CONSOLIDATED INCOME STATEMENTS (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Revenue	$ 11,756	$ 11,743	$ 10,636
Expense
Labor and Fringe	3,020	3,073	2,957
Materials, Supplies and Other	2,156	2,229	2,075
Fuel	1,672	1,668	1,212
Depreciation	1,059	976	947
Equipment and Other Rents	392	379	374
Total Expense	8,299	8,325	7,565
Operating Income	3,457	3,418	3,071
Interest Expense	(566)	(552)	(557)
Other Income - Net (Note 10)	73	22	32
Earnings Before Income Taxes	2,964	2,888	2,546
Income Tax Expense (Note 11)	(1,105)	(1,066)	(983)
Net Earnings	$ 1,859	$ 1,822	$ 1,563
Net Earnings Per Share, Basic
Net Earnings (in dollars per share)	$ 1.79	$ 1.68	$ 1.37
Net Earnings Per Common Share, Assuming Dilution
Net Earnings (in dollars per share)	$ 1.79	$ 1.67	$ 1.35
Average Common Shares Outstanding	1,038	1,083	1,143
Average Common Shares Outstanding, Assuming Dilution	1,040	1,089	1,154
Cash Dividends Paid Per Common Share	$ 0.54	$ 0.45	$ 0.33