Summary Of Significant Accounting Policies	9 Months Ended
Oct. 01, 2017
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	Summary of Significant Accounting Policies The significant accounting policies used in preparation of these condensed consolidated financial statements for the nine months ended October 1, 2017 are consistent with those discussed in Note 2 to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2016. New Accounting Standards - Not yet Adopted On May 10, 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting, which clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the new guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award changes as a result of the change in terms or conditions. The amendments in this ASU also clarify that no new measurement date will be required if an award is not probable of vesting at the time a change is made and there is no change to the fair value, vesting conditions, and classification. The amendments in this ASU are effective for public business entities for annual periods beginning after December 15, 2017, including interim periods within those annual periods. We intend to adopt the standard prospectively and have not yet determined its impact on our consolidated financial statements. In March 2017, the FASB issued ASU 2017-07, Compensation—Retirement Benefits (Topic 715), which improves the consistency, transparency, and usefulness of the service cost and net benefit cost financial information components. The amendments in this ASU amend presentation requirements of service cost and other components of net benefit cost in the income statement. In addition, the ASU allows only the service cost component of net benefit cost to be eligible for capitalization. The amendments in this ASU are effective for public business entities for annual periods beginning after December 15, 2017, including interim periods within those annual periods. We intend to adopt the standard prospectively and have not yet determined its impact on our consolidated financial statements. In March 2016, the FASB issued ASU 2016-02, Leases. ASU 2016-02 outlines a model for lessees by recognizing all lease-related assets and liabilities on the balance sheet. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early application is permitted for all entities. ASU 2016-02 requires a modified retrospective approach for all leases existing at, or entered into after, the date of initial application, with an option to elect to use certain transition relief. We are still evaluating the requirements of ASU 2016-02 to determine the impact it will have on our consolidated financial statements but expect the standard to have a material impact on our assets and liabilities for the addition of right-of-use assets with corresponding lease liabilities. We intend to adopt this new standard on January 1, 2019. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 provides for a single comprehensive model to use in accounting for revenue arising from contracts with customers and will replace most existing revenue recognition guidance in Generally Accepted Accounting Principles ("GAAP") when it becomes effective. ASU 2014-09 is effective for fiscal years and interim periods within those years, beginning after December 15, 2017. ASU 2014-09 allows for adoption either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying the ASU recognized as an adjustment to the opening balance of retained earnings at the date of initial application. Subsequent to the issuance of the ASU 2014-09, the FASB issued additional updates relating to reporting revenue on a gross versus net basis, identifying performance obligations and licensing arrangements, narrow-scope improvements and practical expedients, technical corrections and improvements, and service concession arrangements. In the first quarter of 2017, we established a cross-functional implementation team including representatives from general management, sales, legal, and finance. We deployed a detailed approach to analyze the impact of the standard on our customer contract portfolio by comparing our current accounting policies and practices to identify potential differences that would result from applying the new standard. In addition, we identified potential changes to our business processes and controls to support recognition and disclosure under the new standard. In the second and third quarters of 2017, we made progress toward completing our evaluation of the potential changes from adopting the new standard on our future financial reporting and disclosures. Activities performed during the second and third quarters included: reviewing and understanding our customer terms and conditions, drafting a new revenue recognition policy, and training our finance professionals in the new standard. We continue to analyze our customer contracts and customized product offerings to determine which customer arrangements would require revenue recognition over time, i.e., on a percentage of completion accounting basis. This would be a change to our current revenue recognition model for many of our businesses. Based on our preliminary evaluation, we believe a portion of our large projects business and certain other businesses that provide customized products to U.S. military customers, may require revenue recognition over time under the new standard. We continue to evaluate whether the new standard will have a material impact on our consolidated financial statements. We intend to adopt this new standard on January 1, 2018 and anticipate using the modified retrospective method. We continue to closely monitor FASB activity related to the new standard, as well as working with finance and legal advisors on specific interpretative issues. The implementation team has reported the findings and progress of the project to management and the Audit Committee of our Board of Directors.

