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Deferred Tax Liabilities and Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 25, 2011
Dec. 26, 2010
Liabilities    
Accelerated depreciation $ 295,391 $ 309,477
Accelerated amortization of deductible intangibles 121,679 59,709
Other 29,890 27,600
Total deferred tax liabilities 446,960 396,786
Assets    
Accrued compensation costs 97,532 98,005
Pension 346,000 239,120
Postretirement medical and life 71,674 75,607
Federal tax benefits of uncertain state tax positions 43,631 46,856
Partnership investments including impairments 52,344 65,874
Other 67,200 62,963
Total deferred tax assets 678,381 588,425
Total net deferred tax assets 231,421 191,639
Net current deferred tax assets 22,771 21,254
Net long-term deferred tax assets $ 208,650 $ 170,385