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

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other intangible assets
Weighted-average useful life of other amortizable assets	14 years	14 years
Total amortization expense related to other intangible assets	$ 237	$ 62	$ 41
Future estimated amortization expense related to amortizable other identifiable intangible assets
2013	240
2014	224
2015	223
2016	217
2017	$ 214
Customer relationships
Other intangible assets
Weighted-average useful life of other amortizable assets	15 years
Trademarks
Other intangible assets
Weighted-average useful life of other amortizable assets	16 years
Patents
Other intangible assets
Weighted-average useful life of other amortizable assets	14 years
Other technology
Other intangible assets
Weighted-average useful life of other amortizable assets	8 years