Income Taxes (Schedule of Deferred Tax Assets And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Income Taxes [Abstract]
Inventories	$ 24.2	$ 21.2	$ 20.8
Accruals not currently deductible	73.4	67.5	45.8
Valuation allowance	(5.6)	(3.2)
Other			(0.8)
Total current (included in deferred income tax assets and other accrued liabilities)	92.0	85.5	65.8
Employee benefits	133.9	109.2	113.9
Net operating losses	52.2	46.9	44.9
Depreciation and amortization	(150.4)	(126.0)	(110.3)
SOC securitizations	(1.4)	(6.8)	(28.1)
Valuation allowance	(34.8)	(36.9)	(33.7)
Equity-based compensation	14.8	9.2	4.3
Other	2.8	1.5	(0.6)
Total long term	17.1	(2.9)	(9.6)
Net deferred income tax asset	$ 109.1	$ 82.6	$ 56.2