Spirit AeroSystems (SPR) 10-Q 5 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 30, 2017	Apr. 27, 2017
Class Of Stock [Line Items]
Entity Registrant Name	Spirit AeroSystems Holdings, Inc.
Entity Central Index Key	1,364,885
Document Type	10-Q
Document Period End Date	Mar. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Amendment Flag	false
Trading Symbol	SPR
Class A [Member]
Class Of Stock [Line Items]
Entity Common Stock, Shares Outstanding		120,617,520
Class B [Member]
Class Of Stock [Line Items]
Entity Common Stock, Shares Outstanding		0

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016
Revenues [Abstract]
Net revenues	$ 1,694.1	$ 1,681.6
Operating costs and expenses
Cost of sales	1,412.8	1,359
Selling, general and administrative	51.9	50
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds	10.8	0
Research and development	5	6.1
Total operating costs and expenses	1,480.5	1,415.1
Operating income	213.6	266.5
Interest expense and financing fee amortization	(9.5)	(11.4)
Other expense, net	(1.5)	2.2
Income before income taxes and equity in net income of affiliate	205.6	252.9
Income tax (provision) benefit	(64)	(81.9)
Income before equity in net income of affiliate	141.6	171
Equity in net income of affiliate	0.1	0.6
Net income	$ 141.7	$ 171.6
Earnings per share
Basic (in dollars per share)	$ 1.19	$ 1.30
Diluted (in dollars per share)	1.17	1.29
Common Stock, Dividends, Per Share, Declared	$ 0.10	$ 0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 141.7	$ 171.6
Changes in other comprehensive loss, net of tax:
Foreign currency translation adjustments	3.4	(7.6)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(0.4)	0.8
Unrealized foreign exchange loss on intercompany loan, net of tax effect of XX and $0.3 for three months ended, respectively	1	(1.2)
Total other comprehensive loss	4	(8)
Total comprehensive income	$ 145.7	$ 163.6

Consolidated Statements of Com4

Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	$ 0.2	$ (0.2)
Unrealized exchange (loss) on intercompany loan, tax	$ (0.2)	$ 0.3

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 672.2	$ 697.7
Restricted Cash and Cash Equivalents	5.5	0
Accounts receivable, net	818.6	660.5
Inventory, net	1,473	1,515.3
Other current assets	28.8	36.9
Total current assets	2,998.1	2,910.4
Property, plant and equipment, net	1,986.3	1,991.6
Pension assets	290.9	282.3
Other assets	193.9	220.9
Total assets	5,469.2	5,405.2
Current liabilities
Accounts payable	691.6	579.7
Accrued expenses	212.6	216.2
Profit sharing	20.9	101.4
Current portion of long-term debt	26.8	26.7
Advance payments, short-term	183	199.3
Deferred revenue and other deferred credits, short-term	320.5	312.1
Deferred grant income liability - current	19.9	14.4
Other current liabilities	126.3	94.4
Total current liabilities	1,601.6	1,544.2
Liabilities Noncurrent
Long-term debt	1,063.9	1,060
Advance payments, long-term	305.8	342
Pension/OPEB obligation	42.6	43.9
Deferred grant income liability - non-current	54	63.4
Deferred revenue and other deferred credits	131.6	146.8
Other liabilities	284.8	276.1
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, par value $0.01, 10,000,000 shares authorized, no shares issued	0	0
Additional Paid in Capital [Abstract]
Additional paid-in capital	1,082.8	1,078.9
AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract
Accumulated other comprehensive loss	(182.9)	(186.9)
Retained Earnings Accumulated Deficit [Abstract]
Retained earnings	2,243.7	2,113.9
Treasury Stock, Value	(1,160.4)	(1,078.8)
Total shareholders’ equity	1,984.4	1,928.3
Noncontrolling interest	0.5	0.5
Total equity	1,984.9	1,928.8
Total liabilities and equity	5,469.2	5,405.2
Class A [Member]
Stockholders' Equity Attributable to Parent [Abstract]
Common stock	1.2	1.2
Class B [Member]
Stockholders' Equity Attributable to Parent [Abstract]
Common stock	$ 0	$ 0

Consolidated Balance Sheets (U6

Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Mar. 30, 2017	Dec. 31, 2016
Shareholders' equity
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Treasury Stock, Shares	25,343,469	23,936,092
Class A [Member]
Shareholders' equity
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	120,637,294	121,642,556
Class B [Member]
Shareholders' equity
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	0	0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016
Operating activities
Net income	$ 141.7	$ 171.6
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation expense	52.5	49.4
Amortization of deferred financing fees	0.8	1.1
Accretion of customer supply agreement	2.9	1
Employee stock compensation expense	8	5.3
Excess tax benefit of share-based payment arrangements	0	(0.3)
Loss from foreign currency transactions	0.5	4.6
Gain (Loss) on Disposition of Property Plant Equipment	0	2.5
Deferred taxes	24.5	24.1
Increase (Decrease) in Pension and Postretirement Obligations	(8.7)	7
Grant liability amortization	(4.1)	(2.7)
Equity in net income of affiliate	(0.1)	(0.6)
Changes in assets and liabilities
Accounts receivable	(158.1)	(148.6)
Inventory, net	46.1	(50.6)
Accounts payable and accrued liabilities	113.2	19.9
Profit sharing/deferred compensation	(80.5)	(43.1)
Advance payments	(52.5)	(40.3)
Income taxes receivable/payable	39.4	58.2
Deferred revenue and other deferred credits	(6.3)	29.9
Other	(7.6)	5.4
Net cash provided by operating activities	111.7	93.8
Investing activities
Purchase of property, plant and equipment	(40.6)	(50.4)
Net cash used in investing activities	(40.6)	(50.4)
Financing activities
Principal payments of debt	(0.8)	(7.5)
Payments Related to Tax Withholding for Share-based Compensation	(4.1)	(2.9)
Excess tax benefit of share-based payment arrangements	0	0.2
Debt issuance and financing costs	(1)	0
Proceeds from Other Debt	7.6	0
Payments for Repurchase of Common Stock	(81.5)	(165.2)
Proceeds from (Repayments of) Restricted Cash, Financing Activities	(5.5)	0
Payments of Dividends	(12)	0
Net cash used in financing activities	(97.3)	(175.4)
Effect of exchange rate changes on cash and cash equivalents	0.7	(2.4)
Net (decrease) increase in cash and cash equivalents for the period	(25.5)	(134.4)
Cash and cash equivalents, beginning of period	697.7	957.3
Cash and cash equivalents, end of period	$ 672.2	$ 822.9

Organization and Basis of Inter

Organization and Basis of Interim Presentation	3 Months Ended
	Mar. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Interim Presentation	Organization and Basis of Interim Presentation Spirit AeroSystems Holdings, Inc. (“Holdings” or 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 subsidiary, Spirit AeroSystems, Inc. (“Spirit”). The Company has its headquarters in Wichita, Kansas, with manufacturing and assembly facilities in Tulsa and McAlester, Oklahoma; Prestwick, Scotland; Wichita, Kansas; Kinston, North Carolina; Subang, Malaysia; and Saint-Nazaire, France. 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. Because 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 entities 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 U.K. and Malaysian subsidiaries use the British pound as their functional currency; and the Singapore subsidiary uses the Singapore dollar as its 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 three months ended March 30, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017. Certain reclassifications have been made to the prior year financial statements and notes to conform to the 2017 presentation. 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 2016 Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on February 10, 2017 (the “2016 Form 10-K”).

Changes in Estimates

Changes in Estimates	3 Months Ended
	Mar. 30, 2017
Changes in Estimates [Abstract]
Change In Estimate [Text Block]	3. Changes in Estimates The Company has a Company-wide quarterly Estimate at Completion (“EAC”) process in which management assesses the progress and performance of the Company’s contracts. This process requires management to review each program’s progress towards completion by evaluating the program schedule, changes to identified risks and opportunities, changes to estimated contract revenues and estimated contract costs over the current contract block and any outstanding contract matters. Risks and opportunities include management’s judgment about the cost associated with a program’s ability to achieve the schedule, technical requirements (e.g., a newly-developed product versus a mature product) and any other contract requirements. Due to the span of years it may take to complete a contract block and the scope and nature of the work required to be performed on those contracts, the estimation of total revenue and costs at completion is complicated and subject to many variables and, accordingly, is subject to change. When adjustments in estimated total contract block revenue or estimated total cost are required, any changes from prior estimates for delivered units are recognized in the current period as a cumulative catch-up adjustment for the inception-to-date effect of such changes. Cumulative catch-up adjustments are driven by several factors including improved production efficiencies, assumed rate of production, the rate of overhead absorption, changes to scope of work, and contract modifications. When the total cost estimate exceeds the total revenue estimate on a contract block, a provision for the entire loss on the contract block is recorded in the period in which the loss is determined. Changes in estimates are summarized below: For the Three Months Ended Changes in Estimates March 30, 2017 March 31, 2016 (Unfavorable) Favorable Cumulative Catch-up Adjustment by Segment Fuselage $ (0.2 ) $ 16.2 Propulsion 1.5 5.9 Wing 8.0 10.1 Total Favorable Cumulative Catch-up Adjustment $ 9.3 $ 32.2 Changes in Estimates on Loss Programs and (Forward Loss) by Segment Fuselage $ (5.9 ) $ 3.1 Propulsion $ — $ 8.9 Wing $ 1.8 $ 3.0 Total (Forward Loss) and Change in Estimate on Loss Programs $ (4.1 ) $ 15.0 Total Change in Estimate $ 5.2 $ 47.2 EPS Impact (diluted per share based upon statutory rates) $ 0.03 $ 0.22

Accounts Receivable, net

Accounts Receivable, net	3 Months Ended
	Mar. 30, 2017
Accounts Receivable, Net, Current [Abstract]
Accounts Receivable, net	4. Accounts Receivable, net Accounts receivable, net consists of the following: March 30, December 31, Trade receivables $ 805.6 $ 647.3 Other 13.9 18.4 Less: allowance for doubtful accounts (0.9 ) (5.2 ) Accounts receivable, net $ 818.6 $ 660.5 Accounts receivable, net includes unbilled receivables on long-term aerospace contracts, comprised principally of revenue recognized on contracts for which amounts were earned but not contractually billable as of the balance sheet date, or amounts earned for which the recovery will occur over the term of the contract, which could exceed one year.

Inventory

Inventory	3 Months Ended
	Mar. 30, 2017
Inventory Disclosure [Abstract]
Inventory	Inventory Capitalized pre-production costs include certain contract costs, including applicable overhead, incurred before a product is manufactured on a recurring basis. Significant statement of work changes considered not reimbursable by the customer can also cause pre-production costs to be incurred. These costs are typically amortized over a certain number of shipset deliveries. Capitalized pre-production may be amortized over multiple blocks. See the contract block table noted below. Deferred production includes costs for the excess of production costs over the estimated average cost per shipset, and credit balances for favorable variances on contracts between actual costs incurred and the estimated average cost per shipset for units delivered under the current production blocks. Recovery of excess-over-average deferred production costs is dependent on the number of shipsets ultimately sold and the ultimate selling prices and lower production costs associated with future production under these contract blocks. The Company believes these amounts, net of forward loss provisions, will be fully recovered over the contract block quantities noted in the contract block and orders table below. Should orders not materialize in future periods to fulfill the block, potential forward loss charges may be necessary to the extent the final delivered quantity does not absorb deferred inventory costs. Sales significantly under estimates or costs significantly over estimates could result in losses on these contracts in future periods. Capitalized pre-production and deferred production inventories are at risk to the extent that the Company does not achieve the orders in the forecasted blocks or if future actual costs exceed current projected estimates, as those categories of inventory are recoverable over future deliveries. Forward loss provisions on contract blocks are recorded in the period in which they become evident and included in inventory with any remaining amount reflected in accrued contract liabilities. Inventories are summarized as follows: March 30, December 31, Raw materials $ 299.0 $ 281.9 Work-in-process 772.1 790.7 Finished goods 28.9 30.9 Product inventory 1,100.0 1,103.5 Capitalized pre-production (1) 97.2 103.5 Deferred production (2) 689.5 717.4 Forward loss provision (3) (413.7 ) (409.1 ) Total inventory, net $ 1,473.0 $ 1,515.3 For contract blocks that have not closed, the following non-product inventory amounts were included in the inventory table above: (1) For the period ended March 30, 2017, $80.1 and $12.7 on the A350 XWB and Rolls-Royce BR725 programs, respectively. For the period ended December 31, 2016, $83.7 and $15.2 on the A350 XWB and Rolls-Royce BR725 programs, respectively. (2) For the period ended March 30, 2017, $653.8 and $118.1 on the A350 XWB and Rolls-Royce BR725 programs, respectively. For the period ended December 31, 2016, $657.2 and $114.6 on the A350 XWB and Rolls-Royce BR725 programs, respectively. (3) For the period ended March 30, 2017, ($259.9) and ($141.2) on the A350 XWB and Rolls-Royce BR725 programs, respectively. For the period ended December 31, 2016, ($255.8) and ($140.8) on the A350 XWB and Rolls-Royce BR725 programs, respectively. Includes a $2.1 reclassification between Work-in-process and Forward loss provision as of December 31, 2016. Significant amortization of capitalized pre-production and deferred production inventory has occurred over the following contract block deliveries and will continue to occur over the following contract blocks: Model Current Block Deliveries Contract Block Quantity A350 XWB 157 800 Rolls-Royce BR725 273 350

Property, Plant and Equipment

Property, Plant and Equipment	3 Months Ended
	Mar. 30, 2017
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, net	Property, Plant and Equipment, net Property, plant and equipment, net consists of the following: March 30, December 31, Land $ 15.0 $ 14.9 Buildings (including improvements) 651.8 642.5 Machinery and equipment (1) 1,396.1 1,373.9 Tooling 986.3 982.4 Capitalized software (1) 261.9 261.9 Construction-in-progress 206.3 193.7 Total 3,517.4 3,469.3 Less: accumulated depreciation (1,531.1 ) (1,477.7 ) Property, plant and equipment, net $ 1,986.3 $ 1,991.6 (1) Includes a $6.9 reclassification between Machinery and equipment and Capitalized software for the period ended December 31, 2016. Repair and maintenance costs are expensed as incurred. The Company recognized repair and maintenance costs of $22.4 and $26.6 for the three months ended March 30, 2017 and March 31, 2016 , respectively. The Company capitalizes certain costs, such as software coding, installation and testing, that are incurred to purchase or to create and implement internal-use computer software. Depreciation expense related to capitalized software was $5.2 and $4.5 for the three months ended March 30, 2017 and March 31, 2016 , respectively. The Company reviews capital and amortizing intangible assets (long-lived assets) for impairment on an annual basis or whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. The Company evaluated its long-lived assets at its locations and determined no impairment was necessary for the period ended March 30, 2017 .

