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Goodwill and Other Intangible Assets (Summary of Intangible Assets) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Goodwill and Other Intangible Assets |  |  |  |  |
Accumulated Amortization | $ (945) |  | $ (945) |  | $ (887)
Intangible Assets Gross, Carrying Amount | 2,003 |  | 2,003 |  | 1,980
Intangible Assets, Net Intangibles | 1,058 |  | 1,058 |  | 1,093
Amortization | 33 | $ 33 | 65 | $ 68 |
Customer and distributor relationships |  |  |  |  |
Goodwill and Other Intangible Assets |  |  |  |  |
Carrying Amount | 941 |  | 941 |  | 941
Accumulated Amortization | (436) |  | (436) |  | (410)
Net Intangibles | 505 |  | 505 |  | 531
Proprietary technology and patents |  |  |  |  |
Goodwill and Other Intangible Assets |  |  |  |  |
Carrying Amount | 206 |  | 206 |  | 206
Accumulated Amortization | (138) |  | (138) |  | (131)
Net Intangibles | 68 |  | 68 |  | 75
Trademarks |  |  |  |  |
Goodwill and Other Intangible Assets |  |  |  |  |
Carrying Amount | 143 |  | 143 |  | 143
Accumulated Amortization | (68) |  | (68) |  | (63)
Net Intangibles | 75 |  | 75 |  | 80
Software |  |  |  |  |
Goodwill and Other Intangible Assets |  |  |  |  |
Carrying Amount | 523 |  | 523 |  | 500
Accumulated Amortization | (284) |  | (284) |  | (265)
Net Intangibles | 239 |  | 239 |  | 235
Other |  |  |  |  |
Goodwill and Other Intangible Assets |  |  |  |  |
Carrying Amount | 21 |  | 21 |  | 21
Accumulated Amortization | (19) |  | (19) |  | (18)
Net Intangibles | 2 |  | 2 |  | 3
Indefinite-lived intangibles |  |  |  |  |
Goodwill and Other Intangible Assets |  |  |  |  |
Accumulated Amortization | 0 |  | 0 |  | 0
Indefinite-lived intangibles | $ 169 |  | $ 169 |  | $ 169

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