EARNINGS PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Earnings Per Share [Abstract]
Net income	$ 8.4	$ 5.4	$ 7.4	$ 31.2
Less: income attributable to noncontrolling interest	0.3	0.2	0.5	0.4
Income attributable to Jones	8.1	5.2	6.9	30.8
Less: income allocated to participating securities	0.2	0.2	0	0.8
Income available to common stockholders of Jones	$ 7.9	$ 5.0	$ 6.9	$ 30.0
Weighted-average shares outstanding - basic	75.2	81.7	75.7	81.9
Effect of dilutive employee restricted stock	0.8	1.5	1.8	1.4
Weighted-average shares outstanding - diluted	76.0	83.2	77.5	83.3
Earnings per common share attributable to Jones
Basic	$ 0.11	$ 0.06	$ 0.09	$ 0.37
Diluted	$ 0.10	$ 0.06	$ 0.09	$ 0.36