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Goodwill and Other Intangible Assets | 3 Months Ended
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Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets The changes in the net carrying amount of goodwill for the three months ended March 31, 2019 are as follows (in millions):
Balance as of December 31, 2018 | $ | 8,171 |
Goodwill related to current year acquisitions | 15 |
Goodwill related to disposals | (1 | )
Goodwill related to prior year acquisitions | 1 |
Foreign currency translation and other | 33 |
Balance as of March 31, 2019 | $ | 8,219 |
Other intangible assets by asset class are as follows (in millions):
| March 31, 2019 |  | December 31, 2018
| 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 | $ | 2,282 |  |  | $ | 1,501 |  |  | $ | 781 |  |  | $ | 2,240 |  |  | $ | 1,444 |  |  | $ | 796 |
Tradenames | 1,030 |  |  | 795 |  |  | 235 |  |  | 1,027 |  |  | 740 |  |  | 287 |
Technology and other | 391 |  |  | 330 |  |  | 61 |  |  | 391 |  |  | 325 |  |  | 66 |
Total | $ | 3,703 |  |  | $ | 2,626 |  |  | $ | 1,077 |  |  | $ | 3,658 |  |  | $ | 2,509 |  |  | $ | 1,149 |
The estimated future amortization for finite lived intangible assets as of March 31, 2019 is as follows (in millions):
Remainder of 2019 | $ | 311 |
2020 | 217 |
2021 | 128 |
2022 | 85 |
2023 | 73 |
2024 | 56 |
Thereafter | 207 |
Total | $ | 1,077 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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