Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating revenues:
Freight revenues	$ 5,215	$ 5,819	$ 15,534	$ 16,766
Other revenues	347	363	1,071	1,069
Total operating revenues	5,562	6,182	16,605	17,835
Operating expenses:
Compensation and benefits	1,267	1,287	3,941	3,787
Purchased services and materials	589	650	1,832	1,893
Fuel	484	882	1,589	2,726
Depreciation	507	481	1,495	1,415
Equipment and other rents	302	310	925	938
Other	205	242	689	696
Total operating expenses	3,354	3,852	10,471	11,455
Operating income	2,208	2,330	6,134	6,380
Other income (Note 6)	30	20	198	80
Interest expense	(157)	(144)	(458)	(415)
Income before income taxes	2,081	2,206	5,874	6,045
Income taxes	(781)	(836)	(2,219)	(2,296)
Net income	$ 1,300	$ 1,370	$ 3,655	$ 3,749
Share and Per Share (Note 8):
Earnings per share - basic	$ 1.51	$ 1.53	$ 4.19	$ 4.16
Earnings per share - diluted	$ 1.50	$ 1.53	$ 4.18	$ 4.14
Weighted average number of shares - basic	862.9	893.2	871.5	900.9
Weighted average number of shares - diluted	865.8	896.9	874.6	904.8
Dividends declared per share	$ 0.55	$ 0.50	$ 1.65	$ 1.41