Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 26, 2009	Dec. 25, 2010	Dec. 27, 2008
Income Taxes [Line Items]
Federal income tax rate	35.00%
Deferred tax liabilities	$ 529,000,000
Reduction of liability for installment gain	14,000,000
Timber notes receivable maturity period	2020
Deferred tax asset related to federal income tax, net operating loss carryforwards	104,000,000
Operating loss carryforwards maturity period	2020
Minimum alternative tax credit carryforwards	188,000,000
Deferred tax assets related to various state net operating losses	26,000,000
Valuation allowance	25,500,000		14,700,000
Total unrecognized tax benefits	21,172,000	8,247,000	20,863,000	20,380,000
Unrecognized tax benefits that, if recognized would impact effective tax rate	7,000,000
Decrease in unrecognized benefits		14,900,000
Accrued interest and penalties	1,000,000
Timberland Assets [Member]
Income Taxes [Line Items]
Deferred tax liabilities	$ 543,000,000
Maximum [Member]
Income Taxes [Line Items]
Valuation allowance maturity period	2029
Minimum [Member]
Income Taxes [Line Items]
Valuation allowance maturity period	2012