Condensed Consolidating Financial Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Oct. 01, 2020	Jul. 02, 2020	Apr. 02, 2020	Dec. 31, 2019	Sep. 26, 2019	Jun. 27, 2019	Mar. 28, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,873.3				$ 2,350.5				$ 1,873.3	$ 2,350.5	$ 773.6	$ 423.3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,893.1				2,367.2				1,893.1	2,367.2	794.1	445.5
Restricted Cash, Current	0.3				0.3				0.3	0.3	0.3	2.2
Condensed Consolidating Statements of Operations [Abstract]
Net revenues	876.6	$ 806.3	$ 644.6	$ 1,077.3	1,959.3	$ 1,919.9	$ 2,016.1	$ 1,967.8	3,404.8	7,863.1	7,222.0
Operating costs and expenses
Cost of sales									3,845.5	6,786.4	6,135.9
Selling, general and administrative									237.4	261.4	210.4
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds									0.0	0.0	(10.0)
Research and development									38.8	54.5	42.5
Total operating costs and expenses									4,217.6	7,102.3	6,378.8
Operating income (loss)	(101.4)	(176.9)	(367.0)	(167.5)	95.7	206.1	226.0	233.0	(812.8)	760.8	843.2
Interest expense and financing fee amortization									(195.3)	(91.9)	(80.0)
Other income, net									(77.8)	(5.8)	(7.0)
Income (loss) before income taxes and equity in net income (loss) of affiliates and subsidiaries									(1,085.9)	663.1	756.2
Income tax benefit (provision)									220.2	(132.8)	(139.8)
Income (loss) before equity in net income of affiliates and subsidiaries									(865.7)	530.3	616.4
Equity in net (loss) income of affiliates									(4.6)	(0.2)	0.6
Equity in net income of subsidiaries									0.0	0.0	0.0
Net (loss) income	(295.9)	(155.5)	(255.9)	(163.0)	67.7	$ 131.3	$ 168.0	$ 163.1	(870.3)	530.1	617.0
Total other comprehensive income (loss)									(44.9)	95.7	(68.1)
Comprehensive income (loss)									(915.2)	625.8	548.9
Assets
Accounts receivable, net	484.4				546.4				484.4	546.4
Total current assets	1,422.3				1,118.8				1,422.3	1,118.8
Unbilled Contracts Receivable					528.3					528.3
Unbilled Receivables, Current	368.4				528.3				368.4	528.3
Other current assets	336.3				98.7				336.3	98.7
Total current assets	4,485.0				4,643.0				4,485.0	4,643.0
Property, plant and equipment, net	2,503.8				2,271.7				2,503.8	2,271.7	2,167.6
Operating Lease, Right-of-Use Asset	70.6				48.9				70.6	48.9
Unbilled Receivable, Non Current	4.4				6.4				4.4	6.4
Pension assets	455.9				449.1				455.9	449.1
Intangible assets, net	0.0				0.0				0.0	0.0
Deferred tax asset-non-current, net	0.1				106.5				0.1	106.5
Goodwill	565.3				2.4				565.3	2.4
Other assets	83.6				76.8				83.6	76.8
Assets	8,383.9				7,606.0				8,383.9	7,606.0
Liabilities
Accounts payable	558.9				1,058.3				558.9	1,058.3
Accrued expenses	365.6				240.2				365.6	240.2
Profit sharing	57.0				84.5				57.0	84.5
Current portion of long-term debt	340.7				50.2				340.7	50.2
Operating Lease, Liability, Current	5.5				6.0				5.5	6.0
Advance payments, short-term	18.9				21.6				18.9	21.6
Billings in Excess of Cost, Current	97.6				158.3				97.6	158.3
Provision for Loss on Contracts	184.6				83.9				184.6	83.9
Deferred revenue and other deferred credits, short-term	22.2				14.8				22.2	14.8
Deferred grant income liability — current	0.0				3.6				0.0	3.6
Other current liabilities	58.4				39.3				58.4	39.3
Total current liabilities	1,709.4				1,760.7				1,709.4	1,760.7
Long-term debt	3,532.9				2,984.1				3,532.9	2,984.1
Operating Lease, Liability, Noncurrent	66.6				43.0				66.6	43.0
Advance payments, long-term	327.4				333.3				327.4	333.3
Pension/OPEB obligation	440.2				35.7				440.2	35.7
Billings in Excess of Cost, Noncurrent	372.0				356.3				372.0	356.3
Provision for Loss on Contacts, Non Current	561.4				163.5				561.4	163.5
Deferred grant income liability — non-current	28.1				29.0				28.1	29.0
Deferred revenue and other deferred credits	38.9				34.4				38.9	34.4
Deferred Tax Liabilities, Net, Noncurrent	13.0				8.3				13.0	8.3
Other non-current liabilities	437.0				95.8				437.0	95.8
Total equity	857.0				1,761.9				857.0	1,761.9
