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Estimates (Components Of Intangibles And Other Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Gross Carrying Amount | $ 7,560 | $ 7,458
Accumulated Amortization | (1,560) | (1,342)
Customer relationships, contracts and agreements (3 to 46 years) |  |
Gross Carrying Amount | 7,106 | 6,979
Accumulated Amortization | (1,493) | (1,277)
Patents (10 years) |  |
Gross Carrying Amount | 48 | 48
Accumulated Amortization | (30) | (26)
Trade names (20 years) |  |
Gross Carrying Amount | 66 | 66
Accumulated Amortization | (28) | (25)
Total Amortizable Intangible Assets [Member] |  |
Gross Carrying Amount | 7,253 | 7,121
Accumulated Amortization | (1,560) | (1,342)
Trademarks [Member] |  |
Gross Carrying Amount | 295 | 295
Accumulated Amortization | 0 | 0
Other non-amortizable intangible assets [Member] |  |
Gross Carrying Amount | 12 | 42
Accumulated Amortization | 0 | 0
Other Amortizable Intangible Assets [Member] |  |
Gross Carrying Amount | 33 | 28
Accumulated Amortization | (9) | (14)
Non-amortizable intangible assets [Member] |  |
Gross Carrying Amount | 307 | 337
Accumulated Amortization | $ 0 | $ 0

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