Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Operating activities
Net income	$ 323us-gaap_ProfitLoss	$ 274us-gaap_ProfitLoss
Less: income from discontinued operations, net of tax	0	(13)
Income from continuing operations	323	261
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	89us-gaap_DepreciationAndAmortization	80us-gaap_DepreciationAndAmortization
Stock-based compensation	24us-gaap_ShareBasedCompensation	20us-gaap_ShareBasedCompensation
Deferred taxes	(24)us-gaap_DeferredIncomeTaxExpenseBenefit	(15)us-gaap_DeferredIncomeTaxExpenseBenefit
Amortization of increase in fair market value of NYSE Notes	(12)	(14)
Other	(15)us-gaap_OtherNoncashIncomeExpense	(10)us-gaap_OtherNoncashIncomeExpense
Changes in assets and liabilities:
Customer accounts receivable	(122)	(49)
Prepaid expenses and other current assets	(26)	(11)
Income taxes payable	(45)	(13)
Deferred revenue	312	293
Other current and non-current liabilities	(39)	(5)
Total adjustments	142	276
Net cash provided by operating activities from continuing operations	465	537
Investing activities
Capital expenditures	(39)	(25)
Capitalized software development costs	(21)us-gaap_PaymentsToDevelopSoftware	(20)us-gaap_PaymentsToDevelopSoftware
Cash paid for acquisitions, net of cash acquired	0	(142)
Cash paid for equity method investment	(60)	0
Proceeds from sales of available-for-sale investments	0	10
Purchases of available-for-sale investments	0	(6)
Increase in restricted cash and investments	34	(60)
Net cash used in investing activities from continuing operations	(86)	(243)
Financing activities
Repayments of debt	(35)us-gaap_RepaymentsOfDebt	161us-gaap_RepaymentsOfDebt
Dividends to shareholders	(73)us-gaap_PaymentsOfDividendsCommonStock	(76)us-gaap_PaymentsOfDividendsCommonStock
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises	(36)	(36)
Proceeds from exercise of common stock options	4	2
Repurchases of common stock	(196)	0
Distributions of profits to non-controlling interest	(15)us-gaap_PaymentsToMinorityShareholders	(9)us-gaap_PaymentsToMinorityShareholders
Other	13	14
Net cash used in financing activities from continuing operations	(268)	(266)
Cash Provided by (Used in) Operating Activities, Discontinued Operations	0	(18)
Cash Provided by (Used in) Investing Activities, Discontinued Operations	0	(6)
Effect of exchange rate changes on cash and cash equivalents	(11)	(1)
Net increase (decrease) in cash and cash equivalents	100	3
Cash and cash equivalents, beginning of period	652	961
Cash and cash equivalents, end of period	752	964
Supplemental cash flow disclosure
Cash paid for income taxes	51us-gaap_IncomeTaxesPaid	46us-gaap_IncomeTaxesPaid
Cash paid for interest	$ 1us-gaap_InterestPaid	$ 5us-gaap_InterestPaid

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The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

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- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

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- Definition

The cash outflow associated with the development or modification of software programs or applications for internal use (that is, not to be sold, leased or otherwise marketed to others) that qualify for capitalization.

+ References

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- Definition

Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest.

+ References

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- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 11

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-Section 50

-Paragraph 2

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4K

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (a),(c)

-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4J

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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