Total liabilities and equity	8,383.9				7,606.0				8,383.9	7,606.0
Operating activities
Net cash provided (used in) by operating activities									(744.9)	922.7	769.9
Investing activities
Purchase of property, plant and equipment									(118.9)	(232.2)	(271.2)
Payments to Acquire Businesses, Net of Cash Acquired									(388.5)
Other									5.4	(7.7)	3.4
Net cash used in investing activities									(502.0)	(239.9)	(267.8)
Financing activities
Proceeds from Issuance of Senior Long-term Debt									1,700.0	250.0	1,300.0
Proceeds from Lines of Credit									0.0	900.0	0.0
Proceeds from Issuance of Secured Debt									400.0
Proceeds from (Repayments of) Other Debt									10.0
Principal payments of debt									(31.6)	(13.4)	(6.7)
Payments on term loans									0.0	0.0	0.0
Repayments of Debt									(439.7)	(16.6)	(256.3)
Repayments of Unsecured Debt											(300.0)
Repayments of Lines of Credit									(800.0)	(100.0)	0.0
Payment, Tax Withholding, Share-based Payment Arrangement									(14.5)	(12.9)	(15.6)
Proceeds from Stock Plans									2.6	2.6	2.1
Proceeds from (Payments for) Other Financing Activities									(0.1)	0.9
Payments for Repurchase of Common Stock									(0.1)	(75.8)	(805.8)
Proceeds from subsidiary (payments to Parent) to pay dividends									0.0	0.0	0.0
Payments of Dividends									(15.4)	(50.4)	(48.0)
Other Financing Cash Flows									(0.1)	0.9
Net cash provided by (used in) financing activities									769.5	884.4	(153.5)
Effect of exchange rate changes on cash and cash equivalents									3.3	5.9	0.0
Net (decrease) increase in cash, cash equivalents, and restricted cash for the period									(474.1)	1,573.1	348.6
Intangible Assets, Net (Excluding Goodwill)	215.2				1.2				215.2	1.2
Payments of Financing Costs									(41.9)	0.0	(23.2)
Restructuring Charges	4.6	$ 19.5	6.3	$ 42.6					73.0	0.0	0.0
Gain (Loss) on Disposition of Property Plant Equipment			$ (22.9)						22.9	0.0	0.0
Proceeds (payments) from subsidiary for purchase of treasury stock									0.0	0.0	0.0
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0.0				0.0				0.0	0.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	0.0				0.0				0.0	0.0	0.0	0.0
Restricted Cash, Current	0.0				0.0				0.0	0.0
Condensed Consolidating Statements of Operations [Abstract]
Net revenues									0.0	0.0	0.0
Operating costs and expenses
Cost of sales									0.0	0.0	0.0
Selling, general and administrative									13.9	18.1	10.4
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds
Research and development									0.0	0.0	0.0
Total operating costs and expenses									13.9	18.1	10.4
Operating income (loss)									(13.9)	(18.1)	(10.4)
Interest expense and financing fee amortization									0.0	0.0	0.0
Other income, net									0.0	0.0	0.0
Income (loss) before income taxes and equity in net income (loss) of affiliates and subsidiaries									(13.9)	(18.1)	(10.4)
Income tax benefit (provision)									2.9	3.9	1.9
Income (loss) before equity in net income of affiliates and subsidiaries									(11.0)	(14.2)	(8.5)
Equity in net (loss) income of affiliates									0.0	(0.2)	0.6
Equity in net income of subsidiaries									(859.3)	544.5	624.9
Net (loss) income									(870.3)	530.1	617.0
Total other comprehensive income (loss)									(44.9)	95.7	(68.1)
Comprehensive income (loss)									(915.2)	625.8	548.9
Assets
Accounts receivable, net	0.0				0.0				0.0	0.0
Total current assets	0.0				0.0				0.0	0.0
Unbilled Contracts Receivable					0.0					0.0
Unbilled Receivables, Current	0.0								0.0
Other current assets	0.0				0.0				0.0	0.0
Total current assets	0.0				0.0				0.0	0.0
Property, plant and equipment, net	0.0				0.0				0.0	0.0
Operating Lease, Right-of-Use Asset	0.0				0.0				0.0	0.0
Unbilled Receivable, Non Current	0.0				0.0				0.0	0.0
Pension assets	0.0				0.0				0.0	0.0
Intangible assets, net	856.9				1,761.9				856.9	1,761.9
Deferred tax asset-non-current, net	0.0				0.0				0.0	0.0
Goodwill	0.0				0.0				0.0	0.0
Other assets	0.0				0.0				0.0	0.0
Assets	856.9				1,761.9				856.9	1,761.9
