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Accrued claims recoverable.

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Amount paid to merchant customers, net of amounts recovered from check writers.

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Check guarantee losses, net of anticipated recoveries.

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Fair Value, Aggregate Differences, Long-term Debt Instruments

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Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) shares in Millions		12 Months Ended
	Oct. 13, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2017	Sep. 30, 2015	Dec. 31, 2013
Summary of Significant Accounting Policies (Textuals) [Abstract]
Deposit for performance guarantees		$ 0	$ 5,000,000
Cash and cash equivalents		683,000,000	682,000,000	$ 493,000,000			$ 548,000,000
Fair value of long-term debt		$ 183,000,000	30,000,000
Senior notes	$ 4,500,000,000
Interest expense recognition period		10 years
Unbilled receivables, current		$ 41,000,000
Accrued claims payable		9,000,000	11,000,000
Accrued claims recoverable		12,000,000	13,000,000
Check guarantee losses, net of anticipated recoveries excluding service fees		40,000,000	49,000,000	57,000,000
Amount paid to merchant customers, net of amounts recovered from check writers		$ 32,000,000	$ 41,000,000	$ 52,000,000
Purchase of common shares, shares		3	4	4
Sales Revenue, Net [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Concentration risk		10.00%	10.00%	10.00%
Sales Revenue, Net [Member] \| Geographic Concentration Risk [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Concentration risk		24.00%	22.00%	22.00%
Sales Revenue, Net [Member] \| Product Concentration Risk [Member] \| Processing Services [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Concentration risk		67.00%	75.00%	75.00%
Sales Revenue, Net [Member] \| Product Concentration Risk [Member] \| Professional Services [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Concentration risk		15.00%	14.00%	15.00%
Sales Revenue, Net [Member] \| Product Concentration Risk [Member] \| Software Licensing [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Concentration risk		16.00%	9.00%	7.00%
Sales Revenue, Net [Member] \| Product Concentration Risk [Member] \| Hardware and Other Miscellaneous [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Concentration risk		2.00%	2.00%	3.00%
Sales Revenue, Net, Software Licenses [Member] \| Product Concentration Risk [Member] \| Professional Services [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Concentration risk		60.00%
Software [Member] \| Minimum [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Estimated useful life		5 years
Software [Member] \| Maximum [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Estimated useful life		10 years
Building [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Estimated useful life		30 years
Furniture and Fixtures [Member] \| Minimum [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Estimated useful life		3 years
Furniture fixture and computer equipment [Member] \| Maximum [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Estimated useful life		7 years
Customer Relationships [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Expected customer attrition period		10 years
Customer Relationships [Member] \| Minimum [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Intangible assets, estimated useful lives		5 years
Customer Relationships [Member] \| Maximum [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Intangible assets, estimated useful lives		10 years
Software [Member] \| Minimum [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Intangible assets, estimated useful lives		3 years
Software [Member] \| Maximum [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Intangible assets, estimated useful lives		10 years
Foreign Exchange Contract [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Notional amount		$ 143,000,000	$ 81,000,000
Foreign Entities [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Cash and cash equivalents		470,000,000
Scenario, Forecast [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Unbilled receivables, current					$ 23,000,000
Cash Flow Hedging [Member] \| Treasury Lock Hedge [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Notional amount						$ 1,000,000,000.0
Contract settlement payment	$ 16,000,000
Interest expense recognition period	10 years
Cash Flow Hedging [Member] \| India, Rupees \| Foreign Exchange Forward [Member]
Summary of Significant Accounting Policies (Textuals) [Abstract]
Notional amount		7,000,000
Derivative fair value		$ 1,000,000