Other Assets

Other Assets	3 Months Ended
	Mar. 30, 2017
Other Assets, Noncurrent [Abstract]
Other Assets	7. Other Assets Other assets are summarized as follows: March 30, December 31, Intangible assets Patents $ 1.9 $ 1.9 Favorable leasehold interests 6.3 6.3 Total intangible assets 8.2 8.2 Less: Accumulated amortization - patents (1.8 ) (1.8 ) Accumulated amortization - favorable leasehold interest (4.3 ) (4.2 ) Intangible assets, net 2.1 2.2 Deferred financing Deferred financing costs 39.4 38.5 Less: Accumulated amortization - deferred financing costs (32.5 ) (32.2 ) Deferred financing costs, net 6.9 6.3 Other Goodwill - Europe 2.3 2.3 Equity in net assets of affiliates 4.4 4.4 Supply agreements (1) 13.6 17.0 Restricted cash - collateral requirements 19.9 19.9 Deferred Tax Asset - non-current 105.0 128.8 Other 39.7 40.0 Total $ 193.9 $ 220.9 (1) Under two agreements, certain payments accounted for as consideration paid by the Company to a customer and a supplier are being amortized as reductions to net revenues.

Advance Payments and Deferred R

Advance Payments and Deferred Revenue/Credits	3 Months Ended
	Mar. 30, 2017
Advance Payments And Deferred Revenue Credits [Abstract]
Advance Payments And Deferred Revenue Credits	Advance Payments and Deferred Revenue/Credits Advance payments. Advance payments are those payments made to Spirit by customers in contemplation of the future performance of services, receipt of goods, incurrence of expenditures, or for other assets to be provided by Spirit under a contract and are repayable if such obligation is not satisfied. The amount of advance payments to be recovered against production units expected to be delivered within a year is classified as a short-term liability on the Company’s consolidated balance sheet, with the balance of the unliquidated advance payments classified as a long-term liability. In April 2014, the Company signed a memorandum of agreement with Boeing that suspended our obligation to repay advance payments to Boeing related to the B787 program for a period of twelve months beginning April 1, 2014. The Company recommenced our repayment on April 1, 2015 and any repayments which otherwise would have become due during the twelve-month period beginning April 1, 2014 will be offset against the purchase price for B787 shipsets 1,001 through 1,120 . Deferred revenue/credits. Deferred revenue/credits generally consist of nonrefundable amounts received in advance of revenue being earned for specific contractual deliverables. However, certain amounts of deferred revenue/credits could be required to be refunded if certain performance obligations or conditions are not met. These payments are classified as deferred revenue/credits on the Company’s Condensed Consolidated Balance Sheet when received, and recognized as revenue as the production units are delivered or performance obligations or conditions are met. In November 2014, Spirit and Boeing entered into a Memorandum of Agreement (“November 2014 MOA”). As part of the November 2014 MOA, Boeing and Spirit established interim prices for certain B787 shipsets, and the parties agreed to negotiate future rate increases, recurring prices and other issues across multiple programs during 2015. Since the Company was unable to reach agreement with Boeing on these issues by the end of 2015, once the parties agree upon appropriate pricing for the B787-9, Boeing will be entitled to a retroactive adjustment on certain B787 payments which were based on the interim pricing. The amount Spirit received that is subject to a retroactive adjustment was recorded as deferred revenue, and has not been recognized by the Company as revenue. The Company is engaged in active discussions with Boeing concerning the subsequent B787-9 and initial B787-10 prices, and the parties have not yet reached agreement. Advance payments and deferred revenue/credits are summarized by program as follows: March 30, December 31, B787 $ 798.6 $ 834.8 Boeing - All other programs 21.4 18.6 A350 XWB 85.8 116.7 Airbus — All other programs 1.9 2.2 Other 33.2 27.9 Total advance payments and deferred revenue/credits $ 940.9 $ 1,000.2

Government Grants

Government Grants	3 Months Ended
	Mar. 30, 2017
Government Grants [Abstract]
Government Grants	Government Grants The Company received grants in the form of government funding for a portion of the site construction and other specific capital asset costs at the Company’s Kinston, North Carolina and Subang, Malaysia sites. Deferred grant income is being amortized as a reduction to production cost. This amortization is based on specific terms associated with the different grants. In North Carolina, the deferred grant income related to the capital investment criteria, which represents half of the grant, is being amortized over the lives of the assets purchased to satisfy the capital investment performance criteria. The other half of the deferred grant income is being amortized over a ten -year period, which began in 2010, in a manner consistent with the job performance criteria. Under the agreement, failure by Spirit to meet job performance criteria, including creation of a targeted number of jobs, could result in Spirit being obligated to make incremental rent payments to the North Carolina Global TransPark Authority over the initial term of the lease. The amount of the incremental rent payments would vary depending on Spirit’s level of attainment of the specified requirements not to exceed a certain dollar threshold. In Malaysia, the deferred grant income is being amortized based on the estimated lives of the eligible assets constructed with the grant funds as there are no performance criteria. The assets related to deferred grant income are consolidated within property, plant and equipment. Deferred grant income liability, net consists of the following: Balance, December 31, 2016 $ 77.8 Grant liability amortized (4.1 ) Exchange rate 0.2 Total deferred grant income liability, March 30, 2017 $ 73.9

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The FASB’s authoritative guidance on fair value measurements defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. It also establishes a fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance discloses three levels of inputs that may be used to measure fair value: Level 1 Quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 1 assets and liabilities include debt and equity securities and derivative contracts that are traded in an active exchange market. Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments and derivative contracts whose value is determined using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data. Observable inputs, such as current and forward interest rates and foreign exchange rates, are used in determining the fair value of the interest rate swaps and foreign currency hedge contracts. Level 3 Unobservable inputs that are supported by little or no market activity and are significant to the fair value of assets and liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. At March 30, 2017 and December 31, 2016, the Company did not hold any cash within money market funds. The Company’s long-term debt includes a senior unsecured term loan, senior unsecured notes and the Malaysian term loan. The estimated fair value of the Company’s debt obligations is based on the quoted market prices for such obligations or the historical default rate for debt with similar credit ratings. The following table presents the carrying amount and estimated fair value of long-term debt: March 30, 2017 December 31, 2016 Carrying Amount Fair Value Carrying Amount Fair Value Senior unsecured term loan A (including current portion) $ 485.3 $ 486.5 (2) $ 485.2 $ 484.8 (2) Senior unsecured notes due 2022 294.0 306.6 (1) 293.8 307.0 (1) Senior unsecured notes due 2026 297.0 296.5 (1) 296.9 292.4 (1) Malaysian loan 0.5 0.5 (2) 1.0 0.9 (2) Total $ 1,076.8 $ 1,090.1 $ 1,076.9 $ 1,085.1 (1) Level 1 Fair Value hierarchy (2) Level 2 Fair Value hierarchy

Derivative and Hedging Activiti

Derivative and Hedging Activities	3 Months Ended
	Mar. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative and Hedging Activities	Derivative and Hedging Activities The Company has historically entered into interest rate swap agreements to reduce its exposure to the variable rate portion of its long-term debt. The Company also considers counterparty credit risk and its own credit risk in its determination of all estimated fair values. The Company has historically entered into derivative instruments covered by master netting arrangements whereby, in the event of a default as defined by the A&R Credit Agreement (as defined below) or termination event, the non-defaulting party has the right to offset any amounts payable against any obligation of the defaulting party under the same counterparty agreement. See Note 12, Debt, for more information. Interest Rate Swaps On March 15, 2017, the Company entered into an interest rate swap agreement, with an effective date of March 31, 2017. The swaps have a notional value of $250.0 and fix the variable portion of the Company’s floating rate debt at 1.815% . As of March 30, 2017, there is no financial impact of this transaction.

Debt

Debt	3 Months Ended
	Mar. 30, 2017
Debt Disclosure [Abstract]
Debt	Debt Total debt shown on the balance sheet is comprised of the following: March 30, 2017 December 31, 2016 Current Noncurrent Current Noncurrent Senior unsecured term loan A $ 24.9 $ 460.4 $ 24.9 $ 460.3 Senior notes due 2022 — 294.0 — 293.8 Senior notes due 2026 — 297.0 — 296.9 Malaysian term loan 0.5 — 1.0 — Present value of capital lease obligations 1.4 12.5 0.8 9.0 Total $ 26.8 $ 1,063.9 $ 26.7 $ 1,060.0 Senior Unsecured Credit Facility On June 6, 2016, we entered into the senior unsecured Amended and Restated Credit Agreement, among Spirit, as borrower, the Company, as parent guarantor, the lenders party thereto, Bank of America, N.A., as administrative agent, and the other agents named therein (the “A&R Credit Agreement”). The A&R Credit Agreement provides for a $650.0 revolving credit facility (the “Revolver”) and a $500.0 term loan A facility (the “Term Loan”). Each of the Revolver and the Term Loan has a maturity date of June 4, 2021 , and each bears interest, at Spirit’s option, at either LIBOR plus 1.5% or a defined “base rate” plus 0.50% , subject to adjustment to amounts between and including LIBOR plus 1.125% and LIBOR plus 2.0% (or amounts between and including base rate plus 0.125% and base rate plus 1.0% , as applicable) based on changes to Spirit’s senior unsecured debt rating provided by Standard & Poor’s Financial Services LLC and/or Moody’s Investors Service, Inc. The principal obligations under the Term Loan are to be repaid in equal quarterly installments of $6.25 , with the remaining balance due at maturity of the Term Loan. The A&R Credit Agreement contains affirmative and negative covenants available to investment grade companies, including certain financial covenants that are tested on a quarterly basis. The A&R Credit Agreement contains an accordion feature that provides Spirit with the option to increase the Revolver commitments and/or institute one or more additional term loans by an amount not to exceed $500.0 in the aggregate, subject to the satisfaction of certain conditions and the participation of the lenders. Spirit used the proceeds of the Term Loan, along with cash on hand, to pay off the outstanding amounts of the term loan under our prior credit agreement and to pay a portion of the fees and expenses payable in connection with the A&R Credit Agreement. As of March 30, 2017, the outstanding balance of the Term Loan was $487.5 and the carrying value was $485.3 . Senior Notes 2022 Notes. In March 2014, the Company issued $300.0 in aggregate principal amount of 5.25% Senior Notes due March 15, 2022 (the “2022 Notes”) with interest payable, in cash in arrears, on March 15 and September 15 of each year, beginning September 15, 2014. The indenture governing the 2022 Notes requires that the 2022 Notes be guaranteed by the Company and each of Spirit’s existing and future domestic subsidiaries, if any, that may guarantee Spirit’s obligations under a senior credit facility. The carrying value of the 2022 Notes was $294.0 as of March 30, 2017. 2026 Notes. In June, 2016, the Company issued $300.0 in aggregate principal amount of 3.850% Senior Notes due June 15, 2026 (the “2026 Notes”) with interest payable, in cash in arrears, on June 15 and December 15 of each year, beginning December 15, 2016. The indenture governing the 2026 Notes requires that the 2026 Notes be guaranteed by the Company and each of Spirit’s existing and future domestic subsidiaries, if any, that may guarantee Spirit’s obligations under a senior credit facility. The carrying value of the 2026 Notes was $297.0 as of March 30, 2017. Proceeds from the 2026 Notes were used to fully repurchase a then-outstanding series of senior unsecured notes. The Indentures under the 2022 Notes and 2026 Notes contain covenants that limit Spirit’s, the Company’s and certain of Spirit’s subsidiaries’ ability to create liens or to enter into sale and leaseback transactions. These covenants are subject to a number of qualifications and limitations.

Pension and Other Post-Retireme

Pension and Other Post-Retirement Benefits	3 Months Ended
	Mar. 30, 2017
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Pension and Other Post-Retirement Benefits	Pension and Other Post-Retirement Benefits Defined Benefit Plans For the Three Months Ended Components of Net Periodic Pension Expense/(Income) March 30, March 31, Service cost $ 0.2 $ 0.3 Interest cost 9.6 11.7 Expected return on plan assets (18.3 ) (19.5 ) Amortization of net loss — 0.7 Special termination benefits (1) — 11.0 Net periodic pension (income) expense $ (8.5 ) $ 4.2 (1) Special termination benefits related to early retirement incentives offered as part of a voluntary retirement plan in the first quarter of 2016. Other Benefits For the Three Months Ended Components of Other Benefit Expense March 30, March 31, Service cost $ 0.3 $ 0.6 Interest cost 0.3 0.6 Amortization of prior service cost (0.2 ) — Amortization of net gain (0.6 ) (0.1 ) Special termination benefits (1) — 3.1 Net periodic other benefit (income) expense $ (0.2 ) $ 4.2 (1) Special termination benefits related to early retirement incentives offered as part of a voluntary retirement plan in the first quarter of 2016. Employer Contributions The Company expects to contribute zero dollars to the U.S. qualified pension plan and a combined total of approximately $8.9 for the Supplemental Executive Retirement Plan (“SERP”) and post-retirement medical plans in 2017. The Company’s projected contributions to the U.K. pension plan for 2017 are zero . The entire amount contributed can vary based on exchange rate fluctuations.

Stock Compensation

Stock Compensation	3 Months Ended
	Mar. 30, 2017
Share-based Compensation [Abstract]
Stock Compensation	Stock Compensation Holdings has established various stock compensation plans which include restricted share grants and stock purchase plans. Compensation values are based on the value of Holdings’ class A common stock on the grant date. The common stock value is added to equity and charged to period expense or included in inventory and cost of sales. The Executive Incentive Plan (the “EIP”), Short-Term Incentive Plan (“STIP”), Long-Term Incentive Plan (“LTIP”) and Director Stock Plan (DSP, and, together with the EIP, STIP and LTIP, the “Prior Plans”) were replaced by the Omnibus Incentive Plan (“Omnibus Plan”) in 2014. No new awards will be granted under such Prior Plans. Outstanding awards under the Prior Plans will continue to be governed by the terms of such plans until exercised, expired, or otherwise terminated or canceled. The Omnibus Plan provides for Long-Term Incentive Awards (“LTIAs”). For the 2014 plan year through the 2016 plan year, the LTIAs provided both time and performance based incentives as follows • 75% of the LTIAs consists of service-based restricted stock that vests in equal installments over a three-year period. • 25% of the LTIAs consists of market-based restricted stock that vests on the three-year anniversary of the grant date contingent upon total shareholder return (“TSR”) compared to the Company’s peers. In January 2017, the Company’s Board of Directors approved an amendment to the Omnibus Plan for the 2017 plan year and forward. The LTIAs for the 2017 plan year and forward provide both time and performance based incentives as follows: • 60% of the LTIAs consists of service-based restricted stock that vests in equal installments over a three-year period. • 20% of the LTIAs consists of market-based restricted stock that vests on the three-year anniversary of the grant date contingent upon TSR compared to the Company’s peers. • 20% of the LTIAs consists of performance-based restricted stock that vests on the three-year anniversary of the grant date contingent upon the Company’s cumulative three-year free cash flow as a percentage of the Company’s cumulative three-year revenues meeting certain thresholds. For the three months ended March 30, 2017 , the Company recognized a net total of $8.0 of stock compensation expense, which is net of stock forfeitures and includes expense for the Prior Plans and LTIAs under the Omnibus Plan. For the three months ended March 31, 2016 , the Company recognized $5.3 of stock compensation expense, net of forfeitures. The entire stock compensation expense of $8.0 and $5.3 , for the three months ended March 30, 2017 and March 31, 2016, respectively, was recorded as selling, general and administrative. During the three months ended March 30, 2017 , 322,159 shares, 92,003 shares, and 92,992 shares of class A common stock with aggregate grant date fair values of $18.2 , $5.1 and $5.1 were granted under the service-based, market-based, and performance based portions of the Company’s LTIAs, respectively. Additionally, 289,015 shares of class A common stock with an aggregate grant date fair value of $13.3 that were LTIAs vested during the three months ended March 30, 2017 .

