Pension and Postretirement Benefit Plans Asset Allocation (Details) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013		Dec. 29, 2012
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	100.00%		100.00%
Cash
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	12.00%		1.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	30.00%		31.00%
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	58.00%		68.00%
Pension Plans | Total
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 243,153		$ 151,236
Pension Plans | Total | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28,671		1,942
Pension Plans | Total | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	72,919		46,293
Pension Plans | Total | U.S. small-cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16,566	[1]	7,877	[1]
Pension Plans | Total | U.S mid-cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16,233	[2]	10,509	[2]
Pension Plans | Total | Global equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	37,697	[3]	25,483
Pension Plans | Total | Emerging markets (d)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,423	[4]	2,424	[4]
Pension Plans | Total | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	140,333		103,001
Pension Plans | Total | U.S. fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	43,069	[5]	4,121
Pension Plans | Total | Foreign fixed income funds (f)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97,264	[6]	98,880	[7]
Pension Plans | Total | 524292 Third Party Administration of Insurance and Pension Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,230
Pension Plans | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	61,879		13,869
Pension Plans | Level 1 | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28,671		1,942
Pension Plans | Level 1 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22,178		7,806
Pension Plans | Level 1 | U.S. small-cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,023	[1]	6,190	[1]
Pension Plans | Level 1 | U.S mid-cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,993	[2]	522	[2]
Pension Plans | Level 1 | Global equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,079	[3]	0
Pension Plans | Level 1 | Emerging markets (d)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,083	[4]	1,094	[4]
Pension Plans | Level 1 | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,030		4,121
Pension Plans | Level 1 | U.S. fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,030	[5]	4,121
Pension Plans | Level 1 | Foreign fixed income funds (f)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	[6]	0	[7]
Pension Plans | Level 1 | 524292 Third Party Administration of Insurance and Pension Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Pension Plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	175,337		137,367
Pension Plans | Level 2 | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Pension Plans | Level 2 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	50,741		38,487
Pension Plans | Level 2 | U.S. small-cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,543	[1]	1,687	[1]
Pension Plans | Level 2 | U.S mid-cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,240	[2]	9,987	[2]
Pension Plans | Level 2 | Global equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	32,618	[3]	25,483
Pension Plans | Level 2 | Emerging markets (d)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,340	[4]	1,330	[4]
Pension Plans | Level 2 | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	124,596		98,880
Pension Plans | Level 2 | U.S. fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27,332	[5]	0
Pension Plans | Level 2 | Foreign fixed income funds (f)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97,264	[6]	98,880	[7]
Pension Plans | Level 2 | 524292 Third Party Administration of Insurance and Pension Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Pension Plans | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,937		0
Pension Plans | Level 3 | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Pension Plans | Level 3 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Pension Plans | Level 3 | U.S. small-cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	[1]	0	[1]
Pension Plans | Level 3 | U.S mid-cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	[2]	0	[2]
Pension Plans | Level 3 | Global equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	[3]	0
Pension Plans | Level 3 | Emerging markets (d)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	[4]	0	[4]
Pension Plans | Level 3 | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,707		0
Pension Plans | Level 3 | U.S. fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,707	[5]	0
Pension Plans | Level 3 | Foreign fixed income funds (f)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	[6]	0	[7]
Pension Plans | Level 3 | 524292 Third Party Administration of Insurance and Pension Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,230

[1] This category consists of commingled and registered mutual funds that focus on equity securities of U.S companies. It includes both indexed and actively managed funds.

[2] This category consists of commingled and registered mutual funds that focus on equity securities of companies outside of the U.S. It includes both indexed and actively managed funds.

[3] This category consists of commingled and registered mutual funds that invest in equity securities of both U.S. and foreign companies. It includes actively managed funds

[4] This category consists of commingled and registered mutual funds that invest in equity securities of companies in emerging market economies. It includes actively managed funds.

[5] This category consists of actively managed funds that invest in investment-grade bonds of U.S. issuers from diverse industries and U.S. government bonds and treasury notes.

[6] This category consists of funds that invest in investment-grade bonds of foreign companies and Euro region government bonds.

[7] This category consists of funds that invest in investment-grade bonds of foreign companies and Euro region government bonds