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Deferred Contract Costs
12 Months Ended
Dec. 31, 2018
Capitalized Contract Cost [Abstract]  
Deferred Contract Costs
Deferred Contract Costs

Origination and fulfillment costs from contracts with customers capitalized as of December 31, 2018 and 2017 consists of the following (in millions):
 
2018
 
2017
Contract costs on implementations in progress
$
93

 
$
104

Incremental contract origination costs on completed implementations, net
219

 
127

Contract fulfillment costs on completed implementations, net
163

 
123

Total deferred contract costs, net
$
475

 
$
354



For the years ended December 31, 2018, 2017 and 2016, amortization of deferred contract costs on completed amortizations was $123 million, $102 million and $71 million.