Income Taxes

Income Taxes	3 Months Ended
	Mar. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The process for calculating the Company’s income tax expense involves estimating actual current taxes due plus assessing temporary differences arising from differing treatment for tax and accounting purposes that are recorded as deferred tax assets and liabilities. Deferred tax assets are periodically evaluated to determine their recoverability. The total net deferred tax asset at March 30, 2017 and December 31, 2016 was $104.8 and $128.7 , respectively. The difference is primarily due to the utilization of deductible temporary differences within the calculation of taxable income across jurisdictions. The Company files income tax returns in all jurisdictions in which it operates. The Company establishes reserves to provide for additional income taxes that may be due upon audit. These reserves are established based on management’s assessment as to the potential exposure attributable to permanent tax adjustments and associated interest. All tax reserves are analyzed quarterly and adjustments made as events occur that warrant modification. In general, the Company records income tax expense each quarter based on its estimate as to the full year’s effective tax rate. Certain items, however, are given discrete period treatment and the tax effects for such items are therefore reported in the quarter that an event arises. Events or items that may give rise to discrete recognition include excess tax benefits with respect to share-based compensation, finalizing amounts in income tax returns filed, finalizing audit examinations for open tax years and expiration of statutes of limitations and changes in tax law. The 31.1% effective tax rate for the three months ended March 30, 2017 differs from the 32.4% effective tax rate for the same period of 2016 primarily due to lower pre-tax income in 2017, less non-deductible expense within the Company’s income tax provision in 2017 and excess tax benefits with respect to share-based compensation in the income tax provision in 2017. The Company will continue to participate in the Internal Revenue Service’s Compliance Assurance Process (“CAP”) program for its 2016 and 2017 tax years. The CAP program’s objective is to resolve issues in a timely, contemporaneous manner and eliminate the need for a lengthy post-filing examination. There are no open audits in the Company’s foreign jurisdictions. The Company expects no material change in its recorded unrecognized tax benefit liability in the next 12 months.

Equity

Equity	3 Months Ended
	Mar. 30, 2017
Stockholders' Equity Note [Abstract]
Equity	Equity Earnings per Share Calculation Basic net income per share is computed using the weighted-average number of outstanding shares of common stock during the measurement period. Diluted net income per share is computed using the weighted-average number of outstanding shares of common stock and, when dilutive, potential outstanding shares of common stock during the measurement period. The Company accounts for treasury stock under the cost method and includes treasury stock as a component of stockholders’ equity. As of March 30, 2017 , no treasury shares have been reissued or retired. The following table sets forth the computation of basic and diluted earnings per share: For the Three Months Ended March 30, 2017 March 31, 2016 Income Shares Per Share Amount Income Shares Per Share Amount Basic EPS Income available to common stockholders $ 141.6 119.5 $ 1.19 $ 171.5 131.6 $ 1.30 Income allocated to participating securities 0.1 0.1 0.1 0.1 Net income $ 141.7 $ 171.6 Diluted potential common shares 1.1 1.0 Diluted EPS Net income $ 141.7 120.7 $ 1.17 $ 171.6 132.7 $ 1.29 Included in the outstanding common shares were 1.9 million and 2.2 million of issued but unvested shares at March 30, 2017 and March 31, 2016 , respectively, which are excluded from the basic EPS calculation. Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss is summarized by component as follows: As of As of March 30, 2017 December 31, 2016 Pension $ (98.5 ) $ (98.5 ) SERP/Retiree medical 20.1 20.5 Foreign currency impact on long term intercompany loan (18.1 ) (19.1 ) Currency translation adjustment (86.4 ) (89.8 ) Total accumulated other comprehensive loss $ (182.9 ) $ (186.9 )

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	3 Months Ended
	Mar. 30, 2017
Commitments Contingencies And Guarantees [Abstract]
Commitments, Contingencies and Guarantees	Commitments, Contingencies and Guarantees Litigation From time to time the Company is subject to, and is presently involved in, litigation or other legal proceedings arising in the ordinary course of business. While the final outcome of these matters cannot be predicted with certainty, considering, among other things, the meritorious legal defenses available, it is the opinion of the Company that none of these items, when finally resolved, will have a material adverse effect on the Company’s long-term financial position or liquidity. The Company had outstanding obligations with respect to litigation or other legal proceedings of $25.0 as of both March 30, 2017 and December 31, 2016. However, an unexpected adverse resolution of one or more of these items could have a material adverse effect on the results of operations and cash flows in a particular quarter or fiscal year. From time to time, in the ordinary course of business and similar to others in the industry, the Company receives requests for information from government agencies in connection with their regulatory or investigational authority. Such requests can include subpoenas or demand letters for documents to assist the government in audits or investigations. The Company reviews such requests and notices and take appropriate action. Additionally, the Company is subject to federal and state requirements for protection of the environment, including those for disposal of hazardous waste and remediation of contaminated sites. As a result, the Company is required to participate in certain government investigations regarding environmental remediation actions. On December 5, 2014, Boeing filed a complaint in Delaware Superior Court, Complex Commercial Litigation Division, entitled The Boeing Co. v. Spirit AeroSystems, Inc., No. N14C-12-055 (EMD). Boeing seeks indemnification from Spirit for (a) damages assessed against Boeing in International Union, United Automobile, Aerospace and Agricultural Workers of America v. Boeing Co., AAA Case No. 54 300 00795 07 (“UAW Arbitration”), which was brought on behalf of certain former Boeing employees in Tulsa and McAlester, Oklahoma, and (b) claims that Boeing settled in Society of Professional Engineering Employees in Aerospace v. Boeing Co., Nos. 05-1251-MLB, 07-1043-MLB (D. Kan.) (“Harkness Class Action”). The Company, Spirit and certain Spirit retirement plan entities were parties to the Harkness Class Action, but all claims against the Spirit entities were subsequently dismissed. Boeing’s Complaint asserts that the damages assessed against Boeing in the UAW Arbitration and the claims settled by Boeing in the Harkness Class Action are liabilities that Spirit assumed under an Asset Purchase Agreement between Boeing and Spirit, dated February 22, 2005 (the “APA”). Boeing asserts claims for breach of contract and declaratory judgment regarding its indemnification rights under the APA. Boeing estimates the UAW Arbitration decision to have a net present value of $39.0 . In regard to the Harkness Class Action, the district court approved a settlement in an amount of $90.0 . In addition to the amounts related to the UAW Arbitration and Harkness Class Action, Boeing seeks indemnification for more than $10.0 in attorneys’ fees it alleges it expended to defend the UAW Arbitration and Harkness Class Action, as well as for the reasonable fees, costs and expenses Boeing expends litigating the case against Spirit. Following a motion to dismiss (which was denied by Court Order dated August 14, 2015), Spirit answered Boeing’s Complaint and asserted a Counterclaim against Boeing, on the ground that the liabilities at issue were Boeing’s responsibility under the APA. Spirit’s Counterclaim alleges breach of contract and seeks a declaratory judgment regarding Spirit’s right to indemnification from Boeing under the APA. Spirit’s Counterclaim seeks to recover the amounts that Spirit spent litigating the Harkness Class Action, responding to Boeing’s indemnification demands concerning the Harkness Class Action and UAW Arbitration, and also litigating the current lawsuit against Boeing. On December 20, 2016, Boeing and Spirit moved for summary judgment. Summary judgment briefing was completed on February 9, 2017. On March 22, 2017, the court heard oral arguments on the parties' motions for summary judgment. A decision on the summary judgment motions is not expected until the second quarter of 2017. Spirit intends to defend vigorously against the allegations in this lawsuit. Guarantees Outstanding guarantees were $19.2 and $20.7 at March 30, 2017 and December 31, 2016 , respectively. Restricted Cash - Collateral Requirements The Company was required to maintain $19.9 of restricted cash as of both March 30, 2017 and December 31, 2016 related to certain collateral requirements for obligations under its workers’ compensation programs. The restricted cash is included in “Other assets” in the Company’s Condensed Consolidated Balance Sheets. Indemnification The Company has entered into customary indemnification agreements with each of its Directors, and some of its executive employment agreements include indemnification provisions. Under those agreements, the Company agrees to indemnify each of these individuals against claims arising out of events or occurrences related to that individual’s service as the Company’s agent or the agent of any of its subsidiaries to the fullest extent legally permitted. The Company has agreed to indemnify parties for specified liabilities incurred, or that may be incurred, in connection with transactions they have entered into with the Company. The Company is unable to assess the potential number of future claims that may be asserted under these indemnities, nor the amounts thereof (if any). As a result, the Company cannot estimate the maximum potential amount of future payments under these indemnities and therefore, no liability has been recorded. Service and Product Warranties and Extraordinary Rework Provisions for estimated expenses related to service and product warranties and certain extraordinary rework are evaluated on a quarterly basis. These costs are accrued and are recorded to unallocated cost of goods sold. These estimates are established using historical information on the nature, frequency and average cost of warranty claims, including the experience of industry peers. In the case of new development products or new customers, Spirit considers other factors including the experience of other entities in the same business and management judgment, among others. Service warranty and extraordinary work is reported in current liabilities and other liabilities in the Condensed Consolidated Balance Sheet. The warranty balance presented in the table below includes unresolved warranty claims that are in dispute in regards to their value as well as their contractual liability. The Company estimated the total costs related to some of these claims, however there is significant uncertainty surrounding the disposition of these disputed claims and as such, the ultimate determination of the provision’s adequacy requires significant management judgment. The amount of the specific provisions recorded against disputed warranty claims was $100.0 and $99.0 as of March 30, 2017 and December 31, 2016 , respectively. These specific provisions represent the Company’s best estimate of reasonably possible warranty costs. Should the Company incur higher than expected warranty costs and/or discover new or additional information related to these warranty provisions, the Company may incur charges that exceed these recorded amounts. The Company utilized available information to make appropriate assessments, however the Company recognizes that data on actual claims experience is of limited duration and therefore, claims projections are subject to judgment. The amount of the disputed warranty claims in excess of the specific warranty provision was $209.0 , as of both March 30, 2017 and December 31, 2016 . The following is a roll forward of the service warranty and extraordinary rework balance at March 30, 2017 : Balance, December 31, 2016 $ 163.7 Charges to costs and expenses 2.2 Payouts (1.1 ) Exchange rate 0.1 Balance, March 30, 2017 $ 164.9

Other Income (Expense), Net

Other Income (Expense), Net	3 Months Ended
	Mar. 30, 2017
Other Nonoperating Income (Expense) [Abstract]
Other Income (Expense), Net	Other Income (Expense), Net Other income (expense), net is summarized as follows: For the Three Months Ended March 30, March 31, Kansas Development Finance Authority bond $ 1.0 $ 1.1 Rental and miscellaneous income 0.1 0.1 Interest income 1.0 0.8 Foreign currency losses (0.6 ) (4.2 ) Total $ 1.5 $ (2.2 ) Foreign currency losses are due to the impact of movement in foreign currency exchange rates on an intercompany revolver and long-term contractual rights/obligations, as well as trade and intercompany receivables/payables which are denominated in a currency other than the entity’s functional currency.

Segment Information

Segment Information	3 Months Ended
	Mar. 30, 2017
Segment Reporting [Abstract]
Segment Information	Segment Information The Company operates in three principal segments: Fuselage Systems, Propulsion Systems and Wing Systems. All other Company activities fall within the All Other segment, principally made up of sundry sales of miscellaneous services, tooling contracts, and sales of natural gas through Kansas Industrial Energy Supply Company (KIESC), a tenancy-in-common with other companies that have operations in Wichita, Kansas. The Company’s Fuselage Systems segment includes development, production and marketing of forward, mid and rear fuselage sections and systems, primarily to aircraft OEMs, as well as related spares and maintenance, repairs and overhaul (“MRO”) services. The Fuselage Systems segment manufactures products at the Company’s facilities in Wichita, Kansas and Kinston, North Carolina. The Fuselage Systems segment also includes an assembly plant for the A350 XWB aircraft in Saint-Nazaire, France. The Company’s Propulsion Systems segment includes development, production and marketing of struts/pylons, nacelles (including thrust reversers), and related engine structural components primarily to aircraft or engine OEMs, as well as related spares and MRO services. The Propulsion Systems segment manufactures products at the Company’s facility in Wichita, Kansas. The Company’s Wing Systems segment includes development, production and marketing of wings and wing components (including flight control surfaces) as well as other miscellaneous structural parts primarily to aircraft OEMs, as well as related spares and MRO services. These activities take place at the Company’s facilities in Tulsa and McAlester, Oklahoma; Kinston, North Carolina; Prestwick, Scotland; and Subang, Malaysia. The Company’s segments are consistent with the organization and responsibilities of management reporting to the chief operating decision-maker for the purpose of assessing performance. The Company’s definition of segment operating income differs from net profit margin as presented in its primary financial statements and a reconciliation of the segment and consolidated results is provided in the table set forth below. The Company’s primary profitability measure to review a segment’s operating performance is segment operating income before corporate selling, general and administrative expenses, research and development and unallocated cost of sales. Corporate selling, general and administrative expenses include centralized functions such as accounting, treasury and human resources that are not specifically related to the Company’s operating segments and are not allocated in measuring the operating segments’ profitability and performance and net profit margins. Research and development includes research and development efforts that benefit the Company as a whole and are not unique to a specific segment. Unallocated cost of sales includes general costs not directly attributable to segment operations, such as warranty, early retirement and other incentives. All of these items are not specifically related to the Company’s operating segments and are not utilized in measuring the operating segments’ profitability and performance. While some working capital accounts are maintained on a segment basis, much of the Company’s assets are not managed or maintained on a segment basis. Property, plant and equipment, including tooling, are used in the design and production of products for each of the segments and, therefore, are not allocated to any individual segment. In addition, cash, prepaid expenses, other assets and deferred taxes are managed and maintained on a consolidated basis and generally do not pertain to any particular segment. Raw materials and certain component parts are used in the production of aerostructures across all segments. Work-in-process inventory is identifiable by segment, but is managed and evaluated at the program level. As there is no segmentation of the Company’s productive assets, depreciation expense (included in fixed manufacturing costs and selling, general and administrative expenses) and capital expenditures, no allocation of these amounts has been made solely for purposes of segment disclosure requirements. The following table shows segment revenues and operating income for the three months ended March 30, 2017 and March 31, 2016 : Three Months Ended March 30, March 31, Segment Revenues Fuselage Systems (1) $ 916.9 $ 875.8 Propulsion Systems 406.3 438.6 Wing Systems 369.0 360.5 All Other (1) 1.9 6.7 $ 1,694.1 $ 1,681.6 Segment Operating Income (Loss) Fuselage Systems (1) $ 150.4 $ 177.7 Propulsion Systems 73.7 99.1 Wing Systems 58.5 58.8 All Other (1) (0.1 ) 1.5 282.5 337.1 Corporate SG&A (51.9 ) (50.0 ) Impact of severe weather event (10.8 ) — Research and development (5.0 ) (6.1 ) Unallocated cost of sales (2) (1.2 ) (14.5 ) Total operating income $ 213.6 $ 266.5 (1) Includes a reclassification of $2.0 of revenues and $0.4 of operating income from the Other segment to the Fuselage segment for the three months ended March 31, 2016 . (2) Includes $1.2 and $2.3 of warranty reserve for the three months ended March 30, 2017 and March 31, 2016 , respectively. Also includes $11.8 related to early retirement incentives for the three months ended March 31, 2016 .

