the other components of net benefit cost. The amendments in the update also provide explicit guidance on how to present the service cost component and other components of net benefit cost in the income statement and allow only the service cost components of net benefit cost to be eligible for capitalization. The new guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those annual periods. Frontier is currently evaluating the impact of adopting the new standard and has not yet determined the impact of adoption on its consolidated financial statements.

Intangibles – Goodwill

In January 2017, the FASB issued ASU No. 2017-04, “Simplifying the Test for Goodwill Impairment.” This standard was established to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. Under the amendments in this Update, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The FASB also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. Therefore, the same impairment assessment applies to all reporting units. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The new guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Frontier is currently evaluating the impact of adopting the new standard and has not yet determined the impact of adoption on its consolidated financial statements.

Recently Adopted Accounting Pronouncements

Compensation – Stock Compensation

In March 2016, the FASB issued ASU No. 2016-09, “Improvements to Employee Share-Based Payment Accounting,” to amend ASC Topic 718, “Compensation – Stock Compensation.” The ASU is part of the FASB’s ongoing simplification initiative, which is designed to reduce cost and complexity while maintaining or improving the usefulness of the information provided to the users of financial statements. The simplifications address a variety of areas for public entities, including the following: 1) accounting for income taxes, 2) classification of excess tax benefits on the statement of cash flows, 3) forfeitures, 4) minimum statutory tax withholding requirements, 5) classifications of employee taxes paid on the statement of cash flows when an employer withholds shares for tax withholding purposes, and 6) classification of awards with repurchase features. This guidance was effective for Frontier as of the first quarter of 2017. During the three months ended March 31, 2017 Frontier recognized $2 million of income tax expense and recorded a cumulative effect adjustment to beginning accumulated deficit of $1 million to recognize all unrecognized deferred tax benefits recorded as of January 1, 2017. For the three months ended March 31, 2016, Frontier reclassified $10 million of taxes paid on behalf of employees related to shares withheld from “Cash flows provided from (used by) operations” to “Cash flows used by financing activities” in accordance with the new standard.