Income Taxes - Net Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012
Deferred tax assets
Retirement, postemployment and deferred compensation plans	$ 251,082	$ 387,202
Accruals for other employee benefits, compensation, insurance and other	35,596	36,959
Accounts receivable allowances	1,478	6,111
Net operating losses	57,885	49,476
Other	63,821	64,884
Gross deferred tax assets	409,862	544,632
Valuation allowance	(42,295)	(42,138)
Net deferred tax assets	367,567	502,494
Deferred tax liabilities
Property, plant and equipment	75,661	108,763
Intangible assets	11,902	0
Investments in joint ventures	19,625	13,430
Other	14,531	19,875
Gross deferred tax liabilities	121,719	142,068
Net deferred tax asset	245,848	360,426
Deferred tax asset – current	65,859	58,214
Deferred tax asset – long-term	$ 179,989	$ 302,212
Valuation allowance, period for recoverability measurement	3 years