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Intangible Assets, Net | 3 Months Ended
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Mar. 31, 2012
Intangible Assets, Net (Excluding Goodwill) [Abstract] |
Intangible Assets, Net | Intangible Assets, net The following table summarizes the components of Intangible assets, net (dollars in millions):
| March 31, 2012 |  | December 31, 2011
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Technology and intellectual property |  | $ | 7,763 |  |  | $ | 5,393 |  |  | $ | 2,370 |  |  | $ | 7,751 |  |  | $ | 5,081 |  |  | $ | 2,670 |
Brands |  | 5,440 |  |  | 414 |  |  | 5,026 |  |  | 5,410 |  |  | 374 |  |  | 5,036 |
Dealer network and customer relationships |  | 2,169 |  |  | 354 |  |  | 1,815 |  |  | 2,138 |  |  | 322 |  |  | 1,816 |
Favorable contracts |  | 519 |  |  | 220 |  |  | 299 |  |  | 514 |  |  | 200 |  |  | 314 |
Other |  | 17 |  |  | 15 |  |  | 2 |  |  | 17 |  |  | 14 |  |  | 3 |
Total amortizing intangible assets |  | 15,908 |  |  | 6,396 |  |  | 9,512 |  |  | 15,830 |  |  | 5,991 |  |  | 9,839 |
Non amortizing in process research and development |  | 175 |  |  |  |  |  | 175 |  |  | 175 |  |  |  |  |  | 175 |
Total intangible assets |  | $ | 16,083 |  |  | $ | 6,396 |  |  | $ | 9,687 |  |  | $ | 16,005 |  |  | $ | 5,991 |  |  | $ | 10,014 |
Amortization expense related to intangible assets was $398 million and $503 million in the three months ended March 31, 2012 and 2011. The following table summarizes estimated amortization expense related to intangible assets in each of the next five years (dollars in millions):
| Estimated Amortization Expense
2013 | $ | 1,229 |
2014 | $ | 611 |
2015 | $ | 313 |
2016 | $ | 314 |
2017 | $ | 311 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 44, 45, 46 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275 + Details
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