Multiemployer Pension And Postretirement Plans (Multiemplyer Pension Plans Trust Funds) (Details) (Multiemployer Pension Plans Defined Benefit [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Jan. 01, 2011		Jan. 02, 2010
Multiemployer Plans [Line Items]
Contributions by the Company	$ 12.6		$ 11.6		$ 11.7
Bakery and Confectionary Union and Industry International Pension Fund [Member]
Multiemployer Plans [Line Items]
Employee Identification and Pension Plan Number	52-6118572 / 001
Pension Protection Act zone status	Green		Yellow
Plan year end date for Pension Protection Act zone status	2010-12-31		2009-12-31
Contributions by the Company	4.3	[1]	3.8	[1]	3.8	[1]
Surcharge imposed	No
CBA earliest expiration date	2012-06-30
CBA latest expiration date	2016-11-01
Percentage of the Company's participants in a multiemployer pension plan who are covered by a single CBA	70.00%
Expiration date for single CBA	2013-05-05
Central States, Southeast and Southwest Areas Pension Fund [Member]
Multiemployer Plans [Line Items]
Employee Identification and Pension Plan Number	36-6044243 / 001
Pension Protection Act zone status	Red		Red
Plan year end date for Pension Protection Act zone status	2011-12-31		2010-12-31
Financial improvement plan or rehabilitation plan status pending / implemented	Implemented
Contributions by the Company	4.1	[2]	3.6	[2]	3.6	[2]
Surcharge imposed	Yes
CBA earliest expiration date	2012-01-31
CBA latest expiration date	2014-10-31
Percentage of the Company's participants in a multiemployer pension plan who are covered by a single CBA	40.00%
Expiration date for single CBA	2014-07-27
Western Conference of Teamsters Pension Trust [Member]
Multiemployer Plans [Line Items]
Employee Identification and Pension Plan Number	91-6145047 / 001
Pension Protection Act zone status	Green		Green
Plan year end date for Pension Protection Act zone status	2010-12-31		2009-12-31
Contributions by the Company	1.2	[3]	1.2	[3]	1.1	[3]
Surcharge imposed	No
CBA earliest expiration date	2012-01-31
CBA latest expiration date	2013-03-29
Percentage of the Company's participants in a multiemployer pension plan who are covered by a single CBA	40.00%
Expiration date for single CBA	2012-03-24
Philadelphia Bakery Employers and Food Driver Salesmen's Union, Local 463 and the Teamsters Union Local 676 Pension Fund [Member]
Multiemployer Plans [Line Items]
Employee Identification and Pension Plan Number	23-6537145 / 001
Pension Protection Act zone status	Green		Yellow
Plan year end date for Pension Protection Act zone status	2011-07-31		2010-07-31
Contributions by the Company	0	[4]	0.3	[4]	0.4	[4]
Hagerstown Motor Carriers and Teamsters Pension Fund [Member]
Multiemployer Plans [Line Items]
Employee Identification and Pension Plan Number	52-6045424 / 001
Pension Protection Act zone status	Red		Red
Plan year end date for Pension Protection Act zone status	2012-06-30		2011-06-30
Financial improvement plan or rehabilitation plan status pending / implemented	Implemented
Contributions by the Company	0.4		0.3		0.3
Surcharge imposed	No
CBA latest expiration date	2015-10-03
Twin Cities Bakery Drivers Pension Plan [Member]
Multiemployer Plans [Line Items]
Employee Identification and Pension Plan Number	41-6172265 / 001
Pension Protection Act zone status	Red		Red
Plan year end date for Pension Protection Act zone status	2011-12-31		2010-12-31
Financial improvement plan or rehabilitation plan status pending / implemented	Implemented
Contributions by the Company	0.2		0.2		0.2
Surcharge imposed	Yes
CBA latest expiration date	2012-05-31
Other Plans [Member]
Multiemployer Plans [Line Items]
Contributions by the Company	$ 2.4		$ 2.2		$ 2.3

[1] The Company is party to multiple CBAs requiring contributions to this fund, each with its own expiration date. Over 70 percent of the Company's participants in this fund are covered by a single CBA that expires on 5/5/2013.

[2] The Company is party to multiple CBAs requiring contributions to this fund, each with its own expiration date. Over 40 percent of the Company's participants in this fund are covered by a single CBA that expires on 7/27/2014.

[3] The Company is party to multiple CBAs requiring contributions to this fund, each with its own expiration date. Over 40 percent of the Company's participants in this fund are covered by a single CBA that expires on 3/24/2012.

[4] Effective in November 2010, the Company ceased participation in the plan and accordingly made no contributions in 2011.