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Changes in Estimates Changes in Estimates (Tables)
 9 Months Ended
Sep. 28, 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
 
For the Nine Months Ended
Changes in Estimates
 
September 28, 2017
 
September 29, 2016
 
September 28, 2017
 
September 29, 2016
(Unfavorable) Favorable Cumulative Catch-up Adjustment by Segment
 
 
 
 
 
 
 
 
Fuselage Systems
 
$
(2.4
)
 
$
(1.9
)
 
$
5.3

 
$
15.1

Propulsion Systems
 
2.4

 
(1.6
)
 
4.3

 
(1.8
)
Wing Systems
 
(2.8
)
 
(0.8
)
 
19.1

 
18.7

Total (Unfavorable) Favorable Cumulative Catch-up Adjustment
 
$
(2.8
)
 
$
(4.3
)
 
$
28.7

 
$
32.0

 
 
 
 
 
 
 
 
 
(Forward Loss) and Changes in Estimates on Loss Programs by Segment
 
 
 
 
 
 
 
 
Fuselage Systems
 
$
(0.9
)
 
$
(1.6
)
 
$
(238.5
)
 
$
(133.0
)
Propulsion Systems
 
1.3

 
(0.5
)
 
(46.7
)
 
6.0

Wing Systems
 
(2.4
)
 
0.9

 
(74.4
)
 
5.1

Total Forward Loss
 
$
(2.0
)
 
$
(1.2
)
 
$
(359.6
)
 
$
(121.9
)
 
 
 
 
 
 
 
 
 
Total Change in Estimate
 
$
(4.8
)
 
$
(5.5
)
 
$
(330.9
)
 
$
(89.9
)
EPS Impact (diluted per share based upon statutory rates)
 
$
(0.03
)
 
$
(0.03
)
 
$
(1.75
)
 
$
(0.44
)