Liabilities
Accounts payable	0.0				0.0				0.0	0.0
Accrued expenses	0.0				0.0				0.0	0.0
Profit sharing	0.0				0.0				0.0	0.0
Current portion of long-term debt	0.0				0.0				0.0	0.0
Operating Lease, Liability, Current	0.0				0.0				0.0	0.0
Advance payments, short-term	0.0				0.0				0.0	0.0
Billings in Excess of Cost, Current	0.0				0.0				0.0	0.0
Provision for Loss on Contracts	0.0				0.0				0.0	0.0
Deferred revenue and other deferred credits, short-term	0.0				0.0				0.0	0.0
Deferred grant income liability — current					0.0					0.0
Other current liabilities	0.0				0.0				0.0	0.0
Total current liabilities	0.0				0.0				0.0	0.0
Long-term debt	0.0				0.0				0.0	0.0
Operating Lease, Liability, Noncurrent	0.0				0.0				0.0	0.0
Advance payments, long-term	0.0				0.0				0.0	0.0
Pension/OPEB obligation	0.0				0.0				0.0	0.0
Billings in Excess of Cost, Noncurrent	0.0				0.0				0.0	0.0
Provision for Loss on Contacts, Non Current	0.0				0.0				0.0	0.0
Deferred grant income liability — non-current	0.0				0.0				0.0	0.0
Deferred revenue and other deferred credits	0.0				0.0				0.0	0.0
Deferred Tax Liabilities, Net, Noncurrent	0.0				0.0				0.0	0.0
Other non-current liabilities	0.0				0.0				0.0	0.0
Total equity	856.9				1,761.9				856.9	1,761.9
Total liabilities and equity	856.9				1,761.9				856.9	1,761.9
Operating activities
Net cash provided (used in) by operating activities									0.0	0.0	0.0
Investing activities
Purchase of property, plant and equipment									0.0	0.0	0.0
Payments to Acquire Businesses, Net of Cash Acquired									0.0
Other									0.0	0.0	0.0
Net cash used in investing activities									0.0	0.0	0.0
Financing activities
Proceeds from Issuance of Senior Long-term Debt									0.0	0.0	0.0
Proceeds from Lines of Credit										0.0
Proceeds from Issuance of Secured Debt									0.0
Proceeds from (Repayments of) Other Debt									0.0
Principal payments of debt									0.0	0.0	0.0
Payments on term loans									0.0	0.0	0.0
Repayments of Debt									0.0	0.0	0.0
Repayments of Unsecured Debt											0.0
Repayments of Lines of Credit									0.0	0.0
Payment, Tax Withholding, Share-based Payment Arrangement									0.0	0.0	0.0
Proceeds from Stock Plans									0.0	0.0	0.0
Proceeds from (Payments for) Other Financing Activities
Payments for Repurchase of Common Stock									0.1	75.8	805.8
Proceeds from subsidiary (payments to Parent) to pay dividends									(15.4)	(50.4)	(48.0)
Payments of Dividends									15.4	50.4	48.0
Net cash provided by (used in) financing activities									0.0	0.0	0.0
Effect of exchange rate changes on cash and cash equivalents									0.0	0.0	0.0
Net (decrease) increase in cash, cash equivalents, and restricted cash for the period									0.0	0.0	0.0
Intangible Assets, Net (Excluding Goodwill)	0.0				0.0				0.0	0.0
Payments of Financing Costs									0.0		0.0
Restructuring Charges									0.0
Gain (Loss) on Disposition of Property Plant Equipment									0.0
Proceeds (payments) from subsidiary for purchase of treasury stock									(0.1)	75.8	805.8
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	208.8				157.2				208.8	157.2
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	208.7				157.2				208.7	157.2	68.6	58.2
Restricted Cash, Current	0.0				0.0				0.0	0.0
Condensed Consolidating Statements of Operations [Abstract]
Net revenues									689.0	965.5	919.3
Operating costs and expenses
Cost of sales									663.8	823.7	792.7
Selling, general and administrative									19.9	16.8	15.3
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds
Research and development									6.5	6.4	4.2
Total operating costs and expenses									700.7	846.9	812.2
Operating income (loss)									(11.7)	118.6	107.1
Interest expense and financing fee amortization									(5.8)	(3.9)	(5.2)
Other income, net									(20.0)	(2.7)	(2.1)
Income (loss) before income taxes and equity in net income (loss) of affiliates and subsidiaries									(37.5)	112.0	99.8
Income tax benefit (provision)									4.5	(13.9)	(16.9)
