Recent Accounting Pronouncements	12 Months Ended
Dec. 31, 2015
Recent Accounting Pronouncements [Abstract]
Recent Accounting Pronouncements	(2) Recent Accounting Pronouncements: 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 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 is effective for annual and interim reporting periods beginning after December 15, 2017. Companies are also permitted to voluntarily adopt the new standard as of the original effective date that was for annual reporting periods beginning after December 15, 2016. 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. Frontier is currently evaluating the impact of adopting the new standard, but has not yet selected a transition method or determined the impact of adoption on its consolidated financial statements. Debt Issuance Costs In April 2015, the FASB issued ASU No. 2015-03, “Interest – Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs.” This standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. In August 2015, the FASB issued ASU No. 2015-15, “Interest – Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line of Credit Arrangements”. This standard permits an entity to defer and present debt issuance costs related to line of credit arrangements as an asset and to subsequently amortize the deferred debt issuance costs ratably over the term of the line of credit arrangement. These new standards are effective for annual and interim reporting periods beginning after December 15, 2015. Frontier has elected to early adopt these standards. As of December 31, 2014, Frontier reclassified $93 million of debt issuance costs from “Other Assets” to “Long-term debt” in the Consolidated Balance Sheet. Classification of Deferred Taxes In November 2015, the FASB issued ASU No. 2015-17, “Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes.” This standard eliminates the requirement to classify deferred tax assets and liabilities as noncurrent or current within a classified statement of financial position. Under ASU No. 2015-17, a reporting entity is required to classify deferred tax assets and liabilities as noncurrent in a classified statement of financial position. Current guidance requiring the offsetting of deferred tax assets and liabilities of a tax-paying component of an entity and presentation as a single noncurrent amount is not affected. The amendment applies to all entities that present a classified statement of financial position. This new standard is effective for annual and interim reporting periods beginning after December 15, 2016. Frontier has elected to early adopt this standard. As of December 31, 2014, Frontier reclassified $71 million of deferred tax assets from "Income taxes and other current assets" to "Deferred income taxes" in the Consolidated Balance Sheet. Employee Benefit Plans In July 2015, the FASB issued ASU No. 2015-12, “Plan Accounting: Defined Benefit Pension Plans (Topic 960), Defined Contribution Pension Plans (Topic 962), and Health and Welfare Benefit Plans (Topic 965)”: There are three parts to the ASU that aim to simplify the accounting and presentation of plan accounting. Part I of this ASU requires fully benefit-responsive investment contracts to be measured at contract value instead of the current fair value measurement. Part II of this ASU requires investments (both participant-directed and nonparticipant-directed investments) of employee benefit plans be grouped only by general type, eliminating the need to disaggregate the investments in multiple ways. Part III of this ASU provides a similar measurement date practical expedient for employee benefit plans as available in ASU No. 2015-04, “Compensation – Retirement Benefits (Topic 715),” which allows employers to measure defined benefit plan assets on a month-end date that is nearest to the year’s fiscal year-end when the fiscal period does not coincide with a month-end. Parts I and II of the new guidance should be applied on a retrospective basis. Part III of the new guidance should be applied on a prospective basis. This ASU is effective for fiscal years beginning after December 15, 2015, and for interim periods within those fiscal years. The adoption is not expected to have a material impact on Frontier’s Consolidated Financial Statements.

(2) Recent Accounting Pronouncements:

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 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 is effective for annual and interim reporting periods beginning after December 15, 2017. Companies are also permitted to voluntarily adopt the new standard as of the original effective date that was for annual reporting periods beginning after December 15, 2016. 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. Frontier is currently evaluating the impact of adopting the new standard, but has not yet selected a transition method or determined the impact of adoption on its consolidated financial statements.

Debt Issuance Costs

In April 2015, the FASB issued ASU No. 2015-03, “Interest – Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs.” This standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. In August 2015, the FASB issued ASU No. 2015-15, “Interest – Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line of Credit Arrangements”. This standard permits an entity to defer and present debt issuance costs related to line of credit arrangements as an asset and to subsequently amortize the deferred debt issuance costs ratably over the term of the line of credit arrangement. These new standards are effective for annual and interim reporting periods beginning after December 15, 2015. Frontier has elected to early adopt these standards. As of December 31, 2014, Frontier reclassified $93 million of debt issuance costs from “Other Assets” to “Long-term debt” in the Consolidated Balance Sheet.

Classification of Deferred Taxes

In November 2015, the FASB issued ASU No. 2015-17, “Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes.” This standard eliminates the requirement to classify deferred tax assets and liabilities as noncurrent or current within a classified statement of financial position. Under ASU No. 2015-17, a reporting entity is required to classify deferred tax assets and liabilities as noncurrent in a classified statement of financial position. Current guidance requiring the offsetting of deferred tax assets and liabilities of a tax-paying component of an entity and presentation as a single noncurrent amount is not affected. The amendment applies to all entities that present a classified statement of financial position. This new standard is effective for annual and interim reporting periods beginning after December 15, 2016. Frontier has elected to early adopt this standard. As of December 31, 2014, Frontier reclassified $71 million of deferred tax assets from "Income taxes and other current assets" to "Deferred income taxes" in the Consolidated Balance Sheet.

Employee Benefit Plans

In July 2015, the FASB issued ASU No. 2015-12, “Plan Accounting: Defined Benefit Pension Plans (Topic 960), Defined Contribution Pension Plans (Topic 962), and Health and Welfare Benefit Plans (Topic 965)”: There are three parts to the ASU that aim to simplify the accounting and presentation of plan accounting. Part I of this ASU requires fully benefit-responsive investment contracts to be measured at contract value instead of the current fair value measurement. Part II of this ASU requires investments (both participant-directed and nonparticipant-directed investments) of employee benefit plans be grouped only by general type, eliminating the need to disaggregate the investments in multiple ways. Part III of this ASU provides a similar measurement date practical expedient for employee benefit plans as available in ASU No. 2015-04, “Compensation – Retirement Benefits (Topic 715),” which allows employers to measure defined benefit plan assets on a month-end date that is nearest to the year’s fiscal year-end when the fiscal period does not coincide with a month-end. Parts I and II of the new guidance should be applied on a retrospective basis. Part III of the new guidance should be applied on a prospective basis. This ASU is effective for fiscal years beginning after December 15, 2015, and for interim periods within those fiscal years. The adoption is not expected to have a material impact on Frontier’s Consolidated Financial Statements.