New Pronouncements - (Policies)	6 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]
New Pronouncements	New Pronouncements In February 2018, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2018-02 "Income Statement - Reporting Comprehensive Income (Topic 220)." Under existing U.S. generally accepted accounting principles, the effects of changes in tax rates and laws on deferred tax balances are recorded as a component of income tax expense in the period in which the law was enacted. When deferred tax balances related to items originally recorded in accumulated other comprehensive income are adjusted, certain tax effects become stranded in accumulated other comprehensive income. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017. The amendments in this ASU also require certain disclosures about stranded tax effects. The guidance is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption in any period is permitted. The Company’s provisional adjustments recorded in 2017 to account for the impact of the Tax Cuts and Jobs Act resulted in stranded tax effects. The Company is currently evaluating the timing and impact of adopting ASU 2018-02. In May 2017, the FASB issued ASU 2017-09 “Compensation - Stock Compensation (Topic 718),” which clarifies when a change to terms or conditions of a share-based payment award must be accounted for as a modification. The new guidance requires modification accounting if the vesting condition, fair value or the award classification is not the same both before and after a change to the terms and conditions of the award. The new guidance was adopted on a prospective basis on January 1, 2018. The adoption of this standard did not have an impact on the Company's consolidated financial statements. In March 2017, the FASB issued ASU 2017-07 “Compensation - Retirement Benefits (Topic 715),” which changes the presentation of defined benefit and post-retirement benefit plan expense on the income statement by requiring separation between operating and non-operating expense. Under the ASU, the service cost of net periodic benefit expense is an operating expense that will be reported with similar compensation costs. The non-operating components, which include all other components of net periodic benefit expense, are reported outside of operating income. The ASU also stipulates that only the service cost component of pension and postretirement (benefits) costs is eligible for capitalization. The ASU was adopted by the Company on January 1, 2018. Application was done retrospectively for the presentation of the components of these (benefits) costs. In the Consolidated Statements of Operations, the Company previously recorded service and other (benefits) costs in operating cost and expense accounts along with compensation costs. The adoption of the standard resulted in reclassification of those (benefits) costs to the other pension and postretirement (benefits) costs line in the Consolidated Statements of Operations. Adoption of the standard increased operating earnings for 2018 by $8.0 million in both the three- and six-month periods ending June 30, 2018. Those amounts are established in other pension and postretirement (benefits) costs. In the three- and six-month periods ending June 30, 2017 operating earnings were increased by $0.2 million and $0.3 million, respectively. A corresponding amount was reclassified to other pension and postretirement (benefits) costs. The specific net periodic benefit components are disclosed in Note 3 "Employee Benefit Plans." In January 2017, the FASB issued ASU 2017-04 "Intangibles - Goodwill and Other (Topic 350)." The update requires a single-step quantitative test to measure potential impairment based on the excess of a reporting unit's carrying amount over its fair value. A qualitative assessment can still be completed first for an entity to determine if a quantitative impairment test is necessary. The ASU is effective for fiscal year 2021 and is to be adopted on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. In February 2016, the FASB issued ASU 2016-02 "Leases (Topic 842)," which requires lessees to record most leases on their balance sheets. Lessees initially recognize a lease liability (measured at the present value of the lease payments over the lease term) and a right-of-use ("ROU") asset (measured at the lease liability amount, adjusted for lease prepayments, lease incentives received and the lessee's initial direct costs). Lessees can make an accounting policy election not to recognize ROU assets and lease liabilities for leases with a lease term of 12 months or less as long as the leases do not include options to purchase the underlying assets that the lessee is reasonably certain to exercise. For lessors, the guidance modifies the classification criteria and the accounting for sales-type and direct financing leases. The standard requires the use of a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. Full retrospective application is prohibited.The Company plans to adopt the ASU beginning on the effective date of January 1, 2019. The Company expects that upon adoption the consolidated balance sheet will increase for the recognition of right of use assets and lease liabilities for operating leases. The Company is currently reviewing all of the available practical expedients for transition and is evaluating the impact that the adoption of this guidance will have on its financial condition, results of operations and the presentation of its consolidated financial statements. In May 2014, the FASB issued ASU 2014-09 "Revenue from Contracts with Customers (Topic 606)." ASU 2014-09 provides a single principles-based, five-step model to be applied to all contracts with customers. The five steps are to identify the contract(s) with the customer, to identify the performance obligations in the contract, to determine the transaction price, to allocate the transaction price to the performance obligations in the contract and to recognize revenue when each performance obligation is satisfied. Revenue will be recognized when promised goods or services are transferred to the customer in an amount that reflects the consideration expected in exchange for those goods or services. In addition, the standard requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. During 2016, the FASB issued additional ASU’s which enhanced the originally issued guidance. These ASU’s encompassed narrow scope improvements and practical expedients along with providing further clarifications. Effective January 1, 2018, the Company adopted ASU 2014-09 using the modified retrospective method, which resulted in an immaterial impact. For a complete discussion of the adoption of ASU 2014-09, see Note 11 "Revenue Recognition."

