Significant Accounting Policies	3 Months Ended
Mar. 31, 2018
Accounting Policies [Abstract]
Significant Accounting Policies	Note 1 — Significant Accounting Policies In these notes, the terms “Hexcel,” “the Company,” “we,” “us,” or “our” mean Hexcel Corporation and subsidiary companies. The accompanying Condensed Consolidated Financial statements are those of Hexcel Corporation. Refer to Note 1 to the consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2017 for a discussion of our significant accounting policies. Significant changes to our accounting policies subsequent to the filing of our Form 10-K, relate solely to the adoption of Topic 606, Revenue from Contracts with Customers, are discussed below in Recent Accounting Pronouncements as well as in Note 9. Basis of Presentation The accompanying Condensed Consolidated Financial Statements have been prepared from the unaudited accounting records of Hexcel pursuant to rules and regulations of the Securities and Exchange Commission (“SEC”) and in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information. Certain information and footnote disclosures normally included in financial statements have been omitted pursuant to rules and regulations of the SEC. In the opinion of management, the Condensed Consolidated Financial Statements include all normal recurring adjustments as well as any non-recurring adjustments necessary to present fairly the statement of financial position, results of operations and cash flows for the interim periods presented. The Condensed Consolidated Balance Sheet as of December 31, 2017 was derived from the audited 2017 consolidated balance sheet. Interim results are not necessarily indicative of results expected for any other interim period or for the full year. These consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our 2017 Annual Report on Form 10-K. Within the Unaudited Condensed Consolidated Statement of Cash Flows for the quarter ended March 31, 2017, borrowings and repayments related to our revolving credit facility previously presented net within financing activities have been presented gross to conform to the current year presentation. Investments in Affiliated Companies At March 31, 2018, we had a 50% equity ownership investment in a joint venture Aerospace Composites Malaysia Sdn. Bhd. (“ACM”). This investment is accounted for using the equity method of accounting. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update No. 2014-09 (ASU 2014-09), Revenue from Contracts with Customers (“ASC 606”). The update clarifies the principles for recognizing revenue and develops a common revenue standard for all industries. We adopted this new standard January 1, 2018, using the modified retrospective method. As a result of adopting this guidance under the modified retrospective method we adjusted the opening balance of our retained earnings by approximately $3.8 million, which represented the cumulative net earnings effect of revenue recognized over time prior to the date of adoption, related to those contracts whose performance obligations were not fully satisfied by the adoption date. In February 2016, the FASB issued Accounting Standards Update No. 2016-02 (ASU 2016-02), Leases. This ASU requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases, with the exception of short-term leases. The Company will adopt this standard on January 1, 2019. We are currently evaluating the impact of adopting this guidance on our consolidated balance sheets, results of operations and financial condition. In August of 2016, the FASB issued Accounting Standards Update No. 2016-15 (ASU 2016-15) Classification of Certain Cash Receipts and Cash Payments which clarifies the classification of certain types of cash flows. The Company adopted this standard during the quarter ended March 31, 2018. There was no material impact on the Company’s Consolidated Statements of Cash Flows. In March 2017, the FASB issued Accounting Standards Update No. 2017-07 (ASU 2017-07), Compensation-Retirement Benefits, that amends the presentation of net periodic pension cost and net periodic postretirement benefit cost. This amendment requires entities to disaggregate the service cost component from the other components of net periodic benefit cost, to report the service cost component in the same line item as other compensation costs and to report the other components of net periodic benefit cost separately as a line item below operating income on our statement of operations. In addition, capitalization of net periodic benefit cost in assets is limited to the service cost component. We adopted this amendment on January 1, 2018. The adoption did not have a material impact to our financial statements or disclosures. In August 2017, the FASB issued Accounting Standards Update No. 2017-12 (ASU 2017-12), Targeted Improvement to Accounting for Hedging Activities, which better aligns hedge accounting with an organization’s risk management activities in the financial statements. In addition, the standard simplified the application of hedge accounting guidance in areas where practice issues exist. We adopted this standard on January 1, 2018, with no material impact to our results of operations, or financial position. In February 2018, the FASB issued Accounting Standards Update No. 2018-02 (ASU 2018-02), Income Statement—Reporting Comprehensive Income (Topic 220), which amends the previous guidance to allow for certain tax effects “stranded” in accumulated other comprehensive income, which are impacted by the Tax Cuts and Jobs Act (the “Act”), to be reclassified from accumulated other comprehensive income into retained earnings. This amendment pertains only to those items impacted by the new tax law and will not apply to any future tax effects stranded in accumulated other comprehensive income. This standard is effective for fiscal years beginning after December 15, 2018, and allows for early adoption. The Company elected to early adopt this standard during the quarter ended March 31, 2018. As a result of the adoption of this standard the Company reduced the opening balance of retained earnings by approximately $1.6 million.

