Organization and Basis of Interim Presentation	9 Months Ended
Sep. 29, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Interim Presentation	Organization, Basis of Interim Presentation and Recent Developments Unless the context otherwise indicates or requires, as used in this Quarterly Report on Form 10-Q, references to “we,” “us,” “our,” and the “Company” refer to Spirit AeroSystems Holdings, Inc. and its consolidated subsidiaries. References to “Spirit” refer only to our subsidiary, Spirit AeroSystems, Inc., and references to “Holdings” refer only to Spirit AeroSystems Holdings, Inc. The Company provides manufacturing and design expertise in a wide range of fuselage, propulsion, and wing products and services for aircraft original equipment manufacturers (“OEM”) and operators through its subsidiaries including Spirit. The Company's headquarters are in Wichita, Kansas, with manufacturing and assembly facilities in Tulsa, Oklahoma; Prestwick, Scotland; Wichita, Kansas; Kinston, North Carolina; Subang, Malaysia; Saint-Nazaire, France; Biddeford, Maine; Belfast, Northern Ireland; Casablanca, Morocco; and Dallas, Texas. The accompanying unaudited interim condensed consolidated financial statements include the Company’s financial statements and the financial statements of its majority-owned or controlled subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and the instructions to Form 10-Q and Article 10 of Regulation S-X. The Company’s fiscal quarters are 13 weeks in length. Since the Company’s fiscal year ends on December 31, the number of days in the Company’s first and fourth quarters varies slightly from year to year. All intercompany balances and transactions have been eliminated in consolidation. As part of the monthly consolidation process, the Company’s international subsidiaries that have functional currencies other than the U.S. dollar are translated to U.S. dollars using the end-of-month translation rate for balance sheet accounts and average period currency translation rates for revenue and income accounts. The subsidiaries in Prestwick, Scotland and Subang, Malaysia use the British pound as their functional currency. All other foreign subsidiaries and branches use the U.S. dollar as their functional currency. In the opinion of management, the accompanying unaudited interim condensed consolidated financial statements contain all adjustments (consisting of normal recurring adjustments and elimination of intercompany balances and transactions) considered necessary to fairly present the results of operations for the interim period. The results of operations for the nine months ended September 29, 2022, are not necessarily indicative of the results that may be expected for the year ending December 31, 2022. In connection with the preparation of the condensed consolidated financial statements, the Company evaluated subsequent events through the date the financial statements were issued. The interim financial statements should be read in conjunction with the audited consolidated financial statements, including the notes thereto, included in the Company’s 2021 Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on February 15, 2022 (the “2021 Form 10-K”). The Company's significant accounting policies are described in Note 3, Summary of Significant Accounting Policies to our consolidated financial statements in the 2021 Form 10-K. B737 MAX Boeing's deliveries of the B737 MAX resumed in the fourth quarter of 2020 when the FAA rescinded the order that grounded B737 MAX aircraft in the United States. Since November 2020, regulators from Brazil, Canada, the EU, U.K., India, and other countries have taken similar actions to unground the B737 MAX and permit return to service. The Civil Aviation Administration of China, which is the most significant country remaining not to allow the B737 MAX to return to service, issued an airworthiness directive in December 2021, directing corrective actions necessary to allow for return to service, and held a special meeting in September 2022 to review the training specifications for the aircraft. During the nine-month period ended September 29, 2022, Boeing continued to announce orders for the B737 MAX, and air carriers generally continued resuming flights on the aircraft. Global Economic Events Global economic conditions may impact the Company's results of operations. Russia’s February 2022 invasion of Ukraine, the resultant sanctions and other measures imposed by the U.S. and other governments, and other related impacts have resulted in economic and political uncertainty and risks. In response to the Russian invasion of Ukraine, and the associated U.S. sanctions, the Company suspended all sanctioned activities relating to Russia, primarily consisting of sales and service activities. In the second quarter of 2022, the Company recorded an aggregate pre-tax loss of $28.1 related to adjustments of certain assets and liabilities associated with sanctioned Russian business activities. The charges are included on the Company's Condensed Consolidated Statements of Operations for the nine-month period ended September 29, 2022. Continuation or significant expansion of economic disruption or escalation of the conflict, or other geopolitical events of a similar nature, could have a material adverse effect on orders from the Company's customers, the public’s ability or willingness to continue to travel, and/or the Company's results of operations. Energy, freight, raw material and other costs have been impacted by, and may continue to be impacted by, the conflict. These costs have also been impacted by global inflationary pressures, including significant increases in inflation in many countries in which the Company operates. The Company's associated estimates of such costs, where applicable, use the most recent information available. The economic impact of inflation, together with the impact of increases in interest rates and actions taken to attempt to reduce inflation, may have a significant effect on the global economy, air travel, the Company's supply chain and the Company's customers, and, as a result, on the Company's business. The Company continues to monitor and evaluate related risks and uncertainties, including the items discussed in Item 1A. “Risk Factors” in the 2021 Form 10-K. COVID-19 During the nine months ended September 29, 2022, the COVID-19 pandemic continued to have a significant negative impact on the aviation industry, the Company's customers, and the Company's business globally. Continued impacts on the aviation industry and the Company’s operational and financial performance remains uncertain and outside of the Company’s control. The Company expects the pandemic and its effects to continue to have a significant negative impact on its business for the duration of the pandemic and during the subsequent economic recovery, which could be for an extended period of time.

