Inventories and Equipment on Operating Leases, Net

The following is a summary of Inventories by major category:



	December 31,
	2015		2014
Finished goods	$	792	$	778
Work-in-process	51		58
Raw materials	99		98
Total Inventories	$	942	$	934

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,
	2015			2014
Equipment on operating leases	$	1,478		$	1,531
Accumulated depreciation	(983		)	(1,006		)
Equipment on Operating Leases, Net	$	495		$	525

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:



2016		2017		2018		2019		2020		Thereafter
$	331	$	228	$	144	$	78	$	30	$	3

Total contingent rentals on operating leases, consisting principally of usage charges in excess of minimum contracted amounts, for the years ended December 31, 2015, 2014 and 2013 amounted to $139, $149 and $151, respectively.