Business Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Sales:
Total Sales	$ 2,152.6	$ 1,895.9
Intersegment Sales:
Total Intersegment Sales	22.7	23.5
Segment Operating Income:
Total Operating Income	323.7	300.3
Actuation and Landing Systems [Member]
Sales:
Total Sales	802.5	684.3
Intersegment Sales:
Total Intersegment Sales	11.2	9.8
Segment Operating Income:
Total Operating Income	97.0	86.5
Nacelles and Interior Systems [Member]
Sales:
Total Sales	757.4	656.4
Intersegment Sales:
Total Intersegment Sales	3.1	2.8
Segment Operating Income:
Total Operating Income	176.0	157.3
Electronic Systems [Member]
Sales:
Total Sales	592.7	555.2
Intersegment Sales:
Total Intersegment Sales	8.4	10.9
Segment Operating Income:
Total Operating Income	88.1	91.0
Reportable Segment [Member]
Segment Operating Income:
Total Operating Income	361.1	334.8
Unallocated Amount to Segment [Member]
Segment Operating Income:
ERP costs	(4.9)	(3.6)
Corporate Elimination [Member]
Segment Operating Income:
Corporate general and administrative expenses	$ (32.5)	$ (30.9)