New Pronouncements

In February 2018, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2018-02 "Income Statement - Reporting Comprehensive Income (Topic 220)." Under existing U.S. generally accepted accounting principles, the effects of changes in tax rates and laws on deferred tax balances are recorded as a component of income tax expense in the period in which the law was enacted. When deferred tax balances related to items originally recorded in accumulated other comprehensive income are adjusted, certain tax effects become stranded in accumulated other comprehensive income. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017. The amendments in this ASU also require certain disclosures about stranded tax effects. The guidance is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption in any period is permitted. The Company’s provisional adjustments recorded in 2017 to account for the impact of the Tax Cuts and Jobs Act resulted in stranded tax effects. The Company is currently evaluating the timing and impact of adopting ASU 2018-02.

In May 2017, the FASB issued ASU 2017-09 “Compensation - Stock Compensation (Topic 718),” which clarifies when a change to terms or conditions of a share-based payment award must be accounted for as a modification. The new guidance requires modification accounting if the vesting condition, fair value or the award classification is not the same both before and after a change to the terms and conditions of the award. The new guidance was adopted on a prospective basis on January 1, 2018. The adoption of this standard did not have an impact on the Company's consolidated financial statements.

In March 2017, the FASB issued ASU 2017-07 “Compensation - Retirement Benefits (Topic 715),” which changes the presentation of defined benefit and post-retirement benefit plan expense on the income statement by requiring separation between operating and non-operating expense. Under the ASU, the service cost of net periodic benefit expense is an operating expense that will be reported with similar compensation costs. The non-operating components, which include all other components of net periodic benefit expense, are reported outside of operating income. The ASU also stipulates that only the service cost component of pension and postretirement (benefits) costs is eligible for capitalization. The ASU was adopted by the Company on January 1, 2018. Application was done retrospectively for the presentation of the components of these (benefits) costs. In the Consolidated Statements of Operations, the Company previously recorded service and other (benefits) costs in operating cost and expense accounts along with compensation costs. The adoption of the standard resulted in reclassification of those (benefits) costs to the other pension and postretirement (benefits) costs line in the Consolidated Statements of Operations. Adoption of the standard increased operating earnings for 2018 by $8.0 million in both the three- and six-month periods ending June 30, 2018. Those amounts are established in other pension and postretirement (benefits) costs. In the three- and six-month periods ending June 30, 2017 operating earnings were increased by $0.2 million and $0.3 million, respectively. A corresponding amount was reclassified to other pension and postretirement (benefits) costs. The specific net periodic benefit components are disclosed in Note 3 "Employee Benefit Plans."

In January 2017, the FASB issued ASU 2017-04 "Intangibles - Goodwill and Other (Topic 350)." The update requires

a single-step quantitative test to measure potential impairment based on the excess of a reporting unit's carrying amount over its fair value. A qualitative assessment can still be completed first for an entity to determine if a quantitative impairment test is necessary. The ASU is effective for fiscal year 2021 and is to be adopted on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017.

In February 2016, the FASB issued ASU 2016-02 "Leases (Topic 842)," which requires lessees to record most leases on their balance sheets. Lessees initially recognize a lease liability (measured at the present value of the lease payments over the lease term) and a right-of-use ("ROU") asset (measured at the lease liability amount, adjusted for lease prepayments, lease incentives received and the lessee's initial direct costs). Lessees can make an accounting policy election not to recognize ROU assets and lease liabilities for leases with a lease term of 12 months or less as long as the leases do not include options to purchase the underlying assets that the lessee is reasonably certain to exercise. For lessors, the guidance modifies the classification criteria and the accounting for sales-type and direct financing leases. The standard requires the use of a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. Full retrospective application is prohibited.The Company plans to adopt the ASU beginning on the effective date of January 1, 2019. The Company expects that upon adoption the consolidated balance sheet will increase for the recognition of right of use assets and lease liabilities for operating leases. The Company is currently reviewing all of the available practical expedients for transition and is evaluating the impact that the adoption of this guidance will have on its financial condition, results of operations and the presentation of its consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09 "Revenue from Contracts with Customers (Topic 606)." ASU 2014-09 provides a single principles-based, five-step model to be applied to all contracts with customers. The five steps are to identify the contract(s) with the customer, to identify the performance obligations in the contract, to determine the transaction price, to allocate the transaction price to the performance obligations in the contract and to recognize revenue when each performance obligation is satisfied. Revenue will be recognized when promised goods or services are transferred to the customer in an amount that reflects the consideration expected in exchange for those goods or services. In addition, the standard requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. During 2016, the FASB issued additional ASU’s which enhanced the originally issued guidance. These ASU’s encompassed narrow scope improvements and practical expedients along with providing further clarifications. Effective January 1, 2018, the Company adopted ASU 2014-09 using the modified retrospective method, which resulted in an immaterial impact. For a complete discussion of the adoption of ASU 2014-09, see Note 11 "Revenue Recognition."