OPERATIONS BY SEGMENT AND GEOGRAPHIC AREAS AND IDENTIFIABLE ASSETS (Selected Information In Relation To Continuing Operations) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 30, 2012	Dec. 31, 2013 segment	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Number of Reportable Segments									4
Net sales	$ 479.9	$ 463.9	$ 513.8	$ 477.4	$ 470.7	$ 455.4	$ 404.0	$ 378.1	$ 1,935.0	$ 1,708.1	$ 1,415.9
Revenue from Related Parties									(1.8)	(0.8)	(0.9)
Earnings from operations									309.4	132.2	107.8
Total Assets	2,680.5				3,924.2				2,680.5	3,924.2	3,543.5
Aerospace Materials
Segment Reporting Information [Line Items]
Net sales									960.8	877.1	722.6
Revenue from Related Parties									1.5	0	0
Total net sales									962.3	877.1	722.6
Earnings from operations									177.6	168.5	124.9
Percentage of sales									18.50%	19.20%	17.30%
Total Assets	1,136.7				1,014.6				1,136.7	1,014.6	870.8
Capital expenditures	144.8				68.5				144.8	68.5	34.5
Depreciation and amortization									26.0	26.3	20.0
Industrial Materials
Segment Reporting Information [Line Items]
Net sales									316.3	176.4	66.6
Revenue from Related Parties									0	0	0
Total net sales									316.3	176.4	66.6
Earnings from operations									19.0	11.4	11.9
Percentage of sales									6.00%	6.50%	17.90%
Total Assets	483.5				520.4				483.5	520.4	45.9
Capital expenditures	4.9				5.1				4.9	5.1	1.5
Depreciation and amortization									17.6	8.4	0.9
In-Process Separation
Segment Reporting Information [Line Items]
Net sales									382.7	384.2	339.5
Revenue from Related Parties									0	0	0
Total net sales									382.7	384.2	339.5
Earnings from operations									86.5	95.3	73.0
Percentage of sales									22.60%	24.80%	21.50%
Total Assets	445.0				369.1				445.0	369.1	310.8
Capital expenditures	109.8				60.4				109.8	60.4	17.6
Depreciation and amortization									15.3	16.9	14.4
Additive Technologies
Segment Reporting Information [Line Items]
Net sales									275.2	270.4	287.2
Revenue from Related Parties									0.3	0.8	0.9
Total net sales									275.5	271.2	288.1
Earnings from operations									39.6	40.8	41.9
Percentage of sales									14.40%	15.00%	14.50%
Total Assets	211.1				206.8				211.1	206.8	202.2
Capital expenditures	12.4				11.1				12.4	11.1	16.1
Depreciation and amortization									11.8	13.6	11.2
Operating Segments
Segment Reporting Information [Line Items]
Net sales									1,935.0	1,708.1	1,415.9
Revenue from Related Parties									1.8	0.8	0.9
Total net sales									1,936.8	1,708.9	1,416.8
Earnings from operations									322.7	316.0	251.7
Percentage of sales									16.70%	18.50%	17.80%
Total Assets	2,276.3				2,110.9				2,276.3	2,110.9	1,429.7
Capital expenditures	271.9				145.1				271.9	145.1	69.7
Depreciation and amortization									$ 70.7	$ 65.2	$ 46.5