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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of changes in goodwill | Changes in goodwill during the years ended December 31, 2017 and 2016 are summarized as follows (in millions):
| IFS |  | GFS |  | Corporate & Other |  | Total
Balance, December 31, 2015 | $ | 7,676 |  |  | $ | 6,605 |  |  | $ | 464 |  |  | $ | 14,745 |
Purchase price and foreign currency adjustments | — |  |  | (273 | ) |  | 65 |  |  | (208 | )
Goodwill relating to PS&E included in assets held for sale | — |  |  | — |  |  | (359 | ) |  | (359 | )
Balance, December 31, 2016 | 7,676 |  |  | 6,332 |  |  | 170 |  |  | 14,178 |
Purchase price and foreign currency adjustments | — |  |  | 39 |  |  | — |  |  | 39 |
Goodwill distributed through sale of businesses | (14 | ) |  | (473 | ) |  | — |  |  | (487 | )
Balance, December 31, 2017 | $ | 7,662 |  |  | $ | 5,898 |  |  | $ | 170 |  |  | $ | 13,730 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + 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 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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