Income (loss) before equity in net income of affiliates and subsidiaries									(33.0)	98.1	82.9
Equity in net (loss) income of affiliates									(4.6)	(0.2)	0.6
Equity in net income of subsidiaries									0.0	0.0	0.0
Net (loss) income									(37.6)	97.9	83.5
Total other comprehensive income (loss)									(72.2)	24.5	(26.3)
Comprehensive income (loss)									(109.8)	122.4	57.2
Assets
Accounts receivable, net	329.1				250.7				329.1	250.7
Total current assets	437.1				195.2				437.1	195.2
Unbilled Contracts Receivable					69.5					69.5
Unbilled Receivables, Current	48.6								48.6
Other current assets	17.8				5.2				17.8	5.2
Total current assets	1,041.4				677.8				1,041.4	677.8
Property, plant and equipment, net	572.8				192.4				572.8	192.4
Operating Lease, Right-of-Use Asset	27.0				0.2				27.0	0.2
Unbilled Receivable, Non Current	0.0				0.0				0.0	0.0
Pension assets	27.2				24.9				27.2	24.9
Intangible assets, net	0.0				0.0				0.0	0.0
Deferred tax asset-non-current, net	0.1				0.2				0.1	0.2
Goodwill	464.9				2.4				464.9	2.4
Other assets	128.7				116.0				128.7	116.0
Assets	2,448.3				1,013.9				2,448.3	1,013.9
Liabilities
Accounts payable	222.7				175.1				222.7	175.1
Accrued expenses	131.8				29.4				131.8	29.4
Profit sharing	6.2				7.6				6.2	7.6
Current portion of long-term debt	2.8				1.6				2.8	1.6
Operating Lease, Liability, Current	0.1				0.1				0.1	0.1
Advance payments, short-term	1.3				0.0				1.3	0.0
Billings in Excess of Cost, Current	0.8				0.0				0.8	0.0
Provision for Loss on Contracts	22.5				0.0				22.5	0.0
Deferred revenue and other deferred credits, short-term	9.5				0.3				9.5	0.3
Deferred grant income liability — current					1.0					1.0
Other current liabilities	34.4				10.5				34.4	10.5
Total current liabilities	432.1				225.6				432.1	225.6
Long-term debt	94.8				94.7				94.8	94.7
Operating Lease, Liability, Noncurrent	28.2				0.1				28.2	0.1
Advance payments, long-term	0.0				0.0				0.0	0.0
Pension/OPEB obligation	399.6				0.0				399.6	0.0
Billings in Excess of Cost, Noncurrent	1.0				0.0				1.0	0.0
Provision for Loss on Contacts, Non Current	262.4				0.0				262.4	0.0
Deferred grant income liability — non-current	19.4				19.8				19.4	19.8
Deferred revenue and other deferred credits	7.4				4.0				7.4	4.0
Deferred Tax Liabilities, Net, Noncurrent	12.3				8.3				12.3	8.3
Other non-current liabilities	337.8				6.3				337.8	6.3
Total equity	853.3				655.1				853.3	655.1
Total liabilities and equity	2,448.3				1,013.9				2,448.3	1,013.9
Operating activities
Net cash provided (used in) by operating activities									(16.2)	178.0	108.5
Investing activities
Purchase of property, plant and equipment									(24.4)	(37.0)	(22.1)
Payments to Acquire Businesses, Net of Cash Acquired									(227.6)
Other									4.9	(7.9)	0.6
Net cash used in investing activities									(247.1)	(44.9)	(21.5)
Financing activities
Proceeds from Issuance of Senior Long-term Debt									0.0	0.0	0.0
Proceeds from Lines of Credit										0.0
Proceeds from Issuance of Secured Debt									0.0
Proceeds from (Repayments of) Other Debt									0.0
Principal payments of debt									2.0	(0.7)	(0.7)
Payments on term loans									314.0	(49.4)	(75.9)
Repayments of Debt									0.0	0.0	0.0
Repayments of Unsecured Debt											0.0
Repayments of Lines of Credit									0.0	0.0
Payment, Tax Withholding, Share-based Payment Arrangement									0.0	0.0	0.0
Proceeds from Stock Plans									0.0	0.0	0.0
Proceeds from (Payments for) Other Financing Activities									0.0	0.0
Payments for Repurchase of Common Stock									0.0	0.0	0.0
Proceeds from subsidiary (payments to Parent) to pay dividends									0.0	0.3	0.0
Payments of Dividends									0.0	0.0	0.0
Net cash provided by (used in) financing activities									312.0	(50.4)	(76.6)
Effect of exchange rate changes on cash and cash equivalents									2.8	5.9	0.0
Net (decrease) increase in cash, cash equivalents, and restricted cash for the period									51.5	88.6	10.4
