Property, Plant and Equipment, Net

9 Months Ended

Sep. 30, 2015

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment, Net.

Property, plant and equipment, net consists of the following:



	Useful Life	September 30, 2015			December 31, 2014
	(in years)	(in millions)
Land		$	628		$	489
Buildings and improvements	4 - 40	2,566			2,353
Machinery, equipment and furniture	1 - 40	5,978			5,594
Assets leased to others	15 - 39	3,948			3,546
Construction in progress		707			584
		13,827			12,566
Less: Accumulated depreciation and amortization		(3,996		)	(3,611		)
Property, plant and equipment, net		$	9,831		$	8,955

Assets leased to others are related to our Railcar and Real Estate segments. Included in assets leased to others in the table above are our Railcar segment's railcars for lease in the amount of approximately $3.5 billion and $3.1 billion as of September 30, 2015 and December 31, 2014, respectively. Additionally, included in assets leased to others in the table above are our Real Estate segment's properties on lease in the amount of $426 million and $450 million as of September 30, 2015 and December 31, 2014, respectively. Aggregate accumulated depreciation pertaining to assets leased to others is $1,025 million and $957 million as of September 30, 2015 and December 31, 2014, respectively.

Depreciation and amortization expense related to property, plant and equipment for the three months ended September 30, 2015 and 2014 was $192 million and $180 million, respectively, and for the nine months ended September 30, 2015 and 2014 was $560 million and $522 million, respectively.