Unless the context otherwise indicates or requires, as used in this Quarterly Report on Form 10-Q, references to “we,” “us,” “our,” and the “Company” refer to Spirit AeroSystems Holdings, Inc. and its consolidated subsidiaries. References to “Spirit” refer only to our subsidiary, Spirit AeroSystems, Inc., and references to “Holdings” refer only to Spirit AeroSystems Holdings, Inc.

The Company provides manufacturing and design expertise in a wide range of fuselage, propulsion, and wing products and services for aircraft original equipment manufacturers (“OEM”) and operators through its subsidiaries including Spirit. The Company's headquarters are in Wichita, Kansas, with manufacturing and assembly facilities in Tulsa, Oklahoma; Prestwick, Scotland; Wichita, Kansas; Kinston, North Carolina; Subang, Malaysia; Saint-Nazaire, France; Biddeford, Maine; Belfast, Northern Ireland; Casablanca, Morocco; and Dallas, Texas.

The accompanying unaudited interim condensed consolidated financial statements include the Company’s financial statements and the financial statements of its majority-owned or controlled subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and the instructions to Form 10-Q and Article 10 of Regulation S-X. The Company’s fiscal quarters are 13 weeks in length. Since the Company’s fiscal year ends on December 31, the number of days in the Company’s first and fourth quarters varies slightly from year to year. All intercompany balances and transactions have been eliminated in consolidation.

As part of the monthly consolidation process, the Company’s international subsidiaries that have functional currencies other than the U.S. dollar are translated to U.S. dollars using the end-of-month translation rate for balance sheet accounts and average period currency translation rates for revenue and income accounts. The subsidiaries in Prestwick, Scotland and Subang, Malaysia use the British pound as their functional currency. All other foreign subsidiaries and branches use the U.S. dollar as their functional currency.

In the opinion of management, the accompanying unaudited interim condensed consolidated financial statements contain all adjustments (consisting of normal recurring adjustments and elimination of intercompany balances and transactions) considered necessary to fairly present the results of operations for the interim period. The results of operations for the nine months ended September 29, 2022, are not necessarily indicative of the results that may be expected for the year ending December 31, 2022.

In connection with the preparation of the condensed consolidated financial statements, the Company evaluated subsequent events through the date the financial statements were issued. The interim financial statements should be read in conjunction with the audited consolidated financial statements, including the notes thereto, included in the Company’s 2021 Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on February 15, 2022 (the “2021 Form 10-K”).

Boeing's deliveries of the B737 MAX resumed in the fourth quarter of 2020 when the FAA rescinded the order that grounded B737 MAX aircraft in the United States. Since November 2020, regulators from Brazil, Canada, the EU, U.K., India, and other countries have taken similar actions to unground the B737 MAX and permit return to service. The Civil Aviation Administration of China, which is the most significant country remaining not to allow the B737 MAX to return to service, issued an airworthiness directive in December 2021, directing corrective actions necessary to allow for return to service, and held a special meeting in September 2022 to review the training specifications for the aircraft. During the nine-month period ended September 29, 2022, Boeing continued to announce orders for the B737 MAX, and air carriers generally continued resuming flights on the aircraft.

Global economic conditions may impact the Company's results of operations. Russia’s February 2022 invasion of Ukraine, the resultant sanctions and other measures imposed by the U.S. and other governments, and other related impacts have resulted in economic and political uncertainty and risks. In response to the Russian invasion of Ukraine, and the associated U.S. sanctions, the Company suspended all sanctioned activities relating to Russia, primarily consisting of sales and service activities. In the second quarter of 2022, the Company recorded an aggregate pre-tax loss of $28.1 related to adjustments of certain assets and liabilities associated with sanctioned Russian business activities. The charges are included on the Company's Condensed Consolidated Statements of Operations for the nine-month period ended September 29, 2022. Continuation or significant expansion of economic disruption or escalation of the conflict, or other geopolitical events of a similar nature, could have a material adverse effect on orders from the Company's customers, the public’s ability or willingness to continue to travel, and/or the Company's results of operations. Energy, freight, raw material and other costs have been impacted by, and may continue to be impacted by, the conflict. These costs have also been impacted by global inflationary pressures, including significant increases in inflation in many countries in which the Company operates. The Company's associated estimates of such costs, where applicable, use the most recent information available. The economic impact of inflation, together with the impact of increases in interest rates and actions taken to attempt to reduce inflation, may have a significant effect on the global economy, air travel, the Company's supply chain and the Company's customers, and, as a result, on the Company's business. The Company continues to monitor and evaluate related risks and uncertainties, including the items discussed in Item 1A. “Risk Factors” in the 2021 Form 10-K.