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Supplementary Information Foreign Currency Exchange Gain (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |
Pre-tax exchange (loss) gain | [1] | $ (54) | $ (174) | $ (99)
Tax benefits (expenses) on exchange (loss) gain |  | (34) | 13 | 15
Net after-tax exchange (loss) gain |  | (88) | (161) | (84)
Subsidiary Monetary Position |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |
Pre-tax exchange (loss) gain |  | (72) | (263) | (41)
Tax benefits (expenses) on exchange (loss) gain |  | (30) | 34 | 2
Net after-tax exchange (loss) gain |  | (102) | (229) | (39)
Hedging Program [Member] |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |
Pre-tax exchange (loss) gain |  | 18 | 89 | (58)
Tax benefits (expenses) on exchange (loss) gain |  | (4) | (21) | 13
Net after-tax exchange (loss) gain |  | 14 | 68 | (45)
Argentine peso devaluation [Member] | Hedging Program [Member] |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |
Pre-tax exchange (loss) gain |  | $ (67) | $ (82) | $ (51)
[1] | Includes net pre-tax exchange gains (losses) of $(67) million, $(82) million and $(51) million associated with the devaluation of the Argentine peso for the years ended December 31, 2021, 2020 and 2019, 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=125521441&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=123602790&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=124440516&loc=d3e30840-110895 + Details
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