New Pronouncements	9 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]
New Pronouncements	New Pronouncements In August 2018, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2018-13 "Fair Value Measurement (Topic 820)," which is designed to improve the effectiveness of disclosures related to fair value measurements. This ASU is effective for annual periods beginning after December 15, 2019 and early adoption is allowed in any interim reporting periods within those annual reporting periods. The Company is currently assessing the impact that this ASU will have on its consolidated financial statements. In February 2018, the FASB issued ASU 2018-02 "Income Statement - Reporting Comprehensive (Loss) Income (Topic 220)." Under existing U.S. GAAP, 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 (loss) income are adjusted, certain tax effects become stranded in accumulated other comprehensive (loss) income. The Company’s provisional adjustments recorded in 2017 to account for the impact of the Tax Cuts and Jobs Act resulted in such stranded tax effects. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive (loss) income to reinvested earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017. The guidance is effective for annual years beginning after December 15, 2018 with early adoption permitted in any interim reporting period. The Company elected to early-adopt this standard in the quarter ended September 30, 2018. This election resulted in a reclassification of $1.7 million from accumulated other comprehensive income (loss) to reinvested earnings. 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 a significant 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 $11.8 and $19.8 million in the three- and nine-month periods ending September 30, 2018. In the three-month period ending September 30, 2017 operating earnings were decreased by $0.1 million. In the nine-month period ending September 30, 2017 operating earnings were increased by $0.2 million. A corresponding amount was reclassified to other pension and postretirement (benefits) costs for each of these periods. 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 on a prospective basis for annual periods beginning after December 15, 2019 and interim periods thereafter. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not anticipate that the adoption of ASU 2017-04 will have an impact. In August 2016, the FASB issued ASU No. 2016-15 "Statement of Cash Flows (Topic 230)," which clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows. This ASU was effective for annual periods beginning after December 15, 2017, including interim periods within those annual reporting periods. The adoption of this ASU did not have a significant impact on the categorization of operating, investing and financing activities on the Consolidated Statements of Cash Flows. 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 includes 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. In July 2018, the FASB issued ASU No. 2018-11 "Targeted Improvements (Topic 842)." This ASU provides for an optional method of transition which allows companies to adopt the new leasing standard with a cumulative-effect adjustment to reinvested earnings. Under this transition method, comparative periods would continue to be reported in accordance with the existing lease guidance under ASC 840 "Leases". The Company plans to adopt the ASU with this optional transition methodology 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 ROU assets and lease liabilities for operating leases. The Company is currently making decisions regarding 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.

New Pronouncements

In August 2018, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2018-13 "Fair Value Measurement (Topic 820)," which is designed to improve the effectiveness of disclosures related to fair value measurements. This ASU is effective for annual periods beginning after December 15, 2019 and early adoption is allowed in any interim reporting periods within those annual reporting periods. The Company is currently assessing the impact that this ASU will have on its consolidated financial statements.

In February 2018, the FASB issued ASU 2018-02 "Income Statement - Reporting Comprehensive (Loss) Income (Topic 220)." Under existing U.S. GAAP, 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 (loss) income are adjusted, certain tax effects become stranded in accumulated other comprehensive (loss) income. The Company’s provisional adjustments recorded in 2017 to account for the impact of the Tax Cuts and Jobs Act resulted in such stranded tax effects. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive (loss) income to reinvested earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017. The guidance is effective for annual years beginning after December 15, 2018 with early adoption permitted in any interim reporting period. The Company elected to early-adopt this standard in the quarter ended September 30, 2018. This election resulted in a reclassification of $1.7 million from accumulated other comprehensive income (loss) to reinvested earnings.

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 a significant 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 $11.8 and $19.8 million in the three- and nine-month periods ending September 30, 2018. In the three-month period ending September 30, 2017 operating earnings were decreased by $0.1 million. In the nine-month period ending September 30, 2017 operating earnings were increased by $0.2 million. A corresponding amount was reclassified to other pension and postretirement (benefits) costs for each of these periods. 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 on a prospective basis for annual periods beginning after December 15, 2019 and interim periods thereafter. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not anticipate that the adoption of ASU 2017-04 will have an impact.

In August 2016, the FASB issued ASU No. 2016-15 "Statement of Cash Flows (Topic 230)," which clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows. This ASU was effective for annual periods beginning after December 15, 2017, including interim periods within those annual reporting periods. The adoption of this ASU did not have a significant impact on the categorization of operating, investing and financing activities on the Consolidated Statements of Cash Flows.

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 includes 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. In July 2018, the FASB issued ASU No. 2018-11 "Targeted Improvements (Topic 842)." This ASU provides for an optional method of transition which allows companies to adopt the new leasing standard with a cumulative-effect adjustment to reinvested earnings. Under this transition method, comparative periods would continue to be reported in accordance with the existing lease guidance under ASC 840 "Leases". The Company plans to adopt the ASU with this optional transition methodology 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 ROU assets and lease liabilities for operating leases. The Company is currently making decisions regarding 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.