Intangible Assets, Net (Excluding Goodwill)	186.2				0.0				186.2	0.0
Payments of Financing Costs									0.0		0.0
Restructuring Charges									10.5
Gain (Loss) on Disposition of Property Plant Equipment									0.0
Proceeds (payments) from subsidiary for purchase of treasury stock									0.0	0.0	0.0
Subsidiary Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	1,664.5				2,193.3				1,664.5	2,193.3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,684.4				2,210.0				1,684.4	2,210.0	725.5	387.3
Restricted Cash, Current	0.3				0.3				0.3	0.3
Condensed Consolidating Statements of Operations [Abstract]
Net revenues									2,859.7	7,116.7	6,487.3
Operating costs and expenses
Cost of sales									3,339.4	6,197.0	5,541.4
Selling, general and administrative									200.9	223.3	182.6
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds									61.2		(10.0)
Research and development									32.0	47.0	37.5
Total operating costs and expenses									3,652.7	6,467.3	5,751.5
Operating income (loss)									(793.0)	649.4	735.8
Interest expense and financing fee amortization									(191.5)	(91.6)	(79.7)
Other income, net									(55.5)	0.5	0.0
Income (loss) before income taxes and equity in net income (loss) of affiliates and subsidiaries									(1,040.0)	558.3	656.1
Income tax benefit (provision)									214.2	(120.2)	(122.3)
Income (loss) before equity in net income of affiliates and subsidiaries									(825.8)	438.1	533.8
Equity in net (loss) income of affiliates									0.0	0.0	0.0
Equity in net income of subsidiaries									(33.5)	106.4	91.0
Net (loss) income									(859.3)	544.5	624.8
Total other comprehensive income (loss)									(44.9)	95.7	(68.1)
Comprehensive income (loss)									(904.2)	640.2	556.7
Assets
Accounts receivable, net	486.4				565.4				486.4	565.4
Total current assets	828.4				786.8				828.4	786.8
Unbilled Contracts Receivable					458.8					458.8
Unbilled Receivables, Current	319.8								319.8
Other current assets	318.5				93.5				318.5	93.5
Total current assets	3,617.9				4,098.1				3,617.9	4,098.1
Property, plant and equipment, net	1,666.7				1,773.0				1,666.7	1,773.0
Operating Lease, Right-of-Use Asset	36.7				41.2				36.7	41.2
Unbilled Receivable, Non Current	4.4				6.4				4.4	6.4
Pension assets	428.7				424.2				428.7	424.2
Intangible assets, net	1,040.8				838.4				1,040.8	838.4
Deferred tax asset-non-current, net	0.0				106.3				0.0	106.3
Goodwill	100.4				0.0				100.4	0.0
Other assets	140.7				147.6				140.7	147.6
Assets	7,065.3				7,436.4				7,065.3	7,436.4
Liabilities
Accounts payable	514.6				977.1				514.6	977.1
Accrued expenses	233.7				210.0				233.7	210.0
Profit sharing	50.8				76.9				50.8	76.9
Current portion of long-term debt	337.7				48.4				337.7	48.4
Operating Lease, Liability, Current	4.8				5.3				4.8	5.3
Advance payments, short-term	17.6				21.6				17.6	21.6
Billings in Excess of Cost, Current	96.8				158.3				96.8	158.3
Provision for Loss on Contracts	162.1				83.9				162.1	83.9
Deferred revenue and other deferred credits, short-term	12.7				14.5				12.7	14.5
Deferred grant income liability — current					0.5					0.5
Other current liabilities	24.0				28.8				24.0	28.8
Total current liabilities	1,454.8				1,625.3				1,454.8	1,625.3
Long-term debt	3,522.7				2,974.7				3,522.7	2,974.7
Operating Lease, Liability, Noncurrent	32.1				36.0				32.1	36.0
Advance payments, long-term	327.4				333.3				327.4	333.3
Pension/OPEB obligation	40.6				35.7				40.6	35.7
Billings in Excess of Cost, Noncurrent	371.0				356.3				371.0	356.3
Provision for Loss on Contacts, Non Current	299.0				163.5				299.0	163.5
Deferred grant income liability — non-current	8.7				9.2				8.7	9.2
Deferred revenue and other deferred credits	31.5				30.4				31.5	30.4
Deferred Tax Liabilities, Net, Noncurrent	0.7				0.0				0.7	0.0
Other non-current liabilities	199.8				190.1				199.8	190.1
Total equity	777.0				1,681.9				777.0	1,681.9
Total liabilities and equity	7,065.3				7,436.4				7,065.3	7,436.4
Operating activities
