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- Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Intangible assets with finite lives |  |
Gross Carrying Amount | $ 3,667 | $ 3,658
Accumulated Amortization and Impairment | 2,694 | 2,509
Net Carrying Amount | 973 | 1,149
Estimated amortization for intangible assets |  |
Remainder of 2019 | 192 |
2020 | 223 |
2021 | 128 |
2022 | 87 |
2023 | 74 |
2024 | 58 |
Thereafter | 211 |
Total | 973 |
Customer related and contract based |  |
Intangible assets with finite lives |  |
Gross Carrying Amount | 2,254 | 2,240
Accumulated Amortization and Impairment | 1,517 | 1,444
Net Carrying Amount | 737 | 796
Tradenames |  |
Intangible assets with finite lives |  |
Gross Carrying Amount | 1,028 | 1,027
Accumulated Amortization and Impairment | 847 | 740
Net Carrying Amount | 181 | 287
Technology and other |  |
Intangible assets with finite lives |  |
Gross Carrying Amount | 385 | 391
Accumulated Amortization and Impairment | 330 | 325
Net Carrying Amount | $ 55 | $ 66

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