Valuation and Qualifying Accounts (Schedule) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 01, 2012	Jan. 02, 2011	Jan. 03, 2010
Reserve for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of Period	$ 2.9	$ 2.3	$ 2.7
Charged to cost and Expenses	0.7	1.4	0.4
Acquisition	0.6
Deduction and other (a)	(0.4)	(0.8)	(0.8)
Balance at end of period	3.8	2.9	2.3
Environmental Reserves [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of Period	5.2	3.0	2.7
Charged to cost and Expenses	0.1	0.3	1.1
Acquisition	0.6	2.4
Deduction and other (a)	(2.7)	(0.5)	(0.8)
Balance at end of period	$ 3.2	$ 5.2	$ 3.0