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Goodwill and Other Intangible Assets (Goodwill Roll Forward) (Details) (USD $) | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 3 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 US | Dec. 31, 2012 US | Dec. 31, 2011 US | Dec. 31, 2013 Andes | Dec. 31, 2012 Andes | Dec. 31, 2011 Andes | Dec. 31, 2013 MCAC | Dec. 31, 2012 MCAC | Dec. 31, 2011 MCAC | Dec. 31, 2013 EMEA | Dec. 31, 2012 EMEA | Dec. 31, 2011 EMEA | Dec. 31, 2013 Asia | Dec. 31, 2012 Asia | Dec. 31, 2011 Asia | Sep. 30, 2011 Chigen | Sep. 30, 2011 Chigen Asia
Goodwill [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ 3,954,000,000 | $ 3,959,000,000 | $ 3,980,000,000 | $ 2,658,000,000 | $ 2,663,000,000 | $ 2,672,000,000 | $ 899,000,000 | $ 899,000,000 | $ 899,000,000 | $ 149,000,000 | $ 149,000,000 | $ 149,000,000 | $ 180,000,000 | $ 180,000,000 | $ 180,000,000 | $ 68,000,000 | $ 68,000,000 |  | $ 80,000,000 |  |
Accumulated impairment losses | (2,332,000,000) | (1,960,000,000) | (160,000,000) | (2,152,000,000) | (1,838,000,000) | (21,000,000) | 0 | 0 | 0 | 0 | 0 | 0 | (180,000,000) | (122,000,000) | (122,000,000) | 0 | 0 |  | (17,000,000) |  |
Net balance | 1,999,000,000 | 3,820,000,000 |  | 825,000,000 | 2,651,000,000 |  | 899,000,000 | 899,000,000 |  | 149,000,000 | 149,000,000 |  | 58,000,000 | 58,000,000 |  | 68,000,000 | 63,000,000 |  |  |  |
Goodwill impairment expense | (372,000,000) | (1,817,000,000) | (17,000,000) | (314,000,000) | (1,817,000,000) |  | 0 | 0 |  | 0 | 0 |  | (58,000,000) | 0 |  | 0 | 0 |  |  | (17,000,000) | (17,000,000)
Goodwill acquired during the year |  | 0 |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 0 | [1] |  |  |
Goodwill associated with the sale of a business | 0 |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 0 |  |  |  |  |
Foreign currency translation and other | (5,000,000) | (4,000,000) |  | (5,000,000) | (9,000,000) |  | 0 | 0 |  | 0 | 0 |  | 0 | 0 |  | 0 | 5,000,000 |  |  |  |
Net balance | 1,622,000,000 | 1,999,000,000 | 3,820,000,000 | 506,000,000 | 825,000,000 |  | 899,000,000 | 899,000,000 |  | 149,000,000 | 149,000,000 |  | 0 | 58,000,000 |  | 68,000,000 | 68,000,000 |  |  |  |
Assets carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 17,000,000
[1] | Both the gross carrying amount and the accumulated impairment losses of the Asia generation segment have been reduced by $17 million with no impact on the net carrying amount for the segment. This relates to Chigen, which had fully impaired goodwill of $17 million and was sold during the year.

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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