Earnings per Share (Details) (USD $) In Millions, except Share data	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2011	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Income (loss) (Numerator)
Net income from continuing operations		$ 23.6	$ 17.3	$ 47.6	$ 51.7
Income (loss) from discontinued operations, net of taxes		0.1		1.8	(4.2)
NET INCOME		23.7	17.3	49.4	47.5
Shares (Denominator)
Weighted average number of shares		37,400,000	37,300,000	37,500,000	37,200,000
Basic Per Share Amount
Continuing operations (in dollars per share)		$ 0.63	$ 0.46	$ 1.27	$ 1.39
Discontinued operations (in dollars per share)				$ 0.05	$ (0.11)
NET INCOME (in dollars per share)		$ 0.63	$ 0.46	$ 1.32	$ 1.28
Effect of dilutive securities
Common stock equivalents (in shares)		100,000	200,000	200,000	200,000
Income (loss) (Numerator)
Continuing operations		23.6	17.3	47.6	51.7
Discontinued operations		0.1		1.8	(4.2)
NET INCOME		23.7	17.3	49.4	47.5
Shares (Denominator)
Weighted average number of shares		37,500,000	37,500,000	37,700,000	37,400,000
Diluted Per Share Amount
Continuing operations (in dollars per share)		$ 0.63	$ 0.46	$ 1.26	$ 1.38
Discontinued operations (in dollars per share)				$ 0.05	$ (0.11)
NET INCOME (in dollars per share)		$ 0.63	$ 0.46	$ 1.31	$ 1.27
Securities not included in the computation of diluted EPS
Options to purchase shares of Class A Common Stock (in shares)		800,000	600,000	500,000	600,000
Number of shares of Class A common stock repurchased	1,000,000
Cost of Class A common stock repurchased	$ 27.2