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Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2019
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 nine months ended September 30, 2019 are as follows (in millions):
Balance as of December 31, 2018 | $ | 8,171 |
Goodwill related to current year acquisitions | 33 |
Goodwill related to disposals | (10 | )
Goodwill related to prior year acquisitions | 2 |
Foreign currency translation and other | (125 | )
Balance as of September 30, 2019 | $ | 8,071 |
Schedule of Other Intangible Assets by Asset Class | Other intangible assets by asset class are as follows (in millions):
| September 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 | $ | 2,229 |  |  | $ | 1,531 |  |  | $ | 698 |  |  | $ | 2,240 |  |  | $ | 1,444 |  |  | $ | 796 |
Tradenames | 1,025 |  |  | 899 |  |  | 126 |  |  | 1,027 |  |  | 740 |  |  | 287 |
Technology and other | 375 |  |  | 325 |  |  | 50 |  |  | 391 |  |  | 325 |  |  | 66 |
Total | $ | 3,629 |  |  | $ | 2,755 |  |  | $ | 874 |  |  | $ | 3,658 |  |  | $ | 2,509 |  |  | $ | 1,149 |
Schedule of Estimated Future Amortization Expense on Intangible Assets | The estimated future amortization for finite lived intangible assets as of September 30, 2019 is as follows (in millions):
Remainder of 2019 | $ | 96 |
2020 | 220 |
2021 | 126 |
2022 | 86 |
2023 | 76 |
2024 | 59 |
Thereafter | 211 |
Total | $ | 874 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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