Condensed Consolidating Financi

Condensed Consolidating Financial Information	3 Months Ended
	Mar. 30, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Financial Information	Condensed Consolidating Financial Information The 2022 Notes and 2026 Notes are fully and unconditionally guaranteed on a senior unsecured basis by the Company and no subsidiaries are guarantors to any of Spirit’s senior notes. The following condensed consolidating financial information, which has been prepared in accordance with the requirements for presentation of Rule 3-10(d) of Regulation S-X promulgated under the Securities Act, presents the condensed consolidating financial information separately for: (i) Holdings, as the parent company and parent guarantor to the A&R Credit Agreement, as further detailed in Note 12, Debt; (ii) Spirit, as the subsidiary issuer of the 2022 Notes and the 2026 Notes; (iii) The Company’s subsidiaries, (“Non-Guarantor Subsidiaries”), on a combined basis; (iv) Consolidating entries and eliminations representing adjustments to (a) eliminate intercompany transactions between or among Holdings and the Non-Guarantor Subsidiaries, (b) eliminate the investments in the Company’s subsidiaries, and (c) record consolidating entries; and (v) Holdings and its subsidiaries on a consolidated basis. Condensed Consolidating Statements of Operations For the Three Months Ended March 30, 2017 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Net revenues $ — $ 1,520.1 $ 333.1 $ (159.1 ) $ 1,694.1 Operating costs and expenses Cost of sales — 1,272.9 299.0 (159.1 ) 1,412.8 Selling, general and administrative 1.6 46.8 3.5 — 51.9 Impact of severe weather event — 10.8 — — 10.8 Research and development — 4.1 0.9 — 5.0 Total operating costs and expenses 1.6 1,334.6 303.4 (159.1 ) 1,480.5 Operating (loss) income (1.6 ) 185.5 29.7 — 213.6 Interest expense and financing fee amortization — (9.5 ) (1.6 ) 1.6 (9.5 ) Other income (expense), net — 3.6 (0.5 ) (1.6 ) 1.5 (Loss) income before income taxes and equity in net income of affiliate and subsidiaries (1.6 ) 179.6 27.6 — 205.6 Income tax benefit (provision) 0.5 (60.4 ) (4.1 ) — (64.0 ) (Loss) income before equity in net income of affiliate and subsidiaries (1.1 ) 119.2 23.5 — 141.6 Equity in net income of affiliate 0.1 — 0.1 (0.1 ) 0.1 Equity in net income of subsidiaries 142.7 23.5 — (166.2 ) — Net income 141.7 142.7 23.6 (166.3 ) 141.7 Other comprehensive (loss) income 4.0 4.0 4.2 (8.2 ) 4.0 Comprehensive income (loss) $ 145.7 $ 146.7 $ 27.8 $ (174.5 ) $ 145.7 Condensed Consolidating Statements of Operations For the Three Months Ended March 31, 2016 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Net revenues $ — $ 1,510.5 $ 310.9 $ (139.8 ) $ 1,681.6 Operating costs and expenses Cost of sales — 1,214.4 284.4 (139.8 ) 1,359.0 Selling, general and administrative 1.5 44.2 4.3 — 50.0 Research and development — 5.0 1.1 — 6.1 Total operating costs and expenses 1.5 1,263.6 289.8 (139.8 ) 1,415.1 Operating (loss) income (1.5 ) 246.9 21.1 — 266.5 Interest expense and financing fee amortization — (11.3 ) (2.1 ) 2.0 (11.4 ) Other income (expense), net — 3.9 (4.1 ) (2.0 ) (2.2 ) (Loss) income before income taxes and equity in net income of affiliate and subsidiaries (1.5 ) 239.5 14.9 — 252.9 Income tax (provision) benefit 0.5 (78.7 ) (3.7 ) — (81.9 ) (Loss) income before equity in net income of affiliate and subsidiaries (1.0 ) 160.8 11.2 — 171.0 Equity in net income of affiliate 0.6 — 0.6 (0.6 ) 0.6 Equity in net income of subsidiaries 172.0 11.2 — (183.2 ) — Net income 171.6 172.0 11.8 (183.8 ) 171.6 Other comprehensive (loss) income (8.0 ) (8.0 ) (8.8 ) 16.8 (8.0 ) Comprehensive income (loss) $ 163.6 $ 164.0 $ 3.0 $ (167.0 ) $ 163.6 Condensed Consolidating Balance Sheet March 30, 2017 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Current assets Cash and cash equivalents $ — $ 654.6 $ 17.6 $ — $ 672.2 Restricted cash — 5.5 — — 5.5 Accounts receivable, net — 854.0 307.5 (342.9 ) 818.6 Inventory, net — 1,026.8 446.2 — 1,473.0 Other current assets — 22.4 6.4 — 28.8 Total current assets — 2,563.3 777.7 (342.9 ) 2,998.1 Property, plant and equipment, net — 1,463.7 522.6 — 1,986.3 Pension assets, net — 276.6 14.3 — 290.9 Investment in subsidiary 1,984.9 592.7 — (2,577.6 ) — Other assets — 404.0 120.9 (331.0 ) 193.9 Total assets $ 1,984.9 $ 5,300.3 $ 1,435.5 $ (3,251.5 ) $ 5,469.2 Current liabilities Accounts payable $ — $ 615.4 $ 419.1 $ (342.9 ) $ 691.6 Accrued expenses — 194.3 18.3 — 212.6 Profit sharing — 20.1 0.8 — 20.9 Current portion of long-term debt — 25.6 1.2 — 26.8 Advance payments, short-term — 183.0 — — 183.0 Deferred revenue and other deferred credits, short-term — 319.2 1.3 — 320.5 Deferred grant income liability - current — — 19.9 — 19.9 Other current liabilities — 125.3 1.0 — 126.3 Total current liabilities — 1,482.9 461.6 (342.9 ) 1,601.6 Long-term debt — 1,056.4 237.9 (230.4 ) 1,063.9 Advance payments, long-term — 305.8 — — 305.8 Pension/OPEB obligation — 42.6 — — 42.6 Deferred grant income liability - non-current — — 54.0 — 54.0 Deferred revenue and other deferred credits — 128.5 3.1 — 131.6 Other liabilities — 379.2 6.2 (100.6 ) 284.8 Total equity 1,984.9 1,904.9 672.7 (2,577.6 ) 1,984.9 Total liabilities and stockholders’ equity $ 1,984.9 $ 5,300.3 $ 1,435.5 $ (3,251.5 ) $ 5,469.2 Condensed Consolidating Balance Sheet December 31, 2016 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Current assets Cash and cash equivalents $ — $ 680.1 $ 17.6 $ — $ 697.7 Accounts receivable, net — 785.0 249.4 (373.9 ) 660.5 Inventory, net — 1,058.8 456.5 — 1,515.3 Other current assets — 29.0 7.9 — 36.9 Total current assets — 2,552.9 731.4 (373.9 ) 2,910.4 Property, plant and equipment, net — 1,462.3 529.3 — 1,991.6 Pension assets, net — 268.1 14.2 — 282.3 Investment in subsidiary 1,928.8 544.4 — (2,473.2 ) — Other assets — 398.9 101.4 (279.4 ) 220.9 Total assets $ 1,928.8 $ 5,226.6 $ 1,376.3 $ (3,126.5 ) $ 5,405.2 Current liabilities Accounts payable $ — $ 527.0 $ 426.6 $ (373.9 ) $ 579.7 Accrued expenses — 192.8 23.4 — 216.2 Profit sharing — 97.2 4.2 — 101.4 Current portion of long-term debt — 25.1 1.6 — 26.7 Advance payments, short-term — 199.3 — — 199.3 Deferred revenue and other deferred credits, short-term — 310.8 1.3 — 312.1 Deferred grant income liability - current — — 14.4 — 14.4 Other current liabilities — 94.2 0.2 — 94.4 Total current liabilities — 1,446.4 471.7 (373.9 ) 1,544.2 Long-term debt — 1,052.5 206.9 (199.4 ) 1,060.0 Advance payments, long-term — 342.0 — — 342.0 Pension/OPEB obligation — 43.9 — — 43.9 Deferred grant income liability - non-current — — 63.4 — 63.4 Deferred revenue and other deferred credits — 143.4 3.4 — 146.8 Other liabilities — 349.5 6.6 (80.0 ) 276.1 Total equity 1,928.8 1,848.9 624.3 (2,473.2 ) 1,928.8 Total liabilities and stockholders’ equity $ 1,928.8 $ 5,226.6 $ 1,376.3 $ (3,126.5 ) $ 5,405.2 Condensed Consolidating Statements of Cash Flows For the Three Months Ended March 30, 2017 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Operating activities Net cash provided by operating activities $ — $ 107.6 $ 4.1 $ — $ 111.7 Investing activities Purchase of property, plant and equipment — (35.0 ) (5.6 ) — (40.6 ) Net cash used in investing activities — (35.0 ) (5.6 ) — (40.6 ) Financing activities Principal payments of debt — (0.1 ) (0.7 ) — (0.8 ) Proceeds (payments) from intercompany debt — (1.5 ) 1.5 — — Taxes paid related to net share settlement of awards — (4.1 ) — — (4.1 ) Debt issuance and financing costs — (1.0 ) — — (1.0 ) Proceeds from financing under the New Markets Tax Credit Program — 7.6 — — 7.6 Proceeds (payments) from subsidiary for purchase of treasury stock 81.5 (81.5 ) — — — Purchase of treasury stock (81.5 ) — — — (81.5 ) Change in restricted cash — (5.5 ) — — (5.5 ) Proceeds (payments) from subsidiary for dividends paid 12.0 (12.0 ) — — — Dividends Paid (12.0 ) — — — (12.0 ) Net cash used in financing activities — (98.1 ) 0.8 — (97.3 ) Effect of exchange rate changes on cash and cash equivalents — — 0.7 — 0.7 Net decrease in cash and cash equivalents for the period — (25.5 ) — — (25.5 ) Cash and cash equivalents, beginning of period — 680.1 17.6 — 697.7 Cash and cash equivalents, end of period $ — $ 654.6 $ 17.6 $ — $ 672.2 Condensed Consolidating Statements of Cash Flows For the Three Months Ended March 31, 2016 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Operating activities Net cash provided by (used in) operating activities $ — $ 101.5 $ (7.7 ) $ — $ 93.8 Investing activities Purchase of property, plant and equipment — (37.3 ) (13.1 ) — (50.4 ) Net cash used in investing activities — (37.3 ) (13.1 ) — (50.4 ) Financing activities Principal payments of debt — (6.7 ) (0.8 ) — (7.5 ) Excess tax benefits from share-based payment arrangements — 0.2 — — 0.2 Proceeds (payments) from intercompany debt — 12.5 (12.5 ) — — Taxes paid related to net share settlement of awards — (2.9 ) — — (2.9 ) Proceeds (payments) from subsidiary for purchase of treasury stock 165.2 (165.2 ) — — — Purchase of treasury stock (165.2 ) — — — (165.2 ) Net cash used in financing activities — (162.1 ) (13.3 ) — (175.4 ) Effect of exchange rate changes on cash and cash equivalents — — (2.4 ) — (2.4 ) Net increase in cash and cash equivalents for the period — (97.9 ) (36.5 ) — (134.4 ) Cash and cash equivalents, beginning of period — 894.2 63.1 — 957.3 Cash and cash equivalents, end of period $ — $ 796.3 $ 26.6 $ — $ 822.9

Customer Unpriced Change Orders

Customer Unpriced Change Orders and Assertions (Notes)	3 Months Ended
	Mar. 30, 2017
Customer Unpriced Change Orders and Assertions [Abstract]
Long-term Contracts or Programs Disclosure [Text Block]	21. Customer Unpriced Change Orders and Assertions Spirit regularly commences work and incorporates customer-directed changes prior to negotiating pricing terms for engineering work, product modification work, and/or other statements of work. Spirit typically has the legal right to negotiate pricing for customer-directed changes. In those cases, Spirit asserts its contractual rights to be paid the additional revenue or cost reimbursement it expects to receive upon finalizing pricing terms. Spirit’s supply agreement for the B787 program (the “B787 Supply Agreement”) provides that initial prices for the B787-9 and B787-10 are to be determined by a procedure set out in the B787 Supply Agreement, and documented by amendment once that amendment has been agreed to by the parties. As part of the November 2014 MOA, Boeing and Spirit established interim prices for certain B787 shipsets, and the parties agreed to negotiate future rate increases, recurring prices, and other issues across multiple programs during 2015. Since Spirit was unable to reach agreement with Boeing on these issues by the end of 2015, once the parties agree upon appropriate pricing for the B787-9, Boeing will be entitled to a retroactive adjustment on certain B787 payments which were based on the interim pricing. The amount Spirit received that is subject to a retroactive adjustment was recorded as deferred revenue, and has not been recognized by the Company as revenue. Spirit is engaged in discussions with Boeing concerning the subsequent B787-9 and initial B787-10 prices, and the parties have not yet reached agreement. Spirit’s ability to successfully negotiate fair and equitable prices for these models as well as overall B787 delivery volumes and rate investments, and its ability to achieve forecasted cost improvements on all B787 models, are key factors in achieving the projected financial performance for this program. For B787-9 and B787-10 deliveries in the Company’s second B787 contract block, the Company has applied the applicable accounting guidance for unpriced change orders in estimating total block revenues which will be updated as part of the Company’s EAC process until the final pricing is negotiated. Pending final price negotiations, the Company has estimated revenue for B787-9 and B787-10 deliveries to include assumptions around changes from the contract configuration baseline for each B787 model.

