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Estimates (Components Of Intangibles And Other Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Gross Carrying Amount | $ 7,953 | $ 7,975
Accumulated Amortization | (2,207) | (1,821)
Customer relationships, contracts and agreements (3 to 46 years) |  |
Gross Carrying Amount | 7,513 | 7,535
Accumulated Amortization | (2,117) | (1,743)
Patents (10 years) |  |
Gross Carrying Amount | 48 | 48
Accumulated Amortization | (40) | (35)
Trade names (20 years) |  |
Gross Carrying Amount | 66 | 66
Accumulated Amortization | (35) | (31)
Total Amortizable Intangible Assets [Member] |  |
Gross Carrying Amount | 7,646 | 7,668
Accumulated Amortization | (2,207) | (1,821)
Trademarks [Member] |  |
Gross Carrying Amount | 295 | 295
Accumulated Amortization | 0 | 0
Other non-amortizable intangible assets [Member] |  |
Gross Carrying Amount | 12 | 12
Accumulated Amortization | 0 | 0
Other Amortizable Intangible Assets [Member] |  |
Gross Carrying Amount | 19 | 19
Accumulated Amortization | (15) | (12)
Non-amortizable intangible assets [Member] |  |
Gross Carrying Amount | 307 | 307
Accumulated Amortization | $ 0 | $ 0

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