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Supplementary Information Foreign Currency Exchange Gain (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |  |
Pre-tax exchange (losses) gains - net | [1] | $ 2 | $ (67) | $ (47) | $ (127)
Foreign Currency Transaction (Loss) Gain Tax (Expense) Benefit |  | (5) | 18 | (11) | 3
Foreign Currency Transaction (Loss) Gain After Tax |  | (3) | (49) | (58) | (124)
Subsidiary Monetary Position |  |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |  |
Pre-tax exchange (losses) gains - net |  | (32) | (61) | (47) | (300)
Foreign Currency Transaction (Loss) Gain Tax (Expense) Benefit |  | 3 | 16 | (11) | 44
Foreign Currency Transaction (Loss) Gain After Tax |  | (29) | (45) | (58) | (256)
Hedging Program [Member] |  |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |  |
Pre-tax exchange (losses) gains - net |  | 34 | (6) | 0 | 173
Foreign Currency Transaction (Loss) Gain Tax (Expense) Benefit |  | (8) | 2 | 0 | (41)
Foreign Currency Transaction (Loss) Gain After Tax |  | $ 26 | $ (4) | $ 0 | $ 132
[1] | Includes net pre-tax exchange losses of $(16) million and $(53) million associated with the devaluation of the Argentine peso for the three and nine months ended September 30, 2021, respectively, and $(26) million and $(56) million for the three and nine months ended September 30, 2020, respectively.

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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121605123&loc=d3e30226-110892 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 10 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=120253306&loc=d3e28228-110885 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 + Details
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