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Business Restructuring (Schedule of Restructuring Activity) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring Reserve | $ 308 |  |  | $ 242 | $ 308 | $ 242 | $ 224 | $ 110
Business restructuring, net | $ 0 |  |  | $ 2 | 172 | 175 |  |
Restructuring Reserve, Accrual Adjustment |  |  |  |  | 26 | 19 |  |
Payments for Restructuring |  |  |  |  | 98 | 35 |  |
Restructuring Reserve, Translation Adjustment |  |  |  |  | 10 | (8) |  |
2019 Restructuring Program [Member] |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring charges, pretax |  | $ 176 |  |  |  |  |  |
Business restructuring, net |  |  | $ 22 |  | $ 198 | $ 194 |  |

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