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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of changes in the net carrying amount of goodwill by operating segment | The changes in the net carrying amount of goodwill for the six months ended June 30, 2017 are as follows (in millions):
Balance as of January 1, 2017 | $ | 7,410 |
Goodwill related to current year acquisitions | 119 |
Goodwill related to disposals | (1 | )
Goodwill related to prior year acquisitions | 24 |
Foreign currency translation | 193 |
Balance as of June 30, 2017 | $ | 7,745 |
Schedule of other intangible assets by asset class | Other intangible assets by asset class are as follows (in millions):
| June 30, 2017 |  | December 31, 2016
| Gross Carrying Amount |  | Accumulated Amortization and Impairment |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization and Impairment |  | Net Carrying Amount
Customer related and contract based | 2,050 |  |  | 1,307 |  |  | 743 |  |  | 2,023 |  |  | 1,198 |  |  | 825 |
Tradenames(1) | $ | 1,037 |  |  | $ | 423 |  |  | $ | 614 |  |  | $ | 1,027 |  |  | $ | 7 |  |  | $ | 1,020 |
Technology and other(1) | 366 |  |  | 321 |  |  | 45 |  |  | 347 |  |  | 302 |  |  | 45 |
Total | $ | 3,453 |  |  | $ | 2,051 |  |  | $ | 1,402 |  |  | $ | 3,397 |  |  | $ | 1,507 |  |  | $ | 1,890 |
Schedule of estimated future amortization expense on intangible assets | The estimated future amortization for finite lived intangible assets as of June 30, 2017 is as follows (in millions):
| As of June 30, 2017
Remainder of 2017 | $ | 206 |
2018 | 370 |
2019 | 351 |
2020 | 192 |
2021 | 83 |
Thereafter | 200 |
Total | $ | 1,402 |

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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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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived 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 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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