Note 1 — Significant Accounting Policies

In these notes, the terms “Hexcel,” “the Company,” “we,” “us,” or “our” mean Hexcel Corporation and subsidiary companies. The accompanying Condensed Consolidated Financial statements are those of Hexcel Corporation. Refer to Note 1 to the consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2017 for a discussion of our significant accounting policies. Significant changes to our accounting policies subsequent to the filing of our Form 10-K, relate solely to the adoption of Topic 606, Revenue from Contracts with Customers, are discussed below in Recent Accounting Pronouncements as well as in Note 9.

Basis of Presentation

The accompanying Condensed Consolidated Financial Statements have been prepared from the unaudited accounting records of Hexcel pursuant to rules and regulations of the Securities and Exchange Commission (“SEC”) and in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information. Certain information and footnote disclosures normally included in financial statements have been omitted pursuant to rules and regulations of the SEC. In the opinion of management, the Condensed Consolidated Financial Statements include all normal recurring adjustments as well as any non-recurring adjustments necessary to present fairly the statement of financial position, results of operations and cash flows for the interim periods presented. The Condensed Consolidated Balance Sheet as of December 31, 2017 was derived from the audited 2017 consolidated balance sheet. Interim results are not necessarily indicative of results expected for any other interim period or for the full year. These consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our 2017 Annual Report on Form 10-K. Within the Unaudited Condensed Consolidated Statement of Cash Flows for the quarter ended March 31, 2017, borrowings and repayments related to our revolving credit facility previously presented net within financing activities have been presented gross to conform to the current year presentation.

Investments in Affiliated Companies

At March 31, 2018, we had a 50% equity ownership investment in a joint venture Aerospace Composites Malaysia Sdn. Bhd. (“ACM”). This investment is accounted for using the equity method of accounting.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update No. 2014-09 (ASU 2014-09), Revenue from Contracts with Customers (“ASC 606”). The update clarifies the principles for recognizing revenue and develops a common revenue standard for all industries. We adopted this new standard January 1, 2018, using the modified retrospective method. As a result of adopting this guidance under the modified retrospective method we adjusted the opening balance of our retained earnings by approximately $3.8 million, which represented the cumulative net earnings effect of revenue recognized over time prior to the date of adoption, related to those contracts whose performance obligations were not fully satisfied by the adoption date.

In February 2016, the FASB issued Accounting Standards Update No. 2016-02 (ASU 2016-02), Leases. This ASU requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases, with the exception of short-term leases. The Company will adopt this standard on January 1, 2019. We are currently evaluating the impact of adopting this guidance on our consolidated balance sheets, results of operations and financial condition.

In August of 2016, the FASB issued Accounting Standards Update No. 2016-15 (ASU 2016-15) Classification of Certain Cash Receipts and Cash Payments which clarifies the classification of certain types of cash flows. The Company adopted this standard during the quarter ended March 31, 2018. There was no material impact on the Company’s Consolidated Statements of Cash Flows.

In March 2017, the FASB issued Accounting Standards Update No. 2017-07 (ASU 2017-07), Compensation-Retirement Benefits, that amends the presentation of net periodic pension cost and net periodic postretirement benefit cost. This amendment requires entities to disaggregate the service cost component from the other components of net periodic benefit cost, to report the service cost component in the same line item as other compensation costs and to report the other components of net periodic benefit cost separately as a line item below operating income on our statement of operations. In addition, capitalization of net periodic benefit cost in assets is limited to the service cost component. We adopted this amendment on January 1, 2018. The adoption did not have a material impact to our financial statements or disclosures.

In August 2017, the FASB issued Accounting Standards Update No. 2017-12 (ASU 2017-12), Targeted Improvement to Accounting for Hedging Activities, which better aligns hedge accounting with an organization’s risk management activities in the financial statements. In addition, the standard simplified the application of hedge accounting guidance in areas where practice issues exist. We adopted this standard on January 1, 2018, with no material impact to our results of operations, or financial position.

In February 2018, the FASB issued Accounting Standards Update No. 2018-02 (ASU 2018-02), Income Statement—Reporting Comprehensive Income (Topic 220), which amends the previous guidance to allow for certain tax effects “stranded” in accumulated other comprehensive income, which are impacted by the Tax Cuts and Jobs Act (the “Act”), to be reclassified from accumulated other comprehensive income into retained earnings. This amendment pertains only to those items impacted by the new tax law and will not apply to any future tax effects stranded in accumulated other comprehensive income. This standard is effective for fiscal years beginning after December 15, 2018, and allows for early adoption. The Company elected to early adopt this standard during the quarter ended March 31, 2018. As a result of the adoption of this standard the Company reduced the opening balance of retained earnings by approximately $1.6 million.