Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating revenues:
Freight revenues	$ 5,068	$ 5,661	$ 10,319	$ 10,947
Other revenues	361	354	724	706
Total operating revenues	5,429	6,015	11,043	11,653
Operating expenses:
Compensation and benefits	1,305	1,246	2,674	2,500
Purchased services and materials	600	636	1,243	1,243
Fuel	541	923	1,105	1,844
Depreciation	497	470	988	934
Equipment and other rents	312	316	623	628
Other	225	228	484	454
Total operating expenses	3,480	3,819	7,117	7,603
Operating income	1,949	2,196	3,926	4,050
Other income (Note 6)	142	22	168	60
Interest expense	(153)	(138)	(301)	(271)
Income before income taxes	1,938	2,080	3,793	3,839
Income taxes	(734)	(789)	(1,438)	(1,460)
Net income	$ 1,204	$ 1,291	$ 2,355	$ 2,379
Share and Per Share (Note 8):
Earnings per share - basic	$ 1.38	$ 1.43	$ 2.69	$ 2.63
Earnings per share - diluted	$ 1.38	$ 1.43	$ 2.68	$ 2.62
Weighted average number of shares - basic	872.2	901.5	875.8	904.8
Weighted average number of shares - diluted	875.2	905.0	879.0	908.7
Dividends declared per share	$ 0.55	$ 0.455	$ 1.10	$ 0.91