Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Significant Accounting Estimates

The following table summarizes certain recurring-type costs and expenses that require management estimates for the three years ended December 31, 2017:

	Year Ended December 31,
Expense/(Income)	2017		2016		2015
Provisions for restructuring and related costs	$	220	$	264	$	27
Provision for receivables	46		43		54
Provisions for obsolete and excess inventory	27		28		30
Provision for product warranty liability	15		15		22
Depreciation and obsolescence of equipment on operating leases	265		276		286
Depreciation of buildings and equipment	136		148		151
Amortization of internal use software	65		73		83
Amortization of product software	4		4		4
Amortization of acquired intangible assets	53		58		60
Amortization of customer contract costs	4		4		6
Defined pension benefits - net periodic benefit cost	194		127		141
Retiree health benefits - net periodic benefit cost	30		35		2
Income tax expense	481		62		193