EARNINGS PER SHARE (EPS) (Computation Of Basic And Diluted Earnings Per Common Share) (Detail) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share Basic And Diluted [Line Items]
Earnings from continuing operations	$ 62.5	$ 62.6	$ 118.4	$ 71.4
Earnings (loss) from discontinued operations, net of tax	11.1	(28.0)	11.1	(1.1)
Net earnings attributable to Cytec Industries Inc.	$ 73.6	$ 34.6	$ 129.5	$ 70.3
Weighted average shares outstanding	36,153	40,826	36,050	42,910
Diluted average shares outstanding	36,766	41,577	36,708	43,703
Basic EPS from continuing operations	$ 1.73	$ 1.53	$ 3.28	$ 1.66
Basic EPS from discontinued operations	$ 0.31	$ (0.68)	$ 0.31	$ (0.02)
Basic earnings per common share attributable to Cytec Industries Inc.	$ 2.04	$ 0.85	$ 3.59	$ 1.64
Diluted EPS from continuing operations	$ 1.70	$ 1.51	$ 3.23	$ 1.63
Diluted EPS from discontinued operations	$ 0.30	$ (0.68)	$ 0.30	$ (0.02)
Diluted earnings per common share attributable to Cytec Industries Inc.	$ 2.00	$ 0.83	$ 3.53	$ 1.61
Options And Stock-Settled SARS
Earnings Per Share Basic And Diluted [Line Items]
Nonvested shares and units	508	652	548	686
Non-Vested Shares And Units
Earnings Per Share Basic And Diluted [Line Items]
Nonvested shares and units	105	99	110	107