New Accounting Pronouncements (

New Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 30, 2017
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	2. New Accounting Pronouncements In March 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2017-07, Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (“ASU 2017-07”). ASU 2017-07 requires entities to report the service cost component of net periodic pension and net periodic postretirement benefit cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. Further, ASU 2017-07 requires the other components of net periodic pension and net periodic postretirement benefit cost to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. Additionally, only the service cost component is eligible for capitalization, when applicable. The amendments of this ASU are effective for reporting periods beginning after December 15, 2017, with early adoption permitted. The adoption of ASU 2017-07 is not expected to have a material impact on the Company’s consolidated financial statements. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”). ASU 2016-15 provides guidance on eight specific cash flow classification issues that GAAP does not address. ASU 2016-15 is effective for reporting periods beginning after December 15, 2017, with early adoption permitted. The adoption of ASU 2016-15 is not expected to have a material impact on the Company’s consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”). This update requires recognition of lease assets and lease liabilities on the balance sheet of lessees. ASU 2016-02 is effective for fiscal years and interim reporting periods within those years beginning after December 15, 2018. Early adoption is permitted. ASU 2016-02 requires a modified retrospective transition approach and provides certain optional transition relief. The Company is currently evaluating the new guidance to determine the impact it may have to the Company’s consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (“ASU 2014-09,” which includes “ASC 606” and “ASC 340-40”). ASU 2014-09 requires recognition of revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The FASB has issued several updates to ASU 2014-09 that must be adopted concurrently with ASU 2014-09. Under ASC 606, revenue is recognized when control of promised goods or services transfers to a customer and is recognized in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. The major provisions include determining enforceable rights and obligations between parties, defining performance obligations as the units of accounting under a contract, accounting for variable consideration, and determining whether performance obligations are satisfied over time or at a point of time. Additionally, ASC 606 requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. ASC 606 will be effective for us beginning January 1, 2018. The guidance permits two methods of adoption: retrospectively to each prior reporting period presented (“full retrospective method”), or retrospectively with the cumulative effect of initially applying ASC 606 recognized at the date of initial application (“modified retrospective method”). The Company is adopting ASC 606 effective January 1, 2018 and the Company expects to do so using the modified retrospective method. Under ASC 606, the units-of-delivery method is no longer viable and production costs will generally not be deferred. The Company has determined that some of our contracts will have performance obligations that are satisfied over time and this will change the revenue recognition pattern with revenue being recognized earlier in the year of adoption as compared to the previous year as control transfers during production. Subsequently, year over year comparisons under ASU 2014-09 will be consistent with production levels. Additionally, ASU 2014-09 will result in changes to our existing disclosures as well as new disclosures, which will impact the information reported in our financial statements. The Company believes that the additional information will be useful to the users of our financial statements as the Company must disclose the nature, amount, timing, and uncertainty of revenue and cash flows arising from our contracts. In 2016, the Company established a cross-functional team to assess and prepare for implementation of the new standard. While the Company continues to assess some elements of ASU 2014-09, the Company has reviewed substantially all of our contracts with customers and has determined the business process and technology requirements. This includes documenting process changes, determining data requirements, and identifying changes in system mapping and configuration. The Company is currently designing our processes, including internal controls, and related systems solutions with concurrent implementation of some of these changes.

Changes in Estimates Changes in

Changes in Estimates Changes in Estimates (Tables)	3 Months Ended
	Mar. 30, 2017
Accounting Changes and Error Corrections [Abstract]
Schedule of Change in Accounting Estimate [Table Text Block]	The Company has a Company-wide quarterly Estimate at Completion (“EAC”) process in which management assesses the progress and performance of the Company’s contracts. This process requires management to review each program’s progress towards completion by evaluating the program schedule, changes to identified risks and opportunities, changes to estimated contract revenues and estimated contract costs over the current contract block and any outstanding contract matters. Risks and opportunities include management’s judgment about the cost associated with a program’s ability to achieve the schedule, technical requirements (e.g., a newly-developed product versus a mature product) and any other contract requirements. Due to the span of years it may take to complete a contract block and the scope and nature of the work required to be performed on those contracts, the estimation of total revenue and costs at completion is complicated and subject to many variables and, accordingly, is subject to change. When adjustments in estimated total contract block revenue or estimated total cost are required, any changes from prior estimates for delivered units are recognized in the current period as a cumulative catch-up adjustment for the inception-to-date effect of such changes. Cumulative catch-up adjustments are driven by several factors including improved production efficiencies, assumed rate of production, the rate of overhead absorption, changes to scope of work, and contract modifications. When the total cost estimate exceeds the total revenue estimate on a contract block, a provision for the entire loss on the contract block is recorded in the period in which the loss is determined. Changes in estimates are summarized below: For the Three Months Ended Changes in Estimates March 30, 2017 March 31, 2016 (Unfavorable) Favorable Cumulative Catch-up Adjustment by Segment Fuselage $ (0.2 ) $ 16.2 Propulsion 1.5 5.9 Wing 8.0 10.1 Total Favorable Cumulative Catch-up Adjustment $ 9.3 $ 32.2 Changes in Estimates on Loss Programs and (Forward Loss) by Segment Fuselage $ (5.9 ) $ 3.1 Propulsion $ — $ 8.9 Wing $ 1.8 $ 3.0 Total (Forward Loss) and Change in Estimate on Loss Programs $ (4.1 ) $ 15.0 Total Change in Estimate $ 5.2 $ 47.2 EPS Impact (diluted per share based upon statutory rates) $ 0.03 $ 0.22

Accounts Receivable, net (Table

Accounts Receivable, net (Tables)	3 Months Ended
	Mar. 30, 2017
Accounts Receivable, Net, Current [Abstract]
Accounts Receivable, Net	Accounts receivable, net consists of the following: March 30, December 31, Trade receivables $ 805.6 $ 647.3 Other 13.9 18.4 Less: allowance for doubtful accounts (0.9 ) (5.2 ) Accounts receivable, net $ 818.6 $ 660.5

Inventory (Tables)

Inventory (Tables)	3 Months Ended
	Mar. 30, 2017
Inventory Disclosure [Abstract]
Summary Of Inventories	nventories are summarized as follows: March 30, December 31, Raw materials $ 299.0 $ 281.9 Work-in-process 772.1 790.7 Finished goods 28.9 30.9 Product inventory 1,100.0 1,103.5 Capitalized pre-production (1) 97.2 103.5 Deferred production (2) 689.5 717.4 Forward loss provision (3) (413.7 ) (409.1 ) Total inventory, net $ 1,473.0 $ 1,515.3 For contract blocks that have not closed, the following non-product inventory amounts were included in the inventory table above: (1) For the period ended March 30, 2017, $80.1 and $12.7 on the A350 XWB and Rolls-Royce BR725 programs, respectively. For the period ended December 31, 2016, $83.7 and $15.2 on the A350 XWB and Rolls-Royce BR725 programs, respectively. (2) For the period ended March 30, 2017, $653.8 and $118.1 on the A350 XWB and Rolls-Royce BR725 programs, respectively. For the period ended December 31, 2016, $657.2 and $114.6 on the A350 XWB and Rolls-Royce BR725 programs, respectively. (3) For the period ended March 30, 2017, ($259.9) and ($141.2) on the A350 XWB and Rolls-Royce BR725 programs, respectively. For the period ended December 31, 2016, ($255.8) and ($140.8) on the A350 XWB and Rolls-Royce BR725 programs, respectively. Includes a $2.1 reclassification between Work-in-process and Forward loss provision as of December 31, 2016.
Block and Orders	Significant amortization of capitalized pre-production and deferred production inventory has occurred over the following contract block deliveries and will continue to occur over the following contract blocks: Model Current Block Deliveries Contract Block Quantity A350 XWB 157 800 Rolls-Royce BR725 273 350

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	3 Months Ended
	Mar. 30, 2017
Property, Plant and Equipment [Abstract]
Property, plant and equipment, net	Property, plant and equipment, net consists of the following: March 30, December 31, Land $ 15.0 $ 14.9 Buildings (including improvements) 651.8 642.5 Machinery and equipment (1) 1,396.1 1,373.9 Tooling 986.3 982.4 Capitalized software (1) 261.9 261.9 Construction-in-progress 206.3 193.7 Total 3,517.4 3,469.3 Less: accumulated depreciation (1,531.1 ) (1,477.7 ) Property, plant and equipment, net $ 1,986.3 $ 1,991.6

Other Assets (Tables)

Other Assets (Tables)	3 Months Ended
	Mar. 30, 2017
Other Assets, Noncurrent [Abstract]
Other Assets	Other assets are summarized as follows: March 30, December 31, Intangible assets Patents $ 1.9 $ 1.9 Favorable leasehold interests 6.3 6.3 Total intangible assets 8.2 8.2 Less: Accumulated amortization - patents (1.8 ) (1.8 ) Accumulated amortization - favorable leasehold interest (4.3 ) (4.2 ) Intangible assets, net 2.1 2.2 Deferred financing Deferred financing costs 39.4 38.5 Less: Accumulated amortization - deferred financing costs (32.5 ) (32.2 ) Deferred financing costs, net 6.9 6.3 Other Goodwill - Europe 2.3 2.3 Equity in net assets of affiliates 4.4 4.4 Supply agreements (1) 13.6 17.0 Restricted cash - collateral requirements 19.9 19.9 Deferred Tax Asset - non-current 105.0 128.8 Other 39.7 40.0 Total $ 193.9 $ 220.9 (1) Under two agreements, certain payments accounted for as consideration paid by the Company to a customer and a supplier are being amortized as reductions to net revenues.

Advance Payments and Deferred34

Advance Payments and Deferred Revenue/Credits (Tables)	3 Months Ended
	Mar. 30, 2017
Advance Payments And Deferred Revenue Credits [Abstract]
Advance Payments And Deferred Revenue Credits Summarized	Advance payments and deferred revenue/credits are summarized by program as follows: March 30, December 31, B787 $ 798.6 $ 834.8 Boeing - All other programs 21.4 18.6 A350 XWB 85.8 116.7 Airbus — All other programs 1.9 2.2 Other 33.2 27.9 Total advance payments and deferred revenue/credits $ 940.9 $ 1,000.2

Government Grants (Tables)

Government Grants (Tables)	3 Months Ended
	Mar. 30, 2017
Government Grants [Abstract]
Deferred Grant Income Liability Net	Deferred grant income liability, net consists of the following: Balance, December 31, 2016 $ 77.8 Grant liability amortized (4.1 ) Exchange rate 0.2 Total deferred grant income liability, March 30, 2017 $ 73.9

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	The guidance discloses three levels of inputs that may be used to measure fair value: Level 1 Quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 1 assets and liabilities include debt and equity securities and derivative contracts that are traded in an active exchange market. Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments and derivative contracts whose value is determined using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data. Observable inputs, such as current and forward interest rates and foreign exchange rates, are used in determining the fair value of the interest rate swaps and foreign currency hedge contracts. Level 3 Unobservable inputs that are supported by little or no market activity and are significant to the fair value of assets and liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.
Carrying Amount And Estimated Fair Value Of Long Term Debt	The following table presents the carrying amount and estimated fair value of long-term debt: March 30, 2017 December 31, 2016 Carrying Amount Fair Value Carrying Amount Fair Value Senior unsecured term loan A (including current portion) $ 485.3 $ 486.5 (2) $ 485.2 $ 484.8 (2) Senior unsecured notes due 2022 294.0 306.6 (1) 293.8 307.0 (1) Senior unsecured notes due 2026 297.0 296.5 (1) 296.9 292.4 (1) Malaysian loan 0.5 0.5 (2) 1.0 0.9 (2) Total $ 1,076.8 $ 1,090.1 $ 1,076.9 $ 1,085.1 (1) Level 1 Fair Value hierarchy (2) Level 2 Fair Value hierarchy

Derivative and Hedging Activi37

Derivative and Hedging Activities (Tables)	3 Months Ended
	Mar. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest rate swaps

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 30, 2017
Debt Disclosure [Abstract]
Long Term Debt And Capital Lease Obligations Current And Non Current	Total debt shown on the balance sheet is comprised of the following: March 30, 2017 December 31, 2016 Current Noncurrent Current Noncurrent Senior unsecured term loan A $ 24.9 $ 460.4 $ 24.9 $ 460.3 Senior notes due 2022 — 294.0 — 293.8 Senior notes due 2026 — 297.0 — 296.9 Malaysian term loan 0.5 — 1.0 — Present value of capital lease obligations 1.4 12.5 0.8 9.0 Total $ 26.8 $ 1,063.9 $ 26.7 $ 1,060.0

Pension and Other Post-Retire39

Pension and Other Post-Retirement Benefits (Tables)	3 Months Ended
	Mar. 30, 2017
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Change in projected benefit obligations	3. Pension and Other Post-Retirement Benefits Defined Benefit Plans For the Three Months Ended Components of Net Periodic Pension Expense/(Income) March 30, March 31, Service cost $ 0.2 $ 0.3 Interest cost 9.6 11.7 Expected return on plan assets (18.3 ) (19.5 ) Amortization of net loss — 0.7 Special termination benefits (1) — 11.0 Net periodic pension (income) expense $ (8.5 ) $ 4.2 (1) Special termination benefits related to early retirement incentives offered as part of a voluntary r

Equity (Tables)

Equity (Tables)	3 Months Ended
	Mar. 30, 2017
Stockholders' Equity Note [Abstract]
Basic and Diluted Earnings per share	The following table sets forth the computation of basic and diluted earnings per share: For the Three Months Ended March 30, 2017 March 31, 2016 Income Shares Per Share Amount Income Shares Per Share Amount Basic EPS Income available to common stockholders $ 141.6 119.5 $ 1.19 $ 171.5 131.6 $ 1.30 Income allocated to participating securities 0.1 0.1 0.1 0.1 Net income $ 141.7 $ 171.6 Diluted potential common shares 1.1 1.0 Diluted EPS Net income $ 141.7 120.7 $ 1.17 $ 171.6 132.7 $ 1.29
Schedule of Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Loss is summarized by component as follows: As of As of March 30, 2017 December 31, 2016 Pension $ (98.5 ) $ (98.5 ) SERP/Retiree medical 20.1 20.5 Foreign currency impact on long term intercompany loan (18.1 ) (19.1 ) Currency translation adjustment (86.4 ) (89.8 ) Total accumulated other comprehensive loss $ (182.9 ) $ (186.9 )

Commitments, Contingencies an41

Commitments, Contingencies and Guarantees (Tables)	3 Months Ended
	Mar. 30, 2017
Commitments Contingencies And Guarantees [Abstract]
Service warranty roll forward	The following is a roll forward of the service warranty and extraordinary rework balance at March 30, 2017 : Balance, December 31, 2016 $ 163.7 Charges to costs and expenses 2.2 Payouts (1.1 ) Exchange rate 0.1 Balance, March 30, 2017 $ 164.9

Other Income (Expense), Net (Ta

Other Income (Expense), Net (Tables)	3 Months Ended
	Mar. 30, 2017
Other Nonoperating Income (Expense) [Abstract]
Other Income Expense Net	Other income (expense), net is summarized as follows: For the Three Months Ended March 30, March 31, Kansas Development Finance Authority bond $ 1.0 $ 1.1 Rental and miscellaneous income 0.1 0.1 Interest income 1.0 0.8 Foreign currency losses (0.6 ) (4.2 ) Total $ 1.5 $ (2.2 )

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 30, 2017
Segment Reporting [Abstract]
Segment Information	The following table shows segment revenues and operating income for the three months ended March 30, 2017 and March 31, 2016 : Three Months Ended March 30, March 31, Segment Revenues Fuselage Systems (1) $ 916.9 $ 875.8 Propulsion Systems 406.3 438.6 Wing Systems 369.0 360.5 All Other (1) 1.9 6.7 $ 1,694.1 $ 1,681.6 Segment Operating Income (Loss) Fuselage Systems (1) $ 150.4 $ 177.7 Propulsion Systems 73.7 99.1 Wing Systems 58.5 58.8 All Other (1) (0.1 ) 1.5 282.5 337.1 Corporate SG&A (51.9 ) (50.0 ) Impact of severe weather event (10.8 ) — Research and development (5.0 ) (6.1 ) Unallocated cost of sales (2) (1.2 ) (14.5 ) Total operating income $ 213.6 $ 266.5 (1) Includes a reclassification of $2.0 of revenues and $0.4 of operating income from the Other segment to the Fuselage segment for the three months ended March 31, 2016 . (2) Includes $1.2 and $2.3 of warranty reserve for the three months ended March 30, 2017 and March 31, 2016 , respectively.

