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Divestitures - Narrative (Details) $ in Millions, € in Billions			3 Months Ended			12 Months Ended
	Aug. 31, 2021 USD ($)	Aug. 31, 2021 EUR (€)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of discontinued operations, net of cash disposed				$ 6	$ 0
Income from continuing operations before taxes and equity in net earnings of affiliates				307	263
European Tinplate
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from continuing operations before taxes and equity in net earnings of affiliates				$ 15
European Tinplate
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, pre tax loss	$ 101
Income tax charges	81
European Tinplate | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of discontinued operations, net of cash disposed	$ 2,300	€ 1.9
Equity method investment retained after disposal, percent	20.00%	20.00%
Net sales					$ 514
Transit Packaging | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales						$ 39
Transit Packaging | Discontinued Operations, Disposed of by Sale | Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of discontinued operations, net of cash disposed			$ 182
Gain on disposition of business			$ 100

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