EARNINGS (LOSS) PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 31, 2010	Oct. 02, 2010	Jul. 03, 2010	Apr. 03, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
EARNINGS (LOSS) PER SHARE [Abstract]
Net Income (Loss)									$ 51.5	$ 54.4	$ (86.3)
Less: income attributable to noncontrolling interest									0.8	0.6	0.3
Income (loss) attributable to Jones	(20.9)	41.2	5.4	25.9	(40.0)	29.2	25.8	39.4	50.7	53.8	(86.6)
Less: income (loss) allocated to participating securities									1.5	2.4	(3.6)
Income (loss) available to common stockholders of Jones									$ 49.2	$ 51.4	$ (83.0)
Weighted-average common shares outstanding - basic									79.6	82.1	81.7
Effect of dilutive employee stock options									1.7	0.5	0
Weighted-average common shares and share equivalents outstanding - diluted									81.3	82.6	81.7
Earnings (loss) per share [Abstract]
Basic	$ (0.27)	$ 0.50	$ 0.06	$ 0.30	$ (0.47)	$ 0.34	$ 0.30	$ 0.46	$ 0.62	$ 0.63	$ (1.02)
Diluted	$ (0.27)	$ 0.49	$ 0.06	$ 0.30	$ (0.47)	$ 0.34	$ 0.30	$ 0.45	$ 0.61	$ 0.62	$ (1.02)