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Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Restatement to prior year income Prior year amounts were also revised as follows to conform to the 2019 presentation.
 
 
Year Ended December 31, 2018
 
 
As Reported(1)
 
Change
 
As Revised
Sales
 
$
3,805

 
$
(351
)
 
$
3,454

Services, maintenance and rentals
 
5,589

 
351

 
5,940

 
 
 
 
 
 
 
Cost of sales
 
$
2,305

 
$
(117
)
 
$
2,188

Cost of services, maintenance and rentals
 
3,356

 
117

 
3,473

 
 
Year Ended December 31, 2017
 
 
As Reported(1)
 
Change
 
As Revised
Sales
 
$
3,801

 
$
(389
)
 
$
3,412

Services, maintenance and rentals
 
5,896

 
389

 
6,285

 
 
 
 
 
 
 
Cost of sales
 
$
2,273

 
$
(140
)
 
$
2,133

Cost of services, maintenance and rentals
 
3,514

 
140

 
3,654

_____________
(1)
As reported amounts have been restated to reflect the sale of our investment of XIP. Refer to Note 7 - Divestitures for additional information.