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Supplementary Information Foreign Currency Exchange Gain (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |  |
Pre-tax exchange (losses) gains - net | [1] | $ (14) | $ 1 | $ (49) | $ (60)
Foreign Currency Transaction (Loss) Gain Tax (Expense) Benefit |  | (1) | 2 | (6) | (15)
Foreign Currency Transaction (Loss) Gain After Tax |  | (15) | 3 | (55) | (75)
Subsidiary Monetary Position |  |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |  |
Pre-tax exchange (losses) gains - net |  | 36 | (13) | (15) | (239)
Foreign Currency Transaction (Loss) Gain Tax (Expense) Benefit |  | (13) | 5 | (14) | 28
Foreign Currency Transaction (Loss) Gain After Tax |  | 23 | (8) | (29) | (211)
Hedging Program [Member] |  |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |  |
Pre-tax exchange (losses) gains - net |  | (50) | 14 | (34) | 179
Foreign Currency Transaction (Loss) Gain Tax (Expense) Benefit |  | 12 | (3) | 8 | (43)
Foreign Currency Transaction (Loss) Gain After Tax |  | $ (38) | $ 11 | $ (26) | $ 136
[1] | Includes net pre-tax exchange losses of $14 million and $37 million associated with the devaluation of the Argentine peso for the three and six months ended June 30, 2021, respectively, and $22 million and $31 million for the three and six months ended June 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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