Equity Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended											3 Months Ended	12 Months Ended
	Dec. 28, 2012 Y	Dec. 30, 2011	Dec. 31, 2010	Dec. 28, 2012 Restricted Stock	Dec. 30, 2011 Restricted Stock	Dec. 31, 2010 Restricted Stock	Dec. 28, 2012 Performance stock units	Dec. 30, 2011 Performance stock units	Dec. 31, 2010 Performance stock units	Dec. 28, 2012 Performance stock units Awards granted during 2011	Dec. 30, 2011 Performance stock units Awards granted during 2011	Mar. 30, 2011 Performance stock units Awards granted during 2010	Dec. 28, 2012 Performance stock units Awards granted during 2010	Dec. 31, 2010 Performance stock units Awards granted during 2010	Dec. 28, 2012 Performance stock units Awards Granted during Twenty Twelve [Member]	Dec. 28, 2012 Minimum	Dec. 28, 2012 Maximum	Dec. 28, 2012 Majority
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based grants vesting period																1 year	3 years	3 years
Stock and Stock Appreciation Rights Expiration (in years)	10
Number of shares for equity-based compensation grants approved by shareholders	53,889,977
Number of shares for equity-based compensation approved by shareholders available for grant	19,207,529
Aggregate intrinsic value of exercised stock options	$ 0.5	$ 1.5	$ 4.5
Weighted average fair value of stock options granted	$ 1.29	$ 2.00	$ 2.97
Fair market value of restricted stock vested				9.2	11.4	16.9
Equity-based compensation granted, grant date weighted average fair value				$ 3.83	$ 5.29	$ 8.68	$ 3.98				$ 5.39			$ 7.72	$ 3.98
Performance stock units granted							1,963,478	1,660,290	1,145,723
Shares issued for each PSU granted, maximum							2
Shares anticipated to be issued for each PSU granted							1.0
Percentage of performance stock units earned										50.00%			125.00%
Shares earned per performance stock unit										0.50			1.25
Number of common shares vested and issued for performance stock units										99,420		306,155	293,236
Results of operating earnings strategic goal target														237.0
Additional shares per Performance stock granted												183,737
Unrecognized equity-based compensation cost	$ 14.9
Weighted average period for equity-based compensation recognition, years	1 year 8 months 12 days