Business Segment Information (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Sales:
Sales	$ 2,032.6	$ 1,748.0	$ 5,929.9	$ 5,160.7
Intersegment Sales:
Intersegment sales	31.1	18.6	84.4	50.8
Operating Income:
Operating income	351.5	261.1	954.7	757.4
Actuation and Landing Systems [Member]
Sales:
Sales	733.0	631.1	2,154.0	1,852.3
Intersegment Sales:
Intersegment sales	14.8	8.1	39.6	22.9
Operating Income:
Operating income	97.1	79.5	260.1	209.4
Nacelles and Interior Systems [Member]
Sales:
Sales	705.1	582.7	2,050.3	1,715.9
Intersegment Sales:
Intersegment sales	2.8	2.5	8.8	7.2
Operating Income:
Operating income	191.1	136.8	526.6	407.0
Electronic Systems [Member]
Sales:
Sales	594.5	534.2	1,725.6	1,592.5
Intersegment Sales:
Intersegment sales	13.5	8.0	36.0	20.7
Operating Income:
Operating income	104.7	86.3	285.5	252.2
Reportable Segment [Member]
Operating Income:
Operating income	392.9	302.6	1,072.2	868.6
Unallocated Amount to Segment [Member]
Operating Income:
ERP costs	(4.1)	(3.6)	(12.6)	(11.7)
Corporate Elimination [Member]
Operating Income:
Corporate general and administrative expenses	$ (37.3)	$ (37.9)	$ (104.9)	$ (99.5)

Enterprise resource planning costs.

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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

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- Definition

Amount of revenue from transactions with other operating segments of the same entity.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 27

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

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