Inventories and Equipment on Operating Leases, Net

The following is a summary of Inventories by major category:



	December 31,
	2013		2012
Finished goods	$	837	$	844
Work-in-process	60		61
Raw materials	101		106
Total Inventories	$	998	$	1,011

The transfer of equipment from our inventories to equipment subject to an operating lease is presented in our Consolidated Statements of Cash Flows in the operating activities section. Equipment on operating leases and similar arrangements consists of our equipment rented to customers and depreciated to estimated salvage value at the end of the lease term.

Equipment on operating leases and the related accumulated depreciation were as follows:



	December 31,
	2013			2012
Equipment on operating leases	$	1,575		$	1,533
Accumulated depreciation	(1,016		)	(998		)
Equipment on Operating Leases, Net	$	559		$	535

Depreciable lives generally vary from three to four years consistent with our planned and historical usage of the equipment subject to operating leases. Our equipment operating lease terms vary, generally from one to three years. Scheduled minimum future rental revenues on operating leases with original terms of one year or longer are:



2014		2015		2016		2017		2018		Thereafter
$	331	$	275	$	181	$	95	$	41	$	14

Total contingent rentals on operating leases, consisting principally of usage charges in excess of minimum contracted amounts, for the years ended December 31, 2013, 2012 and 2011 amounted to $151, $158 and $154, respectively.