Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net sales to external customers:
Net sales to external customers	$ 416.5	$ 400.1
Total sales	416.5	400.1
Operating income (loss)	63.0	60.6
Depreciation and amortization	14.3	14.0
Stock-based compensation expense	8.7	7.5
Accrual basis additions to capital expenditures	41.4	44.7
Commercial aerospace
Net sales to external customers:
Net sales to external customers	268.9	242.3
Space and defense
Net sales to external customers:
Net sales to external customers	96.0	84.9
Industrial
Net sales to external customers:
Net sales to external customers	51.6	72.9
Composite Materials
Net sales to external customers:
Net sales to external customers	324.8	316.2
Intersegment sales	16.7	15.9
Total sales	341.5	332.1
Operating income (loss)	67.9	65.8
Depreciation and amortization	13.1	12.9
Stock-based compensation expense	2.0	2.1
Accrual basis additions to capital expenditures	38.4	43.6
Composite Materials | Commercial aerospace
Net sales to external customers:
Net sales to external customers	201.7	179.5
Composite Materials | Space and defense
Net sales to external customers:
Net sales to external customers	72.8	63.9
Composite Materials | Industrial
Net sales to external customers:
Net sales to external customers	50.3	72.8
Engineered Products
Net sales to external customers:
Net sales to external customers	91.7	83.9
Intersegment sales	0.6	0.1
Total sales	92.3	84.0
Operating income (loss)	13.4	11.8
Depreciation and amortization	1.2	1.1
Stock-based compensation expense	0.5	0.4
Accrual basis additions to capital expenditures	3.0	1.1
Engineered Products | Commercial aerospace
Net sales to external customers:
Net sales to external customers	67.2	62.8
Engineered Products | Space and defense
Net sales to external customers:
Net sales to external customers	23.2	21.0
Engineered Products | Industrial
Net sales to external customers:
Net sales to external customers	1.3	0.1
Corporate and Other
Net sales to external customers:
Intersegment sales	(17.3)	(16.0)
Total sales	(17.3)	(16.0)
Operating income (loss)	(18.3)	(17.0)
Stock-based compensation expense	$ 6.2	$ 5.0