EARNINGS PER SHARE (Computation of Basic and Diluted Earnings Per Common Share) (Detail) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Numerator:
Earnings from continuing operations																	$ 144.1		$ 171.7		$ 75.7
Earnings from discontinued operations, net of tax																	9.7		1.8		99.2
Net earnings attributable to Cytec Industries Inc.	$ (29.3)		$ 53.6		$ 73.6		$ 55.9		$ 59.4		$ 43.8		$ 34.6		$ 35.6		$ 153.8	[1]	$ 173.5	[1]	$ 174.9
Denominator:
Weighted average shares outstanding																	72,155		78,839		92,067
Diluted average shares outstanding																	73,375		80,368		93,573
Basic earnings per common share:
Basic EPS from continuing operations (in usd per share)																	$ 2.00		$ 2.18		$ 0.82
Basic EPS from discontinued operations (in usd per share)																	$ 0.13		$ 0.02		$ 1.08
Net earnings per common share attributable to Cytec Industries Inc.	$ (0.41)	[2]	$ 0.74	[2]	$ 1.02	[2]	$ 0.78	[2]	$ 0.83	[2]	$ 0.60	[2]	$ 0.42	[2]	$ 0.40	[2]	$ 2.13	[1],[2]	$ 2.20	[1],[2]	$ 1.90
Diluted earnings per common share:
Diluted EPS from continuing operations (in usd per share)																	$ 1.96		$ 2.14		$ 0.81
Diluted EPS from discontinued operations (in usd per share)																	$ 0.13		$ 0.02		$ 1.06
Net earnings per common share attributable to Cytec Industries Inc.	$ (0.41)	[2]	$ 0.73	[2]	$ 1.00	[2]	$ 0.76	[2]	$ 0.81	[2]	$ 0.59	[2]	$ 0.42	[2]	$ 0.39	[2]	$ 2.09	[1],[2]	$ 2.16	[1],[2]	$ 1.87
Options And Stock-settled SARS Activity
Denominator:
Effect of dilutive shares:																	1,015		1,308		1,247
Non Vested Stock And Stock Units
Denominator:
Effect of dilutive shares:																	205		221		259

[1] The sum of the quarters’ financial results may not equal financial results for the full year due to rounding.

[2] The sum of the quarters may not equal the full year basic and diluted net earnings per share since each period is calculated separately.