Condensed Consolidating Finan44

Condensed Consolidating Financial Information (Tables)	3 Months Ended
	Mar. 30, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Income Statement	Condensed Consolidating Statements of Operations For the Three Months Ended March 30, 2017 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Net revenues $ — $ 1,520.1 $ 333.1 $ (159.1 ) $ 1,694.1 Operating costs and expenses Cost of sales — 1,272.9 299.0 (159.1 ) 1,412.8 Selling, general and administrative 1.6 46.8 3.5 — 51.9 Impact of severe weather event — 10.8 — — 10.8 Research and development — 4.1 0.9 — 5.0 Total operating costs and expenses 1.6 1,334.6 303.4 (159.1 ) 1,480.5 Operating (loss) income (1.6 ) 185.5 29.7 — 213.6 Interest expense and financing fee amortization — (9.5 ) (1.6 ) 1.6 (9.5 ) Other income (expense), net — 3.6 (0.5 ) (1.6 ) 1.5 (Loss) income before income taxes and equity in net income of affiliate and subsidiaries (1.6 ) 179.6 27.6 — 205.6 Income tax benefit (provision) 0.5 (60.4 ) (4.1 ) — (64.0 ) (Loss) income before equity in net income of affiliate and subsidiaries (1.1 ) 119.2 23.5 — 141.6 Equity in net income of affiliate 0.1 — 0.1 (0.1 ) 0.1 Equity in net income of subsidiaries 142.7 23.5 — (166.2 ) — Net income 141.7 142.7 23.6 (166.3 ) 141.7 Other comprehensive (loss) income 4.0 4.0 4.2 (8.2 ) 4.0 Comprehensive income (loss) $ 145.7 $ 146.7 $ 27.8 $ (174.5 ) $ 145.7 Condensed Consolidating Statements of Operations For the Three Months Ended March 31, 2016 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Net revenues $ — $ 1,510.5 $ 310.9 $ (139.8 ) $ 1,681.6 Operating costs and expenses Cost of sales — 1,214.4 284.4 (139.8 ) 1,359.0 Selling, general and administrative 1.5 44.2 4.3 — 50.0 Research and development — 5.0 1.1 — 6.1 Total operating costs and expenses 1.5 1,263.6 289.8 (139.8 ) 1,415.1 Operating (loss) income (1.5 ) 246.9 21.1 — 266.5 Interest expense and financing fee amortization — (11.3 ) (2.1 ) 2.0 (11.4 ) Other income (expense), net — 3.9 (4.1 ) (2.0 ) (2.2 ) (Loss) income before income taxes and equity in net income of affiliate and subsidiaries (1.5 ) 239.5 14.9 — 252.9 Income tax (provision) benefit 0.5 (78.7 ) (3.7 ) — (81.9 ) (Loss) income before equity in net income of affiliate and subsidiaries (1.0 ) 160.8 11.2 — 171.0 Equity in net income of affiliate 0.6 — 0.6 (0.6 ) 0.6 Equity in net income of subsidiaries 172.0 11.2 — (183.2 ) — Net income 171.6 172.0 11.8 (183.8 ) 171.6 Other comprehensive (loss) income (8.0 ) (8.0 ) (8.8 ) 16.8 (8.0 ) Comprehensive income (loss) $ 163.6 $ 164.0 $ 3.0 $ (167.0 ) $ 163.6
Condensed Balance Sheet	Condensed Consolidating Balance Sheet March 30, 2017 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Current assets Cash and cash equivalents $ — $ 654.6 $ 17.6 $ — $ 672.2 Restricted cash — 5.5 — — 5.5 Accounts receivable, net — 854.0 307.5 (342.9 ) 818.6 Inventory, net — 1,026.8 446.2 — 1,473.0 Other current assets — 22.4 6.4 — 28.8 Total current assets — 2,563.3 777.7 (342.9 ) 2,998.1 Property, plant and equipment, net — 1,463.7 522.6 — 1,986.3 Pension assets, net — 276.6 14.3 — 290.9 Investment in subsidiary 1,984.9 592.7 — (2,577.6 ) — Other assets — 404.0 120.9 (331.0 ) 193.9 Total assets $ 1,984.9 $ 5,300.3 $ 1,435.5 $ (3,251.5 ) $ 5,469.2 Current liabilities Accounts payable $ — $ 615.4 $ 419.1 $ (342.9 ) $ 691.6 Accrued expenses — 194.3 18.3 — 212.6 Profit sharing — 20.1 0.8 — 20.9 Current portion of long-term debt — 25.6 1.2 — 26.8 Advance payments, short-term — 183.0 — — 183.0 Deferred revenue and other deferred credits, short-term — 319.2 1.3 — 320.5 Deferred grant income liability - current — — 19.9 — 19.9 Other current liabilities — 125.3 1.0 — 126.3 Total current liabilities — 1,482.9 461.6 (342.9 ) 1,601.6 Long-term debt — 1,056.4 237.9 (230.4 ) 1,063.9 Advance payments, long-term — 305.8 — — 305.8 Pension/OPEB obligation — 42.6 — — 42.6 Deferred grant income liability - non-current — — 54.0 — 54.0 Deferred revenue and other deferred credits — 128.5 3.1 — 131.6 Other liabilities — 379.2 6.2 (100.6 ) 284.8 Total equity 1,984.9 1,904.9 672.7 (2,577.6 ) 1,984.9 Total liabilities and stockholders’ equity $ 1,984.9 $ 5,300.3 $ 1,435.5 $ (3,251.5 ) $ 5,469.2 Condensed Consolidating Balance Sheet December 31, 2016 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Current assets Cash and cash equivalents $ — $ 680.1 $ 17.6 $ — $ 697.7 Accounts receivable, net — 785.0 249.4 (373.9 ) 660.5 Inventory, net — 1,058.8 456.5 — 1,515.3 Other current assets — 29.0 7.9 — 36.9 Total current assets — 2,552.9 731.4 (373.9 ) 2,910.4 Property, plant and equipment, net — 1,462.3 529.3 — 1,991.6 Pension assets, net — 268.1 14.2 — 282.3 Investment in subsidiary 1,928.8 544.4 — (2,473.2 ) — Other assets — 398.9 101.4 (279.4 ) 220.9 Total assets $ 1,928.8 $ 5,226.6 $ 1,376.3 $ (3,126.5 ) $ 5,405.2 Current liabilities Accounts payable $ — $ 527.0 $ 426.6 $ (373.9 ) $ 579.7 Accrued expenses — 192.8 23.4 — 216.2 Profit sharing — 97.2 4.2 — 101.4 Current portion of long-term debt — 25.1 1.6 — 26.7 Advance payments, short-term — 199.3 — — 199.3 Deferred revenue and other deferred credits, short-term — 310.8 1.3 — 312.1 Deferred grant income liability - current — — 14.4 — 14.4 Other current liabilities — 94.2 0.2 — 94.4 Total current liabilities — 1,446.4 471.7 (373.9 ) 1,544.2 Long-term debt — 1,052.5 206.9 (199.4 ) 1,060.0 Advance payments, long-term — 342.0 — — 342.0 Pension/OPEB obligation — 43.9 — — 43.9 Deferred grant income liability - non-current — — 63.4 — 63.4 Deferred revenue and other deferred credits — 143.4 3.4 — 146.8 Other liabilities — 349.5 6.6 (80.0 ) 276.1 Total equity 1,928.8 1,848.9 624.3 (2,473.2 ) 1,928.8 Total liabilities and stockholders’ equity $ 1,928.8 $ 5,226.6 $ 1,376.3 $ (3,126.5 ) $ 5,405.2
Condensed Cash Flow Statement	Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Current assets Cash and cash equivalents $ — $ 680.1 $ 17.6 $ — $ 697.7 Accounts receivable, net — 785.0 249.4 (373.9 ) 660.5 Inventory, net — 1,058.8 456.5 — 1,515.3 Other current assets — 29.0 7.9 — 36.9 Total current assets — 2,552.9 731.4 (373.9 ) 2,910.4 Property, plant and equipment, net — 1,462.3 529.3 — 1,991.6 Pension assets, net — 268.1 14.2 — 282.3 Investment in subsidiary 1,928.8 544.4 — (2,473.2 ) — Other assets — 398.9 101.4 (279.4 ) 220.9 Total assets $ 1,928.8 $ 5,226.6 $ 1,376.3 $ (3,126.5 ) $ 5,405.2 Current liabilities Accounts payable $ — $ 527.0 $ 426.6 $ (373.9 ) $ 579.7 Accrued expenses — 192.8 23.4 — 216.2 Profit sharing — 97.2 4.2 — 101.4 Current portion of long-term debt — 25.1 1.6 — 26.7 Advance payments, short-term — 199.3 — — 199.3 Deferred revenue and other deferred credits, short-term — 310.8 1.3 — 312.1 Deferred grant income liability - current — — 14.4 — 14.4 Other current liabilities — 94.2 0.2 — 94.4 Total current liabilities — 1,446.4 471.7 (373.9 ) 1,544.2 Long-term debt — 1,052.5 206.9 (199.4 ) 1,060.0 Advance payments, long-term — 342.0 — — 342.0 Pension/OPEB obligation — 43.9 — — 43.9 Deferred grant income liability - non-current — — 63.4 — 63.4 Deferred revenue and other deferred credits — 143.4 3.4 — 146.8 Other liabilities — 349.5 6.6 (80.0 ) 276.1 Total equity 1,928.8 1,848.9 624.3 (2,473.2 ) 1,928.8 Total liabilities and stockholders’ equity $ 1,928.8 $ 5,226.6 $ 1,376.3 $ (3,126.5 ) $ 5,405.2 Condensed Consolidating Statements of Cash Flows For the Three Months Ended March 30, 2017 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Operating activities Net cash provided by operating activities $ — $ 107.6 $ 4.1 $ — $ 111.7 Investing activities Purchase of property, plant and equipment — (35.0 ) (5.6 ) — (40.6 ) Net cash used in investing activities — (35.0 ) (5.6 ) — (40.6 ) Financing activities Principal payments of debt — (0.1 ) (0.7 ) — (0.8 ) Proceeds (payments) from intercompany debt — (1.5 ) 1.5 — — Taxes paid related to net share settlement of awards — (4.1 ) — — (4.1 ) Debt issuance and financing costs — (1.0 ) — — (1.0 ) Proceeds from financing under the New Markets Tax Credit Program — 7.6 — — 7.6 Proceeds (payments) from subsidiary for purchase of treasury stock 81.5 (81.5 ) — — — Purchase of treasury stock (81.5 ) — — — (81.5 ) Change in restricted cash — (5.5 ) — — (5.5 ) Proceeds (payments) from subsidiary for dividends paid 12.0 (12.0 ) — — — Dividends Paid (12.0 ) — — — (12.0 ) Net cash used in financing activities — (98.1 ) 0.8 — (97.3 ) Effect of exchange rate changes on cash and cash equivalents — — 0.7 — 0.7 Net decrease in cash and cash equivalents for the period — (25.5 ) — — (25.5 ) Cash and cash equivalents, beginning of period — 680.1 17.6 — 697.7 Cash and cash equivalents, end of period $ — $ 654.6 $ 17.6 $ — $ 672.2 Condensed Consolidating Statements of Cash Flows For the Three Months Ended March 31, 2016 Holdings Spirit Non-Guarantor Subsidiaries Consolidating Adjustments Total Operating activities Net cash provided by (used in) operating activities $ — $ 101.5 $ (7.7 ) $ — $ 93.8 Investing activities Purchase of property, plant and equipment — (37.3 ) (13.1 ) — (50.4 ) Net cash used in investing activities — (37.3 ) (13.1 ) — (50.4 ) Financing activities Principal payments of debt — (6.7 ) (0.8 ) — (7.5 ) Excess tax benefits from share-based payment arrangements — 0.2 — — 0.2 Proceeds (payments) from intercompany debt — 12.5 (12.5 ) — — Taxes paid related to net share settlement of awards — (2.9 ) — — (2.9 ) Proceeds (payments) from subsidiary for purchase of treasury stock 165.2 (165.2 ) — — — Purchase of treasury stock (165.2 ) — — — (165.2 ) Net cash used in financing activities — (162.1 ) (13.3 ) — (175.4 ) Effect of exchange rate changes on cash and cash equivalents — — (2.4 ) — (2.4 ) Net increase in cash and cash equivalents for the period — (97.9 ) (36.5 ) — (134.4 ) Cash and cash equivalents, beginning of period — 894.2 63.1 — 957.3 Cash and cash equivalents, end of period $ — $ 796.3 $ 26.6 $ — $ 822.9

Changes in Estimates (Details)

Changes in Estimates (Details) - USD ($) $ / shares in Thousands, $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016
Change In Estimate [Line Items]
Changes in Contract Estimates, aggregate, Affecting earnings from Continuing Operations, per Share diluted	$ 30	$ 220
Change In Accounting Estimate, aggregate	$ 5.2	$ 47.2
Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	9.3	32.2
Change in Estimate on Loss Program [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting		15
Forward Loss [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	(4.1)
Fuselage Systems [Member] | Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	(0.2)	16.2
Fuselage Systems [Member] | Change in Estimate on Loss Program [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting		3.1
Fuselage Systems [Member] | Forward Loss [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	(5.9)
Wing Systems [Member] | Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	8	10.1
Wing Systems [Member] | Change in Estimate on Loss Program [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	1.8	3
Propulsion Systems [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	0
Propulsion Systems [Member] | Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	$ 1.5	5.9
Propulsion Systems [Member] | Change in Estimate on Loss Program [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting		$ 8.9

Accounts Receivable, net (Detai

Accounts Receivable, net (Details) - USD ($) $ in Millions	Mar. 30, 2017	Dec. 31, 2016
Accounts Receivable, Net, Current [Abstract]
Trade receivables	$ 805.6	$ 647.3
Other	13.9	18.4
Less: allowance for doubtful accounts	(0.9)	(5.2)
Accounts receivable, net	$ 818.6	$ 660.5

Inventory (Details)

Inventory (Details) - USD ($) $ in Millions	Mar. 30, 2017	Dec. 31, 2016
Summary Of Inventories [Abstract]
Raw materials	$ 299	$ 281.9
Work-in-process	772.1	790.7
Finished goods	28.9	30.9
Product inventory	1,100	1,103.5
Capitalized pre-production	97.2	103.5
Deferred Production Costs	689.5	717.4
Forward loss provision	(413.7)	(409.1)
Total inventory, net	$ 1,473	$ 1,515.3

