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Goodwill and Purchased Intangible Assets (Estimated Future Amortization Expense) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
2013	$ 38	[1]
2014	48
2015	47
2016	46
2017	43
2018 and thereafter	411
Total	$ 633
[1] Represents the estimated amortization to be recognized for the remaining nine months of 2013.Intangible Asset Impairment ChargesIn the first quarter of 2013, we recorded non-cash intangible asset impairment charges totaling $10 million related to certain acquired intangible assets associated with customer relationships ($7 million) and a certain trade name ($3 million). These impairments resulted primarily from changes in the forecasted revenues associated with the acquired customer list of FTEN, Inc., or FTEN. The fair value of customer relationships was determined using the income approach, specifically the multi-period excess earnings method. The fair value of the trade name was determined using the income approach, specifically the relief from royalty method. These charges are recorded in asset impairment charges in the Condensed Consolidated Statements of Income. These impairment charges related to our Market Services segment. However, for segment reporting purposes, these charges were allocated to corporate items based on the decision that these charges should not be used to evaluate the segment’s operating performance.

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Excluding the impact of foreign currency translation adjustment.

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Amount of amortization expense expected to be recognized after the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of amortization expense expected to be recognized in the remainder of the fiscal year following the latest fiscal year ended for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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