STATEMENTS OF CONSOLIDATED INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Revenue	$ 55,438	$ 54,127	$ 53,105
Operating Expenses:
Compensation and benefits	28,557	33,102	27,575
Repairs and maintenance	1,240	1,228	1,286
Depreciation and amortization	1,867	1,858	1,782
Purchased transportation	7,486	7,354	7,232
Fuel	4,027	4,090	4,046
Other occupancy	950	902	943
Other expenses	4,277	4,250	4,161
Total Operating Expenses	48,404	52,784	47,025
Operating Profit	7,034	1,343	6,080
Other Income and (Expense):
Investment income	20	24	44
Interest expense	(380)	(393)	(348)
Total Other Income and (Expense)	(360)	(369)	(304)
Income Before Income Taxes	6,674	974	5,776
Income Tax Expense	2,302	167	1,972
Net Income	$ 4,372	$ 807	$ 3,804
Basic Earnings Per Share (in dollars per share)	$ 4.65	$ 0.84	$ 3.88
Diluted Earnings Per Share (in dollars per share)	$ 4.61	$ 0.83	$ 3.84