Inventories - Other Significant Inventory (Details) - USD ($) $ in Millions	Apr. 01, 2016	Dec. 31, 2015
K-MAX® [Member]
Inventory, Noncurrent	$ 15.0	$ 14.9
SH 2GA Super Seasprite Program [Member]
Inventory, Gross	8.6	$ 9.0
SH 2 inventory
Inventory, Noncurrent	$ 4.8

Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_InventoryGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant