Property and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2017

Property and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property and equipment, net (in millions), and the corresponding ranges of estimated useful lives were as follows:

							2017
	December 31, 2017			December 31, 2016			Range of Estimated Useful Life
Land for transportation purposes	$	6,088		$	6,063		—
Track structure	23,217			22,287			15 – 50 years
Other roadway	28,103			25,990			9 – 100 years
Locomotives	8,528			8,338			7 – 35 years
Freight cars and other equipment	2,940			2,755			8 – 41 years
Computer hardware, software and other	1,075			982			6 – 15 years
Construction in progress	989			965			—
Total cost	70,940			67,380
Less accumulated depreciation and amortization	(8,627		)	(6,130		)
Property and equipment, net	$	62,313		$	61,250