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Goodwill and Other Intangible Assets | 6 Months Ended
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Jun. 30, 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 six months ended June 30, 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 | (9 | )
Goodwill related to prior year acquisitions | 2 |
Foreign currency translation and other | 19 |
Balance as of June 30, 2019 | $ | 8,198 |
Other intangible assets by asset class are as follows (in millions):
| June 30, 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 | $ | 2,254 |  |  | $ | 1,517 |  |  | $ | 737 |  |  | $ | 2,240 |  |  | $ | 1,444 |  |  | $ | 796 |
Tradenames | 1,028 |  |  | 847 |  |  | 181 |  |  | 1,027 |  |  | 740 |  |  | 287 |
Technology and other | 385 |  |  | 330 |  |  | 55 |  |  | 391 |  |  | 325 |  |  | 66 |
Total | $ | 3,667 |  |  | $ | 2,694 |  |  | $ | 973 |  |  | $ | 3,658 |  |  | $ | 2,509 |  |  | $ | 1,149 |
The estimated future amortization for finite lived intangible assets as of June 30, 2019 is as follows (in millions):
Remainder of 2019 | $ | 192 |
2020 | 223 |
2021 | 128 |
2022 | 87 |
2023 | 74 |
2024 | 58 |
Thereafter | 211 |
Total | $ | 973 |

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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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