Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 years	Jan. 01, 2011	Jan. 02, 2010
Property, Plant and Equipment [Line Items]
Percentage of inventories determined using the last-in, first-out (LIFO) method	45.00%	46.00%
FIFO LIFO valuation difference	$ 57.0	$ 58.3
Estimated useful lives, minimum	3
Estimated useful lives, maximum	40
Commitments for purchases of property, plant, and equipment	$ 13.3
Shares excluded from the calculation of the effect of dilutive securities	0.7	0.3	0
Dilutive effect of convertible notes into shares of common stock		0.3	1.3
Long-term rate of return on plan assets	8.25%	8.25%	8.25%
Minimum [Member]
Property, Plant and Equipment [Line Items]
Discount rate for defined benefit pension plans	4.40%	5.15%
Maximum [Member]
Property, Plant and Equipment [Line Items]
Discount rate for defined benefit pension plans	5.30%	5.93%