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Deferred Contract Costs
 12 Months Ended
Dec. 31, 2019
Capitalized Contract Cost [Abstract]  
Deferred Contract Costs Deferred Contract Costs

Origination and fulfillment costs from contracts with customers capitalized as of December 31, 2019 and 2018 consists of the following (in millions):
 
2019
 
2018
Contract costs on implementations in progress
$
138

 
$
93

Contract origination costs on completed implementations, net
352

 
219

Contract fulfillment costs on completed implementations, net
177

 
163

Total Deferred contract costs, net
$
667

 
$
475



For the years ended December 31, 2019, 2018 and 2017, amortization of deferred contract costs on completed implementations was $184 million, $123 million and $102 million.