Property, plant and equipment and assets held for lease

6 Months Ended

Jun. 30, 2017

Property, Plant and Equipment [Abstract]

Property, plant and equipment and assets held for lease

Note 12. Property, plant and equipment and assets held for lease

A summary of property, plant and equipment of our insurance and other businesses follows (in millions).

	Ranges of  estimated useful life		June 30,  2017			December 31,  2016
Land		—	$	2,213		$	2,108
Buildings and improvements		5 – 40 years		8,538			8,360
Machinery and equipment		3 – 25 years		21,220			20,463
Furniture, fixtures and other		2 – 15 years		4,395			4,080
				36,366			35,011
Accumulated depreciation				(16,576	)		(15,686	)
			$	19,790		$	19,325

A summary of property, plant and equipment of our railroad and our utilities and energy businesses follows (in millions).

	Ranges of   estimated useful life		June 30,  2017		December 31,  2016
Railroad:
Land		—	$	6,074	$	6,063
Track structure and other roadway		7 – 100 years		50,344		48,277
Locomotives, freight cars and other equipment		6 – 41 years		12,264		12,075
Construction in progress		—		896		965
				69,578		67,380
Accumulated depreciation				(7,936)		(6,130)
				61,642		61,250
Utilities and energy:
Utility generation, transmission and distribution systems		5 – 80 years		72,317		71,536
Interstate natural gas pipeline assets		3 – 80 years		6,969		6,942
Independent power plants and other assets		3 – 30 years		7,044		6,596
Construction in progress		—		2,607		2,098
				88,937		87,172
Accumulated depreciation				(25,251)		(24,663)
				63,686		62,509
			$	125,328	$	123,759

The utility generation, transmission and distribution systems and interstate natural gas pipeline assets are owned by regulated public utility and natural gas pipeline subsidiaries.

Assets held for lease and property, plant and equipment of our finance and financial products businesses are summarized below (in millions).

	Ranges of estimated useful life		June 30,  2017			December 31,  2016
Assets held for lease		5 – 35 years	$	12,110		$	11,902
Land		—		226			224
Buildings, machinery and other		3 – 50 years		1,365			1,302
				13,701			13,428
Accumulated depreciation				(3,910	)		(3,739	)
			$	9,791		$	9,689

A summary of depreciation expense follows (in millions).

	First Six Months
	2017		2016
Insurance and other	$	1,089	$	1,037
Railroad, utilities and energy		2,389		2,298
Finance and financial products		321		308
	$	3,799	$	3,643