Net cash provided (used in) by operating activities									(720.1)	733.3	643.1
Investing activities
Purchase of property, plant and equipment									(92.3)	(184.0)	(230.5)
Payments to Acquire Businesses, Net of Cash Acquired									(160.9)
Other									0.5	0.2	2.3
Net cash used in investing activities									(252.7)	(183.8)	(228.2)
Financing activities
Proceeds from Issuance of Senior Long-term Debt									1,700.0	250.0	1,300.0
Proceeds from Lines of Credit										900.0
Proceeds from Issuance of Secured Debt									400.0
Proceeds from (Repayments of) Other Debt									10.0
Principal payments of debt									29.4	(12.5)	(5.8)
Payments on term loans									(325.0)	49.4	75.9
Repayments of Debt									439.7	16.6	256.3
Repayments of Unsecured Debt											300.0
Repayments of Lines of Credit									800.0	100.0
Payment, Tax Withholding, Share-based Payment Arrangement									(14.5)	(12.9)	(15.6)
Proceeds from Stock Plans									2.6	2.6	2.1
Proceeds from (Payments for) Other Financing Activities									(0.1)	0.9
Payments for Repurchase of Common Stock									0.0	0.0	0.0
Proceeds from subsidiary (payments to Parent) to pay dividends									15.4	50.1	48.0
Payments of Dividends									0.0	0.0	0.0
Net cash provided by (used in) financing activities									446.7	935.0	(76.7)
Effect of exchange rate changes on cash and cash equivalents									0.5	0.0	0.0
Net (decrease) increase in cash, cash equivalents, and restricted cash for the period									(525.6)	1,484.5	338.2
Intangible Assets, Net (Excluding Goodwill)	29.0				1.2				29.0	1.2
Payments of Financing Costs									41.9		23.2
Gain (Loss) on Disposition of Property Plant Equipment									19.2
Proceeds (payments) from subsidiary for purchase of treasury stock									0.1	(75.8)	(805.8)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0.0				0.0				0.0	0.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	0.0				0.0				0.0	0.0	0.0	0.0
Restricted Cash, Current	0.0				0.0				0.0	0.0
Condensed Consolidating Statements of Operations [Abstract]
Net revenues									281.7	455.0	441.9
Operating costs and expenses
Cost of sales									267.9	439.8	428.3
Selling, general and administrative									2.7	3.2	2.1
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds
Research and development									0.3	1.1	0.8
Total operating costs and expenses									275.9	444.1	431.2
Operating income (loss)									5.8	10.9	10.7
Interest expense and financing fee amortization									(0.1)	0.0	0.0
Other income, net									(0.2)	0.0	0.0
Income (loss) before income taxes and equity in net income (loss) of affiliates and subsidiaries									5.5	10.9	10.7
Income tax benefit (provision)									(1.4)	(2.6)	(2.5)
Income (loss) before equity in net income of affiliates and subsidiaries									4.1	8.3	8.2
Equity in net (loss) income of affiliates									0.0	0.0	0.0
Equity in net income of subsidiaries									0.0	0.0	0.0
Net (loss) income									4.1	8.3	8.2
Total other comprehensive income (loss)									0.0	0.0	0.0
Comprehensive income (loss)									4.1	8.3	8.2
Assets
Accounts receivable, net	82.7				50.5				82.7	50.5
Total current assets	156.8				136.8				156.8	136.8
Unbilled Contracts Receivable					0.0					0.0
Unbilled Receivables, Current	0.0								0.0
Other current assets	0.0				0.0				0.0	0.0
Total current assets	239.5				187.3				239.5	187.3
Property, plant and equipment, net	264.3				306.3				264.3	306.3
Operating Lease, Right-of-Use Asset	6.9				7.5				6.9	7.5
Unbilled Receivable, Non Current	0.0				0.0				0.0	0.0
Pension assets	0.0				0.0				0.0	0.0
Intangible assets, net	0.0				0.0				0.0	0.0
Deferred tax asset-non-current, net	0.0				0.0				0.0	0.0
Goodwill	0.0				0.0				0.0	0.0
Other assets	0.0				0.0				0.0	0.0
Assets	510.7				501.1				510.7	501.1
Liabilities
Accounts payable	235.1				226.3				235.1	226.3
Accrued expenses	0.4				0.8				0.4	0.8
Profit sharing	0.0				0.0				0.0	0.0
Current portion of long-term debt	0.2				0.2				0.2	0.2
Operating Lease, Liability, Current	0.6				0.6				0.6	0.6
Advance payments, short-term	0.0				0.0				0.0	0.0
