Earnings per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended
	Apr. 30, 2013	Mar. 30, 2014	Mar. 31, 2013
Net income:
Continuing operations		$ 14.1	$ 16.3
Discontinued operations			(0.2)
NET INCOME		14.1	16.1
Shares
Shares		35,400,000	35,500,000
Per Share Amount
Continuing operations (in dollars per share)		$ 0.40	$ 0.46
Discontinued operations (in dollars per share)			$ (0.01)
NET INCOME (in dollars per share)		$ 0.40	$ 0.45
Dilutive securities, principally common stock options
Common stock equivalents (in shares)		100,000	100,000
Net Income
Continuing operations		14.1	16.3
(Loss) income from discontinued operations, net of tax			(0.2)
Net income		14.1	16.1
Weighted average number of shares:
Weighted average number of shares		35,500,000	35,600,000
Per Share Amount
Continuing operations (in dollars per share)		$ 0.40	$ 0.46
Discontinued operations (in dollars per share)			$ (0.01)
Net income (in dollars per share)		$ 0.40	$ 0.45
Securities not included in the computation of diluted EPS
Options to purchase shares of Class A common stock		300,000	400,000
Number of shares of the entity's Class A common stock authorized to be repurchased	90
Number of shares of Class A common stock repurchased		161,000
Cost of shares of Class A common stock repurchased		$ 9.4