Inventory (Details 1)

Inventory (Details 1) - USD ($) $ in Millions	Mar. 30, 2017	Dec. 31, 2016
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	$ 97.2	$ 103.5
Deferred Production Costs	689.5	717.4
Forward loss provision	(413.7)	(409.1)
Total inventory, net	1,473	1,515.3
Airbus Three Hundred Fifty XWB [Member]
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	80.1	83.7
Deferred Production Costs	653.8	657.2
Forward loss provision	(259.9)	(255.8)
Rolls-Royce
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	12.7	15.2
Deferred Production Costs	118.1	114.6
Forward loss provision	$ (141.2)	$ (140.8)

Inventory (Details 2)

Inventory (Details 2) $ in Millions	3 Months Ended
	Mar. 30, 2017USD ($)pure / $ship_set
Inventories [Line Items]
Reclassification - inventory | $	$ 2.1
Airbus Three Hundred Fifty XWB [Member]
Block And Order Detail [Abstract]
Contract Block Quantity	800
Contract Block Deliveries	157
Rolls-Royce
Block And Order Detail [Abstract]
Contract Block Quantity	350
Contract Block Deliveries	273

Property, Plant and Equipment50

Property, Plant and Equipment (Details) - USD ($) $ in Millions	Mar. 30, 2017	Dec. 31, 2016
Property, plant and equipment, net
Land	$ 15	$ 14.9
Buildings (including improvements)	651.8	642.5
Machinery and equipment	1,396.1	1,373.9
Tooling	986.3	982.4
Capitalized software	261.9	261.9
Construction-in-progress	206.3	193.7
Total	3,517.4	3,469.3
Less: accumulated depreciation	(1,531.1)	(1,477.7)
Property, plant and equipment, net	$ 1,986.3	$ 1,991.6

Property, Plant and Equipment51

Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016
Property Plant And Equipment Textuals [Abstract]
Repair and maintenance costs	$ 22.4	$ 26.6
Depreciation expense related to capitalized software	5.2	$ 4.5
Reclassification - PPE	$ 6.9

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Millions	Mar. 30, 2017	Dec. 31, 2016
Intangible assets
Total intangible assets	$ 8.2	$ 8.2
Intangible assets, net	2.1	2.2
Deferred financing costs	39.4	38.5
Less: Accumulated amortization-deferred financing costs	(32.5)	(32.2)
Deferred financing costs, net	6.9	6.3
Goodwill - Europe	2.3	2.3
Equity in net assets of affiliates	4.4	4.4
Customer Supply Agreement	13.6	17
Restricted Cash and Investments, Noncurrent	19.9	19.9
Deferred Tax Assets, Net, Noncurrent	105	128.8
Other	39.7	40
Total	193.9	220.9
Patents [Member]
Intangible assets
Total intangible assets	1.9	1.9
Less: Accumulated amortization	(1.8)	(1.8)
Favorable Leasehold Interests [Member]
Intangible assets
Total intangible assets	6.3	6.3
Less: Accumulated amortization	$ (4.3)	$ (4.2)

Advance Payments and Deferred53

Advance Payments and Deferred Revenue/Credits (Details) $ in Millions	3 Months Ended
	Mar. 30, 2017USD ($)pure / $	Dec. 31, 2016USD ($)
Advance payments and deferred revenue/credits summarized
Advance Payments And Deferred Revenue Credits	$ 940.9	$ 1,000.2
B737 [Member]
Advance payments and deferred revenue/credits summarized
Advance Payments And Deferred Revenue Credits	21.4	18.6
B787 [Member]
Advance payments and deferred revenue/credits summarized
Advance Payments And Deferred Revenue Credits	798.6	834.8
Airbus Three Hundred Fifty XWB [Member]
Advance payments and deferred revenue/credits summarized
Advance Payments And Deferred Revenue Credits	85.8	116.7
Airbus - All other platforms [Member]
Advance payments and deferred revenue/credits summarized
Advance Payments And Deferred Revenue Credits	1.9	2.2
Other Inventory [Member]
Advance payments and deferred revenue/credits summarized
Advance Payments And Deferred Revenue Credits	$ 33.2	$ 27.9
Minimum [Member]
Advance payments and deferred revenue/credits summarized
Boeing Advance Payment ShipSet	1,001
Maximum [Member]
Advance payments and deferred revenue/credits summarized
Boeing Advance Payment ShipSet	1,120

Government Grants (Details)

Government Grants (Details) $ in Millions	3 Months Ended
	Mar. 30, 2017USD ($)
Government Grants [Abstract]
Deferred Grant Income Liability beginning balance	$ 77.8
Deferred Grant Income Liability Net [Abstract]
Grant Liability Recorded	(4.1)
Deferred Grant Income Liability	73.9
Exchange Rate Effect On Deferred Grant Income Liability	$ 0.2

Government Grants (Details Text

Government Grants (Details Textuals)	3 Months Ended
	Mar. 30, 2017
Government Grants Textuals [Abstract]
Deferred Grant Income Amortization Period	10 years

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 30, 2017	Dec. 31, 2016
Carrying amount and estimated fair value of long term debt
Carrying Amount	$ 1,076.8	$ 1,076.9
Fair Value	1,090.1	1,085.1
Secured Debt Term A [Member]
Debt Instrument [Line Items]
Secured Debt, Current	24.9	24.9
Secured Long-term Debt, Noncurrent	460.4	460.3
Carrying amount and estimated fair value of long term debt
Carrying Amount	485.3	485.2
Fair Value	486.5	484.8
Senior unsecured notes due 2022 [Member]
Carrying amount and estimated fair value of long term debt
Carrying Amount	294	293.8
Fair Value	306.6	307
SeniorUnsecuredNotesDueTwoThousandAndTwentySix [Member] [Member]
Carrying amount and estimated fair value of long term debt
Carrying Amount	297	296.9
Fair Value	296.5	292.4
Malaysian loan [Member]
Carrying amount and estimated fair value of long term debt
Carrying Amount	0.5	1
Fair Value	$ 0.5	$ 0.9

Derivative and Hedging Activi57

Derivative and Hedging Activities (Details) $ in Millions	3 Months Ended
	Mar. 30, 2017USD ($)
Derivative [Line Items]
Interest Rate Swaps [Table Text Block]
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 250

Derivative and Hedging Activi58

Derivative and Hedging Activities (Details 1) - Interest Rate Swap [Member] $ in Millions	Mar. 30, 2017USD ($)
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 250
Derivative, Fixed Interest Rate	0.00%

Derivative and Hedging Activi59

Derivative and Hedging Activities (Details Textual) $ in Millions	3 Months Ended
	Mar. 30, 2017USD ($)
Derivatives Fair Value [Line Items]
LIBOR floor	0.75%
Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Derivative, Notional Amount	$ 250

Debt (Details)

Debt (Details) - USD ($) $ in Millions	Mar. 30, 2017	Dec. 31, 2016
Long Term Debt And Capital Lease Obligations Current And Non Current [Abstract]
Loans Payable to Bank, Current	$ 0.5	$ 1
Loans Payable to Bank, Noncurrent	0	0
Capital Lease Obligations, Current	1.4	0.8
Capital Lease Obligations, Noncurrent	12.5	9
Long-term Debt and Capital Lease Obligations, Current	26.8	26.7
Long-term Debt and Capital Lease Obligations	1,063.9	1,060
Secured Debt Term A [Member]
Debt Disclosure [Abstract]
Secured Debt, Current	24.9	24.9
Secured Long-term Debt, Noncurrent	460.4	460.3
Senior unsecured notes due 2022 [Member]
Long Term Debt And Capital Lease Obligations Current And Non Current [Abstract]
Senior Notes, Current	0	0
Senior Notes, Noncurrent	294	293.8
Senior Unsecured Notes Due 2026 [Member]
Long Term Debt And Capital Lease Obligations Current And Non Current [Abstract]
Senior Notes, Current	0	0
Senior Notes, Noncurrent	$ 297	$ 296.9

Debt (Details Textual)

Debt (Details Textual) $ in Thousands	3 Months Ended
	Mar. 30, 2017USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)	Jun. 01, 2016USD ($)	Mar. 18, 2015USD ($)	Mar. 18, 2014USD ($)
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 650,000
Senior Secured Credit Facility Term Libor Floor	0.75%
MinimumAdjustmentMarginOnLibor					1.125%
MaximumAdjustmentMarginOnLibor					2.00%
Minimum Adjustment Margin on Base Rate					0.125%
Maximum Adjustment Margin on Base Rate					1.00%
Proceeds from (Payments for) Other Financing Activities	$ 0	$ 0
Optional Revolver Commitment	500,000
Restricted Cash and Cash Equivalents	5,500		$ 0
Senior unsecured notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 300,000
Debt Instrument, Interest Rate, Stated Percentage						5.25%
Senior Notes	$ 294,000
Maturity Date 2022 Notes	Mar. 15, 2022
Senior Notes, Noncurrent	$ 294,000		293,800
Senior Notes, Current	$ 0		0
Senior Unsecured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 300,000
Debt Instrument, Interest Rate, Stated Percentage				3.85%
Maturity Date 2022 Notes	Jun. 15, 2026
Senior Notes, Noncurrent	$ 297,000		296,900
Senior Notes, Current	$ 0		$ 0
Amended and Restated Credit Agreement Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 500,000
Maturity Date 2012 Senior Secured Credit Facility Term	Jun. 4, 2021
Credit Agreement Margin on LIBOR					0.015
Margin On Base Rate Borrowing Term Loan					0.50%
Outstanding Balance Term Loan	$ 487,500
Debt Instrument, Periodic Payment, Principal	6,250
Carry Value Term Loan	$ 485,300

Pension and Other Post Retireme

Pension and Other Post Retirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016
Defined Benefit Plans [Member]
Pension and Other Post-Retirement Benefits
Service cost	$ 0.2	$ 0.3
Interest cost	9.6	11.7
Expected return on plan assets	(18.3)	(19.5)
Amortization of net loss	0	0.7
Defined Benefit Plan, Special Termination Benefits	0	11
Net periodic pension income	(8.5)	4.2
Other Benefits [Member]
Pension and Other Post-Retirement Benefits
Service cost	0.3	0.6
Interest cost	0.3	0.6
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(0.2)	0
Amortization of net loss	(0.6)	(0.1)
Defined Benefit Plan, Special Termination Benefits	0	3.1
Net periodic pension income	(0.2)	$ 4.2
U.K. pension plan [Member]
Pension And Other Post Retirement Benefits Textuals [Abstract]
Expected UK Pension Plan Contribution For The Year	0
Supplemental Executive Retirement Plan [Member]
Pension And Other Post Retirement Benefits Textuals [Abstract]
Defined Benefit Plan Estimated Future Employer Contributions Remainder Of Year	$ 8.9

Stock Compensation (Details)

Stock Compensation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company recognized total stock compensation expense, net of forfeitures	$ 8	$ 5.3
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	• 60% of the LTIAs consists of service-based restricted stock that vests in equal installments over a three-year period. • 20% of the LTIAs consists of market-based restricted stock that vests on the three-year anniversary of the grant date contingent upon TSR compared to the Company’s peers. • 20% of the LTIAs consists of performance-based restricted stock that vests on the three-year anniversary of the grant date contingent upon the Company’s cumulative three-year free cash flow as a percentage of the Company’s cumulative three-year revenues meeting certain thresholds.
LTIA AND Prior Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company recognized total stock compensation expense, net of forfeitures	$ 8	5.3
2014 through 2016 LTIA plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	• 75% of the LTIAs consists of service-based restricted stock that vests in equal installments over a three-year period. • 25% of the LTIAs consists of market-based restricted stock that vests on the three-year anniversary of the grant date contingent upon total shareholder return (“TSR”) compared to the Company’s peers.
Class A [Member] | Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	289,015
Grant date value of shares vested	$ 13.3
Class A [Member] | Market Based LTIA [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted	92,003
Fair Value Of Shares Granted	$ 5.1
Class A [Member] | Service Based LTIA [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted	322,159
Fair Value Of Shares Granted	$ 18.2
Class A [Member] | Performance Based LTIA [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted	92,992
Fair Value Of Shares Granted	$ 5.1
Selling General And Administrative Expense [Member] | LTIA AND Prior Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company recognized total stock compensation expense, net of forfeitures	$ 8	$ 5.3

Income Tax (details)

Income Tax (details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016	Dec. 31, 2016
Income Taxes Textuals [Abstract]
Deferred tax assets net total	$ (104.8)		$ (128.7)
Valuation Allowance [Line Items]
Excess Tax Benefit from Share-based Compensation, Operating Activities	$ 0	$ 0.3
Effective tax rate	31.10%	32.40%

Equity (Details)

Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.10	$ 0
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (182.9)		$ (186.9)
Basic EPS
Income available to common shareholders	$ 141.6	$ 171.5
Income available to common shareholders, shares	119.5	131.6
Income available to common shareholders, per share amount	$ 1.19	$ 1.30
Income allocated to participating securities	$ 0.1	$ 0.1
Income allocated to participating securities, shares	0.1	0.1
Net income	$ 141.7	$ 171.6
Diluted potential common shares	1.1	1
Diluted EPS
Net income	$ 141.7	$ 171.6
Shares	120.7	132.7
Per share amount	$ 1.17	$ 1.29
Equity Textuals [Abstract]
Common shares outstanding issued but unvested	1.9	2.2
Noncontrolling interest	$ 0.5		0.5
Pension [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(98.5)		(98.5)
SERP and Retiree medical [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	20.1		20.5
Foreign currency impact on long term intercompany loan [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(18.1)		(19.1)
Currency translation adjustment [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (86.4)		$ (89.8)

Commitments, Contingencies an66

Commitments, Contingencies and Guarantees (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 30, 2017	Dec. 31, 2016
Commitments Contingencies And Guarantees [Abstract]
Loss Contingency Accrual	$ 25	$ 25
net present value of alleged amount of UAW arbitration liability	39
Litigation settlement amount against Boeing	90
Attorneys fees sought by Boeing related to UAW arbitration	10
Service warranty roll forward
Product Warranty And Extraordinary Rework	163.7
Charges to costs and expenses	2.2
Product Warranty Accrual, Payments	(1.1)
Product Warranty And Extraordinary Rework	164.9	163.7
Product Warranty Extraordinary Rework Accrual Currency Translation Increase Decrease	0.1
Commitments Contingencies And Guarantees Textuals [Abstract]
Outstanding amount of guarantees	19.2	20.7
Restricted Cash and Investments, Noncurrent	19.9	19.9
Product Liability Accrual, Component Amount	100	99
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate	$ 209	$ 209

Other Income (Expense), Net (De

Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016
Other Nonoperating Income (Expense) [Abstract]
KDFA bond	$ 1	$ 1.1
Rental and miscellaneous income (expense)	0.1	0.1
Interest Income, Other	1	0.8
Foreign currency losses	(0.6)	(4.2)
Total	$ 1.5	$ (2.2)

