Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended
Apr. 02, 2020	Mar. 28, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 42.6	$ 0.0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	31.5
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	11.1
Payments for Restructuring	1.2
Restructuring Costs	9.9
Fuselage Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	30.1
Propulsion Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	8.8
Wing Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 3.7

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 17
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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