CONSOLIDATED INCOME STATEMENTS (Unaudited) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jul. 01, 2011
Jun. 25, 2010
Jul. 01, 2011
Jun. 25, 2010
Income Statement        
Revenue $ 3,019 $ 2,663 $ 5,829 $ 5,154
Expense        
Labor and Fringe 764 721 1,529 1,450
Materials, Supplies and Other 557 551 1,087 1,070
Fuel 431 304 833 587
Depreciation 246 230 489 458
Equipment and Other Rents 95 89 192 189
Total Expense 2,093 1,895 4,130 3,754
Operating Income 926 768 1,699 1,400
Interest Expense (134) (135) (274) (277)
Other Income - Net (Note 8) 0 9 5 20
Earnings Before Income Taxes 792 642 1,430 1,143
Income Tax Expense (Note 9) (286) (228) (529) (424)
Net Earnings $ 506 $ 414 $ 901 $ 719
Per Common Share (Note 2)        
Net Earnings Per Share, Basic $ 0.46 [1] $ 0.36 [1] $ 0.81 [1] $ 0.62 [1]
Net Earnings Per Share, Assuming Dilution $ 0.46 [1] $ 0.36 [1] $ 0.81 [1] $ 0.61 [1]
Average Shares Outstanding 1,102,409 [1] 1,149,492 [1] 1,105,228 [1] 1,161,365 [1]
Average Shares Outstanding, Assuming Dilution 1,109,015 [1] 1,159,173 [1] 1,111,886 [1] 1,171,071 [1]
Cash Dividends Paid Per Common Share $ 0.12 $ 0.08 $ 0.21 $ 0.16
[1] All share and per share data were retroactively restated to reflect the stock split effective May 31, 2011.