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Derivative and Other Financial Instruments - Fair Value Hedges and Contracts Not Designated as Hedges (Details) - Derivatives not designated as hedges - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Derivative [Line Items] |  |  |  |
Gain (loss) on derivative instruments, net, pretax | $ (7) | $ 12 | $ (19) | $ 19
Net sales | Foreign exchange |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (loss) on derivative instruments, net, pretax | 0 | 0 | (1) | 0
Cost of products sold | Foreign exchange |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (loss) on derivative instruments, net, pretax | 0 | (1) | 0 | (1)
Foreign exchange | Foreign exchange |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (loss) on derivative instruments, net, pretax | (7) | 13 | (18) | 19
cck_IncomeFromDiscontinuedOperations | Foreign exchange |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (loss) on derivative instruments, net, pretax | $ 0 | $ 0 | $ 0 | $ 1

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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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