Segment Information (Details)

Segment Information (Details) $ in Millions	3 Months Ended
	Mar. 30, 2017USD ($)segment	Mar. 31, 2016USD ($)
Segment Revenues
Revenues	$ 1,694.1	$ 1,681.6
Segment Operating Income
Business Segment Operating Income	282.5	337.1
Segment Information Unallocated Corporate Selling General And Administrative	(51.9)	(50)
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds	(10.8)	0
Segment Information Unallocated Research And Development	(5)	(6.1)
Segment Information Unallocated Cost Of Sales	(1.2)	(14.5)
Operating income	$ 213.6	266.5
Segment Reporting Information, Additional Information [Abstract]
Number Of Principal Segments | segment	3
Product Warranty Expense	$ 1.2	2.3
Early Retirement Incentive	11.8
Fuselage Systems [Member]
Segment Revenues
Segment Revenues	916.9	875.8
Segment Operating Income
Business Segment Operating Income	150.4	177.7
Propulsion Systems [Member]
Segment Revenues
Segment Revenues	406.3	438.6
Segment Operating Income
Business Segment Operating Income	73.7	99.1
Wing Systems [Member]
Segment Revenues
Segment Revenues	369	360.5
Segment Operating Income
Business Segment Operating Income	58.5	58.8
Other Systems [Member]
Segment Revenues
Segment Revenues	1.9	6.7
Segment Operating Income
Business Segment Operating Income	(0.1)	$ 1.5
Immaterial reclassification of segment revenue [Member] | Other Systems [Member]
Segment Revenues
Segment Revenues	2
Segment Operating Income
Business Segment Operating Income	$ 0.4

Condensed Consolidating Finan69

Condensed Consolidating Financial Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2017	Mar. 31, 2016	Mar. 30, 2017	Dec. 31, 2016
Condensed Consolidating Statements of Operations [Abstract]
Net revenues	$ 1,694.1	$ 1,681.6
Operating costs and expenses
Cost of sales	1,412.8	1,359
Selling, general and administrative	51.9	50
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds	10.8	0
Research and development	5	6.1
Total operating costs and expenses	1,480.5	1,415.1
Operating income	213.6	266.5
Interest expense and financing fee amortization	(9.5)	(11.4)
Other expense, net	1.5	(2.2)
Income (loss) before income taxes and equity in net loss of affiliates and subsidiaries	205.6	252.9
Income tax (provision) benefit	(64)	(81.9)
Income (loss) Before Equity In Net Income (Loss) Of Affiliates and Subsidiaries	141.6	171
Equity in net income of affiliate	0.1	0.6
Equity in net income of subsidiaries	0
Net income	141.7	171.6
Total other comprehensive income (loss)	4	(8)
Comprehensive Income, Net of Tax, Attributable to Parent	145.7	163.6
Current assets
Cash and cash equivalents	697.7	957.3	$ 672.2	$ 697.7
Restricted Cash and Cash Equivalents			5.5	0
Accounts receivable, net			818.6	660.5
Inventory			1,473	1,515.3
Other current assets			28.8	36.9
Total current assets			2,998.1	2,910.4
Property, plant and equipment, net			1,986.3	1,991.6
Pension assets			290.9	282.3
Other assets			193.9	220.9
Total assets			5,469.2	5,405.2
Current liabilities
Accounts payable			691.6	579.7
Accrued expenses			212.6	216.2
Profit sharing			20.9	101.4
Current portion of long-term debt			26.8	26.7
Advance payments, short-term			183	199.3
Deferred revenue and other deferred credits, short-term			320.5	312.1
Deferred grant income liability - current			19.9	14.4
Other current liabilities			126.3	94.4
Total current liabilities			1,601.6	1,544.2
Long-term debt			1,063.9	1,060
Advance payments, long-term			305.8	342
Pension/OPEB obligation			42.6	43.9
Deferred grant income liability - non-current			54	63.4
Deferred revenue and other deferred credits			131.6	146.8
Other liabilities			284.8	276.1
Total equity			1,984.9	1,928.8
Total liabilities and equity			5,469.2	5,405.2
Operating activities
Net cash (used in) operating activities	111.7	93.8
Investing activities
Purchase of property, plant and equipment	(40.6)	(50.4)
Net cash used in investing activities	(40.6)	(50.4)
Financing activities
Principal payments of debt	(0.8)	(7.5)
Payments Related to Tax Withholding for Share-based Compensation	(4.1)	(2.9)
Debt issuance and financing costs	(1)	0
Proceeds from Other Debt	7.6	0
Proceeds from (Payments for) Other Financing Activities	0	0
Payments for Repurchase of Common Stock	(81.5)	(165.2)
Proceeds from (Repayments of) Restricted Cash, Financing Activities	(5.5)	0
Proceeds from subsidiary (payments to Parent) to pay dividends	0
Payments of Dividends	(12)	0
Excess tax benefit of share-based payment arrangements	0	0.2
Net cash used in financing activities	(97.3)	(175.4)
Effect of exchange rate changes on cash and cash equivalents	0.7	(2.4)
Net (decrease) increase in cash and cash equivalents for the period	(25.5)	(134.4)
Cash and cash equivalents, beginning of period	697.7	957.3
Cash and cash equivalents, end of period	672.2	822.9
Consolidation, Eliminations [Member]
Condensed Consolidating Statements of Operations [Abstract]
Net revenues	(159.1)	(139.8)
Operating costs and expenses
Cost of sales	(159.1)	(139.8)
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds	0
Total operating costs and expenses	(159.1)	(139.8)
Interest expense and financing fee amortization	1.6	2
Other expense, net	(1.6)	(2)
Equity in net income of affiliate	(0.1)	(0.6)
Equity in net income of subsidiaries	(166.2)	(183.2)
Net income	(166.3)	(183.8)
Total other comprehensive income (loss)	(8.2)	16.8
Comprehensive Income, Net of Tax, Attributable to Parent	(174.5)	(167)
Current assets
Restricted Cash and Cash Equivalents			0
Accounts receivable, net			(342.9)	(373.9)
Total current assets			(342.9)	(373.9)
Investment in subsidiary			(2,577.6)	(2,473.2)
Other assets			(331)	(279.4)
Total assets			(3,251.5)	(3,126.5)
Current liabilities
Accounts payable			(342.9)	(373.9)
Total current liabilities			(342.9)	(373.9)
Long-term debt			(230.4)	(199.4)
Other liabilities			(100.6)	(80)
Total equity			(2,577.6)	(2,473.2)
Total liabilities and equity			(3,251.5)	(3,126.5)
Financing activities
Payments Related to Tax Withholding for Share-based Compensation	0	0
Debt issuance and financing costs	0
Proceeds from Other Debt	0
Proceeds from (Payments for) Other Financing Activities	0	0
Payments for Repurchase of Common Stock		0
Proceeds from (Repayments of) Restricted Cash, Financing Activities	0
Proceeds from subsidiary (payments to Parent) to pay dividends	0
Payments of Dividends	0
Excess tax benefit of share-based payment arrangements		0
Parent Company [Member]
Operating costs and expenses
Selling, general and administrative	1.6	1.5
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds	0
Total operating costs and expenses	1.6	1.5
Operating income	(1.6)	(1.5)
Income (loss) before income taxes and equity in net loss of affiliates and subsidiaries	(1.6)	(1.5)
Income tax (provision) benefit	0.5	0.5
Income (loss) Before Equity In Net Income (Loss) Of Affiliates and Subsidiaries	(1.1)	(1)
Equity in net income of affiliate	0.1	0.6
Equity in net income of subsidiaries	142.7	172
Net income	141.7	171.6
Total other comprehensive income (loss)	4	(8)
Comprehensive Income, Net of Tax, Attributable to Parent	145.7	163.6
Current assets
Restricted Cash and Cash Equivalents			0
Investment in subsidiary			1,984.9	1,928.8
Total assets			1,984.9	1,928.8
Current liabilities
Total equity			1,984.9	1,928.8
Total liabilities and equity			1,984.9	1,928.8
Financing activities
Payments Related to Tax Withholding for Share-based Compensation	0	0
Debt issuance and financing costs	0
Proceeds from Other Debt	0
Proceeds from (Payments for) Other Financing Activities	81.5	165.2
Payments for Repurchase of Common Stock	(81.5)	(165.2)
Proceeds from (Repayments of) Restricted Cash, Financing Activities	0
Proceeds from subsidiary (payments to Parent) to pay dividends	12
Payments of Dividends	(12)
Excess tax benefit of share-based payment arrangements		0
Non-Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations [Abstract]
Net revenues	333.1	310.9
Operating costs and expenses
Cost of sales	299	284.4
Selling, general and administrative	3.5	4.3
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds	0
Research and development	0.9	1.1
Total operating costs and expenses	303.4	289.8
Operating income	29.7	21.1
Interest expense and financing fee amortization	(1.6)	(2.1)
Other expense, net	(0.5)	(4.1)
Income (loss) before income taxes and equity in net loss of affiliates and subsidiaries	27.6	14.9
Income tax (provision) benefit	(4.1)	(3.7)
Income (loss) Before Equity In Net Income (Loss) Of Affiliates and Subsidiaries	23.5	11.2
Equity in net income of affiliate	0.1	0.6
Net income	23.6	11.8
Total other comprehensive income (loss)	4.2	(8.8)
Comprehensive Income, Net of Tax, Attributable to Parent	27.8	3
Current assets
Cash and cash equivalents	17.6	63.1	17.6	17.6
Restricted Cash and Cash Equivalents			0
Accounts receivable, net			307.5	249.4
Inventory			446.2	456.5
Other current assets			6.4	7.9
Total current assets			777.7	731.4
Property, plant and equipment, net			522.6	529.3
Pension assets			14.3	14.2
Other assets			120.9	101.4
Total assets			1,435.5	1,376.3
Current liabilities
Accounts payable			419.1	426.6
Accrued expenses			18.3	23.4
Profit sharing			0.8	4.2
Current portion of long-term debt			1.2	1.6
Deferred revenue and other deferred credits, short-term			1.3	1.3
Deferred grant income liability - current			19.9	14.4
Other current liabilities			1	0.2
Total current liabilities			461.6	471.7
Long-term debt			237.9	206.9
Deferred grant income liability - non-current			54	63.4
Deferred revenue and other deferred credits			3.1	3.4
Other liabilities			6.2	6.6
Total equity			672.7	624.3
Total liabilities and equity			1,435.5	1,376.3
Operating activities
Net cash (used in) operating activities	4.1	(7.7)
Investing activities
Purchase of property, plant and equipment	(5.6)	(13.1)
Net cash used in investing activities	(5.6)	(13.1)
Financing activities
Principal payments of debt	(0.7)	(0.8)
Collection on (repayment of) intercompany debt	1.5	(12.5)
Payments Related to Tax Withholding for Share-based Compensation	0	0
Debt issuance and financing costs	0
Proceeds from Other Debt	0
Proceeds from (Payments for) Other Financing Activities	0	0
Payments for Repurchase of Common Stock		0
Proceeds from (Repayments of) Restricted Cash, Financing Activities	0
Proceeds from subsidiary (payments to Parent) to pay dividends	0
Payments of Dividends	0
Excess tax benefit of share-based payment arrangements		0
Net cash used in financing activities	0.8	(13.3)
Effect of exchange rate changes on cash and cash equivalents	0.7	(2.4)
Net (decrease) increase in cash and cash equivalents for the period		(36.5)
Cash and cash equivalents, beginning of period	17.6	63.1
Cash and cash equivalents, end of period	17.6	26.6
Subsidiary Issuer [Member]
Condensed Consolidating Statements of Operations [Abstract]
Net revenues	1,520.1	1,510.5
Operating costs and expenses
Cost of sales	1,272.9	1,214.4
Selling, general and administrative	46.8	44.2
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds	10.8
Research and development	4.1	5
Total operating costs and expenses	1,334.6	1,263.6
Operating income	185.5	246.9
Interest expense and financing fee amortization	(9.5)	(11.3)
Other expense, net	3.6	3.9
Income (loss) before income taxes and equity in net loss of affiliates and subsidiaries	179.6	239.5
Income tax (provision) benefit	(60.4)	(78.7)
Income (loss) Before Equity In Net Income (Loss) Of Affiliates and Subsidiaries	119.2	160.8
Equity in net income of subsidiaries	23.5	11.2
Net income	142.7	172
Total other comprehensive income (loss)	4	(8)
Comprehensive Income, Net of Tax, Attributable to Parent	146.7	164
Current assets
Cash and cash equivalents	680.1	894.2	654.6	680.1
Restricted Cash and Cash Equivalents			5.5
Accounts receivable, net			854	785
Inventory			1,026.8	1,058.8
Other current assets			22.4	29
Total current assets			2,563.3	2,552.9
Property, plant and equipment, net			1,463.7	1,462.3
Pension assets			276.6	268.1
Investment in subsidiary			592.7	544.4
Other assets			404	398.9
Total assets			5,300.3	5,226.6
Current liabilities
Accounts payable			615.4	527
Accrued expenses			194.3	192.8
Profit sharing			20.1	97.2
Current portion of long-term debt			25.6	25.1
Advance payments, short-term			183	199.3
Deferred revenue and other deferred credits, short-term			319.2	310.8
Other current liabilities			125.3	94.2
Total current liabilities			1,482.9	1,446.4
Long-term debt			1,056.4	1,052.5
Advance payments, long-term			305.8	342
Pension/OPEB obligation			42.6	43.9
Deferred revenue and other deferred credits			128.5	143.4
Other liabilities			379.2	349.5
Total equity			1,904.9	1,848.9
Total liabilities and equity			$ 5,300.3	$ 5,226.6
Operating activities
Net cash (used in) operating activities	107.6	101.5
Investing activities
Purchase of property, plant and equipment	(35)	(37.3)
Net cash used in investing activities	(35)	(37.3)
Financing activities
Principal payments of debt	(0.1)	(6.7)
Collection on (repayment of) intercompany debt	(1.5)	12.5
Payments Related to Tax Withholding for Share-based Compensation	(4.1)	(2.9)
Debt issuance and financing costs	(1)
Proceeds from Other Debt	7.6
Proceeds from (Payments for) Other Financing Activities	(81.5)	(165.2)
Proceeds from (Repayments of) Restricted Cash, Financing Activities	(5.5)
Proceeds from subsidiary (payments to Parent) to pay dividends	(12)
Payments of Dividends	0
Excess tax benefit of share-based payment arrangements		0.2
Net cash used in financing activities	(98.1)	(162.1)
Net (decrease) increase in cash and cash equivalents for the period	(25.5)	(97.9)
Cash and cash equivalents, beginning of period	680.1	894.2
Cash and cash equivalents, end of period	$ 654.6	$ 796.3

New Market Tax Credit (Details)

New Market Tax Credit (Details) - USD ($) $ in Millions	Mar. 30, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$ 9.7
Restricted Cash and Cash Equivalents	5.5	$ 0
New Market Tax Credit [Member]
Variable Interest Entity [Line Items]
Loans Receivable, Net	$ 20.6