Goodwill and Intangible Assets (Schedules for Amortization Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Finite Lived Intangible Assets
Amortization expense for acquired intangible assets	$ 60	$ 59	$ 176	$ 176
Expected amortization expense for acquired intangible assets recorded as of balance sheet date
Remainder of 2012	58		58
2013	225		225
2014	201		201
2015	188		188
2016	175		175
2017	160		160
After 2017	$ 717		$ 717

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Accounting Standards Codification

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