Inventories Other Significant Inventory (Details) (USD $) In Millions, unless otherwise specified	Sep. 28, 2012	Dec. 31, 2011
SH-2G(A) Super Seasprite Program [Member]
Inventory for Long-term Contracts or Programs, Gross	$ 52.6	$ 52.7
K-MAX® [Member]
Inventory for Long-term Contracts or Programs, Gross	$ 18.1	$ 20.3

Amount before progress payments and reserves of inventories associated with long-term contracts or programs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Subparagraph a, d

-Article 5

Reference 2: 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),(d))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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