Billings in Excess of Cost, Current	0.0				0.0				0.0	0.0
Provision for Loss on Contracts	0.0				0.0				0.0	0.0
Deferred revenue and other deferred credits, short-term	0.0				0.0				0.0	0.0
Deferred grant income liability — current					2.1					2.1
Other current liabilities	0.0				0.0				0.0	0.0
Total current liabilities	236.3				230.0				236.3	230.0
Long-term debt	0.6				0.9				0.6	0.9
Operating Lease, Liability, Noncurrent	6.3				6.9				6.3	6.9
Advance payments, long-term	0.0				0.0				0.0	0.0
Pension/OPEB obligation	0.0				0.0				0.0	0.0
Billings in Excess of Cost, Noncurrent	0.0				0.0				0.0	0.0
Provision for Loss on Contacts, Non Current	0.0				0.0				0.0	0.0
Deferred grant income liability — non-current	0.0				0.0				0.0	0.0
Deferred revenue and other deferred credits	0.0				0.0				0.0	0.0
Deferred Tax Liabilities, Net, Noncurrent	0.0				0.0				0.0	0.0
Other non-current liabilities	0.0				0.0				0.0	0.0
Total equity	267.5				263.3				267.5	263.3
Total liabilities and equity	510.7				501.1				510.7	501.1
Operating activities
Net cash provided (used in) by operating activities									(8.6)	11.4	18.3
Investing activities
Purchase of property, plant and equipment									(2.2)	(11.2)	(18.6)
Payments to Acquire Businesses, Net of Cash Acquired									0.0
Other									0.0	0.0	0.5
Net cash used in investing activities									(2.2)	(11.2)	(18.1)
Financing activities
Proceeds from Issuance of Senior Long-term Debt									0.0	0.0	0.0
Proceeds from Lines of Credit										0.0
Proceeds from Issuance of Secured Debt									0.0
Proceeds from (Repayments of) Other Debt									0.0
Principal payments of debt									0.2	(0.2)	(0.2)
Payments on term loans									11.0	0.0	0.0
Repayments of Debt									0.0	0.0	0.0
Repayments of Unsecured Debt											0.0
Repayments of Lines of Credit									0.0	0.0
Payment, Tax Withholding, Share-based Payment Arrangement									0.0	0.0	0.0
Proceeds from Stock Plans									0.0	0.0	0.0
Proceeds from (Payments for) Other Financing Activities									0.0	0.0
Payments for Repurchase of Common Stock									0.0	0.0	0.0
Proceeds from subsidiary (payments to Parent) to pay dividends									0.0	0.0	0.0
Payments of Dividends									0.0	0.0	0.0
Net cash provided by (used in) financing activities									10.8	(0.2)	(0.2)
Effect of exchange rate changes on cash and cash equivalents									0.0	0.0	0.0
Net (decrease) increase in cash, cash equivalents, and restricted cash for the period									0.0	0.0	0.0
Intangible Assets, Net (Excluding Goodwill)	0.0				0.0				0.0	0.0
Payments of Financing Costs									0.0		0.0
Restructuring Charges									1.3
Gain (Loss) on Disposition of Property Plant Equipment									3.7
Proceeds (payments) from subsidiary for purchase of treasury stock									0.0	0.0	0.0
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0.0				0.0				0.0	0.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	0.0				0.0				0.0	0.0	0.0	$ 0.0
Restricted Cash, Current	0.0				0.0				0.0	0.0
Condensed Consolidating Statements of Operations [Abstract]
Net revenues									(425.6)	(674.1)	(626.5)
Operating costs and expenses
Cost of sales									(425.6)	(674.1)	(626.5)
Selling, general and administrative									0.0	0.0	0.0
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds
Research and development									0.0	0.0	0.0
Total operating costs and expenses									(425.6)	(674.1)	(626.5)
Operating income (loss)									0.0	0.0	0.0
Interest expense and financing fee amortization									2.1	3.6	4.9
Other income, net									(2.1)	(3.6)	(4.9)
Income (loss) before income taxes and equity in net income (loss) of affiliates and subsidiaries									0.0	0.0	0.0
Income tax benefit (provision)									0.0	0.0	0.0
Income (loss) before equity in net income of affiliates and subsidiaries									0.0	0.0	0.0
Equity in net (loss) income of affiliates									0.0	0.2	(0.6)
Equity in net income of subsidiaries									892.8	(650.9)	(715.9)
Net (loss) income									892.8	(650.7)	(716.5)
