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Property, Equipment and Intangible Assets(Tables) | 12 Months Ended
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Dec. 31, 2017
Property, Equipment and Intangible Assets [Abstract] |
Property, Equipment and Intangible Assets |
﻿ |  |  |  |  |  |
﻿ |  | December 31,
﻿ |  | 2017 |  | 2016
﻿ |  |  |  |  |  |
﻿ |  | (in millions)
﻿Leasehold improvements |  | $ | 7 |  | $ | 6
﻿Computer equipment |  |  | 17 |  |  | 14
﻿Office furniture and equipment |  |  | 2 |  |  | 2
﻿ |  |  | 26 |  |  | 22
﻿Less - accumulated depreciation and amortization |  |  | (12) |  |  | (9)
﻿Property and equipment, net |  |  | 14 |  |  | 13
﻿ |  |  |  |  |  |
﻿Internally developed software |  |  | 52 |  |  | 49
﻿Intangible assets (acquired technology) |  |  | 8 |  |  | 7
﻿Less - accumulated amortization |  |  | (31) |  |  | (28)
﻿Intangible assets, net |  |  | 29 |  |  | 28
﻿Total property, equipment, and intangible assets, net |  | $ | 43 |  | $ | 41
﻿

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- Definition Tabular disclosure of property and equipment less accumulated depreciation. + References No definition available. + Details
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- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration