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Deferred Contract Costs (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
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Capitalized Contract Cost |  |
Deferred contract costs, net | $ 538 | $ 475
Contract costs on implementations in progress |  |
Capitalized Contract Cost |  |
Deferred contract costs, net | 82 | 93
Incremental contract origination costs on completed implementations, net |  |
Capitalized Contract Cost |  |
Deferred contract costs, net | 279 | 219
Contract fulfillment costs on completed implementations, net |  |
Capitalized Contract Cost |  |
Deferred contract costs, net | $ 177 | $ 163

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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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