Equity-Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Jul. 01, 2011	Jul. 01, 2011	Jul. 01, 2011 Performance Stock Shares [Member]		Jul. 02, 2010 Performance Stock Shares [Member]	Jul. 01, 2011 Restricted Stock [Member]	Jul. 02, 2010 Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based grants vesting period in years, minimum		one
Equity-based grants vesting period in years, maximum		four
Vesting period for a majority of equity-based compensation awards granted in years		three
Number of shares for equity-based compensation grants approved by shareholders	53,889,977	53,889,977
Number of shares for equity-based compensation approved by shareholders available for grant	18,872,031	18,872,031
Contractual term of stock options and stock appreciation rights, years		10
Aggregate intrinsic value of exercised stock options	$ 0.3
Unrecognized equity-based compensation cost	43.0	43.0
Weighted average period for equity-based compensation recognition, years		1.9
Weighted average fair value of stock options granted		$ 2.07
Fair market value of restricted stock vested						10.9
Weighted average grant date fair value			$ 5.58	[1]		$ 5.37	$ 8.78
Performance stock units granted			1,640,832		1,132,220
Weighted average fair value of performance stock units granted during period			$ 5.40		$ 7.73
Results of 2010 operating earnings strategic goal target			$ 237.0
Additional shares granted for performance stock units for performance greater than 100 percent of targets			183,737
Percentage of performance stock units earned			125.00%
Shares earned per performance stock unit			1.25
Number of common shares vested and issued for performance stock units granted in 2010			306,155

[1] This includes the additional 183,737 shares from the 2010 grant that were earned based on 2010 operating earnings and strategic goals.