Accounts Payable And Other Current Liabilities (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended		3 Months Ended
	Mar. 30, 2015	Jan. 02, 2015	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Accounts Payable and Other Current Liabilities Details [Abstract]
Accounts payable			$ 882		$ 877
Income and other taxes payable			675		412
Accrued wages and vacation			421		409
Accrued casualty costs			208		249
Interest payable			133		178
Equipment rents payable			101		100
Dividends payable				407	438	[1]
Other			554		640
Total accounts payable and other current liabilities			2,974		3,303
Dividends paid	$ 484	$ 438	$ 922	$ 363

[1] Beginning in 2015, the timing of the dividend declaration and payable dates was aligned to occur within the same quarter. The 2015 dividends paid amount includes the fourth quarter 2014 dividend of $438 million, which was paid on January 2, 2015, as well as the first quarter 2015 dividend of $484 million, which was paid on March 30, 2015.