Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	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, cash flows and statement of stockholder’s equity for the interim periods presented. The Condensed Consolidated Balance Sheet as of December 31, 2018 was derived from the audited 2018 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 2018 Annual Report on Form 10-K. Within the Unaudited Condensed Consolidated Balance Sheets as of December 31, 2018, property, plant and equipment and the related accumulated depreciation have been grossed up to conform to the current year presentation.
Investments in Affiliated Companies	Investments in Affiliated Companies We have a 50% equity investment in Aerospace Composites Malaysia Sdn. Bhd. (“ACM”) and a 25% equity investment in Hexcut Services. These investments are accounted for using the equity method of accounting.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update No. 2016-02 (ASU 2016-02), Leases (Topic 842). This standard requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases, with the exception of leases with a duration of one year or less. We adopted the provisions of this standard on January 1, 2019, using the modified transition method which allows companies to recognize existing leases at the adoption date without requiring comparable presentation. As a result of the adoption of this standard we recognized approximately $50 million of right of use assets and related liabilities for operating leases that existed prior to January 1, 2019. These right of use assets were recorded in noncurrent assets, and the related liabilities were recorded in other accrued liabilities and other noncurrent liabilities. See Note 4 - Leases, for more details. In August 2018 the FASB issued Accounting Standards Update No. 2018-14 (ASU 2018-14), Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20), which amends the current disclosure requirements regarding defined benefit pensions and other post retirement plans, and allows for the removal of certain disclosures, while adding certain new disclosure requirements. This standard is effective for fiscal years beginning after December 15, 2020 and allows for early adoption. We do not expect this new standard to have a significant impact to our disclosures.

Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2019

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, cash flows and statement of stockholder’s equity for the interim periods presented. The Condensed Consolidated Balance Sheet as of December 31, 2018 was derived from the audited 2018 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 2018 Annual Report on Form 10-K. Within the Unaudited Condensed Consolidated Balance Sheets as of December 31, 2018, property, plant and equipment and the related accumulated depreciation have been grossed up to conform to the current year presentation.

Investments in Affiliated Companies

We have a 50% equity investment in Aerospace Composites Malaysia Sdn. Bhd. (“ACM”) and a 25% equity investment in Hexcut Services. These investments are accounted for using the equity method of accounting.

Recent Accounting Pronouncements

In February 2016, the FASB issued Accounting Standards Update No. 2016-02 (ASU 2016-02), Leases (Topic 842). This standard requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases, with the exception of leases with a duration of one year or less. We adopted the provisions of this standard on January 1, 2019, using the modified transition method which allows companies to recognize existing leases at the adoption date without requiring comparable presentation. As a result of the adoption of this standard we recognized approximately $50 million of right of use assets and related liabilities for operating leases that existed prior to January 1, 2019. These right of use assets were recorded in noncurrent assets, and the related liabilities were recorded in other accrued liabilities and other noncurrent liabilities. See Note 4 - Leases, for more details.

In August 2018 the FASB issued Accounting Standards Update No. 2018-14 (ASU 2018-14), Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20), which amends the current disclosure requirements regarding defined benefit pensions and other post retirement plans, and allows for the removal of certain disclosures, while adding certain new disclosure requirements. This standard is effective for fiscal years beginning after December 15, 2020 and allows for early adoption. We do not expect this new standard to have a significant impact to our disclosures.