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Schedule of Goodwill (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Goodwill [Line Items] |  |  |
Gross goodwill |  |  | $ 2,809
Goodwill [Roll Forward] |  |  |
Goodwill | $ 842 | $ 691 |
Goodwill, Impaired, Accumulated Impairment Loss |  |  | (2,118)
Acquisition | 194 | 203 |
Adjustments to the allocation of purchase price | (63) | (52) |
Goodwill | 973 | 842 |
Americas |  |  |
Goodwill [Line Items] |  |  |
Gross goodwill |  |  | 1,904
Goodwill [Roll Forward] |  |  |
Goodwill | 479 | 317 |
Goodwill, Impaired, Accumulated Impairment Loss |  |  | (1,587)
Acquisition | 77 | 190 |
Adjustments to the allocation of purchase price | (19) | (28) |
Goodwill | 537 | 479 |
International |  |  |
Goodwill [Line Items] |  |  |
Gross goodwill |  |  | 905
Goodwill [Roll Forward] |  |  |
Goodwill | 363 | 374 |
Goodwill, Impaired, Accumulated Impairment Loss |  |  | $ (531)
Acquisition | 117 | 13 |
Adjustments to the allocation of purchase price | (44) | (24) |
Goodwill | $ 436 | $ 363 |

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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=35741047&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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