Total other comprehensive income (loss)									117.1	(120.2)	94.4
Comprehensive income (loss)									1,009.9	(770.9)	(622.1)
Assets
Accounts receivable, net	(413.8)				(320.2)				(413.8)	(320.2)
Total current assets	0.0				0.0				0.0	0.0
Unbilled Contracts Receivable					0.0					0.0
Unbilled Receivables, Current	0.0								0.0
Other current assets	0.0				0.0				0.0	0.0
Total current assets	(413.8)				(320.2)				(413.8)	(320.2)
Property, plant and equipment, net	0.0				0.0				0.0	0.0
Operating Lease, Right-of-Use Asset	0.0				0.0				0.0	0.0
Unbilled Receivable, Non Current	0.0				0.0				0.0	0.0
Pension assets	0.0				0.0				0.0	0.0
Intangible assets, net	(1,897.7)				(2,600.3)				(1,897.7)	(2,600.3)
Deferred tax asset-non-current, net	0.0				0.0				0.0	0.0
Goodwill	0.0				0.0				0.0	0.0
Other assets	(185.8)				(186.8)				(185.8)	(186.8)
Assets	(2,497.3)				(3,107.3)				(2,497.3)	(3,107.3)
Liabilities
Accounts payable	(413.5)				(320.2)				(413.5)	(320.2)
Accrued expenses	(0.3)				0.0				(0.3)	0.0
Profit sharing	0.0				0.0				0.0	0.0
Current portion of long-term debt	0.0				0.0				0.0	0.0
Operating Lease, Liability, Current	0.0				0.0				0.0	0.0
Advance payments, short-term	0.0				0.0				0.0	0.0
Billings in Excess of Cost, Current	0.0				0.0				0.0	0.0
Provision for Loss on Contracts	0.0				0.0				0.0	0.0
Deferred revenue and other deferred credits, short-term	0.0				0.0				0.0	0.0
Deferred grant income liability — current					0.0					0.0
Other current liabilities	0.0				0.0				0.0	0.0
Total current liabilities	(413.8)				(320.2)				(413.8)	(320.2)
Long-term debt	(85.2)				(86.2)				(85.2)	(86.2)
Operating Lease, Liability, Noncurrent	0.0				0.0				0.0	0.0
Advance payments, long-term	0.0				0.0				0.0	0.0
Pension/OPEB obligation	0.0				0.0				0.0	0.0
Billings in Excess of Cost, Noncurrent	0.0				0.0				0.0	0.0
Provision for Loss on Contacts, Non Current	0.0				0.0				0.0	0.0
Deferred grant income liability — non-current	0.0				0.0				0.0	0.0
Deferred revenue and other deferred credits	0.0				0.0				0.0	0.0
Deferred Tax Liabilities, Net, Noncurrent	0.0				0.0				0.0	0.0
Other non-current liabilities	(100.6)				(100.6)				(100.6)	(100.6)
Total equity	(1,897.7)				(2,600.3)				(1,897.7)	(2,600.3)
Total liabilities and equity	(2,497.3)				(3,107.3)				(2,497.3)	(3,107.3)
Operating activities
Net cash provided (used in) by operating activities										0.0	0.0
Investing activities
Purchase of property, plant and equipment									0.0	0.0	0.0
Payments to Acquire Businesses, Net of Cash Acquired									0.0
Other									0.0	0.0	0.0
Net cash used in investing activities									0.0	0.0	0.0
Financing activities
Proceeds from Issuance of Senior Long-term Debt									0.0	0.0	0.0
Proceeds from Lines of Credit										0.0
Proceeds from Issuance of Secured Debt									0.0
Proceeds from (Repayments of) Other Debt									0.0
Principal payments of debt									0.0	0.0	0.0
Payments on term loans									0.0	0.0	0.0
Repayments of Debt									0.0	0.0	0.0
Repayments of Unsecured Debt											0.0
Repayments of Lines of Credit									0.0	0.0
Payment, Tax Withholding, Share-based Payment Arrangement										0.0	0.0
Proceeds from Stock Plans									0.0	0.0	0.0
Proceeds from (Payments for) Other Financing Activities									0.0	0.0
Payments for Repurchase of Common Stock									0.0	0.0	0.0
Proceeds from subsidiary (payments to Parent) to pay dividends									0.0	0.0	0.0
Payments of Dividends									0.0	0.0	0.0
Net cash provided by (used in) financing activities									0.0	0.0	0.0
Effect of exchange rate changes on cash and cash equivalents									0.0	0.0	0.0
Net (decrease) increase in cash, cash equivalents, and restricted cash for the period									0.0	0.0	0.0
Intangible Assets, Net (Excluding Goodwill)	$ 0.0				$ 0.0				0.0	0.0
Payments of Financing Costs									0.0		0.0
Restructuring Charges									0.0
Gain (Loss) on Disposition of Property Plant Equipment									0.0
Proceeds (payments) from subsidiary for purchase of treasury stock									$ 0.0	$ 0.0	$ 0.0