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Segment Information - (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) country	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) country	Sep. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Acquisition, integration and severance costs	$ 22	$ 39	$ 141	$ 181
Global Financial Solutions
Segment Reporting Information [Line Items]
Number of countries we operate in (more than) | country	130		130
Acquisition, integration and severance costs	$ 0	0	$ 0	0
SunGard
Segment Reporting Information [Line Items]
Acquisition, integration and severance costs	22		141
Recent acquisitions
Segment Reporting Information [Line Items]
Acquisition, integration and severance costs		39		181
Geographic distribution, foreign
Segment Reporting Information [Line Items]
Long-term assets, excluding goodwill and other intangible assets	$ 515	$ 527	$ 515	$ 527

X

- Definition

Long-term Assets, Excluding Goodwill and Other Intangible Assets.

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- Definition

Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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- Definition

The number of countries in which the entity operates as of balance sheet date.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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