Segment Information (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net sales to external customers:
Net sales to external customers	$ 351.8	$ 294.5	$ 1,037.1	$ 862.6
Other operating (income) expense	2.7		(3.0)	3.5
Total sales	351.8	294.5	1,037.1	862.6
Operating income	46.0	34.5	142.6	98.8
Depreciation and amortization	13.7	13.7	41.6	39.3
Stock-based compensation expense	2.5	2.2	11.3	10.5
Accrual basis additions to capital expenditures	49.2	10.4	104.3	24.1
Other operating (income) expense
Unrecognized service credits as a curtailment gain in U.K. plan			5.7
Environmental remediation expense	2.7	2.1	7.5	6.8
Composite Materials
Net sales to external customers:
Net sales to external customers	262.4	224.6	795.5	663.9
Other operating (income) expense			(5.7)
Intersegment sales	14.6	9.8	42.4	30.2
Total sales	277.0	234.4	837.9	694.1
Operating income	45.1	34.3	143.4	107.6
Depreciation and amortization	12.5	12.6	38.2	36.2
Stock-based compensation expense	0.9	0.8	3.4	3.5
Accrual basis additions to capital expenditures	46.5	9.6	99.2	22.6
Other operating (income) expense
Unrecognized service credits as a curtailment gain in U.K. plan			5.7
Composite Materials | Commercial aerospace
Net sales to external customers:
Net sales to external customers	138.4	110.3	432.5	333.5
Composite Materials | Space and defense
Net sales to external customers:
Net sales to external customers	60.7	52.6	183.1	166.4
Composite Materials | Industrial
Net sales to external customers:
Net sales to external customers	63.3	61.7	179.9	164.0
Engineered Products
Net sales to external customers:
Net sales to external customers	89.4	69.9	241.6	198.7
Intersegment sales	0.3		0.8	0.3
Total sales	89.7	69.9	242.4	199.0
Operating income	16.2	11.9	40.6	33.9
Depreciation and amortization	1.1	1.0	3.2	2.9
Stock-based compensation expense	0.5	0.1	0.9	0.6
Accrual basis additions to capital expenditures	2.2	0.8	4.6	1.4
Engineered Products | Commercial aerospace
Net sales to external customers:
Net sales to external customers	69.0	47.3	180.3	137.1
Engineered Products | Space and defense
Net sales to external customers:
Net sales to external customers	20.2	21.8	59.2	59.9
Engineered Products | Industrial
Net sales to external customers:
Net sales to external customers	0.2	0.8	2.1	1.7
Corporate and Other
Net sales to external customers:
Other operating (income) expense	2.7		2.7	3.5
Intersegment sales	(14.9)	(9.8)	(43.2)	(30.5)
Total sales	(14.9)	(9.8)	(43.2)	(30.5)
Operating income	(15.3)	(11.7)	(41.4)	(42.7)
Depreciation and amortization	0.1	0.1	0.2	0.2
Stock-based compensation expense	1.1	1.3	7.0	6.4
Accrual basis additions to capital expenditures	0.5		0.5	0.1
Other operating (income) expense
Environmental remediation expense	2.7		2.7	3.5
Commercial aerospace
Net sales to external customers:
Net sales to external customers	207.4	157.6	612.8	470.6
Space and defense
Net sales to external customers:
Net sales to external customers	80.9	74.4	242.3	226.3
Industrial
Net sales to external customers:
Net sales to external customers	$ 63.5	$ 62.5	$ 182.0	$ 165.7