Summary of Significant Accounting Policies

The significant accounting policies used in preparation of these condensed consolidated financial statements for the nine months ended October 1, 2017 are consistent with those discussed in Note 2 to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2016.

New Accounting Standards - Not yet Adopted

On May 10, 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting, which clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the new guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award changes as a result of the change in terms or conditions. The amendments in this ASU also clarify that no new measurement date will be required if an award is not probable of vesting at the time a change is made and there is no change to the fair value, vesting conditions, and classification. The amendments in this ASU are effective for public business entities for annual periods beginning after December 15, 2017, including interim periods within those annual periods. We intend to adopt the standard prospectively and have not yet determined its impact on our consolidated financial statements.

In March 2017, the FASB issued ASU 2017-07, Compensation—Retirement Benefits (Topic 715), which improves the consistency, transparency, and usefulness of the service cost and net benefit cost financial information components. The amendments in this ASU amend presentation requirements of service cost and other components of net benefit cost in the income statement. In addition, the ASU allows only the service cost component of net benefit cost to be eligible for capitalization. The amendments in this ASU are effective for public business entities for annual periods beginning after December 15, 2017, including interim periods within those annual periods. We intend to adopt the standard prospectively and have not yet determined its impact on our consolidated financial statements.

In March 2016, the FASB issued ASU 2016-02, Leases. ASU 2016-02 outlines a model for lessees by recognizing all lease-related assets and liabilities on the balance sheet. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early application is permitted for all entities. ASU 2016-02 requires a modified retrospective approach for all leases existing at, or entered into after, the date of initial application, with an option to elect to use certain transition relief. We are still evaluating the requirements of ASU 2016-02 to determine the impact it will have on our consolidated financial statements but expect the standard to have a material impact on our assets and liabilities for the addition of right-of-use assets with corresponding lease liabilities. We intend to adopt this new standard on January 1, 2019.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 provides for a single comprehensive model to use in accounting for revenue arising from contracts with customers and will replace most existing revenue recognition guidance in Generally Accepted Accounting Principles ("GAAP") when it becomes effective. ASU 2014-09 is effective for fiscal years and interim periods within those years, beginning after December 15, 2017. ASU 2014-09 allows for adoption either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying the ASU recognized as an adjustment to the opening balance of retained earnings at the date of initial application. Subsequent to the issuance of the ASU 2014-09, the FASB issued additional updates relating to reporting revenue on a gross versus net basis, identifying performance obligations and licensing arrangements, narrow-scope improvements and practical expedients, technical corrections and improvements, and service concession arrangements.

In the first quarter of 2017, we established a cross-functional implementation team including representatives from general management, sales, legal, and finance. We deployed a detailed approach to analyze the impact of the standard on our customer contract portfolio by comparing our current accounting policies and practices to identify potential differences that would result from applying the new standard. In addition, we identified potential changes to our business processes and controls to support recognition and disclosure under the new standard.

In the second and third quarters of 2017, we made progress toward completing our evaluation of the potential changes from adopting the new standard on our future financial reporting and disclosures. Activities performed during the second and third quarters included: reviewing and understanding our customer terms and conditions, drafting a new revenue recognition policy, and training our finance professionals in the new standard.

We continue to analyze our customer contracts and customized product offerings to determine which customer arrangements would require revenue recognition over time, i.e., on a percentage of completion accounting basis. This would be a change to our current revenue recognition model for many of our businesses. Based on our preliminary evaluation, we believe a portion of our large projects business and certain other businesses that provide customized products to U.S. military customers, may require revenue recognition over time under the new standard. We continue to evaluate whether the new standard will have a material impact on our consolidated financial statements. We intend to adopt this new standard on January 1, 2018 and anticipate using the modified retrospective method.

We continue to closely monitor FASB activity related to the new standard, as well as working with finance and legal advisors on specific interpretative issues. The implementation team has reported the findings and progress of the project to management and the Audit Committee of our Board of Directors.